SkRecorder.cpp revision 6f09709519b79a1159f3826645f1c5fbc101ee11
1/* 2 * Copyright 2014 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8#include "SkRecorder.h" 9#include "SkPatchUtils.h" 10#include "SkPicture.h" 11 12// SkCanvas will fail in mysterious ways if it doesn't know the real width and height. 13SkRecorder::SkRecorder(SkRecord* record, int width, int height) 14 : SkCanvas(width, height) 15 , fRecord(record) 16 , fSaveLayerCount(0) {} 17 18void SkRecorder::forgetRecord() { 19 fRecord = NULL; 20} 21 22// To make appending to fRecord a little less verbose. 23#define APPEND(T, ...) \ 24 SkNEW_PLACEMENT_ARGS(fRecord->append<SkRecords::T>(), SkRecords::T, (__VA_ARGS__)) 25 26// For methods which must call back into SkCanvas. 27#define INHERITED(method, ...) this->SkCanvas::method(__VA_ARGS__) 28 29// The structs we're creating all copy their constructor arguments. Given the way the SkRecords 30// framework works, sometimes they happen to technically be copied twice, which is fine and elided 31// into a single copy unless the class has a non-trivial copy constructor. For classes with 32// non-trivial copy constructors, we skip the first copy (and its destruction) by wrapping the value 33// with delay_copy(), forcing the argument to be passed by const&. 34// 35// This is used below for SkBitmap, SkPaint, SkPath, and SkRegion, which all have non-trivial copy 36// constructors and destructors. You'll know you've got a good candidate T if you see ~T() show up 37// unexpectedly on a profile of record time. Otherwise don't bother. 38template <typename T> 39class Reference { 40public: 41 Reference(const T& x) : fX(x) {} 42 operator const T&() const { return fX; } 43private: 44 const T& fX; 45}; 46 47template <typename T> 48static Reference<T> delay_copy(const T& x) { return Reference<T>(x); } 49 50// Use copy() only for optional arguments, to be copied if present or skipped if not. 51// (For most types we just pass by value and let copy constructors do their thing.) 52template <typename T> 53T* SkRecorder::copy(const T* src) { 54 if (NULL == src) { 55 return NULL; 56 } 57 return SkNEW_PLACEMENT_ARGS(fRecord->alloc<T>(), T, (*src)); 58} 59 60// This copy() is for arrays. 61// It will work with POD or non-POD, though currently we only use it for POD. 62template <typename T> 63T* SkRecorder::copy(const T src[], size_t count) { 64 if (NULL == src) { 65 return NULL; 66 } 67 T* dst = fRecord->alloc<T>(count); 68 for (size_t i = 0; i < count; i++) { 69 SkNEW_PLACEMENT_ARGS(dst + i, T, (src[i])); 70 } 71 return dst; 72} 73 74// Specialization for copying strings, using memcpy. 75// This measured around 2x faster for copying code points, 76// but I found no corresponding speedup for other arrays. 77template <> 78char* SkRecorder::copy(const char src[], size_t count) { 79 if (NULL == src) { 80 return NULL; 81 } 82 char* dst = fRecord->alloc<char>(count); 83 memcpy(dst, src, count); 84 return dst; 85} 86 87// As above, assuming and copying a terminating \0. 