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flutter / mirrors / engine / c8a91b22ed16dcc55e74441366fb69a2555ad4c6 / . / impeller / aiks / aiks_unittests.cc
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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <array>
#include <cmath>
#include <cstdlib>
#include <iostream>
#include <memory>
#include <tuple>
#include <utility>
#include <vector>
#include "flutter/testing/testing.h"
#include "impeller/aiks/aiks_playground.h"
#include "impeller/aiks/canvas.h"
#include "impeller/aiks/image.h"
#include "impeller/aiks/paint_pass_delegate.h"
#include "impeller/aiks/testing/context_spy.h"
#include "impeller/core/capture.h"
#include "impeller/entity/contents/color_source_contents.h"
#include "impeller/entity/contents/conical_gradient_contents.h"
#include "impeller/entity/contents/filters/inputs/filter_input.h"
#include "impeller/entity/contents/linear_gradient_contents.h"
#include "impeller/entity/contents/scene_contents.h"
#include "impeller/entity/contents/solid_color_contents.h"
#include "impeller/entity/contents/tiled_texture_contents.h"
#include "impeller/geometry/color.h"
#include "impeller/geometry/constants.h"
#include "impeller/geometry/geometry_asserts.h"
#include "impeller/geometry/matrix.h"
#include "impeller/geometry/path_builder.h"
#include "impeller/golden_tests/golden_playground_test.h"
#include "impeller/playground/widgets.h"
#include "impeller/renderer/command_buffer.h"
#include "impeller/renderer/snapshot.h"
#include "impeller/scene/material.h"
#include "impeller/scene/node.h"
#include "impeller/typographer/backends/skia/text_frame_skia.h"
#include "impeller/typographer/backends/skia/typographer_context_skia.h"
#include "impeller/typographer/backends/stb/text_frame_stb.h"
#include "impeller/typographer/backends/stb/typeface_stb.h"
#include "impeller/typographer/backends/stb/typographer_context_stb.h"
#include "third_party/imgui/imgui.h"
#include "third_party/skia/include/core/SkData.h"
namespace impeller {
namespace testing {
#ifdef IMPELLER_GOLDEN_TESTS
using AiksTest = GoldenPlaygroundTest;
#else
using AiksTest = AiksPlayground;
#endif
INSTANTIATE_PLAYGROUND_SUITE(AiksTest);
TEST_P(AiksTest, RotateColorFilteredPath) {
Canvas canvas;
canvas.Concat(Matrix::MakeTranslation({300, 300}));
canvas.Concat(Matrix::MakeRotationZ(Radians(kPiOver2)));
auto arrow_stem =
PathBuilder{}.MoveTo({120, 190}).LineTo({120, 50}).TakePath();
auto arrow_head = PathBuilder{}
.MoveTo({50, 120})
.LineTo({120, 190})
.LineTo({190, 120})
.TakePath();
auto paint = Paint{
.stroke_width = 15.0,
.stroke_cap = Cap::kRound,
.stroke_join = Join::kRound,
.style = Paint::Style::kStroke,
.color_filter =
ColorFilter::MakeBlend(BlendMode::kSourceIn, Color::AliceBlue()),
};
canvas.DrawPath(arrow_stem, paint);
canvas.DrawPath(arrow_head, paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanvasCTMCanBeUpdated) {
Canvas canvas;
Matrix identity;
ASSERT_MATRIX_NEAR(canvas.GetCurrentTransformation(), identity);
canvas.Translate(Size{100, 100});
ASSERT_MATRIX_NEAR(canvas.GetCurrentTransformation(),
Matrix::MakeTranslation({100.0, 100.0, 0.0}));
}
TEST_P(AiksTest, CanvasCanPushPopCTM) {
Canvas canvas;
ASSERT_EQ(canvas.GetSaveCount(), 1u);
ASSERT_EQ(canvas.Restore(), false);
canvas.Translate(Size{100, 100});
canvas.Save();
ASSERT_EQ(canvas.GetSaveCount(), 2u);
ASSERT_MATRIX_NEAR(canvas.GetCurrentTransformation(),
Matrix::MakeTranslation({100.0, 100.0, 0.0}));
ASSERT_TRUE(canvas.Restore());
ASSERT_EQ(canvas.GetSaveCount(), 1u);
ASSERT_MATRIX_NEAR(canvas.GetCurrentTransformation(),
Matrix::MakeTranslation({100.0, 100.0, 0.0}));
}
TEST_P(AiksTest, CanRenderColoredRect) {
Canvas canvas;
Paint paint;
paint.color = Color::Blue();
canvas.DrawPath(PathBuilder{}
.AddRect(Rect::MakeXYWH(100.0, 100.0, 100.0, 100.0))
.TakePath(),
paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderImage) {
Canvas canvas;
Paint paint;
auto image = std::make_shared<Image>(CreateTextureForFixture("kalimba.jpg"));
paint.color = Color::Red();
canvas.DrawImage(image, Point::MakeXY(100.0, 100.0), paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderInvertedImage) {
Canvas canvas;
Paint paint;
auto image = std::make_shared<Image>(CreateTextureForFixture("kalimba.jpg"));
paint.color = Color::Red();
paint.invert_colors = true;
canvas.DrawImage(image, Point::MakeXY(100.0, 100.0), paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
namespace {
bool GenerateMipmap(const std::shared_ptr<Context>& context,
std::shared_ptr<Texture> texture,
std::string label) {
auto buffer = context->CreateCommandBuffer();
if (!buffer) {
return false;
}
auto pass = buffer->CreateBlitPass();
if (!pass) {
return false;
}
pass->GenerateMipmap(std::move(texture), std::move(label));
pass->EncodeCommands(context->GetResourceAllocator());
return buffer->SubmitCommands();
}
void CanRenderTiledTexture(AiksTest* aiks_test,
Entity::TileMode tile_mode,
Matrix local_matrix = {}) {
auto context = aiks_test->GetContext();
ASSERT_TRUE(context);
auto texture = aiks_test->CreateTextureForFixture("table_mountain_nx.png",
/*enable_mipmapping=*/true);
GenerateMipmap(context, texture, "table_mountain_nx");
Canvas canvas;
canvas.Scale(aiks_test->GetContentScale());
canvas.Translate({100.0f, 100.0f, 0});
Paint paint;
paint.color_source =
ColorSource::MakeImage(texture, tile_mode, tile_mode, {}, local_matrix);
paint.color = Color(1, 1, 1, 1);
canvas.DrawRect({0, 0, 600, 600}, paint);
// Should not change the image.
constexpr auto stroke_width = 64;
paint.style = Paint::Style::kStroke;
paint.stroke_width = stroke_width;
if (tile_mode == Entity::TileMode::kDecal) {
canvas.DrawRect({stroke_width, stroke_width, 600, 600}, paint);
} else {
canvas.DrawRect({0, 0, 600, 600}, paint);
}
// Should not change the image.
PathBuilder path_builder;
path_builder.AddCircle({150, 150}, 150);
path_builder.AddRoundedRect(Rect::MakeLTRB(300, 300, 600, 600), 10);
paint.style = Paint::Style::kFill;
canvas.DrawPath(path_builder.TakePath(), paint);
ASSERT_TRUE(aiks_test->OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
} // namespace
TEST_P(AiksTest, CanRenderTiledTextureClamp) {
CanRenderTiledTexture(this, Entity::TileMode::kClamp);
}
TEST_P(AiksTest, CanRenderTiledTextureRepeat) {
CanRenderTiledTexture(this, Entity::TileMode::kRepeat);
}
TEST_P(AiksTest, CanRenderTiledTextureMirror) {
CanRenderTiledTexture(this, Entity::TileMode::kMirror);
}
TEST_P(AiksTest, CanRenderTiledTextureDecal) {
CanRenderTiledTexture(this, Entity::TileMode::kDecal);
}
TEST_P(AiksTest, CanRenderTiledTextureClampWithTranslate) {
CanRenderTiledTexture(this, Entity::TileMode::kClamp,
Matrix::MakeTranslation({172.f, 172.f, 0.f}));
}
TEST_P(AiksTest, CanRenderImageRect) {
Canvas canvas;
Paint paint;
auto image = std::make_shared<Image>(CreateTextureForFixture("kalimba.jpg"));
auto source_rect = Rect::MakeSize(Size(image->GetSize()));
// Render the bottom right quarter of the source image in a stretched rect.
source_rect.size.width /= 2;
source_rect.size.height /= 2;
source_rect.origin.x += source_rect.size.width;
source_rect.origin.y += source_rect.size.height;
canvas.DrawImageRect(image, source_rect, Rect::MakeXYWH(100, 100, 600, 600),
paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderStrokes) {
Canvas canvas;
Paint paint;
paint.color = Color::Red();
paint.stroke_width = 20.0;
paint.style = Paint::Style::kStroke;
canvas.DrawPath(PathBuilder{}.AddLine({200, 100}, {800, 100}).TakePath(),
paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderCurvedStrokes) {
Canvas canvas;
Paint paint;
paint.color = Color::Red();
paint.stroke_width = 25.0;
paint.style = Paint::Style::kStroke;
canvas.DrawPath(PathBuilder{}.AddCircle({500, 500}, 250).TakePath(), paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderClips) {
Canvas canvas;
Paint paint;
paint.color = Color::Fuchsia();
canvas.ClipPath(
PathBuilder{}.AddRect(Rect::MakeXYWH(0, 0, 500, 500)).TakePath());
canvas.DrawPath(PathBuilder{}.AddCircle({500, 500}, 250).TakePath(), paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderNestedClips) {
Canvas canvas;
Paint paint;
paint.color = Color::Fuchsia();
canvas.Save();
canvas.ClipPath(PathBuilder{}.AddCircle({200, 400}, 300).TakePath());
canvas.Restore();
canvas.ClipPath(PathBuilder{}.AddCircle({600, 400}, 300).TakePath());
canvas.ClipPath(PathBuilder{}.AddCircle({400, 600}, 300).TakePath());
canvas.DrawRect(Rect::MakeXYWH(200, 200, 400, 400), paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderDifferenceClips) {
Paint paint;
Canvas canvas;
canvas.Translate({400, 400});
// Limit drawing to face circle with a clip.
canvas.ClipPath(PathBuilder{}.AddCircle(Point(), 200).TakePath());
canvas.Save();
// Cut away eyes/mouth using difference clips.
canvas.ClipPath(PathBuilder{}.AddCircle({-100, -50}, 30).TakePath(),
Entity::ClipOperation::kDifference);
canvas.ClipPath(PathBuilder{}.AddCircle({100, -50}, 30).TakePath(),
Entity::ClipOperation::kDifference);
canvas.ClipPath(PathBuilder{}
.AddQuadraticCurve({-100, 50}, {0, 150}, {100, 50})
.TakePath(),
Entity::ClipOperation::kDifference);
// Draw a huge yellow rectangle to prove the clipping works.
paint.color = Color::Yellow();
canvas.DrawRect(Rect::MakeXYWH(-1000, -1000, 2000, 2000), paint);
// Remove the difference clips and draw hair that partially covers the eyes.
canvas.Restore();
paint.color = Color::Maroon();
canvas.DrawPath(PathBuilder{}
.MoveTo({200, -200})
.HorizontalLineTo(-200)
.VerticalLineTo(-40)
.CubicCurveTo({0, -40}, {0, -80}, {200, -80})
.TakePath(),
paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderWithContiguousClipRestores) {
Canvas canvas;
// Cover the whole canvas with red.
canvas.DrawPaint({.color = Color::Red()});
canvas.Save();
// Append two clips, the second resulting in empty coverage.
canvas.ClipPath(
PathBuilder{}.AddRect(Rect::MakeXYWH(100, 100, 100, 100)).TakePath());
canvas.ClipPath(
PathBuilder{}.AddRect(Rect::MakeXYWH(300, 300, 100, 100)).TakePath());
// Restore to no clips.
canvas.Restore();
// Replace the whole canvas with green.
canvas.DrawPaint({.color = Color::Green()});
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, ClipsUseCurrentTransform) {
std::array<Color, 5> colors = {Color::White(), Color::Black(),
Color::SkyBlue(), Color::Red(),
Color::Yellow()};
Canvas canvas;
Paint paint;
canvas.Translate(Vector3(300, 300));
for (int i = 0; i < 15; i++) {
canvas.Scale(Vector3(0.8, 0.8));
paint.color = colors[i % colors.size()];
canvas.ClipPath(PathBuilder{}.AddCircle({0, 0}, 300).TakePath());
canvas.DrawRect(Rect(-300, -300, 600, 600), paint);
}
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanSaveLayerStandalone) {
Canvas canvas;
Paint red;
red.color = Color::Red();
Paint alpha;
alpha.color = Color::Red().WithAlpha(0.5);
canvas.SaveLayer(alpha);
canvas.DrawCircle({125, 125}, 125, red);
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
namespace {
void CanRenderLinearGradient(AiksTest* aiks_test, Entity::TileMode tile_mode) {
Canvas canvas;
canvas.Scale(aiks_test->GetContentScale());
Paint paint;
canvas.Translate({100.0f, 0, 0});
std::vector<Color> colors = {Color{0.9568, 0.2627, 0.2118, 1.0},
Color{0.1294, 0.5882, 0.9529, 0.0}};
std::vector<Scalar> stops = {0.0, 1.0};
paint.color_source = ColorSource::MakeLinearGradient(
{0, 0}, {200, 200}, std::move(colors), std::move(stops), tile_mode, {});
paint.color = Color(1.0, 1.0, 1.0, 1.0);
canvas.DrawRect({0, 0, 600, 600}, paint);
ASSERT_TRUE(aiks_test->OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
} // namespace
TEST_P(AiksTest, CanRenderLinearGradientClamp) {
CanRenderLinearGradient(this, Entity::TileMode::kClamp);
}
TEST_P(AiksTest, CanRenderLinearGradientRepeat) {
CanRenderLinearGradient(this, Entity::TileMode::kRepeat);
}
TEST_P(AiksTest, CanRenderLinearGradientMirror) {
CanRenderLinearGradient(this, Entity::TileMode::kMirror);
}
TEST_P(AiksTest, CanRenderLinearGradientDecal) {
CanRenderLinearGradient(this, Entity::TileMode::kDecal);
}
TEST_P(AiksTest, CanRenderLinearGradientDecalWithColorFilter) {
Canvas canvas;
canvas.Scale(GetContentScale());
Paint paint;
canvas.Translate({100.0f, 0, 0});
std::vector<Color> colors = {Color{0.9568, 0.2627, 0.2118, 1.0},
Color{0.1294, 0.5882, 0.9529, 0.0}};
std::vector<Scalar> stops = {0.0, 1.0};
paint.color_source = ColorSource::MakeLinearGradient(
{0, 0}, {200, 200}, std::move(colors), std::move(stops),
Entity::TileMode::kDecal, {});
// Overlay the gradient with 25% green. This should appear as the entire
// rectangle being drawn with 25% green, including the border area outside the
// decal gradient.
