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flutter / mirrors / engine / a0ac66ecaa2bc913dcaf65f1c130c3f4e181cd36 / . / 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 "flutter/impeller/aiks/aiks_unittests.h"
#include <algorithm>
#include <array>
#include <cmath>
#include <cstdlib>
#include <memory>
#include <tuple>
#include <utility>
#include <vector>
#include "flutter/testing/testing.h"
#include "impeller/aiks/canvas.h"
#include "impeller/aiks/color_filter.h"
#include "impeller/aiks/image.h"
#include "impeller/aiks/image_filter.h"
#include "impeller/aiks/paint_pass_delegate.h"
#include "impeller/aiks/testing/context_spy.h"
#include "impeller/core/capture.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/radial_gradient_contents.h"
#include "impeller/entity/contents/solid_color_contents.h"
#include "impeller/entity/contents/sweep_gradient_contents.h"
#include "impeller/entity/render_target_cache.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.h"
#include "impeller/geometry/path_builder.h"
#include "impeller/playground/widgets.h"
#include "impeller/renderer/command_buffer.h"
#include "impeller/renderer/snapshot.h"
#include "impeller/renderer/testing/mocks.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/SkFontMgr.h"
#include "third_party/skia/include/core/SkTypeface.h"
#include "txt/platform.h"
namespace impeller {
namespace testing {
INSTANTIATE_PLAYGROUND_SUITE(AiksTest);
TEST_P(AiksTest, CanvasCTMCanBeUpdated) {
Canvas canvas;
Matrix identity;
ASSERT_MATRIX_NEAR(canvas.GetCurrentTransform(), identity);
canvas.Translate(Size{100, 100});
ASSERT_MATRIX_NEAR(canvas.GetCurrentTransform(),
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.GetCurrentTransform(),
Matrix::MakeTranslation({100.0, 100.0, 0.0}));
ASSERT_TRUE(canvas.Restore());
ASSERT_EQ(canvas.GetSaveCount(), 1u);
ASSERT_MATRIX_NEAR(canvas.GetCurrentTransform(),
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, CanRenderInvertedImageWithColorFilter) {
Canvas canvas;
Paint paint;
auto image = std::make_shared<Image>(CreateTextureForFixture("kalimba.jpg"));
paint.color = Color::Red();
paint.color_filter =
ColorFilter::MakeBlend(BlendMode::kSourceOver, Color::Yellow());
paint.invert_colors = true;
canvas.DrawImage(image, Point::MakeXY(100.0, 100.0), paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderColorFilterWithInvertColors) {
Canvas canvas;
Paint paint;
paint.color = Color::Red();
paint.color_filter =
ColorFilter::MakeBlend(BlendMode::kSourceOver, Color::Yellow());
paint.invert_colors = true;
canvas.DrawRect(Rect::MakeLTRB(0, 0, 100, 100), paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderColorFilterWithInvertColorsDrawPaint) {
Canvas canvas;
Paint paint;
paint.color = Color::Red();
paint.color_filter =
ColorFilter::MakeBlend(BlendMode::kSourceOver, Color::Yellow());
paint.invert_colors = true;
canvas.DrawPaint(paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
namespace {
bool GenerateMipmap(const std::shared_ptr<Context>& context,
std::shared_ptr<Texture> texture,
std::string label,
bool async_submit) {
auto buffer = context->CreateCommandBuffer();
if (!buffer) {
return false;
}
auto pass = buffer->CreateBlitPass();
if (!pass) {
return false;
}
pass->GenerateMipmap(std::move(texture), std::move(label));
if (async_submit) {
return buffer->EncodeAndSubmit(pass, context->GetResourceAllocator());
}
pass->EncodeCommands(context->GetResourceAllocator());
return buffer->SubmitCommands();
}
void CanRenderTiledTexture(AiksTest* aiks_test,
Entity::TileMode tile_mode,
bool async_submit = false,
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", async_submit);
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(Rect::MakeXYWH(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(Rect::MakeXYWH(stroke_width, stroke_width, 600, 600),
paint);
} else {
canvas.DrawRect(Rect::MakeXYWH(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);
}
{
// Should not change the image. Tests the Convex short-cut code.
PathBuilder path_builder;
path_builder.AddCircle({150, 450}, 150);
path_builder.SetConvexity(Convexity::kConvex);
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, CanRenderTiledTextureClampAsync) {
CanRenderTiledTexture(this, Entity::TileMode::kClamp, /*async_submit=*/true);
}
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, /*async_submit=*/false,
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"));
Size image_half_size = Size(image->GetSize()) * 0.5;
// Render the bottom right quarter of the source image in a stretched rect.
auto source_rect = Rect::MakeSize(image_half_size);
source_rect = source_rect.Shift(Point(image_half_size));
canvas.DrawImageRect(image, source_rect, Rect::MakeXYWH(100, 100, 600, 600),
paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderSimpleClips) {
Canvas canvas;
canvas.Scale(GetContentScale());
Paint paint;
paint.color = Color::White();
canvas.DrawPaint(paint);
auto draw = [&canvas](const Paint& paint, Scalar x, Scalar y) {
canvas.Save();
canvas.Translate({x, y});
{
canvas.Save();
canvas.ClipRect(Rect::MakeLTRB(50, 50, 150, 150));
canvas.DrawPaint(paint);
canvas.Restore();
}
{
canvas.Save();
canvas.ClipOval(Rect::MakeLTRB(200, 50, 300, 150));
canvas.DrawPaint(paint);
canvas.Restore();
}
{
canvas.Save();
canvas.ClipRRect(Rect::MakeLTRB(50, 200, 150, 300), {20, 20});
canvas.DrawPaint(paint);
canvas.Restore();
}
{
canvas.Save();
canvas.ClipRRect(Rect::MakeLTRB(200, 230, 300, 270), {20, 20});
canvas.DrawPaint(paint);
canvas.Restore();
}
{
canvas.Save();
canvas.ClipRRect(Rect::MakeLTRB(230, 200, 270, 300), {20, 20});
canvas.DrawPaint(paint);
canvas.Restore();
}
canvas.Restore();
};
paint.color = Color::Blue();
draw(paint, 0, 0);
std::vector<Color> gradient_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,
};
auto texture = CreateTextureForFixture("airplane.jpg",
/*enable_mipmapping=*/true);
paint.color_source = ColorSource::MakeRadialGradient(
{500, 600}, 75, std::move(gradient_colors), std::move(stops),
Entity::TileMode::kMirror, {});
draw(paint, 0, 300);
paint.color_source = ColorSource::MakeImage(
texture, Entity::TileMode::kRepeat, Entity::TileMode::kRepeat, {},
Matrix::MakeTranslation({0, 0}));
draw(paint, 300, 0);
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::MakeXYWH(-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()));
}
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(Rect::MakeXYWH(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(Rect::MakeXYWH(100.0, 100.0, 600, 600), paint);
paint.color = Color{0.1294, 0.5882, 0.9529, 1.0};
recorder_canvas.DrawRect(Rect::MakeXYWH(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(Rect::MakeXYWH(100, 100, 400, 400), paint);
paint.blend_mode = BlendMode::kSource;
canvas.SaveLayer(paint);
paint.color = Color::Blue();
canvas.DrawRect(Rect::MakeXYWH(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(Rect::MakeXYWH(000, 000, 100, 100), red);
canvas.DrawRect(Rect::MakeXYWH(020, 020, 100, 100), green);
canvas.DrawRect(Rect::MakeXYWH(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(Rect::MakeXYWH(000, 000, 100, 100), red);
canvas.DrawRect(Rect::MakeXYWH(020, 020, 100, 100), green);
canvas.DrawRect(Rect::MakeXYWH(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::MakeXYWH(0, 0, 50, 50));
canvas.DrawRect(Rect::MakeXYWH(0, 0, 100, 100), red);
canvas.DrawRect(Rect::MakeXYWH(10, 10, 100, 100), green);
canvas.DrawRect(Rect::MakeXYWH(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::MakeXYWH(0, 0, 100000, 100000));
canvas.DrawRect(Rect::MakeXYWH(0, 0, 100, 100), red);
canvas.DrawRect(Rect::MakeXYWH(10, 10, 100, 100), green);
canvas.DrawRect(Rect::MakeXYWH(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::MakeXYWH(100, 100, 500, 500), radii)
.TakePath();
canvas.DrawPath(std::move(path), paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
struct TextRenderOptions {
Scalar font_size = 50;
Color color = Color::Yellow();
Point position = Vector2(100, 200);
std::optional<Paint::MaskBlurDescriptor> mask_blur_descriptor;
};
bool RenderTextInCanvasSkia(const std::shared_ptr<Context>& context,
Canvas& canvas,
const std::string& text,
const std::string_view& font_fixture,
TextRenderOptions options = {}) {
// Draw the baseline.
