SkRecorder.cpp revision 00d5c2c6523321d25b32905ff4822f083a4173ee
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), fRecord(record) {} 15 16void SkRecorder::forgetRecord() { 17 fRecord = NULL; 18} 19 20// To make appending to fRecord a little less verbose. 21#define APPEND(T, ...) \ 22 SkNEW_PLACEMENT_ARGS(fRecord->append<SkRecords::T>(), SkRecords::T, (__VA_ARGS__)) 23 24// For methods which must call back into SkCanvas. 25#define INHERITED(method, ...) this->SkCanvas::method(__VA_ARGS__) 26 27// The structs we're creating all copy their constructor arguments. Given the way the SkRecords 28// framework works, sometimes they happen to technically be copied twice, which is fine and elided 29// into a single copy unless the class has a non-trivial copy constructor. For classes with 30// non-trivial copy constructors, we skip the first copy (and its destruction) by wrapping the value 31// with delay_copy(), forcing the argument to be passed by const&. 32// 33// This is used below for SkBitmap, SkPaint, SkPath, and SkRegion, which all have non-trivial copy 34// constructors and destructors. You'll know you've got a good candidate T if you see ~T() show up 35// unexpectedly on a profile of record time. Otherwise don't bother. 36template <typename T> 37class Reference { 38public: 39 Reference(const T& x) : fX(x) {} 40 operator const T&() const { return fX; } 41private: 42 const T& fX; 43}; 44 45template <typename T> 46static Reference<T> delay_copy(const T& x) { return Reference<T>(x); } 47 48// Use copy() only for optional arguments, to be copied if present or skipped if not. 49// (For most types we just pass by value and let copy constructors do their thing.) 50template <typename T> 51T* SkRecorder::copy(const T* src) { 52 if (NULL == src) { 53 return NULL; 54 } 55 return SkNEW_PLACEMENT_ARGS(fRecord->alloc<T>(), T, (*src)); 56} 57 58// This copy() is for arrays. 59// It will work with POD or non-POD, though currently we only use it for POD. 60template <typename T> 61T* SkRecorder::copy(const T src[], size_t count) { 62 if (NULL == src) { 63 return NULL; 64 } 65 T* dst = fRecord->alloc<T>(count); 66 for (size_t i = 0; i < count; i++) { 67 SkNEW_PLACEMENT_ARGS(dst + i, T, (src[i])); 68 } 69 return dst; 70} 71 72// Specialization for copying strings, using memcpy. 73// This measured around 2x faster for copying code points, 74// but I found no corresponding speedup for other arrays. 75template <> 76char* SkRecorder::copy(const char src[], size_t count) { 77 if (NULL == src) { 78 return NULL; 79 } 80 char* dst = fRecord->alloc<char>(count); 81 memcpy(dst, src, count); 82 return dst; 83} 84 85void SkRecorder::clear(SkColor color) { 86 APPEND(Clear, color); 87} 88 89void SkRecorder::drawPaint(const SkPaint& paint) { 90 APPEND(DrawPaint, delay_copy(paint)); 91} 92 93void SkRecorder::drawPoints(PointMode mode, 94 size_t count, 95 const SkPoint pts[], 96 const SkPaint& paint) { 97 APPEND(DrawPoints, delay_copy(paint), mode, count, this->copy(pts, count)); 98} 99 100void SkRecorder::drawRect(const SkRect& rect, const SkPaint& paint) { 101 APPEND(DrawRect, delay_copy(paint), rect); 102} 103 104void SkRecorder::drawOval(const SkRect& oval, const SkPaint& paint) { 105 APPEND(DrawOval, delay_copy(paint), oval); 106} 107 108void SkRecorder::drawRRect(const SkRRect& rrect, const SkPaint& paint) { 109 APPEND(DrawRRect, delay_copy(paint), rrect); 110} 111 112void SkRecorder::onDrawDRRect(const SkRRect& outer, const SkRRect& inner, const SkPaint& paint) { 113 APPEND(DrawDRRect, delay_copy(paint), outer, inner); 114} 115 116void SkRecorder::drawPath(const SkPath& path, const SkPaint& paint) { 117 APPEND(DrawPath, delay_copy(paint), delay_copy(path)); 118} 119 120void SkRecorder::drawBitmap(const SkBitmap& bitmap, 121 SkScalar left, 122 SkScalar top, 123 const SkPaint* paint) { 124 APPEND(DrawBitmap, this->copy(paint), delay_copy(bitmap), left, top); 125} 126 127void SkRecorder::drawBitmapRectToRect(const SkBitmap& bitmap, 128 const SkRect* src, 129 const SkRect& dst, 130 const SkPaint* paint, 131 DrawBitmapRectFlags flags) { 132 APPEND(DrawBitmapRectToRect, 133 this->copy(paint), delay_copy(bitmap), this->copy(src), dst, flags); 134} 135 136void SkRecorder::drawBitmapMatrix(const SkBitmap& bitmap, 137 const SkMatrix& matrix, 138 const SkPaint* paint) { 139 APPEND(DrawBitmapMatrix, this->copy(paint), delay_copy(bitmap), matrix); 140} 141 142void SkRecorder::drawBitmapNine(const SkBitmap& bitmap, 143 const SkIRect& center, 144 const SkRect& dst, 145 const SkPaint* paint) { 146 APPEND(DrawBitmapNine, this->copy(paint), delay_copy(bitmap), center, dst); 147} 148 149void SkRecorder::drawSprite(const