paint.color_filter = ColorFilter::MakeBlend(BlendMode::kSourceOver,
Color::Green().WithAlpha(0.25));
paint.color = Color(1.0, 1.0, 1.0, 1.0);
canvas.DrawRect({0, 0, 600, 600}, paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
static void CanRenderLinearGradientWithDithering(AiksTest* aiks_test,
bool use_dithering) {
Canvas canvas;
Paint paint;
canvas.Translate({100.0, 100.0, 0});
// 0xffcccccc --> 0xff333333, taken from
// https://github.com/flutter/flutter/issues/118073#issue-1521699748
std::vector<Color> colors = {Color{0.8, 0.8, 0.8, 1.0},
Color{0.2, 0.2, 0.2, 1.0}};
std::vector<Scalar> stops = {0.0, 1.0};
paint.color_source = ColorSource::MakeLinearGradient(
{0, 0}, {800, 500}, std::move(colors), std::move(stops),
Entity::TileMode::kClamp, {});
paint.dither = use_dithering;
canvas.DrawRect({0, 0, 800, 500}, paint);
ASSERT_TRUE(aiks_test->OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderLinearGradientWithDitheringDisabled) {
CanRenderLinearGradientWithDithering(this, false);
}
TEST_P(AiksTest, CanRenderLinearGradientWithDitheringEnabled) {
CanRenderLinearGradientWithDithering(this, true);
} // namespace
static void CanRenderRadialGradientWithDithering(AiksTest* aiks_test,
bool use_dithering) {
Canvas canvas;
Paint paint;
canvas.Translate({100.0, 100.0, 0});
// #FFF -> #000
std::vector<Color> colors = {Color{1.0, 1.0, 1.0, 1.0},
Color{0.0, 0.0, 0.0, 1.0}};
std::vector<Scalar> stops = {0.0, 1.0};
paint.color_source = ColorSource::MakeRadialGradient(
{600, 600}, 600, std::move(colors), std::move(stops),
Entity::TileMode::kClamp, {});
paint.dither = use_dithering;
canvas.DrawRect({0, 0, 1200, 1200}, paint);
ASSERT_TRUE(aiks_test->OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderRadialGradientWithDitheringDisabled) {
CanRenderRadialGradientWithDithering(this, false);
}
TEST_P(AiksTest, CanRenderRadialGradientWithDitheringEnabled) {
CanRenderRadialGradientWithDithering(this, true);
}
static void CanRenderSweepGradientWithDithering(AiksTest* aiks_test,
bool use_dithering) {
Canvas canvas;
canvas.Scale(aiks_test->GetContentScale());
Paint paint;
canvas.Translate({100.0, 100.0, 0});
// #FFF -> #000
std::vector<Color> colors = {Color{1.0, 1.0, 1.0, 1.0},
Color{0.0, 0.0, 0.0, 1.0}};
std::vector<Scalar> stops = {0.0, 1.0};
paint.color_source = ColorSource::MakeSweepGradient(
{100, 100}, Degrees(45), Degrees(135), std::move(colors),
std::move(stops), Entity::TileMode::kMirror, {});
paint.dither = use_dithering;
canvas.DrawRect({0, 0, 600, 600}, paint);
ASSERT_TRUE(aiks_test->OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderSweepGradientWithDitheringDisabled) {
CanRenderSweepGradientWithDithering(this, false);
}
TEST_P(AiksTest, CanRenderSweepGradientWithDitheringEnabled) {
CanRenderSweepGradientWithDithering(this, true);
}
static void CanRenderConicalGradientWithDithering(AiksTest* aiks_test,
bool use_dithering) {
Canvas canvas;
canvas.Scale(aiks_test->GetContentScale());
Paint paint;
canvas.Translate({100.0, 100.0, 0});
// #FFF -> #000
std::vector<Color> colors = {Color{1.0, 1.0, 1.0, 1.0},
Color{0.0, 0.0, 0.0, 1.0}};
std::vector<Scalar> stops = {0.0, 1.0};
paint.color_source = ColorSource::MakeConicalGradient(
{100, 100}, 100, std::move(colors), std::move(stops), {0, 1}, 0,
Entity::TileMode::kMirror, {});
paint.dither = use_dithering;
canvas.DrawRect({0, 0, 600, 600}, paint);
ASSERT_TRUE(aiks_test->OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderConicalGradientWithDitheringDisabled) {
CanRenderConicalGradientWithDithering(this, false);
}
TEST_P(AiksTest, CanRenderConicalGradientWithDitheringEnabled) {
CanRenderConicalGradientWithDithering(this, true);
}
namespace {
void CanRenderLinearGradientWithOverlappingStops(AiksTest* aiks_test,
Entity::TileMode tile_mode) {
Canvas canvas;
Paint paint;
canvas.Translate({100.0, 100.0, 0});
std::vector<Color> colors = {
Color{0.9568, 0.2627, 0.2118, 1.0}, Color{0.9568, 0.2627, 0.2118, 1.0},
Color{0.1294, 0.5882, 0.9529, 1.0}, Color{0.1294, 0.5882, 0.9529, 1.0}};
std::vector<Scalar> stops = {0.0, 0.5, 0.5, 1.0};
paint.color_source = ColorSource::MakeLinearGradient(
{0, 0}, {500, 500}, std::move(colors), std::move(stops), tile_mode, {});
paint.color = Color(1.0, 1.0, 1.0, 1.0);
canvas.DrawRect({0, 0, 500, 500}, paint);
ASSERT_TRUE(aiks_test->OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
} // namespace
// Only clamp is necessary. All tile modes are the same output.
TEST_P(AiksTest, CanRenderLinearGradientWithOverlappingStopsClamp) {
CanRenderLinearGradientWithOverlappingStops(this, Entity::TileMode::kClamp);
}
namespace {
void CanRenderLinearGradientManyColors(AiksTest* aiks_test,
Entity::TileMode tile_mode) {
Canvas canvas;
canvas.Scale(aiks_test->GetContentScale());
Paint paint;
canvas.Translate({100, 100, 0});
std::vector<Color> colors = {
Color{0x1f / 255.0, 0.0, 0x5c / 255.0, 1.0},
Color{0x5b / 255.0, 0.0, 0x60 / 255.0, 1.0},
Color{0x87 / 255.0, 0x01 / 255.0, 0x60 / 255.0, 1.0},
Color{0xac / 255.0, 0x25 / 255.0, 0x53 / 255.0, 1.0},
Color{0xe1 / 255.0, 0x6b / 255.0, 0x5c / 255.0, 1.0},
Color{0xf3 / 255.0, 0x90 / 255.0, 0x60 / 255.0, 1.0},
Color{0xff / 255.0, 0xb5 / 255.0, 0x6b / 250.0, 1.0}};
std::vector<Scalar> stops = {
0.0,
(1.0 / 6.0) * 1,
(1.0 / 6.0) * 2,
(1.0 / 6.0) * 3,
(1.0 / 6.0) * 4,
(1.0 / 6.0) * 5,
1.0,
};
paint.color_source = ColorSource::MakeLinearGradient(
{0, 0}, {200, 200}, std::move(colors), std::move(stops), tile_mode, {});
paint.color = Color(1.0, 1.0, 1.0, 1.0);
canvas.DrawRect({0, 0, 600, 600}, paint);
canvas.Restore();
ASSERT_TRUE(aiks_test->OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
} // namespace
TEST_P(AiksTest, CanRenderLinearGradientManyColorsClamp) {
CanRenderLinearGradientManyColors(this, Entity::TileMode::kClamp);
}
TEST_P(AiksTest, CanRenderLinearGradientManyColorsRepeat) {
CanRenderLinearGradientManyColors(this, Entity::TileMode::kRepeat);
}
TEST_P(AiksTest, CanRenderLinearGradientManyColorsMirror) {
CanRenderLinearGradientManyColors(this, Entity::TileMode::kMirror);
}
TEST_P(AiksTest, CanRenderLinearGradientManyColorsDecal) {
CanRenderLinearGradientManyColors(this, Entity::TileMode::kDecal);
}
namespace {
void CanRenderLinearGradientWayManyColors(AiksTest* aiks_test,
Entity::TileMode tile_mode) {
Canvas canvas;
Paint paint;
canvas.Translate({100.0, 100.0, 0});
auto color = Color{0x1f / 255.0, 0.0, 0x5c / 255.0, 1.0};
std::vector<Color> colors;
std::vector<Scalar> stops;
auto current_stop = 0.0;
for (int i = 0; i < 2000; i++) {
colors.push_back(color);
stops.push_back(current_stop);
current_stop += 1 / 2000.0;
}
stops[2000 - 1] = 1.0;
paint.color_source = ColorSource::MakeLinearGradient(
{0, 0}, {200, 200}, std::move(colors), std::move(stops), tile_mode, {});
canvas.DrawRect({0, 0, 600, 600}, paint);
ASSERT_TRUE(aiks_test->OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
} // namespace
// Only test clamp on purpose since they all look the same.
TEST_P(AiksTest, CanRenderLinearGradientWayManyColorsClamp) {
CanRenderLinearGradientWayManyColors(this, Entity::TileMode::kClamp);
}
TEST_P(AiksTest, CanRenderLinearGradientManyColorsUnevenStops) {
auto callback = [&](AiksContext& renderer) -> std::optional<Picture> {
const char* tile_mode_names[] = {"Clamp", "Repeat", "Mirror", "Decal"};
const Entity::TileMode tile_modes[] = {
Entity::TileMode::kClamp, Entity::TileMode::kRepeat,
Entity::TileMode::kMirror, Entity::TileMode::kDecal};
static int selected_tile_mode = 0;
ImGui::Begin("Controls", nullptr, ImGuiWindowFlags_AlwaysAutoResize);
ImGui::Combo("Tile mode", &selected_tile_mode, tile_mode_names,
sizeof(tile_mode_names) / sizeof(char*));
static Matrix matrix = {
1, 0, 0, 0, //
0, 1, 0, 0, //
0, 0, 1, 0, //
0, 0, 0, 1 //
};
std::string label = "##1";
for (int i = 0; i < 4; i++) {
ImGui::InputScalarN(label.c_str(), ImGuiDataType_Float, &(matrix.vec[i]),
4, NULL, NULL, "%.2f", 0);
label[2]++;
}
ImGui::End();
Canvas canvas;
Paint paint;
canvas.Translate({100.0, 100.0, 0});
auto tile_mode = tile_modes[selected_tile_mode];
std::vector<Color> colors = {
Color{0x1f / 255.0, 0.0, 0x5c / 255.0, 1.0},
Color{0x5b / 255.0, 0.0, 0x60 / 255.0, 1.0},
Color{0x87 / 255.0, 0x01 / 255.0, 0x60 / 255.0, 1.0},
Color{0xac / 255.0, 0x25 / 255.0, 0x53 / 255.0, 1.0},
Color{0xe1 / 255.0, 0x6b / 255.0, 0x5c / 255.0, 1.0},
Color{0xf3 / 255.0, 0x90 / 255.0, 0x60 / 255.0, 1.0},
Color{0xff / 255.0, 0xb5 / 255.0, 0x6b / 250.0, 1.0}};
std::vector<Scalar> stops = {
0.0, 2.0 / 62.0, 4.0 / 62.0, 8.0 / 62.0, 16.0 / 62.0, 32.0 / 62.0, 1.0,
};
paint.color_source = ColorSource::MakeLinearGradient(
{0, 0}, {200, 200}, std::move(colors), std::move(stops), tile_mode, {});
canvas.DrawRect({0, 0, 600, 600}, paint);
return canvas.EndRecordingAsPicture();
};
ASSERT_TRUE(OpenPlaygroundHere(callback));
}
TEST_P(AiksTest, CanRenderLinearGradientMaskBlur) {
Canvas canvas;
Paint paint = {
.color = Color::White(),
.color_source = ColorSource::MakeLinearGradient(
{200, 200}, {400, 400},
{Color::Red(), Color::White(), Color::Red(), Color::White(),
Color::Red(), Color::White(), Color::Red(), Color::White(),
Color::Red(), Color::White(), Color::Red()},
{0.0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1.0},
Entity::TileMode::kClamp, {}),
.mask_blur_descriptor =
Paint::MaskBlurDescriptor{
.style = FilterContents::BlurStyle::kNormal,
.sigma = Sigma(20),
},
};
canvas.DrawCircle({300, 300}, 200, paint);
canvas.DrawRect(Rect::MakeLTRB(100, 300, 500, 600), paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderRadialGradient) {
auto callback = [&](AiksContext& renderer) -> std::optional<Picture> {
const char* tile_mode_names[] = {"Clamp", "Repeat", "Mirror", "Decal"};
const Entity::TileMode tile_modes[] = {
Entity::TileMode::kClamp, Entity::TileMode::kRepeat,
Entity::TileMode::kMirror, Entity::TileMode::kDecal};
static int selected_tile_mode = 0;
ImGui::Begin("Controls", nullptr, ImGuiWindowFlags_AlwaysAutoResize);
ImGui::Combo("Tile mode", &selected_tile_mode, tile_mode_names,
sizeof(tile_mode_names) / sizeof(char*));
static Matrix matrix = {
1, 0, 0, 0, //
0, 1, 0, 0, //
0, 0, 1, 0, //
0, 0, 0, 1 //
};
std::string label = "##1";
for (int i = 0; i < 4; i++) {
ImGui::InputScalarN(label.c_str(), ImGuiDataType_Float, &(matrix.vec[i]),
4, NULL, NULL, "%.2f", 0);
label[2]++;
}
ImGui::End();
Canvas canvas;
Paint paint;
canvas.Translate({100.0, 100.0, 0});
auto tile_mode = tile_modes[selected_tile_mode];
std::vector<Color> colors = {Color{0.9568, 0.2627, 0.2118, 1.0},
Color{0.1294, 0.5882, 0.9529, 1.0}};
std::vector<Scalar> stops = {0.0, 1.0};
paint.color_source = ColorSource::MakeRadialGradient(
{100, 100}, 100, std::move(colors), std::move(stops), tile_mode, {});
canvas.DrawRect({0, 0, 600, 600}, paint);
return canvas.EndRecordingAsPicture();
};
ASSERT_TRUE(OpenPlaygroundHere(callback));
}
TEST_P(AiksTest, CanRenderRadialGradientManyColors) {
auto callback = [&](AiksContext& renderer) -> std::optional<Picture> {
const char* tile_mode_names[] = {"Clamp", "Repeat", "Mirror", "Decal"};
const Entity::TileMode tile_modes[] = {
Entity::TileMode::kClamp, Entity::TileMode::kRepeat,
Entity::TileMode::kMirror, Entity::TileMode::kDecal};
static int selected_tile_mode = 0;
ImGui::Begin("Controls", nullptr, ImGuiWindowFlags_AlwaysAutoResize);
ImGui::Combo("Tile mode", &selected_tile_mode, tile_mode_names,
sizeof(tile_mode_names) / sizeof(char*));
static Matrix matrix = {
1, 0, 0, 0, //
0, 1, 0, 0, //
0, 0, 1, 0, //
0, 0, 0, 1 //
};
std::string label = "##1";
for (int i = 0; i < 4; i++) {
ImGui::InputScalarN(label.c_str(), ImGuiDataType_Float, &(matrix.vec[i]),
4, NULL, NULL, "%.2f", 0);
label[2]++;
}
ImGui::End();
Canvas canvas;
Paint paint;
canvas.Translate({100.0, 100.0, 0});
auto tile_mode = tile_modes[selected_tile_mode];
std::vector<Color> colors = {
Color{0x1f / 255.0, 0.0, 0x5c / 255.0, 1.0},
Color{0x5b / 255.0, 0.0, 0x60 / 255.0, 1.0},
Color{0x87 / 255.0, 0x01 / 255.0, 0x60 / 255.0, 1.0},
