magnum/src/Magnum/Test/TextureArrayGLTest.cpp

/*
    This file is part of Magnum.

    Copyright © 2010, 2011, 2012, 2013, 2014, 2015
              Vladimír Vondruš <mosra@centrum.cz>

    Permission is hereby granted, free of charge, to any person obtaining a
    copy of this software and associated documentation files (the "Software"),
    to deal in the Software without restriction, including without limitation
    the rights to use, copy, modify, merge, publish, distribute, sublicense,
    and/or sell copies of the Software, and to permit persons to whom the
    Software is furnished to do so, subject to the following conditions:

    The above copyright notice and this permission notice shall be included
    in all copies or substantial portions of the Software.

    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
    DEALINGS IN THE SOFTWARE.
*/

#include <Corrade/TestSuite/Compare/Container.h>

#include "Magnum/configure.h"
#include "Magnum/BufferImage.h"
#include "Magnum/Color.h"
#include "Magnum/ColorFormat.h"
#include "Magnum/Image.h"
#include "Magnum/TextureArray.h"
#include "Magnum/TextureFormat.h"
#include "Magnum/Math/Range.h"
#include "Magnum/Test/AbstractOpenGLTester.h"

namespace Magnum { namespace Test {

struct TextureArrayGLTest: AbstractOpenGLTester {
    explicit TextureArrayGLTest();

    #ifndef MAGNUM_TARGET_GLES
    void construct1D();
    #endif
    void construct2D();

    #ifndef MAGNUM_TARGET_GLES
    void wrap1D();
    #endif
    void wrap2D();

    #ifndef MAGNUM_TARGET_GLES
    void bind1D();
    #endif
    void bind2D();

    #ifndef MAGNUM_TARGET_GLES
    void sampling1D();
    #endif
    void sampling2D();

    #ifndef MAGNUM_TARGET_GLES
    void samplingSRGBDecode1D();
    #endif
    void samplingSRGBDecode2D();

    #ifndef MAGNUM_TARGET_GLES2
    #ifndef MAGNUM_TARGET_GLES
    void samplingSwizzle1D();
    #endif
    void samplingSwizzle2D();
    #else
    void samplingMaxLevel2D();
    void samplingCompare2D();
    #endif

    #ifndef MAGNUM_TARGET_GLES
    void samplingBorderInteger1D();
    void samplingBorderInteger2D();
    void samplingDepthStencilMode1D();
    #endif
    #ifndef MAGNUM_TARGET_GLES2
    void samplingDepthStencilMode2D();
    #endif
    #ifdef MAGNUM_TARGET_GLES
    void samplingBorder2D();
    #endif

    #ifndef MAGNUM_TARGET_GLES
    void storage1D();
    #endif
    void storage2D();

    #ifndef MAGNUM_TARGET_GLES
    void image1D();
    void image1DBuffer();
    #endif
    #ifndef MAGNUM_TARGET_GLES2
    void image2D();
    void image2DBuffer();
    #endif

    #ifndef MAGNUM_TARGET_GLES
    void subImage1D();
    void subImage1DBuffer();
    void subImage1DQuery();
    void subImage1DQueryBuffer();
    #endif
    void subImage2D();
    void subImage2DBuffer();
    #ifndef MAGNUM_TARGET_GLES
    void subImage2DQuery();
    void subImage2DQueryBuffer();
    #endif

    #ifndef MAGNUM_TARGET_GLES
    void generateMipmap1D();
    #endif
    void generateMipmap2D();

    #ifndef MAGNUM_TARGET_GLES
    void invalidateImage1D();
    #endif
    void invalidateImage2D();

    #ifndef MAGNUM_TARGET_GLES
    void invalidateSubImage1D();
    #endif
    void invalidateSubImage2D();
};

TextureArrayGLTest::TextureArrayGLTest() {
    addTests({
        #ifndef MAGNUM_TARGET_GLES
        &TextureArrayGLTest::construct1D,
        #endif
        &TextureArrayGLTest::construct2D,

        #ifndef MAGNUM_TARGET_GLES
        &TextureArrayGLTest::wrap1D,
        #endif
        &TextureArrayGLTest::wrap2D,

        #ifndef MAGNUM_TARGET_GLES
        &TextureArrayGLTest::bind1D,
        #endif
        &TextureArrayGLTest::bind2D,

