1 /* 2 * Copyright 2017 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 #ifndef SkAutoBlitterChoose_DEFINED 9 #define SkAutoBlitterChoose_DEFINED 10 11 #include "SkArenaAlloc.h" 12 #include "SkBlitter.h" 13 #include "SkDraw.h" 14 #include "SkMacros.h" 15 16 class SkMatrix; 17 class SkPaint; 18 class SkPixmap; 19 20 class SkAutoBlitterChoose : SkNoncopyable { 21 public: 22 SkAutoBlitterChoose() {} 23 SkAutoBlitterChoose(const SkDraw& draw, const SkMatrix* matrix, const SkPaint& paint, 24 bool drawCoverage = false) { 25 this->choose(draw, matrix, paint, drawCoverage); 26 } 27 28 SkBlitter* operator->() { return fBlitter; } 29 SkBlitter* get() const { return fBlitter; } 30 31 SkBlitter* choose(const SkDraw& draw, const SkMatrix* matrix, const SkPaint& paint, 32 bool drawCoverage = false) { 33 SkASSERT(!fBlitter); 34 if (!matrix) { 35 matrix = draw.fMatrix; 36 } 37 fBlitter = SkBlitter::Choose(draw.fDst, *matrix, paint, &fAlloc, drawCoverage); 38 39 if (draw.fCoverage) { 40 // hmm, why can't choose ignore the paint if drawCoverage is true? 41 SkBlitter* coverageBlitter = SkBlitter::Choose(*draw.fCoverage, *matrix, SkPaint(), 42 &fAlloc, true); 43 fBlitter = fAlloc.make<SkPairBlitter>(fBlitter, coverageBlitter); 44 } 45 return fBlitter; 46 } 47 48 private: 49 // Owned by fAlloc, which will handle the delete. 50 SkBlitter* fBlitter = nullptr; 51 52 SkSTArenaAlloc<kSkBlitterContextSize> fAlloc; 53 }; 54 #define SkAutoBlitterChoose(...) SK_REQUIRE_LOCAL_VAR(SkAutoBlitterChoose) 55 56 #endif 57
