| // 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/lib/ui/painting/canvas.h" |
| |
| #define _USE_MATH_DEFINES |
| #include <math.h> |
| |
| #include "flutter/flow/layers/physical_shape_layer.h" |
| #include "flutter/lib/ui/painting/image.h" |
| #include "flutter/lib/ui/painting/matrix.h" |
| #include "flutter/lib/ui/ui_dart_state.h" |
| #include "flutter/lib/ui/window/window.h" |
| #include "third_party/skia/include/core/SkBitmap.h" |
| #include "third_party/skia/include/core/SkCanvas.h" |
| #include "third_party/skia/include/core/SkRSXform.h" |
| #include "third_party/tonic/converter/dart_converter.h" |
| #include "third_party/tonic/dart_args.h" |
| #include "third_party/tonic/dart_binding_macros.h" |
| #include "third_party/tonic/dart_library_natives.h" |
| |
| using tonic::ToDart; |
| |
| namespace flutter { |
| |
| static void Canvas_constructor(Dart_NativeArguments args) { |
| UIDartState::ThrowIfUIOperationsProhibited(); |
| DartCallConstructor(&Canvas::Create, args); |
| } |
| |
| IMPLEMENT_WRAPPERTYPEINFO(ui, Canvas); |
| |
| #define FOR_EACH_BINDING(V) \ |
| V(Canvas, save) \ |
| V(Canvas, saveLayerWithoutBounds) \ |
| V(Canvas, saveLayer) \ |
| V(Canvas, restore) \ |
| V(Canvas, getSaveCount) \ |
| V(Canvas, translate) \ |
| V(Canvas, scale) \ |
| V(Canvas, rotate) \ |
| V(Canvas, skew) \ |
| V(Canvas, transform) \ |
| V(Canvas, clipRect) \ |
| V(Canvas, clipRRect) \ |
| V(Canvas, clipPath) \ |
| V(Canvas, drawColor) \ |
| V(Canvas, drawLine) \ |
| V(Canvas, drawPaint) \ |
| V(Canvas, drawRect) \ |
| V(Canvas, drawRRect) \ |
| V(Canvas, drawDRRect) \ |
| V(Canvas, drawOval) \ |
| V(Canvas, drawCircle) \ |
| V(Canvas, drawArc) \ |
| V(Canvas, drawPath) \ |
| V(Canvas, drawImage) \ |
| V(Canvas, drawImageRect) \ |
| V(Canvas, drawImageNine) \ |
| V(Canvas, drawPicture) \ |
| V(Canvas, drawPoints) \ |
| V(Canvas, drawVertices) \ |
| V(Canvas, drawAtlas) \ |
| V(Canvas, drawShadow) |
| |
| FOR_EACH_BINDING(DART_NATIVE_CALLBACK) |
| |
| void Canvas::RegisterNatives(tonic::DartLibraryNatives* natives) { |
| natives->Register({{"Canvas_constructor", Canvas_constructor, 6, true}, |
| FOR_EACH_BINDING(DART_REGISTER_NATIVE)}); |
| } |
| |
| fml::RefPtr<Canvas> Canvas::Create(PictureRecorder* recorder, |
| double left, |
| double top, |
| double right, |
| double bottom) { |
| if (!recorder) |
| Dart_ThrowException( |
| ToDart("Canvas constructor called with non-genuine PictureRecorder.")); |
| FML_DCHECK(!recorder->isRecording()); // verified by Dart code |
| fml::RefPtr<Canvas> canvas = fml::MakeRefCounted<Canvas>( |
| recorder->BeginRecording(SkRect::MakeLTRB(left, top, right, bottom))); |
| recorder->set_canvas(canvas); |
| return canvas; |
| } |
| |
| Canvas::Canvas(SkCanvas* canvas) : canvas_(canvas) {} |
| |
| Canvas::~Canvas() {} |
| |
| void Canvas::save() { |
| if (!canvas_) |
| return; |
| canvas_->save(); |
| } |
| |
| void Canvas::saveLayerWithoutBounds(const Paint& paint, |
| const PaintData& paint_data) { |
| if (!canvas_) |
| return; |
| canvas_->saveLayer(nullptr, paint.paint()); |
| } |
| |