        #ifndef MAGNUM_TARGET_GLES
        &TextureArrayGLTest::sampling1D,
        #endif
        &TextureArrayGLTest::sampling2D,

        #ifndef MAGNUM_TARGET_GLES
        &TextureArrayGLTest::samplingSRGBDecode1D,
        #endif
        &TextureArrayGLTest::samplingSRGBDecode2D,

        #ifndef MAGNUM_TARGET_GLES2
        #ifndef MAGNUM_TARGET_GLES
        &TextureArrayGLTest::samplingSwizzle1D,
        #endif
        &TextureArrayGLTest::samplingSwizzle2D,
        #else
        &TextureArrayGLTest::samplingMaxLevel2D,
        #endif

        #ifndef MAGNUM_TARGET_GLES
        &TextureArrayGLTest::samplingBorderInteger1D,
        &TextureArrayGLTest::samplingBorderInteger2D,
        &TextureArrayGLTest::samplingDepthStencilMode1D,
        &TextureArrayGLTest::samplingDepthStencilMode2D,
        #else
        &TextureArrayGLTest::samplingBorder2D,
        #endif

        #ifndef MAGNUM_TARGET_GLES
        &TextureArrayGLTest::storage1D,
        #endif
        &TextureArrayGLTest::storage2D,

        #ifndef MAGNUM_TARGET_GLES
        &TextureArrayGLTest::image1D,
        &TextureArrayGLTest::image1DBuffer,
        #endif
        &TextureArrayGLTest::image2D,
        &TextureArrayGLTest::image2DBuffer,

        #ifndef MAGNUM_TARGET_GLES
        &TextureArrayGLTest::subImage1D,
        &TextureArrayGLTest::subImage1DBuffer,
        &TextureArrayGLTest::subImage1DQuery,
        &TextureArrayGLTest::subImage1DQueryBuffer,
        #endif
        &TextureArrayGLTest::subImage2D,
        &TextureArrayGLTest::subImage2DBuffer,
        #ifndef MAGNUM_TARGET_GLES
        &TextureArrayGLTest::subImage2DQuery,
        &TextureArrayGLTest::subImage2DQueryBuffer,
        #endif

        #ifndef MAGNUM_TARGET_GLES
        &TextureArrayGLTest::generateMipmap1D,
        #endif
        &TextureArrayGLTest::generateMipmap2D,

        #ifndef MAGNUM_TARGET_GLES
        &TextureArrayGLTest::invalidateImage1D,
        #endif
        &TextureArrayGLTest::invalidateImage2D,

        #ifndef MAGNUM_TARGET_GLES
        &TextureArrayGLTest::invalidateSubImage1D,
        #endif
        &TextureArrayGLTest::invalidateSubImage2D
    });
}

#ifndef MAGNUM_TARGET_GLES
void TextureArrayGLTest::construct1D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));

    {
        Texture1DArray texture;

        MAGNUM_VERIFY_NO_ERROR();
        CORRADE_VERIFY(texture.id() > 0);
    }

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

void TextureArrayGLTest::construct2D() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    #endif

    {
        Texture2DArray texture;

        MAGNUM_VERIFY_NO_ERROR();
        CORRADE_VERIFY(texture.id() > 0);
    }

    MAGNUM_VERIFY_NO_ERROR();
}

#ifndef MAGNUM_TARGET_GLES
void TextureArrayGLTest::wrap1D() {
    GLuint id;
    glGenTextures(1, &id);

    /* Releasing won't delete anything */
    {
        auto texture = Texture1DArray::wrap(id, ObjectFlag::DeleteOnDestruction);
        CORRADE_COMPARE(texture.release(), id);
    }

    /* ...so we can wrap it again */
    Texture1DArray::wrap(id);
    glDeleteTextures(1, &id);
}
#endif

void TextureArrayGLTest::wrap2D() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    #endif

    GLuint id;
    glGenTextures(1, &id);

    /* Releasing won't delete anything */
    {
        auto texture = Texture2DArray::wrap(id, ObjectFlag::DeleteOnDestruction);
        CORRADE_COMPARE(texture.release(), id);
    }

