GL: make it possible to read pixel data into mutable image views.

UGH I hate cube maps and all the driver bugs that make them so freaking
annoying to implement.

doc/changelog.dox

@@ -131,6 +131,12 @@ See also:
 -   Added an ability to use Magnum with multiple OpenGL contexts using
     @ref GL::Context::makeCurrent(), see @ref GL-Context-multiple for more
     information
+-   @ref GL::AbstractFramebuffer::read(), @ref GL::Texture::image(),
+    @ref GL::Texture::subImage(), @ref GL::Texture::compressedImage(),
+    @ref GL::Texture::setCompressedSubImage() and equivalent APIs in other
+    texture classes now can read the pixels into
+    @ref BasicMutableImageView "MutableImageView*D" and
+    @ref BasicMutableCompressedImageView "MutableCompressedImageView*D" as well
 
 @subsubsection changelog-latest-new-math Math library
 

src/Magnum/GL/AbstractFramebuffer.cpp

@@ -26,6 +26,7 @@
 #include "AbstractFramebuffer.h"
 
 #include "Magnum/Image.h"
+#include "Magnum/ImageView.h"
 #ifndef MAGNUM_TARGET_GLES2
 #include "Magnum/GL/BufferImage.h"
 #endif
@@ -334,25 +335,35 @@ AbstractFramebuffer& AbstractFramebuffer::clearDepthStencil(const Float depth, c
 }
 #endif
 
-void AbstractFramebuffer::read(const Range2Di& rectangle, Image2D& image) {
+void AbstractFramebuffer::read(const Range2Di& rectangle, MutableImageView2D& image) {
-    bindInternal(FramebufferTarget::Read);
+    CORRADE_ASSERT(image.data().data() != nullptr,
-
+        "GL::AbstractFramebuffer::read(): image view is nullptr", );
-    /* Reallocate only if needed */
+    CORRADE_ASSERT(image.size() == rectangle.size(),
-    const std::size_t dataSize = Magnum::Implementation::imageDataSizeFor(image, rectangle.size());
+        "GL::AbstractFramebuffer::read(): expected image view size" << rectangle.size() << "but got" << image.size(), );
-    Containers::Array<char> data{image.release()};
-    if(data.size() < dataSize)
-        data = Containers::Array<char>{dataSize};
 
+    bindInternal(FramebufferTarget::Read);
     #ifndef MAGNUM_TARGET_GLES2
     Buffer::unbindInternal(Buffer::TargetHint::PixelPack);
     #endif
     Context::current().state().renderer->applyPixelStoragePack(image.storage());
-    (Context::current().state().framebuffer->readImplementation)(rectangle, pixelFormat(image.format()), pixelType(image.format(), image.formatExtra()), data.size(), data
+    (Context::current().state().framebuffer->readImplementation)(rectangle, pixelFormat(image.format()), pixelType(image.format(), image.formatExtra()), image.data().size(), image.data()
         #ifdef MAGNUM_TARGET_GLES2
         + Magnum::Implementation::pixelStorageSkipOffsetFor(image, rectangle.size())
         #endif
         );
+}
+
+void AbstractFramebuffer::read(const Range2Di& rectangle, Image2D& image) {
+    /* Reallocate only if needed */
+    const std::size_t dataSize = Magnum::Implementation::imageDataSizeFor(image, rectangle.size());
+    Containers::Array<char> data{image.release()};
+    if(data.size() < dataSize)
+        data = Containers::Array<char>{dataSize};
+
+    /* Replace the storage, proxy to the function taking a view */
     image = Image2D{image.storage(), image.format(), image.formatExtra(), image.pixelSize(), rectangle.size(), std::move(data)};
+    MutableImageView2D view(image);
+    read(rectangle, view);
 }
 
 Image2D AbstractFramebuffer::read(const Range2Di& rectangle, Image2D&& image) {

src/Magnum/GL/AbstractFramebuffer.h

@@ -380,11 +380,13 @@ class MAGNUM_GL_EXPORT AbstractFramebuffer {
          *
          * Image parameters like format and type of pixel data are taken from
          * given image. The storage is not reallocated if it is large enough to
-         * contain the new data. On OpenGL ES 2.0 and WebGL 1.0, if
+         * contain the new data --- however if you want to read into existing
-         * @ref PixelStorage::skip() is set, the functionality is emulated by
+         * memory or *ensure* a reallocation does not happen, use
-         * adjusting the data pointer.
+         * @ref read(const Range2Di&, MutableImageView2D&) instead.
          *
-         * If @gl_extension{ARB,robustness} is available, the operation is
+         * On OpenGL ES 2.0 and WebGL 1.0, if @ref PixelStorage::skip() is set,
+         * the functionality is emulated by adjusting the data pointer. If
+         * @gl_extension{ARB,robustness} is available, the operation is
          * protected from buffer overflow.
          * @see @fn_gl{BindFramebuffer}, then @fn_gl{PixelStore} and
          *      @fn_gl_keyword{ReadPixels} or
@@ -405,6 +407,16 @@ class MAGNUM_GL_EXPORT AbstractFramebuffer {
          */
         Image2D read(const Range2Di& rectangle, Image2D&& image);
 
+        /**
+         * @brief Read block of pixels from framebuffer to image
+         *
+         * Compared to @ref read(const Range2Di&, Image2D&) the function
+         * reads the pixels into the memory provided by @p image, expecting
+         * it's not @cpp nullptr @ce and its size is the same as @p rectangle
+         * size.
+         */
+        void read(const Range2Di& rectangle, MutableImageView2D& image);
+
         #ifndef MAGNUM_TARGET_GLES2
         /**
          * @brief Read block of pixels from framebuffer to buffer image

src/Magnum/GL/AbstractTexture.cpp

@@ -1602,6 +1602,24 @@ template void MAGNUM_GL_EXPORT AbstractTexture::image<1>(GLint, Image<1>&);
 template void MAGNUM_GL_EXPORT AbstractTexture::image<2>(GLint, Image<2>&);
 template void MAGNUM_GL_EXPORT AbstractTexture::image<3>(GLint, Image<3>&);
 
+template<UnsignedInt dimensions> void AbstractTexture::image(GLint level, BasicMutableImageView<dimensions>& image) {
+    #ifndef CORRADE_NO_ASSERT
+    const Math::Vector<dimensions, Int> size = DataHelper<dimensions>::imageSize(*this, level);
+    CORRADE_ASSERT(image.data().data() != nullptr,
+        "GL::AbstractTexture::image(): image view is nullptr", );
+    CORRADE_ASSERT(image.size() == size,
+        "GL::AbstractTexture::image(): expected image view size" << size << "but got" << image.size(), );
+    #endif
+
+    Buffer::unbindInternal(Buffer::TargetHint::PixelPack);
+    Context::current().state().renderer->applyPixelStoragePack(image.storage());
+    (this->*Context::current().state().texture->getImageImplementation)(level, pixelFormat(image.format()), pixelType(image.format(), image.formatExtra()), image.data().size(), image.data());
+}
+
+template void MAGNUM_GL_EXPORT AbstractTexture::image<1>(GLint, BasicMutableImageView<1>&);
+template void MAGNUM_GL_EXPORT AbstractTexture::image<2>(GLint, BasicMutableImageView<2>&);
+template void MAGNUM_GL_EXPORT AbstractTexture::image<3>(GLint, BasicMutableImageView<3>&);
+
 template<UnsignedInt dimensions> void AbstractTexture::image(GLint level, BufferImage<dimensions>& image, BufferUsage usage) {
     const Math::Vector<dimensions, Int> size = DataHelper<dimensions>::imageSize(*this, level);
     const std::size_t dataSize = Magnum::Implementation::imageDataSizeFor(image, size);
@@ -1652,6 +1670,45 @@ template void MAGNUM_GL_EXPORT AbstractTexture::compressedImage<1>(GLint, Compre
 template void MAGNUM_GL_EXPORT AbstractTexture::compressedImage<2>(GLint, CompressedImage<2>&);
 template void MAGNUM_GL_EXPORT AbstractTexture::compressedImage<3>(GLint, CompressedImage<3>&);
 
+template<UnsignedInt dimensions> void AbstractTexture::compressedImage(const GLint level, BasicMutableCompressedImageView<dimensions>& image) {
+    #ifndef CORRADE_NO_ASSERT
+    CORRADE_ASSERT(image.data().data() != nullptr,
+        "GL::AbstractTexture::compressedImage(): image view is nullptr", );
+
+    const Math::Vector<dimensions, Int> size = DataHelper<dimensions>::imageSize(*this, level);
+
+    CORRADE_ASSERT(image.size() == size,
+        "GL::AbstractTexture::compressedImage(): expected image view size" << size << "but got" << image.size(), );
+
+    /* If the user-provided pixel storage doesn't tell us all properties about
+       the compression, we need to ask GL for it */
+    std::size_t dataSize;
+    if(!image.storage().compressedBlockSize().product() || !image.storage().compressedBlockDataSize()) {
+        GLint textureDataSize;
+        (this->*Context::current().state().texture->getLevelParameterivImplementation)(level, GL_TEXTURE_COMPRESSED_IMAGE_SIZE, &textureDataSize);
+        dataSize = textureDataSize;
+    } else dataSize = Magnum::Implementation::compressedImageDataSizeFor(image, size);
+
+    CORRADE_ASSERT(image.data().size() == dataSize,
+        "GL::AbstractTexture::compressedImage(): expected image view data size" << dataSize << "bytes but got" << image.data().size(), );
+
+    /* Internal texture format */
+    GLint format;
+    (this->*Context::current().state().texture->getLevelParameterivImplementation)(level, GL_TEXTURE_INTERNAL_FORMAT, &format);
+
+    CORRADE_ASSERT(compressedPixelFormat(image.format()) == CompressedPixelFormat(format),
+        "GL::AbstractTexture::compressedImage(): expected image view format" << CompressedPixelFormat(format) << "but got" << compressedPixelFormat(image.format()), );
+    #endif
+
+    Buffer::unbindInternal(Buffer::TargetHint::PixelPack);
+    Context::current().state().renderer->applyPixelStoragePack(image.storage());
+    (this->*Context::current().state().texture->getCompressedImageImplementation)(level, image.data().size(), image.data());
+}
+
+template void MAGNUM_GL_EXPORT AbstractTexture::compressedImage<1>(GLint, BasicMutableCompressedImageView<1>&);
+template void MAGNUM_GL_EXPORT AbstractTexture::compressedImage<2>(GLint, BasicMutableCompressedImageView<2>&);
+template void MAGNUM_GL_EXPORT AbstractTexture::compressedImage<3>(GLint, BasicMutableCompressedImageView<3>&);
+
 template<UnsignedInt dimensions> void AbstractTexture::compressedImage(const GLint level, CompressedBufferImage<dimensions>& image, BufferUsage usage) {
     const Math::Vector<dimensions, Int> size = DataHelper<dimensions>::imageSize(*this, level);
 
@@ -1684,28 +1741,43 @@ template void MAGNUM_GL_EXPORT AbstractTexture::compressedImage<2>(GLint, Compre
 template void MAGNUM_GL_EXPORT AbstractTexture::compressedImage<3>(GLint, CompressedBufferImage<3>&, BufferUsage);
 
 template<UnsignedInt dimensions> void AbstractTexture::subImage(const GLint level, const RangeTypeFor<dimensions, Int>& range, Image<dimensions>& image) {
-    createIfNotAlready();
+    /* Reallocate only if needed */
-
     const Math::Vector<dimensions, Int> size = range.size();
     const std::size_t dataSize = Magnum::Implementation::imageDataSizeFor(image, size);
-    const Vector3i paddedOffset = Vector3i::pad<dimensions>(range.min());
-    const Vector3i paddedSize = Vector3i::pad(size, 1);
-
-    /* Reallocate only if needed */
     Containers::Array<char> data{image.release()};
     if(data.size() < dataSize)
         data = Containers::Array<char>{dataSize};
 
-    Buffer::unbindInternal(Buffer::TargetHint::PixelPack);
-    Context::current().state().renderer->applyPixelStoragePack(image.storage());
-    glGetTextureSubImage(_id, level, paddedOffset.x(), paddedOffset.y(), paddedOffset.z(), paddedSize.x(), paddedSize.y(), paddedSize.z(), GLenum(pixelFormat(image.format())), GLenum(pixelType(image.format(), image.formatExtra())), data.size(), data);
     image = Image<dimensions>{image.storage(), image.format(), image.formatExtra(), image.pixelSize(), size, std::move(data)};
+    BasicMutableImageView<dimensions> view(image);
+    subImage(level, range, view);
 }
 
 template void MAGNUM_GL_EXPORT AbstractTexture::subImage<1>(GLint, const Range1Di&, Image<1>&);
 template void MAGNUM_GL_EXPORT AbstractTexture::subImage<2>(GLint, const Range2Di&, Image<2>&);
 template void MAGNUM_GL_EXPORT AbstractTexture::subImage<3>(GLint, const Range3Di&, Image<3>&);
 
+template<UnsignedInt dimensions> void AbstractTexture::subImage(const GLint level, const RangeTypeFor<dimensions, Int>& range, BasicMutableImageView<dimensions>& image) {
+    CORRADE_ASSERT(image.data().data() != nullptr,
+        "GL::AbstractTexture::subImage(): image view is nullptr", );
+    CORRADE_ASSERT(image.size() == range.size(),
+        "GL::AbstractTexture::subImage(): expected image view size" << range.size() << "but got" << image.size(), );
+
+    createIfNotAlready();
+
+    const Math::Vector<dimensions, Int> size = range.size();
+    const Vector3i paddedOffset = Vector3i::pad<dimensions>(range.min());
+    const Vector3i paddedSize = Vector3i::pad(size, 1);
+
+    Buffer::unbindInternal(Buffer::TargetHint::PixelPack);
+    Context::current().state().renderer->applyPixelStoragePack(image.storage());
+    glGetTextureSubImage(_id, level, paddedOffset.x(), paddedOffset.y(), paddedOffset.z(), paddedSize.x(), paddedSize.y(), paddedSize.z(), GLenum(pixelFormat(image.format())), GLenum(pixelType(image.format(), image.formatExtra())), image.data().size(), image.data());
+}
+
+template void MAGNUM_GL_EXPORT AbstractTexture::subImage<1>(GLint, const Range1Di&, BasicMutableImageView<1>&);
+template void MAGNUM_GL_EXPORT AbstractTexture::subImage<2>(GLint, const Range2Di&, BasicMutableImageView<2>&);
+template void MAGNUM_GL_EXPORT AbstractTexture::subImage<3>(GLint, const Range3Di&, BasicMutableImageView<3>&);
+
 template<UnsignedInt dimensions> void AbstractTexture::subImage(const GLint level, const RangeTypeFor<dimensions, Int>& range, BufferImage<dimensions>& image, const BufferUsage usage) {
     createIfNotAlready();
 
@@ -1775,6 +1847,48 @@ template void MAGNUM_GL_EXPORT AbstractTexture::compressedSubImage<1>(GLint, con
 template void MAGNUM_GL_EXPORT AbstractTexture::compressedSubImage<2>(GLint, const Range2Di&, CompressedImage<2>&);
 template void MAGNUM_GL_EXPORT AbstractTexture::compressedSubImage<3>(GLint, const Range3Di&, CompressedImage<3>&);
 
+template<UnsignedInt dimensions> void AbstractTexture::compressedSubImage(const GLint level, const RangeTypeFor<dimensions, Int>& range, BasicMutableCompressedImageView<dimensions>& image) {
+    #ifndef CORRADE_NO_ASSERT
+    CORRADE_ASSERT(image.data().data() != nullptr,
+        "GL::AbstractTexture::compressedSubImage(): image view is nullptr", );
+    CORRADE_ASSERT(image.size() == range.size(),
+        "GL::AbstractTexture::compressedSubImage(): expected image view size" << range.size() << "but got" << image.size(), );
+
+    createIfNotAlready();
+
+    const Math::Vector<dimensions, Int> size = range.size();
+
+    /* Internal texture format */
+    GLint format;
+    (this->*Context::current().state().texture->getLevelParameterivImplementation)(level, GL_TEXTURE_INTERNAL_FORMAT, &format);
+
+    CORRADE_ASSERT(compressedPixelFormat(image.format()) == CompressedPixelFormat(format),
+        "GL::AbstractTexture::compressedSubImage(): expected image view format" << CompressedPixelFormat(format) << "but got" << compressedPixelFormat(image.format()), );
+
+    /* Calculate compressed subimage size. If the user-provided pixel storage
+       doesn't tell us all properties about the compression, we need to ask GL
+       for it. That requires GL_ARB_internalformat_query2. */
+    std::size_t dataSize;
+    if(!image.storage().compressedBlockSize().product() || !image.storage().compressedBlockDataSize())
+        dataSize = compressedSubImageSize<dimensions>(TextureFormat(format), size);
+    else dataSize = Magnum::Implementation::compressedImageDataSizeFor(image, size);
+
+    CORRADE_ASSERT(image.data().size() == dataSize,
+        "GL::AbstractTexture::compressedSubImage(): expected image view data size" << dataSize << "bytes but got" << image.data().size(), );
+    #endif
+
+    const Vector3i paddedOffset = Vector3i::pad<dimensions>(range.min());
+    const Vector3i paddedSize = Vector3i::pad(size, 1);
+
+    Buffer::unbindInternal(Buffer::TargetHint::PixelPack);
+    Context::current().state().renderer->applyPixelStoragePack(image.storage());
+    glGetCompressedTextureSubImage(_id, level, paddedOffset.x(), paddedOffset.y(), paddedOffset.z(), paddedSize.x(), paddedSize.y(), paddedSize.z(), image.data().size(), image.data());
+}
+
+template void MAGNUM_GL_EXPORT AbstractTexture::compressedSubImage<1>(GLint, const Range1Di&, BasicMutableCompressedImageView<1>&);
+template void MAGNUM_GL_EXPORT AbstractTexture::compressedSubImage<2>(GLint, const Range2Di&, BasicMutableCompressedImageView<2>&);
+template void MAGNUM_GL_EXPORT AbstractTexture::compressedSubImage<3>(GLint, const Range3Di&, BasicMutableCompressedImageView<3>&);
+
 template<UnsignedInt dimensions> void AbstractTexture::compressedSubImage(const GLint level, const RangeTypeFor<dimensions, Int>& range, CompressedBufferImage<dimensions>& image, const BufferUsage usage) {
     createIfNotAlready();
 

src/Magnum/GL/AbstractTexture.h

@@ -489,12 +489,16 @@ class MAGNUM_GL_EXPORT AbstractTexture: public AbstractObject {
         void generateMipmap();
 