canvas.DrawRect(
Rect::MakeXYWH(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 c_font_fixture = std::string(font_fixture);
auto mapping = flutter::testing::OpenFixtureAsSkData(c_font_fixture.c_str());
if (!mapping) {
return false;
}
sk_sp<SkFontMgr> font_mgr = txt::GetDefaultFontManager();
SkFont sk_font(font_mgr->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 frame = MakeTextFrameFromTextBlobSkia(blob);
Paint text_paint;
text_paint.color = options.color;
text_paint.mask_blur_descriptor = options.mask_blur_descriptor;
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(
Rect::MakeXYWH(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 = options.color;
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()));
}
static constexpr std::string_view kFontFixture =
#if FML_OS_MACOSX
"Apple Color Emoji.ttc";
#else
"NotoColorEmoji.ttf";
#endif
TEST_P(AiksTest, CanRenderEmojiTextFrame) {
Canvas canvas;
canvas.DrawPaint({.color = Color(0.1, 0.1, 0.1, 1.0)});
ASSERT_TRUE(RenderTextInCanvasSkia(
GetContext(), canvas, "😀 😃 😄 😁 😆 😅 😂 🤣 🥲 😊", kFontFixture));
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanRenderEmojiTextFrameWithBlur) {
Canvas canvas;
canvas.DrawPaint({.color = Color(0.1, 0.1, 0.1, 1.0)});
ASSERT_TRUE(RenderTextInCanvasSkia(
GetContext(), canvas, "😀 😃 😄 😁 😆 😅 😂 🤣 🥲 😊", kFontFixture,
TextRenderOptions{.color = Color::Blue(),
.mask_blur_descriptor = Paint::MaskBlurDescriptor{
.style = FilterContents::BlurStyle::kNormal,
.sigma = Sigma(4)}}));
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, "😀 😃 😄 😁 😆 😅 😂 🤣 🥲 😊", kFontFixture,
{.color = Color::Black().WithAlpha(0.5)}));
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 = flutter::testing::OpenFixtureAsSkData("wtf.otf");
ASSERT_NE(mapping, nullptr);
Scalar font_size = 80;
sk_sp<SkFontMgr> font_mgr = txt::GetDefaultFontManager();
SkFont sk_font(font_mgr->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);
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()));
}
TEST_P(AiksTest, DrawPaintWithAdvancedBlendOverFilter) {
Paint filtered = {
.color = Color::Black(),
.mask_blur_descriptor =
Paint::MaskBlurDescriptor{
.style = FilterContents::BlurStyle::kNormal,
.sigma = Sigma(60),
},
};
Canvas canvas;
canvas.DrawPaint({.color = Color::White()});
canvas.DrawCircle({300, 300}, 200, filtered);
canvas.DrawPaint({.color = Color::Green(), .blend_mode = BlendMode::kScreen});
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, DrawAdvancedBlendPartlyOffscreen) {
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 paint = {
.color_source = ColorSource::MakeLinearGradient(
{0, 0}, {100, 100}, std::move(colors), std::move(stops),
Entity::TileMode::kRepeat, Matrix::MakeScale(Vector3(0.3, 0.3, 0.3))),
.blend_mode = BlendMode::kLighten,
};
Canvas canvas;
canvas.DrawPaint({.color = Color::Blue()});
canvas.Scale(Vector2(2, 2));
canvas.ClipRect(Rect::MakeLTRB(0, 0, 200, 200));
canvas.DrawCircle({100, 100}, 100, paint);
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.GetCurrentTransform(), Matrix());
// clang-format off
canvas.Translate(Vector3(100, 200));
ASSERT_MATRIX_NEAR(
canvas.GetCurrentTransform(),
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.GetCurrentTransform(),
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.GetCurrentTransform(),
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.GetCurrentTransform(),
Matrix( 0, 2, 0, 0,
-3, 0, 0, 0,
0, 0, 0, 0,
-500, 400, 0, 1));
// clang-format on
}
TEST_P(AiksTest, FilledCirclesRenderCorrectly) {
Canvas canvas;
canvas.Scale(GetContentScale());
Paint paint;
const int color_count = 3;
Color colors[color_count] = {
Color::Blue(),
Color::Green(),
Color::Crimson(),
};
paint.color = Color::White();
canvas.DrawPaint(paint);
int c_index = 0;
int radius = 600;
while (radius > 0) {
paint.color = colors[(c_index++) % color_count];
canvas.DrawCircle({10, 10}, radius, paint);
if (radius > 30) {
radius -= 10;
} else {
radius -= 2;
}
}
std::vector<Color> gradient_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,
};
auto texture = CreateTextureForFixture("airplane.jpg",
/*enable_mipmapping=*/true);
paint.color_source = ColorSource::MakeRadialGradient(
{500, 600}, 75, std::move(gradient_colors), std::move(stops),
Entity::TileMode::kMirror, {});
canvas.DrawCircle({500, 600}, 100, paint);
paint.color_source = ColorSource::MakeImage(
texture, Entity::TileMode::kRepeat, Entity::TileMode::kRepeat, {},
Matrix::MakeTranslation({700, 200}));
canvas.DrawCircle({800, 300}, 100, paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, StrokedCirclesRenderCorrectly) {
Canvas canvas;
canvas.Scale(GetContentScale());
Paint paint;
const int color_count = 3;
Color colors[color_count] = {
Color::Blue(),
Color::Green(),
Color::Crimson(),
};
paint.color = Color::White();
canvas.DrawPaint(paint);
int c_index = 0;
auto draw = [&paint, &colors, &c_index](Canvas& canvas, Point center,
Scalar r, Scalar dr, int n) {
for (int i = 0; i < n; i++) {
paint.color = colors[(c_index++) % color_count];
canvas.DrawCircle(center, r, paint);
r += dr;
}
};
paint.style = Paint::Style::kStroke;
paint.stroke_width = 1;
draw(canvas, {10, 10}, 2, 2, 14); // r = [2, 28], covers [1,29]
paint.stroke_width = 5;
draw(canvas, {10, 10}, 35, 10, 56); // r = [35, 585], covers [30,590]
std::vector<Color> gradient_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,
};
auto texture = CreateTextureForFixture("airplane.jpg",
/*enable_mipmapping=*/true);
paint.color_source = ColorSource::MakeRadialGradient(
{500, 600}, 75, std::move(gradient_colors), std::move(stops),
Entity::TileMode::kMirror, {});
draw(canvas, {500, 600}, 5, 10, 10);
paint.color_source = ColorSource::MakeImage(
texture, Entity::TileMode::kRepeat, Entity::TileMode::kRepeat, {},
Matrix::MakeTranslation({700, 200}));
draw(canvas, {800, 300}, 5, 10, 10);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, FilledEllipsesRenderCorrectly) {
Canvas canvas;
canvas.Scale(GetContentScale());
Paint paint;
const int color_count = 3;
Color colors[color_count] = {
Color::Blue(),
Color::Green(),
Color::Crimson(),
};
paint.color = Color::White();
canvas.DrawPaint(paint);
int c_index = 0;
int long_radius = 600;
int short_radius = 600;
while (long_radius > 0 && short_radius > 0) {
paint.color = colors[(c_index++) % color_count];
canvas.DrawOval(Rect::MakeXYWH(10 - long_radius, 10 - short_radius,
long_radius * 2, short_radius * 2),
paint);
canvas.DrawOval(Rect::MakeXYWH(1000 - short_radius, 750 - long_radius,
short_radius * 2, long_radius * 2),
paint);
if (short_radius > 30) {
short_radius -= 10;
long_radius -= 5;