    /* ...so we can wrap it again */
    Texture2DArray::wrap(id);
    glDeleteTextures(1, &id);
}

#ifndef MAGNUM_TARGET_GLES
void TextureArrayGLTest::bind1D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));

    Texture1DArray texture;
    texture.bind(15);

    MAGNUM_VERIFY_NO_ERROR();

    AbstractTexture::unbind(15);

    MAGNUM_VERIFY_NO_ERROR();

    AbstractTexture::bind(7, {&texture, nullptr, &texture});

    MAGNUM_VERIFY_NO_ERROR();

    AbstractTexture::unbind(7, 3);

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

void TextureArrayGLTest::bind2D() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    #endif

    Texture2DArray texture;
    texture.bind(15);

    MAGNUM_VERIFY_NO_ERROR();

    AbstractTexture::unbind(15);

    MAGNUM_VERIFY_NO_ERROR();

    AbstractTexture::bind(7, {&texture, nullptr, &texture});

    MAGNUM_VERIFY_NO_ERROR();

    AbstractTexture::unbind(7, 3);

    MAGNUM_VERIFY_NO_ERROR();
}

#ifndef MAGNUM_TARGET_GLES
void TextureArrayGLTest::sampling1D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));

    Texture1DArray texture;
    texture.setMinificationFilter(Sampler::Filter::Linear, Sampler::Mipmap::Linear)
           .setMagnificationFilter(Sampler::Filter::Linear)
           .setMinLod(-750.0f)
           .setMaxLod(750.0f)
           .setLodBias(0.5f)
           .setBaseLevel(1)
           .setMaxLevel(750)
           .setWrapping(Sampler::Wrapping::ClampToBorder)
           .setBorderColor(Color3(0.5f))
           .setMaxAnisotropy(Sampler::maxMaxAnisotropy())
           .setCompareMode(Sampler::CompareMode::CompareRefToTexture)
           .setCompareFunction(Sampler::CompareFunction::GreaterOrEqual);

    MAGNUM_VERIFY_NO_ERROR();
}

void TextureArrayGLTest::samplingSRGBDecode1D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_sRGB_decode>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_sRGB_decode::string() + std::string(" is not supported."));

    Texture1DArray texture;
    texture.setSRGBDecode(false);

    MAGNUM_VERIFY_NO_ERROR();
}

void TextureArrayGLTest::samplingSwizzle1D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::texture_swizzle>())
        CORRADE_SKIP(Extensions::GL::ARB::texture_swizzle::string() + std::string(" is not supported."));

    Texture1DArray texture;
    texture.setSwizzle<'b', 'g', 'r', '0'>();

    MAGNUM_VERIFY_NO_ERROR();
}

void TextureArrayGLTest::samplingBorderInteger1D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_integer>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_integer::string() + std::string(" is not supported."));

    Texture1DArray a;
    a.setWrapping(Sampler::Wrapping::ClampToBorder)
     .setBorderColor(Vector4i(1, 56, 78, -2));
    Texture1DArray b;
    b.setWrapping(Sampler::Wrapping::ClampToBorder)
     .setBorderColor(Vector4ui(35, 56, 78, 15));

    MAGNUM_VERIFY_NO_ERROR();
}

void TextureArrayGLTest::samplingDepthStencilMode1D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::stencil_texturing>())
        CORRADE_SKIP(Extensions::GL::ARB::stencil_texturing::string() + std::string(" is not supported."));

    Texture1DArray texture;
    texture.setDepthStencilMode(Sampler::DepthStencilMode::StencilIndex);

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

void TextureArrayGLTest::sampling2D() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    #endif

    Texture2DArray texture;
    texture.setMinificationFilter(Sampler::Filter::Linear, Sampler::Mipmap::Linear)
           .setMagnificationFilter(Sampler::Filter::Linear)
           #ifndef MAGNUM_TARGET_GLES2
           .setMinLod(-750.0f)
           .setMaxLod(750.0f)
           #ifndef MAGNUM_TARGET_GLES
           .setLodBias(0.5f)
           #endif
           .setBaseLevel(1)
           .setMaxLevel(750)
           #endif
           #ifndef MAGNUM_TARGET_GLES
           .setWrapping(Sampler::Wrapping::ClampToBorder)
           .setBorderColor(Color3(0.5f))
           #else
           .setWrapping(Sampler::Wrapping::ClampToEdge)
           #endif
           .setMaxAnisotropy(Sampler::maxMaxAnisotropy())
           #ifndef MAGNUM_TARGET_GLES
           .setCompareMode(Sampler::CompareMode::CompareRefToTexture)
           .setCompareFunction(Sampler::CompareFunction::GreaterOrEqual)
           #endif
           ;