| void Canvas::saveLayer(double left, |
| double top, |
| double right, |
| double bottom, |
| const Paint& paint, |
| const PaintData& paint_data) { |
| if (!canvas_) |
| return; |
| SkRect bounds = SkRect::MakeLTRB(left, top, right, bottom); |
| canvas_->saveLayer(&bounds, paint.paint()); |
| } |
| |
| void Canvas::restore() { |
| if (!canvas_) |
| return; |
| canvas_->restore(); |
| } |
| |
| int Canvas::getSaveCount() { |
| if (!canvas_) |
| return 0; |
| return canvas_->getSaveCount(); |
| } |
| |
| void Canvas::translate(double dx, double dy) { |
| if (!canvas_) |
| return; |
| canvas_->translate(dx, dy); |
| } |
| |
| void Canvas::scale(double sx, double sy) { |
| if (!canvas_) |
| return; |
| canvas_->scale(sx, sy); |
| } |
| |
| void Canvas::rotate(double radians) { |
| if (!canvas_) |
| return; |
| canvas_->rotate(radians * 180.0 / M_PI); |
| } |
| |
| void Canvas::skew(double sx, double sy) { |
| if (!canvas_) |
| return; |
| canvas_->skew(sx, sy); |
| } |
| |
| void Canvas::transform(const tonic::Float64List& matrix4) { |
| if (!canvas_) |
| return; |
| canvas_->concat(ToSkMatrix(matrix4)); |
| } |
| |
| void Canvas::clipRect(double left, |
| double top, |
| double right, |
| double bottom, |
| SkClipOp clipOp, |
| bool doAntiAlias) { |
| if (!canvas_) |
| return; |
| canvas_->clipRect(SkRect::MakeLTRB(left, top, right, bottom), clipOp, |
| doAntiAlias); |
| } |
| |
| void Canvas::clipRRect(const RRect& rrect, bool doAntiAlias) { |
| if (!canvas_) |
| return; |
| canvas_->clipRRect(rrect.sk_rrect, doAntiAlias); |
| } |
| |
| void Canvas::clipPath(const CanvasPath* path, bool doAntiAlias) { |
| if (!canvas_) |
| return; |
| if (!path) |
| Dart_ThrowException( |
| ToDart("Canvas.clipPath called with non-genuine Path.")); |
| external_allocation_size_ += path->path().approximateBytesUsed(); |
| canvas_->clipPath(path->path(), doAntiAlias); |
| } |
| |
| void Canvas::drawColor(SkColor color, SkBlendMode blend_mode) { |
| if (!canvas_) |
| return; |
| canvas_->drawColor(color, blend_mode); |
| } |
| |
| void Canvas::drawLine(double x1, |
| double y1, |
| double x2, |
| double y2, |
| const Paint& paint, |
| const PaintData& paint_data) { |
| if (!canvas_) |
| return; |
| canvas_->drawLine(x1, y1, x2, y2, *paint.paint()); |
| } |
| |
| void Canvas::drawPaint(const Paint& paint, const PaintData& paint_data) { |
| if (!canvas_) |
| return; |
| canvas_->drawPaint(*paint.paint()); |
| } |
| |
| void Canvas::drawRect(double left, |
| double top, |
| double right, |
| double bottom, |
| const Paint& paint, |
| const PaintData& paint_data) { |
| if (!canvas_) |
| return; |
| canvas_->drawRect(SkRect::MakeLTRB(left, top, right, bottom), *paint.paint()); |
| } |
| |
| void Canvas::drawRRect(const RRect& rrect, |
| const Paint& paint, |
| const PaintData& paint_data) { |
| if (!canvas_) |
| return; |
| canvas_->drawRRect(rrect.sk_rrect, *paint.paint()); |
| } |
| |
| void Canvas::drawDRRect(const RRect& outer, |
| const RRect& inner, |
| const Paint& paint, |
| const PaintData& paint_data) { |
| if (!canvas_) |
| return; |