} else {
short_radius -= 2;
long_radius -= 1;
}
}
std::vector<Color> gradient_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,
};
auto texture = CreateTextureForFixture("airplane.jpg",
/*enable_mipmapping=*/true);
paint.color = Color::White().WithAlpha(0.5);
paint.color_source = ColorSource::MakeRadialGradient(
{300, 650}, 75, std::move(gradient_colors), std::move(stops),
Entity::TileMode::kMirror, {});
canvas.DrawOval(Rect::MakeXYWH(200, 625, 200, 50), paint);
canvas.DrawOval(Rect::MakeXYWH(275, 550, 50, 200), paint);
paint.color_source = ColorSource::MakeImage(
texture, Entity::TileMode::kRepeat, Entity::TileMode::kRepeat, {},
Matrix::MakeTranslation({610, 15}));
canvas.DrawOval(Rect::MakeXYWH(610, 90, 200, 50), paint);
canvas.DrawOval(Rect::MakeXYWH(685, 15, 50, 200), paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, FilledRoundRectsRenderCorrectly) {
Canvas canvas;
canvas.Scale(GetContentScale());
Paint paint;
const int color_count = 3;
Color colors[color_count] = {
Color::Blue(),
Color::Green(),
Color::Crimson(),
};
paint.color = Color::White();
canvas.DrawPaint(paint);
int c_index = 0;
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 4; j++) {
paint.color = colors[(c_index++) % color_count];
canvas.DrawRRect(Rect::MakeXYWH(i * 100 + 10, j * 100 + 20, 80, 80),
Size(i * 5 + 10, j * 5 + 10), paint);
}
}
paint.color = colors[(c_index++) % color_count];
canvas.DrawRRect(Rect::MakeXYWH(10, 420, 380, 80), Size(40, 40), paint);
paint.color = colors[(c_index++) % color_count];
canvas.DrawRRect(Rect::MakeXYWH(410, 20, 80, 380), Size(40, 40), paint);
std::vector<Color> gradient_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,
};
auto texture = CreateTextureForFixture("airplane.jpg",
/*enable_mipmapping=*/true);
paint.color = Color::White().WithAlpha(0.1);
paint.color_source = ColorSource::MakeRadialGradient(
{550, 550}, 75, gradient_colors, stops, Entity::TileMode::kMirror, {});
for (int i = 1; i <= 10; i++) {
int j = 11 - i;
canvas.DrawRRect(Rect::MakeLTRB(550 - i * 20, 550 - j * 20, //
550 + i * 20, 550 + j * 20),
Size(i * 10, j * 10), paint);
}
paint.color = Color::White().WithAlpha(0.5);
paint.color_source = ColorSource::MakeRadialGradient(
{200, 650}, 75, std::move(gradient_colors), std::move(stops),
Entity::TileMode::kMirror, {});
canvas.DrawRRect(Rect::MakeLTRB(100, 610, 300, 690), Size(40, 40), paint);
canvas.DrawRRect(Rect::MakeLTRB(160, 550, 240, 750), Size(40, 40), paint);
paint.color = Color::White().WithAlpha(0.1);
paint.color_source = ColorSource::MakeImage(
texture, Entity::TileMode::kRepeat, Entity::TileMode::kRepeat, {},
Matrix::MakeTranslation({520, 20}));
for (int i = 1; i <= 10; i++) {
int j = 11 - i;
canvas.DrawRRect(Rect::MakeLTRB(720 - i * 20, 220 - j * 20, //
720 + i * 20, 220 + j * 20),
Size(i * 10, j * 10), paint);
}
paint.color = Color::White().WithAlpha(0.5);
paint.color_source = ColorSource::MakeImage(
texture, Entity::TileMode::kRepeat, Entity::TileMode::kRepeat, {},
Matrix::MakeTranslation({800, 300}));
canvas.DrawRRect(Rect::MakeLTRB(800, 410, 1000, 490), Size(40, 40), paint);
canvas.DrawRRect(Rect::MakeLTRB(860, 350, 940, 550), Size(40, 40), paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, FilledRoundRectPathsRenderCorrectly) {
Canvas canvas;
canvas.Scale(GetContentScale());
Paint paint;
const int color_count = 3;
Color colors[color_count] = {
Color::Blue(),
Color::Green(),
Color::Crimson(),
};
paint.color = Color::White();
canvas.DrawPaint(paint);
auto draw_rrect_as_path = [&canvas](const Rect& rect, const Size& radii,
const Paint& paint) {
PathBuilder builder = PathBuilder();
builder.AddRoundedRect(rect, radii);
canvas.DrawPath(builder.TakePath(), paint);
};
int c_index = 0;
for (int i = 0; i < 4; i++) {
for (int j = 0; j < 4; j++) {
paint.color = colors[(c_index++) % color_count];
draw_rrect_as_path(Rect::MakeXYWH(i * 100 + 10, j * 100 + 20, 80, 80),
Size(i * 5 + 10, j * 5 + 10), paint);
}
}
paint.color = colors[(c_index++) % color_count];
draw_rrect_as_path(Rect::MakeXYWH(10, 420, 380, 80), Size(40, 40), paint);
paint.color = colors[(c_index++) % color_count];
draw_rrect_as_path(Rect::MakeXYWH(410, 20, 80, 380), Size(40, 40), paint);
std::vector<Color> gradient_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,
};
auto texture = CreateTextureForFixture("airplane.jpg",
/*enable_mipmapping=*/true);
paint.color = Color::White().WithAlpha(0.1);
paint.color_source = ColorSource::MakeRadialGradient(
{550, 550}, 75, gradient_colors, stops, Entity::TileMode::kMirror, {});
for (int i = 1; i <= 10; i++) {
int j = 11 - i;
draw_rrect_as_path(Rect::MakeLTRB(550 - i * 20, 550 - j * 20, //
550 + i * 20, 550 + j * 20),
Size(i * 10, j * 10), paint);
}
paint.color = Color::White().WithAlpha(0.5);
paint.color_source = ColorSource::MakeRadialGradient(
{200, 650}, 75, std::move(gradient_colors), std::move(stops),
Entity::TileMode::kMirror, {});
draw_rrect_as_path(Rect::MakeLTRB(100, 610, 300, 690), Size(40, 40), paint);
draw_rrect_as_path(Rect::MakeLTRB(160, 550, 240, 750), Size(40, 40), paint);
paint.color = Color::White().WithAlpha(0.1);
paint.color_source = ColorSource::MakeImage(
texture, Entity::TileMode::kRepeat, Entity::TileMode::kRepeat, {},
Matrix::MakeTranslation({520, 20}));
for (int i = 1; i <= 10; i++) {
int j = 11 - i;
draw_rrect_as_path(Rect::MakeLTRB(720 - i * 20, 220 - j * 20, //
720 + i * 20, 220 + j * 20),
Size(i * 10, j * 10), paint);
}
paint.color = Color::White().WithAlpha(0.5);
paint.color_source = ColorSource::MakeImage(
texture, Entity::TileMode::kRepeat, Entity::TileMode::kRepeat, {},
Matrix::MakeTranslation({800, 300}));
draw_rrect_as_path(Rect::MakeLTRB(800, 410, 1000, 490), Size(40, 40), paint);
draw_rrect_as_path(Rect::MakeLTRB(860, 350, 940, 550), Size(40, 40), paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
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(Rect::MakeOriginSize(current, size),
Paint{.color = Color::Red()});
canvas.DrawRect(Rect::MakeOriginSize(current += offset, size),
Paint{.color = Color::Green()});
canvas.DrawRect(Rect::MakeOriginSize(current += offset, size),
Paint{.color = Color::Blue()});
canvas.Restore();
return canvas.EndRecordingAsPicture();
};
ASSERT_TRUE(OpenPlaygroundHere(callback));
}
TEST_P(AiksTest, SaveLayerDrawsBehindSubsequentEntities) {
// Compare with https://fiddle.skia.org/c/9e03de8567ffb49e7e83f53b64bcf636
Canvas canvas;
Paint paint;
paint.color = Color::Black();
Rect rect = Rect::MakeXYWH(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 = Rect::MakeXYWH(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.
