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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<image::Decoder> decoder = CreateTrivialDecoder();
ASSERT_TRUE(decoder != nullptr);
WithFilterPipeline(
decoder, std::forward<Func>(aFunc),
DownscalingConfig{aInputSize, SurfaceFormat::OS_RGBA},
SurfaceConfig{decoder, aOutputSize, SurfaceFormat::OS_RGBA, false});
}
void AssertConfiguringDownscalingFilterFails(const IntSize& aInputSize,
const IntSize& aOutputSize) {
RefPtr<image::Decoder> decoder = CreateTrivialDecoder();
ASSERT_TRUE(decoder != nullptr);
AssertConfiguringPipelineFails(
decoder, DownscalingConfig{aInputSize, SurfaceFormat::OS_RGBA},
SurfaceConfig{decoder, aOutputSize, SurfaceFormat::OS_RGBA, false});
}
TEST(ImageDownscalingFilter, WritePixels100_100to99_99)
{
WithDownscalingFilter(IntSize(100, 100), IntSize(99, 99),
[](image::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),
[](image::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),
[](image::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),
[](image::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),
[](image::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),
[](image::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),
[](image::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),
[](image::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),
[](image::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));
});
}
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