1 /* 2 * Copyright (C) 2013 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 17 #ifndef ANDROID_HWUI_RENDERER_H 18 #define ANDROID_HWUI_RENDERER_H 19 20 #include <SkRegion.h> 21 22 #include <utils/String8.h> 23 24 #include "AssetAtlas.h" 25 #include "SkPaint.h" 26 27 namespace android { 28 29 class Functor; 30 struct Res_png_9patch; 31 32 namespace uirenderer { 33 34 class RenderNode; 35 class Layer; 36 class Matrix4; 37 class SkiaColorFilter; 38 class Patch; 39 40 enum DrawOpMode { 41 kDrawOpMode_Immediate, 42 kDrawOpMode_Defer, 43 kDrawOpMode_Flush 44 }; 45 46 /** 47 * Hwui's abstract version of Canvas. 48 * 49 * Provides methods for frame state operations, as well as the SkCanvas style transform/clip state, 50 * and varied drawing operations. 51 * 52 * Should at some point interact with native SkCanvas. 53 */ 54 class ANDROID_API Renderer { 55 public: 56 virtual ~Renderer() {} 57 58 /** 59 * Safely retrieves the mode from the specified xfermode. If the specified 60 * xfermode is null, the mode is assumed to be SkXfermode::kSrcOver_Mode. 61 */ 62 static inline SkXfermode::Mode getXfermode(SkXfermode* mode) { 63 SkXfermode::Mode resultMode; 64 if (!SkXfermode::AsMode(mode, &resultMode)) { 65 resultMode = SkXfermode::kSrcOver_Mode; 66 } 67 return resultMode; 68 } 69 70 // TODO: move to a method on android:Paint 71 static inline bool paintWillNotDraw(const SkPaint& paint) { 72 return paint.getAlpha() == 0 73 && !paint.getColorFilter() 74 && getXfermode(paint.getXfermode()) == SkXfermode::kSrcOver_Mode; 75 } 76 77 // TODO: move to a method on android:Paint 78 static inline bool paintWillNotDrawText(const SkPaint& paint) { 79 return paint.getAlpha() == 0 80 && paint.getLooper() == NULL 81 && !paint.getColorFilter() 82 && getXfermode(paint.getXfermode()) == SkXfermode::kSrcOver_Mode; 83 } 84 // ---------------------------------------------------------------------------- 85 // Frame state operations 86 // ---------------------------------------------------------------------------- 87 /** 88 * Sets the dimension of the underlying drawing surface. This method must 89 * be called at least once every time the drawing surface changes size. 90 * 91 * @param width The width in pixels of the underlysing surface 92 * @param height The height in pixels of the underlysing surface 93 */ 94 virtual void setViewport(int width, int height) = 0; 95 96 /** 97 * Prepares the renderer to draw a frame. This method must be invoked 98 * at the beginning of each frame. When this method is invoked, the 99 * entire drawing surface is assumed to be redrawn. 100 * 101 * @param opaque If true, the target surface is considered opaque 102 * and will not be cleared. If false, the target surface 103 * will be cleared 104 */ 105 virtual status_t prepare(bool opaque) = 0; 106 107 /** 108 * Prepares the renderer to draw a frame. This method must be invoked 109 * at the beginning of each frame. Only the specified rectangle of the 110 * frame is assumed to be dirty. A clip will automatically be set to 111 * the specified rectangle. 112 * 113 * @param left The left coordinate of the dirty rectangle 114 * @param top The top coordinate of the dirty rectangle 115 * @param right The right coordinate of the dirty rectangle 116 * @param bottom The bottom coordinate of the dirty rectangle 117 * @param opaque If true, the target surface is considered opaque 118 * and will not be cleared. If false, the target surface 119 * will be cleared in the specified dirty rectangle 120 */ 121 virtual status_t prepareDirty(float left, float top, float right, float bottom, 122 bool opaque) = 0; 123 124 /** 125 * Indicates the end of a frame. This method must be invoked whenever 126 * the caller is done rendering a frame. 