magnum/src/Magnum/Test/CubeMapTextureGLTest.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"
#ifndef MAGNUM_TARGET_GLES2
#include "Magnum/BufferImage.h"
#endif
#include "Magnum/Color.h"
#include "Magnum/ColorFormat.h"
#include "Magnum/CubeMapTexture.h"
#include "Magnum/Image.h"
#include "Magnum/TextureFormat.h"
#include "Magnum/Math/Range.h"
#include "Magnum/Test/AbstractOpenGLTester.h"

namespace Magnum { namespace Test {

struct CubeMapTextureGLTest: AbstractOpenGLTester {
    explicit CubeMapTextureGLTest();

    void construct();
    void wrap();

    void bind();

    void sampling();
    void samplingSRGBDecode();
    #ifndef MAGNUM_TARGET_GLES2
    void samplingSwizzle();
    #else
    void samplingMaxLevel();
    void samplingCompare();
    #endif
    #ifndef MAGNUM_TARGET_GLES
    void samplingBorderInteger();
    #endif
    #ifndef MAGNUM_TARGET_GLES2
    void samplingDepthStencilMode();
    #endif

    void storage();

    #ifndef MAGNUM_TARGET_GLES
    void imageFull();
    void imageFullBuffer();
    #endif
    void image();
    #ifndef MAGNUM_TARGET_GLES2
    void imageBuffer();
    #endif

    void subImage();
    #ifndef MAGNUM_TARGET_GLES2
    void subImageBuffer();
    #endif
    #ifndef MAGNUM_TARGET_GLES
    void subImageQuery();
    void subImageQueryBuffer();
    #endif

    void generateMipmap();

    void invalidateImage();
    void invalidateSubImage();
};

CubeMapTextureGLTest::CubeMapTextureGLTest() {
    addTests({&CubeMapTextureGLTest::construct,
              &CubeMapTextureGLTest::wrap,

              &CubeMapTextureGLTest::bind,

              &CubeMapTextureGLTest::sampling,
              &CubeMapTextureGLTest::samplingSRGBDecode,
              #ifndef MAGNUM_TARGET_GLES2
              &CubeMapTextureGLTest::samplingSwizzle,
              #else
              &CubeMapTextureGLTest::samplingMaxLevel,
              &CubeMapTextureGLTest::samplingCompare,
              #endif
              #ifndef MAGNUM_TARGET_GLES
              &CubeMapTextureGLTest::samplingBorderInteger,
              #endif
              #ifndef MAGNUM_TARGET_GLES2
              &CubeMapTextureGLTest::samplingDepthStencilMode,
              #endif

              &CubeMapTextureGLTest::storage,

              #ifndef MAGNUM_TARGET_GLES
              &CubeMapTextureGLTest::imageFull,
              &CubeMapTextureGLTest::imageFullBuffer,
              #endif
              &CubeMapTextureGLTest::image,
              #ifndef MAGNUM_TARGET_GLES2
              &CubeMapTextureGLTest::imageBuffer,
              #endif
              #ifndef MAGNUM_TARGET_GLES
              &CubeMapTextureGLTest::subImageQuery,
              &CubeMapTextureGLTest::subImageQueryBuffer,
              #endif

              &CubeMapTextureGLTest::subImage,
              #ifndef MAGNUM_TARGET_GLES2
              &CubeMapTextureGLTest::subImageBuffer,
              #endif

              &CubeMapTextureGLTest::generateMipmap,

              &CubeMapTextureGLTest::invalidateImage,
              &CubeMapTextureGLTest::invalidateSubImage});
}

void CubeMapTextureGLTest::construct() {
    {
        CubeMapTexture texture;

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

    MAGNUM_VERIFY_NO_ERROR();
}

void CubeMapTextureGLTest::wrap() {
    GLuint id;
    glGenTextures(1, &id);

