src/third_party/skia/src/image/SkImage_Picture.cpp

   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     virtual void onDrawRectToRect(SkCanvas*, const SkRect*, const SkRect&, const SkPaint*) SK_OVERRIDE;
  19
  20     SkPicture* getPicture() { return fPicture; }
  21
  22 private:
  23     SkPicture*  fPicture;
  24
  25     typedef SkImage_Base INHERITED;
  26 };
  27
  28 ///////////////////////////////////////////////////////////////////////////////
  29
  30 SkImage_Picture::SkImage_Picture(SkPicture* pict) : INHERITED(pict->width(), pict->height()) {
  31     pict->endRecording();
  32     pict->ref();
  33     fPicture = pict;
  34 }
  35
  36 SkImage_Picture::~SkImage_Picture() {
  37     fPicture->unref();
  38 }
  39
  40 void SkImage_Picture::onDraw(SkCanvas* canvas, SkScalar x, SkScalar y,
  41                              const SkPaint* paint) {
  42     SkImagePrivDrawPicture(canvas, fPicture, x, y, paint);
  43 }
  44
  45 void SkImage_Picture::onDrawRectToRect(SkCanvas* canvas, const SkRect* src, const SkRect& dst,
  46                              const SkPaint* paint) {
  47     SkImagePrivDrawPicture(canvas, fPicture, src, dst, paint);
  48 }
  49
  50 SkImage* SkNewImageFromPicture(const SkPicture* srcPicture) {
  51     /**
  52      *  We want to snapshot the playback status of the picture, w/o affecting
  53      *  its ability to continue recording (if needed).
  54      *
  55      *  Optimally this will shared as much data/buffers as it can with
  56      *  srcPicture, and srcPicture will perform a copy-on-write as needed if it
  57      *  needs to mutate them later on.
  58      */
  59     SkAutoTUnref<SkPicture> playback(SkNEW_ARGS(SkPicture, (*srcPicture)));
  60
  61     return SkNEW_ARGS(SkImage_Picture, (playback));
  62 }
  63
  64 SkPicture* SkPictureImageGetPicture(SkImage* pictureImage) {
  65     return static_cast<SkImage_Picture*>(pictureImage)->getPicture();
  66 }