         #ifndef MAGNUM_TARGET_GLES
+        template<UnsignedInt dimensions> void image(GLint level, BasicMutableImageView<dimensions>& image);
         template<UnsignedInt dimensions> void image(GLint level, Image<dimensions>& image);
         template<UnsignedInt dimensions> void image(GLint level, BufferImage<dimensions>& image, BufferUsage usage);
+        template<UnsignedInt dimensions> void compressedImage(GLint level, BasicMutableCompressedImageView<dimensions>& image);
         template<UnsignedInt dimensions> void compressedImage(GLint level, CompressedImage<dimensions>& image);
         template<UnsignedInt dimensions> void compressedImage(GLint level, CompressedBufferImage<dimensions>& image, BufferUsage usage);
+        template<UnsignedInt dimensions> void subImage(GLint level, const RangeTypeFor<dimensions, Int>& range, BasicMutableImageView<dimensions>& image);
         template<UnsignedInt dimensions> void subImage(GLint level, const RangeTypeFor<dimensions, Int>& range, Image<dimensions>& image);
         template<UnsignedInt dimensions> void subImage(GLint level, const RangeTypeFor<dimensions, Int>& range, BufferImage<dimensions>& image, BufferUsage usage);
+        template<UnsignedInt dimensions> void compressedSubImage(GLint level, const RangeTypeFor<dimensions, Int>& range, BasicMutableCompressedImageView<dimensions>& image);
         template<UnsignedInt dimensions> void compressedSubImage(GLint level, const RangeTypeFor<dimensions, Int>& range, CompressedImage<dimensions>& image);
         template<UnsignedInt dimensions> void compressedSubImage(GLint level, const RangeTypeFor<dimensions, Int>& range, CompressedBufferImage<dimensions>& image, BufferUsage usage);
         #endif

src/Magnum/GL/CMakeLists.txt

@@ -24,13 +24,10 @@
 #
 
 set(MagnumGL_SRCS
-    AbstractFramebuffer.cpp
     AbstractObject.cpp
-    AbstractTexture.cpp
     AbstractShaderProgram.cpp
     Attribute.cpp
     Buffer.cpp
-    CubeMapTexture.cpp
     Context.cpp
     DefaultFramebuffer.cpp
     Framebuffer.cpp
@@ -54,6 +51,9 @@ set(MagnumGL_SRCS
     Implementation/maxTextureSize.cpp)
 
 set(MagnumGL_GracefulAssert_SRCS
+    AbstractFramebuffer.cpp
+    AbstractTexture.cpp
+    CubeMapTexture.cpp
     Mesh.cpp
     MeshView.cpp
     PixelFormat.cpp

src/Magnum/GL/CubeMapTexture.cpp

@@ -85,6 +85,20 @@ Image3D CubeMapTexture::image(const Int level, Image3D&& image) {
     return std::move(image);
 }
 
+void CubeMapTexture::image(const Int level, MutableImageView3D& image) {
+    #ifndef CORRADE_NO_ASSERT
+    const Vector3i size{imageSize(level), 6};
+    CORRADE_ASSERT(image.data().data() != nullptr,
+        "GL::CubeMapTexture::image(): image view is nullptr", );
+    CORRADE_ASSERT(image.size() == size,
+        "GL::CubeMapTexture::image(): expected image view size" << size << "but got" << image.size(), );
+    #endif
+
+    Buffer::unbindInternal(Buffer::TargetHint::PixelPack);
+    Context::current().state().renderer->applyPixelStoragePack(image.storage());
+    glGetTextureImage(_id, level, GLenum(pixelFormat(image.format())), GLenum(pixelType(image.format(), image.formatExtra())), image.data().size(), image.data());
+}
+
 void CubeMapTexture::image(const Int level, BufferImage3D& image, const BufferUsage usage) {
     createIfNotAlready();
 
@@ -140,6 +154,40 @@ CompressedImage3D CubeMapTexture::compressedImage(const Int level, CompressedIma
     return std::move(image);
 }
 
+void CubeMapTexture::compressedImage(const Int level, MutableCompressedImageView3D& image) {
+    #ifndef CORRADE_NO_ASSERT
+    CORRADE_ASSERT(image.data().data() != nullptr,
+        "GL::CubeMapTexture::compressedImage(): image view is nullptr", );
+
+    const Vector3i size{imageSize(level), 6};
+
+    CORRADE_ASSERT(image.size() == size,
+        "GL::CubeMapTexture::compressedImage(): expected image view size" << size << "but got" << image.size(), );
+
+    /* If the user-provided pixel storage doesn't tell us all properties about
+       the compression, we need to ask GL for it */
+    std::pair<std::size_t, std::size_t> dataOffsetSize;
+    if(!image.storage().compressedBlockSize().product() || !image.storage().compressedBlockDataSize()) {
+        dataOffsetSize.first = 0;
+        dataOffsetSize.second = (this->*Context::current().state().texture->getCubeLevelCompressedImageSizeImplementation)(level)*6;
+    } else dataOffsetSize = Magnum::Implementation::compressedImageDataOffsetSizeFor(image, size);
+
+    CORRADE_ASSERT(image.data().size() == dataOffsetSize.first + dataOffsetSize.second,
+        "GL::CubeMapTexture::compressedImage(): expected image view data size" << dataOffsetSize.first + dataOffsetSize.second << "bytes but got" << image.data().size(), );
+
+    /* Internal texture format */
+    GLint format;
+    (this->*Context::current().state().texture->getCubeLevelParameterivImplementation)(level, GL_TEXTURE_INTERNAL_FORMAT, &format);
+
+    CORRADE_ASSERT(compressedPixelFormat(image.format()) == CompressedPixelFormat(format),
+        "GL::CubeMapTexture::compressedImage(): expected image view format" << CompressedPixelFormat(format) << "but got" << compressedPixelFormat(image.format()), );
+    #endif
+
+    Buffer::unbindInternal(Buffer::TargetHint::PixelPack);
+    Context::current().state().renderer->applyPixelStoragePack(image.storage());
+    (this->*Context::current().state().texture->getFullCompressedCubeImageImplementation)(level, size.xy(), dataOffsetSize.first, dataOffsetSize.second, image.data());
+}
+
 void CubeMapTexture::compressedImage(const Int level, CompressedBufferImage3D& image, const BufferUsage usage) {
     createIfNotAlready();
 
@@ -193,6 +241,20 @@ Image2D CubeMapTexture::image(const CubeMapCoordinate coordinate, const Int leve
     return std::move(image);
 }
 
+void CubeMapTexture::image(const CubeMapCoordinate coordinate, const Int level, MutableImageView2D& image) {
+    #ifndef CORRADE_NO_ASSERT
+    const Vector2i size = imageSize(level);
+    CORRADE_ASSERT(image.data().data() != nullptr,
+        "GL::CubeMapTexture::image(): image view is nullptr", );
+    CORRADE_ASSERT(image.size() == size,
+        "GL::CubeMapTexture::image(): expected image view size" << size << "but got" << image.size(), );
+    #endif
+
+    Buffer::unbindInternal(Buffer::TargetHint::PixelPack);
+    Context::current().state().renderer->applyPixelStoragePack(image.storage());
+    (this->*Context::current().state().texture->getCubeImageImplementation)(coordinate, level, size, pixelFormat(image.format()), pixelType(image.format(), image.formatExtra()), image.data().size(), image.data());
+}
+
 void CubeMapTexture::image(const CubeMapCoordinate coordinate, const Int level, BufferImage2D& image, const BufferUsage usage) {
     const Vector2i size = imageSize(level);
     const std::size_t dataSize = Magnum::Implementation::imageDataSizeFor(image, size);
@@ -246,6 +308,42 @@ CompressedImage2D CubeMapTexture::compressedImage(const CubeMapCoordinate coordi
     return std::move(image);
 }
 
+void CubeMapTexture::compressedImage(const CubeMapCoordinate coordinate, const Int level, MutableCompressedImageView2D& image) {
+    #ifndef CORRADE_NO_ASSERT
+    CORRADE_ASSERT(image.data().data() != nullptr,
+        "GL::CubeMapTexture::compressedImage(): image view is nullptr", );
+
+    const Vector2i size = imageSize(level);
+
+    CORRADE_ASSERT(image.size() == size,
+        "GL::CubeMapTexture::compressedImage(): expected image view size" << size << "but got" << image.size(), );
+
+    /* If the user-provided pixel storage doesn't tell us all properties about
+       the compression, we need to ask GL for it */
+    std::size_t dataSize;
+    if(!image.storage().compressedBlockSize().product() || !image.storage().compressedBlockDataSize())
+        dataSize = (this->*Context::current().state().texture->getCubeLevelCompressedImageSizeImplementation)(level);
+    else
+        dataSize = Magnum::Implementation::compressedImageDataSizeFor(image, size);
+
+    CORRADE_ASSERT(image.data().size() == dataSize,
+        "GL::CubeMapTexture::compressedImage(): expected image view data size" << dataSize << "bytes but got" << image.data().size(), );
+
+    /* Internal texture format. Zero-init to avoid an assert about value
+       already wrapped in compressedPixelFormatWrap() later if the drivers are
+       extra shitty (Intel Windows drivers, I'm talking about you). */
+    GLint format{};
+    (this->*Context::current().state().texture->getCubeLevelParameterivImplementation)(level, GL_TEXTURE_INTERNAL_FORMAT, &format);
+
+    CORRADE_ASSERT(compressedPixelFormat(image.format()) == CompressedPixelFormat(format),
+        "GL::CubeMapTexture::compressedImage(): expected image view format" << CompressedPixelFormat(format) << "but got" << compressedPixelFormat(image.format()), );
+    #endif
+
+    Buffer::unbindInternal(Buffer::TargetHint::PixelPack);
+    Context::current().state().renderer->applyPixelStoragePack(image.storage());
+    (this->*Context::current().state().texture->getCompressedCubeImageImplementation)(coordinate, level, size, image.data().size(), image.data());
+}
+
 void CubeMapTexture::compressedImage(const CubeMapCoordinate coordinate, const Int level, CompressedBufferImage2D& image, const BufferUsage usage) {
     const Vector2i size = imageSize(level);
 
@@ -322,6 +420,41 @@ CompressedImage3D CubeMapTexture::compressedSubImage(const Int level, const Rang
     return std::move(image);
 }
 
+void CubeMapTexture::compressedSubImage(const Int level, const Range3Di& range, MutableCompressedImageView3D& image) {
+    #ifndef CORRADE_NO_ASSERT
+    CORRADE_ASSERT(image.data().data() != nullptr,
+        "GL::CubeMapTexture::compressedSubImage(): image view is nullptr", );
+    CORRADE_ASSERT(image.size() == range.size(),
+        "GL::CubeMapTexture::compressedSubImage(): expected image view size" << range.size() << "but got" << image.size(), );
+
+    createIfNotAlready();
+
+    /* Internal texture format. Zero-init to avoid an assert about value
+       already wrapped in compressedPixelFormatWrap() later if the drivers are
+       extra shitty (Intel Windows drivers, I'm talking about you). */
+    GLint format{};
+    (this->*Context::current().state().texture->getCubeLevelParameterivImplementation)(level, GL_TEXTURE_INTERNAL_FORMAT, &format);
+
+    CORRADE_ASSERT(compressedPixelFormat(image.format()) == CompressedPixelFormat(format),
+        "GL::CubeMapTexture::compressedSubImage(): expected image view format" << CompressedPixelFormat(format) << "but got" << compressedPixelFormat(image.format()), );
+
+    /* Calculate compressed subimage size. If the user-provided pixel storage
+       doesn't tell us all properties about the compression, we need to ask GL
+       for it. That requires GL_ARB_internalformat_query2. */
+    std::size_t dataSize;
+    if(!image.storage().compressedBlockSize().product() || !image.storage().compressedBlockDataSize())
+        dataSize = compressedSubImageSize<3>(TextureFormat(format), range.size());
+    else dataSize = Magnum::Implementation::compressedImageDataSizeFor(image, range.size());
+
+    CORRADE_ASSERT(image.data().size() == dataSize,
+        "GL::CubeMapTexture::compressedSubImage(): expected image view data size" << dataSize << "bytes but got" << image.data().size(), );
+    #endif
+
+    Buffer::unbindInternal(Buffer::TargetHint::PixelPack);
+    Context::current().state().renderer->applyPixelStoragePack(image.storage());
+    glGetCompressedTextureSubImage(_id, level, range.min().x(), range.min().y(), range.min().z(), range.size().x(), range.size().y(), range.size().z(), image.data().size(), image.data());
+}
+
 void CubeMapTexture::compressedSubImage(const Int level, const Range3Di& range, CompressedBufferImage3D& image, const BufferUsage usage) {
     createIfNotAlready();
 

src/Magnum/GL/CubeMapTexture.h

@@ -565,6 +565,15 @@ class MAGNUM_GL_EXPORT CubeMapTexture: public AbstractTexture {
          */
         Image3D image(Int level, Image3D&& image);
 
+        /**
+         * @brief Read given texture mip level to an image view
+         *
+         * Compared to @ref image(Int, Image3D&) the function reads the pixels
+         * into the memory provided by @p image, expecting it's not
+         * @cpp nullptr @ce and its size is the same as size of given @p level.
+         */
+        void image(Int level, MutableImageView3D& image);
+
         /**
          * @brief Read given texture mip level to a buffer image
          *
@@ -614,6 +623,16 @@ class MAGNUM_GL_EXPORT CubeMapTexture: public AbstractTexture {
          */
         CompressedImage3D compressedImage(Int level, CompressedImage3D&& image);
 
+        /**
+         * @brief Read given compressed texture mip level to an image view
+         *
+         * Compared to @ref compressedImage(Int, CompressedImage3D&) the
+         * function reads the pixels into the memory provided by @p image,
+         * expecting it's not @cpp nullptr @ce, its format is the same as
+         * texture format and its size is the same as size of given @p level.
+         */
+        void compressedImage(Int level, MutableCompressedImageView3D& image);
+
         /**
          * @brief Read given compressed texture mip level to a buffer image
          *
@@ -671,6 +690,16 @@ class MAGNUM_GL_EXPORT CubeMapTexture: public AbstractTexture {
          */
         Image2D image(CubeMapCoordinate coordinate, Int level, Image2D&& image);
 
+        /**
+         * @brief Read given texture mip level and coordinate to an image view
+         *
+         * Compared to @ref image(CubeMapCoordinate, Int, Image2D&) the
+         * function reads the pixels into the memory provided by @p image,
+         * expecting it's not @cpp nullptr @ce and its size is the same as size
+         * of given @p level.
+         */
+        void image(CubeMapCoordinate coordinate, Int level, MutableImageView2D& image);
+
         /**
          * @brief Read given texture mip level and coordinate to a buffer image
          *
@@ -727,6 +756,16 @@ class MAGNUM_GL_EXPORT CubeMapTexture: public AbstractTexture {
          */
         CompressedImage2D compressedImage(CubeMapCoordinate coordinate, Int level, CompressedImage2D&& image);
 
+        /**
+         * @brief Read given compressed texture mip level to an image view
+         *
+         * Compared to @ref compressedImage(CubeMapCoordinate, Int, CompressedImage2D&)
+         * the function reads the pixels into the memory provided by @p image,
+         * expecting it's not @cpp nullptr @ce, its format is the same as
+         * texture format and its size is the same as size of given @p level.
+         */
+        void compressedImage(CubeMapCoordinate coordinate, Int level, MutableCompressedImageView2D& image);
+
         /**
          * @brief Read given compressed texture mip level and coordinate to a buffer image
          *
@@ -772,6 +811,18 @@ class MAGNUM_GL_EXPORT CubeMapTexture: public AbstractTexture {
          */
         Image3D subImage(Int level, const Range3Di& range, Image3D&& image);
 
+        /**
+         * @brief Read a range of given texture mip level to an image view
+         *
+         * Compared to @ref subImage(Int, const Range3Di&, Image3D&) the
+         * function reads the pixels into the memory provided by @p image,
+         * expecting it's not @cpp nullptr @ce and its size is the same as
+         * @p range size.
+         */
+        void subImage(Int level, const Range3Di& range, MutableImageView3D& image) {
+            AbstractTexture::subImage<3>(level, range, image);
+        }
+
         /**
          * @brief Read a range of given texture mip level to a buffer image
          *
@@ -820,6 +871,16 @@ class MAGNUM_GL_EXPORT CubeMapTexture: public AbstractTexture {
          */
         CompressedImage3D compressedSubImage(Int level, const Range3Di& range, CompressedImage3D&& image);
 
+        /**
+         * @brief Read a range of given compressed texture mip level to an image view
+         *
+         * Compared to @ref compressedSubImage(Int, const Range3Di&, CompressedImage3D&)
+         * the function reads the pixels into the memory provided by @p image,
+         * expecting it's not @cpp nullptr @ce, its format is the same as
+         * texture format and its size is the same as @p range size.
+         */
+        void compressedSubImage(Int level, const Range3Di& range, MutableCompressedImageView3D& image);
+
         /**
          * @brief Read a range of given compressed texture mip level to a buffer image
          *

src/Magnum/GL/CubeMapTextureArray.h

@@ -485,6 +485,17 @@ class MAGNUM_GL_EXPORT CubeMapTextureArray: public AbstractTexture {
          */
         Image3D image(Int level, Image3D&& image);
 
+        /**
+         * @brief Read given texture mip level to an image view
+         *
+         * Compared to @ref image(Int, Image3D&) the function reads the pixels
+         * into the memory provided by @p image, expecting it's not
+         * @cpp nullptr @ce and its size is the same as size of given @p level.
+         */
+        void image(Int level, MutableImageView3D& image) {
+            AbstractTexture::image<3>(level, image);
+        }
+
         /**
          * @brief Read given texture mip level to a buffer image
          *
@@ -529,6 +540,18 @@ class MAGNUM_GL_EXPORT CubeMapTextureArray: public AbstractTexture {
          */
         CompressedImage3D compressedImage(Int level, CompressedImage3D&& image);
 
+        /**
+         * @brief Read given compressed texture mip level to an image view
+         *
+         * Compared to @ref compressedImage(Int, CompressedImage3D&) the
+         * function reads the pixels into the memory provided by @p image,
+         * expecting it's not @cpp nullptr @ce, its format is the same as
+         * texture format and its size is the same as size of given @p level.
+         */
+        void compressedImage(Int level, MutableCompressedImageView3D& image) {
+            AbstractTexture::compressedImage<3>(level, image);
+        }
+
         /**
          * @brief Read given compressed texture mip level to a buffer image
          *
@@ -574,6 +597,18 @@ class MAGNUM_GL_EXPORT CubeMapTextureArray: public AbstractTexture {
          */
         Image3D subImage(Int level, const Range3Di& range, Image3D&& image);
 
+        /**
+         * @brief Read a range of given texture mip level to an image view
+         *
+         * Compared to @ref subImage(Int, const Range3Di&, Image3D&) the
+         * function reads the pixels into the memory provided by @p image,
+         * expecting it's not @cpp nullptr @ce and its size is the same as
+         * @p range size.
+         */
+        void subImage(Int level, const Range3Di& range, MutableImageView3D& image) {
+            AbstractTexture::subImage<3>(level, range, image);
+        }
+
         /**
          * @brief Read a range of given texture mip level to a buffer image
          *
@@ -624,6 +659,18 @@ class MAGNUM_GL_EXPORT CubeMapTextureArray: public AbstractTexture {
          */
         CompressedImage3D compressedSubImage(Int level, const Range3Di& range, CompressedImage3D&& image);
 