| canvas_->drawDRRect(outer.sk_rrect, inner.sk_rrect, *paint.paint()); |
| } |
| |
| void Canvas::drawOval(double left, |
| double top, |
| double right, |
| double bottom, |
| const Paint& paint, |
| const PaintData& paint_data) { |
| if (!canvas_) |
| return; |
| canvas_->drawOval(SkRect::MakeLTRB(left, top, right, bottom), *paint.paint()); |
| } |
| |
| void Canvas::drawCircle(double x, |
| double y, |
| double radius, |
| const Paint& paint, |
| const PaintData& paint_data) { |
| if (!canvas_) |
| return; |
| canvas_->drawCircle(x, y, radius, *paint.paint()); |
| } |
| |
| void Canvas::drawArc(double left, |
| double top, |
| double right, |
| double bottom, |
| double startAngle, |
| double sweepAngle, |
| bool useCenter, |
| const Paint& paint, |
| const PaintData& paint_data) { |
| if (!canvas_) |
| return; |
| canvas_->drawArc(SkRect::MakeLTRB(left, top, right, bottom), |
| startAngle * 180.0 / M_PI, sweepAngle * 180.0 / M_PI, |
| useCenter, *paint.paint()); |
| } |
| |
| void Canvas::drawPath(const CanvasPath* path, |
| const Paint& paint, |
| const PaintData& paint_data) { |
| if (!canvas_) |
| return; |
| if (!path) |
| Dart_ThrowException( |
| ToDart("Canvas.drawPath called with non-genuine Path.")); |
| external_allocation_size_ += path->path().approximateBytesUsed(); |
| canvas_->drawPath(path->path(), *paint.paint()); |
| } |
| |
| void Canvas::drawImage(const CanvasImage* image, |
| double x, |
| double y, |
| const Paint& paint, |
| const PaintData& paint_data) { |
| if (!canvas_) |
| return; |
| if (!image) { |
| Dart_ThrowException( |
| ToDart("Canvas.drawImage called with non-genuine Image.")); |
| return; |
| } |
| canvas_->drawImage(image->image(), x, y, paint.paint()); |
| } |
| |
| void Canvas::drawImageRect(const CanvasImage* image, |
| double src_left, |
| double src_top, |
| double src_right, |
| double src_bottom, |
| double dst_left, |
| double dst_top, |
| double dst_right, |
| double dst_bottom, |
| const Paint& paint, |
| const PaintData& paint_data) { |
| if (!canvas_) |
| return; |
| if (!image) |
| Dart_ThrowException( |
| ToDart("Canvas.drawImageRect called with non-genuine Image.")); |
| SkRect src = SkRect::MakeLTRB(src_left, src_top, src_right, src_bottom); |
| SkRect dst = SkRect::MakeLTRB(dst_left, dst_top, dst_right, dst_bottom); |
| canvas_->drawImageRect(image->image(), src, dst, paint.paint(), |
| SkCanvas::kFast_SrcRectConstraint); |
| } |
| |
| void Canvas::drawImageNine(const CanvasImage* image, |
| double center_left, |
| double center_top, |
| double center_right, |
| double center_bottom, |
| double dst_left, |
| double dst_top, |
| double dst_right, |
| double dst_bottom, |
| const Paint& paint, |
| const PaintData& paint_data) { |
| if (!canvas_) |
| return; |
| if (!image) |
| Dart_ThrowException( |
| ToDart("Canvas.drawImageNine called with non-genuine Image.")); |
| SkRect center = |
| SkRect::MakeLTRB(center_left, center_top, center_right, center_bottom); |
| SkIRect icenter; |
| center.round(&icenter); |
| SkRect dst = SkRect::MakeLTRB(dst_left, dst_top, dst_right, dst_bottom); |