// TODO(jonahwilliams): this blend mode was changed from color burn to
// hardlight to work around https://github.com/flutter/flutter/issues/136554
// .
canvas.DrawRect(
Rect::MakeSize(Size{400, 400}),
{.color = Color::Green(), .blend_mode = BlendMode::kHardLight});
}
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 = ImageFilter::MakeBlur(Sigma(1.0), Sigma(1.0),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kClamp);
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 = ImageFilter::MakeBlur(Sigma(1.0), Sigma(1.0),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kClamp);
// 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(std::move(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);
}
// This is important to enforce with texture reuse, since cached textures need
// to be cleared before reuse.
TEST_P(AiksTest,
ParentSaveLayerCreatesRenderPassWhenChildBackdropFilterIsPresent) {
Canvas canvas;
canvas.SaveLayer({}, std::nullopt, ImageFilter::MakeMatrix(Matrix(), {}));
canvas.DrawPaint({.color = Color::Red(), .blend_mode = BlendMode::kSource});
canvas.DrawPaint({.color = Color::CornflowerBlue().WithAlpha(0.75),
.blend_mode = BlendMode::kSourceOver});
canvas.Restore();
Picture picture = canvas.EndRecordingAsPicture();
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(),
GetBackend() == PlaygroundBackend::kOpenGLES ? 4llu : 3llu);
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(Rect::MakeXYWH(0, 0, 300, 300),
{.color = Color::Red(), .blend_mode = BlendMode::kSource});
canvas.DrawRect(Rect::MakeXYWH(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(Rect::MakeXYWH(0, 0, 300, 300), {5.0, 5.0},
{.color = Color::Red(), .blend_mode = BlendMode::kSource});
canvas.DrawRRect(Rect::MakeXYWH(0, 0, 300, 300), {5.0, 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(Rect::MakeXYWH(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(Rect::MakeXYWH(0, 0, 300, 300),
{.color = Color::Red(), .blend_mode = BlendMode::kSource});
canvas.DrawRect(Rect::MakeXYWH(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::MakeXYWH(0, 0, 100, 100));
canvas.ClipRect(Rect::MakeXYWH(0, 0, 100, 100));
canvas.ClipRect(Rect::MakeXYWH(-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, ClearColorOptimizationDoesNotApplyForBackdropFilters) {
Canvas canvas;
canvas.SaveLayer({}, std::nullopt,
ImageFilter::MakeBlur(Sigma(3), Sigma(3),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kClamp));
canvas.DrawPaint({.color = Color::Red(), .blend_mode = BlendMode::kSource});
canvas.DrawPaint({.color = Color::CornflowerBlue().WithAlpha(0.75),
.blend_mode = BlendMode::kSourceOver});
canvas.Restore();
Picture picture = canvas.EndRecordingAsPicture();
std::optional<Color> actual_color;
bool found_subpass = false;
picture.pass->IterateAllElements([&](EntityPass::Element& element) -> bool {
if (auto subpass = std::get_if<std::unique_ptr<EntityPass>>(&element)) {
actual_color = subpass->get()->GetClearColor();
found_subpass = true;
}
// Fail if the first element isn't a subpass.
return true;
});
EXPECT_TRUE(found_subpass);
EXPECT_FALSE(actual_color.has_value());
}
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({}, {},
ImageFilter::MakeBlur(Sigma(20.0), Sigma(20.0),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kDecal));
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(Rect::MakeXYWH(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(Rect::MakeXYWH(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(Rect::MakeXYWH(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(Rect::MakeXYWH(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(Rect::MakeXYWH(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(Rect::MakeXYWH(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 = ImageFilter::MakeFromColorFilter(
*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, 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, ImageFilteredSaveLayerWithUnboundedContents) {
Canvas canvas;
canvas.Scale(GetContentScale());
auto test = [&canvas](const std::shared_ptr<ImageFilter>& filter) {
auto DrawLine = [&canvas](const Point& p0, const Point& p1,
const Paint& p) {
auto path = PathBuilder{}
.AddLine(p0, p1)
.SetConvexity(Convexity::kConvex)
.TakePath();
Paint paint = p;
paint.style = Paint::Style::kStroke;
canvas.DrawPath(std::move(path), paint);
};
// Registration marks for the edge of the SaveLayer
DrawLine(Point(75, 100), Point(225, 100), {.color = Color::White()});
DrawLine(Point(75, 200), Point(225, 200), {.color = Color::White()});
DrawLine(Point(100, 75), Point(100, 225), {.color = Color::White()});
DrawLine(Point(200, 75), Point(200, 225), {.color = Color::White()});
canvas.SaveLayer({.image_filter = filter},
Rect::MakeLTRB(100, 100, 200, 200));
{
// DrawPaint to verify correct behavior when the contents are unbounded.
canvas.DrawPaint({.color = Color::Yellow()});
// Contrasting rectangle to see interior blurring
canvas.DrawRect(Rect::MakeLTRB(125, 125, 175, 175),
{.color = Color::Blue()});
}
canvas.Restore();
};
test(ImageFilter::MakeBlur(Sigma{10.0}, Sigma{10.0},
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kDecal));
canvas.Translate({200.0, 0.0});
test(ImageFilter::MakeDilate(Radius{10.0}, Radius{10.0}));
canvas.Translate({200.0, 0.0});
test(ImageFilter::MakeErode(Radius{10.0}, Radius{10.0}));
canvas.Translate({-400.0, 200.0});
auto rotate_filter =
ImageFilter::MakeMatrix(Matrix::MakeTranslation({150, 150}) *
Matrix::MakeRotationZ(Degrees{10.0}) *
Matrix::MakeTranslation({-150, -150}),
SamplerDescriptor{});
test(rotate_filter);
canvas.Translate({200.0, 0.0});
auto rgb_swap_filter = ImageFilter::MakeFromColorFilter(
*ColorFilter::MakeMatrix({.array = {
0, 1, 0, 0, 0, //
0, 0, 1, 0, 0, //
1, 0, 0, 0, 0, //
0, 0, 0, 1, 0 //
}}));
test(rgb_swap_filter);
canvas.Translate({200.0, 0.0});
test(ImageFilter::MakeCompose(*rotate_filter, *rgb_swap_filter));
canvas.Translate({-400.0, 200.0});
test(ImageFilter::MakeLocalMatrix(Matrix::MakeTranslation({25.0, 25.0}),
*rotate_filter));
canvas.Translate({200.0, 0.0});
test(ImageFilter::MakeLocalMatrix(Matrix::MakeTranslation({25.0, 25.0}),
*rgb_swap_filter));
canvas.Translate({200.0, 0.0});
test(ImageFilter::MakeLocalMatrix(
Matrix::MakeTranslation({25.0, 25.0}),
*ImageFilter::MakeCompose(*rotate_filter, *rgb_swap_filter)));
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, ImageFilteredUnboundedSaveLayerWithUnboundedContents) {
Canvas canvas;
canvas.Scale(GetContentScale());
auto blur_filter = ImageFilter::MakeBlur(Sigma{10.0}, Sigma{10.0},
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kDecal);
canvas.SaveLayer({.image_filter = blur_filter}, std::nullopt);
{
// DrawPaint to verify correct behavior when the contents are unbounded.
