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