88template <> 89char* SkRecorder::copy(const char* src) { 90 return this->copy(src, strlen(src)+1); 91} 92 93 94void SkRecorder::clear(SkColor color) { 95 APPEND(Clear, color); 96} 97 98void SkRecorder::drawPaint(const SkPaint& paint) { 99 APPEND(DrawPaint, delay_copy(paint)); 100} 101 102void SkRecorder::drawPoints(PointMode mode, 103 size_t count, 104 const SkPoint pts[], 105 const SkPaint& paint) { 106 APPEND(DrawPoints, delay_copy(paint), mode, count, this->copy(pts, count)); 107} 108 109void SkRecorder::drawRect(const SkRect& rect, const SkPaint& paint) { 110 APPEND(DrawRect, delay_copy(paint), rect); 111} 112 113void SkRecorder::drawOval(const SkRect& oval, const SkPaint& paint) { 114 APPEND(DrawOval, delay_copy(paint), oval); 115} 116 117void SkRecorder::drawRRect(const SkRRect& rrect, const SkPaint& paint) { 118 APPEND(DrawRRect, delay_copy(paint), rrect); 119} 120 121void SkRecorder::onDrawDRRect(const SkRRect& outer, const SkRRect& inner, const SkPaint& paint) { 122 APPEND(DrawDRRect, delay_copy(paint), outer, inner); 123} 124 125void SkRecorder::drawPath(const SkPath& path, const SkPaint& paint) { 126 APPEND(DrawPath, delay_copy(paint), delay_copy(path)); 127} 128 129void SkRecorder::drawBitmap(const SkBitmap& bitmap, 130 SkScalar left, 131 SkScalar top, 132 const SkPaint* paint) { 133 APPEND(DrawBitmap, this->copy(paint), delay_copy(bitmap), left, top); 134} 135 136void SkRecorder::drawBitmapRectToRect(const SkBitmap& bitmap, 137 const SkRect* src, 138 const SkRect& dst, 139 const SkPaint* paint, 140 DrawBitmapRectFlags flags) { 141 APPEND(DrawBitmapRectToRect, 142 this->copy(paint), delay_copy(bitmap), this->copy(src), dst, flags); 143} 144 145void SkRecorder::drawBitmapMatrix(const SkBitmap& bitmap, 146 const SkMatrix& matrix, 147 const SkPaint* paint) { 148 APPEND(DrawBitmapMatrix, this->copy(paint), delay_copy(bitmap), matrix); 149} 150 151void SkRecorder::drawBitmapNine(const SkBitmap& bitmap, 152 const SkIRect& center, 153 const SkRect& dst, 154 const SkPaint* paint) { 155 APPEND(DrawBitmapNine, this->copy(paint), delay_copy(bitmap), center, dst); 156} 157 158void SkRecorder::drawSprite(const SkBitmap& bitmap, int left, int top, const SkPaint* paint) { 159 APPEND(DrawSprite, this->copy(paint), delay_copy(bitmap), left, top); 160} 161 162void SkRecorder::onDrawText(const void* text, size_t byteLength, 163 SkScalar x, SkScalar y, const SkPaint& paint) { 164 APPEND(DrawText, 165 delay_copy(paint), this->copy((const char*)text, byteLength), byteLength, x, y); 166} 167 168void SkRecorder::onDrawPosText(const void* text, size_t byteLength, 169 const SkPoint pos[], const SkPaint& paint) { 170 const unsigned points = paint.countText(text, byteLength); 171 APPEND(DrawPosText, 172 delay_copy(paint), 173 this->copy((const char*)text, byteLength), 174 byteLength, 175 this->copy(pos, points)); 176} 177 178void SkRecorder::onDrawPosTextH(const void* text, size_t byteLength, 179 const SkScalar xpos[], SkScalar constY, const SkPaint& paint) { 180 const unsigned points = paint.countText(text, byteLength); 181 APPEND(DrawPosTextH, 182 delay_copy(paint), 183 this->copy((const char*)text, byteLength), 184 byteLength, 185 this->copy(xpos, points), 186 constY); 187} 188 189void SkRecorder::onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path, 190 const SkMatrix* matrix, const SkPaint& paint) { 191 APPEND(DrawTextOnPath, 192 delay_copy(paint), 193 this->copy((const char*)text, byteLength), 194 byteLength, 195 delay_copy(path), 196 this->copy(matrix)); 197} 198 199void SkRecorder::onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y, 200 const SkPaint& paint) { 201 APPEND(DrawTextBlob, delay_copy(paint), blob, x, y); 202} 203 204void SkRecorder::onDrawPicture(const SkPicture* pic, const SkMatrix* matrix, const SkPaint* paint) { 205 APPEND(DrawPicture, this->copy(paint), pic, this->copy(matrix)); 206} 207 208void SkRecorder::drawVertices(VertexMode vmode, 209 int vertexCount, const SkPoint vertices[], 210 const SkPoint texs[], const SkColor colors[], 211 SkXfermode* xmode, 