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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "gtest/gtest.h"
#include "mozilla/gfx/2D.h"
#include "Common.h"
#include "Decoder.h"
#include "DecoderFactory.h"
#include "SourceBuffer.h"
#include "SurfaceFilters.h"
#include "SurfacePipe.h"
using namespace mozilla;
using namespace mozilla::gfx;
using namespace mozilla::image;
template <typename Func> void
WithDownscalingFilter(const IntSize& aInputSize,
const IntSize& aOutputSize,
Func aFunc)
{
RefPtr<Decoder> decoder = CreateTrivialDecoder();
ASSERT_TRUE(decoder != nullptr);
WithFilterPipeline(decoder, Forward<Func>(aFunc),
DownscalingConfig { aInputSize,
SurfaceFormat::B8G8R8A8 },
SurfaceConfig { decoder, 0, aOutputSize,
SurfaceFormat::B8G8R8A8, false });
}
void
AssertConfiguringDownscalingFilterFails(const IntSize& aInputSize,
const IntSize& aOutputSize)
{
RefPtr<Decoder> decoder = CreateTrivialDecoder();
ASSERT_TRUE(decoder != nullptr);
AssertConfiguringPipelineFails(decoder,
DownscalingConfig { aInputSize,
SurfaceFormat::B8G8R8A8 },
SurfaceConfig { decoder, 0, aOutputSize,
SurfaceFormat::B8G8R8A8, false });
}
TEST(ImageDownscalingFilter, WritePixels100_100to99_99)
{
WithDownscalingFilter(IntSize(100, 100), IntSize(99, 99),
[](Decoder* aDecoder, SurfaceFilter* aFilter) {
CheckWritePixels(aDecoder, aFilter,
/* aOutputRect = */ Some(IntRect(0, 0, 99, 99)));
});
}
TEST(ImageDownscalingFilter, WritePixels100_100to33_33)
{
WithDownscalingFilter(IntSize(100, 100), IntSize(33, 33),
[](Decoder* aDecoder, SurfaceFilter* aFilter) {
CheckWritePixels(aDecoder, aFilter,
/* aOutputRect = */ Some(IntRect(0, 0, 33, 33)));
});
}
TEST(ImageDownscalingFilter, WritePixels100_100to1_1)
{
WithDownscalingFilter(IntSize(100, 100), IntSize(1, 1),
[](Decoder* aDecoder, SurfaceFilter* aFilter) {
CheckWritePixels(aDecoder, aFilter,
/* aOutputRect = */ Some(IntRect(0, 0, 1, 1)));
});
}
TEST(ImageDownscalingFilter, WritePixels100_100to33_99)
{
WithDownscalingFilter(IntSize(100, 100), IntSize(33, 99),
[](Decoder* aDecoder, SurfaceFilter* aFilter) {
CheckWritePixels(aDecoder, aFilter,
/* aOutputRect = */ Some(IntRect(0, 0, 33, 99)));
});
}
TEST(ImageDownscalingFilter, WritePixels100_100to99_33)
{
WithDownscalingFilter(IntSize(100, 100), IntSize(99, 33),
[](Decoder* aDecoder, SurfaceFilter* aFilter) {
CheckWritePixels(aDecoder, aFilter,
/* aOutputRect = */ Some(IntRect(0, 0, 99, 33)));
});
}
TEST(ImageDownscalingFilter, WritePixels100_100to99_1)
{
WithDownscalingFilter(IntSize(100, 100), IntSize(99, 1),
[](Decoder* aDecoder, SurfaceFilter* aFilter) {
CheckWritePixels(aDecoder, aFilter,
/* aOutputRect = */ Some(IntRect(0, 0, 99, 1)));
});
}
TEST(ImageDownscalingFilter, WritePixels100_100to1_99)
{
WithDownscalingFilter(IntSize(100, 100), IntSize(1, 99),
[](Decoder* aDecoder, SurfaceFilter* aFilter) {
CheckWritePixels(aDecoder, aFilter,
/* aOutputRect = */ Some(IntRect(0, 0, 1, 99)));
});
}
TEST(ImageDownscalingFilter, DownscalingFailsFor100_100to101_101)
{
// Upscaling is disallowed.
AssertConfiguringDownscalingFilterFails(IntSize(100, 100), IntSize(101, 101));
}
TEST(ImageDownscalingFilter, DownscalingFailsFor100_100to100_100)
{
// "Scaling" to the same size is disallowed.
AssertConfiguringDownscalingFilterFails(IntSize(100, 100), IntSize(100, 100));
}
TEST(ImageDownscalingFilter, DownscalingFailsFor0_0toMinus1_Minus1)
{
// A 0x0 input size is disallowed.
AssertConfiguringDownscalingFilterFails(IntSize(0, 0), IntSize(-1, -1));
}
TEST(ImageDownscalingFilter, DownscalingFailsForMinus1_Minus1toMinus2_Minus2)
{
// A negative input size is disallowed.