    MAGNUM_VERIFY_NO_ERROR();
}

void TextureArrayGLTest::samplingSRGBDecode2D() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    #endif
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_sRGB_decode>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_sRGB_decode::string() + std::string(" is not supported."));

    Texture2DArray texture;
    texture.setSRGBDecode(false);

    MAGNUM_VERIFY_NO_ERROR();
}

#ifndef MAGNUM_TARGET_GLES2
void TextureArrayGLTest::samplingSwizzle2D() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::texture_swizzle>())
        CORRADE_SKIP(Extensions::GL::ARB::texture_swizzle::string() + std::string(" is not supported."));
    #endif

    Texture2DArray texture;
    texture.setSwizzle<'b', 'g', 'r', '0'>();

    MAGNUM_VERIFY_NO_ERROR();
}
#else
void TextureArrayGLTest::samplingMaxLevel2D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::APPLE::texture_max_level>())
        CORRADE_SKIP(Extensions::GL::APPLE::texture_max_level::string() + std::string(" is not supported."));

    Texture2DArray texture;
    texture.setMaxLevel(750);

    MAGNUM_VERIFY_NO_ERROR();
}

void TextureArrayGLTest::samplingCompare2D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::shadow_samplers>() ||
       !Context::current()->isExtensionSupported<Extensions::GL::NV::shadow_samplers_array>())
        CORRADE_SKIP(Extensions::GL::NV::shadow_samplers_array::string() + std::string(" is not supported."));

    Texture2DArray texture;
    texture.setCompareMode(Sampler::CompareMode::CompareRefToTexture)
           .setCompareFunction(Sampler::CompareFunction::GreaterOrEqual);

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

#ifndef MAGNUM_TARGET_GLES
void TextureArrayGLTest::samplingBorderInteger2D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_integer>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_integer::string() + std::string(" is not supported."));

    Texture2DArray a;
    a.setWrapping(Sampler::Wrapping::ClampToBorder)
     .setBorderColor(Vector4i(1, 56, 78, -2));
    Texture2DArray b;
    b.setWrapping(Sampler::Wrapping::ClampToBorder)
     .setBorderColor(Vector4ui(35, 56, 78, 15));

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

#ifndef MAGNUM_TARGET_GLES2
void TextureArrayGLTest::samplingDepthStencilMode2D() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::stencil_texturing>())
        CORRADE_SKIP(Extensions::GL::ARB::stencil_texturing::string() + std::string(" is not supported."));
    #else
    if(!Context::current()->isVersionSupported(Version::GLES310))
        CORRADE_SKIP("OpenGL ES 3.1 is not supported.");
    #endif

    Texture2DArray texture;
    texture.setDepthStencilMode(Sampler::DepthStencilMode::StencilIndex);

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

#ifdef MAGNUM_TARGET_GLES
void TextureArrayGLTest::samplingBorder2D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::NV::texture_border_clamp>())
        CORRADE_SKIP(Extensions::GL::NV::texture_border_clamp::string() + std::string(" is not supported."));

    Texture2DArray texture;
    texture.setWrapping(Sampler::Wrapping::ClampToBorder)
           .setBorderColor(Color3(0.5f));

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

#ifndef MAGNUM_TARGET_GLES
void TextureArrayGLTest::storage1D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));

    Texture1DArray texture;
    texture.setStorage(5, TextureFormat::RGBA8, Vector2i(32));

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(texture.imageSize(0), Vector2i(32, 32));
    CORRADE_COMPARE(texture.imageSize(1), Vector2i(16, 32));
    CORRADE_COMPARE(texture.imageSize(2), Vector2i( 8, 32));
    CORRADE_COMPARE(texture.imageSize(3), Vector2i( 4, 32));
    CORRADE_COMPARE(texture.imageSize(4), Vector2i( 2, 32));
    CORRADE_COMPARE(texture.imageSize(5), Vector2i( 0,  0)); /* not available */

