SkiaCanvas.h revision afc221499d943386256feb9db46c119ff834bf79
1/* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16#pragma once 17 18#include "hwui/Canvas.h" 19#include "CanvasProperty.h" 20#include "DeferredLayerUpdater.h" 21#include "RenderNode.h" 22#include "VectorDrawable.h" 23 24#include <SkCanvas.h> 25#include <SkClipStack.h> 26#include <SkTArray.h> 27 28namespace android { 29 30// Holds an SkCanvas reference plus additional native data. 31class SkiaCanvas : public Canvas { 32public: 33 explicit SkiaCanvas(const SkBitmap& bitmap); 34 35 /** 36 * Create a new SkiaCanvas. 37 * 38 * @param canvas SkCanvas to handle calls made to this SkiaCanvas. Must 39 * not be NULL. This constructor will ref() the SkCanvas, and unref() 40 * it in its destructor. 41 */ 42 explicit SkiaCanvas(SkCanvas* canvas) : mCanvas(canvas) { 43 SkASSERT(canvas); 44 canvas->ref(); 45 } 46 47 virtual SkCanvas* asSkCanvas() override { 48 return mCanvas.get(); 49 } 50 51 virtual void resetRecording(int width, int height) override { 52 LOG_ALWAYS_FATAL("SkiaCanvas cannot be reset as a recording canvas"); 53 } 54 55 virtual uirenderer::DisplayList* finishRecording() override { 56 LOG_ALWAYS_FATAL("SkiaCanvas does not produce a DisplayList"); 57 return nullptr; 58 } 59 virtual void insertReorderBarrier(bool enableReorder) override { 60 LOG_ALWAYS_FATAL("SkiaCanvas does not support reordering barriers"); 61 } 62 63 virtual void setBitmap(const SkBitmap& bitmap) override; 64 65 virtual bool isOpaque() override; 66 virtual int width() override; 67 virtual int height() override; 68 69 virtual void setHighContrastText(bool highContrastText) override { 70 mHighContrastText = highContrastText; 71 } 72 virtual bool isHighContrastText() override { return mHighContrastText; } 73 74 virtual int getSaveCount() const override; 75 virtual int save(SaveFlags::Flags flags) override; 76 virtual void restore() override; 77 virtual void restoreToCount(int saveCount) override; 78 79 virtual int saveLayer(float left, float top, float right, float bottom, 80 const SkPaint* paint, SaveFlags::Flags flags) override; 81 virtual int saveLayerAlpha(float left, float top, float right, float bottom, 82 int alpha, SaveFlags::Flags flags) override; 83 84 virtual void getMatrix(SkMatrix* outMatrix) const override; 85 virtual void setMatrix(const SkMatrix& matrix) override; 86 virtual void concat(const SkMatrix& matrix) override; 87 virtual void rotate(float degrees) override; 88 virtual void scale(float sx, float sy) override; 89 virtual void skew(float sx, float sy) override; 90 virtual void translate(float dx, float dy) override; 91 92 virtual bool getClipBounds(SkRect* outRect) const override; 93 virtual bool quickRejectRect(float left, float top, float right, float bottom) const override; 94 virtual bool quickRejectPath(const SkPath& path) const override; 95 virtual bool clipRect(float left, float top, float right, float bottom, 96 SkRegion::Op op) override; 97 virtual bool clipPath(const SkPath* path, SkRegion::Op op) override; 98 virtual bool clipRegion(const SkRegion* region, SkRegion::Op op) override; 99 100 virtual SkDrawFilter* getDrawFilter() override; 101 virtual void setDrawFilter(SkDrawFilter* drawFilter) override; 102 103 virtual void drawColor(int color, SkXfermode::Mode mode) override; 104 virtual void drawPaint(const SkPaint& paint) override; 105 106 virtual void drawPoint(float x, float y, const SkPaint& paint) override; 107 virtual void drawPoints(const float* points, int count, const SkPaint& paint) override; 108 virtual void drawLine(float startX, float startY, float stopX, float stopY, 109 const SkPaint& paint) override; 110 virtual void drawLines(const float* points, int count, const SkPaint& paint) override; 111 virtual void drawRect(float left, float top, float right, float bottom, 112 const SkPaint& paint) override; 113 virtual void