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 "CanvasProperty.h" 19 #ifdef __ANDROID__ // Layoutlib does not support hardware acceleration 20 #include "DeferredLayerUpdater.h" 21 #endif 22 #include "RenderNode.h" 23 #include "VectorDrawable.h" 24 #include "hwui/Canvas.h" 25 #include "hwui/Paint.h" 26 #include "hwui/BlurDrawLooper.h" 27 28 #include <SkCanvas.h> 29 #include <SkDeque.h> 30 #include "pipeline/skia/AnimatedDrawables.h" 31 #include "src/core/SkArenaAlloc.h" 32 33 #include <cassert> 34 #include <optional> 35 36 namespace android { 37 38 // Holds an SkCanvas reference plus additional native data. 39 class SkiaCanvas : public Canvas { 40 public: 41 explicit SkiaCanvas(const SkBitmap& bitmap); 42 43 /** 44 * Create a new SkiaCanvas. 45 * 46 * @param canvas SkCanvas to handle calls made to this SkiaCanvas. Must 47 * not be NULL. This constructor does not take ownership, so the caller 48 * must guarantee that it remains valid while the SkiaCanvas is valid. 49 */ 50 explicit SkiaCanvas(SkCanvas* canvas); 51 52 virtual ~SkiaCanvas(); 53 resetRecording(int width,int height,uirenderer::RenderNode * renderNode)54 virtual void resetRecording(int width, int height, 55 uirenderer::RenderNode* renderNode) override { 56 LOG_ALWAYS_FATAL("SkiaCanvas cannot be reset as a recording canvas"); 57 } 58 finishRecording(uirenderer::RenderNode *)59 virtual void finishRecording(uirenderer::RenderNode*) override { 60 LOG_ALWAYS_FATAL("SkiaCanvas does not produce a DisplayList"); 61 } enableZ(bool enableZ)62 virtual void enableZ(bool enableZ) override { 63 LOG_ALWAYS_FATAL("SkiaCanvas does not support enableZ"); 64 } 65 66 virtual void punchHole(const SkRRect& rect) override; 67 68 virtual void setBitmap(const SkBitmap& bitmap) override; 69 70 virtual bool isOpaque() override; 71 virtual int width() override; 72 virtual int height() override; 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 virtual void restoreUnclippedLayer(int saveCount, const Paint& paint) override; 79 80 virtual int saveLayer(float left, float top, float right, float bottom, const SkPaint* paint) override; 81 virtual int saveLayerAlpha(float left, float top, float right, float bottom, int alpha) override; 82 virtual int saveUnclippedLayer(int left, int top, int right, int bottom) 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, SkClipOp op) override; 96 virtual bool clipPath(const SkPath* path, SkClipOp op) override; 97 virtual bool replaceClipRect_deprecated(float left, float top, float right, 98 float bottom) override; 99 virtual bool replaceClipPath_deprecated(const SkPath* path) override; 100 101 virtual PaintFilter* getPaintFilter() override; 102 virtual void setPaintFilter(sk_sp<PaintFilter> paintFilter) override; 103 104 virtual SkCanvasState* captureCanvasState() const override; 105 106 virtual void drawColor(int color, SkBlendMode mode) override; 107 virtual void drawPaint(const Paint& paint) override; 108 109 virtual void drawPoint(float x, float y, const Paint& paint) override; 110 virtual void drawPoints(const float* points, int count, const Paint& paint) override; 111 virtual void drawLine(float startX, float startY, float stopX, float stopY, 112 const Paint& paint) override; 113 virtual void drawLines(const float* points, int count, const Paint& paint) override; 114 virtual void drawRect(float left, float top, float right, float bottom, 115 const Paint& paint) override; 116 virtual void drawRegion(const SkRegion& region, const Paint& paint) override; 117 virtual void drawRoundRect(float left, float top, float right, float bottom, float rx, float ry, 118 const Paint& paint) override; 119 120 virtual void drawDoubleRoundRect(const SkRRect& outer, const SkRRect& inner, 121 const Paint& paint) override; 122 123 virtual void drawCircle(float x, float y, float radius, const Paint& paint) override; 124 virtual void drawOval(float left, float top, float right, float bottom, 125 const Paint& paint) override; 126 virtual void drawArc(float left, float top, float right, float bottom, float startAngle, 127 float sweepAngle, bool useCenter, const Paint& paint) override; 128 virtual void drawPath(const SkPath& path, const Paint& paint) override; 