+        /**
+         * @brief Read a range of given compressed texture mip level to an image view
+         *
+         * Compared to @ref compressedSubImage(Int, const Range3Di&, CompressedImage3D&)
+         * the function reads the pixels into the memory provided by @p image,
+         * expecting it's not @cpp nullptr @ce, its format is the same as
+         * texture format and its size is the same as @p range size.
+         */
+        void compressedSubImage(Int level, const Range3Di& range, MutableCompressedImageView3D& image) {
+            AbstractTexture::compressedSubImage<3>(level, range, image);
+        }
+
         /**
          * @brief Read a range of given compressed texture mip level to a buffer image
          *

src/Magnum/GL/RectangleTexture.h

@@ -369,6 +369,17 @@ class MAGNUM_GL_EXPORT RectangleTexture: public AbstractTexture {
          */
         Image2D image(Image2D&& image);
 
+        /**
+         * @brief Read texture to an image view
+         *
+         * Compared to @ref image(Image2D&) the function reads the pixels into
+         * the memory provided by @p image, expecting it's not @cpp nullptr @ce
+         * and its size is the same as texture size.
+         */
+        void image(MutableImageView2D& image) {
+            AbstractTexture::image<2>(0, image);
+        }
+
         /**
          * @brief Read texture to a buffer image
          *
@@ -407,6 +418,18 @@ class MAGNUM_GL_EXPORT RectangleTexture: public AbstractTexture {
          */
         CompressedImage2D compressedImage(CompressedImage2D&& image);
 
+        /**
+         * @brief Read compressed texture to an image view
+         *
+         * Compared to @ref compressedImage(CompressedImage2D&) the function
+         * reads the pixels into the memory provided by @p image, expecting
+         * it's not @cpp nullptr @ce, its format is the same as texture format
+         * and its size is the same as texture size.
+         */
+        void compressedImage(MutableCompressedImageView2D& image) {
+            AbstractTexture::compressedImage<2>(0, image);
+        }
+
         /**
          * @brief Read compressed texture to a buffer image
          *
@@ -446,6 +469,17 @@ class MAGNUM_GL_EXPORT RectangleTexture: public AbstractTexture {
          */
         Image2D subImage(const Range2Di& range, Image2D&& image);
 
+        /**
+         * @brief Read a range of given texture mip level to an image view
+         *
+         * Compared to @ref subImage(const Range2Di&, Image2D&) the function
+         * reads the pixels into the memory provided by @p image, expecting
+         * it's not @cpp nullptr @ce and its size is the same as @p range size.
+         */
+        void subImage(const Range2Di& range, MutableImageView2D& image) {
+            AbstractTexture::subImage<2>(0, range, image);
+        }
+
         /**
          * @brief Read a texture range to a buffer image
          *
@@ -490,6 +524,18 @@ class MAGNUM_GL_EXPORT RectangleTexture: public AbstractTexture {
          */
         CompressedImage2D compressedSubImage(const Range2Di& range, CompressedImage2D&& image);
 
+        /**
+         * @brief Read a compressed texture range to an image view
+         *
+         * Compared to @ref compressedSubImage(const Range2Di&, CompressedImage2D&)
+         * the function reads the pixels into the memory provided by @p image,
+         * expecting it's not @cpp nullptr @ce, its format is the same as
+         * texture format and its size is the same as @p range size.
+         */
+        void compressedSubImage(const Range2Di& range, MutableCompressedImageView2D& image) {
+            AbstractTexture::compressedSubImage<2>(0, range, image);
+        }
+
         /**
          * @brief Read a compressed texture range to a buffer image
          *

src/Magnum/GL/Test/AbstractTextureGLTest.cpp

@@ -23,12 +23,17 @@
     DEALINGS IN THE SOFTWARE.
 */
 
+#include <sstream>
 #include <Corrade/Utility/DebugStl.h>
 
+#include "Magnum/ImageView.h"
 #include "Magnum/GL/Context.h"
 #include "Magnum/GL/Extensions.h"
+#include "Magnum/GL/PixelFormat.h"
 #include "Magnum/GL/Texture.h"
+#include "Magnum/GL/TextureFormat.h"
 #include "Magnum/GL/OpenGLTester.h"
+#include "Magnum/Math/Range.h"
 
 namespace Magnum { namespace GL { namespace Test { namespace {
 
@@ -38,6 +43,22 @@ struct AbstractTextureGLTest: OpenGLTester {
     void construct();
     void constructMove();
 
+    #ifndef MAGNUM_TARGET_GLES
+    void imageQueryViewNullptr();
+    void imageQueryViewBadSize();
+    void subImageQueryViewNullptr();
+    void subImageQueryViewBadSize();
+
+    void compressedImageQueryViewNullptr();
+    void compressedImageQueryViewBadSize();
+    void compressedImageQueryViewBadDataSize();
+    void compressedImageQueryViewBadFormat();
+    void compressedSubImageQueryViewNullptr();
+    void compressedSubImageQueryViewBadSize();
+    void compressedSubImageQueryViewBadDataSize();
+    void compressedSubImageQueryViewBadFormat();
+    #endif
+
     #ifndef MAGNUM_TARGET_WEBGL
     void label();
     #endif
@@ -47,6 +68,22 @@ AbstractTextureGLTest::AbstractTextureGLTest() {
     addTests({&AbstractTextureGLTest::construct,
               &AbstractTextureGLTest::constructMove,
 
+              #ifndef MAGNUM_TARGET_GLES
+              &AbstractTextureGLTest::imageQueryViewNullptr,
+              &AbstractTextureGLTest::imageQueryViewBadSize,
+              &AbstractTextureGLTest::subImageQueryViewNullptr,
+              &AbstractTextureGLTest::subImageQueryViewBadSize,
+
+              &AbstractTextureGLTest::compressedImageQueryViewNullptr,
+              &AbstractTextureGLTest::compressedImageQueryViewBadSize,
+              &AbstractTextureGLTest::compressedImageQueryViewBadDataSize,
+              &AbstractTextureGLTest::compressedImageQueryViewBadFormat,
+              &AbstractTextureGLTest::compressedSubImageQueryViewNullptr,
+              &AbstractTextureGLTest::compressedSubImageQueryViewBadSize,
+              &AbstractTextureGLTest::compressedSubImageQueryViewBadDataSize,
+              &AbstractTextureGLTest::compressedSubImageQueryViewBadFormat,
+              #endif
+
               #ifndef MAGNUM_TARGET_WEBGL
               &AbstractTextureGLTest::label
               #endif
@@ -86,6 +123,227 @@ void AbstractTextureGLTest::constructMove() {
     CORRADE_COMPARE(c.id(), id);
 }
 
+#ifndef MAGNUM_TARGET_GLES
+void AbstractTextureGLTest::imageQueryViewNullptr() {
+    Texture2D texture;
+    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{2});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    MutableImageView2D image{PixelFormat::RGBA, PixelType::UnsignedByte, Vector2i{2}, {nullptr, 2*2*4}};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.image(0, image);
+    CORRADE_COMPARE(out.str(), "GL::AbstractTexture::image(): image view is nullptr\n");
+}
+
+void AbstractTextureGLTest::imageQueryViewBadSize() {
+    Texture2D texture;
+    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{2});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    char data[2*4];
+    MutableImageView2D image{PixelFormat::RGBA, PixelType::UnsignedByte, Vector2i{2, 1}, data};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.image(0, image);
+    CORRADE_COMPARE(out.str(), "GL::AbstractTexture::image(): expected image view size Vector(2, 2) but got Vector(2, 1)\n");
+}
+
+void AbstractTextureGLTest::subImageQueryViewNullptr() {
+    Texture2D texture;
+    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{2});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    MutableImageView2D image{PixelFormat::RGBA, PixelType::UnsignedByte, Vector2i{2}, {nullptr, 2*2*4}};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.subImage(0, {{}, Vector2i{2}}, image);
+    CORRADE_COMPARE(out.str(), "GL::AbstractTexture::subImage(): image view is nullptr\n");
+}
+
+void AbstractTextureGLTest::subImageQueryViewBadSize() {
+    if(!Context::current().isExtensionSupported<Extensions::ARB::get_texture_sub_image>())
+        CORRADE_SKIP(Extensions::ARB::get_texture_sub_image::string() + std::string(" is not supported."));
+
+    Texture2D texture;
+    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{2});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    char data[2*4];
+    MutableImageView2D image{PixelFormat::RGBA, PixelType::UnsignedByte, Vector2i{2, 1}, data};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.subImage(0, {{}, Vector2i{2}}, image);
+    CORRADE_COMPARE(out.str(), "GL::AbstractTexture::subImage(): expected image view size Vector(2, 2) but got Vector(2, 1)\n");
+}
+
+void AbstractTextureGLTest::compressedImageQueryViewNullptr() {
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+
+    Texture2D texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{4});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    MutableCompressedImageView2D image{CompressedPixelFormat::RGBAS3tcDxt3, Vector2i{4}, {nullptr, 16}};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.compressedImage(0, image);
+    CORRADE_COMPARE(out.str(), "GL::AbstractTexture::compressedImage(): image view is nullptr\n");
+}
+
+void AbstractTextureGLTest::compressedImageQueryViewBadSize() {
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+
+    Texture2D texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{4});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    char data[2*16];
+    MutableCompressedImageView2D image{CompressedPixelFormat::RGBAS3tcDxt3, Vector2i{4, 8}, data};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.compressedImage(0, image);
+    CORRADE_COMPARE(out.str(), "GL::AbstractTexture::compressedImage(): expected image view size Vector(4, 4) but got Vector(4, 8)\n");
+}
+
+void AbstractTextureGLTest::compressedImageQueryViewBadDataSize() {
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+
+    Texture2D texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{4});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    char data[16 - 1];
+    MutableCompressedImageView2D image{CompressedPixelFormat::RGBAS3tcDxt3, Vector2i{4}, data};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.compressedImage(0, image);
+    CORRADE_COMPARE(out.str(), "GL::AbstractTexture::compressedImage(): expected image view data size 16 bytes but got 15\n");
+}
+
+void AbstractTextureGLTest::compressedImageQueryViewBadFormat() {
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+
+    Texture2D texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{4});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    char data[16];
+    MutableCompressedImageView2D image{CompressedPixelFormat::RGBAS3tcDxt1, Vector2i{4}, data};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.compressedImage(0, image);
+    CORRADE_COMPARE(out.str(), "GL::AbstractTexture::compressedImage(): expected image view format GL::CompressedPixelFormat::RGBAS3tcDxt3 but got GL::CompressedPixelFormat::RGBAS3tcDxt1\n");
+}
+
+void AbstractTextureGLTest::compressedSubImageQueryViewNullptr() {
+    if(!Context::current().isExtensionSupported<Extensions::ARB::get_texture_sub_image>())
+        CORRADE_SKIP(Extensions::ARB::get_texture_sub_image::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::ARB::internalformat_query2>())
+        CORRADE_SKIP(Extensions::ARB::internalformat_query2::string() + std::string(" is not supported."));
+
+    Texture2D texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{4});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    MutableCompressedImageView2D image{CompressedPixelFormat::RGBAS3tcDxt3, Vector2i{4}, {nullptr, 16}};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.compressedSubImage(0, {{}, Vector2i{4}}, image);
+    CORRADE_COMPARE(out.str(), "GL::AbstractTexture::compressedSubImage(): image view is nullptr\n");
+}
+
+void AbstractTextureGLTest::compressedSubImageQueryViewBadSize() {
+    if(!Context::current().isExtensionSupported<Extensions::ARB::get_texture_sub_image>())
+        CORRADE_SKIP(Extensions::ARB::get_texture_sub_image::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::ARB::internalformat_query2>())
+        CORRADE_SKIP(Extensions::ARB::internalformat_query2::string() + std::string(" is not supported."));
+
+    Texture2D texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{4});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    char data[2*16];
+    MutableCompressedImageView2D image{CompressedPixelFormat::RGBAS3tcDxt3, Vector2i{4, 8}, data};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.compressedSubImage(0, {{}, Vector2i{4}}, image);
+    CORRADE_COMPARE(out.str(), "GL::AbstractTexture::compressedSubImage(): expected image view size Vector(4, 4) but got Vector(4, 8)\n");
+}
+
+void AbstractTextureGLTest::compressedSubImageQueryViewBadDataSize() {
+    if(!Context::current().isExtensionSupported<Extensions::ARB::get_texture_sub_image>())
+        CORRADE_SKIP(Extensions::ARB::get_texture_sub_image::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::ARB::internalformat_query2>())
+        CORRADE_SKIP(Extensions::ARB::internalformat_query2::string() + std::string(" is not supported."));
+
+    Texture2D texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{4});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    char data[16 - 1];
+    MutableCompressedImageView2D image{CompressedPixelFormat::RGBAS3tcDxt3, Vector2i{4}, data};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.compressedSubImage(0, {{}, Vector2i{4}}, image);
+    CORRADE_COMPARE(out.str(), "GL::AbstractTexture::compressedSubImage(): expected image view data size 16 bytes but got 15\n");
+}
+
+void AbstractTextureGLTest::compressedSubImageQueryViewBadFormat() {
+    if(!Context::current().isExtensionSupported<Extensions::ARB::get_texture_sub_image>())
+        CORRADE_SKIP(Extensions::ARB::get_texture_sub_image::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::ARB::internalformat_query2>())
+        CORRADE_SKIP(Extensions::ARB::internalformat_query2::string() + std::string(" is not supported."));
+
+    Texture2D texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{4});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    char data[16];
+    MutableCompressedImageView2D image{CompressedPixelFormat::RGBAS3tcDxt1, Vector2i{4}, data};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.compressedSubImage(0, {{}, Vector2i{4}}, image);
+    CORRADE_COMPARE(out.str(), "GL::AbstractTexture::compressedSubImage(): expected image view format GL::CompressedPixelFormat::RGBAS3tcDxt3 but got GL::CompressedPixelFormat::RGBAS3tcDxt1\n");
+}
+#endif
+
 #ifndef MAGNUM_TARGET_WEBGL
 void AbstractTextureGLTest::label() {
     /* No-Op version is tested in AbstractObjectGLTest */

src/Magnum/GL/Test/CMakeLists.txt

@@ -104,14 +104,14 @@ if(NOT MAGNUM_TARGET_GLES)
 endif()
 
 if(BUILD_GL_TESTS)
-    corrade_add_test(GLAbstractTextureGLTest AbstractTextureGLTest.cpp LIBRARIES MagnumOpenGLTester)
+    corrade_add_test(GLAbstractTextureGLTest AbstractTextureGLTest.cpp LIBRARIES MagnumOpenGLTesterTestLib)
     corrade_add_test(GLBufferGLTest BufferGLTest.cpp LIBRARIES MagnumOpenGLTester)
-    corrade_add_test(GLCubeMapTextureGLTest CubeMapTextureGLTest.cpp LIBRARIES MagnumOpenGLTester)
+    corrade_add_test(GLCubeMapTextureGLTest CubeMapTextureGLTest.cpp LIBRARIES MagnumOpenGLTesterTestLib)
-    corrade_add_test(GLFramebufferGLTest FramebufferGLTest.cpp LIBRARIES MagnumOpenGLTester)
+    corrade_add_test(GLFramebufferGLTest FramebufferGLTest.cpp LIBRARIES MagnumOpenGLTesterTestLib)
     corrade_add_test(GLMeshGLTest MeshGLTest.cpp LIBRARIES MagnumOpenGLTesterTestLib)
     corrade_add_test(GLRendererGLTest RendererGLTest.cpp LIBRARIES MagnumOpenGLTester)
     corrade_add_test(GLRenderbufferGLTest RenderbufferGLTest.cpp LIBRARIES MagnumOpenGLTester)
-    corrade_add_test(GLTextureGLTest TextureGLTest.cpp LIBRARIES MagnumOpenGLTester)
+    corrade_add_test(GLTextureGLTest TextureGLTest.cpp LIBRARIES MagnumOpenGLTesterTestLib)
 
     corrade_add_resource(GLAbstractShaderProgramGLTest_RES AbstractShaderProgramGLTestFiles/resources.conf)
     corrade_add_test(GLAbstractShaderProgramGLTest

src/Magnum/GL/Test/CubeMapTextureArrayGLTest.cpp

@@ -62,20 +62,30 @@ struct CubeMapTextureArrayGLTest: OpenGLTester {
 
     void image();
     void imageBuffer();
+    #ifndef MAGNUM_TARGET_GLES
+    void imageQueryView();
+    #endif
     void subImage();
     void subImageBuffer();
     #ifndef MAGNUM_TARGET_GLES
     void subImageQuery();
+    void subImageQueryView();
     void subImageQueryBuffer();
+    /* View query assertions tested in AbstractTextureGLTest */
     #endif
 
     void compressedImage();
     void compressedImageBuffer();
+    #ifndef MAGNUM_TARGET_GLES
+    void compressedImageQueryView();
+    #endif
     void compressedSubImage();
     void compressedSubImageBuffer();
     #ifndef MAGNUM_TARGET_GLES
     void compressedSubImageQuery();
+    void compressedSubImageQueryView();
     void compressedSubImageQueryBuffer();
+    /* View query assertions tested in AbstractTextureGLTest */
     #endif
 
     void generateMipmap();
@@ -274,28 +284,36 @@ CubeMapTextureArrayGLTest::CubeMapTextureArrayGLTest() {
 
     addInstancedTests({
         &CubeMapTextureArrayGLTest::image,
-        &CubeMapTextureArrayGLTest::imageBuffer},
+        &CubeMapTextureArrayGLTest::imageBuffer,
-        Containers::arraySize(PixelStorageData));
+        #ifndef MAGNUM_TARGET_GLES
+        &CubeMapTextureArrayGLTest::imageQueryView
+        #endif
+        }, Containers::arraySize(PixelStorageData));
 
     addInstancedTests({
         &CubeMapTextureArrayGLTest::subImage,
         &CubeMapTextureArrayGLTest::subImageBuffer,
         #ifndef MAGNUM_TARGET_GLES
         &CubeMapTextureArrayGLTest::subImageQuery,
+        &CubeMapTextureArrayGLTest::subImageQueryView,
         &CubeMapTextureArrayGLTest::subImageQueryBuffer
         #endif
         }, Containers::arraySize(SubPixelStorageData));
 
     addInstancedTests({
         &CubeMapTextureArrayGLTest::compressedImage,
-        &CubeMapTextureArrayGLTest::compressedImageBuffer},
+        &CubeMapTextureArrayGLTest::compressedImageBuffer,
-        Containers::arraySize(CompressedPixelStorageData));
+        #ifndef MAGNUM_TARGET_GLES
+        &CubeMapTextureArrayGLTest::compressedImageQueryView
+        #endif
+        }, Containers::arraySize(CompressedPixelStorageData));
 
     addInstancedTests({
         &CubeMapTextureArrayGLTest::compressedSubImage,
         &CubeMapTextureArrayGLTest::compressedSubImageBuffer,
         #ifndef MAGNUM_TARGET_GLES
         &CubeMapTextureArrayGLTest::compressedSubImageQuery,
+        &CubeMapTextureArrayGLTest::compressedSubImageQueryView,
         &CubeMapTextureArrayGLTest::compressedSubImageQueryBuffer,
         #endif
         }, Containers::arraySize(CompressedSubPixelStorageData));
@@ -627,6 +645,34 @@ void CubeMapTextureArrayGLTest::imageBuffer() {
     #endif
 }
 