Color{0xac / 255.0, 0x25 / 255.0, 0x53 / 255.0, 1.0},
Color{0xe1 / 255.0, 0x6b / 255.0, 0x5c / 255.0, 1.0},
Color{0xf3 / 255.0, 0x90 / 255.0, 0x60 / 255.0, 1.0},
Color{0xff / 255.0, 0xb5 / 255.0, 0x6b / 250.0, 1.0}};
std::vector<Scalar> stops = {
0.0,
(1.0 / 6.0) * 1,
(1.0 / 6.0) * 2,
(1.0 / 6.0) * 3,
(1.0 / 6.0) * 4,
(1.0 / 6.0) * 5,
1.0,
};
paint.color_source = ColorSource::MakeRadialGradient(
{100, 100}, 100, std::move(colors), std::move(stops), tile_mode, {});
canvas.DrawRect({0, 0, 600, 600}, paint);
return canvas.EndRecordingAsPicture();
};
ASSERT_TRUE(OpenPlaygroundHere(callback));
}
namespace {
void CanRenderSweepGradient(AiksTest* aiks_test, Entity::TileMode tile_mode) {
Canvas canvas;
canvas.Scale(aiks_test->GetContentScale());
Paint paint;
canvas.Translate({100, 100, 0});
std::vector<Color> colors = {Color{0.9568, 0.2627, 0.2118, 1.0},
Color{0.1294, 0.5882, 0.9529, 1.0}};
std::vector<Scalar> stops = {0.0, 1.0};
paint.color_source = ColorSource::MakeSweepGradient(
{100, 100}, Degrees(45), Degrees(135), std::move(colors),
std::move(stops), tile_mode, {});
canvas.DrawRect({0, 0, 600, 600}, paint);
ASSERT_TRUE(aiks_test->OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
} // namespace
TEST_P(AiksTest, CanRenderSweepGradientClamp) {
CanRenderSweepGradient(this, Entity::TileMode::kClamp);
}
TEST_P(AiksTest, CanRenderSweepGradientRepeat) {
CanRenderSweepGradient(this, Entity::TileMode::kRepeat);
}
TEST_P(AiksTest, CanRenderSweepGradientMirror) {
CanRenderSweepGradient(this, Entity::TileMode::kMirror);
}
TEST_P(AiksTest, CanRenderSweepGradientDecal) {
CanRenderSweepGradient(this, Entity::TileMode::kDecal);
}
namespace {
void CanRenderSweepGradientManyColors(AiksTest* aiks_test,
Entity::TileMode tile_mode) {
Canvas canvas;
Paint paint;
canvas.Translate({100.0, 100.0, 0});
std::vector<Color> colors = {
Color{0x1f / 255.0, 0.0, 0x5c / 255.0, 1.0},
Color{0x5b / 255.0, 0.0, 0x60 / 255.0, 1.0},
Color{0x87 / 255.0, 0x01 / 255.0, 0x60 / 255.0, 1.0},
Color{0xac / 255.0, 0x25 / 255.0, 0x53 / 255.0, 1.0},
Color{0xe1 / 255.0, 0x6b / 255.0, 0x5c / 255.0, 1.0},
Color{0xf3 / 255.0, 0x90 / 255.0, 0x60 / 255.0, 1.0},
Color{0xff / 255.0, 0xb5 / 255.0, 0x6b / 250.0, 1.0}};
std::vector<Scalar> stops = {
0.0,
(1.0 / 6.0) * 1,
(1.0 / 6.0) * 2,
(1.0 / 6.0) * 3,
(1.0 / 6.0) * 4,
(1.0 / 6.0) * 5,
1.0,
};
paint.color_source = ColorSource::MakeSweepGradient(
{100, 100}, Degrees(45), Degrees(135), std::move(colors),
std::move(stops), tile_mode, {});
canvas.DrawRect({0, 0, 600, 600}, paint);
ASSERT_TRUE(aiks_test->OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
} // namespace
TEST_P(AiksTest, CanRenderSweepGradientManyColorsClamp) {
CanRenderSweepGradientManyColors(this, Entity::TileMode::kClamp);
}
TEST_P(AiksTest, CanRenderSweepGradientManyColorsRepeat) {
CanRenderSweepGradientManyColors(this, Entity::TileMode::kRepeat);
}
TEST_P(AiksTest, CanRenderSweepGradientManyColorsMirror) {
CanRenderSweepGradientManyColors(this, Entity::TileMode::kMirror);
}
TEST_P(AiksTest, CanRenderSweepGradientManyColorsDecal) {
CanRenderSweepGradientManyColors(this, Entity::TileMode::kDecal);
}
TEST_P(AiksTest, CanRenderConicalGradient) {
Scalar size = 256;
Canvas canvas;
Paint paint;
paint.color = Color::White();
canvas.DrawRect({0, 0, size * 3, size * 3}, paint);
std::vector<Color> colors = {Color::MakeRGBA8(0xF4, 0x43, 0x36, 0xFF),
Color::MakeRGBA8(0xFF, 0xEB, 0x3B, 0xFF),
Color::MakeRGBA8(0x4c, 0xAF, 0x50, 0xFF),
Color::MakeRGBA8(0x21, 0x96, 0xF3, 0xFF)};
std::vector<Scalar> stops = {0.0, 1.f / 3.f, 2.f / 3.f, 1.0};
std::array<std::tuple<Point, float, Point, float>, 8> array{
std::make_tuple(Point{size / 2.f, size / 2.f}, 0.f,
Point{size / 2.f, size / 2.f}, size / 2.f),
std::make_tuple(Point{size / 2.f, size / 2.f}, size / 4.f,
Point{size / 2.f, size / 2.f}, size / 2.f),
std::make_tuple(Point{size / 4.f, size / 4.f}, 0.f,
Point{size / 2.f, size / 2.f}, size / 2.f),
std::make_tuple(Point{size / 4.f, size / 4.f}, size / 2.f,
Point{size / 2.f, size / 2.f}, 0),
std::make_tuple(Point{size / 4.f, size / 4.f}, size / 4.f,
Point{size / 2.f, size / 2.f}, size / 2.f),
std::make_tuple(Point{size / 4.f, size / 4.f}, size / 16.f,
Point{size / 2.f, size / 2.f}, size / 8.f),
std::make_tuple(Point{size / 4.f, size / 4.f}, size / 8.f,
Point{size / 2.f, size / 2.f}, size / 16.f),
std::make_tuple(Point{size / 8.f, size / 8.f}, size / 8.f,
Point{size / 2.f, size / 2.f}, size / 8.f),
};
for (int i = 0; i < 8; i++) {
canvas.Save();
canvas.Translate({(i % 3) * size, i / 3 * size, 0});
paint.color_source = ColorSource::MakeConicalGradient(
std::get<0>(array[i]), std::get<1>(array[i]), colors, stops,
std::get<2>(array[i]), std::get<3>(array[i]), Entity::TileMode::kClamp,
{});
canvas.DrawRect({0, 0, size, size}, paint);
canvas.Restore();
}
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderGradientDecalWithBackground) {
std::vector<Color> colors = {Color::MakeRGBA8(0xF4, 0x43, 0x36, 0xFF),
Color::MakeRGBA8(0xFF, 0xEB, 0x3B, 0xFF),
Color::MakeRGBA8(0x4c, 0xAF, 0x50, 0xFF),
Color::MakeRGBA8(0x21, 0x96, 0xF3, 0xFF)};
std::vector<Scalar> stops = {0.0, 1.f / 3.f, 2.f / 3.f, 1.0};
std::array<ColorSource, 3> color_sources = {
ColorSource::MakeLinearGradient({0, 0}, {100, 100}, colors, stops,
Entity::TileMode::kDecal, {}),
ColorSource::MakeRadialGradient({100, 100}, 100, colors, stops,
Entity::TileMode::kDecal, {}),
ColorSource::MakeSweepGradient({100, 100}, Degrees(45), Degrees(135),
colors, stops, Entity::TileMode::kDecal,
{}),
};
Canvas canvas;
Paint paint;
paint.color = Color::White();
canvas.DrawRect(Rect::MakeLTRB(0, 0, 605, 205), paint);
for (int i = 0; i < 3; i++) {
canvas.Save();
canvas.Translate({i * 200.0f, 0, 0});
paint.color_source = color_sources[i];
canvas.DrawRect(Rect::MakeLTRB(0, 0, 200, 200), paint);
canvas.Restore();
}
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderDifferentShapesWithSameColorSource) {
Canvas canvas;
Paint paint;
std::vector<Color> colors = {Color{0.9568, 0.2627, 0.2118, 1.0},
Color{0.1294, 0.5882, 0.9529, 1.0}};
std::vector<Scalar> stops = {
0.0,
1.0,
};
paint.color_source = ColorSource::MakeLinearGradient(
{0, 0}, {100, 100}, std::move(colors), std::move(stops),
Entity::TileMode::kRepeat, {});
canvas.Save();
canvas.Translate({100, 100, 0});
canvas.DrawRect({0, 0, 200, 200}, paint);
canvas.Restore();
canvas.Save();
canvas.Translate({100, 400, 0});
canvas.DrawCircle({100, 100}, 100, paint);
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanPictureConvertToImage) {
Canvas recorder_canvas;
Paint paint;
paint.color = Color{0.9568, 0.2627, 0.2118, 1.0};
recorder_canvas.DrawRect({100.0, 100.0, 600, 600}, paint);
paint.color = Color{0.1294, 0.5882, 0.9529, 1.0};
recorder_canvas.DrawRect({200.0, 200.0, 600, 600}, paint);
Canvas canvas;
AiksContext renderer(GetContext(), nullptr);
paint.color = Color::BlackTransparent();
canvas.DrawPaint(paint);
Picture picture = recorder_canvas.EndRecordingAsPicture();
auto image = picture.ToImage(renderer, ISize{1000, 1000});
if (image) {
canvas.DrawImage(image, Point(), Paint());
paint.color = Color{0.1, 0.1, 0.1, 0.2};
canvas.DrawRect(Rect::MakeSize(ISize{1000, 1000}), paint);
}
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, BlendModeShouldCoverWholeScreen) {
Canvas canvas;
Paint paint;
paint.color = Color::Red();
canvas.DrawPaint(paint);
paint.blend_mode = BlendMode::kSourceOver;
canvas.SaveLayer(paint);
paint.color = Color::White();
canvas.DrawRect({100, 100, 400, 400}, paint);
paint.blend_mode = BlendMode::kSource;
canvas.SaveLayer(paint);
paint.color = Color::Blue();
canvas.DrawRect({200, 200, 200, 200}, paint);
canvas.Restore();
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderGroupOpacity) {
Canvas canvas;
Paint red;
red.color = Color::Red();
Paint green;
green.color = Color::Green().WithAlpha(0.5);
Paint blue;
blue.color = Color::Blue();
Paint alpha;
alpha.color = Color::Red().WithAlpha(0.5);
canvas.SaveLayer(alpha);
canvas.DrawRect({000, 000, 100, 100}, red);
canvas.DrawRect({020, 020, 100, 100}, green);
canvas.DrawRect({040, 040, 100, 100}, blue);
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CoordinateConversionsAreCorrect) {
Canvas canvas;
// Render a texture directly.
{
Paint paint;
auto image =
std::make_shared<Image>(CreateTextureForFixture("kalimba.jpg"));
paint.color = Color::Red();
canvas.Save();
canvas.Translate({100, 200, 0});
canvas.Scale(Vector2{0.5, 0.5});
canvas.DrawImage(image, Point::MakeXY(100.0, 100.0), paint);
canvas.Restore();
}
// Render an offscreen rendered texture.
{
Paint red;
red.color = Color::Red();
Paint green;
green.color = Color::Green();
Paint blue;
blue.color = Color::Blue();
Paint alpha;
alpha.color = Color::Red().WithAlpha(0.5);
canvas.SaveLayer(alpha);
canvas.DrawRect({000, 000, 100, 100}, red);
canvas.DrawRect({020, 020, 100, 100}, green);
canvas.DrawRect({040, 040, 100, 100}, blue);
canvas.Restore();
}
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanPerformFullScreenMSAA) {
Canvas canvas;
Paint red;
red.color = Color::Red();
canvas.DrawCircle({250, 250}, 125, red);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanPerformSkew) {
Canvas canvas;
Paint red;
red.color = Color::Red();
canvas.Skew(2, 5);
canvas.DrawRect(Rect::MakeXYWH(0, 0, 100, 100), red);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanPerformSaveLayerWithBounds) {
Canvas canvas;
Paint red;
red.color = Color::Red();
Paint green;
green.color = Color::Green();
Paint blue;
blue.color = Color::Blue();
Paint save;
save.color = Color::Black();
canvas.SaveLayer(save, Rect{0, 0, 50, 50});
canvas.DrawRect({0, 0, 100, 100}, red);
canvas.DrawRect({10, 10, 100, 100}, green);
canvas.DrawRect({20, 20, 100, 100}, blue);
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest,
CanPerformSaveLayerWithBoundsAndLargerIntermediateIsNotAllocated) {
Canvas canvas;
Paint red;
red.color = Color::Red();
Paint green;
green.color = Color::Green();
Paint blue;
blue.color = Color::Blue();
Paint save;
save.color = Color::Black().WithAlpha(0.5);
canvas.SaveLayer(save, Rect{0, 0, 100000, 100000});
canvas.DrawRect({0, 0, 100, 100}, red);
canvas.DrawRect({10, 10, 100, 100}, green);
canvas.DrawRect({20, 20, 100, 100}, blue);
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderRoundedRectWithNonUniformRadii) {
Canvas canvas;
Paint paint;
paint.color = Color::Red();
PathBuilder::RoundingRadii radii;
radii.top_left = {50, 25};
radii.top_right = {25, 50};
radii.bottom_right = {50, 25};
radii.bottom_left = {25, 50};
auto path =
PathBuilder{}.AddRoundedRect(Rect{100, 100, 500, 500}, radii).TakePath();
canvas.DrawPath(path, paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderDifferencePaths) {
Canvas canvas;
Paint paint;
paint.color = Color::Red();
PathBuilder builder;
PathBuilder::RoundingRadii radii;
radii.top_left = {50, 25};
radii.top_right = {25, 50};
radii.bottom_right = {50, 25};
radii.bottom_left = {25, 50};
builder.AddRoundedRect({100, 100, 200, 200}, radii);
builder.AddCircle({200, 200}, 50);
auto path = builder.TakePath(FillType::kOdd);
canvas.DrawImage(
std::make_shared<Image>(CreateTextureForFixture("boston.jpg")), {10, 10},
Paint{});
canvas.DrawPath(path, paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
static sk_sp<SkData> OpenFixtureAsSkData(const char* fixture_name) {
auto mapping = flutter::testing::OpenFixtureAsMapping(fixture_name);
if (!mapping) {
return nullptr;
}
auto data = SkData::MakeWithProc(
mapping->GetMapping(), mapping->GetSize(),
[](const void* ptr, void* context) {
delete reinterpret_cast<fml::Mapping*>(context);
},
mapping.get());
mapping.release();
return data;
}
struct TextRenderOptions {
Scalar font_size = 50;
Scalar alpha = 1;
Point position = Vector2(100, 200);
};
bool RenderTextInCanvasSkia(const std::shared_ptr<Context>& context,
Canvas& canvas,
const std::string& text,
const std::string& font_fixture,
TextRenderOptions options = {}) {
// Draw the baseline.