canvas.DrawPaint({.color = Color::Yellow()});
// Contrasting rectangle to see interior blurring
canvas.DrawRect(Rect::MakeLTRB(125, 125, 175, 175),
{.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 = ImageFilter::MakeFromColorFilter(
*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,
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 = ImageFilter::MakeFromColorFilter(
*ColorFilter::MakeMatrix({.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(Rect::MakeXYWH(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::vector<Entity> entity;
std::shared_ptr<SolidColorContents> contents;
picture.pass->IterateAllEntities([e = &entity, &contents](Entity& entity) {
if (ScalarNearlyEqual(entity.GetTransform().GetScale().x, 1.618f)) {
contents =
std::static_pointer_cast<SolidColorContents>(entity.GetContents());
e->emplace_back(entity.Clone());
return false;
}
return true;
});
ASSERT_TRUE(entity.size() >= 1);
ASSERT_TRUE(contents->IsOpaque());
ASSERT_EQ(entity[0].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, 20});
canvas.SaveLayer({.blend_mode = BlendMode::kSource}, std::nullopt,
ImageFilter::MakeBlur(Sigma(20.0), Sigma(20.0),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kClamp));
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, 20});
canvas.SaveLayer({.blend_mode = BlendMode::kSource}, std::nullopt,
ImageFilter::MakeBlur(Sigma(30.0), Sigma(30.0),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kClamp));
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,
ImageFilter::MakeBlur(Sigma(999999), Sigma(999999),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kClamp));
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 = ImageFilter::MakeBlur(
Sigma(20.0), Sigma(20.0), FilterContents::BlurStyle::kNormal,
Entity::TileMode::kClamp),
});
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::Grey(),
.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) {
auto runtime_stages =
OpenAssetAsRuntimeStage("runtime_stage_example.frag.iplr");
auto runtime_stage =
runtime_stages[PlaygroundBackendToRuntimeStageBackend(GetBackend())];
ASSERT_TRUE(runtime_stage);
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::MakeXYWH(0, 0, 400, 400), {10.0, 10.0},
Entity::ClipOperation::kIntersect);
canvas.DrawRect(Rect::MakeXYWH(0, 0, 400, 400), paint);
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, DrawPaintTransformsBounds) {
auto runtime_stages = OpenAssetAsRuntimeStage("gradient.frag.iplr");
auto runtime_stage = runtime_stages[RuntimeStageBackend::kMetal];
ASSERT_TRUE(runtime_stage);
ASSERT_TRUE(runtime_stage->IsDirty());
struct FragUniforms {
Size size;
} frag_uniforms = {.size = Size::MakeWH(400, 400)};
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.Scale(GetContentScale());
canvas.DrawPaint(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 = flutter::testing::OpenFixtureAsSkData("Roboto-Regular.ttf");
ASSERT_NE(mapping, nullptr);
Scalar font_size = 100;
sk_sp<SkFontMgr> font_mgr = txt::GetDefaultFontManager();
SkFont sk_font(font_mgr->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 frame = MakeTextFrameFromTextBlobSkia(blob);
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, CanCanvasDrawPictureWithAdvancedBlend) {
Canvas subcanvas;
subcanvas.DrawRect(
Rect::MakeLTRB(-100, -50, 100, 50),
{.color = Color::CornflowerBlue(), .blend_mode = BlendMode::kColorDodge});
auto picture = subcanvas.EndRecordingAsPicture();
Canvas canvas;
canvas.DrawPaint({.color = Color::Black()});
canvas.DrawCircle(Point::MakeXY(150, 150), 25, {.color = Color::Red()});
canvas.DrawPicture(picture);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, CanCanvasDrawPictureWithBackdropFilter) {
Canvas subcanvas;
subcanvas.SaveLayer({}, {},
ImageFilter::MakeBlur(Sigma(20.0), Sigma(20.0),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kDecal));
auto image = std::make_shared<Image>(CreateTextureForFixture("kalimba.jpg"));
Paint paint;
paint.color = Color::Red().WithAlpha(0.5);
subcanvas.DrawImage(image, Point::MakeXY(100.0, 100.0), paint);
auto picture = subcanvas.EndRecordingAsPicture();
Canvas canvas;
canvas.DrawPaint({.color = Color::Black()});
canvas.DrawCircle(Point::MakeXY(150, 150), 25, {.color = Color::Red()});
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, 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, 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 = ImageFilter::MakeMatrix(
Matrix::MakeTranslation(Vector2(1, 1) *
(200 + 100 * k1OverSqrt2)) *
Matrix::MakeScale(Vector2(1, 1) * 0.5) *
Matrix::MakeTranslation(Vector2(-200, -200)),
SamplerDescriptor{})},
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,
ImageFilter::MakeMatrix(
Matrix::MakeTranslation(Vector2(1, 1) * (100 + 100 * k1OverSqrt2)) *
Matrix::MakeScale(Vector2(1, 1) * 0.5) *
Matrix::MakeTranslation(Vector2(-100, -100)),
SamplerDescriptor{}));
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));
}
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::MakeXYWH(100, 100, 200, 200));
canvas.DrawCircle(Point(200, 200), 200,
{
.color = Color::Green(),
.blend_mode = BlendMode::kSourceOver,
.image_filter = ImageFilter::MakeFromColorFilter(
*ColorFilter::MakeBlend(BlendMode::kDestination,
Color::White())),
});
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());
}
// Regression test for https://github.com/flutter/flutter/issues/134678.
TEST_P(AiksTest, ReleasesTextureOnTeardown) {
auto context = GetContext();
std::weak_ptr<Texture> weak_texture;
{
auto texture = CreateTextureForFixture("table_mountain_nx.png");
Canvas canvas;
canvas.Scale(GetContentScale());
canvas.Translate({100.0f, 100.0f, 0});
Paint paint;
paint.color_source = ColorSource::MakeImage(
texture, Entity::TileMode::kClamp, Entity::TileMode::kClamp, {}, {});
canvas.DrawRect(Rect::MakeXYWH(0, 0, 600, 600), paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
// See https://github.com/flutter/flutter/issues/134751.
//
// If the fence waiter was working this may not be released by the end of the
// scope above. Adding a manual shutdown so that future changes to the fence
// waiter will not flake this test.
context->Shutdown();
// The texture should be released by now.
ASSERT_TRUE(weak_texture.expired()) << "When the texture is no longer in use "
"by the backend, it should be "
"released.";
}
// Regression test for https://github.com/flutter/flutter/issues/135441 .
TEST_P(AiksTest, VerticesGeometryUVPositionData) {
Canvas canvas;
Paint paint;
auto texture = CreateTextureForFixture("table_mountain_nx.png");
paint.color_source = ColorSource::MakeImage(texture, Entity::TileMode::kClamp,
Entity::TileMode::kClamp, {}, {});
auto vertices = {Point(0, 0), Point(texture->GetSize().width, 0),
Point(0, texture->GetSize().height)};
std::vector<uint16_t> indices = {0u, 1u, 2u};
std::vector<Point> texture_coordinates = {};
std::vector<Color> vertex_colors = {};
auto geometry = std::make_shared<VerticesGeometry>(
vertices, indices, texture_coordinates, vertex_colors,
Rect::MakeLTRB(0, 0, 1, 1), VerticesGeometry::VertexMode::kTriangleStrip);
canvas.DrawVertices(geometry, BlendMode::kSourceOver, paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
// Regression test for https://github.com/flutter/flutter/issues/135441 .