+#ifndef MAGNUM_TARGET_GLES
+void CubeMapTextureArrayGLTest::imageQueryView() {
+    setTestCaseDescription(PixelStorageData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::ARB::texture_cube_map_array>())
+        CORRADE_SKIP(Extensions::ARB::texture_cube_map_array::string() + std::string(" is not supported."));
+
+    CubeMapTextureArray texture;
+    texture.setImage(0, TextureFormat::RGBA8, ImageView3D{
+        PixelStorageData[testCaseInstanceId()].storage,
+        PixelFormat::RGBA, PixelType::UnsignedByte, {2, 2, 6},
+        PixelStorageData[testCaseInstanceId()].dataSparse});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{PixelStorageData[testCaseInstanceId()].offset + 2*2*6*4};
+    MutableImageView3D image{PixelStorageData[testCaseInstanceId()].storage, PixelFormat::RGBA, PixelType::UnsignedByte, {2, 2, 6}, data};
+    texture.image(0, image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), Vector3i(2, 2, 6));
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(PixelStorageData[testCaseInstanceId()].offset),
+        PixelStorageData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+#endif
+
 void CubeMapTextureArrayGLTest::compressedImage() {
     setTestCaseDescription(CompressedPixelStorageData[testCaseInstanceId()].name);
 
@@ -710,6 +756,41 @@ void CubeMapTextureArrayGLTest::compressedImageBuffer() {
     #endif
 }
 
+#ifndef MAGNUM_TARGET_GLES
+void CubeMapTextureArrayGLTest::compressedImageQueryView() {
+    setTestCaseDescription(CompressedPixelStorageData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::ARB::texture_cube_map_array>())
+        CORRADE_SKIP(Extensions::ARB::texture_cube_map_array::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+
+    if(CompressedPixelStorageData[testCaseInstanceId()].storage != CompressedPixelStorage{} && !Context::current().isExtensionSupported<Extensions::ARB::compressed_texture_pixel_storage>())
+        CORRADE_SKIP(Extensions::ARB::compressed_texture_pixel_storage::string() + std::string(" is not supported."));
+
+    CubeMapTextureArray texture;
+    texture.setCompressedImage(0, CompressedImageView3D{
+        #ifndef MAGNUM_TARGET_GLES
+        CompressedPixelStorageData[testCaseInstanceId()].storage,
+        #endif
+        CompressedPixelFormat::RGBAS3tcDxt3, {4, 4, 6},
+        CompressedPixelStorageData[testCaseInstanceId()].dataSparse});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{CompressedPixelStorageData[testCaseInstanceId()].offset + 6*16};
+    MutableCompressedImageView3D image{CompressedPixelStorageData[testCaseInstanceId()].storage, CompressedPixelFormat::RGBAS3tcDxt3, {4, 4, 6}, data};
+    texture.compressedImage(0, image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), (Vector3i{4, 4, 6}));
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(CompressedPixelStorageData[testCaseInstanceId()].offset),
+        CompressedPixelStorageData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+#endif
+
 constexpr UnsignedByte Zero[4*4*4*6]{};
 #ifndef MAGNUM_TARGET_GLES
 constexpr UnsignedByte SubDataComplete[]{
@@ -841,6 +922,32 @@ void CubeMapTextureArrayGLTest::subImageQuery() {
         TestSuite::Compare::Container);
 }
 
+void CubeMapTextureArrayGLTest::subImageQueryView() {
+    setTestCaseDescription(SubPixelStorageData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::ARB::texture_cube_map_array>())
+        CORRADE_SKIP(Extensions::ARB::texture_cube_map_array::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::ARB::get_texture_sub_image>())
+        CORRADE_SKIP(Extensions::ARB::get_texture_sub_image::string() + std::string(" is not supported."));
+
+    CubeMapTextureArray texture;
+    texture.setStorage(1, TextureFormat::RGBA8, {4, 4, 6})
+           .setSubImage(0, {}, ImageView3D{PixelFormat::RGBA, PixelType::UnsignedByte, {4, 4, 6}, SubDataComplete});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{SubPixelStorageData[testCaseInstanceId()].offset + 2*2*4*4};
+    MutableImageView3D image{PixelStorageData[testCaseInstanceId()].storage, PixelFormat::RGBA, PixelType::UnsignedByte, {2, 2, 4}, data};
+    texture.subImage(0, Range3Di::fromSize(Vector3i{1}, {2, 2, 4}), image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), Vector3i(2, 2, 4));
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(SubPixelStorageData[testCaseInstanceId()].offset),
+        SubPixelStorageData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+
 void CubeMapTextureArrayGLTest::subImageQueryBuffer() {
     setTestCaseDescription(SubPixelStorageData[testCaseInstanceId()].name);
 
@@ -1058,6 +1165,38 @@ void CubeMapTextureArrayGLTest::compressedSubImageQuery() {
         TestSuite::Compare::Container);
 }
 
+void CubeMapTextureArrayGLTest::compressedSubImageQueryView() {
+    setTestCaseDescription(CompressedSubPixelStorageData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::ARB::texture_cube_map_array>())
+        CORRADE_SKIP(Extensions::ARB::texture_cube_map_array::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::ARB::get_texture_sub_image>())
+        CORRADE_SKIP(Extensions::ARB::get_texture_sub_image::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+    if(CompressedSubPixelStorageData[testCaseInstanceId()].storage != CompressedPixelStorage{} && !Context::current().isExtensionSupported<Extensions::ARB::compressed_texture_pixel_storage>())
+        CORRADE_SKIP(Extensions::ARB::compressed_texture_pixel_storage::string() + std::string(" is not supported."));
+    if(CompressedSubPixelStorageData[testCaseInstanceId()].storage == CompressedPixelStorage{} && !Context::current().isExtensionSupported<Extensions::ARB::internalformat_query2>())
+        CORRADE_SKIP(Extensions::ARB::internalformat_query2::string() + std::string(" is not supported."));
+
+    CubeMapTextureArray texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, {12, 12, 6})
+        .setCompressedSubImage(0, {}, CompressedImageView3D{CompressedPixelFormat::RGBAS3tcDxt3, {12, 12, 6}, CompressedSubDataComplete});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{CompressedSubPixelStorageData[testCaseInstanceId()].offset + 4*16};
+    MutableCompressedImageView3D image{CompressedPixelStorageData[testCaseInstanceId()].storage, CompressedPixelFormat::RGBAS3tcDxt3, {4, 4, 4}, data};
+    texture.compressedSubImage(0, Range3Di::fromSize({4, 4, 1}, Vector3i{4}), image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), Vector3i{4});
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(CompressedSubPixelStorageData[testCaseInstanceId()].offset),
+        CompressedSubPixelStorageData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+
 void CubeMapTextureArrayGLTest::compressedSubImageQueryBuffer() {
     setTestCaseDescription(CompressedSubPixelStorageData[testCaseInstanceId()].name);
 

src/Magnum/GL/Test/CubeMapTextureGLTest.cpp

@@ -23,7 +23,9 @@
     DEALINGS IN THE SOFTWARE.
 */
 
+#include <sstream>
 #include <Corrade/TestSuite/Compare/Container.h>
+#include <Corrade/Utility/DebugStl.h>
 
 #include "Magnum/Image.h"
 #include "Magnum/ImageView.h"
@@ -80,12 +82,20 @@ struct CubeMapTextureGLTest: OpenGLTester {
     #ifndef MAGNUM_TARGET_GLES2
     void imageBuffer();
     #endif
+    #ifndef MAGNUM_TARGET_GLES
+    void imageQueryView();
+    void imageQueryViewNullptr();
+    void imageQueryViewBadSize();
+    #endif
     void subImage();
     #ifndef MAGNUM_TARGET_GLES2
     void subImageBuffer();
     #endif
     #ifndef MAGNUM_TARGET_GLES
     void subImageQuery();
+    void subImageQueryView();
+    /* unlike all others, subImage() simply calls into AbstractTexture, so
+       all assertions are already tested in AbstractTextureGLTest */
     void subImageQueryBuffer();
     #endif
 
@@ -93,6 +103,13 @@ struct CubeMapTextureGLTest: OpenGLTester {
     #ifndef MAGNUM_TARGET_GLES2
     void compressedImageBuffer();
     #endif
+    #ifndef MAGNUM_TARGET_GLES
+    void compressedImageQueryView();
+    void compressedImageQueryViewNullptr();
+    void compressedImageQueryViewBadSize();
+    void compressedImageQueryViewBadDataSize();
+    void compressedImageQueryViewBadFormat();
+    #endif
     #if !(defined(MAGNUM_TARGET_GLES2) && defined(MAGNUM_TARGET_WEBGL))
     void immutableCompressedImage();
     #endif
@@ -102,14 +119,27 @@ struct CubeMapTextureGLTest: OpenGLTester {
     #endif
     #ifndef MAGNUM_TARGET_GLES
     void compressedSubImageQuery();
+    void compressedSubImageQueryView();
+    void compressedSubImageQueryViewNullptr();
+    void compressedSubImageQueryViewBadSize();
+    void compressedSubImageQueryViewBadDataSize();
+    void compressedSubImageQueryViewBadFormat();
     void compressedSubImageQueryBuffer();
     #endif
 
     #ifndef MAGNUM_TARGET_GLES
     void fullImageQuery();
+    void fullImageQueryView();
+    void fullImageQueryViewNullptr();
+    void fullImageQueryViewBadSize();
     void fullImageQueryBuffer();
 
     void compressedFullImageQuery();
+    void compressedFullImageQueryView();
+    void compressedFullImageQueryViewNullptr();
+    void compressedFullImageQueryViewBadSize();
+    void compressedFullImageQueryViewBadDataSize();
+    void compressedFullImageQueryViewBadFormat();
     void compressedFullImageQueryBuffer();
     #endif
 
@@ -306,13 +336,25 @@ CubeMapTextureGLTest::CubeMapTextureGLTest() {
         #ifndef MAGNUM_TARGET_GLES2
         &CubeMapTextureGLTest::imageBuffer,
         #endif
+        #ifndef MAGNUM_TARGET_GLES
+        &CubeMapTextureGLTest::imageQueryView,
+        #endif
         }, Containers::arraySize(PixelStorageData));
 
+    #ifndef MAGNUM_TARGET_GLES
+    addTests({&CubeMapTextureGLTest::imageQueryViewNullptr,
+              &CubeMapTextureGLTest::imageQueryViewBadSize});
+    #endif
+
     #ifndef MAGNUM_TARGET_GLES
     addInstancedTests({
         &CubeMapTextureGLTest::fullImageQuery,
+        &CubeMapTextureGLTest::fullImageQueryView,
         &CubeMapTextureGLTest::fullImageQueryBuffer},
         Containers::arraySize(FullPixelStorageData));
+
+    addTests({&CubeMapTextureGLTest::fullImageQueryViewNullptr,
+              &CubeMapTextureGLTest::fullImageQueryViewBadSize});
     #endif
 
     addInstancedTests({
@@ -322,6 +364,7 @@ CubeMapTextureGLTest::CubeMapTextureGLTest() {
         #endif
         #ifndef MAGNUM_TARGET_GLES
         &CubeMapTextureGLTest::subImageQuery,
+        &CubeMapTextureGLTest::subImageQueryView,
         &CubeMapTextureGLTest::subImageQueryBuffer
         #endif
         }, Containers::arraySize(PixelStorageData));
@@ -331,16 +374,30 @@ CubeMapTextureGLTest::CubeMapTextureGLTest() {
         #ifndef MAGNUM_TARGET_GLES2
         &CubeMapTextureGLTest::compressedImageBuffer,
         #endif
+        #ifndef MAGNUM_TARGET_GLES
+        &CubeMapTextureGLTest::compressedImageQueryView,
+        #endif
         #if !(defined(MAGNUM_TARGET_GLES2) && defined(MAGNUM_TARGET_WEBGL))
         &CubeMapTextureGLTest::immutableCompressedImage,
         #endif
         }, Containers::arraySize(CompressedPixelStorageData));
 
     #ifndef MAGNUM_TARGET_GLES
+    addTests({&CubeMapTextureGLTest::compressedImageQueryViewNullptr,
+              &CubeMapTextureGLTest::compressedImageQueryViewBadSize,
+              &CubeMapTextureGLTest::compressedImageQueryViewBadDataSize,
+              &CubeMapTextureGLTest::compressedImageQueryViewBadFormat});
+
     addInstancedTests({
         &CubeMapTextureGLTest::compressedFullImageQuery,
+        &CubeMapTextureGLTest::compressedFullImageQueryView,
         &CubeMapTextureGLTest::compressedFullImageQueryBuffer},
         Containers::arraySize(CompressedFullPixelStorageData));
+
+    addTests({&CubeMapTextureGLTest::compressedFullImageQueryViewNullptr,
+              &CubeMapTextureGLTest::compressedFullImageQueryViewBadSize,
+              &CubeMapTextureGLTest::compressedFullImageQueryViewBadDataSize,
+              &CubeMapTextureGLTest::compressedFullImageQueryViewBadFormat});
     #endif
 
     addInstancedTests({
@@ -350,10 +407,18 @@ CubeMapTextureGLTest::CubeMapTextureGLTest() {
         #endif
         #ifndef MAGNUM_TARGET_GLES
         &CubeMapTextureGLTest::compressedSubImageQuery,
+        &CubeMapTextureGLTest::compressedSubImageQueryView,
         &CubeMapTextureGLTest::compressedSubImageQueryBuffer
         #endif
         }, Containers::arraySize(CompressedPixelStorageData));
 
+    #ifndef MAGNUM_TARGET_GLES
+    addTests({&CubeMapTextureGLTest::compressedSubImageQueryViewNullptr,
+              &CubeMapTextureGLTest::compressedSubImageQueryViewBadSize,
+              &CubeMapTextureGLTest::compressedSubImageQueryViewBadDataSize,
+              &CubeMapTextureGLTest::compressedSubImageQueryViewBadFormat});
+    #endif
+
     addTests({&CubeMapTextureGLTest::generateMipmap,
 
               &CubeMapTextureGLTest::invalidateImage,
@@ -807,6 +872,64 @@ void CubeMapTextureGLTest::imageBuffer() {
 }
 #endif
 
+#ifndef MAGNUM_TARGET_GLES
+void CubeMapTextureGLTest::imageQueryView() {
+    setTestCaseDescription(PixelStorageData[testCaseInstanceId()].name);
+
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{2})
+        .setSubImage(CubeMapCoordinate::PositiveY, 0, {},
+        ImageView2D{PixelStorageData[testCaseInstanceId()].storage,
+        PixelFormat::RGBA, PixelType::UnsignedByte, Vector2i(2),
+        PixelStorageData[testCaseInstanceId()].dataSparse});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{PixelStorageData[testCaseInstanceId()].offset + 2*2*4};
+    MutableImageView2D image{PixelStorageData[testCaseInstanceId()].storage,
+            PixelFormat::RGBA, PixelType::UnsignedByte, Vector2i{2}, data};
+    texture.image(CubeMapCoordinate::PositiveY, 0, image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), Vector2i(2));
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(PixelStorageData[testCaseInstanceId()].offset),
+        PixelStorageData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+
+void CubeMapTextureGLTest::imageQueryViewNullptr() {
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{2});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    MutableImageView2D image{PixelFormat::RGBA, PixelType::UnsignedByte,
+        Vector2i{2}, {nullptr, 2*2*4}};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.image(CubeMapCoordinate::PositiveY, 0, image);
+    CORRADE_COMPARE(out.str(), "GL::CubeMapTexture::image(): image view is nullptr\n");
+}
+
+void CubeMapTextureGLTest::imageQueryViewBadSize() {
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{2});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    char data[2*4];
+    MutableImageView2D image{PixelFormat::RGBA, PixelType::UnsignedByte,
+        {2, 1}, data};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.image(CubeMapCoordinate::PositiveY, 0, image);
+    CORRADE_COMPARE(out.str(), "GL::CubeMapTexture::image(): expected image view size Vector(2, 2) but got Vector(2, 1)\n");
+}
+#endif
+
 #ifndef MAGNUM_TARGET_GLES
 constexpr UnsignedByte SubDataComplete[]{
     0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
@@ -932,6 +1055,31 @@ void CubeMapTextureGLTest::subImageQuery() {
         TestSuite::Compare::Container);
 }
 
+void CubeMapTextureGLTest::subImageQueryView() {
+    setTestCaseDescription(PixelStorageData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::ARB::get_texture_sub_image>())
+        CORRADE_SKIP(Extensions::ARB::get_texture_sub_image::string() + std::string(" is not supported."));
+
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{4})
+           .setSubImage(CubeMapCoordinate::PositiveX, 0, {}, ImageView2D{PixelFormat::RGBA, PixelType::UnsignedByte, {4, 4}, SubDataComplete});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{PixelStorageData[testCaseInstanceId()].offset + 2*2*4};
+    MutableImageView3D image{PixelStorageData[testCaseInstanceId()].storage,
+            PixelFormat::RGBA, PixelType::UnsignedByte, {2, 2, 1}, data};
+    texture.subImage(0, Range3Di::fromSize({1, 1, 0}, {2, 2, 1}), image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), Vector3i(2, 2, 1));
+    CORRADE_COMPARE_AS(Containers::arrayCast<const UnsignedByte>(image.data()).suffix(PixelStorageData[testCaseInstanceId()].offset),
+        PixelStorageData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+
 void CubeMapTextureGLTest::subImageQueryBuffer() {
     setTestCaseDescription(PixelStorageData[testCaseInstanceId()].name);
 
@@ -1053,6 +1201,111 @@ void CubeMapTextureGLTest::compressedImageBuffer() {
 }
 #endif
 