canvas.DrawRect({options.position.x - 50, options.position.y, 900, 10},
Paint{.color = Color::Aqua().WithAlpha(0.25)});
// Mark the point at which the text is drawn.
canvas.DrawCircle(options.position, 5.0,
Paint{.color = Color::Red().WithAlpha(0.25)});
// Construct the text blob.
auto mapping = OpenFixtureAsSkData(font_fixture.c_str());
if (!mapping) {
return false;
}
SkFont sk_font(SkTypeface::MakeFromData(mapping), options.font_size);
auto blob = SkTextBlob::MakeFromString(text.c_str(), sk_font);
if (!blob) {
return false;
}
// Create the Impeller text frame and draw it at the designated baseline.
auto maybe_frame = MakeTextFrameFromTextBlobSkia(blob);
if (!maybe_frame.has_value()) {
return false;
}
auto frame = maybe_frame.value();
Paint text_paint;
text_paint.color = Color::Yellow().WithAlpha(options.alpha);
canvas.DrawTextFrame(frame, options.position, text_paint);
return true;
}
bool RenderTextInCanvasSTB(const std::shared_ptr<Context>& context,
Canvas& canvas,
const std::string& text,
const std::string& font_fixture,
TextRenderOptions options = {}) {
// Draw the baseline.
canvas.DrawRect({options.position.x - 50, options.position.y, 900, 10},
Paint{.color = Color::Aqua().WithAlpha(0.25)});
// Mark the point at which the text is drawn.
canvas.DrawCircle(options.position, 5.0,
Paint{.color = Color::Red().WithAlpha(0.25)});
// Construct the text blob.
auto mapping = flutter::testing::OpenFixtureAsMapping(font_fixture.c_str());
if (!mapping) {
return false;
}
auto typeface_stb = std::make_shared<TypefaceSTB>(std::move(mapping));
auto frame = MakeTextFrameSTB(
typeface_stb, Font::Metrics{.point_size = options.font_size}, text);
Paint text_paint;
text_paint.color = Color::Yellow().WithAlpha(options.alpha);
canvas.DrawTextFrame(frame, options.position, text_paint);
return true;
}
TEST_P(AiksTest, CanRenderTextFrame) {
Canvas canvas;
canvas.DrawPaint({.color = Color(0.1, 0.1, 0.1, 1.0)});
ASSERT_TRUE(RenderTextInCanvasSkia(
GetContext(), canvas, "the quick brown fox jumped over the lazy dog!.?",
"Roboto-Regular.ttf"));
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderTextFrameSTB) {
Canvas canvas;
canvas.DrawPaint({.color = Color(0.1, 0.1, 0.1, 1.0)});
ASSERT_TRUE(RenderTextInCanvasSTB(
GetContext(), canvas, "the quick brown fox jumped over the lazy dog!.?",
"Roboto-Regular.ttf"));
SetTypographerContext(TypographerContextSTB::Make());
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, TextFrameSubpixelAlignment) {
std::array<Scalar, 20> phase_offsets;
for (Scalar& offset : phase_offsets) {
auto rand = std::rand(); // NOLINT
offset = (static_cast<float>(rand) / static_cast<float>(RAND_MAX)) * k2Pi;
}
auto callback = [&](AiksContext& renderer) -> std::optional<Picture> {
static float font_size = 20;
static float phase_variation = 0.2;
static float speed = 0.5;
static float magnitude = 100;
ImGui::Begin("Controls", nullptr, ImGuiWindowFlags_AlwaysAutoResize);
ImGui::SliderFloat("Font size", &font_size, 5, 50);
ImGui::SliderFloat("Phase variation", &phase_variation, 0, 1);
ImGui::SliderFloat("Oscillation speed", &speed, 0, 2);
ImGui::SliderFloat("Oscillation magnitude", &magnitude, 0, 300);
ImGui::End();
Canvas canvas;
canvas.Scale(GetContentScale());
for (size_t i = 0; i < phase_offsets.size(); i++) {
auto position = Point(
200 + magnitude * std::sin((-phase_offsets[i] * phase_variation +
GetSecondsElapsed() * speed)), //
200 + i * font_size * 1.1 //
);
if (!RenderTextInCanvasSkia(
GetContext(), canvas,
"the quick brown fox jumped over "
"the lazy dog!.?",
"Roboto-Regular.ttf",
{.font_size = font_size, .position = position})) {
return std::nullopt;
}
}
return canvas.EndRecordingAsPicture();
};
ASSERT_TRUE(OpenPlaygroundHere(callback));
}
TEST_P(AiksTest, CanRenderItalicizedText) {
Canvas canvas;
canvas.DrawPaint({.color = Color(0.1, 0.1, 0.1, 1.0)});
ASSERT_TRUE(RenderTextInCanvasSkia(
GetContext(), canvas, "the quick brown fox jumped over the lazy dog!.?",
"HomemadeApple.ttf"));
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderEmojiTextFrame) {
Canvas canvas;
canvas.DrawPaint({.color = Color(0.1, 0.1, 0.1, 1.0)});
ASSERT_TRUE(RenderTextInCanvasSkia(GetContext(), canvas,
"😀 😃 😄 😁 😆 😅 😂 🤣 🥲 😊",
#if FML_OS_MACOSX
"Apple Color Emoji.ttc"));
#else
"NotoColorEmoji.ttf"));
#endif
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderEmojiTextFrameWithAlpha) {
Canvas canvas;
canvas.DrawPaint({.color = Color(0.1, 0.1, 0.1, 1.0)});
ASSERT_TRUE(RenderTextInCanvasSkia(GetContext(), canvas,
"😀 😃 😄 😁 😆 😅 😂 🤣 🥲 😊",
#if FML_OS_MACOSX
"Apple Color Emoji.ttc", { .alpha = 0.5 }
#else
"NotoColorEmoji.ttf", {.alpha = 0.5}
#endif
));
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderTextInSaveLayer) {
Canvas canvas;
canvas.DrawPaint({.color = Color(0.1, 0.1, 0.1, 1.0)});
canvas.Translate({100, 100});
canvas.Scale(Vector2{0.5, 0.5});
// Blend the layer with the parent pass using kClear to expose the coverage.
canvas.SaveLayer({.blend_mode = BlendMode::kClear});
ASSERT_TRUE(RenderTextInCanvasSkia(
GetContext(), canvas, "the quick brown fox jumped over the lazy dog!.?",
"Roboto-Regular.ttf"));
canvas.Restore();
// Render the text again over the cleared coverage rect.
ASSERT_TRUE(RenderTextInCanvasSkia(
GetContext(), canvas, "the quick brown fox jumped over the lazy dog!.?",
"Roboto-Regular.ttf"));
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderTextOutsideBoundaries) {
Canvas canvas;
canvas.Translate({200, 150});
// Construct the text blob.
auto mapping = OpenFixtureAsSkData("wtf.otf");
ASSERT_NE(mapping, nullptr);
Scalar font_size = 80;
SkFont sk_font(SkTypeface::MakeFromData(mapping), font_size);
Paint text_paint;
text_paint.color = Color::Blue().WithAlpha(0.8);
struct {
Point position;
const char* text;
} text[] = {{Point(0, 0), "0F0F0F0"},
{Point(1, 2), "789"},
{Point(1, 3), "456"},
{Point(1, 4), "123"},
{Point(0, 6), "0F0F0F0"}};
for (auto& t : text) {
canvas.Save();
canvas.Translate(t.position * Point(font_size * 2, font_size * 1.1));
{
auto blob = SkTextBlob::MakeFromString(t.text, sk_font);
ASSERT_NE(blob, nullptr);
auto frame = MakeTextFrameFromTextBlobSkia(blob).value();
canvas.DrawTextFrame(frame, Point(), text_paint);
}
canvas.Restore();
}
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, TextRotated) {
Canvas canvas;
canvas.Scale(GetContentScale());
canvas.DrawPaint({.color = Color(0.1, 0.1, 0.1, 1.0)});
canvas.Transform(Matrix(0.25, -0.3, 0, -0.002, //
0, 0.5, 0, 0, //
0, 0, 0.3, 0, //
100, 100, 0, 1.3));
ASSERT_TRUE(RenderTextInCanvasSkia(
GetContext(), canvas, "the quick brown fox jumped over the lazy dog!.?",
"Roboto-Regular.ttf"));
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanDrawPaint) {
Canvas canvas;
canvas.Scale(Vector2(0.2, 0.2));
canvas.DrawPaint({.color = Color::MediumTurquoise()});
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanDrawPaintMultipleTimes) {
Canvas canvas;
canvas.Scale(Vector2(0.2, 0.2));
canvas.DrawPaint({.color = Color::MediumTurquoise()});
canvas.DrawPaint({.color = Color::Color::OrangeRed().WithAlpha(0.5)});
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanDrawPaintWithAdvancedBlend) {
Canvas canvas;
canvas.Scale(Vector2(0.2, 0.2));
canvas.DrawPaint({.color = Color::MediumTurquoise()});
canvas.DrawPaint({.color = Color::Color::OrangeRed().WithAlpha(0.5),
.blend_mode = BlendMode::kHue});
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
#define BLEND_MODE_TUPLE(blend_mode) {#blend_mode, BlendMode::k##blend_mode},
struct BlendModeSelection {
std::vector<const char*> blend_mode_names;
std::vector<BlendMode> blend_mode_values;
};
static BlendModeSelection GetBlendModeSelection() {
std::vector<const char*> blend_mode_names;
std::vector<BlendMode> blend_mode_values;
{
const std::vector<std::tuple<const char*, BlendMode>> blends = {
IMPELLER_FOR_EACH_BLEND_MODE(BLEND_MODE_TUPLE)};
assert(blends.size() ==
static_cast<size_t>(Entity::kLastAdvancedBlendMode) + 1);
for (const auto& [name, mode] : blends) {
blend_mode_names.push_back(name);
blend_mode_values.push_back(mode);
}
}
return {blend_mode_names, blend_mode_values};
}
TEST_P(AiksTest, CanDrawPaintMultipleTimesInteractive) {
auto modes = GetBlendModeSelection();
auto callback = [&](AiksContext& renderer) -> std::optional<Picture> {
static Color background = Color::MediumTurquoise();
static Color foreground = Color::Color::OrangeRed().WithAlpha(0.5);
static int current_blend_index = 3;
ImGui::Begin("Controls", nullptr, ImGuiWindowFlags_AlwaysAutoResize);
{
ImGui::ColorEdit4("Background", reinterpret_cast<float*>(&background));
ImGui::ColorEdit4("Foreground", reinterpret_cast<float*>(&foreground));
ImGui::ListBox("Blend mode", &current_blend_index,
modes.blend_mode_names.data(),
modes.blend_mode_names.size());
}
ImGui::End();
Canvas canvas;
canvas.Scale(Vector2(0.2, 0.2));
canvas.DrawPaint({.color = background});
canvas.DrawPaint(
{.color = foreground,
.blend_mode = static_cast<BlendMode>(current_blend_index)});
return canvas.EndRecordingAsPicture();
};
ASSERT_TRUE(OpenPlaygroundHere(callback));
}
TEST_P(AiksTest, PaintBlendModeIsRespected) {
Paint paint;
Canvas canvas;
// Default is kSourceOver.
paint.color = Color(1, 0, 0, 0.5);
canvas.DrawCircle(Point(150, 200), 100, paint);
paint.color = Color(0, 1, 0, 0.5);
canvas.DrawCircle(Point(250, 200), 100, paint);
paint.blend_mode = BlendMode::kPlus;
paint.color = Color::Red();
canvas.DrawCircle(Point(450, 250), 100, paint);
paint.color = Color::Green();
canvas.DrawCircle(Point(550, 250), 100, paint);
paint.color = Color::Blue();
canvas.DrawCircle(Point(500, 150), 100, paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, ColorWheel) {
// Compare with https://fiddle.skia.org/c/@BlendModes
BlendModeSelection blend_modes = GetBlendModeSelection();
auto draw_color_wheel = [](Canvas& canvas) {
/// color_wheel_sampler: r=0 -> fuchsia, r=2pi/3 -> yellow, r=4pi/3 ->
/// cyan domain: r >= 0 (because modulo used is non euclidean)
auto color_wheel_sampler = [](Radians r) {
Scalar x = r.radians / k2Pi + 1;
// https://www.desmos.com/calculator/6nhjelyoaj
auto color_cycle = [](Scalar x) {
Scalar cycle = std::fmod(x, 6.0f);
return std::max(0.0f, std::min(1.0f, 2 - std::abs(2 - cycle)));
};
return Color(color_cycle(6 * x + 1), //
color_cycle(6 * x - 1), //
color_cycle(6 * x - 3), //
1);
};
Paint paint;
paint.blend_mode = BlendMode::kSourceOver;
// Draw a fancy color wheel for the backdrop.
// https://www.desmos.com/calculator/xw7kafthwd
const int max_dist = 900;
for (int i = 0; i <= 900; i++) {
Radians r(kPhi / k2Pi * i);
Scalar distance = r.radians / std::powf(4.12, 0.0026 * r.radians);
Scalar normalized_distance = static_cast<Scalar>(i) / max_dist;
paint.color =
color_wheel_sampler(r).WithAlpha(1.0f - normalized_distance);
Point position(distance * std::sin(r.radians),
-distance * std::cos(r.radians));
canvas.DrawCircle(position, 9 + normalized_distance * 3, paint);
}
};
std::shared_ptr<Image> color_wheel_image;
Matrix color_wheel_transform;
auto callback = [&](AiksContext& renderer) -> std::optional<Picture> {
// UI state.
static bool cache_the_wheel = true;
static int current_blend_index = 3;
static float dst_alpha = 1;
static float src_alpha = 1;
static Color color0 = Color::Red();
static Color color1 = Color::Green();
static Color color2 = Color::Blue();
ImGui::Begin("Controls", nullptr, ImGuiWindowFlags_AlwaysAutoResize);
{
ImGui::Checkbox("Cache the wheel", &cache_the_wheel);
ImGui::ListBox("Blending mode", &current_blend_index,
blend_modes.blend_mode_names.data(),
blend_modes.blend_mode_names.size());
ImGui::SliderFloat("Source alpha", &src_alpha, 0, 1);
ImGui::ColorEdit4("Color A", reinterpret_cast<float*>(&color0));
ImGui::ColorEdit4("Color B", reinterpret_cast<float*>(&color1));
ImGui::ColorEdit4("Color C", reinterpret_cast<float*>(&color2));
ImGui::SliderFloat("Destination alpha", &dst_alpha, 0, 1);
}
ImGui::End();
static Point content_scale;
Point new_content_scale = GetContentScale();
if (!cache_the_wheel || new_content_scale != content_scale) {
content_scale = new_content_scale;
// Render the color wheel to an image.