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

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

void CubeMapTextureGLTest::bind() {
    CubeMapTexture 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();
}

void CubeMapTextureGLTest::sampling() {
    CubeMapTexture 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
           .setWrapping(Sampler::Wrapping::ClampToBorder)
           .setBorderColor(Color3(0.5f))
           .setMaxAnisotropy(Sampler::maxMaxAnisotropy())
            #ifndef MAGNUM_TARGET_GLES2
           .setCompareMode(Sampler::CompareMode::CompareRefToTexture)
           .setCompareFunction(Sampler::CompareFunction::GreaterOrEqual)
            #endif
           ;

   MAGNUM_VERIFY_NO_ERROR();
}

void CubeMapTextureGLTest::samplingSRGBDecode() {
    #ifdef MAGNUM_TARGET_GLES2
    if(!Context::current()->isExtensionSupported<Extensions::GL::EXT::sRGB>())
        CORRADE_SKIP(Extensions::GL::EXT::sRGB::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."));

    CubeMapTexture texture;
    texture.setSRGBDecode(false);

    MAGNUM_VERIFY_NO_ERROR();
}

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

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

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

    CubeMapTexture texture;
    texture.setMaxLevel(750);

    MAGNUM_VERIFY_NO_ERROR();
}

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

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

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

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

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

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

#ifndef MAGNUM_TARGET_GLES2
void CubeMapTextureGLTest::samplingDepthStencilMode() {
    #ifndef MAGNUM_TARGET_GLES
    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 not supported.");
    #endif

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

    MAGNUM_VERIFY_NO_ERROR();
}
#endif

void CubeMapTextureGLTest::storage() {
    CubeMapTexture texture;
    texture.setStorage(5, TextureFormat::RGBA8, Vector2i(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), Vector2i(32));
    CORRADE_COMPARE(texture.imageSize(1), Vector2i(16));
    CORRADE_COMPARE(texture.imageSize(2), Vector2i(8));
    CORRADE_COMPARE(texture.imageSize(3), Vector2i(4));
    CORRADE_COMPARE(texture.imageSize(4), Vector2i(2));
    /* Not available */
    CORRADE_COMPARE(texture.imageSize(5), Vector2i(0));

    MAGNUM_VERIFY_NO_ERROR();
    #endif
}

namespace {
    constexpr UnsignedByte DataFull[] = { 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,

                                          0x20, 0x21, 0x22, 0x23,
                                          0x24, 0x25, 0x26, 0x27,
                                          0x28, 0x29, 0x2a, 0x2b,
                                          0x2c, 0x2d, 0x2e, 0x2f,

                                          0x30, 0x31, 0x32, 0x33,
                                          0x34, 0x35, 0x36, 0x37,
                                          0x38, 0x39, 0x3a, 0x3b,
                                          0x3c, 0x3d, 0x3e, 0x3f,

                                          0x40, 0x41, 0x42, 0x43,
                                          0x44, 0x45, 0x46, 0x47,
                                          0x48, 0x49, 0x4a, 0x4b,
                                          0x4c, 0x4d, 0x4e, 0x4f,

                                          0x50, 0x51, 0x52, 0x53,
                                          0x54, 0x55, 0x56, 0x57,
                                          0x58, 0x59, 0x5a, 0x5b,
                                          0x5c, 0x5d, 0x5e, 0x5f };
}

#ifndef MAGNUM_TARGET_GLES
void CubeMapTextureGLTest::imageFull() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::direct_state_access>())
        CORRADE_SKIP(Extensions::GL::ARB::direct_state_access::string() + std::string(" is not supported."));

    CubeMapTexture texture;
    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{2, 2})
        .setSubImage(0, {}, ImageReference3D{ColorFormat::RGBA, ColorType::UnsignedByte, Vector3i{2, 2, 6}, DataFull});

    MAGNUM_VERIFY_NO_ERROR();

    Image3D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte});

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector3i(2, 2, 6));
    CORRADE_COMPARE_AS(
        Containers::ArrayReference<const UnsignedByte>(image.data<UnsignedByte>(), image.pixelSize()*image.size().product()),
        Containers::ArrayReference<const UnsignedByte>{DataFull}, TestSuite::Compare::Container);
}

void CubeMapTextureGLTest::imageFullBuffer() {
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::direct_state_access>())
        CORRADE_SKIP(Extensions::GL::ARB::direct_state_access::string() + std::string(" is not supported."));

