1 /*
2 * Copyright 2012 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 "SkImage_Base.h"
9 #include "SkImagePriv.h"
10 #include "SkPicture.h"
11
12 class SkImage_Picture : public SkImage_Base {
13 public:
14 SkImage_Picture(SkPicture*);
15 virtual ~SkImage_Picture();
16
17 virtual void onDraw(SkCanvas*, SkScalar, SkScalar, const SkPaint*) SK_OVERRIDE;
18
19 private:
20 SkPicture* fPicture;
21
22 typedef SkImage_Base INHERITED;
23 };
24
25 ///////////////////////////////////////////////////////////////////////////////
26
SkImage_Picture(SkPicture * pict)27 SkImage_Picture::SkImage_Picture(SkPicture* pict) : INHERITED(pict->width(), pict->height()) {
28 pict->endRecording();
29 pict->ref();
30 fPicture = pict;
31 }
32
~SkImage_Picture()33 SkImage_Picture::~SkImage_Picture() {
34 fPicture->unref();
35 }
36
onDraw(SkCanvas * canvas,SkScalar x,SkScalar y,const SkPaint * paint)37 void SkImage_Picture::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y,
38 const SkPaint* paint) {
39 SkImagePrivDrawPicture(canvas, fPicture, x, y, paint);
40 }
41
SkNewImageFromPicture(const SkPicture * srcPicture)42 SkImage* SkNewImageFromPicture(const SkPicture* srcPicture) {
43 /**
44 * We want to snapshot the playback status of the picture, w/o affecting
45 * its ability to continue recording (if needed).
46 *
47 * Optimally this will shared as much data/buffers as it can with
48 * srcPicture, and srcPicture will perform a copy-on-write as needed if it
49 * needs to mutate them later on.
50 */
51 SkAutoTUnref<SkPicture> playback(SkNEW_ARGS(SkPicture, (*srcPicture)));
52
53 return SkNEW_ARGS(SkImage_Picture, (playback));
54 }
55