TEST_P(AiksTest, VerticesGeometryUVPositionDataWithTranslate) {
Canvas canvas;
Paint paint;
auto texture = CreateTextureForFixture("table_mountain_nx.png");
paint.color_source = ColorSource::MakeImage(
texture, Entity::TileMode::kClamp, Entity::TileMode::kClamp, {},
Matrix::MakeTranslation({100.0, 100.0}));
auto vertices = {Point(0, 0), Point(texture->GetSize().width, 0),
Point(0, texture->GetSize().height)};
std::vector<uint16_t> indices = {0u, 1u, 2u};
std::vector<Point> texture_coordinates = {};
std::vector<Color> vertex_colors = {};
auto geometry = std::make_shared<VerticesGeometry>(
vertices, indices, texture_coordinates, vertex_colors,
Rect::MakeLTRB(0, 0, 1, 1), VerticesGeometry::VertexMode::kTriangleStrip);
canvas.DrawVertices(geometry, BlendMode::kSourceOver, paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, ClearBlendWithBlur) {
Canvas canvas;
Paint white;
white.color = Color::Blue();
canvas.DrawRect(Rect::MakeXYWH(0, 0, 600.0, 600.0), white);
Paint clear;
clear.blend_mode = BlendMode::kClear;
clear.mask_blur_descriptor = Paint::MaskBlurDescriptor{
.style = FilterContents::BlurStyle::kNormal,
.sigma = Sigma(20),
};
canvas.DrawCircle(Point::MakeXY(300.0, 300.0), 200.0, clear);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, ClearBlend) {
Canvas canvas;
Paint white;
white.color = Color::Blue();
canvas.DrawRect(Rect::MakeXYWH(0, 0, 600.0, 600.0), white);
Paint clear;
clear.blend_mode = BlendMode::kClear;
canvas.DrawCircle(Point::MakeXY(300.0, 300.0), 200.0, clear);
}
TEST_P(AiksTest, MatrixImageFilterMagnify) {
Canvas canvas;
canvas.Scale(GetContentScale());
auto image = std::make_shared<Image>(CreateTextureForFixture("airplane.jpg"));
canvas.Translate({600, -200});
canvas.SaveLayer({
.image_filter = std::make_shared<MatrixImageFilter>(
Matrix::MakeScale({2, 2, 2}), SamplerDescriptor{}),
});
canvas.DrawImage(image, {0, 0},
Paint{.color = Color::White().WithAlpha(0.5)});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
// Render a white circle at the top left corner of the screen.
TEST_P(AiksTest, MatrixImageFilterDoesntCullWhenTranslatedFromOffscreen) {
Canvas canvas;
canvas.Scale(GetContentScale());
canvas.Translate({100, 100});
// Draw a circle in a SaveLayer at -300, but move it back on-screen with a
// +300 translation applied by a SaveLayer image filter.
canvas.SaveLayer({
.image_filter = std::make_shared<MatrixImageFilter>(
Matrix::MakeTranslation({300, 0}), SamplerDescriptor{}),
});
canvas.DrawCircle({-300, 0}, 100, {.color = Color::Green()});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
// Render a white circle at the top left corner of the screen.
TEST_P(AiksTest,
MatrixImageFilterDoesntCullWhenScaledAndTranslatedFromOffscreen) {
Canvas canvas;
canvas.Scale(GetContentScale());
canvas.Translate({100, 100});
// Draw a circle in a SaveLayer at -300, but move it back on-screen with a
// +300 translation applied by a SaveLayer image filter.
canvas.SaveLayer({
.image_filter = std::make_shared<MatrixImageFilter>(
Matrix::MakeTranslation({300, 0}) * Matrix::MakeScale({2, 2, 2}),
SamplerDescriptor{}),
});
canvas.DrawCircle({-150, 0}, 50, {.color = Color::Green()});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
// This should be solid red, if you see a little red box this is broken.
TEST_P(AiksTest, ClearColorOptimizationWhenSubpassIsBiggerThanParentPass) {
SetWindowSize({400, 400});
Canvas canvas;
canvas.Scale(GetContentScale());
canvas.DrawRect(Rect::MakeLTRB(200, 200, 300, 300), {.color = Color::Red()});
canvas.SaveLayer({
.image_filter = std::make_shared<MatrixImageFilter>(
Matrix::MakeScale({2, 2, 1}), SamplerDescriptor{}),
});
// Draw a rectangle that would fully cover the parent pass size, but not
// the subpass that it is rendered in.
canvas.DrawRect(Rect::MakeLTRB(0, 0, 400, 400), {.color = Color::Green()});
// Draw a bigger rectangle to force the subpass to be bigger.
canvas.DrawRect(Rect::MakeLTRB(0, 0, 800, 800), {.color = Color::Red()});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, BlurHasNoEdge) {
Canvas canvas;
canvas.Scale(GetContentScale());
canvas.DrawPaint({});
Paint blur = {
.color = Color::Green(),
.mask_blur_descriptor =
Paint::MaskBlurDescriptor{
.style = FilterContents::BlurStyle::kNormal,
.sigma = Sigma(47.6),
},
};
canvas.DrawRect(Rect::MakeXYWH(300, 300, 200, 200), blur);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, EmptySaveLayerIgnoresPaint) {
Canvas canvas;
canvas.Scale(GetContentScale());
canvas.DrawPaint(Paint{.color = Color::Red()});
canvas.ClipRect(Rect::MakeXYWH(100, 100, 200, 200));
canvas.SaveLayer(Paint{.color = Color::Blue()});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, EmptySaveLayerRendersWithClear) {
Canvas canvas;
canvas.Scale(GetContentScale());
auto image = std::make_shared<Image>(CreateTextureForFixture("airplane.jpg"));
canvas.DrawImage(image, {10, 10}, {});
canvas.ClipRect(Rect::MakeXYWH(100, 100, 200, 200));
canvas.SaveLayer(Paint{.blend_mode = BlendMode::kClear});
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, BlurredRectangleWithShader) {
Canvas canvas;
canvas.Scale(GetContentScale());
auto paint_lines = [&canvas](Scalar dx, Scalar dy, Paint paint) {
auto draw_line = [&canvas, &paint](Point a, Point b) {
canvas.DrawPath(PathBuilder{}.AddLine(a, b).TakePath(), paint);
};
paint.stroke_width = 5;
paint.style = Paint::Style::kStroke;
draw_line(Point(dx + 100, dy + 100), Point(dx + 200, dy + 200));
draw_line(Point(dx + 100, dy + 200), Point(dx + 200, dy + 100));
draw_line(Point(dx + 150, dy + 100), Point(dx + 200, dy + 150));
draw_line(Point(dx + 100, dy + 150), Point(dx + 150, dy + 200));
};
AiksContext renderer(GetContext(), nullptr);
Canvas recorder_canvas;
for (int x = 0; x < 5; ++x) {
