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#ifndef SkImagePriv_DEFINED
9#define SkImagePriv_DEFINED
10
11#include "SkBitmap.h"
12#include "SkImage.h"
13
14class SkPicture;
15
16extern SkBitmap::Config SkImageInfoToBitmapConfig(const SkImageInfo&);
17
18// Call this if you explicitly want to use/share this pixelRef in the image
19extern SkImage* SkNewImageFromPixelRef(const SkImageInfo&, SkPixelRef*,
20                                       size_t rowBytes);
21
22/**
23 *  Examines the bitmap to decide if it can share the existing pixelRef, or
24 *  if it needs to make a deep-copy of the pixels. The bitmap's pixelref will
25 *  be shared if either the bitmap is marked as immutable, or canSharePixelRef
26 *  is true.
27 *
28 *  If the bitmap's config cannot be converted into a corresponding
29 *  SkImageInfo, or the bitmap's pixels cannot be accessed, this will return
30 *  NULL.
31 */
32extern SkImage* SkNewImageFromBitmap(const SkBitmap&, bool canSharePixelRef);
33
34extern void SkImagePrivDrawPicture(SkCanvas*, SkPicture*,
35                                   SkScalar x, SkScalar y, const SkPaint*);
36
37extern void SkImagePrivDrawPicture(SkCanvas*, SkPicture*,
38                                   const SkRect*, const SkRect&, const SkPaint*);
39
40/**
41 *  Return an SkImage whose contents are those of the specified picture. Note:
42 *  The picture itself is unmodified, and may continue to be used for recording
43 */
44extern SkImage* SkNewImageFromPicture(const SkPicture*);
45
46static inline size_t SkImageMinRowBytes(const SkImageInfo& info) {
47    return SkAlign4(info.minRowBytes());
48}
49
50// Given an image created from SkNewImageFromBitmap, return its pixelref. This
51// may be called to see if the surface and the image share the same pixelref,
52// in which case the surface may need to perform a copy-on-write.
53extern SkPixelRef* SkBitmapImageGetPixelRef(SkImage* rasterImage);
54
55// Given an image created with NewPicture, return its SkPicture.
56extern SkPicture* SkPictureImageGetPicture(SkImage* pictureImage);
57
58// Given an image created with NewTexture, return its GrTexture. This
59// may be called to see if the surface and the image share the same GrTexture,
60// in which case the surface may need to perform a copy-on-write.
61extern GrTexture* SkTextureImageGetTexture(SkImage* textureImage);
62
63// Update the texture wrapped by an image created with NewTexture. This
64// is called when a surface and image share the same GrTexture and the
65// surface needs to perform a copy-on-write
66extern void SkTextureImageSetTexture(SkImage* image, GrTexture* texture);
67
68#endif
69