127 */ 128 virtual void finish() = 0; 129 130 // ---------------------------------------------------------------------------- 131 // Canvas state operations 132 // ---------------------------------------------------------------------------- 133 // Save (layer) 134 virtual int getSaveCount() const = 0; 135 virtual int save(int flags) = 0; 136 virtual void restore() = 0; 137 virtual void restoreToCount(int saveCount) = 0; 138 139 virtual int saveLayer(float left, float top, float right, float bottom, 140 const SkPaint* paint, int flags) = 0; 141 142 int saveLayerAlpha(float left, float top, float right, float bottom, 143 int alpha, int flags) { 144 SkPaint paint; 145 paint.setAlpha(alpha); 146 return saveLayer(left, top, right, bottom, &paint, flags); 147 } 148 149 // Matrix 150 virtual void getMatrix(SkMatrix* outMatrix) const = 0; 151 virtual void translate(float dx, float dy, float dz = 0.0f) = 0; 152 virtual void rotate(float degrees) = 0; 153 virtual void scale(float sx, float sy) = 0; 154 virtual void skew(float sx, float sy) = 0; 155 156 virtual void setMatrix(const SkMatrix& matrix) = 0; 157 virtual void concatMatrix(const SkMatrix& matrix) = 0; 158 159 // clip 160 virtual const Rect& getLocalClipBounds() const = 0; 161 virtual bool quickRejectConservative(float left, float top, 162 float right, float bottom) const = 0; 163 virtual bool clipRect(float left, float top, float right, float bottom, SkRegion::Op op) = 0; 164 virtual bool clipPath(const SkPath* path, SkRegion::Op op) = 0; 165 virtual bool clipRegion(const SkRegion* region, SkRegion::Op op) = 0; 166 167 // Misc - should be implemented with SkPaint inspection 168 virtual void resetPaintFilter() = 0; 169 virtual void setupPaintFilter(int clearBits, int setBits) = 0; 170 171 // ---------------------------------------------------------------------------- 172 // Canvas draw operations 173 // ---------------------------------------------------------------------------- 174 virtual status_t drawColor(int color, SkXfermode::Mode mode) = 0; 175 176 // Bitmap-based 177 virtual status_t drawBitmap(const SkBitmap* bitmap, const SkPaint* paint) = 0; 178 virtual status_t drawBitmap(const SkBitmap* bitmap, float srcLeft, float srcTop, 179 float srcRight, float srcBottom, float dstLeft, float dstTop, 180 float dstRight, float dstBottom, const SkPaint* paint) = 0; 181 virtual status_t drawBitmapData(const SkBitmap* bitmap, const SkPaint* paint) = 0; 182 virtual status_t drawBitmapMesh(const SkBitmap* bitmap, int meshWidth, int meshHeight, 183 const float* vertices, const int* colors, const SkPaint* paint) = 0; 184 virtual status_t drawPatch(const SkBitmap* bitmap, const Res_png_9patch* patch, 185 float left, float top, float right, float bottom, const SkPaint* paint) = 0; 186 187 // Shapes 188 virtual status_t drawRect(float left, float top, float right, float bottom, 189 const SkPaint* paint) = 0; 190 virtual status_t drawRects(const float* rects, int count, const SkPaint* paint) = 0; 191 virtual status_t drawRoundRect(float left, float top, float right, float bottom, 192 float rx, float ry, const SkPaint* paint) = 0; 193 virtual status_t drawCircle(float x, float y, float radius, const SkPaint* paint) = 0; 194 virtual status_t drawOval(float left, float top, float right, float bottom, 195 const SkPaint* paint) = 0; 196 virtual status_t drawArc(float left, float top, float right, float bottom, 197 float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint) = 0; 198 virtual status_t drawPath(const SkPath* path, const SkPaint* paint) = 0; 199 virtual status_t drawLines(const float* points, int count, const SkPaint* paint) = 0; 200 virtual status_t drawPoints(const float* points, int count, const SkPaint* paint) = 0; 201 202 // Text 203 virtual status_t drawText(const char* text, int bytesCount, int count, float x, float y, 204 const float* positions, const SkPaint* paint, float totalAdvance, const Rect& bounds, 205 DrawOpMode drawOpMode = kDrawOpMode_Immediate) = 0; 206 virtual status_t drawTextOnPath(const char* text, int bytesCount, int count, const SkPath* path, 207 float hOffset, float vOffset, const SkPaint* paint) = 0; 208 virtual status_t drawPosText(const char* text, int bytesCount, int count, 209 const float* positions, const SkPaint* paint) = 0; 210 211 // ---------------------------------------------------------------------------- 212 // Canvas draw operations - special 213 // ---------------------------------------------------------------------------- 214 virtual status_t drawLayer(Layer* layer, float x, float y) = 0; 215 virtual status_t drawRenderNode(RenderNode* renderNode, Rect& dirty, 216 int32_t replayFlags) = 0; 217 218 // TODO: rename for consistency 219 virtual status_t callDrawGLFunction(Functor* functor, Rect& dirty) = 0; 220 }; // class Renderer 221 222 }; // namespace uirenderer 223 }; // namespace android 224 225 #endif // ANDROID_HWUI_RENDERER_H 226