for (int y = 0; y < 5; ++y) {
Rect rect = Rect::MakeXYWH(x * 20, y * 20, 20, 20);
Paint paint{.color =
((x + y) & 1) == 0 ? Color::Yellow() : Color::Blue()};
recorder_canvas.DrawRect(rect, paint);
}
}
Picture picture = recorder_canvas.EndRecordingAsPicture();
std::shared_ptr<Texture> texture =
picture.ToImage(renderer, ISize{100, 100})->GetTexture();
ColorSource image_source = ColorSource::MakeImage(
texture, Entity::TileMode::kRepeat, Entity::TileMode::kRepeat, {}, {});
std::shared_ptr<ImageFilter> blur_filter = ImageFilter::MakeBlur(
Sigma(5), Sigma(5), FilterContents::BlurStyle::kNormal,
Entity::TileMode::kDecal);
canvas.DrawRect(Rect::MakeLTRB(0, 0, 300, 600),
Paint{.color = Color::DarkGreen()});
canvas.DrawRect(Rect::MakeLTRB(100, 100, 200, 200),
Paint{.color_source = image_source});
canvas.DrawRect(Rect::MakeLTRB(300, 0, 600, 600),
Paint{.color = Color::Red()});
canvas.DrawRect(
Rect::MakeLTRB(400, 100, 500, 200),
Paint{.color_source = image_source, .image_filter = blur_filter});
paint_lines(0, 300, Paint{.color_source = image_source});
paint_lines(300, 300,
Paint{.color_source = image_source, .image_filter = blur_filter});
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, MaskBlurWithZeroSigmaIsSkipped) {
Canvas canvas;
Paint paint = {
.color = Color::Blue(),
.mask_blur_descriptor =
Paint::MaskBlurDescriptor{
.style = FilterContents::BlurStyle::kNormal,
.sigma = Sigma(0),
},
};
canvas.DrawCircle({300, 300}, 200, paint);
canvas.DrawRect(Rect::MakeLTRB(100, 300, 500, 600), paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, GaussianBlurAtPeripheryVertical) {
Canvas canvas;
canvas.Scale(GetContentScale());
canvas.DrawRRect(Rect::MakeLTRB(0, 0, GetWindowSize().width, 100),
Size(10, 10), Paint{.color = Color::LimeGreen()});
canvas.DrawRRect(Rect::MakeLTRB(0, 110, GetWindowSize().width, 210),
Size(10, 10), Paint{.color = Color::Magenta()});
canvas.ClipRect(Rect::MakeLTRB(100, 0, 200, GetWindowSize().height));
canvas.SaveLayer({.blend_mode = BlendMode::kSource}, std::nullopt,
ImageFilter::MakeBlur(Sigma(20.0), Sigma(20.0),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kClamp));
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, GaussianBlurAtPeripheryHorizontal) {
Canvas canvas;
canvas.Scale(GetContentScale());
std::shared_ptr<Texture> boston = CreateTextureForFixture("boston.jpg");
canvas.DrawImageRect(
std::make_shared<Image>(boston),
Rect::MakeXYWH(0, 0, boston->GetSize().width, boston->GetSize().height),
Rect::MakeLTRB(0, 0, GetWindowSize().width, 100), Paint{});
canvas.DrawRRect(Rect::MakeLTRB(0, 110, GetWindowSize().width, 210),
Size(10, 10), Paint{.color = Color::Magenta()});
canvas.ClipRect(Rect::MakeLTRB(0, 50, GetWindowSize().width, 150));
canvas.SaveLayer({.blend_mode = BlendMode::kSource}, std::nullopt,
ImageFilter::MakeBlur(Sigma(20.0), Sigma(20.0),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kClamp));
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
#define FLT_FORWARD(mock, real, method) \
EXPECT_CALL(*mock, method()) \
.WillRepeatedly(::testing::Return(real->method()));
TEST_P(AiksTest, GaussianBlurWithoutDecalSupport) {
if (GetParam() != PlaygroundBackend::kMetal) {
GTEST_SKIP_(
"This backend doesn't yet support setting device capabilities.");
}
if (!WillRenderSomething()) {
// Sometimes these tests are run without playgrounds enabled which is
// pointless for this test since we are asserting that
// `SupportsDecalSamplerAddressMode` is called.
GTEST_SKIP_("This test requires playgrounds.");
}
std::shared_ptr<const Capabilities> old_capabilities =
GetContext()->GetCapabilities();
auto mock_capabilities = std::make_shared<MockCapabilities>();
EXPECT_CALL(*mock_capabilities, SupportsDecalSamplerAddressMode())
.Times(::testing::AtLeast(1))
.WillRepeatedly(::testing::Return(false));
FLT_FORWARD(mock_capabilities, old_capabilities, GetDefaultColorFormat);
FLT_FORWARD(mock_capabilities, old_capabilities, GetDefaultStencilFormat);
FLT_FORWARD(mock_capabilities, old_capabilities, SupportsOffscreenMSAA);
FLT_FORWARD(mock_capabilities, old_capabilities,
SupportsImplicitResolvingMSAA);
FLT_FORWARD(mock_capabilities, old_capabilities, SupportsReadFromResolve);
FLT_FORWARD(mock_capabilities, old_capabilities, SupportsFramebufferFetch);
FLT_FORWARD(mock_capabilities, old_capabilities, SupportsSSBO);
FLT_FORWARD(mock_capabilities, old_capabilities, SupportsCompute);
FLT_FORWARD(mock_capabilities, old_capabilities,
SupportsTextureToTextureBlits);
ASSERT_TRUE(SetCapabilities(mock_capabilities).ok());
auto texture = std::make_shared<Image>(CreateTextureForFixture("boston.jpg"));
Canvas canvas;
canvas.Scale(GetContentScale() * 0.5);
canvas.DrawPaint({.color = Color::Black()});
canvas.DrawImage(
texture, Point(200, 200),
{
.image_filter = ImageFilter::MakeBlur(
Sigma(20.0), Sigma(20.0), FilterContents::BlurStyle::kNormal,
Entity::TileMode::kDecal),
});
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, GaussianBlurOneDimension) {
Canvas canvas;
canvas.Scale(GetContentScale());
canvas.Scale({0.5, 0.5, 1.0});
std::shared_ptr<Texture> boston = CreateTextureForFixture("boston.jpg");
canvas.DrawImage(std::make_shared<Image>(boston), Point(100, 100), Paint{});
canvas.SaveLayer({.blend_mode = BlendMode::kSource}, std::nullopt,
ImageFilter::MakeBlur(Sigma(50.0), Sigma(0.0),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kClamp));
canvas.Restore();
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
// Smoketest to catch issues with the coverage hint.
// Draws a rotated blurred image within a rectangle clip. The center of the clip
// rectangle is the center of the rotated image. The entire area of the clip
// rectangle should be filled with opaque colors output by the blur.