+#ifndef MAGNUM_TARGET_GLES
+void CubeMapTextureGLTest::compressedImageQueryView() {
+    setTestCaseDescription(CompressedPixelStorageData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+
+    if(CompressedPixelStorageData[testCaseInstanceId()].storage != CompressedPixelStorage{} && !Context::current().isExtensionSupported<Extensions::ARB::compressed_texture_pixel_storage>())
+        CORRADE_SKIP(Extensions::ARB::compressed_texture_pixel_storage::string() + std::string(" is not supported."));
+
+    const CompressedImageView2D view{
+        CompressedPixelStorageData[testCaseInstanceId()].storage,
+        CompressedPixelFormat::RGBAS3tcDxt3, Vector2i{4},
+        CompressedPixelStorageData[testCaseInstanceId()].dataSparse};
+
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{4})
+        .setCompressedSubImage(CubeMapCoordinate::PositiveZ, 0, {}, view);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{CompressedPixelStorageData[testCaseInstanceId()].offset + 16};
+    MutableCompressedImageView2D image{CompressedPixelStorageData[testCaseInstanceId()].storage, CompressedPixelFormat::RGBAS3tcDxt3, Vector2i{4}, data};
+    texture.compressedImage(CubeMapCoordinate::PositiveZ, 0, image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), Vector2i{4});
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(CompressedPixelStorageData[testCaseInstanceId()].offset),
+        CompressedPixelStorageData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+
+void CubeMapTextureGLTest::compressedImageQueryViewNullptr() {
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{4});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    MutableCompressedImageView2D image{CompressedPixelFormat::RGBAS3tcDxt3, Vector2i{4}, {nullptr, 16}};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.compressedImage(CubeMapCoordinate::PositiveX, 0, image);
+    CORRADE_COMPARE(out.str(), "GL::CubeMapTexture::compressedImage(): image view is nullptr\n");
+}
+
+void CubeMapTextureGLTest::compressedImageQueryViewBadSize() {
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{4});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    char data[2*16];
+    MutableCompressedImageView2D image{CompressedPixelFormat::RGBAS3tcDxt3, Vector2i{4, 8}, data};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.compressedImage(CubeMapCoordinate::PositiveX, 0, image);
+    CORRADE_COMPARE(out.str(), "GL::CubeMapTexture::compressedImage(): expected image view size Vector(4, 4) but got Vector(4, 8)\n");
+}
+
+void CubeMapTextureGLTest::compressedImageQueryViewBadDataSize() {
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{4});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    char data[16 - 1];
+    MutableCompressedImageView2D image{CompressedPixelFormat::RGBAS3tcDxt3, Vector2i{4}, data};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.compressedImage(CubeMapCoordinate::PositiveX, 0, image);
+    CORRADE_COMPARE(out.str(), "GL::CubeMapTexture::compressedImage(): expected image view data size 16 bytes but got 15\n");
+}
+
+void CubeMapTextureGLTest::compressedImageQueryViewBadFormat() {
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{4});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    char data[16];
+    MutableCompressedImageView2D image{CompressedPixelFormat::RGBAS3tcDxt1, Vector2i{4}, data};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.compressedImage(CubeMapCoordinate::PositiveX, 0, image);
+    CORRADE_COMPARE(out.str(), "GL::CubeMapTexture::compressedImage(): expected image view format GL::CompressedPixelFormat::RGBAS3tcDxt3 but got GL::CompressedPixelFormat::RGBAS3tcDxt1\n");
+}
+#endif
+
 #if !(defined(MAGNUM_TARGET_GLES2) && defined(MAGNUM_TARGET_WEBGL))
 void CubeMapTextureGLTest::immutableCompressedImage() {
     setTestCaseDescription(CompressedPixelStorageData[testCaseInstanceId()].name);
@@ -1284,6 +1537,107 @@ void CubeMapTextureGLTest::compressedSubImageQuery() {
         TestSuite::Compare::Container);
 }
 
+void CubeMapTextureGLTest::compressedSubImageQueryView() {
+    setTestCaseDescription(CompressedPixelStorageData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::ARB::get_texture_sub_image>())
+        CORRADE_SKIP(Extensions::ARB::get_texture_sub_image::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+    if(CompressedPixelStorageData[testCaseInstanceId()].storage != CompressedPixelStorage{} && !Context::current().isExtensionSupported<Extensions::ARB::compressed_texture_pixel_storage>())
+        CORRADE_SKIP(Extensions::ARB::compressed_texture_pixel_storage::string() + std::string(" is not supported."));
+    if(CompressedPixelStorageData[testCaseInstanceId()].storage == CompressedPixelStorage{} && !Context::current().isExtensionSupported<Extensions::ARB::internalformat_query2>())
+        CORRADE_SKIP(Extensions::ARB::internalformat_query2::string() + std::string(" is not supported."));
+
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{12})
+        .setCompressedSubImage(CubeMapCoordinate::PositiveX, 0, {}, CompressedImageView2D{CompressedPixelFormat::RGBAS3tcDxt3, {12, 12}, CompressedSubDataComplete});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{CompressedPixelStorageData[testCaseInstanceId()].offset + 16};
+    MutableCompressedImageView3D image{CompressedPixelStorageData[testCaseInstanceId()].storage, CompressedPixelFormat::RGBAS3tcDxt3, {4, 4, 1}, data};
+    texture.compressedSubImage(0, Range3Di::fromSize({4, 4, 0}, {4, 4, 1}), image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), (Vector3i{4, 4, 1}));
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(CompressedPixelStorageData[testCaseInstanceId()].offset),
+        CompressedPixelStorageData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+
+void CubeMapTextureGLTest::compressedSubImageQueryViewNullptr() {
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{12});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    MutableCompressedImageView3D image{CompressedPixelFormat::RGBAS3tcDxt3, Vector3i{4, 4, 1}, {nullptr, 16}};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.compressedSubImage(0, Range3Di::fromSize({4, 4, 0}, {4, 4, 1}), image);
+    CORRADE_COMPARE(out.str(), "GL::CubeMapTexture::compressedSubImage(): image view is nullptr\n");
+}
+
+void CubeMapTextureGLTest::compressedSubImageQueryViewBadSize() {
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{12});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    char data[2*16];
+    MutableCompressedImageView3D image{CompressedPixelFormat::RGBAS3tcDxt3, Vector3i{4, 4, 2}, data};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.compressedSubImage(0, Range3Di::fromSize({4, 4, 0}, {4, 4, 1}), image);
+    CORRADE_COMPARE(out.str(), "GL::CubeMapTexture::compressedSubImage(): expected image view size Vector(4, 4, 1) but got Vector(4, 4, 2)\n");
+}
+
+void CubeMapTextureGLTest::compressedSubImageQueryViewBadDataSize() {
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{12});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    char data[16 - 1];
+    MutableCompressedImageView3D image{CompressedPixelFormat::RGBAS3tcDxt3, Vector3i{4, 4, 1}, data};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.compressedSubImage(0, Range3Di::fromSize({4, 4, 0}, {4, 4, 1}), image);
+    CORRADE_COMPARE(out.str(), "GL::CubeMapTexture::compressedSubImage(): expected image view data size 16 bytes but got 15\n");
+}
+
+void CubeMapTextureGLTest::compressedSubImageQueryViewBadFormat() {
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{12});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    char data[16];
+    MutableCompressedImageView3D image{CompressedPixelFormat::RGBAS3tcDxt1, Vector3i{4, 4, 1}, data};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.compressedSubImage(0, Range3Di::fromSize({4, 4, 0}, {4, 4, 1}), image);
+    CORRADE_COMPARE(out.str(), "GL::CubeMapTexture::compressedSubImage(): expected image view format GL::CompressedPixelFormat::RGBAS3tcDxt3 but got GL::CompressedPixelFormat::RGBAS3tcDxt1\n");
+}
+
 void CubeMapTextureGLTest::compressedSubImageQueryBuffer() {
     setTestCaseDescription(CompressedPixelStorageData[testCaseInstanceId()].name);
 
@@ -1356,6 +1710,78 @@ void CubeMapTextureGLTest::fullImageQuery() {
     }
 }
 
+void CubeMapTextureGLTest::fullImageQueryView() {
+    setTestCaseDescription(FullPixelStorageData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::ARB::direct_state_access>())
+        CORRADE_SKIP(Extensions::ARB::direct_state_access::string() + std::string(" is not supported."));
+
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{2, 2})
+        .setSubImage(0, {}, ImageView3D{
+            PixelFormat::RGBA, PixelType::UnsignedByte, {2, 2, 6},
+            FullPixelStorageData[testCaseInstanceId()].data});
+
+    {
+        #ifdef CORRADE_TARGET_WINDOWS
+        bool fails(Context::current().detectedDriver() & Context::DetectedDriver::IntelWindows);
+        CORRADE_EXPECT_FAIL_IF(fails,
+            "ARB_DSA cubemap APIs are broken on Intel Windows drivers.");
+        #endif
+
+        MAGNUM_VERIFY_NO_GL_ERROR();
+        #ifdef CORRADE_TARGET_WINDOWS
+        if(fails) CORRADE_SKIP("Skipping the rest of the test");
+        #endif
+    }
+
+    Containers::Array<char> data{FullPixelStorageData[testCaseInstanceId()].offset + 2*2*6*4};
+    MutableImageView3D image{FullPixelStorageData[testCaseInstanceId()].storage, PixelFormat::RGBA, PixelType::UnsignedByte, {2, 2, 6}, data};
+    texture.image(0, image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), Vector3i(2, 2, 6));
+    {
+        CORRADE_EXPECT_FAIL_IF((Context::current().detectedDriver() & Context::DetectedDriver::Mesa) && FullPixelStorageData[testCaseInstanceId()].storage != PixelStorage{},
+            "Mesa drivers can't handle non-default pixel storage for full cubemap image queries.");
+        CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(FullPixelStorageData[testCaseInstanceId()].offset),
+            FullPixelStorageData[testCaseInstanceId()].data,
+            TestSuite::Compare::Container);
+    }
+}
+
+void CubeMapTextureGLTest::fullImageQueryViewNullptr() {
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{2});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    MutableImageView3D image{PixelFormat::RGBA, PixelType::UnsignedByte,
+        {2, 2, 6}, {nullptr, 2*2*6*4}};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.image(0, image);
+    CORRADE_COMPARE(out.str(), "GL::CubeMapTexture::image(): image view is nullptr\n");
+}
+
+void CubeMapTextureGLTest::fullImageQueryViewBadSize() {
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{2});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    char data[2*4*6];
+    MutableImageView3D image{PixelFormat::RGBA, PixelType::UnsignedByte,
+        {2, 1, 6}, data};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.image(0, image);
+    CORRADE_COMPARE(out.str(), "GL::CubeMapTexture::image(): expected image view size Vector(2, 2, 6) but got Vector(2, 1, 6)\n");
+}
+
 void CubeMapTextureGLTest::fullImageQueryBuffer() {
     setTestCaseDescription(FullPixelStorageData[testCaseInstanceId()].name);
 
@@ -1441,6 +1867,122 @@ void CubeMapTextureGLTest::compressedFullImageQuery() {
     }
 }
 
+void CubeMapTextureGLTest::compressedFullImageQueryView() {
+    setTestCaseDescription(CompressedFullPixelStorageData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::ARB::direct_state_access>())
+        CORRADE_SKIP(Extensions::ARB::direct_state_access::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+    if(CompressedPixelStorageData[testCaseInstanceId()].storage != CompressedPixelStorage{} && !Context::current().isExtensionSupported<Extensions::ARB::compressed_texture_pixel_storage>())
+        CORRADE_SKIP(Extensions::ARB::compressed_texture_pixel_storage::string() + std::string(" is not supported."));
+
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{4})
+        .setCompressedSubImage(0, {}, CompressedImageView3D{
+            CompressedPixelFormat::RGBAS3tcDxt3, {4, 4, 6},
+            CompressedFullPixelStorageData[testCaseInstanceId()].data});
+
+    {
+        #ifdef CORRADE_TARGET_WINDOWS
+        bool fails(Context::current().detectedDriver() & Context::DetectedDriver::IntelWindows);
+        CORRADE_EXPECT_FAIL_IF(fails,
+            "ARB_DSA cubemap APIs are broken on Intel Windows drivers.");
+        #endif
+
+        MAGNUM_VERIFY_NO_GL_ERROR();
+        #ifdef CORRADE_TARGET_WINDOWS
+        if(fails) CORRADE_SKIP("Skipping the rest of the test");
+        #endif
+    }
+
+    Containers::Array<char> data{CompressedFullPixelStorageData[testCaseInstanceId()].offset + 16*6};
+    MutableCompressedImageView3D image{CompressedFullPixelStorageData[testCaseInstanceId()].storage, CompressedPixelFormat::RGBAS3tcDxt3, {4, 4, 6}, data};
+    texture.compressedImage(0, image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), (Vector3i{4, 4, 6}));
+    {
+        CORRADE_EXPECT_FAIL_IF((Context::current().detectedDriver() & Context::DetectedDriver::Mesa) && CompressedFullPixelStorageData[testCaseInstanceId()].storage != CompressedPixelStorage{},
+            "Mesa drivers can't handle non-default pixel storage for full cubemap image queries.");
+        CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(CompressedFullPixelStorageData[testCaseInstanceId()].offset),
+            CompressedFullPixelStorageData[testCaseInstanceId()].data,
+            TestSuite::Compare::Container);
+    }
+}
+
+void CubeMapTextureGLTest::compressedFullImageQueryViewNullptr() {
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{4});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    MutableCompressedImageView3D image{CompressedPixelFormat::RGBAS3tcDxt3, Vector3i{4, 4, 6}, {nullptr, 16*6}};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.compressedImage(0, image);
+    CORRADE_COMPARE(out.str(), "GL::CubeMapTexture::compressedImage(): image view is nullptr\n");
+}
+
+void CubeMapTextureGLTest::compressedFullImageQueryViewBadSize() {
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{4});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    char data[2*6*16];
+    MutableCompressedImageView3D image{CompressedPixelFormat::RGBAS3tcDxt3, Vector3i{4, 8, 6}, data};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.compressedImage(0, image);
+    CORRADE_COMPARE(out.str(), "GL::CubeMapTexture::compressedImage(): expected image view size Vector(4, 4, 6) but got Vector(4, 8, 6)\n");
+}
+
+void CubeMapTextureGLTest::compressedFullImageQueryViewBadDataSize() {
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{4});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    char data[16*6 - 1];
+    MutableCompressedImageView3D image{CompressedPixelFormat::RGBAS3tcDxt3, Vector3i{4, 4, 6}, data};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.compressedImage(0, image);
+    CORRADE_COMPARE(out.str(), "GL::CubeMapTexture::compressedImage(): expected image view data size 96 bytes but got 95\n");
+}
+
+void CubeMapTextureGLTest::compressedFullImageQueryViewBadFormat() {
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+
+    CubeMapTexture texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, Vector2i{4});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    char data[6*16];
+    MutableCompressedImageView3D image{CompressedPixelFormat::RGBAS3tcDxt1, Vector3i{4, 4, 6}, data};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    texture.compressedImage(0, image);
+    CORRADE_COMPARE(out.str(), "GL::CubeMapTexture::compressedImage(): expected image view format GL::CompressedPixelFormat::RGBAS3tcDxt3 but got GL::CompressedPixelFormat::RGBAS3tcDxt1\n");
+}
+
 void CubeMapTextureGLTest::compressedFullImageQueryBuffer() {
     setTestCaseDescription(CompressedFullPixelStorageData[testCaseInstanceId()].name);
 

src/Magnum/GL/Test/FramebufferGLTest.cpp

@@ -23,6 +23,7 @@
     DEALINGS IN THE SOFTWARE.
 */
 
+#include <sstream>
 #include <Corrade/TestSuite/Compare/Container.h>
 #include <Corrade/Utility/DebugStl.h>
 
@@ -124,6 +125,9 @@ struct FramebufferGLTest: OpenGLTester {
     void invalidateSub();
     #endif
     void read();
+    void readView();
+    void readViewNullptr();
+    void readViewBadSize();
     #ifndef MAGNUM_TARGET_GLES2
     void readBuffer();
     #endif
@@ -263,6 +267,9 @@ FramebufferGLTest::FramebufferGLTest() {
               &FramebufferGLTest::invalidateSub,
               #endif
               &FramebufferGLTest::read,
+              &FramebufferGLTest::readView,
+              &FramebufferGLTest::readViewNullptr,
+              &FramebufferGLTest::readViewBadSize,
               #ifndef MAGNUM_TARGET_GLES2
               &FramebufferGLTest::readBuffer,
               #endif
@@ -1528,6 +1535,103 @@ void FramebufferGLTest::read() {
     #endif
 }
 
+void FramebufferGLTest::readView() {
+    using namespace Math::Literals;
+
+    #ifndef MAGNUM_TARGET_GLES
+    if(!Context::current().isExtensionSupported<Extensions::ARB::framebuffer_object>())
+        CORRADE_SKIP(Extensions::ARB::framebuffer_object::string() + std::string(" is not available."));
+    #endif
+
+    Renderbuffer color;
+    #ifndef MAGNUM_TARGET_GLES2
+    color.setStorage(RenderbufferFormat::RGBA8, Vector2i(128));
+    #else
+    color.setStorage(RenderbufferFormat::RGBA4, Vector2i(128));
+    #endif
+
+    Framebuffer framebuffer({{}, Vector2i(128)});
+    framebuffer.attachRenderbuffer(Framebuffer::ColorAttachment(0), color);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+    CORRADE_COMPARE(framebuffer.checkStatus(FramebufferTarget::Read), Framebuffer::Status::Complete);
+    CORRADE_COMPARE(framebuffer.checkStatus(FramebufferTarget::Draw), Framebuffer::Status::Complete);
+
+    #ifndef MAGNUM_TARGET_GLES2
+    Renderer::setClearColor(0x80402011_rgbaf);
+    #else
+    /* Using only RGBA4, supply less precision. This has to be one on the input
+       because SwiftShader stores RGBA4 as RGBA8 internally, thus preserving
+       the full precision of the input. */
+    Renderer::setClearColor(0x88442211_rgbaf);
+    #endif
+    Renderer::setClearDepth(Math::unpack<Float, UnsignedShort>(48352));
+    Renderer::setClearStencil(67);
+    framebuffer.clear(FramebufferClear::Color);
+
+    char data[(DataOffset + 8*16)*sizeof(Color4ub)]{};
+    MutableImageView2D view{DataStorage, PixelFormat::RGBA, PixelType::UnsignedByte, {8, 16}, data};
+    framebuffer.read(Range2Di::fromSize({16, 8}, {8, 16}), view);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+    CORRADE_COMPARE(view.size(), Vector2i(8, 16));
+    CORRADE_COMPARE(view.data().size(), (DataOffset + 8*16)*sizeof(Color4ub));
+    #ifndef MAGNUM_TARGET_GLES2
+    CORRADE_COMPARE(Containers::arrayCast<Color4ub>(view.data())[DataOffset], 0x80402011_rgba);
+    #else /* using only RGBA4, less precision */
+    CORRADE_COMPARE(Containers::arrayCast<Color4ub>(view.data())[DataOffset], 0x88442211_rgba);
+    #endif
+}
+
+void FramebufferGLTest::readViewNullptr() {
+    #ifndef MAGNUM_TARGET_GLES
+    if(!Context::current().isExtensionSupported<Extensions::ARB::framebuffer_object>())
+        CORRADE_SKIP(Extensions::ARB::framebuffer_object::string() + std::string(" is not available."));
+    #endif
+
+    Renderbuffer color;
+    #ifndef MAGNUM_TARGET_GLES2
+    color.setStorage(RenderbufferFormat::RGBA8, Vector2i(128));
+    #else
+    color.setStorage(RenderbufferFormat::RGBA4, Vector2i(128));
+    #endif
+
+    Framebuffer framebuffer({{}, Vector2i(128)});
+    framebuffer.attachRenderbuffer(Framebuffer::ColorAttachment(0), color);
+
+    MutableImageView2D view{DataStorage, PixelFormat::RGBA, PixelType::UnsignedByte, {8, 16}, {nullptr, (DataOffset + 8*15)*sizeof(Color4ub)}};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    framebuffer.read({{}, {8, 16}}, view);
+    CORRADE_COMPARE(out.str(), "GL::AbstractFramebuffer::read(): image view is nullptr\n");
+}
+
+void FramebufferGLTest::readViewBadSize() {
+    #ifndef MAGNUM_TARGET_GLES
+    if(!Context::current().isExtensionSupported<Extensions::ARB::framebuffer_object>())
+        CORRADE_SKIP(Extensions::ARB::framebuffer_object::string() + std::string(" is not available."));
+    #endif
+
+    Renderbuffer color;
+    #ifndef MAGNUM_TARGET_GLES2
+    color.setStorage(RenderbufferFormat::RGBA8, Vector2i(128));
+    #else
+    color.setStorage(RenderbufferFormat::RGBA4, Vector2i(128));
+    #endif
+
+    Framebuffer framebuffer({{}, Vector2i(128)});
+    framebuffer.attachRenderbuffer(Framebuffer::ColorAttachment(0), color);
+
+    char data[(DataOffset + 8*15)*sizeof(Color4ub)]{};
+    MutableImageView2D view{DataStorage, PixelFormat::RGBA, PixelType::UnsignedByte, {8, 15}, data};
+
+    std::ostringstream out;
+    Error redirectError{&out};
+    framebuffer.read({{}, {8, 16}}, view);
+    CORRADE_COMPARE(out.str(), "GL::AbstractFramebuffer::read(): expected image view size Vector(8, 16) but got Vector(8, 15)\n");
+}
+
 #ifndef MAGNUM_TARGET_GLES2
 void FramebufferGLTest::readBuffer() {
     #ifndef MAGNUM_TARGET_GLES

