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/*
* Copyright (C) 2012 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
* DAMAGE.
*/
#include "third_party/blink/renderer/platform/graphics/graphics_context.h"
#include <memory>
#include "build/build_config.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/renderer/platform/geometry/path.h"
#include "third_party/blink/renderer/platform/geometry/path_builder.h"
#include "third_party/blink/renderer/platform/graphics/bitmap_image.h"
#include "third_party/blink/renderer/platform/graphics/paint/paint_canvas.h"
#include "third_party/blink/renderer/platform/graphics/paint/paint_controller.h"
#include "third_party/blink/renderer/platform/graphics/paint/paint_record.h"
#include "third_party/blink/renderer/platform/testing/font_test_helpers.h"
#include "third_party/blink/renderer/platform/testing/unit_test_helpers.h"
#include "third_party/blink/renderer/platform/text/text_run.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkShader.h"
namespace blink {
namespace {
#define EXPECT_EQ_RECT(a, b) \
EXPECT_EQ(a.x(), b.x()); \
EXPECT_EQ(a.y(), b.y()); \
EXPECT_EQ(a.width(), b.width()); \
EXPECT_EQ(a.height(), b.height());
#define EXPECT_OPAQUE_PIXELS_IN_RECT(bitmap, opaqueRect) \
{ \
for (int y = opaqueRect.y(); y < opaqueRect.bottom(); ++y) \
for (int x = opaqueRect.x(); x < opaqueRect.right(); ++x) { \
int alpha = *bitmap.getAddr32(x, y) >> 24; \
EXPECT_EQ(255, alpha); \
} \
}
#define EXPECT_OPAQUE_PIXELS_ONLY_IN_RECT(bitmap, opaqueRect) \
{ \
for (int y = 0; y < bitmap.height(); ++y) \
for (int x = 0; x < bitmap.width(); ++x) { \
int alpha = *bitmap.getAddr32(x, y) >> 24; \
bool is_opaque = opaqueRect.Contains(x, y); \
EXPECT_EQ(is_opaque, alpha == 255); \
} \
}
AutoDarkMode AutoDarkModeDisabled() {
return AutoDarkMode(DarkModeFilter::ElementRole::kBackground, false);
}
TEST(GraphicsContextTest, Recording) {
SkBitmap bitmap;
bitmap.allocN32Pixels(100, 100);
bitmap.eraseColor(0);
SkiaPaintCanvas canvas(bitmap);
PaintController paint_controller;
GraphicsContext context(paint_controller);
Color opaque = Color::FromRGBA(255, 0, 0, 255);
context.BeginRecording();
context.FillRect(gfx::RectF(0, 0, 50, 50), opaque, AutoDarkModeDisabled(),
SkBlendMode::kSrcOver);
canvas.drawPicture(context.EndRecording());
EXPECT_OPAQUE_PIXELS_ONLY_IN_RECT(bitmap, gfx::Rect(0, 0, 50, 50))
context.BeginRecording();
context.FillRect(gfx::RectF(0, 0, 100, 100), opaque, AutoDarkModeDisabled(),
SkBlendMode::kSrcOver);
// Make sure the opaque region was unaffected by the rect drawn during
// recording.
EXPECT_OPAQUE_PIXELS_ONLY_IN_RECT(bitmap, gfx::Rect(0, 0, 50, 50))
canvas.drawPicture(context.EndRecording());
EXPECT_OPAQUE_PIXELS_ONLY_IN_RECT(bitmap, gfx::Rect(0, 0, 100, 100))
}
TEST(GraphicsContextTest, UnboundedDrawsAreClipped) {
SkBitmap bitmap;
bitmap.allocN32Pixels(400, 400);
bitmap.eraseColor(0);
SkiaPaintCanvas canvas(bitmap);
Color opaque = Color::FromRGBA(255, 0, 0, 255);
Color transparent = Color::kTransparent;
PaintController paint_controller;
GraphicsContext context(paint_controller);
context.BeginRecording();
context.SetShouldAntialias(false);
// Make the device opaque in 10,10 40x40.
context.FillRect(gfx::RectF(10, 10, 40, 40), opaque, AutoDarkModeDisabled(),
SkBlendMode::kSrcOver);
canvas.drawPicture(context.EndRecording());
EXPECT_OPAQUE_PIXELS_ONLY_IN_RECT(bitmap, gfx::Rect(10, 10, 40, 40));
context.BeginRecording();
// Clip to the left edge of the opaque area.
context.Clip(gfx::Rect(10, 10, 10, 40));
// Draw a path that gets clipped. This should destroy the opaque area, but
// only inside the clip.