TEST_P(AiksTest, GaussianBlurRotatedAndClipped) {
Canvas canvas;
std::shared_ptr<Texture> boston = CreateTextureForFixture("boston.jpg");
Rect bounds =
Rect::MakeXYWH(0, 0, boston->GetSize().width, boston->GetSize().height);
Vector2 image_center = Vector2(bounds.GetSize() / 2);
Paint paint = {.image_filter =
ImageFilter::MakeBlur(Sigma(20.0), Sigma(20.0),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kDecal)};
Vector2 clip_size = {150, 75};
Vector2 center = Vector2(1024, 768) / 2;
canvas.Scale(GetContentScale());
canvas.ClipRect(
Rect::MakeLTRB(center.x, center.y, center.x, center.y).Expand(clip_size));
canvas.Translate({center.x, center.y, 0});
canvas.Scale({0.6, 0.6, 1});
canvas.Rotate(Degrees(25));
canvas.DrawImageRect(std::make_shared<Image>(boston), /*source=*/bounds,
/*dest=*/bounds.Shift(-image_center), paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, GaussianBlurScaledAndClipped) {
Canvas canvas;
std::shared_ptr<Texture> boston = CreateTextureForFixture("boston.jpg");
Rect bounds =
Rect::MakeXYWH(0, 0, boston->GetSize().width, boston->GetSize().height);
Vector2 image_center = Vector2(bounds.GetSize() / 2);
Paint paint = {.image_filter =
ImageFilter::MakeBlur(Sigma(20.0), Sigma(20.0),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kDecal)};
Vector2 clip_size = {150, 75};
Vector2 center = Vector2(1024, 768) / 2;
canvas.Scale(GetContentScale());
canvas.ClipRect(
Rect::MakeLTRB(center.x, center.y, center.x, center.y).Expand(clip_size));
canvas.Translate({center.x, center.y, 0});
canvas.Scale({0.6, 0.6, 1});
canvas.DrawImageRect(std::make_shared<Image>(boston), /*source=*/bounds,
/*dest=*/bounds.Shift(-image_center), paint);
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, GaussianBlurRotatedAndClippedInteractive) {
std::shared_ptr<Texture> boston = CreateTextureForFixture("boston.jpg");
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 float rotation = 0;
static float scale = 0.6;
static int selected_tile_mode = 3;
ImGui::Begin("Controls", nullptr, ImGuiWindowFlags_AlwaysAutoResize);
{
ImGui::SliderFloat("Rotation (degrees)", &rotation, -180, 180);
ImGui::SliderFloat("Scale", &scale, 0, 2.0);
ImGui::Combo("Tile mode", &selected_tile_mode, tile_mode_names,
sizeof(tile_mode_names) / sizeof(char*));
}
ImGui::End();
Canvas canvas;
Rect bounds =
Rect::MakeXYWH(0, 0, boston->GetSize().width, boston->GetSize().height);
Vector2 image_center = Vector2(bounds.GetSize() / 2);
Paint paint = {.image_filter =
ImageFilter::MakeBlur(Sigma(20.0), Sigma(20.0),
FilterContents::BlurStyle::kNormal,
tile_modes[selected_tile_mode])};
auto [handle_a, handle_b] = IMPELLER_PLAYGROUND_LINE(
Point(362, 309), Point(662, 459), 20, Color::Red(), Color::Red());
Vector2 center = Vector2(1024, 768) / 2;
canvas.Scale(GetContentScale());
canvas.ClipRect(
Rect::MakeLTRB(handle_a.x, handle_a.y, handle_b.x, handle_b.y));
canvas.Translate({center.x, center.y, 0});
canvas.Scale({scale, scale, 1});
canvas.Rotate(Degrees(rotation));
canvas.DrawImageRect(std::make_shared<Image>(boston), /*source=*/bounds,
/*dest=*/bounds.Shift(-image_center), paint);
return canvas.EndRecordingAsPicture();
};
ASSERT_TRUE(OpenPlaygroundHere(callback));
}
TEST_P(AiksTest, SubpassWithClearColorOptimization) {
Canvas canvas;
// Use a non-srcOver blend mode to ensure that we don't detect this as an
// opacity peephole optimization.
canvas.SaveLayer(
{.color = Color::Blue().WithAlpha(0.5), .blend_mode = BlendMode::kSource},
Rect::MakeLTRB(0, 0, 200, 200));
canvas.DrawPaint(
{.color = Color::BlackTransparent(), .blend_mode = BlendMode::kSource});
canvas.Restore();
canvas.SaveLayer(
{.color = Color::Blue(), .blend_mode = BlendMode::kDestinationOver});
canvas.Restore();
// This playground should appear blank on CI since we are only drawing
// transparent black. If the clear color optimization is broken, the texture
// will be filled with NaNs and may produce a magenta texture on macOS or iOS.
ASSERT_TRUE(OpenPlaygroundHere(canvas.EndRecordingAsPicture()));
}
TEST_P(AiksTest, GuassianBlurUpdatesMipmapContents) {
// This makes sure if mip maps are recycled across invocations of blurs the
// contents get updated each frame correctly. If they aren't updated the color
// inside the blur and outside the blur will be different.
//
// If there is some change to render target caching this could display a false
// positive in the future. Also, if the LOD that is rendered is 1 it could
// present a false positive.
int32_t count = 0;
auto callback = [&](AiksContext& renderer) -> std::optional<Picture> {
Canvas canvas;
if (count++ == 0) {
canvas.DrawCircle({100, 100}, 50, {.color = Color::CornflowerBlue()});
} else {
canvas.DrawCircle({100, 100}, 50, {.color = Color::Chartreuse()});
}
canvas.ClipRRect(Rect::MakeLTRB(75, 50, 375, 275), {20, 20});
canvas.SaveLayer({.blend_mode = BlendMode::kSource}, std::nullopt,
ImageFilter::MakeBlur(Sigma(30.0), Sigma(30.0),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kClamp));
canvas.Restore();
return canvas.EndRecordingAsPicture();
};
ASSERT_TRUE(OpenPlaygroundHere(callback));
}
TEST_P(AiksTest, GaussianBlurSetsMipCountOnPass) {
Canvas canvas;
canvas.DrawCircle({100, 100}, 50, {.color = Color::CornflowerBlue()});
canvas.SaveLayer({}, std::nullopt,
ImageFilter::MakeBlur(Sigma(3), Sigma(3),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kClamp));
canvas.Restore();
Picture picture = canvas.EndRecordingAsPicture();
int32_t max_mip_count = 0;
picture.pass->IterateAllElements([&](EntityPass::Element& element) -> bool {
if (auto subpass = std::get_if<std::unique_ptr<EntityPass>>(&element)) {
max_mip_count =
std::max(max_mip_count, subpass->get()->GetRequiredMipCount());
}
return true;
});
EXPECT_EQ(1, max_mip_count);
}
TEST_P(AiksTest, GaussianBlurAllocatesCorrectMipCountRenderTarget) {
Canvas canvas;
canvas.DrawCircle({100, 100}, 50, {.color = Color::CornflowerBlue()});
canvas.SaveLayer({}, std::nullopt,
ImageFilter::MakeBlur(Sigma(3), Sigma(3),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kClamp));
canvas.Restore();
Picture picture = canvas.EndRecordingAsPicture();
std::shared_ptr<RenderTargetCache> cache =
std::make_shared<RenderTargetCache>(GetContext()->GetResourceAllocator());
AiksContext aiks_context(GetContext(), nullptr, cache);
picture.ToImage(aiks_context, {100, 100});
size_t max_mip_count = 0;
for (auto it = cache->GetTextureDataBegin(); it != cache->GetTextureDataEnd();
++it) {
max_mip_count =
std::max(it->texture->GetTextureDescriptor().mip_count, max_mip_count);
}
EXPECT_EQ(max_mip_count, 1lu);
}
TEST_P(AiksTest, GaussianBlurMipMapNestedLayer) {
Canvas canvas;
canvas.DrawPaint({.color = Color::Wheat()});
canvas.SaveLayer({.blend_mode = BlendMode::kMultiply});
canvas.DrawCircle({100, 100}, 50, {.color = Color::CornflowerBlue()});
canvas.SaveLayer({}, std::nullopt,
ImageFilter::MakeBlur(Sigma(30), Sigma(30),
FilterContents::BlurStyle::kNormal,
Entity::TileMode::kClamp));
canvas.DrawCircle({200, 200}, 50, {.color = Color::Chartreuse()});
Picture picture = canvas.EndRecordingAsPicture();
std::shared_ptr<RenderTargetCache> cache =
std::make_shared<RenderTargetCache>(GetContext()->GetResourceAllocator());
AiksContext aiks_context(GetContext(), nullptr, cache);
picture.ToImage(aiks_context, {100, 100});
size_t max_mip_count = 0;
for (auto it = cache->GetTextureDataBegin(); it != cache->GetTextureDataEnd();
++it) {
max_mip_count =
std::max(it->texture->GetTextureDescriptor().mip_count, max_mip_count);
}
EXPECT_EQ(max_mip_count, 1lu);
}
} // namespace testing
} // namespace impeller