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

void TextureArrayGLTest::storage2D() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    #endif

    Texture2DArray texture;
    texture.setStorage(5, TextureFormat::RGBA8, Vector3i(32));

    MAGNUM_VERIFY_NO_ERROR();

    #ifndef MAGNUM_TARGET_GLES2
    #ifdef MAGNUM_TARGET_GLES
    if(!Context::current()->isVersionSupported(Version::GLES310))
        CORRADE_SKIP("OpenGL ES 3.1 not supported, skipping image size testing");
    #endif

    CORRADE_COMPARE(texture.imageSize(0), Vector3i(32, 32, 32));
    CORRADE_COMPARE(texture.imageSize(1), Vector3i(16, 16, 32));
    CORRADE_COMPARE(texture.imageSize(2), Vector3i( 8,  8, 32));
    CORRADE_COMPARE(texture.imageSize(3), Vector3i( 4,  4, 32));
    CORRADE_COMPARE(texture.imageSize(4), Vector3i( 2,  2, 32));
    CORRADE_COMPARE(texture.imageSize(5), Vector3i( 0,  0,  0)); /* not available */

    MAGNUM_VERIFY_NO_ERROR();
    #endif
}

namespace {
    constexpr UnsignedByte Data1D[] = { 0x00, 0x01, 0x02, 0x03,
                                        0x04, 0x05, 0x06, 0x07,
                                        0x08, 0x09, 0x0a, 0x0b,
                                        0x0c, 0x0d, 0x0e, 0x0f };
}

#ifndef MAGNUM_TARGET_GLES
void TextureArrayGLTest::image1D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));

    Texture1DArray texture;
    texture.setImage(0, TextureFormat::RGBA8,
        ImageReference2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(2), Data1D));

    MAGNUM_VERIFY_NO_ERROR();

    Image2D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte});

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector2i(2));
    CORRADE_COMPARE_AS(
        Containers::ArrayView<const UnsignedByte>(image.data<UnsignedByte>(), image.pixelSize()*image.size().product()),
        Containers::ArrayView<const UnsignedByte>{Data1D}, TestSuite::Compare::Container);
}

void TextureArrayGLTest::image1DBuffer() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));

    Texture1DArray texture;
    texture.setImage(0, TextureFormat::RGBA8,
        BufferImage2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(2), Data1D, BufferUsage::StaticDraw));

    MAGNUM_VERIFY_NO_ERROR();

    BufferImage2D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte}, BufferUsage::StaticRead);
    const auto imageData = image.buffer().data<UnsignedByte>();

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector2i(2));
    CORRADE_COMPARE_AS(imageData, Containers::ArrayView<const UnsignedByte>{Data1D}, TestSuite::Compare::Container);
}
#endif

namespace {
    constexpr UnsignedByte Data2D[] = { 0x00, 0x01, 0x02, 0x03,
                                        0x04, 0x05, 0x06, 0x07,
                                        0x08, 0x09, 0x0a, 0x0b,
                                        0x0c, 0x0d, 0x0e, 0x0f,
                                        0x10, 0x11, 0x12, 0x13,
                                        0x14, 0x15, 0x16, 0x17,
                                        0x18, 0x19, 0x1a, 0x1b,
                                        0x1c, 0x1d, 0x1e, 0x1f };
}

void TextureArrayGLTest::image2D() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    #endif

    Texture2DArray texture;
    texture.setImage(0, TextureFormat::RGBA8,
        ImageReference3D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector3i(2), Data2D));

    MAGNUM_VERIFY_NO_ERROR();

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    Image3D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte});

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector3i(2));
    CORRADE_COMPARE_AS(
        Containers::ArrayView<const UnsignedByte>(image.data<UnsignedByte>(), image.pixelSize()*image.size().product()),
        Containers::ArrayView<const UnsignedByte>{Data2D}, TestSuite::Compare::Container);
    #endif
}

void TextureArrayGLTest::image2DBuffer() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    #endif

    Texture2DArray texture;
    texture.setImage(0, TextureFormat::RGBA8,
        BufferImage3D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector3i(2), Data2D, BufferUsage::StaticDraw));

    MAGNUM_VERIFY_NO_ERROR();