const Path path = PathBuilder()
.MoveTo(gfx::PointF(10, 10))
.LineTo(gfx::PointF(40, 40))
.Finalize();
cc::PaintFlags flags;
flags.setColor(transparent.Rgb());
flags.setBlendMode(SkBlendMode::kSrcOut);
context.DrawPath(path.GetSkPath(), flags, AutoDarkModeDisabled());
canvas.drawPicture(context.EndRecording());
EXPECT_OPAQUE_PIXELS_IN_RECT(bitmap, gfx::Rect(20, 10, 30, 40));
}
class GraphicsContextDarkModeTest : public testing::Test {
protected:
void SetUp() override {
bitmap_.allocN32Pixels(4, 1);
bitmap_.eraseColor(0);
canvas_ = std::make_unique<SkiaPaintCanvas>(bitmap_);
}
void DrawColorsToContext(bool is_dark_mode_on,
const DarkModeSettings& settings) {
PaintController paint_controller;
GraphicsContext context(paint_controller);
if (is_dark_mode_on)
context.UpdateDarkModeSettingsForTest(settings);
context.BeginRecording();
context.FillRect(gfx::RectF(0, 0, 1, 1), Color::kBlack,
AutoDarkMode(DarkModeFilter::ElementRole::kBackground,
is_dark_mode_on));
context.FillRect(gfx::RectF(1, 0, 1, 1), Color::kWhite,
AutoDarkMode(DarkModeFilter::ElementRole::kBackground,
is_dark_mode_on));
context.FillRect(gfx::RectF(2, 0, 1, 1), Color::FromSkColor(SK_ColorRED),
AutoDarkMode(DarkModeFilter::ElementRole::kBackground,
is_dark_mode_on));
context.FillRect(gfx::RectF(3, 0, 1, 1), Color::FromSkColor(SK_ColorGRAY),
AutoDarkMode(DarkModeFilter::ElementRole::kBackground,
is_dark_mode_on));
// Capture the result in the bitmap.
canvas_->drawPicture(context.EndRecording());
}
SkBitmap bitmap_;
std::unique_ptr<SkiaPaintCanvas> canvas_;
};
// This is a baseline test where dark mode is turned off. Compare other variants
// of the test where dark mode is enabled.
TEST_F(GraphicsContextDarkModeTest, DarkModeOff) {
DarkModeSettings settings;
DrawColorsToContext(false, settings);
EXPECT_EQ(SK_ColorBLACK, bitmap_.getColor(0, 0));
EXPECT_EQ(SK_ColorWHITE, bitmap_.getColor(1, 0));
EXPECT_EQ(SK_ColorRED, bitmap_.getColor(2, 0));
EXPECT_EQ(SK_ColorGRAY, bitmap_.getColor(3, 0));
}
// Simple invert for testing. Each color component |c|
// is replaced with |255 - c| for easy testing.
TEST_F(GraphicsContextDarkModeTest, SimpleInvertForTesting) {
DarkModeSettings settings;
settings.mode = DarkModeInversionAlgorithm::kSimpleInvertForTesting;
settings.contrast = 0;
DrawColorsToContext(true, settings);
EXPECT_EQ(SK_ColorWHITE, bitmap_.getColor(0, 0));
EXPECT_EQ(SK_ColorBLACK, bitmap_.getColor(1, 0));
EXPECT_EQ(SK_ColorCYAN, bitmap_.getColor(2, 0));
EXPECT_EQ(0xff777777, bitmap_.getColor(3, 0));
}
// Invert brightness (with gamma correction).
TEST_F(GraphicsContextDarkModeTest, InvertBrightness) {
DarkModeSettings settings;
settings.mode = DarkModeInversionAlgorithm::kInvertBrightness;
settings.contrast = 0;
DrawColorsToContext(true, settings);
EXPECT_EQ(SK_ColorWHITE, bitmap_.getColor(0, 0));
EXPECT_EQ(SK_ColorBLACK, bitmap_.getColor(1, 0));
EXPECT_EQ(SK_ColorCYAN, bitmap_.getColor(2, 0));
EXPECT_EQ(0xffe1e1e1, bitmap_.getColor(3, 0));
}
// Invert lightness (in HSL space).
TEST_F(GraphicsContextDarkModeTest, InvertLightness) {
DarkModeSettings settings;
settings.mode = DarkModeInversionAlgorithm::kInvertLightness;
settings.contrast = 0;
DrawColorsToContext(true, settings);
EXPECT_EQ(SK_ColorWHITE, bitmap_.getColor(0, 0));
EXPECT_EQ(SK_ColorBLACK, bitmap_.getColor(1, 0));
EXPECT_EQ(SK_ColorRED, bitmap_.getColor(2, 0));
EXPECT_EQ(0xffe1e1e1, bitmap_.getColor(3, 0));
}
TEST_F(GraphicsContextDarkModeTest, InvertLightnessPlusContrast) {
DarkModeSettings settings;
settings.mode = DarkModeInversionAlgorithm::kInvertLightness;
settings.contrast = 0.2;
DrawColorsToContext(true, settings);
EXPECT_EQ(SK_ColorWHITE, bitmap_.getColor(0, 0));
EXPECT_EQ(SK_ColorBLACK, bitmap_.getColor(1, 0));
EXPECT_EQ(SK_ColorRED, bitmap_.getColor(2, 0));
EXPECT_EQ(0xfff1f1f1, bitmap_.getColor(3, 0));
}
} // namespace
} // namespace blink
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