Canvas canvas;
canvas.Scale(content_scale);
canvas.Translate(Vector2(500, 400));
canvas.Scale(Vector2(3, 3));
draw_color_wheel(canvas);
auto color_wheel_picture = canvas.EndRecordingAsPicture();
auto snapshot = color_wheel_picture.Snapshot(renderer);
if (!snapshot.has_value() || !snapshot->texture) {
return std::nullopt;
}
color_wheel_image = std::make_shared<Image>(snapshot->texture);
color_wheel_transform = snapshot->transform;
}
Canvas canvas;
// Blit the color wheel backdrop to the screen with managed alpha.
canvas.SaveLayer({.color = Color::White().WithAlpha(dst_alpha),
.blend_mode = BlendMode::kSource});
{
canvas.DrawPaint({.color = Color::White()});
canvas.Save();
canvas.Transform(color_wheel_transform);
canvas.DrawImage(color_wheel_image, Point(), Paint());
canvas.Restore();
}
canvas.Restore();
canvas.Scale(content_scale);
canvas.Translate(Vector2(500, 400));
canvas.Scale(Vector2(3, 3));
// Draw 3 circles to a subpass and blend it in.
canvas.SaveLayer(
{.color = Color::White().WithAlpha(src_alpha),
.blend_mode = blend_modes.blend_mode_values[current_blend_index]});
{
Paint paint;
paint.blend_mode = BlendMode::kPlus;
const Scalar x = std::sin(k2Pi / 3);
const Scalar y = -std::cos(k2Pi / 3);
paint.color = color0;
canvas.DrawCircle(Point(-x, y) * 45, 65, paint);
paint.color = color1;
canvas.DrawCircle(Point(0, -1) * 45, 65, paint);
paint.color = color2;
canvas.DrawCircle(Point(x, y) * 45, 65, paint);
}
canvas.Restore();
return canvas.EndRecordingAsPicture();
};
ASSERT_TRUE(OpenPlaygroundHere(callback));
}
TEST_P(AiksTest, TransformMultipliesCorrectly) {
Canvas canvas;
ASSERT_MATRIX_NEAR(canvas.GetCurrentTransformation(), Matrix());
// clang-format off
canvas.Translate(Vector3(100, 200));
ASSERT_MATRIX_NEAR(
canvas.GetCurrentTransformation(),
Matrix( 1, 0, 0, 0,
0, 1, 0, 0,
0, 0, 1, 0,
100, 200, 0, 1));
canvas.Rotate(Radians(kPiOver2));
ASSERT_MATRIX_NEAR(
canvas.GetCurrentTransformation(),
Matrix( 0, 1, 0, 0,
-1, 0, 0, 0,
0, 0, 1, 0,
100, 200, 0, 1));
canvas.Scale(Vector3(2, 3));
ASSERT_MATRIX_NEAR(
canvas.GetCurrentTransformation(),
Matrix( 0, 2, 0, 0,
-3, 0, 0, 0,
0, 0, 0, 0,
100, 200, 0, 1));
canvas.Translate(Vector3(100, 200));
ASSERT_MATRIX_NEAR(
canvas.GetCurrentTransformation(),
Matrix( 0, 2, 0, 0,
-3, 0, 0, 0,
0, 0, 0, 0,
-500, 400, 0, 1));
// clang-format on
}
TEST_P(AiksTest, SolidStrokesRenderCorrectly) {
// Compare with https://fiddle.skia.org/c/027392122bec8ac2b5d5de00a4b9bbe2
auto callback = [&](AiksContext& renderer) -> std::optional<Picture> {
static Color color = Color::Black().WithAlpha(0.5);
static float scale = 3;
static bool add_circle_clip = true;
ImGui::Begin("Controls", nullptr, ImGuiWindowFlags_AlwaysAutoResize);
ImGui::ColorEdit4("Color", reinterpret_cast<float*>(&color));
ImGui::SliderFloat("Scale", &scale, 0, 6);
ImGui::Checkbox("Circle clip", &add_circle_clip);
ImGui::End();
Canvas canvas;
canvas.Scale(GetContentScale());
Paint paint;
paint.color = Color::White();
canvas.DrawPaint(paint);
paint.color = color;
paint.style = Paint::Style::kStroke;
paint.stroke_width = 10;
Path path = PathBuilder{}
.MoveTo({20, 20})
.QuadraticCurveTo({60, 20}, {60, 60})
.Close()
.MoveTo({60, 20})
.QuadraticCurveTo({60, 60}, {20, 60})
.TakePath();
canvas.Scale(Vector2(scale, scale));
if (add_circle_clip) {
auto [handle_a, handle_b] = IMPELLER_PLAYGROUND_LINE(
Point(60, 300), Point(600, 300), 20, Color::Red(), Color::Red());
auto screen_to_canvas = canvas.GetCurrentTransformation().Invert();
Point point_a = screen_to_canvas * handle_a * GetContentScale();
Point point_b = screen_to_canvas * handle_b * GetContentScale();
Point middle = (point_a + point_b) / 2;
auto radius = point_a.GetDistance(middle);
canvas.ClipPath(PathBuilder{}.AddCircle(middle, radius).TakePath());
}
for (auto join : {Join::kBevel, Join::kRound, Join::kMiter}) {
paint.stroke_join = join;
for (auto cap : {Cap::kButt, Cap::kSquare, Cap::kRound}) {
paint.stroke_cap = cap;
canvas.DrawPath(path, paint);
canvas.Translate({80, 0});
}
canvas.Translate({-240, 60});
}
return canvas.EndRecordingAsPicture();
};
ASSERT_TRUE(OpenPlaygroundHere(callback));
}
TEST_P(AiksTest, GradientStrokesRenderCorrectly) {
// Compare with https://fiddle.skia.org/c/027392122bec8ac2b5d5de00a4b9bbe2
auto callback = [&](AiksContext& renderer) -> std::optional<Picture> {
static float scale = 3;
static bool add_circle_clip = true;
const char* tile_mode_names[] = {"Clamp", "Repeat", "Mirror", "Decal"};
const Entity::TileMode tile_modes[] = {
Entity::TileMode::kClamp, Entity::TileMode::kRepeat,
Entity::TileMode::kMirror, Entity::TileMode::kDecal};
static int selected_tile_mode = 0;
static float alpha = 1;
ImGui::Begin("Controls", nullptr, ImGuiWindowFlags_AlwaysAutoResize);
ImGui::SliderFloat("Scale", &scale, 0, 6);
ImGui::Checkbox("Circle clip", &add_circle_clip);
ImGui::SliderFloat("Alpha", &alpha, 0, 1);
ImGui::Combo("Tile mode", &selected_tile_mode, tile_mode_names,
sizeof(tile_mode_names) / sizeof(char*));
ImGui::End();
Canvas canvas;
canvas.Scale(GetContentScale());
Paint paint;
paint.color = Color::White();
canvas.DrawPaint(paint);
paint.style = Paint::Style::kStroke;
paint.color = Color(1.0, 1.0, 1.0, alpha);
paint.stroke_width = 10;
auto tile_mode = tile_modes[selected_tile_mode];
std::vector<Color> colors = {Color{0.9568, 0.2627, 0.2118, 1.0},
Color{0.1294, 0.5882, 0.9529, 1.0}};
std::vector<Scalar> stops = {0.0, 1.0};
paint.color_source = ColorSource::MakeLinearGradient(
{0, 0}, {50, 50}, std::move(colors), std::move(stops), tile_mode, {});
Path path = PathBuilder{}
.MoveTo({20, 20})
.QuadraticCurveTo({60, 20}, {60, 60})
.Close()
.MoveTo({60, 20})
.QuadraticCurveTo({60, 60}, {20, 60})
.TakePath();
canvas.Scale(Vector2(scale, scale));
if (add_circle_clip) {
auto [handle_a, handle_b] = IMPELLER_PLAYGROUND_LINE(
Point(60, 300), Point(600, 300), 20, Color::Red(), Color::Red());
auto screen_to_canvas = canvas.GetCurrentTransformation().Invert();
Point point_a = screen_to_canvas * handle_a * GetContentScale();
Point point_b = screen_to_canvas * handle_b * GetContentScale();
Point middle = (point_a + point_b) / 2;
auto radius = point_a.GetDistance(middle);
canvas.ClipPath(PathBuilder{}.AddCircle(middle, radius).TakePath());
}
for (auto join : {Join::kBevel, Join::kRound, Join::kMiter}) {
paint.stroke_join = join;
for (auto cap : {Cap::kButt, Cap::kSquare, Cap::kRound}) {
paint.stroke_cap = cap;
canvas.DrawPath(path, paint);
canvas.Translate({80, 0});
}
canvas.Translate({-240, 60});
}
return canvas.EndRecordingAsPicture();
};
ASSERT_TRUE(OpenPlaygroundHere(callback));
}
TEST_P(AiksTest, CoverageOriginShouldBeAccountedForInSubpasses) {
auto callback = [&](AiksContext& renderer) -> std::optional<Picture> {
Canvas canvas;
canvas.Scale(GetContentScale());
Paint alpha;
alpha.color = Color::Red().WithAlpha(0.5);
auto current = Point{25, 25};
const auto offset = Point{25, 25};
const auto size = Size(100, 100);
auto [b0, b1] = IMPELLER_PLAYGROUND_LINE(Point(40, 40), Point(160, 160), 10,
Color::White(), Color::White());
auto bounds = Rect::MakeLTRB(b0.x, b0.y, b1.x, b1.y);
canvas.DrawRect(bounds, Paint{.color = Color::Yellow(),
.stroke_width = 5.0f,
.style = Paint::Style::kStroke});
canvas.SaveLayer(alpha, bounds);
canvas.DrawRect({current, size}, Paint{.color = Color::Red()});
canvas.DrawRect({current += offset, size}, Paint{.color = Color::Green()});
canvas.DrawRect({current += offset, size}, Paint{.color = Color::Blue()});
canvas.Restore();
return canvas.EndRecordingAsPicture();
};
ASSERT_TRUE(OpenPlaygroundHere(callback));
}
TEST_P(AiksTest, DrawRectStrokesRenderCorrectly) {
Canvas canvas;
Paint paint;
paint.color = Color::Red();
paint.style = Paint::Style::kStroke;
paint.stroke_width = 10;
canvas.Translate({100, 100});
canvas.DrawPath(
PathBuilder{}.AddRect(Rect::MakeSize(Size{100, 100})).TakePath(),
{paint});
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, SaveLayerDrawsBehindSubsequentEntities) {
// Compare with https://fiddle.skia.org/c/9e03de8567ffb49e7e83f53b64bcf636
Canvas canvas;
Paint paint;
paint.color = Color::Black();
Rect rect(25, 25, 25, 25);
canvas.DrawRect(rect, paint);
canvas.Translate({10, 10});
canvas.SaveLayer({});
paint.color = Color::Green();
canvas.DrawRect(rect, paint);
canvas.Restore();
canvas.Translate({10, 10});
paint.color = Color::Red();
canvas.DrawRect(rect, paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, SiblingSaveLayerBoundsAreRespected) {
Canvas canvas;
Paint paint;
Rect rect(0, 0, 1000, 1000);
// Black, green, and red squares offset by [10, 10].
{
canvas.SaveLayer({}, Rect::MakeXYWH(25, 25, 25, 25));
paint.color = Color::Black();
canvas.DrawRect(rect, paint);
canvas.Restore();
}
{
canvas.SaveLayer({}, Rect::MakeXYWH(35, 35, 25, 25));
paint.color = Color::Green();
canvas.DrawRect(rect, paint);
canvas.Restore();
}
{
canvas.SaveLayer({}, Rect::MakeXYWH(45, 45, 25, 25));
paint.color = Color::Red();
canvas.DrawRect(rect, paint);
canvas.Restore();
}
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderClippedLayers) {
Canvas canvas;
canvas.DrawPaint({.color = Color::White()});
// Draw a green circle on the screen.
{
// Increase the clip depth for the savelayer to contend with.
canvas.ClipPath(PathBuilder{}.AddCircle({100, 100}, 50).TakePath());
canvas.SaveLayer({}, Rect::MakeXYWH(50, 50, 100, 100));
// Fill the layer with white.
canvas.DrawRect(Rect::MakeSize(Size{400, 400}), {.color = Color::White()});
// Fill the layer with green, but do so with a color blend that can't be
// collapsed into the parent pass.
canvas.DrawRect(
Rect::MakeSize(Size{400, 400}),
{.color = Color::Green(), .blend_mode = BlendMode::kColorBurn});
}
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, SaveLayerFiltersScaleWithTransform) {
Canvas canvas;
canvas.Scale(GetContentScale());
canvas.Translate(Vector2(100, 100));
auto texture = std::make_shared<Image>(CreateTextureForFixture("boston.jpg"));
auto draw_image_layer = [&canvas, &texture](const Paint& paint) {
canvas.SaveLayer(paint);
canvas.DrawImage(texture, {}, Paint{});
canvas.Restore();
};
Paint effect_paint;
effect_paint.mask_blur_descriptor = Paint::MaskBlurDescriptor{
.style = FilterContents::BlurStyle::kNormal,
.sigma = Sigma{6},
};
draw_image_layer(effect_paint);
canvas.Translate(Vector2(300, 300));
canvas.Scale(Vector2(3, 3));
draw_image_layer(effect_paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
#if IMPELLER_ENABLE_3D
TEST_P(AiksTest, SceneColorSource) {
// Load up the scene.
auto mapping =
flutter::testing::OpenFixtureAsMapping("flutter_logo_baked.glb.ipscene");
ASSERT_NE(mapping, nullptr);
std::shared_ptr<scene::Node> gltf_scene = scene::Node::MakeFromFlatbuffer(
*mapping, *GetContext()->GetResourceAllocator());
ASSERT_NE(gltf_scene, nullptr);
auto callback = [&](AiksContext& renderer) -> std::optional<Picture> {
Paint paint;
ImGui::Begin("Controls", nullptr, ImGuiWindowFlags_AlwaysAutoResize);
static Scalar distance = 2;
ImGui::SliderFloat("Distance", &distance, 0, 4);
static Scalar y_pos = 0;
ImGui::SliderFloat("Y", &y_pos, -3, 3);
static Scalar fov = 45;
ImGui::SliderFloat("FOV", &fov, 1, 180);
ImGui::End();
Scalar angle = GetSecondsElapsed();
auto camera_position =
Vector3(distance * std::sin(angle), y_pos, -distance * std::cos(angle));
paint.color_source = ColorSource::MakeScene(
gltf_scene,
Matrix::MakePerspective(Degrees(fov), GetWindowSize(), 0.1, 1000) *
Matrix::MakeLookAt(camera_position, {0, 0, 0}, {0, 1, 0}));
Canvas canvas;
canvas.DrawPaint(Paint{.color = Color::MakeRGBA8(0xf9, 0xf9, 0xf9, 0xff)});
canvas.Scale(GetContentScale());
canvas.DrawPaint(paint);
return canvas.EndRecordingAsPicture();
};
ASSERT_TRUE(OpenPlaygroundHere(callback));
}
#endif // IMPELLER_ENABLE_3D
TEST_P(AiksTest, PaintWithFilters) {
// validate that a paint with a color filter "HasFilters", no other filters
// impact this setting.