src/Magnum/GL/Test/RectangleTextureGLTest.cpp

@@ -60,17 +60,23 @@ struct RectangleTextureGLTest: OpenGLTester {
 
     void image();
     void imageBuffer();
+    void imageQueryView();
     void subImage();
     void subImageBuffer();
     void subImageQuery();
+    void subImageQueryView();
     void subImageQueryBuffer();
+    /* View query assertions tested in AbstractTextureGLTest */
 
     void compressedImage();
     void compressedImageBuffer();
+    void compressedImageQueryView();
     void compressedSubImage();
     void compressedSubImageBuffer();
     void compressedSubImageQuery();
+    void compressedSubImageQueryView();
     void compressedSubImageQueryBuffer();
+    /* View query assertions tested in AbstractTextureGLTest */
 
     void invalidateImage();
     void invalidateSubImage();
@@ -126,17 +132,21 @@ RectangleTextureGLTest::RectangleTextureGLTest() {
     addInstancedTests({
         &RectangleTextureGLTest::image,
         &RectangleTextureGLTest::imageBuffer,
+        &RectangleTextureGLTest::imageQueryView,
         &RectangleTextureGLTest::subImage,
         &RectangleTextureGLTest::subImageBuffer,
         &RectangleTextureGLTest::subImageQuery,
+        &RectangleTextureGLTest::subImageQueryView,
         &RectangleTextureGLTest::subImageQueryBuffer},
         Containers::arraySize(PixelStorageData));
 
     addTests({&RectangleTextureGLTest::compressedImage,
               &RectangleTextureGLTest::compressedImageBuffer,
+              &RectangleTextureGLTest::compressedImageQueryView,
               &RectangleTextureGLTest::compressedSubImage,
               &RectangleTextureGLTest::compressedSubImageBuffer,
               &RectangleTextureGLTest::compressedSubImageQuery,
+              &RectangleTextureGLTest::compressedSubImageQueryView,
               &RectangleTextureGLTest::compressedSubImageQueryBuffer,
 
               &RectangleTextureGLTest::invalidateImage,
@@ -359,6 +369,32 @@ void RectangleTextureGLTest::imageBuffer() {
         TestSuite::Compare::Container);
 }
 
+void RectangleTextureGLTest::imageQueryView() {
+    setTestCaseDescription(PixelStorageData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::ARB::texture_rectangle>())
+        CORRADE_SKIP(Extensions::ARB::texture_rectangle::string() + std::string(" is not supported."));
+
+    RectangleTexture texture;
+    texture.setImage(TextureFormat::RGBA8, ImageView2D{
+        PixelStorageData[testCaseInstanceId()].storage,
+        PixelFormat::RGBA, PixelType::UnsignedByte, Vector2i(2),
+        PixelStorageData[testCaseInstanceId()].dataSparse});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{PixelStorageData[testCaseInstanceId()].offset + 2*2*4};
+    MutableImageView2D image{PixelStorageData[testCaseInstanceId()].storage, PixelFormat::RGBA, PixelType::UnsignedByte, Vector2i{2}, data};
+    texture.image(image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), Vector2i(2));
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(PixelStorageData[testCaseInstanceId()].offset),
+        PixelStorageData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+
 constexpr UnsignedByte Zero[4*4*4]{};
 constexpr UnsignedByte SubDataComplete[]{
     0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
@@ -446,6 +482,32 @@ void RectangleTextureGLTest::subImageQuery() {
         TestSuite::Compare::Container);
 }
 
+void RectangleTextureGLTest::subImageQueryView() {
+    setTestCaseDescription(PixelStorageData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::ARB::texture_rectangle>())
+        CORRADE_SKIP(Extensions::ARB::texture_rectangle::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::ARB::get_texture_sub_image>())
+        CORRADE_SKIP(Extensions::ARB::get_texture_sub_image::string() + std::string(" is not supported."));
+
+    RectangleTexture texture;
+    texture.setStorage(TextureFormat::RGBA8, Vector2i{4})
+           .setSubImage({}, ImageView2D{PixelFormat::RGBA, PixelType::UnsignedByte, Vector2i{4}, SubDataComplete});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{PixelStorageData[testCaseInstanceId()].offset + 2*2*4};
+    MutableImageView2D image{PixelStorageData[testCaseInstanceId()].storage, PixelFormat::RGBA, PixelType::UnsignedByte, Vector2i{2}, data};
+    texture.subImage(Range2Di::fromSize(Vector2i{1}, Vector2i{2}), image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), Vector2i{2});
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(PixelStorageData[testCaseInstanceId()].offset),
+        PixelStorageData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+
 void RectangleTextureGLTest::subImageQueryBuffer() {
     setTestCaseDescription(PixelStorageData[testCaseInstanceId()].name);
 
@@ -481,6 +543,10 @@ void RectangleTextureGLTest::compressedImageBuffer() {
     CORRADE_SKIP("No rectangle texture compression format exists.");
 }
 
+void RectangleTextureGLTest::compressedImageQueryView() {
+    CORRADE_SKIP("No rectangle texture compression format exists.");
+}
+
 void RectangleTextureGLTest::compressedSubImage() {
     CORRADE_SKIP("No rectangle texture compression format exists.");
 }
@@ -493,6 +559,10 @@ void RectangleTextureGLTest::compressedSubImageQuery() {
     CORRADE_SKIP("No rectangle texture compression format exists.");
 }
 
+void RectangleTextureGLTest::compressedSubImageQueryView() {
+    CORRADE_SKIP("No rectangle texture compression format exists.");
+}
+
 void RectangleTextureGLTest::compressedSubImageQueryBuffer() {
     CORRADE_SKIP("No rectangle texture compression format exists.");
 }

src/Magnum/GL/Test/TextureArrayGLTest.cpp

@@ -111,35 +111,51 @@ struct TextureArrayGLTest: OpenGLTester {
     #ifndef MAGNUM_TARGET_GLES
     void image1D();
     void image1DBuffer();
+    void image1DQueryView();
     void subImage1D();
     void subImage1DBuffer();
     void subImage1DQuery();
+    void subImage1DQueryView();
     void subImage1DQueryBuffer();
+    /* View query assertions tested in AbstractTextureGLTest */
 
     void compressedImage1D();
     void compressedImage1DBuffer();
+    void compressedImage1DQueryView();
     void compressedSubImage1D();
     void compressedSubImage1DBuffer();
     void compressedSubImage1DQuery();
+    void compressedSubImage1DQueryView();
     void compressedSubImage1DQueryBuffer();
+    /* View query assertions tested in AbstractTextureGLTest */
     #endif
 
     void image2D();
     void image2DBuffer();
+    #ifndef MAGNUM_TARGET_GLES
+    void image2DQueryView();
+    #endif
     void subImage2D();
     void subImage2DBuffer();
     #ifndef MAGNUM_TARGET_GLES
     void subImage2DQuery();
+    void subImage2DQueryView();
     void subImage2DQueryBuffer();
+    /* View query assertions tested in AbstractTextureGLTest */
     #endif
 
     void compressedImage2D();
     void compressedImage2DBuffer();
+    #ifndef MAGNUM_TARGET_GLES
+    void compressedImage2DQueryView();
+    #endif
     void compressedSubImage2D();
     void compressedSubImage2DBuffer();
     #ifndef MAGNUM_TARGET_GLES
     void compressedSubImage2DQuery();
+    void compressedSubImage2DQueryView();
     void compressedSubImage2DQueryBuffer();
+    /* View query assertions tested in AbstractTextureGLTest */
     #endif
 
     #ifndef MAGNUM_TARGET_GLES
@@ -320,27 +336,35 @@ TextureArrayGLTest::TextureArrayGLTest() {
     addInstancedTests({
         &TextureArrayGLTest::image1D,
         &TextureArrayGLTest::image1DBuffer,
+        &TextureArrayGLTest::image1DQueryView,
         &TextureArrayGLTest::subImage1D,
         &TextureArrayGLTest::subImage1DBuffer,
         &TextureArrayGLTest::subImage1DQuery,
+        &TextureArrayGLTest::subImage1DQueryView,
         &TextureArrayGLTest::subImage1DQueryBuffer},
         Containers::arraySize(PixelStorage1DData));
 
     addTests({&TextureArrayGLTest::compressedImage1D,
               &TextureArrayGLTest::compressedImage1DBuffer,
+              &TextureArrayGLTest::compressedImage1DQueryView,
               &TextureArrayGLTest::compressedSubImage1D,
               &TextureArrayGLTest::compressedSubImage1DBuffer,
               &TextureArrayGLTest::compressedSubImage1DQuery,
+              &TextureArrayGLTest::compressedSubImage1DQueryView,
               &TextureArrayGLTest::compressedSubImage1DQueryBuffer});
     #endif
 
     addInstancedTests({
         &TextureArrayGLTest::image2D,
         &TextureArrayGLTest::image2DBuffer,
+        #ifndef MAGNUM_TARGET_GLES
+        &TextureArrayGLTest::image2DQueryView,
+        #endif
         &TextureArrayGLTest::subImage2D,
         &TextureArrayGLTest::subImage2DBuffer,
         #ifndef MAGNUM_TARGET_GLES
         &TextureArrayGLTest::subImage2DQuery,
+        &TextureArrayGLTest::subImage2DQueryView,
         &TextureArrayGLTest::subImage2DQueryBuffer
         #endif
         }, Containers::arraySize(PixelStorage2DData));
@@ -348,10 +372,14 @@ TextureArrayGLTest::TextureArrayGLTest() {
     addInstancedTests({
         &TextureArrayGLTest::compressedImage2D,
         &TextureArrayGLTest::compressedImage2DBuffer,
+        #ifndef MAGNUM_TARGET_GLES
+        &TextureArrayGLTest::compressedImage2DQueryView,
+        #endif
         &TextureArrayGLTest::compressedSubImage2D,
         &TextureArrayGLTest::compressedSubImage2DBuffer,
         #ifndef MAGNUM_TARGET_GLES
         &TextureArrayGLTest::compressedSubImage2DQuery,
+        &TextureArrayGLTest::compressedSubImage2DQueryView,
         &TextureArrayGLTest::compressedSubImage2DQueryBuffer
         #endif
         }, Containers::arraySize(CompressedPixelStorage2DData));
@@ -882,6 +910,32 @@ void TextureArrayGLTest::image1DBuffer() {
         TestSuite::Compare::Container);
 }
 
+void TextureArrayGLTest::image1DQueryView() {
+    setTestCaseDescription(PixelStorage1DData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_array>())
+        CORRADE_SKIP(Extensions::EXT::texture_array::string() + std::string(" is not supported."));
+
+    Texture1DArray texture;
+    texture.setImage(0, TextureFormat::RGBA8, ImageView2D{
+        PixelStorage1DData[testCaseInstanceId()].storage,
+        PixelFormat::RGBA, PixelType::UnsignedByte, Vector2i(2), PixelStorage1DData[testCaseInstanceId()].dataSparse});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{PixelStorage1DData[testCaseInstanceId()].offset + 2*2*4};
+    MutableImageView2D image{PixelStorage1DData[testCaseInstanceId()].storage,
+        PixelFormat::RGBA, PixelType::UnsignedByte, Vector2i{2}, data};
+    texture.image(0, image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), Vector2i(2));
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(PixelStorage1DData[testCaseInstanceId()].offset),
+        PixelStorage1DData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+
 constexpr UnsignedByte Zero1D[4*4*4] = {};
 constexpr UnsignedByte SubData1DComplete[] = {
     0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
@@ -969,6 +1023,33 @@ void TextureArrayGLTest::subImage1DQuery() {
         TestSuite::Compare::Container);
 }
 
+void TextureArrayGLTest::subImage1DQueryView() {
+    setTestCaseDescription(PixelStorage1DData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_array>())
+        CORRADE_SKIP(Extensions::EXT::texture_array::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::ARB::get_texture_sub_image>())
+        CORRADE_SKIP(Extensions::ARB::get_texture_sub_image::string() + std::string(" is not supported."));
+
+    Texture1DArray texture;
+    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{4})
+           .setSubImage(0, {}, ImageView2D{PixelFormat::RGBA, PixelType::UnsignedByte, Vector2i{4}, SubData1DComplete});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{PixelStorage1DData[testCaseInstanceId()].offset + 2*2*4};
+    MutableImageView2D image{PixelStorage1DData[testCaseInstanceId()].storage,
+        PixelFormat::RGBA, PixelType::UnsignedByte, Vector2i{2}, data};
+    texture.subImage(0, Range2Di::fromSize(Vector2i{1}, Vector2i{2}), image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), Vector2i{2});
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(PixelStorage1DData[testCaseInstanceId()].offset),
+        PixelStorage1DData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+
 void TextureArrayGLTest::subImage1DQueryBuffer() {
     setTestCaseDescription(PixelStorage1DData[testCaseInstanceId()].name);
 
@@ -1006,6 +1087,10 @@ void TextureArrayGLTest::compressedImage1DBuffer() {
     CORRADE_SKIP("No 1D texture compression format exists.");
 }
 
+void TextureArrayGLTest::compressedImage1DQueryView() {
+    CORRADE_SKIP("No 1D texture compression format exists.");
+}
+
 void TextureArrayGLTest::compressedSubImage1D() {
     CORRADE_SKIP("No 1D texture compression format exists.");
 }
@@ -1018,6 +1103,10 @@ void TextureArrayGLTest::compressedSubImage1DQuery() {
     CORRADE_SKIP("No 1D texture compression format exists.");
 }
 
+void TextureArrayGLTest::compressedSubImage1DQueryView() {
+    CORRADE_SKIP("No 1D texture compression format exists.");
+}
+
 void TextureArrayGLTest::compressedSubImage1DQueryBuffer() {
     CORRADE_SKIP("No 1D texture compression format exists.");
 }
@@ -1085,6 +1174,35 @@ void TextureArrayGLTest::image2DBuffer() {
     #endif
 }
 
+#ifndef MAGNUM_TARGET_GLES
+void TextureArrayGLTest::image2DQueryView() {
+    setTestCaseDescription(PixelStorage2DData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_array>())
+        CORRADE_SKIP(Extensions::EXT::texture_array::string() + std::string(" is not supported."));
+
+    Texture2DArray texture;
+    texture.setImage(0, TextureFormat::RGBA8, ImageView3D{
+        PixelStorage2DData[testCaseInstanceId()].storage,
+        PixelFormat::RGBA, PixelType::UnsignedByte, Vector3i(2),
+        PixelStorage2DData[testCaseInstanceId()].dataSparse});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{PixelStorage2DData[testCaseInstanceId()].offset + 2*2*2*4};
+    MutableImageView3D image{PixelStorage2DData[testCaseInstanceId()].storage,
+        PixelFormat::RGBA, PixelType::UnsignedByte, Vector3i{2}, data};
+    texture.image(0, image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), Vector3i(2));
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(PixelStorage2DData[testCaseInstanceId()].offset),
+        PixelStorage2DData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+#endif
+
 constexpr UnsignedByte Zero2D[4*4*4*4]{};
 
 #ifndef MAGNUM_TARGET_GLES
@@ -1202,6 +1320,33 @@ void TextureArrayGLTest::subImage2DQuery() {
         TestSuite::Compare::Container);
 }
 
+void TextureArrayGLTest::subImage2DQueryView() {
+    setTestCaseDescription(PixelStorage2DData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_array>())
+        CORRADE_SKIP(Extensions::EXT::texture_array::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::ARB::get_texture_sub_image>())
+        CORRADE_SKIP(Extensions::ARB::get_texture_sub_image::string() + std::string(" is not supported."));
+
+    Texture2DArray texture;
+    texture.setStorage(1, TextureFormat::RGBA8, Vector3i{4})
+           .setSubImage(0, {}, ImageView3D{PixelFormat::RGBA, PixelType::UnsignedByte, Vector3i{4}, SubData2DComplete});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{PixelStorage2DData[testCaseInstanceId()].offset + 2*2*2*4};
+    MutableImageView3D image{PixelStorage2DData[testCaseInstanceId()].storage,
+        PixelFormat::RGBA, PixelType::UnsignedByte, Vector3i{2}, data};
+    texture.subImage(0, Range3Di::fromSize(Vector3i{1}, Vector3i{2}), image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), Vector3i{2});
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(PixelStorage2DData[testCaseInstanceId()].offset),
+        PixelStorage2DData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+
 void TextureArrayGLTest::subImage2DQueryBuffer() {
     setTestCaseDescription(PixelStorage2DData[testCaseInstanceId()].name);
 
@@ -1316,6 +1461,39 @@ void TextureArrayGLTest::compressedImage2DBuffer() {
     #endif
 }
 
