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magnum/src/Magnum/TextureTools/Test/DistanceFieldGLTest.cpp

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/*
This file is part of Magnum.
Copyright © 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019,
2020, 2021, 2022, 2023, 2024, 2025
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/Containers/StridedArrayView.h>
#include <Corrade/Containers/String.h>
#include <Corrade/PluginManager/AbstractManager.h>
#include <Corrade/Utility/Algorithms.h>
#include <Corrade/Utility/Path.h>
#ifdef CORRADE_TARGET_APPLE
#include <Corrade/Utility/System.h> /* isSandboxed() */
#endif
#include "Magnum/Image.h"
#include "Magnum/ImageView.h"
#include "Magnum/PixelFormat.h"
#include "Magnum/Math/Color.h"
#include "Magnum/Math/Range.h"
#include "Magnum/DebugTools/CompareImage.h"
#include "Magnum/DebugTools/TextureImage.h"
#include "Magnum/GL/Context.h"
#include "Magnum/GL/Extensions.h"
#include "Magnum/GL/Framebuffer.h"
#include "Magnum/GL/OpenGLTester.h"
#include "Magnum/GL/PixelFormat.h"
#include "Magnum/GL/Texture.h"
#include "Magnum/GL/TextureFormat.h"
#include "Magnum/TextureTools/DistanceFieldGL.h"
#include "Magnum/Trade/AbstractImporter.h"
#include "Magnum/Trade/ImageData.h"
#include "configure.h"
namespace Magnum { namespace TextureTools { namespace Test { namespace {
struct DistanceFieldGLTest: GL::OpenGLTester {
explicit DistanceFieldGLTest();
void construct();
void constructCopy();
void constructMove();
void run();
void formatNotDrawable();
void sizeRatioNotMultipleOfTwo();
#ifndef MAGNUM_TARGET_WEBGL
void benchmark();
#endif
private:
PluginManager::Manager<Trade::AbstractImporter> _manager{"nonexistent"};
Containers::String _testDir;
};
using namespace Math::Literals;
const struct {
const char* name;
bool framebuffer;
Vector2i size;
Vector2i offset;
bool flipX, flipY;
} RunData[]{
{"texture output",
false, {64, 64}, {}, false, false},
{"texture output, flipped on X",
false, {64, 64}, {}, true, false},
{"texture output, flipped on Y",
false, {64, 64}, {}, false, true},
{"texture output, with offset",
false, {128, 96}, {64, 32}, false, false},
{"framebuffer output",
true, {64, 64}, {}, false, false},
{"framebuffer output, flipped on X",
true, {64, 64}, {}, true, false},
{"framebuffer output, flipped on Y",
true, {64, 64}, {}, false, true},
{"framebuffer output, with offset",
true, {128, 96}, {64, 32}, false, false},
};
#ifndef MAGNUM_TARGET_WEBGL
const struct {
const char* name;
GL::TextureFormat format;
} BenchmarkData[]{
/* On ES2 the format selection is too annoying, just skip the variants
altogether and pick *some* format in the function itself */
#ifdef MAGNUM_TARGET_GLES2
{"", GL::TextureFormat{}},
#else
{"R8 output", GL::TextureFormat::R8},
{"RGB8 output", GL::TextureFormat::RGB8},
{"RGBA8 output", GL::TextureFormat::RGBA8},
{"R16 output", GL::TextureFormat::R16},
#endif
};
#endif
DistanceFieldGLTest::DistanceFieldGLTest() {
addTests({&DistanceFieldGLTest::construct,
&DistanceFieldGLTest::constructCopy,
&DistanceFieldGLTest::constructMove});
addInstancedTests({&DistanceFieldGLTest::run},
Containers::arraySize(RunData));