212 const uint16_t indices[], int indexCount, const SkPaint& paint) { 213 APPEND(DrawVertices, delay_copy(paint), 214 vmode, 215 vertexCount, 216 this->copy(vertices, vertexCount), 217 texs ? this->copy(texs, vertexCount) : NULL, 218 colors ? this->copy(colors, vertexCount) : NULL, 219 xmode, 220 this->copy(indices, indexCount), 221 indexCount); 222} 223 224void SkRecorder::onDrawPatch(const SkPoint cubics[12], const SkColor colors[4], 225 const SkPoint texCoords[4], SkXfermode* xmode, const SkPaint& paint) { 226 APPEND(DrawPatch, delay_copy(paint), 227 cubics ? this->copy(cubics, SkPatchUtils::kNumCtrlPts) : NULL, 228 colors ? this->copy(colors, SkPatchUtils::kNumCorners) : NULL, 229 texCoords ? this->copy(texCoords, SkPatchUtils::kNumCorners) : NULL, 230 xmode); 231} 232 233void SkRecorder::willSave() { 234 fSaveIsSaveLayer.push(false); 235 APPEND(Save); 236} 237 238SkCanvas::SaveLayerStrategy SkRecorder::willSaveLayer(const SkRect* bounds, 239 const SkPaint* paint, 240 SkCanvas::SaveFlags flags) { 241 fSaveLayerCount++; 242 fSaveIsSaveLayer.push(true); 243 APPEND(SaveLayer, this->copy(bounds), this->copy(paint), flags); 244 return SkCanvas::kNoLayer_SaveLayerStrategy; 245} 246 247void SkRecorder::didRestore() { 248 SkBool8 saveLayer; 249 fSaveIsSaveLayer.pop(&saveLayer); 250 if (saveLayer) { 251 fSaveLayerCount--; 252 } 253 APPEND(Restore, this->devBounds(), this->getTotalMatrix()); 254} 255 256void SkRecorder::onPushCull(const SkRect& rect) { 257 APPEND(PushCull, rect); 258} 259 260void SkRecorder::onPopCull() { 261 APPEND(PopCull); 262} 263 264void SkRecorder::didConcat(const SkMatrix& matrix) { 265 this->didSetMatrix(this->getTotalMatrix()); 266} 267 268void SkRecorder::didSetMatrix(const SkMatrix& matrix) { 269 SkDEVCODE(if (matrix != this->getTotalMatrix()) { 270 matrix.dump(); 271 this->getTotalMatrix().dump(); 272 SkASSERT(matrix == this->getTotalMatrix()); 273 }) 274 APPEND(SetMatrix, matrix); 275} 276 277void SkRecorder::onClipRect(const SkRect& rect, SkRegion::Op op, ClipEdgeStyle edgeStyle) { 278 INHERITED(onClipRect, rect, op, edgeStyle); 279 APPEND(ClipRect, this->devBounds(), rect, op, edgeStyle == kSoft_ClipEdgeStyle); 280} 281 282void SkRecorder::onClipRRect(const SkRRect& rrect, SkRegion::Op op, ClipEdgeStyle edgeStyle) { 283 INHERITED(updateClipConservativelyUsingBounds, rrect.getBounds(), op, false); 284 APPEND(ClipRRect, this->devBounds(), rrect, op, edgeStyle == kSoft_ClipEdgeStyle); 285} 286 287void SkRecorder::onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle edgeStyle) { 288 INHERITED(updateClipConservativelyUsingBounds, path.getBounds(), op, path.isInverseFillType()); 289 APPEND(ClipPath, this->devBounds(), delay_copy(path), op, edgeStyle == kSoft_ClipEdgeStyle); 290} 291 292void SkRecorder::onClipRegion(const SkRegion& deviceRgn, SkRegion::Op op) { 293 INHERITED(onClipRegion, deviceRgn, op); 294 APPEND(ClipRegion, this->devBounds(), delay_copy(deviceRgn), op); 295} 296 297void SkRecorder::beginCommentGroup(const char* description) { 298 APPEND(BeginCommentGroup, this->copy(description)); 299} 300 301void SkRecorder::addComment(const char* key, const char* value) { 302 APPEND(AddComment, this->copy(key), this->copy(value)); 303} 304 305void SkRecorder::endCommentGroup() { 306 APPEND(EndCommentGroup); 307} 308 309bool SkRecorder::isDrawingToLayer() const { 310 return fSaveLayerCount > 0; 311} 312 313void SkRecorder::drawData(const void* data, size_t length) { 314 APPEND(DrawData, copy((const char*)data), length); 315} 316