+#ifndef MAGNUM_TARGET_GLES
+void TextureArrayGLTest::compressedImage2DQueryView() {
+    setTestCaseDescription(CompressedPixelStorage2DData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_array>())
+        CORRADE_SKIP(Extensions::EXT::texture_array::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+
+    if(CompressedPixelStorage2DData[testCaseInstanceId()].storage != CompressedPixelStorage{} && !Context::current().isExtensionSupported<Extensions::ARB::compressed_texture_pixel_storage>())
+        CORRADE_SKIP(Extensions::ARB::compressed_texture_pixel_storage::string() + std::string(" is not supported."));
+
+    Texture2DArray texture;
+    texture.setCompressedImage(0, CompressedImageView3D{
+        CompressedPixelStorage2DData[testCaseInstanceId()].storage,
+        CompressedPixelFormat::RGBAS3tcDxt3, {4, 4, 2},
+        CompressedPixelStorage2DData[testCaseInstanceId()].dataSparse});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{CompressedPixelStorage2DData[testCaseInstanceId()].offset + 2*16};
+    MutableCompressedImageView3D image{CompressedPixelStorage2DData[testCaseInstanceId()].storage, CompressedPixelFormat::RGBAS3tcDxt3, {4, 4, 2}, data};
+    texture.compressedImage(0, image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), (Vector3i{4, 4, 2}));
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(CompressedPixelStorage2DData[testCaseInstanceId()].offset),
+        CompressedPixelStorage2DData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+#endif
+
 /* Just 12x4x4 zeros compressed using RGBA DXT3 by the driver */
 constexpr UnsignedByte CompressedZero2D[3*4*16]{};
 
@@ -1480,6 +1658,39 @@ void TextureArrayGLTest::compressedSubImage2DQuery() {
         TestSuite::Compare::Container);
 }
 
+void TextureArrayGLTest::compressedSubImage2DQueryView() {
+    setTestCaseDescription(CompressedPixelStorage2DData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_array>())
+        CORRADE_SKIP(Extensions::EXT::texture_array::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::ARB::get_texture_sub_image>())
+        CORRADE_SKIP(Extensions::ARB::get_texture_sub_image::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+    if(CompressedPixelStorage2DData[testCaseInstanceId()].storage != CompressedPixelStorage{} && !Context::current().isExtensionSupported<Extensions::ARB::compressed_texture_pixel_storage>())
+        CORRADE_SKIP(Extensions::ARB::compressed_texture_pixel_storage::string() + std::string(" is not supported."));
+    if(CompressedPixelStorage2DData[testCaseInstanceId()].storage == CompressedPixelStorage{} && !Context::current().isExtensionSupported<Extensions::ARB::internalformat_query2>())
+        CORRADE_SKIP(Extensions::ARB::internalformat_query2::string() + std::string(" is not supported."));
+
+    Texture2DArray texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, {12, 4, 4})
+           .setCompressedSubImage(0, {}, CompressedImageView3D{CompressedPixelFormat::RGBAS3tcDxt3,
+               {12, 4, 4}, CompressedSubData2DComplete});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{CompressedPixelStorage2DData[testCaseInstanceId()].offset + 2*16};
+    MutableCompressedImageView3D image{CompressedPixelStorage2DData[testCaseInstanceId()].storage, CompressedPixelFormat::RGBAS3tcDxt3, {4, 4, 2}, data};
+    texture.compressedSubImage(0, Range3Di::fromSize({4, 0, 1}, {4, 4, 2}), image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), (Vector3i{4, 4, 2}));
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(CompressedPixelStorage2DData[testCaseInstanceId()].offset),
+        CompressedPixelStorage2DData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+
 void TextureArrayGLTest::compressedSubImage2DQueryBuffer() {
     setTestCaseDescription(CompressedPixelStorage2DData[testCaseInstanceId()].name);
 

src/Magnum/GL/Test/TextureGLTest.cpp

@@ -140,43 +140,59 @@ struct TextureGLTest: OpenGLTester {
     #ifndef MAGNUM_TARGET_GLES
     void image1D();
     void image1DBuffer();
+    void image1DQueryView();
     void subImage1D();
     void subImage1DBuffer();
     void subImage1DQuery();
+    void subImage1DQueryView();
     void subImage1DQueryBuffer();
+    /* View query assertions tested in AbstractTextureGLTest */
 
     void compressedImage1D();
     void compressedImage1DBuffer();
+    void compressedImage1DQueryView();
     void compressedSubImage1D();
     void compressedSubImage1DBuffer();
     void compressedSubImage1DQuery();
+    void compressedSubImage1DQueryView();
     void compressedSubImage1DQueryBuffer();
+    /* View query assertions tested in AbstractTextureGLTest */
     #endif
 
     void image2D();
     #ifndef MAGNUM_TARGET_GLES2
     void image2DBuffer();
     #endif
+    #ifndef MAGNUM_TARGET_GLES
+    void image2DQueryView();
+    #endif
     void subImage2D();
     #ifndef MAGNUM_TARGET_GLES2
     void subImage2DBuffer();
     #endif
     #ifndef MAGNUM_TARGET_GLES
     void subImage2DQuery();
+    void subImage2DQueryView();
     void subImage2DQueryBuffer();
+    /* View query assertions tested in AbstractTextureGLTest */
     #endif
 
     void compressedImage2D();
     #ifndef MAGNUM_TARGET_GLES2
     void compressedImage2DBuffer();
     #endif
+    #ifndef MAGNUM_TARGET_GLES
+    void compressedImage2DQueryView();
+    #endif
     void compressedSubImage2D();
     #ifndef MAGNUM_TARGET_GLES2
     void compressedSubImage2DBuffer();
     #endif
     #ifndef MAGNUM_TARGET_GLES
     void compressedSubImage2DQuery();
+    void compressedSubImage2DQueryView();
     void compressedSubImage2DQueryBuffer();
+    /* View query assertions tested in AbstractTextureGLTest */
     #endif
 
     #if !(defined(MAGNUM_TARGET_GLES2) && defined(MAGNUM_TARGET_WEBGL))
@@ -184,26 +200,36 @@ struct TextureGLTest: OpenGLTester {
     #ifndef MAGNUM_TARGET_GLES2
     void image3DBuffer();
     #endif
+    #ifndef MAGNUM_TARGET_GLES
+    void image3DQueryView();
+    #endif
     void subImage3D();
     #ifndef MAGNUM_TARGET_GLES2
     void subImage3DBuffer();
     #endif
     #ifndef MAGNUM_TARGET_GLES
     void subImage3DQuery();
+    void subImage3DQueryView();
     void subImage3DQueryBuffer();
+    /* View query assertions tested in AbstractTextureGLTest */
     #endif
 
     void compressedImage3D();
     #ifndef MAGNUM_TARGET_GLES2
     void compressedImage3DBuffer();
     #endif
+    #ifndef MAGNUM_TARGET_GLES
+    void compressedImage3DQueryView();
+    #endif
     void compressedSubImage3D();
     #ifndef MAGNUM_TARGET_GLES2
     void compressedSubImage3DBuffer();
     #endif
     #ifndef MAGNUM_TARGET_GLES
     void compressedSubImage3DQuery();
+    void compressedSubImage3DQueryView();
     void compressedSubImage3DQueryBuffer();
+    /* View query assertions tested in AbstractTextureGLTest */
     #endif
     #endif
 
@@ -501,17 +527,21 @@ TextureGLTest::TextureGLTest() {
     addInstancedTests({
         &TextureGLTest::image1D,
         &TextureGLTest::image1DBuffer,
+        &TextureGLTest::image1DQueryView,
         &TextureGLTest::subImage1D,
         &TextureGLTest::subImage1DBuffer,
         &TextureGLTest::subImage1DQuery,
+        &TextureGLTest::subImage1DQueryView,
         &TextureGLTest::subImage1DQueryBuffer},
         Containers::arraySize(PixelStorage1DData));
 
     addTests({&TextureGLTest::compressedImage1D,
               &TextureGLTest::compressedImage1DBuffer,
+              &TextureGLTest::compressedImage1DQueryView,
               &TextureGLTest::compressedSubImage1D,
               &TextureGLTest::compressedSubImage1DBuffer,
               &TextureGLTest::compressedSubImage1DQuery,
+              &TextureGLTest::compressedSubImage1DQueryView,
               &TextureGLTest::compressedSubImage1DQueryBuffer});
     #endif
 
@@ -520,12 +550,16 @@ TextureGLTest::TextureGLTest() {
         #ifndef MAGNUM_TARGET_GLES2
         &TextureGLTest::image2DBuffer,
         #endif
+        #ifndef MAGNUM_TARGET_GLES
+        &TextureGLTest::image2DQueryView,
+        #endif
         &TextureGLTest::subImage2D,
         #ifndef MAGNUM_TARGET_GLES2
         &TextureGLTest::subImage2DBuffer,
         #endif
         #ifndef MAGNUM_TARGET_GLES
         &TextureGLTest::subImage2DQuery,
+        &TextureGLTest::subImage2DQueryView,
         &TextureGLTest::subImage2DQueryBuffer,
         #endif
         }, Containers::arraySize(PixelStorage2DData));
@@ -535,12 +569,16 @@ TextureGLTest::TextureGLTest() {
         #ifndef MAGNUM_TARGET_GLES2
         &TextureGLTest::compressedImage2DBuffer,
         #endif
+        #ifndef MAGNUM_TARGET_GLES
+        &TextureGLTest::compressedImage2DQueryView,
+        #endif
         &TextureGLTest::compressedSubImage2D,
         #ifndef MAGNUM_TARGET_GLES2
         &TextureGLTest::compressedSubImage2DBuffer,
         #endif
         #ifndef MAGNUM_TARGET_GLES
         &TextureGLTest::compressedSubImage2DQuery,
+        &TextureGLTest::compressedSubImage2DQueryView,
         &TextureGLTest::compressedSubImage2DQueryBuffer
         #endif
         }, Containers::arraySize(CompressedPixelStorage2DData));
@@ -551,12 +589,16 @@ TextureGLTest::TextureGLTest() {
         #ifndef MAGNUM_TARGET_GLES2
         &TextureGLTest::image3DBuffer,
         #endif
+        #ifndef MAGNUM_TARGET_GLES
+        &TextureGLTest::image3DQueryView,
+        #endif
         &TextureGLTest::subImage3D,
         #ifndef MAGNUM_TARGET_GLES2
         &TextureGLTest::subImage3DBuffer,
         #endif
         #ifndef MAGNUM_TARGET_GLES
         &TextureGLTest::subImage3DQuery,
+        &TextureGLTest::subImage3DQueryView,
         &TextureGLTest::subImage3DQueryBuffer,
         #endif
         }, Containers::arraySize(PixelStorage3DData));
@@ -566,12 +608,16 @@ TextureGLTest::TextureGLTest() {
         #ifndef MAGNUM_TARGET_GLES2
         &TextureGLTest::compressedImage3DBuffer,
         #endif
+        #ifndef MAGNUM_TARGET_GLES
+        &TextureGLTest::compressedImage3DQueryView,
+        #endif
         &TextureGLTest::compressedSubImage3D,
         #ifndef MAGNUM_TARGET_GLES2
         &TextureGLTest::compressedSubImage3DBuffer,
         #endif
         #ifndef MAGNUM_TARGET_GLES
         &TextureGLTest::compressedSubImage3DQuery,
+        &TextureGLTest::compressedSubImage3DQueryView,
         &TextureGLTest::compressedSubImage3DQueryBuffer
         #endif
         }, Containers::arraySize(CompressedPixelStorage3DData));
@@ -1319,6 +1365,30 @@ void TextureGLTest::image1DBuffer() {
         TestSuite::Compare::Container);
 }
 
+void TextureGLTest::image1DQueryView() {
+    setTestCaseDescription(PixelStorage1DData[testCaseInstanceId()].name);
+
+    Texture1D texture;
+    texture.setImage(0, TextureFormat::RGBA8, ImageView1D{
+        PixelStorage1DData[testCaseInstanceId()].storage,
+        PixelFormat::RGBA, PixelType::UnsignedByte, 2,
+        PixelStorage1DData[testCaseInstanceId()].dataSparse});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{PixelStorage1DData[testCaseInstanceId()].offset + 2*4};
+    MutableImageView1D image{PixelStorage1DData[testCaseInstanceId()].storage,
+        PixelFormat::RGBA, PixelType::UnsignedByte, 2, data};
+    texture.image(0, image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), 2);
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(PixelStorage1DData[testCaseInstanceId()].offset),
+        PixelStorage1DData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+
 constexpr UnsignedByte Zero1D[4*4] = {};
 constexpr UnsignedByte SubData1DComplete[]{
     0, 0, 0, 0, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0, 0, 0, 0
@@ -1395,6 +1465,31 @@ void TextureGLTest::subImage1DQuery() {
         TestSuite::Compare::Container);
 }
 
+void TextureGLTest::subImage1DQueryView() {
+    setTestCaseDescription(PixelStorage1DData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::ARB::get_texture_sub_image>())
+        CORRADE_SKIP(Extensions::ARB::get_texture_sub_image::string() + std::string(" is not supported."));
+
+    Texture1D texture;
+    texture.setStorage(1, TextureFormat::RGBA8, 4)
+           .setSubImage(0, {}, ImageView1D{PixelFormat::RGBA, PixelType::UnsignedByte, 4, SubData1DComplete});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{PixelStorage1DData[testCaseInstanceId()].offset + 2*4};
+    MutableImageView1D image{PixelStorage1DData[testCaseInstanceId()].storage,
+        PixelFormat::RGBA, PixelType::UnsignedByte, 2, data};
+    texture.subImage(0, Range1Di::fromSize(1, 2), image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), 2);
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(PixelStorage1DData[testCaseInstanceId()].offset),
+        PixelStorage1DData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+
 void TextureGLTest::subImage1DQueryBuffer() {
     setTestCaseDescription(PixelStorage1DData[testCaseInstanceId()].name);
 
@@ -1428,6 +1523,10 @@ void TextureGLTest::compressedImage1DBuffer() {
     CORRADE_SKIP("No 1D texture compression format exists.");
 }
 
+void TextureGLTest::compressedImage1DQueryView() {
+    CORRADE_SKIP("No 1D texture compression format exists.");
+}
+
 void TextureGLTest::compressedSubImage1D() {
     CORRADE_SKIP("No 1D texture compression format exists.");
 }
@@ -1440,6 +1539,10 @@ void TextureGLTest::compressedSubImage1DQuery() {
     CORRADE_SKIP("No 1D texture compression format exists.");
 }
 
+void TextureGLTest::compressedSubImage1DQueryView() {
+    CORRADE_SKIP("No 1D texture compression format exists.");
+}
+
 void TextureGLTest::compressedSubImage1DQueryBuffer() {
     CORRADE_SKIP("No 1D texture compression format exists.");
 }
@@ -1516,6 +1619,32 @@ void TextureGLTest::image2DBuffer() {
 }
 #endif
 
+#ifndef MAGNUM_TARGET_GLES
+void TextureGLTest::image2DQueryView() {
+    setTestCaseDescription(PixelStorage2DData[testCaseInstanceId()].name);
+
+    Texture2D texture;
+    texture.setImage(0, TextureFormat::RGBA8, ImageView2D{
+        PixelStorage2DData[testCaseInstanceId()].storage,
+        PixelFormat::RGBA, PixelType::UnsignedByte, Vector2i(2),
+        PixelStorage2DData[testCaseInstanceId()].dataSparse});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{PixelStorage2DData[testCaseInstanceId()].offset + 2*2*4};
+    MutableImageView2D image{PixelStorage2DData[testCaseInstanceId()].storage,
+        PixelFormat::RGBA, PixelType::UnsignedByte, Vector2i{2}, data};
+    texture.image(0, image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), Vector2i(2));
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(PixelStorage2DData[testCaseInstanceId()].offset),
+        PixelStorage2DData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+#endif
+
 constexpr UnsignedByte Zero2D[4*4*4]{};
 
 #ifndef MAGNUM_TARGET_GLES
@@ -1620,6 +1749,31 @@ void TextureGLTest::subImage2DQuery() {
         TestSuite::Compare::Container);
 }
 
+void TextureGLTest::subImage2DQueryView() {
+    setTestCaseDescription(PixelStorage2DData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::ARB::get_texture_sub_image>())
+        CORRADE_SKIP(Extensions::ARB::get_texture_sub_image::string() + std::string(" is not supported."));
+
+    Texture2D texture;
+    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{4})
+           .setSubImage(0, {}, ImageView2D{PixelFormat::RGBA, PixelType::UnsignedByte, Vector2i{4}, SubData2DComplete});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{PixelStorage2DData[testCaseInstanceId()].offset + 2*2*4};
+    MutableImageView2D image{PixelStorage2DData[testCaseInstanceId()].storage,
+        PixelFormat::RGBA, PixelType::UnsignedByte, Vector2i{2}, data};
+    texture.subImage(0, Range2Di::fromSize(Vector2i{1}, Vector2i{2}), image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), Vector2i{2});
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(PixelStorage2DData[testCaseInstanceId()].offset),
+        PixelStorage2DData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+
 void TextureGLTest::subImage2DQueryBuffer() {
     setTestCaseDescription(PixelStorage2DData[testCaseInstanceId()].name);
 
@@ -1727,6 +1881,38 @@ void TextureGLTest::compressedImage2DBuffer() {
 }
 #endif
 
+#ifndef MAGNUM_TARGET_GLES
+void TextureGLTest::compressedImage2DQueryView() {
+    setTestCaseDescription(CompressedPixelStorage2DData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+
+    if(CompressedPixelStorage2DData[testCaseInstanceId()].storage != CompressedPixelStorage{} && !Context::current().isExtensionSupported<Extensions::ARB::compressed_texture_pixel_storage>())
+        CORRADE_SKIP(Extensions::ARB::compressed_texture_pixel_storage::string() + std::string(" is not supported."));
+
+    Texture2D texture;
+    texture.setCompressedImage(0, CompressedImageView2D{
+        CompressedPixelStorage2DData[testCaseInstanceId()].storage,
+        CompressedPixelFormat::RGBAS3tcDxt3, Vector2i{4},
+        CompressedPixelStorage2DData[testCaseInstanceId()].dataSparse});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{CompressedPixelStorage2DData[testCaseInstanceId()].offset + 1*16};
+    MutableCompressedImageView2D image{CompressedPixelStorage2DData[testCaseInstanceId()].storage, CompressedPixelFormat::RGBAS3tcDxt3, Vector2i{4}, data};
+    texture.compressedImage(0, image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), Vector2i{4});
+
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(CompressedPixelStorage2DData[testCaseInstanceId()].offset),
+        CompressedPixelStorage2DData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+#endif
+
 /* Just 12x4 zeros compressed using RGBA DXT3 by the driver */
 constexpr UnsignedByte CompressedZero2D[3*16]{};
 
@@ -1856,6 +2042,36 @@ void TextureGLTest::compressedSubImage2DQuery() {
         TestSuite::Compare::Container);
 }
 