addTests({&DistanceFieldGLTest::formatNotDrawable,
&DistanceFieldGLTest::sizeRatioNotMultipleOfTwo});
#ifndef MAGNUM_TARGET_WEBGL
addInstancedBenchmarks({&DistanceFieldGLTest::benchmark}, 10,
Containers::arraySize(BenchmarkData),
BenchmarkType::GpuTime);
#endif
/* Load the plugin directly from the build tree. Otherwise it's either
static and already loaded or not present in the build tree */
#ifdef ANYIMAGEIMPORTER_PLUGIN_FILENAME
CORRADE_INTERNAL_ASSERT_OUTPUT(_manager.load(ANYIMAGEIMPORTER_PLUGIN_FILENAME) & PluginManager::LoadState::Loaded);
#endif
#ifdef TGAIMPORTER_PLUGIN_FILENAME
CORRADE_INTERNAL_ASSERT_OUTPUT(_manager.load(TGAIMPORTER_PLUGIN_FILENAME) & PluginManager::LoadState::Loaded);
#endif
#ifdef CORRADE_TARGET_APPLE
if(Utility::System::isSandboxed()
#if defined(CORRADE_TARGET_IOS) && defined(CORRADE_TESTSUITE_TARGET_XCTEST)
/** @todo Fix this once I persuade CMake to run XCTest tests properly */
&& std::getenv("SIMULATOR_UDID")
#endif
) {
_testDir = Utility::Path::join(Utility::Path::path(*Utility::Path::executableLocation()), "DistanceFieldGLTestFiles");
} else
#endif
{
_testDir = Utility::Path::join(TEXTURETOOLS_TEST_DIR, "DistanceFieldGLTestFiles");
}
}
void DistanceFieldGLTest::construct() {
DistanceFieldGL distanceField{32};
CORRADE_COMPARE(distanceField.radius(), 32);
}
void DistanceFieldGLTest::constructCopy() {
CORRADE_VERIFY(!std::is_copy_constructible<DistanceFieldGL>{});
CORRADE_VERIFY(!std::is_copy_assignable<DistanceFieldGL>{});
}
void DistanceFieldGLTest::constructMove() {
DistanceFieldGL a{16};
DistanceFieldGL b = Utility::move(a);
CORRADE_COMPARE(b.radius(), 16);
DistanceFieldGL c{8};
c = Utility::move(b);
CORRADE_COMPARE(c.radius(), 16);
CORRADE_VERIFY(std::is_nothrow_move_constructible<DistanceFieldGL>::value);
CORRADE_VERIFY(std::is_nothrow_move_assignable<DistanceFieldGL>::value);
}
void DistanceFieldGLTest::run() {
auto&& data = RunData[testCaseInstanceId()];
setTestCaseDescription(data.name);
Containers::Pointer<Trade::AbstractImporter> importer;
if(!(importer = _manager.loadAndInstantiate("TgaImporter")))
CORRADE_SKIP("TgaImporter plugin not found.");
CORRADE_VERIFY(importer->openFile(Utility::Path::join(_testDir, "input.tga")));
CORRADE_COMPARE(importer->image2DCount(), 1);
Containers::Optional<Trade::ImageData2D> inputImage = importer->image2D(0);
CORRADE_VERIFY(inputImage);
CORRADE_COMPARE(inputImage->format(), PixelFormat::R8Unorm);
/* Flip the input if desired */
if(data.flipX)
Utility::flipInPlace<1>(inputImage->mutablePixels());
if(data.flipY)
Utility::flipInPlace<0>(inputImage->mutablePixels());
#ifndef MAGNUM_TARGET_GLES2
const GL::TextureFormat inputFormat = GL::TextureFormat::R8;
#elif !defined(MAGNUM_TARGET_WEBGL)
GL::TextureFormat inputFormat;
if(GL::Context::current().isExtensionSupported<GL::Extensions::EXT::texture_rg>()) {
CORRADE_INFO("Using" << GL::Extensions::EXT::texture_rg::string());
inputFormat = GL::TextureFormat::R8;
} else {
inputFormat = GL::TextureFormat::Luminance; /** @todo Luminance8 */
}
#else
const GL::TextureFormat inputFormat = GL::TextureFormat::Luminance;
#endif
GL::Texture2D input;
input.setMinificationFilter(GL::SamplerFilter::Nearest, GL::SamplerMipmap::Base)
