1 /* 2 * Copyright 2013 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 "SkDrawLooper.h" 9 #include "SkCanvas.h" 10 #include "SkMatrix.h" 11 #include "SkPaint.h" 12 #include "SkRect.h" 13 14 SK_DEFINE_INST_COUNT(SkDrawLooper) 15 16 bool SkDrawLooper::canComputeFastBounds(const SkPaint& paint) { 17 SkCanvas canvas; 18 19 this->init(&canvas); 20 for (;;) { 21 SkPaint p(paint); 22 if (this->next(&canvas, &p)) { 23 p.setLooper(NULL); 24 if (!p.canComputeFastBounds()) { 25 return false; 26 } 27 } else { 28 break; 29 } 30 } 31 return true; 32 } 33 34 void SkDrawLooper::computeFastBounds(const SkPaint& paint, const SkRect& src, 35 SkRect* dst) { 36 SkCanvas canvas; 37 38 *dst = src; // catch case where there are no loops 39 this->init(&canvas); 40 for (bool firstTime = true;; firstTime = false) { 41 SkPaint p(paint); 42 if (this->next(&canvas, &p)) { 43 SkRect r(src); 44 45 p.setLooper(NULL); 46 p.computeFastBounds(r, &r); 47 canvas.getTotalMatrix().mapRect(&r); 48 49 if (firstTime) { 50 *dst = r; 51 } else { 52 dst->join(r); 53 } 54 } else { 55 break; 56 } 57 } 58 } 59
