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| 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 "SkCanvas.h" |
| 9 #include "SkCanvasDrawable.h" |
| 10 #include "SkThread.h" |
| 11 |
| 12 static int32_t next_generation_id() { |
| 13 static int32_t gCanvasDrawableGenerationID; |
| 14 |
| 15 // do a loop in case our global wraps around, as we never want to |
| 16 // return a 0 |
| 17 int32_t genID; |
| 18 do { |
| 19 genID = sk_atomic_inc(&gCanvasDrawableGenerationID) + 1; |
| 20 } while (0 == genID); |
| 21 return genID; |
| 22 } |
| 23 |
| 24 SkCanvasDrawable::SkCanvasDrawable() : fGenerationID(0) {} |
| 25 |
| 26 static void draw_bbox(SkCanvas* canvas, const SkRect& r) { |
| 27 SkPaint paint; |
| 28 paint.setStyle(SkPaint::kStroke_Style); |
| 29 paint.setColor(0xFFFF7088); |
| 30 canvas->drawRect(r, paint); |
| 31 canvas->drawLine(r.left(), r.top(), r.right(), r.bottom(), paint); |
| 32 canvas->drawLine(r.left(), r.bottom(), r.right(), r.top(), paint); |
| 33 } |
| 34 |
| 35 void SkCanvasDrawable::draw(SkCanvas* canvas) { |
| 36 SkAutoCanvasRestore acr(canvas, true); |
| 37 this->onDraw(canvas); |
| 38 |
| 39 if (false) { |
| 40 draw_bbox(canvas, this->getBounds()); |
| 41 } |
| 42 } |
| 43 |
| 44 SkPicture* SkCanvasDrawable::newPictureSnapshot() { |
| 45 return this->onNewPictureSnapshot(); |
| 46 } |
| 47 |
| 48 uint32_t SkCanvasDrawable::getGenerationID() { |
| 49 if (0 == fGenerationID) { |
| 50 fGenerationID = next_generation_id(); |
| 51 } |
| 52 return fGenerationID; |
| 53 } |
| 54 |
| 55 SkRect SkCanvasDrawable::getBounds() { |
| 56 return this->onGetBounds(); |
| 57 } |
| 58 |
| 59 void SkCanvasDrawable::notifyDrawingChanged() { |
| 60 fGenerationID = 0; |
| 61 } |
| 62 |
| 63 ////////////////////////////////////////////////////////////////////////////////
///////// |
| 64 |
| 65 #include "SkPictureRecorder.h" |
| 66 |
| 67 SkPicture* SkCanvasDrawable::onNewPictureSnapshot() { |
| 68 SkPictureRecorder recorder; |
| 69 |
| 70 const SkRect bounds = this->getBounds(); |
| 71 SkCanvas* canvas = recorder.beginRecording(bounds, NULL, 0); |
| 72 this->draw(canvas); |
| 73 if (false) { |
| 74 draw_bbox(canvas, bounds); |
| 75 } |
| 76 return recorder.endRecording(); |
| 77 } |
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