Paint paint;
ASSERT_FALSE(paint.HasColorFilter());
paint.color_filter =
ColorFilter::MakeBlend(BlendMode::kSourceOver, Color::Blue());
ASSERT_TRUE(paint.HasColorFilter());
paint.image_filter = [](const FilterInput::Ref& input,
const Matrix& effect_transform, bool is_subpass) {
return FilterContents::MakeGaussianBlur(
input, Sigma(1.0), Sigma(1.0), FilterContents::BlurStyle::kNormal,
Entity::TileMode::kClamp, effect_transform);
};
ASSERT_TRUE(paint.HasColorFilter());
paint.mask_blur_descriptor = {};
ASSERT_TRUE(paint.HasColorFilter());
paint.color_filter = nullptr;
ASSERT_FALSE(paint.HasColorFilter());
}
TEST_P(AiksTest, OpacityPeepHoleApplicationTest) {
auto entity_pass = std::make_shared<EntityPass>();
auto rect = Rect::MakeLTRB(0, 0, 100, 100);
Paint paint;
paint.color = Color::White().WithAlpha(0.5);
paint.color_filter =
ColorFilter::MakeBlend(BlendMode::kSourceOver, Color::Blue());
// Paint has color filter, can't elide.
auto delegate = std::make_shared<OpacityPeepholePassDelegate>(paint);
ASSERT_FALSE(delegate->CanCollapseIntoParentPass(entity_pass.get()));
paint.color_filter = nullptr;
paint.image_filter = [](const FilterInput::Ref& input,
const Matrix& effect_transform, bool is_subpass) {
return FilterContents::MakeGaussianBlur(
input, Sigma(1.0), Sigma(1.0), FilterContents::BlurStyle::kNormal,
Entity::TileMode::kClamp, effect_transform);
};
// Paint has image filter, can't elide.
delegate = std::make_shared<OpacityPeepholePassDelegate>(paint);
ASSERT_FALSE(delegate->CanCollapseIntoParentPass(entity_pass.get()));
paint.image_filter = nullptr;
paint.color = Color::Red();
// Paint has no alpha, can't elide;
delegate = std::make_shared<OpacityPeepholePassDelegate>(paint);
ASSERT_FALSE(delegate->CanCollapseIntoParentPass(entity_pass.get()));
// Positive test.
Entity entity;
entity.SetContents(SolidColorContents::Make(
PathBuilder{}.AddRect(rect).TakePath(), Color::Red()));
entity_pass->AddEntity(entity);
paint.color = Color::Red().WithAlpha(0.5);
delegate = std::make_shared<OpacityPeepholePassDelegate>(paint);
ASSERT_TRUE(delegate->CanCollapseIntoParentPass(entity_pass.get()));
}
TEST_P(AiksTest, DrawPaintAbsorbsClears) {
Canvas canvas;
canvas.DrawPaint({.color = Color::Red(), .blend_mode = BlendMode::kSource});
canvas.DrawPaint({.color = Color::CornflowerBlue().WithAlpha(0.75),
.blend_mode = BlendMode::kSourceOver});
Picture picture = canvas.EndRecordingAsPicture();
auto expected = Color::Red().Blend(Color::CornflowerBlue().WithAlpha(0.75),
BlendMode::kSourceOver);
ASSERT_EQ(picture.pass->GetClearColor(), expected);
std::shared_ptr<ContextSpy> spy = ContextSpy::Make();
std::shared_ptr<Context> real_context = GetContext();
std::shared_ptr<ContextMock> mock_context = spy->MakeContext(real_context);
AiksContext renderer(mock_context, nullptr);
std::shared_ptr<Image> image = picture.ToImage(renderer, {300, 300});
ASSERT_EQ(spy->render_passes_.size(), 1llu);
std::shared_ptr<RenderPass> render_pass = spy->render_passes_[0];
ASSERT_EQ(render_pass->GetCommands().size(), 0llu);
}
TEST_P(AiksTest, DrawRectAbsorbsClears) {
Canvas canvas;
canvas.DrawRect({0, 0, 300, 300},
{.color = Color::Red(), .blend_mode = BlendMode::kSource});
canvas.DrawRect({0, 0, 300, 300},
{.color = Color::CornflowerBlue().WithAlpha(0.75),
.blend_mode = BlendMode::kSourceOver});
std::shared_ptr<ContextSpy> spy = ContextSpy::Make();
Picture picture = canvas.EndRecordingAsPicture();
std::shared_ptr<Context> real_context = GetContext();
std::shared_ptr<ContextMock> mock_context = spy->MakeContext(real_context);
AiksContext renderer(mock_context, nullptr);
std::shared_ptr<Image> image = picture.ToImage(renderer, {300, 300});
ASSERT_EQ(spy->render_passes_.size(), 1llu);
std::shared_ptr<RenderPass> render_pass = spy->render_passes_[0];
ASSERT_EQ(render_pass->GetCommands().size(), 0llu);
}
TEST_P(AiksTest, DrawRectAbsorbsClearsNegativeRRect) {
Canvas canvas;
canvas.DrawRRect({0, 0, 300, 300}, 5.0,
{.color = Color::Red(), .blend_mode = BlendMode::kSource});
canvas.DrawRRect({0, 0, 300, 300}, 5.0,
{.color = Color::CornflowerBlue().WithAlpha(0.75),
.blend_mode = BlendMode::kSourceOver});
std::shared_ptr<ContextSpy> spy = ContextSpy::Make();
Picture picture = canvas.EndRecordingAsPicture();
std::shared_ptr<Context> real_context = GetContext();
std::shared_ptr<ContextMock> mock_context = spy->MakeContext(real_context);
AiksContext renderer(mock_context, nullptr);
std::shared_ptr<Image> image = picture.ToImage(renderer, {300, 300});
ASSERT_EQ(spy->render_passes_.size(), 1llu);
std::shared_ptr<RenderPass> render_pass = spy->render_passes_[0];
ASSERT_EQ(render_pass->GetCommands().size(), 2llu);
}
TEST_P(AiksTest, DrawRectAbsorbsClearsNegativeRotation) {
Canvas canvas;
canvas.Translate(Vector3(150.0, 150.0, 0.0));
canvas.Rotate(Degrees(45.0));
canvas.Translate(Vector3(-150.0, -150.0, 0.0));
canvas.DrawRect({0, 0, 300, 300},
{.color = Color::Red(), .blend_mode = BlendMode::kSource});
std::shared_ptr<ContextSpy> spy = ContextSpy::Make();
Picture picture = canvas.EndRecordingAsPicture();
std::shared_ptr<Context> real_context = GetContext();
std::shared_ptr<ContextMock> mock_context = spy->MakeContext(real_context);
AiksContext renderer(mock_context, nullptr);
std::shared_ptr<Image> image = picture.ToImage(renderer, {300, 300});
ASSERT_EQ(spy->render_passes_.size(), 1llu);
std::shared_ptr<RenderPass> render_pass = spy->render_passes_[0];
ASSERT_EQ(render_pass->GetCommands().size(), 1llu);
}
TEST_P(AiksTest, DrawRectAbsorbsClearsNegative) {
Canvas canvas;
canvas.DrawRect({0, 0, 300, 300},
{.color = Color::Red(), .blend_mode = BlendMode::kSource});
canvas.DrawRect({0, 0, 300, 300},
{.color = Color::CornflowerBlue().WithAlpha(0.75),
.blend_mode = BlendMode::kSourceOver});
std::shared_ptr<ContextSpy> spy = ContextSpy::Make();
Picture picture = canvas.EndRecordingAsPicture();
std::shared_ptr<Context> real_context = GetContext();
std::shared_ptr<ContextMock> mock_context = spy->MakeContext(real_context);
AiksContext renderer(mock_context, nullptr);
std::shared_ptr<Image> image = picture.ToImage(renderer, {301, 301});
ASSERT_EQ(spy->render_passes_.size(), 1llu);
std::shared_ptr<RenderPass> render_pass = spy->render_passes_[0];
ASSERT_EQ(render_pass->GetCommands().size(), 2llu);
}
TEST_P(AiksTest, ClipRectElidesNoOpClips) {
Canvas canvas(Rect(0, 0, 100, 100));
canvas.ClipRect(Rect(0, 0, 100, 100));
canvas.ClipRect(Rect(-100, -100, 300, 300));
canvas.DrawPaint({.color = Color::Red(), .blend_mode = BlendMode::kSource});
canvas.DrawPaint({.color = Color::CornflowerBlue().WithAlpha(0.75),
.blend_mode = BlendMode::kSourceOver});
Picture picture = canvas.EndRecordingAsPicture();
auto expected = Color::Red().Blend(Color::CornflowerBlue().WithAlpha(0.75),
BlendMode::kSourceOver);
ASSERT_EQ(picture.pass->GetClearColor(), expected);
std::shared_ptr<ContextSpy> spy = ContextSpy::Make();
std::shared_ptr<Context> real_context = GetContext();
std::shared_ptr<ContextMock> mock_context = spy->MakeContext(real_context);
AiksContext renderer(mock_context, nullptr);
std::shared_ptr<Image> image = picture.ToImage(renderer, {300, 300});
ASSERT_EQ(spy->render_passes_.size(), 1llu);
std::shared_ptr<RenderPass> render_pass = spy->render_passes_[0];
ASSERT_EQ(render_pass->GetCommands().size(), 0llu);
}
TEST_P(AiksTest, CollapsedDrawPaintInSubpass) {
Canvas canvas;
canvas.DrawPaint(
{.color = Color::Yellow(), .blend_mode = BlendMode::kSource});
canvas.SaveLayer({.blend_mode = BlendMode::kMultiply});
canvas.DrawPaint({.color = Color::CornflowerBlue().WithAlpha(0.75),
.blend_mode = BlendMode::kSourceOver});
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CollapsedDrawPaintInSubpassBackdropFilter) {
// Bug: https://github.com/flutter/flutter/issues/131576
Canvas canvas;
canvas.DrawPaint(
{.color = Color::Yellow(), .blend_mode = BlendMode::kSource});
canvas.SaveLayer({}, {},
[](const FilterInput::Ref& input,
const Matrix& effect_transform, bool is_subpass) {
return FilterContents::MakeGaussianBlur(input, Sigma(20.0),
Sigma(20.0));
});
canvas.DrawPaint(
{.color = Color::CornflowerBlue(), .blend_mode = BlendMode::kSourceOver});
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, ForegroundBlendSubpassCollapseOptimization) {
Canvas canvas;
canvas.SaveLayer({
.color_filter =
ColorFilter::MakeBlend(BlendMode::kColorDodge, Color::Red()),
});
canvas.Translate({500, 300, 0});
canvas.Rotate(Radians(2 * kPi / 3));
canvas.DrawRect({100, 100, 200, 200}, {.color = Color::Blue()});
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, ColorMatrixFilterSubpassCollapseOptimization) {
Canvas canvas;
canvas.SaveLayer({
.color_filter =
ColorFilter::MakeMatrix({.array =
{
-1.0, 0, 0, 1.0, 0, //
0, -1.0, 0, 1.0, 0, //
0, 0, -1.0, 1.0, 0, //
1.0, 1.0, 1.0, 1.0, 0 //
}}),
});
canvas.Translate({500, 300, 0});
canvas.Rotate(Radians(2 * kPi / 3));
canvas.DrawRect({100, 100, 200, 200}, {.color = Color::Blue()});
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, LinearToSrgbFilterSubpassCollapseOptimization) {
Canvas canvas;
canvas.SaveLayer({
.color_filter = ColorFilter::MakeLinearToSrgb(),
});
canvas.Translate({500, 300, 0});
canvas.Rotate(Radians(2 * kPi / 3));
canvas.DrawRect({100, 100, 200, 200}, {.color = Color::Blue()});
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, SrgbToLinearFilterSubpassCollapseOptimization) {
Canvas canvas;
canvas.SaveLayer({
.color_filter = ColorFilter::MakeSrgbToLinear(),
});
canvas.Translate({500, 300, 0});
canvas.Rotate(Radians(2 * kPi / 3));
canvas.DrawRect({100, 100, 200, 200}, {.color = Color::Blue()});
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
static Picture BlendModeTest(BlendMode blend_mode,
const std::shared_ptr<Image>& src_image,
const std::shared_ptr<Image>& dst_image) {
Color destination_color = Color::CornflowerBlue().WithAlpha(0.75);
auto source_colors = std::vector<Color>({Color::White().WithAlpha(0.75),
Color::LimeGreen().WithAlpha(0.75),
Color::Black().WithAlpha(0.75)});
Canvas canvas;
canvas.DrawPaint({.color = Color::Black()});
//----------------------------------------------------------------------------
/// 1. Save layer blending (top squares).
///
canvas.Save();
for (const auto& color : source_colors) {
canvas.Save();
{
canvas.ClipRect(Rect::MakeXYWH(50, 50, 100, 100));
// Perform the blend in a SaveLayer so that the initial backdrop color is
// fully transparent black. SourceOver blend the result onto the parent
// pass.
canvas.SaveLayer({});
{
canvas.DrawPaint({.color = destination_color});
// Draw the source color in an offscreen pass and blend it to the parent
// pass.
canvas.SaveLayer({.blend_mode = blend_mode});
{ //
canvas.DrawRect({50, 50, 100, 100}, {.color = color});
}
canvas.Restore();
}
canvas.Restore();
}
canvas.Restore();
canvas.Translate(Vector2(100, 0));
}
canvas.RestoreToCount(0);
//----------------------------------------------------------------------------
/// 2. CPU blend modes (bottom squares).
///
canvas.Save();
canvas.Translate({0, 100});
// Perform the blend in a SaveLayer so that the initial backdrop color is
// fully transparent black. SourceOver blend the result onto the parent pass.
canvas.SaveLayer({});
// canvas.DrawPaint({.color = destination_color});
for (const auto& color : source_colors) {
// Simply write the CPU blended color to the pass.
canvas.DrawRect({50, 50, 100, 100},
{.color = destination_color.Blend(color, blend_mode),
.blend_mode = BlendMode::kSourceOver});
canvas.Translate(Vector2(100, 0));
}
canvas.RestoreToCount(0);
//----------------------------------------------------------------------------
/// 3. Image blending (top right).