.setMagnificationFilter(GL::SamplerFilter::Nearest)
.setStorage(1, inputFormat, inputImage->size());
#if !defined(MAGNUM_TARGET_GLES2) || defined(MAGNUM_TARGET_WEBGL)
input.setSubImage(0, {}, *inputImage);
#else
if(GL::Context::current().isExtensionSupported<GL::Extensions::EXT::texture_rg>())
input.setSubImage(0, {}, ImageView2D{inputImage->storage(), GL::PixelFormat::Red, GL::PixelType::UnsignedByte, inputImage->size(), inputImage->data()});
else
input.setSubImage(0, {}, *inputImage);
#endif
#ifndef MAGNUM_TARGET_GLES2
const GL::TextureFormat outputTextureFormat = GL::TextureFormat::R8;
const GL::PixelFormat outputPixelFormat = GL::PixelFormat::Red;
#elif !defined(MAGNUM_TARGET_WEBGL)
GL::TextureFormat outputTextureFormat;
GL::PixelFormat outputPixelFormat;
if(GL::Context::current().isExtensionSupported<GL::Extensions::EXT::texture_rg>()) {
outputTextureFormat = GL::TextureFormat::R8;
outputPixelFormat = GL::PixelFormat::Red;
} else {
outputTextureFormat = GL::TextureFormat::RGBA;
outputPixelFormat = GL::PixelFormat::RGBA;
}
#else
const GL::TextureFormat outputTextureFormat = GL::TextureFormat::RGBA;
const GL::PixelFormat outputPixelFormat = GL::PixelFormat::RGBA;
#endif
const GL::PixelType outputPixelType = GL::PixelType::UnsignedByte;
GL::Texture2D outputTexture;
outputTexture.setMinificationFilter(GL::SamplerFilter::Nearest, GL::SamplerMipmap::Base)
.setMagnificationFilter(GL::SamplerFilter::Nearest)
.setStorage(1, outputTextureFormat, data.size);
/* Fill the texture with some data to verify they don't affect the output
and aren't accidentally overwritten when running on just a
subrectangle */
outputTexture.setSubImage(0, {}, ImageView2D{outputPixelFormat, outputPixelType, data.size,
Containers::Array<char>{DirectInit, std::size_t(data.size.product()*GL::pixelFormatSize(outputPixelFormat, outputPixelType)), '\x66'}});
GL::Framebuffer outputFramebuffer{NoCreate};
if(data.framebuffer) {
/* Deliberately making the viewport the whole framebuffer -- the tool
should adjust it as appropriate and then revert back */
outputFramebuffer = GL::Framebuffer{{{}, data.size}};
outputFramebuffer.attachTexture(GL::Framebuffer::ColorAttachment(0), outputTexture, 0);
}
DistanceFieldGL distanceField{32};
CORRADE_COMPARE(distanceField.radius(), 32);
MAGNUM_VERIFY_NO_GL_ERROR();
if(data.framebuffer) {
distanceField(input, outputFramebuffer, Range2Di::fromSize(data.offset, Vector2i{64})
#ifdef MAGNUM_TARGET_GLES
, inputImage->size()
#endif
);
} else {
distanceField(input, outputTexture, Range2Di::fromSize(data.offset, Vector2i{64})
#ifdef MAGNUM_TARGET_GLES
, inputImage->size()
#endif
);
}
/* The viewport should stay as it was before */
if(data.framebuffer)
CORRADE_COMPARE(outputFramebuffer.viewport(), (Range2Di{{}, data.size}));
Containers::Optional<Image2D> actualOutputImage;
#ifndef MAGNUM_TARGET_GLES2
actualOutputImage = Image2D{PixelFormat::R8Unorm};
#elif !defined(MAGNUM_TARGET_WEBGL)
if(GL::Context::current().isExtensionSupported<GL::Extensions::EXT::texture_rg>())
actualOutputImage = Image2D{GL::PixelFormat::Red, GL::PixelType::UnsignedByte};
else
actualOutputImage = Image2D{PixelFormat::RGBA8Unorm};
#else