+void TextureGLTest::compressedSubImage2DQueryView() {
+    setTestCaseDescription(CompressedPixelStorage2DData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::ARB::get_texture_sub_image>())
+        CORRADE_SKIP(Extensions::ARB::get_texture_sub_image::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::EXT::texture_compression_s3tc>())
+        CORRADE_SKIP(Extensions::EXT::texture_compression_s3tc::string() + std::string(" is not supported."));
+    if(CompressedPixelStorage2DData[testCaseInstanceId()].storage != CompressedPixelStorage{} && !Context::current().isExtensionSupported<Extensions::ARB::compressed_texture_pixel_storage>())
+        CORRADE_SKIP(Extensions::ARB::compressed_texture_pixel_storage::string() + std::string(" is not supported."));
+    if(CompressedPixelStorage2DData[testCaseInstanceId()].storage == CompressedPixelStorage{} && !Context::current().isExtensionSupported<Extensions::ARB::internalformat_query2>())
+        CORRADE_SKIP(Extensions::ARB::internalformat_query2::string() + std::string(" is not supported."));
+
+    Texture2D texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBAS3tcDxt3, {12, 4})
+           .setCompressedSubImage(0, {}, CompressedImageView2D{CompressedPixelFormat::RGBAS3tcDxt3, {12, 4}, CompressedSubData2DComplete});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{CompressedPixelStorage2DData[testCaseInstanceId()].offset + 1*16};
+    MutableCompressedImageView2D image{CompressedPixelStorage2DData[testCaseInstanceId()].storage, CompressedPixelFormat::RGBAS3tcDxt3, Vector2i{4}, data};
+    texture.compressedSubImage(0, Range2Di::fromSize({4, 0}, Vector2i{4}), image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), Vector2i{4});
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(CompressedPixelStorage2DData[testCaseInstanceId()].offset),
+        CompressedPixelStorage2DData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+
 void TextureGLTest::compressedSubImage2DQueryBuffer() {
     setTestCaseDescription(CompressedPixelStorage2DData[testCaseInstanceId()].name);
 
@@ -1950,6 +2166,32 @@ void TextureGLTest::image3DBuffer() {
 }
 #endif
 
+#ifndef MAGNUM_TARGET_GLES
+void TextureGLTest::image3DQueryView() {
+    setTestCaseDescription(PixelStorage3DData[testCaseInstanceId()].name);
+
+    Texture3D texture;
+    texture.setImage(0, TextureFormat::RGBA8, ImageView3D{
+        PixelStorage3DData[testCaseInstanceId()].storage,
+        PixelFormat::RGBA, PixelType::UnsignedByte, Vector3i(2),
+        PixelStorage3DData[testCaseInstanceId()].dataSparse});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{PixelStorage3DData[testCaseInstanceId()].offset + 2*2*2*4};
+    MutableImageView3D image{PixelStorage3DData[testCaseInstanceId()].storage,
+        PixelFormat::RGBA, PixelType::UnsignedByte, Vector3i{2}, data};
+    texture.image(0, image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), Vector3i(2));
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(PixelStorage3DData[testCaseInstanceId()].offset),
+        PixelStorage3DData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+#endif
+
 constexpr UnsignedByte Zero3D[4*4*4*4]{};
 
 #ifndef MAGNUM_TARGET_GLES
@@ -2063,6 +2305,31 @@ void TextureGLTest::subImage3DQuery() {
         TestSuite::Compare::Container);
 }
 
+void TextureGLTest::subImage3DQueryView() {
+    setTestCaseDescription(PixelStorage3DData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::ARB::get_texture_sub_image>())
+        CORRADE_SKIP(Extensions::ARB::get_texture_sub_image::string() + std::string(" is not supported."));
+
+    Texture3D texture;
+    texture.setStorage(1, TextureFormat::RGBA8, Vector3i{4})
+           .setSubImage(0, {}, ImageView3D{PixelFormat::RGBA, PixelType::UnsignedByte, Vector3i{4}, SubData3DComplete});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{PixelStorage3DData[testCaseInstanceId()].offset + 2*2*2*4};
+    MutableImageView3D image{PixelStorage3DData[testCaseInstanceId()].storage,
+        PixelFormat::RGBA, PixelType::UnsignedByte, Vector3i{2}, data};
+    texture.subImage(0, Range3Di::fromSize(Vector3i{1}, Vector3i{2}), image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), Vector3i{2});
+    CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(PixelStorage3DData[testCaseInstanceId()].offset),
+        PixelStorage3DData[testCaseInstanceId()].data,
+        TestSuite::Compare::Container);
+}
+
 void TextureGLTest::subImage3DQueryBuffer() {
     setTestCaseDescription(PixelStorage3DData[testCaseInstanceId()].name);
 
@@ -2163,6 +2430,40 @@ void TextureGLTest::compressedImage3DBuffer() {
 }
 #endif
 
+#ifndef MAGNUM_TARGET_GLES
+void TextureGLTest::compressedImage3DQueryView() {
+    setTestCaseDescription(CompressedPixelStorage3DData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::ARB::texture_compression_bptc>())
+        CORRADE_SKIP(Extensions::ARB::texture_compression_bptc::string() + std::string(" is not supported."));
+    if(CompressedPixelStorage3DData[testCaseInstanceId()].storage != CompressedPixelStorage{} && !Context::current().isExtensionSupported<Extensions::ARB::compressed_texture_pixel_storage>())
+        CORRADE_SKIP(Extensions::ARB::compressed_texture_pixel_storage::string() + std::string(" is not supported."));
+
+    Texture3D texture;
+    texture.setCompressedImage(0, CompressedImageView3D{
+        CompressedPixelStorage3DData[testCaseInstanceId()].storage,
+        CompressedPixelFormat::RGBABptcUnorm, Vector3i{4},
+        CompressedPixelStorage3DData[testCaseInstanceId()].dataSparse});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{CompressedPixelStorage2DData[testCaseInstanceId()].offset + 64};
+    MutableCompressedImageView3D image{CompressedPixelStorage2DData[testCaseInstanceId()].storage, CompressedPixelFormat::RGBABptcUnorm, Vector3i{4}, data};
+    texture.compressedImage(0, image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), Vector3i{4});
+    {
+        CORRADE_EXPECT_FAIL_IF((Context::current().detectedDriver() & Context::DetectedDriver::Mesa) && CompressedPixelStorage3DData[testCaseInstanceId()].storage != CompressedPixelStorage{},
+            "Mesa drivers can't handle non-default compressed 3D pixel storage.");
+        CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(CompressedPixelStorage3DData[testCaseInstanceId()].offset),
+            CompressedPixelStorage3DData[testCaseInstanceId()].data,
+            TestSuite::Compare::Container);
+    }
+}
+#endif
+
 #ifndef MAGNUM_TARGET_GLES
 /* Just 12x4x4 zeros compressed using RGBA BPTC Unorm by the driver */
 constexpr UnsignedByte CompressedZero3D[3*4*16]{
@@ -2325,6 +2626,43 @@ void TextureGLTest::compressedSubImage3DQuery() {
     }
 }
 
+void TextureGLTest::compressedSubImage3DQueryView() {
+    setTestCaseDescription(CompressedPixelStorage3DData[testCaseInstanceId()].name);
+
+    if(!Context::current().isExtensionSupported<Extensions::ARB::get_texture_sub_image>())
+        CORRADE_SKIP(Extensions::ARB::get_texture_sub_image::string() + std::string(" is not supported."));
+    if(!Context::current().isExtensionSupported<Extensions::ARB::texture_compression_bptc>())
+        CORRADE_SKIP(Extensions::ARB::texture_compression_bptc::string() + std::string(" is not supported."));
+    if(CompressedPixelStorage3DData[testCaseInstanceId()].storage != CompressedPixelStorage{} && !Context::current().isExtensionSupported<Extensions::ARB::compressed_texture_pixel_storage>())
+        CORRADE_SKIP(Extensions::ARB::compressed_texture_pixel_storage::string() + std::string(" is not supported."));
+    if(CompressedPixelStorage3DData[testCaseInstanceId()].storage == CompressedPixelStorage{} && !Context::current().isExtensionSupported<Extensions::ARB::internalformat_query2>())
+        CORRADE_SKIP(Extensions::ARB::internalformat_query2::string() + std::string(" is not supported."));
+
+    Texture3D texture;
+    texture.setStorage(1, TextureFormat::CompressedRGBABptcUnorm, {12, 4, 4})
+           .setCompressedSubImage(0, {}, CompressedImageView3D{CompressedPixelFormat::RGBABptcUnorm, {12, 4, 4}, CompressedSubData3DComplete});
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    Containers::Array<char> data{CompressedPixelStorage2DData[testCaseInstanceId()].offset + 64};
+    MutableCompressedImageView3D image{CompressedPixelStorage2DData[testCaseInstanceId()].storage, CompressedPixelFormat::RGBABptcUnorm, Vector3i{4}, data};
+    texture.compressedSubImage(0, Range3Di::fromSize({4, 0, 0}, Vector3i{4}), image);
+
+    MAGNUM_VERIFY_NO_GL_ERROR();
+
+    CORRADE_COMPARE(image.size(), (Vector3i{4}));
+
+    {
+        CORRADE_EXPECT_FAIL_IF(CompressedPixelStorage3DData[testCaseInstanceId()].storage == CompressedPixelStorage{} && (Context::current().detectedDriver() & Context::DetectedDriver::NVidia),
+            "Default compressed pixel storage behaves weirdly with BPTC compression on NVidia.");
+        CORRADE_EXPECT_FAIL_IF((Context::current().detectedDriver() & Context::DetectedDriver::Mesa),
+            "Mesa drivers can't handle compressed 3D pixel storage for subimages.");
+        CORRADE_COMPARE_AS(Containers::arrayCast<UnsignedByte>(image.data()).suffix(CompressedPixelStorage3DData[testCaseInstanceId()].offset),
+            CompressedPixelStorage3DData[testCaseInstanceId()].data,
+            TestSuite::Compare::Container);
+    }
+}
+
 void TextureGLTest::compressedSubImage3DQueryBuffer() {
     setTestCaseDescription(CompressedPixelStorage3DData[testCaseInstanceId()].name);
 

src/Magnum/GL/Texture.h

@@ -754,8 +754,10 @@ template<UnsignedInt dimensions> class Texture: public AbstractTexture {
          *
          * Image parameters like format and type of pixel data are taken from
          * given image, image size is taken from the texture using
-         * @ref imageSize().  The storage is not reallocated if it is large
+         * @ref imageSize(). The storage is not reallocated if it is large
-         * enough to contain the new data.
+         * enough to contain the new data --- however if you want to read into
+         * existing memory or *ensure* a reallocation does not happen, use
+         * @ref image(Int, BasicMutableImageView<dimensions>&) instead.
          *
          * If @gl_extension{ARB,direct_state_access} (part of OpenGL 4.5) is
          * not available, the texture is bound before the operation (if not
@@ -785,6 +787,17 @@ template<UnsignedInt dimensions> class Texture: public AbstractTexture {
          */
         Image<dimensions> image(Int level, Image<dimensions>&& image);
 
+        /**
+         * @brief Read given texture mip level to an image view
+         *
+         * Compared to @ref image(Int, Image<dimensions>&) the function reads
+         * the pixels into the memory provided by @p image, expecting it's not
+         * @cpp nullptr @ce and its size is the same as size of given @p level.
+         */
+        void image(Int level, BasicMutableImageView<dimensions>& image) {
+            AbstractTexture::image<dimensions>(level, image);
+        }
+
         /**
          * @brief Read given texture mip level to a buffer image
          * @param level             Mip level
@@ -819,7 +832,10 @@ template<UnsignedInt dimensions> class Texture: public AbstractTexture {
          *
          * Compression format and data size are taken from the texture, image
          * size is taken using @ref imageSize(). The storage is not reallocated
-         * if it is large enough to contain the new data.
+         * if it is large enough to contain the new data --- however if you
+         * want to read into existing memory or *ensure* a reallocation does
+         * not happen, use @ref compressedImage(Int, BasicMutableCompressedImageView<dimensions>&)
+         * instead.
          *
          * If @gl_extension{ARB,direct_state_access} (part of OpenGL 4.5) is
          * not available, the texture is bound before the operation (if not
@@ -853,6 +869,18 @@ template<UnsignedInt dimensions> class Texture: public AbstractTexture {
          */
         CompressedImage<dimensions> compressedImage(Int level, CompressedImage<dimensions>&& image);
 
+        /**
+         * @brief Read given compressed texture mip level to an image view
+         *
+         * Compared to @ref compressedImage(Int, CompressedImage<dimensions>&)
+         * the function reads the pixels into the memory provided by @p image,
+         * expecting it's not @cpp nullptr @ce, its format is the same as
+         * texture format and its size is the same as size of given @p level.
+         */
+        void compressedImage(Int level, BasicMutableCompressedImageView<dimensions>& image) {
+            AbstractTexture::compressedImage<dimensions>(level, image);
+        }
+
         /**
          * @brief Read given compressed texture mip level to a buffer image
          * @param level             Mip level
@@ -890,7 +918,10 @@ template<UnsignedInt dimensions> class Texture: public AbstractTexture {
          *
          * Image parameters like format and type of pixel data are taken from
          * given image. The storage is not reallocated if it is large enough to
-         * contain the new data.
+         * contain the new data --- however if you want to read into existing
+         * memory or *ensure* a reallocation does not happen, use
+         * @ref subImage(Int, const RangeTypeFor<dimensions, Int>&, BasicMutableImageView<dimensions>&)
+         * instead.
          *
          * The operation is protected from buffer overflow.
          * @see @fn_gl_keyword{GetTextureSubImage}
@@ -910,6 +941,18 @@ template<UnsignedInt dimensions> class Texture: public AbstractTexture {
          */
         Image<dimensions> subImage(Int level, const RangeTypeFor<dimensions, Int>& range, Image<dimensions>&& image);
 
+        /**
+         * @brief Read a range of given texture mip level to an image view
+         *
+         * Compared to @ref subImage(Int, const RangeTypeFor<dimensions, Int>&, Image<dimensions>&)
+         * the function reads the pixels into the memory provided by @p image,
+         * expecting it's not @cpp nullptr @ce and its size is the same as
+         * @p range size.
+         */
+        void subImage(Int level, const RangeTypeFor<dimensions, Int>& range, BasicMutableImageView<dimensions>& image) {
+            AbstractTexture::subImage<dimensions>(level, range, image);
+        }
+
         /**
          * @brief Read a range of given texture mip level to a buffer image
          * @param level             Mip level
@@ -943,7 +986,12 @@ template<UnsignedInt dimensions> class Texture: public AbstractTexture {
          * @param range             Range to read
          * @param image             Image where to put the compressed data
          *
-         * Compression format and data size are taken from the texture.
+         * Compression format and data size are taken from the texture. The
+         * storage is not reallocated if it is large enough to contain the new
+         * data --- however if you want to read into existing memory or
+         * *ensure* a reallocation does not happen, use
+         * @ref compressedSubImage(Int, const RangeTypeFor<dimensions, Int>&, BasicMutableCompressedImageView<dimensions>&)
+         * instead.
          * @see @fn_gl2{GetTextureLevelParameter,GetTexLevelParameter},
          *      eventually @fn_gl{GetTexLevelParameter} with
          *      @def_gl{TEXTURE_INTERNAL_FORMAT}, then possibly
@@ -974,6 +1022,18 @@ template<UnsignedInt dimensions> class Texture: public AbstractTexture {
          */
         CompressedImage<dimensions> compressedSubImage(Int level, const RangeTypeFor<dimensions, Int>& range, CompressedImage<dimensions>&& image);
 
+        /**
+         * @brief Read a range of given compressed texture mip level to an image view
+         *
+         * Compared to @ref compressedSubImage(Int, const RangeTypeFor<dimensions, Int>&, CompressedImage<dimensions>&)
+         * the function reads the pixels into the memory provided by @p image,
+         * expecting it's not @cpp nullptr @ce, its format is the same as
+         * texture format and its size is the same as @p range size.
+         */
+        void compressedSubImage(Int level, const RangeTypeFor<dimensions, Int>& range, BasicMutableCompressedImageView<dimensions>& image) {
+            AbstractTexture::compressedSubImage<dimensions>(level, range, image);
+        }
+
         /**
          * @brief Read a range of given compressed texture mip level to a buffer image
          * @param level             Mip level

src/Magnum/GL/TextureArray.h

@@ -522,6 +522,17 @@ template<UnsignedInt dimensions> class TextureArray: public AbstractTexture {
          */
         Image<dimensions+1> image(Int level, Image<dimensions+1>&& image);
 
+        /**
+         * @brief Read given texture mip level to an image view
+         *
+         * Compared to @ref image(Int, Image<dimensions+1>&) the function reads
+         * the pixels into the memory provided by @p image, expecting it's not
+         * @cpp nullptr @ce and its size is the same as size of given @p level.
+         */
+        void image(Int level, BasicMutableImageView<dimensions+1>& image) {
+            AbstractTexture::image<dimensions+1>(level, image);
+        }
+
         /**
          * @brief Read given texture mip level to a buffer image
          *
@@ -566,6 +577,18 @@ template<UnsignedInt dimensions> class TextureArray: public AbstractTexture {
          */
         CompressedImage<dimensions+1> compressedImage(Int level, CompressedImage<dimensions+1>&& image);
 
+        /**
+         * @brief Read given compressed texture mip level to an image view
+         *
+         * Compared to @ref compressedImage(Int, CompressedImage<dimensions+1>&)
+         * the function reads the pixels into the memory provided by @p image,
+         * expecting it's not @cpp nullptr @ce, its format is the same as
+         * texture format and its size is the same as size of given @p level.
+         */
+        void compressedImage(Int level, BasicMutableCompressedImageView<dimensions+1>& image) {
+            AbstractTexture::compressedImage<dimensions+1>(level, image);
+        }
+
         /**
          * @brief Read given compressed texture mip level to a buffer image
          *
@@ -611,6 +634,18 @@ template<UnsignedInt dimensions> class TextureArray: public AbstractTexture {
          */
         Image<dimensions+1> subImage(Int level, const RangeTypeFor<dimensions+1, Int>& range, Image<dimensions+1>&& image);
 
+        /**
+         * @brief Read a range of given texture mip level to an image view
+         *
+         * Compared to @ref subImage(Int, const RangeTypeFor<dimensions+1, Int>&, Image<dimensions+1>&)
+         * the function reads the pixels into the memory provided by @p image,
+         * expecting it's not @cpp nullptr @ce and its size is the same as
+         * @p range size.
+         */
+        void subImage(Int level, const RangeTypeFor<dimensions+1, Int>& range, BasicMutableImageView<dimensions+1>& image) {
+            AbstractTexture::subImage<dimensions+1>(level, range, image);
+        }
+
         /**
          * @brief Read a range of given texture mip level to a buffer image
          *
@@ -661,6 +696,18 @@ template<UnsignedInt dimensions> class TextureArray: public AbstractTexture {
          */
         CompressedImage<dimensions+1> compressedSubImage(Int level, const RangeTypeFor<dimensions+1, Int>& range, CompressedImage<dimensions+1>&& image);
 
+        /**
+         * @brief Read a range of given compressed texture mip level to an image view
+         *
+         * Compared to @ref compressedSubImage(Int, const RangeTypeFor<dimensions+1, Int>&, CompressedImage<dimensions+1>&)
+         * the function reads the pixels into the memory provided by @p image,
+         * expecting it's not @cpp nullptr @ce, its format is the same as
+         * texture format and its size is the same as @p range size.
+         */
+        void compressedSubImage(Int level, const RangeTypeFor<dimensions+1, Int>& range, BasicMutableCompressedImageView<dimensions+1>& image) {
+            AbstractTexture::compressedSubImage<dimensions+1>(level, range, image);
+        }
+
         /**
          * @brief Read a range of given compressed texture mip level to a buffer image
          *