129 virtual void drawVertices(const SkVertices*, SkBlendMode, const Paint& paint) override; 130 131 virtual void drawBitmap(Bitmap& bitmap, float left, float top, const Paint* paint) override; 132 virtual void drawBitmap(Bitmap& bitmap, const SkMatrix& matrix, const Paint* paint) override; 133 virtual void drawBitmap(Bitmap& bitmap, float srcLeft, float srcTop, float srcRight, 134 float srcBottom, float dstLeft, float dstTop, float dstRight, 135 float dstBottom, const Paint* paint) override; 136 virtual void drawBitmapMesh(Bitmap& bitmap, int meshWidth, int meshHeight, 137 const float* vertices, const int* colors, 138 const Paint* paint) override; 139 virtual void drawNinePatch(Bitmap& bitmap, const android::Res_png_9patch& chunk, float dstLeft, 140 float dstTop, float dstRight, float dstBottom, 141 const Paint* paint) override; 142 virtual double drawAnimatedImage(AnimatedImageDrawable* imgDrawable) override; 143 144 virtual void drawVectorDrawable(VectorDrawableRoot* vectorDrawable) override; 145 146 virtual void drawRoundRect(uirenderer::CanvasPropertyPrimitive* left, 147 uirenderer::CanvasPropertyPrimitive* top, 148 uirenderer::CanvasPropertyPrimitive* right, 149 uirenderer::CanvasPropertyPrimitive* bottom, 150 uirenderer::CanvasPropertyPrimitive* rx, 151 uirenderer::CanvasPropertyPrimitive* ry, 152 uirenderer::CanvasPropertyPaint* paint) override; 153 virtual void drawCircle(uirenderer::CanvasPropertyPrimitive* x, 154 uirenderer::CanvasPropertyPrimitive* y, 155 uirenderer::CanvasPropertyPrimitive* radius, 156 uirenderer::CanvasPropertyPaint* paint) override; 157 virtual void drawRipple(const uirenderer::skiapipeline::RippleDrawableParams& params) override; 158 159 virtual void drawLayer(uirenderer::DeferredLayerUpdater* layerHandle) override; 160 virtual void drawRenderNode(uirenderer::RenderNode* renderNode) override; 161 virtual void drawPicture(const SkPicture& picture) override; 162 163 protected: 164 SkiaCanvas(); asSkCanvas()165 SkCanvas* asSkCanvas() { return mCanvas; } 166 void reset(SkCanvas* skiaCanvas); drawDrawable(SkDrawable * drawable)167 void drawDrawable(SkDrawable* drawable) { mCanvas->drawDrawable(drawable); } 168 169 virtual void drawGlyphs(ReadGlyphFunc glyphFunc, int count, const Paint& paint, float x, 170 float y, float totalAdvance) override; 171 virtual void drawLayoutOnPath(const minikin::Layout& layout, float hOffset, float vOffset, 172 const Paint& paint, const SkPath& path, size_t start, 173 size_t end) override; 174 175 void onFilterPaint(Paint& paint); 176 filterPaint(const Paint & src)177 Paint filterPaint(const Paint& src) { 178 Paint dst(src); 179 this->onFilterPaint(dst); 180 return dst; 181 } 182 183 // proc(const SkPaint& modifiedPaint) 184 template <typename Proc> 185 void applyLooper(const Paint* paint, Proc proc, void (*preFilter)(SkPaint&) = nullptr) { 186 BlurDrawLooper* looper = paint ? paint->getLooper() : nullptr; 187 Paint pnt = paint ? *paint : Paint(); 188 if (preFilter) { 189 preFilter(pnt); 190 } 191 this->onFilterPaint(pnt); 192 if (looper) { 193 looper->apply(pnt, [&](SkPoint offset, const Paint& modifiedPaint) { 194 mCanvas->save(); 195 mCanvas->translate(offset.fX, offset.fY); 196 proc(modifiedPaint); 197 mCanvas->restore(); 198 }); 199 } else { 200 proc(pnt); 201 } 202 } 203 204 private: 205 struct SaveRec { 206 int saveCount; 207 SaveFlags::Flags saveFlags; 208 size_t clipIndex; 209 }; 210 211 const SaveRec* currentSaveRec() const; 212 void recordPartialSave(SaveFlags::Flags flags); 213 214 template <typename T> 215 void recordClip(const T&, SkClipOp); 216 void applyPersistentClips(size_t clipStartIndex); 217 218 void drawPoints(const float* points, int count, const Paint& paint, SkCanvas::PointMode mode); 219 220 class Clip; 221 222 std::unique_ptr<SkCanvas> mCanvasOwned; // might own a canvas we allocated 223 SkCanvas* mCanvas; // we do NOT own this canvas, it must survive us 224 // unless it is the same as mCanvasOwned.get() 225 std::unique_ptr<SkDeque> mSaveStack; // lazily allocated, tracks partial saves. 226 std::vector<Clip> mClipStack; // tracks persistent clips. 227 sk_sp<PaintFilter> mPaintFilter; 228 }; 229 230 } // namespace android 231