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    BufferImage3D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte}, BufferUsage::StaticRead);
    const auto imageData = image.buffer().data<UnsignedByte>();

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector3i(2));
    CORRADE_COMPARE_AS(imageData, Containers::ArrayView<const UnsignedByte>{Data2D}, TestSuite::Compare::Container);
    #endif
}

namespace {
    constexpr UnsignedByte Zero1D[4*4*4] = {};
    constexpr UnsignedByte SubData1D[] = { 0x00, 0x01, 0x02, 0x03,
                                           0x04, 0x05, 0x06, 0x07,
                                           0x08, 0x09, 0x0a, 0x0b,
                                           0x0c, 0x0d, 0x0e, 0x0f };
    constexpr UnsignedByte SubData1DComplete[] = {
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
        0, 0, 0, 0, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0, 0, 0, 0,
        0, 0, 0, 0, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0, 0, 0, 0,
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0
    };
}

#ifndef MAGNUM_TARGET_GLES
void TextureArrayGLTest::subImage1D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));

    Texture1DArray texture;
    texture.setImage(0, TextureFormat::RGBA8,
        ImageReference2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(4), Zero1D));
    texture.setSubImage(0, Vector2i(1),
        ImageReference2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(2), SubData1D));

    MAGNUM_VERIFY_NO_ERROR();

    Image2D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte});

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector2i(4));
    CORRADE_COMPARE_AS(
        Containers::ArrayView<const UnsignedByte>(image.data<UnsignedByte>(), image.pixelSize()*image.size().product()),
        Containers::ArrayView<const UnsignedByte>{SubData1DComplete}, TestSuite::Compare::Container);
}

void TextureArrayGLTest::subImage1DBuffer() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));

    Texture1DArray texture;
    texture.setImage(0, TextureFormat::RGBA8,
        ImageReference2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(4), Zero1D));
    texture.setSubImage(0, Vector2i(1),
        BufferImage2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(2), SubData1D, BufferUsage::StaticDraw));

    MAGNUM_VERIFY_NO_ERROR();

    BufferImage2D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte}, BufferUsage::StaticRead);
    const auto imageData = image.buffer().data<UnsignedByte>();

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector2i(4));
    CORRADE_COMPARE_AS(imageData, Containers::ArrayView<const UnsignedByte>{SubData1DComplete}, TestSuite::Compare::Container);
}

void TextureArrayGLTest::subImage1DQuery() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::get_texture_sub_image>())
        CORRADE_SKIP(Extensions::GL::ARB::get_texture_sub_image::string() + std::string(" is not supported."));

    Texture1DArray texture;
    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{4})
           .setSubImage(0, {}, ImageReference2D{ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i{4}, SubData1DComplete});

    MAGNUM_VERIFY_NO_ERROR();

    Image2D image = texture.subImage(0, Range2Di::fromSize(Vector2i{1}, Vector2i{2}), {ColorFormat::RGBA, ColorType::UnsignedByte});

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector2i{2});
    CORRADE_COMPARE_AS(
        Containers::ArrayView<const UnsignedByte>(image.data<UnsignedByte>(), image.pixelSize()*image.size().product()), Containers::ArrayView<const UnsignedByte>{Data1D}, TestSuite::Compare::Container);
}

void TextureArrayGLTest::subImage1DQueryBuffer() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::get_texture_sub_image>())
        CORRADE_SKIP(Extensions::GL::ARB::get_texture_sub_image::string() + std::string(" is not supported."));

    Texture1DArray texture;
    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{4})
           .setSubImage(0, {}, ImageReference2D{ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i{4}, SubData1DComplete});

    MAGNUM_VERIFY_NO_ERROR();

    BufferImage2D image = texture.subImage(0, Range2Di::fromSize(Vector2i{1}, Vector2i{2}), {ColorFormat::RGBA, ColorType::UnsignedByte}, BufferUsage::StaticRead);
    const auto imageData = image.buffer().data<UnsignedByte>();