SkBitmap& bitmap, int left, int top, const SkPaint* paint) { 150 APPEND(DrawSprite, this->copy(paint), delay_copy(bitmap), left, top); 151} 152 153void SkRecorder::onDrawText(const void* text, size_t byteLength, 154 SkScalar x, SkScalar y, const SkPaint& paint) { 155 APPEND(DrawText, 156 delay_copy(paint), this->copy((const char*)text, byteLength), byteLength, x, y); 157} 158 159void SkRecorder::onDrawPosText(const void* text, size_t byteLength, 160 const SkPoint pos[], const SkPaint& paint) { 161 const unsigned points = paint.countText(text, byteLength); 162 APPEND(DrawPosText, 163 delay_copy(paint), 164 this->copy((const char*)text, byteLength), 165 byteLength, 166 this->copy(pos, points)); 167} 168 169void SkRecorder::onDrawPosTextH(const void* text, size_t byteLength, 170 const SkScalar xpos[], SkScalar constY, const SkPaint& paint) { 171 const unsigned points = paint.countText(text, byteLength); 172 APPEND(DrawPosTextH, 173 delay_copy(paint), 174 this->copy((const char*)text, byteLength), 175 byteLength, 176 this->copy(xpos, points), 177 constY); 178} 179 180void SkRecorder::onDrawTextOnPath(const void* text, size_t byteLength, const SkPath& path, 181 const SkMatrix* matrix, const SkPaint& paint) { 182 APPEND(DrawTextOnPath, 183 delay_copy(paint), 184 this->copy((const char*)text, byteLength), 185 byteLength, 186 delay_copy(path), 187 this->copy(matrix)); 188} 189 190void SkRecorder::onDrawTextBlob(const SkTextBlob* blob, SkScalar x, SkScalar y, 191 const SkPaint& paint) { 192 APPEND(DrawTextBlob, delay_copy(paint), blob, x, y); 193} 194 195void SkRecorder::onDrawPicture(const SkPicture* pic, const SkMatrix* matrix, const SkPaint* paint) { 196 APPEND(DrawPicture, this->copy(paint), pic, this->copy(matrix)); 197} 198 199void SkRecorder::drawVertices(VertexMode vmode, 200 int vertexCount, const SkPoint vertices[], 201 const SkPoint texs[], const SkColor colors[], 202 SkXfermode* xmode, 203 const uint16_t indices[], int indexCount, const SkPaint& paint) { 204 APPEND(DrawVertices, delay_copy(paint), 205 vmode, 206 vertexCount, 207 this->copy(vertices, vertexCount), 208 texs ? this->copy(texs, vertexCount) : NULL, 209 colors ? this->copy(colors, vertexCount) : NULL, 210 xmode, 211 this->copy(indices, indexCount), 212 indexCount); 213} 214 215void SkRecorder::onDrawPatch(const SkPoint cubics[12], const SkColor colors[4], 216 const SkPoint texCoords[4], SkXfermode* xmode, const SkPaint& paint) { 217 APPEND(DrawPatch, delay_copy(paint), 218 cubics ? this->copy(cubics, SkPatchUtils::kNumCtrlPts) : NULL, 219 colors ? this->copy(colors, SkPatchUtils::kNumCorners) : NULL, 220 texCoords ? this->copy(texCoords, SkPatchUtils::kNumCorners) : NULL, 221 xmode); 222} 223 224void SkRecorder::willSave() { 225 APPEND(Save); 226} 227 228SkCanvas::SaveLayerStrategy SkRecorder::willSaveLayer(const SkRect* bounds, 229 const SkPaint* paint, 230 SkCanvas::SaveFlags flags) { 231 APPEND(SaveLayer, this->copy(bounds), this->copy(paint), flags); 232 return SkCanvas::kNoLayer_SaveLayerStrategy; 233} 234 235void SkRecorder::didRestore() { 236 APPEND(Restore, this->devBounds(), this->getTotalMatrix()); 237} 238 239void SkRecorder::onPushCull(const SkRect& rect) { 240 APPEND(PushCull, rect); 241} 242 243void SkRecorder::onPopCull() { 244 APPEND(PopCull); 245} 246 247void SkRecorder::didConcat(const SkMatrix& matrix) { 248 this->didSetMatrix(this->getTotalMatrix()); 249} 250 251void SkRecorder::didSetMatrix(const SkMatrix& matrix) { 252 SkDEVCODE(if (matrix != this->getTotalMatrix()) { 253 matrix.dump(); 254 this->getTotalMatrix().dump(); 255 SkASSERT(matrix == this->getTotalMatrix()); 256 }) 257 APPEND(SetMatrix, matrix); 258} 259 260void SkRecorder::onClipRect(const SkRect& rect, SkRegion::Op op, ClipEdgeStyle edgeStyle) { 261 INHERITED(onClipRect, rect, op, edgeStyle); 262 APPEND(ClipRect, this->devBounds(), rect, op, edgeStyle == kSoft_ClipEdgeStyle); 263} 264 265void SkRecorder::onClipRRect(const SkRRect& rrect, SkRegion::Op op, ClipEdgeStyle edgeStyle) { 266 INHERITED(updateClipConservativelyUsingBounds, rrect.getBounds(), op, false); 267 APPEND(ClipRRect, this->devBounds(), rrect, op, edgeStyle == kSoft_ClipEdgeStyle); 268} 269 270void SkRecorder::onClipPath(const SkPath& path, SkRegion::Op op, ClipEdgeStyle edgeStyle) { 271 INHERITED(updateClipConservativelyUsingBounds, path.getBounds(), op, path.isInverseFillType()); 272 APPEND(ClipPath, this->devBounds(), delay_copy(path), op, edgeStyle == kSoft_ClipEdgeStyle); 273} 274 275void SkRecorder::onClipRegion(const SkRegion& deviceRgn, SkRegion::Op op) { 276 INHERITED(onClipRegion, deviceRgn, op); 277 APPEND(ClipRegion, this->devBounds(), delay_copy(deviceRgn), op); 278} 279