| canvas_->drawImageNine(image->image(), icenter, dst, paint.paint()); |
| } |
| |
| void Canvas::drawPicture(Picture* picture) { |
| if (!canvas_) |
| return; |
| if (!picture) |
| Dart_ThrowException( |
| ToDart("Canvas.drawPicture called with non-genuine Picture.")); |
| external_allocation_size_ += picture->GetAllocationSize(); |
| canvas_->drawPicture(picture->picture().get()); |
| } |
| |
| void Canvas::drawPoints(const Paint& paint, |
| const PaintData& paint_data, |
| SkCanvas::PointMode point_mode, |
| const tonic::Float32List& points) { |
| if (!canvas_) |
| return; |
| |
| static_assert(sizeof(SkPoint) == sizeof(float) * 2, |
| "SkPoint doesn't use floats."); |
| |
| canvas_->drawPoints(point_mode, |
| points.num_elements() / 2, // SkPoints have two floats. |
| reinterpret_cast<const SkPoint*>(points.data()), |
| *paint.paint()); |
| } |
| |
| void Canvas::drawVertices(const Vertices* vertices, |
| SkBlendMode blend_mode, |
| const Paint& paint, |
| const PaintData& paint_data) { |
| if (!canvas_) |
| return; |
| if (!vertices) |
| Dart_ThrowException( |
| ToDart("Canvas.drawVertices called with non-genuine Vertices.")); |
| external_allocation_size_ += vertices->GetAllocationSize(); |
| canvas_->drawVertices(vertices->vertices(), blend_mode, *paint.paint()); |
| } |
| |
| void Canvas::drawAtlas(const Paint& paint, |
| const PaintData& paint_data, |
| CanvasImage* atlas, |
| const tonic::Float32List& transforms, |
| const tonic::Float32List& rects, |
| const tonic::Int32List& colors, |
| SkBlendMode blend_mode, |
| const tonic::Float32List& cull_rect) { |
| if (!canvas_) |
| return; |
| if (!atlas) |
| Dart_ThrowException( |
| ToDart("Canvas.drawAtlas or Canvas.drawRawAtlas called with " |
| "non-genuine Image.")); |
| |
| sk_sp<SkImage> skImage = atlas->image(); |
| |
| static_assert(sizeof(SkRSXform) == sizeof(float) * 4, |
| "SkRSXform doesn't use floats."); |
| static_assert(sizeof(SkRect) == sizeof(float) * 4, |
| "SkRect doesn't use floats."); |
| |
| external_allocation_size_ += atlas->GetAllocationSize(); |
| canvas_->drawAtlas( |
| skImage.get(), reinterpret_cast<const SkRSXform*>(transforms.data()), |
| reinterpret_cast<const SkRect*>(rects.data()), |
| reinterpret_cast<const SkColor*>(colors.data()), |
| rects.num_elements() / 4, // SkRect have four floats. |
| blend_mode, reinterpret_cast<const SkRect*>(cull_rect.data()), |
| paint.paint()); |
| } |
| |
| void Canvas::drawShadow(const CanvasPath* path, |
| SkColor color, |
| double elevation, |
| bool transparentOccluder) { |
| if (!path) |
| Dart_ThrowException( |
| ToDart("Canvas.drawShader called with non-genuine Path.")); |
| SkScalar dpr = |
| UIDartState::Current()->window()->viewport_metrics().device_pixel_ratio; |
| external_allocation_size_ += path->path().approximateBytesUsed(); |
| flutter::PhysicalShapeLayer::DrawShadow(canvas_, path->path(), color, |
| elevation, transparentOccluder, dpr); |
| } |
| |
| void Canvas::Clear() { |
| canvas_ = nullptr; |
| } |
| |
| bool Canvas::IsRecording() const { |
| return !!canvas_; |
| } |
| |
| } // namespace flutter |