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector2i{2});
    CORRADE_COMPARE_AS(imageData, Containers::ArrayView<const UnsignedByte>{Data1D}, TestSuite::Compare::Container);
}
#endif

namespace {
    constexpr UnsignedByte Zero2D[4*4*4*4] = {};
    constexpr UnsignedByte SubData2D[] = { 0x00, 0x01, 0x02, 0x03,
                                           0x04, 0x05, 0x06, 0x07,
                                           0x08, 0x09, 0x0a, 0x0b,
                                           0x0c, 0x0d, 0x0e, 0x0f,
                                           0x10, 0x11, 0x12, 0x13,
                                           0x14, 0x15, 0x16, 0x17,
                                           0x18, 0x19, 0x1a, 0x1b,
                                           0x1c, 0x1d, 0x1e, 0x1f };
    constexpr UnsignedByte SubData2DComplete[] = {
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,

        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
        0, 0, 0, 0, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0, 0, 0, 0,
        0, 0, 0, 0, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0, 0, 0, 0,
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,

        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
        0, 0, 0, 0, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0, 0, 0, 0,
        0, 0, 0, 0, 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0, 0, 0, 0,
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,

        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0,
        0, 0, 0, 0,    0,    0,    0,    0,    0,    0,    0,    0, 0, 0, 0, 0
    };
}

void TextureArrayGLTest::subImage2D() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    #endif

    Texture2DArray texture;
    texture.setImage(0, TextureFormat::RGBA8,
        ImageReference3D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector3i(4), Zero2D));
    texture.setSubImage(0, Vector3i(1),
        ImageReference3D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector3i(2), SubData2D));

    MAGNUM_VERIFY_NO_ERROR();

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    Image3D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte});

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector3i(4));
    CORRADE_COMPARE_AS(
        Containers::ArrayView<const UnsignedByte>(image.data<UnsignedByte>(), image.pixelSize()*image.size().product()), Containers::ArrayView<const UnsignedByte>{SubData2DComplete}, TestSuite::Compare::Container);
    #endif
}

void TextureArrayGLTest::subImage2DBuffer() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    #endif

    Texture2DArray texture;
    texture.setImage(0, TextureFormat::RGBA8,
        ImageReference3D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector3i(4), Zero2D));
    texture.setSubImage(0, Vector3i(1),
        BufferImage3D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector3i(2), SubData2D, BufferUsage::StaticDraw));

    MAGNUM_VERIFY_NO_ERROR();

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    BufferImage3D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte}, BufferUsage::StaticRead);
    const auto imageData = image.buffer().data<UnsignedByte>();

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector3i(4));
    CORRADE_COMPARE_AS(imageData, Containers::ArrayView<const UnsignedByte>{SubData2DComplete}, TestSuite::Compare::Container);
    #endif
}

#ifndef MAGNUM_TARGET_GLES
void TextureArrayGLTest::subImage2DQuery() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::get_texture_sub_image>())
        CORRADE_SKIP(Extensions::GL::ARB::get_texture_sub_image::string() + std::string(" is not supported."));

    Texture2DArray texture;
    texture.setStorage(1, TextureFormat::RGBA8, Vector3i{4})
           .setSubImage(0, {}, ImageReference3D{ColorFormat::RGBA, ColorType::UnsignedByte, Vector3i{4}, SubData2DComplete});

    MAGNUM_VERIFY_NO_ERROR();

    Image3D image = texture.subImage(0, Range3Di::fromSize(Vector3i{1}, Vector3i{2}), {ColorFormat::RGBA, ColorType::UnsignedByte});

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector3i{2});
    CORRADE_COMPARE_AS(
        Containers::ArrayView<const UnsignedByte>(image.data<UnsignedByte>(), image.pixelSize()*image.size().product()), Containers::ArrayView<const UnsignedByte>{Data2D}, TestSuite::Compare::Container);
}

void TextureArrayGLTest::subImage2DQueryBuffer() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::get_texture_sub_image>())
        CORRADE_SKIP(Extensions::GL::ARB::get_texture_sub_image::string() + std::string(" is not supported."));

    Texture2DArray texture;
    texture.setStorage(1, TextureFormat::RGBA8, Vector3i{4})
           .setSubImage(0, {}, ImageReference3D{ColorFormat::RGBA, ColorType::UnsignedByte, Vector3i{4}, SubData2DComplete});

    MAGNUM_VERIFY_NO_ERROR();

