commit-bot@chromium.org | 8b79028 | 2013-05-24 14:57:53 +0000 | [diff] [blame^] | 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 | this->init(&canvas); |
| 39 | for (bool firstTime = true;; firstTime = false) { |
| 40 | SkPaint p(paint); |
| 41 | if (this->next(&canvas, &p)) { |
| 42 | SkRect r(src); |
| 43 | |
| 44 | p.setLooper(NULL); |
| 45 | p.computeFastBounds(r, &r); |
| 46 | canvas.getTotalMatrix().mapRect(&r); |
| 47 | |
| 48 | if (firstTime) { |
| 49 | *dst = r; |
| 50 | } else { |
| 51 | dst->join(r); |
| 52 | } |
| 53 | } else { |
| 54 | break; |
| 55 | } |
| 56 | } |
| 57 | } |