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 "SkDrawable.h"
10 #include "SkThread.h"
11
next_generation_id()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
SkDrawable()24 SkDrawable::SkDrawable() : fGenerationID(0) {}
25
draw_bbox(SkCanvas * canvas,const SkRect & r)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
draw(SkCanvas * canvas)35 void SkDrawable::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
newPictureSnapshot()44 SkPicture* SkDrawable::newPictureSnapshot() {
45 return this->onNewPictureSnapshot();
46 }
47
getGenerationID()48 uint32_t SkDrawable::getGenerationID() {
49 if (0 == fGenerationID) {
50 fGenerationID = next_generation_id();
51 }
52 return fGenerationID;
53 }
54
getBounds()55 SkRect SkDrawable::getBounds() {
56 return this->onGetBounds();
57 }
58
notifyDrawingChanged()59 void SkDrawable::notifyDrawingChanged() {
60 fGenerationID = 0;
61 }
62
63 /////////////////////////////////////////////////////////////////////////////////////////
64
65 #include "SkPictureRecorder.h"
66
onNewPictureSnapshot()67 SkPicture* SkDrawable::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 }
78