    BufferImage3D image = texture.subImage(0, Range3Di::fromSize(Vector3i{1}, Vector3i{2}), {ColorFormat::RGBA, ColorType::UnsignedByte}, BufferUsage::StaticRead);
    const auto imageData = image.buffer().data<UnsignedByte>();

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector3i{2});
    CORRADE_COMPARE_AS(imageData, Containers::ArrayView<const UnsignedByte>{Data2D}, TestSuite::Compare::Container);
}

void TextureArrayGLTest::generateMipmap1D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::framebuffer_object>())
        CORRADE_SKIP(Extensions::GL::ARB::framebuffer_object::string() + std::string(" is not supported."));
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));

    Texture1DArray texture;
    texture.setImage(0, TextureFormat::RGBA8,
        ImageReference2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(32)));

    CORRADE_COMPARE(texture.imageSize(0), Vector2i(32));
    CORRADE_COMPARE(texture.imageSize(1), Vector2i( 0));

    texture.generateMipmap();

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(texture.imageSize(0), Vector2i(32, 32));
    CORRADE_COMPARE(texture.imageSize(1), Vector2i(16, 32));
    CORRADE_COMPARE(texture.imageSize(2), Vector2i( 8, 32));
    CORRADE_COMPARE(texture.imageSize(3), Vector2i( 4, 32));
    CORRADE_COMPARE(texture.imageSize(4), Vector2i( 2, 32));
    CORRADE_COMPARE(texture.imageSize(5), Vector2i( 1, 32));

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

void TextureArrayGLTest::generateMipmap2D() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::framebuffer_object>())
        CORRADE_SKIP(Extensions::GL::ARB::framebuffer_object::string() + std::string(" is not supported."));
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    #endif

    Texture2DArray texture;
    texture.setImage(0, TextureFormat::RGBA8,
        ImageReference3D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector3i(32)));

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    CORRADE_COMPARE(texture.imageSize(0), Vector3i(32));
    CORRADE_COMPARE(texture.imageSize(1), Vector3i( 0));
    #endif

    texture.generateMipmap();

    MAGNUM_VERIFY_NO_ERROR();

    #ifndef MAGNUM_TARGET_GLES
    CORRADE_COMPARE(texture.imageSize(0), Vector3i(32, 32, 32));
    CORRADE_COMPARE(texture.imageSize(1), Vector3i(16, 16, 32));
    CORRADE_COMPARE(texture.imageSize(2), Vector3i( 8,  8, 32));
    CORRADE_COMPARE(texture.imageSize(3), Vector3i( 4,  4, 32));
    CORRADE_COMPARE(texture.imageSize(4), Vector3i( 2,  2, 32));
    CORRADE_COMPARE(texture.imageSize(5), Vector3i( 1,  1, 32));

    MAGNUM_VERIFY_NO_ERROR();
    #endif
}

#ifndef MAGNUM_TARGET_GLES
void TextureArrayGLTest::invalidateImage1D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));

    Texture1DArray texture;
    texture.setStorage(2, TextureFormat::RGBA8, Vector2i(32));
    texture.invalidateImage(1);

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

void TextureArrayGLTest::invalidateImage2D() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    #endif

    Texture2DArray texture;
    texture.setStorage(2, TextureFormat::RGBA8, Vector3i(32));
    texture.invalidateImage(1);

    MAGNUM_VERIFY_NO_ERROR();
}

#ifndef MAGNUM_TARGET_GLES
void TextureArrayGLTest::invalidateSubImage1D() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));

    Texture1DArray texture;
    texture.setStorage(2, TextureFormat::RGBA8, Vector2i(32));
    texture.invalidateSubImage(1, Vector2i(2), Vector2i(8));

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

void TextureArrayGLTest::invalidateSubImage2D() {
    #ifndef MAGNUM_TARGET_GLES
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::texture_array>())
        CORRADE_SKIP(Extensions::GL::EXT::texture_array::string() + std::string(" is not supported."));
    #endif

    Texture2DArray texture;
    texture.setStorage(2, TextureFormat::RGBA8, Vector3i(32));
    texture.invalidateSubImage(1, Vector3i(2), Vector3i(8));

    MAGNUM_VERIFY_NO_ERROR();
}

}}

CORRADE_TEST_MAIN(Magnum::Test::TextureArrayGLTest)