///
/// Compare these results with the images in the Flutter blend mode
/// documentation: https://api.flutter.dev/flutter/dart-ui/BlendMode.html
///
canvas.Save();
// canvas.ClipRect(Rect::MakeXYWH(500, 0, 500, 500));
canvas.SaveLayer({.blend_mode = BlendMode::kSourceOver});
{
canvas.DrawImage(dst_image, {400, 50}, {.blend_mode = BlendMode::kSource});
canvas.DrawImage(src_image, {400, 50}, {.blend_mode = blend_mode});
}
canvas.RestoreToCount(0);
return canvas.EndRecordingAsPicture();
}
#define BLEND_MODE_TEST(blend_mode) \
TEST_P(AiksTest, BlendMode##blend_mode) { \
auto src_image = std::make_shared<Image>( \
CreateTextureForFixture("blend_mode_src.png")); \
auto dst_image = std::make_shared<Image>( \
CreateTextureForFixture("blend_mode_dst.png")); \
OpenPlaygroundHere( \
BlendModeTest(BlendMode::k##blend_mode, src_image, dst_image)); \
}
IMPELLER_FOR_EACH_BLEND_MODE(BLEND_MODE_TEST)
TEST_P(AiksTest, TranslucentSaveLayerDrawsCorrectly) {
Canvas canvas;
canvas.DrawRect(Rect::MakeXYWH(100, 100, 300, 300), {.color = Color::Blue()});
canvas.SaveLayer({.color = Color::Black().WithAlpha(0.5)});
canvas.DrawRect(Rect::MakeXYWH(100, 500, 300, 300), {.color = Color::Blue()});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, TranslucentSaveLayerWithBlendColorFilterDrawsCorrectly) {
Canvas canvas;
canvas.DrawRect(Rect::MakeXYWH(100, 100, 300, 300), {.color = Color::Blue()});
canvas.SaveLayer({
.color = Color::Black().WithAlpha(0.5),
.color_filter =
ColorFilter::MakeBlend(BlendMode::kDestinationOver, Color::Red()),
});
canvas.DrawRect(Rect::MakeXYWH(100, 500, 300, 300), {.color = Color::Blue()});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, TranslucentSaveLayerWithBlendImageFilterDrawsCorrectly) {
Canvas canvas;
canvas.DrawRect(Rect::MakeXYWH(100, 100, 300, 300), {.color = Color::Blue()});
canvas.SaveLayer({
.color = Color::Black().WithAlpha(0.5),
.image_filter =
[](FilterInput::Ref input, const Matrix& effect_transform,
bool is_subpass) {
return ColorFilterContents::MakeBlend(
BlendMode::kDestinationOver, {std::move(input)}, Color::Red());
},
});
canvas.DrawRect(Rect::MakeXYWH(100, 500, 300, 300), {.color = Color::Blue()});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, TranslucentSaveLayerWithColorAndImageFilterDrawsCorrectly) {
Canvas canvas;
canvas.DrawRect(Rect::MakeXYWH(100, 100, 300, 300), {.color = Color::Blue()});
canvas.SaveLayer({
.color = Color::Black().WithAlpha(0.5),
.color_filter =
ColorFilter::MakeBlend(BlendMode::kDestinationOver, Color::Red()),
});
canvas.DrawRect(Rect::MakeXYWH(100, 500, 300, 300), {.color = Color::Blue()});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, TranslucentSaveLayerImageDrawsCorrectly) {
Canvas canvas;
auto image = std::make_shared<Image>(CreateTextureForFixture("airplane.jpg"));
canvas.DrawImage(image, {100, 100}, {});
canvas.SaveLayer({.color = Color::Black().WithAlpha(0.5)});
canvas.DrawImage(image, {100, 500}, {});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, TranslucentSaveLayerWithColorMatrixColorFilterDrawsCorrectly) {
Canvas canvas;
auto image = std::make_shared<Image>(CreateTextureForFixture("airplane.jpg"));
canvas.DrawImage(image, {100, 100}, {});
canvas.SaveLayer({
.color = Color::Black().WithAlpha(0.5),
.color_filter = ColorFilter::MakeMatrix({.array =
{
1, 0, 0, 0, 0, //
0, 1, 0, 0, 0, //
0, 0, 1, 0, 0, //
0, 0, 0, 2, 0 //
}}),
});
canvas.DrawImage(image, {100, 500}, {});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, TranslucentSaveLayerWithColorMatrixImageFilterDrawsCorrectly) {
Canvas canvas;
auto image = std::make_shared<Image>(CreateTextureForFixture("airplane.jpg"));
canvas.DrawImage(image, {100, 100}, {});
canvas.SaveLayer({
.color = Color::Black().WithAlpha(0.5),
.image_filter =
[](FilterInput::Ref input, const Matrix& effect_transform,
bool is_subpass) {
return ColorFilterContents::MakeColorMatrix({std::move(input)},
{.array = {
1, 0, 0, 0, 0, //
0, 1, 0, 0, 0, //
0, 0, 1, 0, 0, //
0, 0, 0, 2, 0 //
}});
},
});
canvas.DrawImage(image, {100, 500}, {});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest,
TranslucentSaveLayerWithColorFilterAndImageFilterDrawsCorrectly) {
Canvas canvas;
auto image = std::make_shared<Image>(CreateTextureForFixture("airplane.jpg"));
canvas.DrawImage(image, {100, 100}, {});
canvas.SaveLayer({
.color = Color::Black().WithAlpha(0.5),
.image_filter =
[](FilterInput::Ref input, const Matrix& effect_transform,
bool is_subpass) {
return ColorFilterContents::MakeColorMatrix(
{std::move(input)}, {.array = {
1, 0, 0, 0, 0, //
0, 1, 0, 0, 0, //
0, 0.2, 1, 0, 0, //
0, 0, 0, 0.5, 0 //
}});
},
.color_filter =
ColorFilter::MakeBlend(BlendMode::kModulate, Color::Green()),
});
canvas.DrawImage(image, {100, 500}, {});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, TranslucentSaveLayerWithAdvancedBlendModeDrawsCorrectly) {
Canvas canvas;
canvas.DrawRect({0, 0, 400, 400}, {.color = Color::Red()});
canvas.SaveLayer({
.color = Color::Black().WithAlpha(0.5),
.blend_mode = BlendMode::kLighten,
});
canvas.DrawCircle({200, 200}, 100, {.color = Color::Green()});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
/// This is a regression check for https://github.com/flutter/engine/pull/41129
/// The entire screen is green if successful. If failing, no frames will render,
/// or the entire screen will be transparent black.
TEST_P(AiksTest, CanRenderTinyOverlappingSubpasses) {
Canvas canvas;
canvas.DrawPaint({.color = Color::Red()});
// Draw two overlapping subpixel circles.
canvas.SaveLayer({});
canvas.DrawCircle({100, 100}, 0.1, {.color = Color::Yellow()});
canvas.Restore();
canvas.SaveLayer({});
canvas.DrawCircle({100, 100}, 0.1, {.color = Color::Yellow()});
canvas.Restore();
canvas.DrawPaint({.color = Color::Green()});
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
/// Tests that the debug checkerboard displays for offscreen textures when
/// enabled. Most of the complexity here is just to future proof by making pass
/// collapsing hard.
TEST_P(AiksTest, CanRenderOffscreenCheckerboard) {
Canvas canvas;
canvas.debug_options.offscreen_texture_checkerboard = true;
canvas.DrawPaint({.color = Color::AntiqueWhite()});
canvas.DrawCircle({400, 300}, 200,
{.color = Color::CornflowerBlue().WithAlpha(0.75)});
canvas.SaveLayer({.blend_mode = BlendMode::kMultiply});
{
canvas.DrawCircle({500, 400}, 200,
{.color = Color::DarkBlue().WithAlpha(0.75)});
canvas.DrawCircle({550, 450}, 200,
{.color = Color::LightCoral().WithAlpha(0.75),
.blend_mode = BlendMode::kLuminosity});
}
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, OpaqueEntitiesGetCoercedToSource) {
Canvas canvas;
canvas.Scale(Vector2(1.618, 1.618));
canvas.DrawCircle(Point(), 10,
{
.color = Color::CornflowerBlue(),
.blend_mode = BlendMode::kSourceOver,
});
Picture picture = canvas.EndRecordingAsPicture();
// Extract the SolidColorSource.
Entity entity;
std::shared_ptr<SolidColorContents> contents;
picture.pass->IterateAllEntities([&e = entity, &contents](Entity& entity) {
if (ScalarNearlyEqual(entity.GetTransformation().GetScale().x, 1.618f)) {
e = entity;
contents =
std::static_pointer_cast<SolidColorContents>(entity.GetContents());
return false;
}
return true;
});
ASSERT_TRUE(contents->IsOpaque());
ASSERT_EQ(entity.GetBlendMode(), BlendMode::kSource);
}
TEST_P(AiksTest, CanRenderDestructiveSaveLayer) {
Canvas canvas;
canvas.DrawPaint({.color = Color::Red()});
// Draw an empty savelayer with a destructive blend mode, which will replace
// the entire red screen with fully transparent black, except for the green
// circle drawn within the layer.
canvas.SaveLayer({.blend_mode = BlendMode::kSource});
canvas.DrawCircle({300, 300}, 100, {.color = Color::Green()});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderMaskBlurHugeSigma) {
Canvas canvas;
canvas.DrawCircle({400, 400}, 300,
{.color = Color::Green(),
.mask_blur_descriptor = Paint::MaskBlurDescriptor{
.style = FilterContents::BlurStyle::kNormal,
.sigma = Sigma(99999),
}});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderBackdropBlurInteractive) {
auto callback = [&](AiksContext& renderer) -> std::optional<Picture> {
auto [a, b] = IMPELLER_PLAYGROUND_LINE(Point(50, 50), Point(300, 200), 30,
Color::White(), Color::White());
Canvas canvas;
canvas.DrawCircle({100, 100}, 50, {.color = Color::CornflowerBlue()});
canvas.DrawCircle({300, 200}, 100, {.color = Color::GreenYellow()});
canvas.DrawCircle({140, 170}, 75, {.color = Color::DarkMagenta()});
canvas.DrawCircle({180, 120}, 100, {.color = Color::OrangeRed()});
canvas.ClipRRect(Rect::MakeLTRB(a.x, a.y, b.x, b.y), 20);
canvas.SaveLayer({.blend_mode = BlendMode::kSource}, std::nullopt,
[](const FilterInput::Ref& input,
const Matrix& effect_transform, bool is_subpass) {
return FilterContents::MakeGaussianBlur(
input, Sigma(20.0), Sigma(20.0),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kClamp, effect_transform);
});
canvas.Restore();
return canvas.EndRecordingAsPicture();
};
ASSERT_TRUE(OpenPlaygroundHere(callback));
}
TEST_P(AiksTest, CanRenderBackdropBlur) {
Canvas canvas;
canvas.DrawCircle({100, 100}, 50, {.color = Color::CornflowerBlue()});
canvas.DrawCircle({300, 200}, 100, {.color = Color::GreenYellow()});
canvas.DrawCircle({140, 170}, 75, {.color = Color::DarkMagenta()});
canvas.DrawCircle({180, 120}, 100, {.color = Color::OrangeRed()});
canvas.ClipRRect(Rect::MakeLTRB(75, 50, 375, 275), 20);
canvas.SaveLayer({.blend_mode = BlendMode::kSource}, std::nullopt,
[](const FilterInput::Ref& input,
const Matrix& effect_transform, bool is_subpass) {
return FilterContents::MakeGaussianBlur(
input, Sigma(30.0), Sigma(30.0),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kClamp, effect_transform);
});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderBackdropBlurHugeSigma) {
Canvas canvas;
canvas.DrawCircle({400, 400}, 300, {.color = Color::Green()});
canvas.SaveLayer({.blend_mode = BlendMode::kSource}, std::nullopt,
[](const FilterInput::Ref& input,
const Matrix& effect_transform, bool is_subpass) {
return FilterContents::MakeGaussianBlur(
input, Sigma(999999), Sigma(999999),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kClamp, effect_transform);
});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderClippedBlur) {
Canvas canvas;
canvas.ClipRect(Rect::MakeXYWH(100, 150, 400, 400));
canvas.DrawCircle(
{400, 400}, 200,
{
.color = Color::Green(),
.image_filter =
[](const FilterInput::Ref& input, const Matrix& effect_transform,
bool is_subpass) {
return FilterContents::MakeGaussianBlur(
input, Sigma(20), Sigma(20),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kClamp, effect_transform);
},
});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderForegroundBlendWithMaskBlur) {
// This case triggers the ForegroundPorterDuffBlend path. The color filter
// should apply to the color only, and respect the alpha mask.
Canvas canvas;
canvas.ClipRect(Rect::MakeXYWH(100, 150, 400, 400));
canvas.DrawCircle({400, 400}, 200,
{
.color = Color::White(),
.color_filter = ColorFilter::MakeBlend(
BlendMode::kSource, Color::Green()),
.mask_blur_descriptor =
Paint::MaskBlurDescriptor{
.style = FilterContents::BlurStyle::kNormal,
.sigma = Radius(20),
},
});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderForegroundAdvancedBlendWithMaskBlur) {
// This case triggers the ForegroundAdvancedBlend path. The color filter
// should apply to the color only, and respect the alpha mask.
Canvas canvas;
canvas.ClipRect(Rect::MakeXYWH(100, 150, 400, 400));
canvas.DrawCircle({400, 400}, 200,
{
.color = Color::White(),
.color_filter = ColorFilter::MakeBlend(
BlendMode::kColor, Color::Green()),
.mask_blur_descriptor =
Paint::MaskBlurDescriptor{
.style = FilterContents::BlurStyle::kNormal,
.sigma = Radius(20),
},
});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
// Regression test for https://github.com/flutter/flutter/issues/126701 .
TEST_P(AiksTest, CanRenderClippedRuntimeEffects) {
if (GetParam() != PlaygroundBackend::kMetal) {
GTEST_SKIP_("This backend doesn't support runtime effects.");
}
auto runtime_stage =
OpenAssetAsRuntimeStage("runtime_stage_example.frag.iplr");
ASSERT_TRUE(runtime_stage->IsDirty());
struct FragUniforms {
Vector2 iResolution;
Scalar iTime;
} frag_uniforms = {.iResolution = Vector2(400, 400), .iTime = 100.0};
auto uniform_data = std::make_shared<std::vector<uint8_t>>();
uniform_data->resize(sizeof(FragUniforms));
memcpy(uniform_data->data(), &frag_uniforms, sizeof(FragUniforms));
std::vector<RuntimeEffectContents::TextureInput> texture_inputs;
Paint paint;
paint.color_source = ColorSource::MakeRuntimeEffect(
runtime_stage, uniform_data, texture_inputs);
Canvas canvas;
canvas.Save();
canvas.ClipRRect(Rect{0, 0, 400, 400}, 10.0,
Entity::ClipOperation::kIntersect);
canvas.DrawRect(Rect{0, 0, 400, 400}, paint);
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanDrawPoints) {
std::vector<Point> points = {
{0, 0}, //
{100, 100}, //
{100, 0}, //
{0, 100}, //
{0, 0}, //
{48, 48}, //
{52, 52}, //
};
std::vector<PointStyle> caps = {
PointStyle::kRound,
PointStyle::kSquare,
};
Paint paint;
paint.color = Color::Yellow().WithAlpha(0.5);
Paint background;
background.color = Color::Black();
Canvas canvas;
canvas.DrawPaint(background);
canvas.Translate({200, 200});
canvas.DrawPoints(points, 10, paint, PointStyle::kRound);
canvas.Translate({150, 0});
canvas.DrawPoints(points, 10, paint, PointStyle::kSquare);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
// Regression test for https://github.com/flutter/flutter/issues/127374.