actualOutputImage = Image2D{PixelFormat::RGBA8Unorm};
#endif
/* Verify that the other data weren't overwritten if processing just a
subrange -- it should still have the original data kept */
if(data.offset.product()) {
DebugTools::textureSubImage(outputTexture, 0, Range2Di::fromSize({}, Vector2i{1}), *actualOutputImage);
MAGNUM_VERIFY_NO_GL_ERROR();
CORRADE_COMPARE(actualOutputImage->data()[0], '\x66');
}
DebugTools::textureSubImage(outputTexture, 0, Range2Di::fromSize(data.offset, Vector2i{64}), *actualOutputImage);
MAGNUM_VERIFY_NO_GL_ERROR();
if(!(_manager.loadState("AnyImageImporter") & PluginManager::LoadState::Loaded) ||
!(_manager.loadState("TgaImporter") & PluginManager::LoadState::Loaded))
CORRADE_SKIP("AnyImageImporter / TgaImporter plugins not found.");
/* Flip the output back */
Containers::StridedArrayView3D<char> pixels3 = actualOutputImage->pixels();
if(data.flipX)
Utility::flipInPlace<1>(pixels3);
if(data.flipY)
Utility::flipInPlace<0>(pixels3);
/* Use just the first channel if the format is RGBA */
Containers::StridedArrayView2D<UnsignedByte> pixels;
if(actualOutputImage->format() == PixelFormat::RGBA8Unorm)
pixels = Containers::arrayCast<2, Color4ub>(pixels3).slice(&Color4ub::r);
else
pixels = Containers::arrayCast<2, UnsignedByte>(pixels3);
CORRADE_COMPARE_WITH(
pixels,
Utility::Path::join(_testDir, "output.tga"),
/* Some mobile GPUs have slight (off-by-one) rounding errors compared
to the ground truth, but it's just a very small amount of pixels
(20-50 out of the total 4k pixels, iOS/WebGL has slightly more).
That's okay. It's also possible that the ground truth itself has
rounding errors ;) */
(DebugTools::CompareImageToFile{_manager, 1.0f, 0.178f}));
}
void DistanceFieldGLTest::formatNotDrawable() {
CORRADE_SKIP_IF_NO_ASSERT();
#ifndef MAGNUM_TARGET_GLES
if(!GL::Context::current().isExtensionSupported<GL::Extensions::EXT::texture_shared_exponent>())
CORRADE_SKIP(GL::Extensions::EXT::texture_shared_exponent::string() << "not supported, can't test");
#endif
/* Not using GL::textureFormat(PixelFormat::R8Unorm) as that could pass
an unsized format to glTexStorage() on ES2, causing a GL error */
#ifndef MAGNUM_TARGET_GLES2
const GL::TextureFormat inputFormat = GL::TextureFormat::R8;
#elif !defined(MAGNUM_TARGET_WEBGL)
GL::TextureFormat inputFormat;
if(GL::Context::current().isExtensionSupported<GL::Extensions::EXT::texture_rg>()) {
CORRADE_INFO("Using" << GL::Extensions::EXT::texture_rg::string());
inputFormat = GL::TextureFormat::R8;
} else {
inputFormat = GL::TextureFormat::Luminance; /** @todo Luminance8 */
}
#else
const GL::TextureFormat inputFormat = GL::TextureFormat::Luminance;
#endif
GL::Texture2D input;
input.setMinificationFilter(GL::SamplerFilter::Nearest, GL::SamplerMipmap::Base)
.setMagnificationFilter(GL::SamplerFilter::Nearest)
.setStorage(1, inputFormat, {64, 64});
/* Similarly in this case */
GL::Texture2D output;
#ifdef MAGNUM_TARGET_GLES2
output.setImage(0, GL::TextureFormat::Luminance, ImageView2D{GL::PixelFormat::Luminance, GL::PixelType::UnsignedByte, Vector2i{4}});
#else
output.setImage(0, GL::TextureFormat::RGB9E5, ImageView2D{GL::PixelFormat::RGB, GL::PixelType::UnsignedInt5999Rev, Vector2i{4}});