AssertConfiguringDownscalingFilterFails(IntSize(-1, -1), IntSize(-2, -2));
}
TEST(ImageDownscalingFilter, DownscalingFailsFor100_100to0_0)
{
// A 0x0 output size is disallowed.
AssertConfiguringDownscalingFilterFails(IntSize(100, 100), IntSize(0, 0));
}
TEST(ImageDownscalingFilter, DownscalingFailsFor100_100toMinus1_Minus1)
{
// A negative output size is disallowed.
AssertConfiguringDownscalingFilterFails(IntSize(100, 100), IntSize(-1, -1));
}
TEST(ImageDownscalingFilter, WritePixelsOutput100_100to20_20)
{
WithDownscalingFilter(IntSize(100, 100), IntSize(20, 20),
[](Decoder* aDecoder, SurfaceFilter* aFilter) {
// Fill the image. It consists of 25 lines of green, followed by 25 lines of
// red, followed by 25 lines of green, followed by 25 more lines of red.
uint32_t count = 0;
auto result = aFilter->WritePixels<uint32_t>([&]() -> NextPixel<uint32_t> {
uint32_t color = (count <= 25 * 100) || (count > 50 * 100 && count <= 75 * 100)
? BGRAColor::Green().AsPixel()
: BGRAColor::Red().AsPixel();
++count;
return AsVariant(color);
});
EXPECT_EQ(WriteState::FINISHED, result);
EXPECT_EQ(100u * 100u, count);
AssertCorrectPipelineFinalState(aFilter,
IntRect(0, 0, 100, 100),
IntRect(0, 0, 20, 20));
// Check that the generated image is correct. Note that we skip rows near
// the transitions between colors, since the downscaler does not produce a
// sharp boundary at these points. Even some of the rows we test need a
// small amount of fuzz; this is just the nature of Lanczos downscaling.
RawAccessFrameRef currentFrame = aDecoder->GetCurrentFrameRef();
RefPtr<SourceSurface> surface = currentFrame->GetSourceSurface();
EXPECT_TRUE(RowsAreSolidColor(surface, 0, 4, BGRAColor::Green(), /* aFuzz = */ 2));
EXPECT_TRUE(RowsAreSolidColor(surface, 6, 3, BGRAColor::Red(), /* aFuzz = */ 3));
EXPECT_TRUE(RowsAreSolidColor(surface, 11, 3, BGRAColor::Green(), /* aFuzz = */ 3));
EXPECT_TRUE(RowsAreSolidColor(surface, 16, 4, BGRAColor::Red(), /* aFuzz = */ 3));
});
}
TEST(ImageDownscalingFilter, WritePixelsOutput100_100to10_20)
{
WithDownscalingFilter(IntSize(100, 100), IntSize(10, 20),
[](Decoder* aDecoder, SurfaceFilter* aFilter) {
// Fill the image. It consists of 25 lines of green, followed by 25 lines of
// red, followed by 25 lines of green, followed by 25 more lines of red.
uint32_t count = 0;
auto result = aFilter->WritePixels<uint32_t>([&]() -> NextPixel<uint32_t> {
uint32_t color = (count <= 25 * 100) || (count > 50 * 100 && count <= 75 * 100)
? BGRAColor::Green().AsPixel()
: BGRAColor::Red().AsPixel();
++count;
return AsVariant(color);
});
EXPECT_EQ(WriteState::FINISHED, result);
EXPECT_EQ(100u * 100u, count);
AssertCorrectPipelineFinalState(aFilter,
IntRect(0, 0, 100, 100),
IntRect(0, 0, 10, 20));
// Check that the generated image is correct. Note that we skip rows near
// the transitions between colors, since the downscaler does not produce a
// sharp boundary at these points. Even some of the rows we test need a
// small amount of fuzz; this is just the nature of Lanczos downscaling.
RawAccessFrameRef currentFrame = aDecoder->GetCurrentFrameRef();
RefPtr<SourceSurface> surface = currentFrame->GetSourceSurface();
EXPECT_TRUE(RowsAreSolidColor(surface, 0, 4, BGRAColor::Green(), /* aFuzz = */ 2));
EXPECT_TRUE(RowsAreSolidColor(surface, 6, 3, BGRAColor::Red(), /* aFuzz = */ 3));
EXPECT_TRUE(RowsAreSolidColor(surface, 11, 3, BGRAColor::Green(), /* aFuzz = */ 3));
EXPECT_TRUE(RowsAreSolidColor(surface, 16, 4, BGRAColor::Red(), /* aFuzz = */ 3));
});
}
TEST(ImageDownscalingFilter, ConfiguringPalettedDownscaleFails)
{
RefPtr<Decoder> decoder = CreateTrivialDecoder();
ASSERT_TRUE(decoder != nullptr);
// DownscalingFilter does not support paletted images, so configuration should
// fail.
AssertConfiguringPipelineFails(decoder,
DownscalingConfig { IntSize(100, 100),
SurfaceFormat::B8G8R8A8 },
PalettedSurfaceConfig { decoder, 0, IntSize(20, 20),
IntRect(0, 0, 20, 20),
SurfaceFormat::B8G8R8A8, 8,
false });
}
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