TEST_P(AiksTest, DrawAtlasWithColorAdvancedAndTransform) {
// Draws the image as four squares stiched together.
auto atlas = CreateTextureForFixture("bay_bridge.jpg");
auto size = atlas->GetSize();
auto image = std::make_shared<Image>(atlas);
// Divide image into four quadrants.
Scalar half_width = size.width / 2;
Scalar half_height = size.height / 2;
std::vector<Rect> texture_coordinates = {
Rect::MakeLTRB(0, 0, half_width, half_height),
Rect::MakeLTRB(half_width, 0, size.width, half_height),
Rect::MakeLTRB(0, half_height, half_width, size.height),
Rect::MakeLTRB(half_width, half_height, size.width, size.height)};
// Position quadrants adjacent to eachother.
std::vector<Matrix> transforms = {
Matrix::MakeTranslation({0, 0, 0}),
Matrix::MakeTranslation({half_width, 0, 0}),
Matrix::MakeTranslation({0, half_height, 0}),
Matrix::MakeTranslation({half_width, half_height, 0})};
std::vector<Color> colors = {Color::Red(), Color::Green(), Color::Blue(),
Color::Yellow()};
Paint paint;
Canvas canvas;
canvas.Scale({0.25, 0.25, 1.0});
canvas.DrawAtlas(image, transforms, texture_coordinates, colors,
BlendMode::kModulate, {}, std::nullopt, paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
// Regression test for https://github.com/flutter/flutter/issues/127374.
TEST_P(AiksTest, DrawAtlasAdvancedAndTransform) {
// Draws the image as four squares stiched together.
auto atlas = CreateTextureForFixture("bay_bridge.jpg");
auto size = atlas->GetSize();
auto image = std::make_shared<Image>(atlas);
// Divide image into four quadrants.
Scalar half_width = size.width / 2;
Scalar half_height = size.height / 2;
std::vector<Rect> texture_coordinates = {
Rect::MakeLTRB(0, 0, half_width, half_height),
Rect::MakeLTRB(half_width, 0, size.width, half_height),
Rect::MakeLTRB(0, half_height, half_width, size.height),
Rect::MakeLTRB(half_width, half_height, size.width, size.height)};
// Position quadrants adjacent to eachother.
std::vector<Matrix> transforms = {
Matrix::MakeTranslation({0, 0, 0}),
Matrix::MakeTranslation({half_width, 0, 0}),
Matrix::MakeTranslation({0, half_height, 0}),
Matrix::MakeTranslation({half_width, half_height, 0})};
Paint paint;
Canvas canvas;
canvas.Scale({0.25, 0.25, 1.0});
canvas.DrawAtlas(image, transforms, texture_coordinates, {},
BlendMode::kModulate, {}, std::nullopt, paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanDrawPointsWithTextureMap) {
auto texture = CreateTextureForFixture("table_mountain_nx.png",
/*enable_mipmapping=*/true);
std::vector<Point> points = {
{0, 0}, //
{100, 100}, //
{100, 0}, //
{0, 100}, //
{0, 0}, //
{48, 48}, //
{52, 52}, //
};
std::vector<PointStyle> caps = {
PointStyle::kRound,
PointStyle::kSquare,
};
Paint paint;
paint.color_source = ColorSource::MakeImage(texture, Entity::TileMode::kClamp,
Entity::TileMode::kClamp, {}, {});
Canvas canvas;
canvas.Translate({200, 200});
canvas.DrawPoints(points, 100, paint, PointStyle::kRound);
canvas.Translate({150, 0});
canvas.DrawPoints(points, 100, paint, PointStyle::kSquare);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
// This currently renders solid blue, as the support for text color sources was
// moved into DLDispatching. Path data requires the SkTextBlobs which are not
// used in impeller::TextFrames.
TEST_P(AiksTest, TextForegroundShaderWithTransform) {
auto mapping = OpenFixtureAsSkData("Roboto-Regular.ttf");
ASSERT_NE(mapping, nullptr);
Scalar font_size = 100;
SkFont sk_font(SkTypeface::MakeFromData(mapping), font_size);
Paint text_paint;
text_paint.color = Color::Blue();
std::vector<Color> colors = {Color{0.9568, 0.2627, 0.2118, 1.0},
Color{0.1294, 0.5882, 0.9529, 1.0}};
std::vector<Scalar> stops = {
0.0,
1.0,
};
text_paint.color_source = ColorSource::MakeLinearGradient(
{0, 0}, {100, 100}, std::move(colors), std::move(stops),
Entity::TileMode::kRepeat, {});
Canvas canvas;
canvas.Translate({100, 100});
canvas.Rotate(Radians(kPi / 4));
auto blob = SkTextBlob::MakeFromString("Hello", sk_font);
ASSERT_NE(blob, nullptr);
auto maybe_frame = MakeTextFrameFromTextBlobSkia(blob);
ASSERT_TRUE(maybe_frame.has_value());
if (!maybe_frame.has_value()) {
return;
}
auto frame = maybe_frame.value();
canvas.DrawTextFrame(frame, Point(), text_paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanCanvasDrawPicture) {
Canvas subcanvas;
subcanvas.DrawRect(Rect::MakeLTRB(-100, -50, 100, 50),
{.color = Color::CornflowerBlue()});
auto picture = subcanvas.EndRecordingAsPicture();
Canvas canvas;
canvas.Translate({200, 200});
canvas.Rotate(Radians(kPi / 4));
canvas.DrawPicture(picture);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, DrawPictureWithText) {
Canvas subcanvas;
ASSERT_TRUE(RenderTextInCanvasSkia(
GetContext(), subcanvas,
"the quick brown fox jumped over the lazy dog!.?", "Roboto-Regular.ttf"));
subcanvas.Translate({0, 10});
subcanvas.Scale(Vector2(3, 3));
ASSERT_TRUE(RenderTextInCanvasSkia(
GetContext(), subcanvas,
"the quick brown fox jumped over the very big lazy dog!.?",
"Roboto-Regular.ttf"));
auto picture = subcanvas.EndRecordingAsPicture();
Canvas canvas;
canvas.Scale(Vector2(.2, .2));
canvas.Save();
canvas.Translate({200, 200});
canvas.Scale(Vector2(3.5, 3.5)); // The text must not be blurry after this.
canvas.DrawPicture(picture);
canvas.Restore();
canvas.Scale(Vector2(1.5, 1.5));
ASSERT_TRUE(RenderTextInCanvasSkia(
GetContext(), canvas,
"the quick brown fox jumped over the smaller lazy dog!.?",
"Roboto-Regular.ttf"));
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, DrawPictureClipped) {
Canvas subcanvas;
subcanvas.ClipRRect(Rect::MakeLTRB(100, 100, 400, 400), 15);
subcanvas.DrawPaint({.color = Color::Red()});
auto picture = subcanvas.EndRecordingAsPicture();
Canvas canvas;
canvas.DrawPaint({.color = Color::CornflowerBlue()});
// Draw a red RRect via DrawPicture.
canvas.DrawPicture(picture);
// Draw over the picture with a larger green rectangle, completely covering it
// up.
canvas.ClipRRect(Rect::MakeLTRB(100, 100, 400, 400).Expand(20), 15);
canvas.DrawPaint({.color = Color::Green()});
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, MatrixSaveLayerFilter) {
Canvas canvas;
canvas.DrawPaint({.color = Color::Black()});
canvas.SaveLayer({}, std::nullopt);
{
canvas.DrawCircle(Point(200, 200), 100,
{.color = Color::Green().WithAlpha(0.5),
.blend_mode = BlendMode::kPlus});
// Should render a second circle, centered on the bottom-right-most edge of
// the circle.
canvas.SaveLayer({.image_filter =
[](const FilterInput::Ref& input,
const Matrix& effect_transform, bool is_subpass) {
Matrix matrix =
Matrix::MakeTranslation(
Vector2(1, 1) * (100 + 100 * k1OverSqrt2)) *
Matrix::MakeScale(Vector2(1, 1) * 0.2) *
Matrix::MakeTranslation(Vector2(-100, -100));
return FilterContents::MakeMatrixFilter(
input, matrix, {}, Matrix(), true);
}},
std::nullopt);
canvas.DrawCircle(Point(200, 200), 100,
{.color = Color::Green().WithAlpha(0.5),
.blend_mode = BlendMode::kPlus});
canvas.Restore();
}
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, MatrixBackdropFilter) {
Canvas canvas;
canvas.DrawPaint({.color = Color::Black()});
canvas.SaveLayer({}, std::nullopt);
{
canvas.DrawCircle(Point(200, 200), 100,
{.color = Color::Green().WithAlpha(0.5),
.blend_mode = BlendMode::kPlus});
// Should render a second circle, centered on the bottom-right-most edge of
// the circle.
canvas.SaveLayer({}, std::nullopt,
[](const FilterInput::Ref& input,
const Matrix& effect_transform, bool is_subpass) {
Matrix matrix =
Matrix::MakeTranslation(Vector2(1, 1) *
(100 + 100 * k1OverSqrt2)) *
Matrix::MakeScale(Vector2(1, 1) * 0.2) *
Matrix::MakeTranslation(Vector2(-100, -100));
return FilterContents::MakeMatrixFilter(
input, matrix, {}, Matrix(), true);
});
canvas.Restore();
}
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, SolidColorApplyColorFilter) {
auto contents = SolidColorContents();
contents.SetColor(Color::CornflowerBlue().WithAlpha(0.75));
auto result = contents.ApplyColorFilter([](const Color& color) {
return color.Blend(Color::LimeGreen().WithAlpha(0.75), BlendMode::kScreen);
});
ASSERT_TRUE(result);
ASSERT_COLOR_NEAR(contents.GetColor(),
Color(0.433247, 0.879523, 0.825324, 0.75));
}
#define APPLY_COLOR_FILTER_GRADIENT_TEST(name) \
TEST_P(AiksTest, name##GradientApplyColorFilter) { \
auto contents = name##GradientContents(); \
contents.SetColors({Color::CornflowerBlue().WithAlpha(0.75)}); \
auto result = contents.ApplyColorFilter([](const Color& color) { \
return color.Blend(Color::LimeGreen().WithAlpha(0.75), \
BlendMode::kScreen); \
}); \
ASSERT_TRUE(result); \
\
std::vector<Color> expected = {Color(0.433247, 0.879523, 0.825324, 0.75)}; \
ASSERT_COLORS_NEAR(contents.GetColors(), expected); \
}
APPLY_COLOR_FILTER_GRADIENT_TEST(Linear);
APPLY_COLOR_FILTER_GRADIENT_TEST(Radial);
APPLY_COLOR_FILTER_GRADIENT_TEST(Conical);
APPLY_COLOR_FILTER_GRADIENT_TEST(Sweep);
TEST_P(AiksTest, DrawScaledTextWithPerspectiveNoSaveLayer) {
Canvas canvas;
// clang-format off
canvas.Transform(Matrix(
2.000000, 0.000000, 0.000000, 0.000000,
1.445767, 2.637070, -0.507928, 0.001524,
-2.451887, -0.534662, 0.861399, -0.002584,
1063.481934, 1025.951416, -48.300270, 1.144901
));
// clang-format on
ASSERT_TRUE(RenderTextInCanvasSkia(GetContext(), canvas, "Hello world",
"Roboto-Regular.ttf"));
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, DrawScaledTextWithPerspectiveSaveLayer) {
Canvas canvas;
Paint save_paint;
canvas.SaveLayer(save_paint);
// clang-format off
canvas.Transform(Matrix(
2.000000, 0.000000, 0.000000, 0.000000,
1.445767, 2.637070, -0.507928, 0.001524,
-2.451887, -0.534662, 0.861399, -0.002584,
1063.481934, 1025.951416, -48.300270, 1.144901
));
// clang-format on
ASSERT_TRUE(RenderTextInCanvasSkia(GetContext(), canvas, "Hello world",
"Roboto-Regular.ttf"));
}
TEST_P(AiksTest, PipelineBlendSingleParameter) {
Canvas canvas;
// Should render a green square in the middle of a blue circle.
canvas.SaveLayer({});
{
canvas.Translate(Point(100, 100));
canvas.DrawCircle(Point(200, 200), 200, {.color = Color::Blue()});
canvas.ClipRect(Rect(100, 100, 200, 200));
canvas.DrawCircle(
Point(200, 200), 200,
{.color = Color::Green(),
.blend_mode = BlendMode::kSourceOver,
.image_filter = [](const FilterInput::Ref& input,
const Matrix& effect_transform, bool is_subpass) {
return ColorFilterContents::MakeBlend(BlendMode::kSource, {input});
}});
canvas.Restore();
}
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, ClippedBlurFilterRendersCorrectlyInteractive) {
auto callback = [&](AiksContext& renderer) -> std::optional<Picture> {
auto point = IMPELLER_PLAYGROUND_POINT(Point(400, 400), 20, Color::Green());
Canvas canvas;
canvas.Translate(point - Point(400, 400));
Paint paint;
paint.mask_blur_descriptor = Paint::MaskBlurDescriptor{
.style = FilterContents::BlurStyle::kNormal,
.sigma = Radius{120 * 3},
};
paint.color = Color::Red();
PathBuilder builder{};
builder.AddRect(Rect::MakeLTRB(0, 0, 800, 800));
canvas.DrawPath(builder.TakePath(), paint);
return canvas.EndRecordingAsPicture();
};
ASSERT_TRUE(OpenPlaygroundHere(callback));
}
TEST_P(AiksTest, ClippedBlurFilterRendersCorrectly) {
Canvas canvas;
canvas.Translate(Point(0, -400));
Paint paint;
paint.mask_blur_descriptor = Paint::MaskBlurDescriptor{
.style = FilterContents::BlurStyle::kNormal,
.sigma = Radius{120 * 3},
};
paint.color = Color::Red();
PathBuilder builder{};
builder.AddRect(Rect::MakeLTRB(0, 0, 800, 800));
canvas.DrawPath(builder.TakePath(), paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CaptureContext) {
auto capture_context = CaptureContext::MakeAllowlist({"TestDocument"});
auto callback = [&](AiksContext& renderer) -> std::optional<Picture> {
Canvas canvas;
capture_context.Rewind();
auto document = capture_context.GetDocument("TestDocument");
auto color = document.AddColor("Background color", Color::CornflowerBlue());
canvas.DrawPaint({.color = color});
ImGui::Begin("TestDocument", nullptr, ImGuiWindowFlags_AlwaysAutoResize);
document.GetElement()->properties.Iterate([](CaptureProperty& property) {
property.Invoke({.color = [](CaptureColorProperty& p) {
ImGui::ColorEdit4(p.label.c_str(), reinterpret_cast<float*>(&p.value));
}});
});
ImGui::End();
return canvas.EndRecordingAsPicture();
};
OpenPlaygroundHere(callback);
}
TEST_P(AiksTest, CaptureInactivatedByDefault) {
ASSERT_FALSE(GetContext()->capture.IsActive());
}
} // namespace testing
} // namespace impeller