    CubeMapTexture texture;
    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{2})
        .setSubImage(0, {}, BufferImage3D{ColorFormat::RGBA, ColorType::UnsignedByte, Vector3i{2, 2, 6}, DataFull, BufferUsage::StaticDraw});

    MAGNUM_VERIFY_NO_ERROR();

    BufferImage3D image = texture.image(0, {ColorFormat::RGBA, ColorType::UnsignedByte}, BufferUsage::StaticRead);

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector3i(2, 2, 6));
    const auto imageData = image.buffer().data<UnsignedByte>();
    CORRADE_COMPARE_AS(imageData, Containers::ArrayReference<const UnsignedByte>{DataFull}, TestSuite::Compare::Container);
}
#endif

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

void CubeMapTextureGLTest::image() {
    CubeMapTexture texture;
    texture.setImage(CubeMapTexture::Coordinate::PositiveX, 0, TextureFormat::RGBA8,
        ImageReference2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(2), Data));

    MAGNUM_VERIFY_NO_ERROR();

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    Image2D image = texture.image(CubeMapTexture::Coordinate::PositiveX, 0, {ColorFormat::RGBA, ColorType::UnsignedByte});

    MAGNUM_VERIFY_NO_ERROR();

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

#ifndef MAGNUM_TARGET_GLES2
void CubeMapTextureGLTest::imageBuffer() {
    CubeMapTexture texture;
    texture.setImage(CubeMapTexture::Coordinate::PositiveX, 0, TextureFormat::RGBA8,
        BufferImage2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(2), Data, BufferUsage::StaticDraw));

    MAGNUM_VERIFY_NO_ERROR();

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    BufferImage2D image = texture.image(CubeMapTexture::Coordinate::PositiveX, 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::ArrayReference<const UnsignedByte>{Data}, TestSuite::Compare::Container);
    #endif
}
#endif

namespace {
    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,
        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
    };
}

void CubeMapTextureGLTest::subImage() {
    CubeMapTexture texture;
    texture.setImage(CubeMapTexture::Coordinate::PositiveX, 0, TextureFormat::RGBA8,
        ImageReference2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(4), Zero));
    texture.setSubImage(CubeMapTexture::Coordinate::PositiveX, 0, Vector2i(1),
        ImageReference2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(2), Data));

    MAGNUM_VERIFY_NO_ERROR();

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    Image2D image = texture.image(CubeMapTexture::Coordinate::PositiveX, 0, {ColorFormat::RGBA, ColorType::UnsignedByte});

    MAGNUM_VERIFY_NO_ERROR();

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

#ifndef MAGNUM_TARGET_GLES2
void CubeMapTextureGLTest::subImageBuffer() {
    CubeMapTexture texture;
    texture.setImage(CubeMapTexture::Coordinate::PositiveX, 0, TextureFormat::RGBA8,
        ImageReference2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(4), Zero));
    texture.setSubImage(CubeMapTexture::Coordinate::PositiveX, 0, Vector2i(1),
        BufferImage2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(2), Data, BufferUsage::StaticDraw));

    MAGNUM_VERIFY_NO_ERROR();

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    BufferImage2D image = texture.image(CubeMapTexture::Coordinate::PositiveX, 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::ArrayReference<const UnsignedByte>{SubDataComplete}, TestSuite::Compare::Container);
    #endif
}
#endif

#ifndef MAGNUM_TARGET_GLES
void CubeMapTextureGLTest::subImageQuery() {
    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."));
    /* I'm too lazy to call setSubImage() six times */
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::direct_state_access>())
        CORRADE_SKIP(Extensions::GL::ARB::direct_state_access::string() + std::string(" is not supported."));

    CubeMapTexture texture;
    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{4})
           .setSubImage(0, {}, ImageReference3D{ColorFormat::RGBA, ColorType::UnsignedByte, {4, 4, 1}, SubDataComplete});

    MAGNUM_VERIFY_NO_ERROR();