drawRegion(const SkRegion& region, const SkPaint& paint) override; 114 virtual void drawRoundRect(float left, float top, float right, float bottom, 115 float rx, float ry, const SkPaint& paint) override; 116 virtual void drawCircle(float x, float y, float radius, const SkPaint& paint) override; 117 virtual void drawOval(float left, float top, float right, float bottom, 118 const SkPaint& paint) override; 119 virtual void drawArc(float left, float top, float right, float bottom, 120 float startAngle, float sweepAngle, bool useCenter, const SkPaint& paint) override; 121 virtual void drawPath(const SkPath& path, const SkPaint& paint) override; 122 virtual void drawVertices(SkCanvas::VertexMode vertexMode, int vertexCount, 123 const float* verts, const float* tex, const int* colors, 124 const uint16_t* indices, int indexCount, const SkPaint& paint) override; 125 126 virtual void drawBitmap(const SkBitmap& bitmap, float left, float top, 127 const SkPaint* paint) override; 128 virtual void drawBitmap(const SkBitmap& bitmap, const SkMatrix& matrix, 129 const SkPaint* paint) override; 130 virtual void drawBitmap(const SkBitmap& bitmap, float srcLeft, float srcTop, 131 float srcRight, float srcBottom, float dstLeft, float dstTop, 132 float dstRight, float dstBottom, const SkPaint* paint) override; 133 virtual void drawBitmapMesh(const SkBitmap& bitmap, int meshWidth, int meshHeight, 134 const float* vertices, const int* colors, const SkPaint* paint) override; 135 virtual void drawNinePatch(const SkBitmap& bitmap, const android::Res_png_9patch& chunk, 136 float dstLeft, float dstTop, float dstRight, float dstBottom, 137 const SkPaint* paint) override; 138 139 virtual bool drawTextAbsolutePos() const override { return true; } 140 virtual void drawVectorDrawable(VectorDrawableRoot* vectorDrawable) override; 141 142 virtual void drawRoundRect(uirenderer::CanvasPropertyPrimitive* left, 143 uirenderer::CanvasPropertyPrimitive* top, uirenderer::CanvasPropertyPrimitive* right, 144 uirenderer::CanvasPropertyPrimitive* bottom, uirenderer::CanvasPropertyPrimitive* rx, 145 uirenderer::CanvasPropertyPrimitive* ry, uirenderer::CanvasPropertyPaint* paint) override; 146 virtual void drawCircle(uirenderer::CanvasPropertyPrimitive* x, 147 uirenderer::CanvasPropertyPrimitive* y, uirenderer::CanvasPropertyPrimitive* radius, 148 uirenderer::CanvasPropertyPaint* paint) override; 149 150 virtual void drawLayer(uirenderer::DeferredLayerUpdater* layerHandle) override; 151 virtual void drawRenderNode(uirenderer::RenderNode* renderNode) override; 152 virtual void callDrawGLFunction(Functor* functor, 153 uirenderer::GlFunctorLifecycleListener* listener) override; 154 155protected: 156 explicit SkiaCanvas() {} 157 void reset(SkCanvas* skiaCanvas); 158 void drawDrawable(SkDrawable* drawable) { mCanvas->drawDrawable(drawable); } 159 160 virtual void drawGlyphs(const uint16_t* text, const float* positions, int count, 161 const SkPaint& paint, float x, float y, 162 float boundsLeft, float boundsTop, float boundsRight, float boundsBottom, 163 float totalAdvance) override; 164 virtual void drawLayoutOnPath(const minikin::Layout& layout, float hOffset, float vOffset, 165 const SkPaint& paint, const SkPath& path, size_t start, size_t end) override; 166 167private: 168 struct SaveRec { 169 int saveCount; 170 SaveFlags::Flags saveFlags; 171 }; 172 173 bool mHighContrastText = false; 174 175 void recordPartialSave(SaveFlags::Flags flags); 176 void saveClipsForFrame(SkTArray<SkClipStack::Element>& clips, int frameSaveCount); 177 void applyClips(const SkTArray<SkClipStack::Element>& clips); 178 179 void drawPoints(const float* points, int count, const SkPaint& paint, 180 SkCanvas::PointMode mode); 181 182 sk_sp<SkCanvas> mCanvas; 183 std::unique_ptr<SkDeque> mSaveStack; // lazily allocated, tracks partial saves. 184}; 185 186} // namespace android 187 188