#endif
DistanceFieldGL distanceField{4};
Containers::String out;
Error redirectError{&out};
distanceField(input, output, {{}, Vector2i{4}}
#ifdef MAGNUM_TARGET_GLES
, Vector2i{64}
#endif
);
MAGNUM_VERIFY_NO_GL_ERROR();
#ifndef MAGNUM_TARGET_GLES
/* NV drivers print the same error on both desktop and ES */
if(GL::Context::current().detectedDriver() & GL::Context::DetectedDriver::NVidia)
CORRADE_COMPARE(out, "TextureTools::DistanceFieldGL: output texture format not framebuffer-drawable: GL::Framebuffer::Status::IncompleteAttachment\n");
else
CORRADE_COMPARE(out, "TextureTools::DistanceFieldGL: output texture format not framebuffer-drawable: GL::Framebuffer::Status::Unsupported\n");
#else
CORRADE_COMPARE(out, "TextureTools::DistanceFieldGL: output texture format not framebuffer-drawable: GL::Framebuffer::Status::IncompleteAttachment\n");
#endif
}
void DistanceFieldGLTest::sizeRatioNotMultipleOfTwo() {
CORRADE_SKIP_IF_NO_ASSERT();
/* Not using GL::textureFormat(PixelFormat::R8Unorm) as that could pass
an unsized format to glTexStorage() on ES2, causing a GL error */
#ifndef MAGNUM_TARGET_GLES2
const GL::TextureFormat inputFormat = GL::TextureFormat::R8;
#elif !defined(MAGNUM_TARGET_WEBGL)
GL::TextureFormat inputFormat;
if(GL::Context::current().isExtensionSupported<GL::Extensions::EXT::texture_rg>()) {
CORRADE_INFO("Using" << GL::Extensions::EXT::texture_rg::string());
inputFormat = GL::TextureFormat::R8;
} else {
inputFormat = GL::TextureFormat::Luminance; /** @todo Luminance8 */
}
#else
const GL::TextureFormat inputFormat = GL::TextureFormat::Luminance;
#endif
GL::Texture2D input;
input.setStorage(1, inputFormat, {23*14, 23*14});
/* Similarly in this case */
GL::Texture2D output;
#ifdef MAGNUM_TARGET_GLES2
output.setImage(0, GL::TextureFormat::RGBA, Image2D{GL::PixelFormat::RGBA, GL::PixelType::UnsignedByte, {23, 23}, Containers::Array<char>{NoInit, 23*23*4}});
#else
output.setStorage(1, GL::textureFormat(PixelFormat::RGBA8Unorm), {23, 23});
#endif
DistanceFieldGL distanceField{4};
/* This should be fine */
distanceField(input, output, {{}, Vector2i{23}}
#ifdef MAGNUM_TARGET_GLES
, Vector2i{23*14}
#endif
);
Containers::String out;
Error redirectError{&out};
distanceField(input, output, {{}, Vector2i{23*2}}
#ifdef MAGNUM_TARGET_GLES
, Vector2i{23*14}
#endif
);
/* Verify also just one axis wrong */
distanceField(input, output, {{}, {23*2, 23}}
#ifdef MAGNUM_TARGET_GLES
, Vector2i{23*14}
#endif
);
distanceField(input, output, {{}, {23, 23*2}}
#ifdef MAGNUM_TARGET_GLES
, Vector2i{23*14}
#endif
);
/* Almost correct except that it's not an integer multiply */
distanceField(input, output, {{}, {22, 23}}
#ifdef MAGNUM_TARGET_GLES
, Vector2i{23*14}
#endif
);
distanceField(input, output, {{}, {23, 22}}
#ifdef MAGNUM_TARGET_GLES
, Vector2i{23*14}
#endif
);
MAGNUM_VERIFY_NO_GL_ERROR();
CORRADE_COMPARE(out,
"TextureTools::DistanceFieldGL: expected input and output size ratio to be a multiple of 2, got {322, 322} and {46, 46}\n"
"TextureTools::DistanceFieldGL: expected input and output size ratio to be a multiple of 2, got {322, 322} and {46, 23}\n"