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

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector3i(2, 2, 1));
    CORRADE_COMPARE_AS(
        Containers::ArrayReference<const UnsignedByte>(image.data<UnsignedByte>(), image.pixelSize()*image.size().product()),
        Containers::ArrayReference<const UnsignedByte>{Data}, TestSuite::Compare::Container);
}

void CubeMapTextureGLTest::subImageQueryBuffer() {
    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."));
    /* I'm too lazy to call setSubImage() six times */
    if(!Context::current()->isExtensionSupported<Extensions::GL::ARB::direct_state_access>())
        CORRADE_SKIP(Extensions::GL::ARB::direct_state_access::string() + std::string(" is not supported."));

    CubeMapTexture texture;
    texture.setStorage(1, TextureFormat::RGBA8, Vector2i{4})
           .setSubImage(0, {}, ImageReference3D{ColorFormat::RGBA, ColorType::UnsignedByte, {4, 4, 1}, SubDataComplete});

    MAGNUM_VERIFY_NO_ERROR();

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

    MAGNUM_VERIFY_NO_ERROR();

    CORRADE_COMPARE(image.size(), Vector3i(2, 2, 1));
    CORRADE_COMPARE_AS(imageData, Containers::ArrayReference<const UnsignedByte>{Data}, TestSuite::Compare::Container);
}
#endif

void CubeMapTextureGLTest::generateMipmap() {
    CubeMapTexture texture;
    texture.setImage(CubeMapTexture::Coordinate::PositiveX, 0, TextureFormat::RGBA8,
        ImageReference2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(32)));
    texture.setImage(CubeMapTexture::Coordinate::PositiveY, 0, TextureFormat::RGBA8,
        ImageReference2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(32)));
    texture.setImage(CubeMapTexture::Coordinate::PositiveZ, 0, TextureFormat::RGBA8,
        ImageReference2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(32)));
    texture.setImage(CubeMapTexture::Coordinate::NegativeX, 0, TextureFormat::RGBA8,
        ImageReference2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(32)));
    texture.setImage(CubeMapTexture::Coordinate::NegativeY, 0, TextureFormat::RGBA8,
        ImageReference2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(32)));
    texture.setImage(CubeMapTexture::Coordinate::NegativeZ, 0, TextureFormat::RGBA8,
        ImageReference2D(ColorFormat::RGBA, ColorType::UnsignedByte, Vector2i(32)));

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    CORRADE_COMPARE(texture.imageSize(0), Vector2i(32));
    CORRADE_COMPARE(texture.imageSize(1), Vector2i( 0));
    #endif

    texture.generateMipmap();

    MAGNUM_VERIFY_NO_ERROR();

    /** @todo How to test this on ES? */
    #ifndef MAGNUM_TARGET_GLES
    CORRADE_COMPARE(texture.imageSize(0), Vector2i(32));
    CORRADE_COMPARE(texture.imageSize(1), Vector2i(16));
    CORRADE_COMPARE(texture.imageSize(2), Vector2i( 8));
    CORRADE_COMPARE(texture.imageSize(3), Vector2i( 4));
    CORRADE_COMPARE(texture.imageSize(4), Vector2i( 2));
    CORRADE_COMPARE(texture.imageSize(5), Vector2i( 1));

    MAGNUM_VERIFY_NO_ERROR();
    #endif
}

void CubeMapTextureGLTest::invalidateImage() {
    CubeMapTexture texture;
    texture.setStorage(2, TextureFormat::RGBA8, Vector2i(32));
    texture.invalidateImage(1);

    MAGNUM_VERIFY_NO_ERROR();
}

void CubeMapTextureGLTest::invalidateSubImage() {
    CubeMapTexture texture;
    texture.setStorage(2, TextureFormat::RGBA8, Vector2i(32));
    texture.invalidateSubImage(1, Vector3i(2), Vector3i(Vector2i(8), 4));

    MAGNUM_VERIFY_NO_ERROR();
}

}}

CORRADE_TEST_MAIN(Magnum::Test::CubeMapTextureGLTest)