| // 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. |
| |
| #ifndef FLUTTER_LIB_UI_PAINTING_CANVAS_H_ |
| #define FLUTTER_LIB_UI_PAINTING_CANVAS_H_ |
| |
| #include "flutter/display_list/display_list_blend_mode.h" |
| #include "flutter/lib/ui/dart_wrapper.h" |
| #include "flutter/lib/ui/painting/paint.h" |
| #include "flutter/lib/ui/painting/path.h" |
| #include "flutter/lib/ui/painting/picture.h" |
| #include "flutter/lib/ui/painting/picture_recorder.h" |
| #include "flutter/lib/ui/painting/rrect.h" |
| #include "flutter/lib/ui/painting/vertices.h" |
| #include "third_party/skia/include/core/SkCanvas.h" |
| #include "third_party/skia/include/utils/SkShadowUtils.h" |
| #include "third_party/tonic/typed_data/typed_list.h" |
| |
| namespace tonic { |
| class DartLibraryNatives; |
| } // namespace tonic |
| |
| namespace flutter { |
| class CanvasImage; |
| |
| class Canvas : public RefCountedDartWrappable<Canvas>, DisplayListOpFlags { |
| DEFINE_WRAPPERTYPEINFO(); |
| FML_FRIEND_MAKE_REF_COUNTED(Canvas); |
| |
| public: |
| static fml::RefPtr<Canvas> Create(PictureRecorder* recorder, |
| double left, |
| double top, |
| double right, |
| double bottom); |
| |
| ~Canvas() override; |
| |
| void save(); |
| void saveLayerWithoutBounds(const Paint& paint, const PaintData& paint_data); |
| void saveLayer(double left, |
| double top, |
| double right, |
| double bottom, |
| const Paint& paint, |
| const PaintData& paint_data); |
| void restore(); |
| int getSaveCount(); |
| |
| void translate(double dx, double dy); |
| void scale(double sx, double sy); |
| void rotate(double radians); |
| void skew(double sx, double sy); |
| void transform(const tonic::Float64List& matrix4); |
| |
| void clipRect(double left, |
| double top, |
| double right, |
| double bottom, |
| SkClipOp clipOp, |
| bool doAntiAlias = true); |
| void clipRRect(const RRect& rrect, bool doAntiAlias = true); |
| void clipPath(const CanvasPath* path, bool doAntiAlias = true); |
| |
| void drawColor(SkColor color, DlBlendMode blend_mode); |
| void drawLine(double x1, |
| double y1, |
| double x2, |
| double y2, |
| const Paint& paint, |
| const PaintData& paint_data); |
| void drawPaint(const Paint& paint, const PaintData& paint_data); |
| void drawRect(double left, |
| double top, |
| double right, |
| double bottom, |
| const Paint& paint, |
| const PaintData& paint_data); |
| void drawRRect(const RRect& rrect, |
| const Paint& paint, |
| const PaintData& paint_data); |
| void drawDRRect(const RRect& outer, |
| const RRect& inner, |
| const Paint& paint, |
| const PaintData& paint_data); |
| void drawOval(double left, |
| double top, |
| double right, |
| double bottom, |
| const Paint& paint, |
| const PaintData& paint_data); |
| void drawCircle(double x, |
| double y, |
| double radius, |
| const Paint& paint, |
| const PaintData& paint_data); |
| void drawArc(double left, |
| double top, |
| double right, |
| double bottom, |
| double startAngle, |
| double sweepAngle, |
| bool useCenter, |
| const Paint& paint, |
| const PaintData& paint_data); |
| void drawPath(const CanvasPath* path, |
| const Paint& paint, |
| const PaintData& paint_data); |
| void drawImage(const CanvasImage* image, |
| double x, |
| double y, |
| const Paint& paint, |
| const PaintData& paint_data, |
| int filterQualityIndex); |
| void 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, |
| int filterQualityIndex); |
| void 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, |
| int bitmapSamplingIndex); |
| void drawPicture(Picture* picture); |
| |
| // The paint argument is first for the following functions because Paint |
| // unwraps a number of C++ objects. Once we create a view unto a |
| // Float32List, we cannot re-enter the VM to unwrap objects. That means we |
| // either need to process the paint argument first. |
| |
| void drawPoints(const Paint& paint, |
| const PaintData& paint_data, |
| SkCanvas::PointMode point_mode, |
| const tonic::Float32List& points); |
| |
| void drawVertices(const Vertices* vertices, |
| DlBlendMode blend_mode, |
| const Paint& paint, |
| const PaintData& paint_data); |
| |
| void drawAtlas(const Paint& paint, |
| const PaintData& paint_data, |
| int filterQualityIndex, |
| CanvasImage* atlas, |
| const tonic::Float32List& transforms, |
| const tonic::Float32List& rects, |
| const tonic::Int32List& colors, |
| DlBlendMode blend_mode, |
| const tonic::Float32List& cull_rect); |
| |
| void drawShadow(const CanvasPath* path, |
| SkColor color, |
| double elevation, |
| bool transparentOccluder); |
| |
| SkCanvas* canvas() const { return canvas_; } |
| void Invalidate(); |
| |
| static void RegisterNatives(tonic::DartLibraryNatives* natives); |
| |
| private: |
| explicit Canvas(SkCanvas* canvas); |
| |
| // The SkCanvas is supplied by a call to SkPictureRecorder::beginRecording, |
| // which does not transfer ownership. For this reason, we hold a raw |
| // pointer and manually set to null in Clear. |
| SkCanvas* canvas_; |
| |
| // A copy of the recorder used by the SkCanvas->DisplayList adapter for cases |
| // where we cannot record the SkCanvas method call through the various OnOp() |
| // virtual methods or where we can be more efficient by talking directly in |
| // the DisplayList operation lexicon. The recorder has a method for recording |
| // paint attributes from an SkPaint and an operation type as well as access |
| // to the raw DisplayListBuilder for emitting custom rendering operations. |
| sk_sp<DisplayListCanvasRecorder> display_list_recorder_; |
| DisplayListBuilder* builder() { |
| return display_list_recorder_->builder().get(); |
| } |
| }; |
| |
| } // namespace flutter |
| |
| #endif // FLUTTER_LIB_UI_PAINTING_CANVAS_H_ |