"TextureTools::DistanceFieldGL: expected input and output size ratio to be a multiple of 2, got {322, 322} and {23, 46}\n"
"TextureTools::DistanceFieldGL: expected input and output size ratio to be a multiple of 2, got {322, 322} and {22, 23}\n"
"TextureTools::DistanceFieldGL: expected input and output size ratio to be a multiple of 2, got {322, 322} and {23, 22}\n");
}
#ifndef MAGNUM_TARGET_WEBGL
void DistanceFieldGLTest::benchmark() {
auto&& data = BenchmarkData[testCaseInstanceId()];
setTestCaseDescription(data.name);
#ifdef MAGNUM_TARGET_GLES
if(!GL::Context::current().isExtensionSupported<GL::Extensions::EXT::disjoint_timer_query>())
CORRADE_SKIP(GL::Extensions::EXT::disjoint_timer_query::string() << "is not supported, can't benchmark");
#endif
Containers::Pointer<Trade::AbstractImporter> importer;
if(!(importer = _manager.loadAndInstantiate("TgaImporter")))
CORRADE_SKIP("TgaImporter plugin not found.");
CORRADE_VERIFY(importer->openFile(Utility::Path::join(_testDir, "input.tga")));
CORRADE_COMPARE(importer->image2DCount(), 1);
Containers::Optional<Trade::ImageData2D> inputImage = importer->image2D(0);
CORRADE_VERIFY(inputImage);
CORRADE_COMPARE(inputImage->format(), PixelFormat::R8Unorm);
#ifndef MAGNUM_TARGET_GLES2
const GL::TextureFormat inputFormat = GL::TextureFormat::R8;
#else
GL::TextureFormat inputFormat;
if(GL::Context::current().isExtensionSupported<GL::Extensions::EXT::texture_rg>())
inputFormat = GL::TextureFormat::R8;
else
inputFormat = GL::TextureFormat::Luminance; /** @todo Luminance8 */
#endif
GL::Texture2D input;
input.setMinificationFilter(GL::SamplerFilter::Nearest, GL::SamplerMipmap::Base)
.setMagnificationFilter(GL::SamplerFilter::Nearest)
.setStorage(1, inputFormat, inputImage->size());
#if !defined(MAGNUM_TARGET_GLES2) || defined(MAGNUM_TARGET_WEBGL)
input.setSubImage(0, {}, *inputImage);
#else
if(GL::Context::current().isExtensionSupported<GL::Extensions::EXT::texture_rg>())
input.setSubImage(0, {}, ImageView2D{inputImage->storage(), GL::PixelFormat::Red, GL::PixelType::UnsignedByte, inputImage->size(), inputImage->data()});
else
input.setSubImage(0, {}, *inputImage);
#endif
/* On ES2 the format selection is too annoying, just skip the variants
altogether and pick *some* format in the function itself */
#ifndef MAGNUM_TARGET_GLES2
const GL::TextureFormat outputFormat = data.format;
#else
GL::TextureFormat outputFormat;
if(GL::Context::current().isExtensionSupported<GL::Extensions::EXT::texture_rg>())
outputFormat = GL::TextureFormat::R8;
else
outputFormat = GL::TextureFormat::Luminance; /** @todo Luminance8 */
#endif
GL::Texture2D output;
output.setMinificationFilter(GL::SamplerFilter::Nearest, GL::SamplerMipmap::Base)
.setMagnificationFilter(GL::SamplerFilter::Nearest)
.setStorage(1, outputFormat, Vector2i{64});
GL::Framebuffer framebuffer{{{}, Vector2i{64}}};
framebuffer.attachTexture(GL::Framebuffer::ColorAttachment(0), output, 0);
MAGNUM_VERIFY_NO_GL_ERROR();
DistanceFieldGL distanceField{32};
CORRADE_BENCHMARK(50) {
distanceField(input, framebuffer, {{}, Vector2i{64}}
#ifdef MAGNUM_TARGET_GLES
, inputImage->size()
#endif
);
}
MAGNUM_VERIFY_NO_GL_ERROR();
}
#endif
}}}}
CORRADE_TEST_MAIN(Magnum::TextureTools::Test::DistanceFieldGLTest)