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1 /* | 1 /* |
2 * Copyright 2012 Google Inc. | 2 * Copyright 2012 Google Inc. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license that can be | 4 * Use of this source code is governed by a BSD-style license that can be |
5 * found in the LICENSE file. | 5 * found in the LICENSE file. |
6 */ | 6 */ |
7 | 7 |
8 #ifndef SkImagePriv_DEFINED | 8 #ifndef SkImagePriv_DEFINED |
9 #define SkImagePriv_DEFINED | 9 #define SkImagePriv_DEFINED |
10 | 10 |
11 #include "SkBitmap.h" | 11 #include "SkBitmap.h" |
12 #include "SkImage.h" | 12 #include "SkImage.h" |
13 | 13 |
14 class SkPicture; | 14 class SkPicture; |
15 | 15 |
16 extern SkBitmap::Config SkImageInfoToBitmapConfig(const SkImageInfo&); | 16 extern SkBitmap::Config SkImageInfoToBitmapConfig(const SkImageInfo&); |
17 | 17 |
18 extern int SkImageBytesPerPixel(SkColorType); | |
19 | |
20 extern bool SkBitmapToImageInfo(const SkBitmap&, SkImageInfo*); | |
21 | |
22 // Call this if you explicitly want to use/share this pixelRef in the image | 18 // Call this if you explicitly want to use/share this pixelRef in the image |
23 extern SkImage* SkNewImageFromPixelRef(const SkImageInfo&, SkPixelRef*, | 19 extern SkImage* SkNewImageFromPixelRef(const SkImageInfo&, SkPixelRef*, |
24 size_t rowBytes); | 20 size_t rowBytes); |
25 | 21 |
26 /** | 22 /** |
27 * Examines the bitmap to decide if it can share the existing pixelRef, or | 23 * Examines the bitmap to decide if it can share the existing pixelRef, or |
28 * if it needs to make a deep-copy of the pixels. The bitmap's pixelref will | 24 * if it needs to make a deep-copy of the pixels. The bitmap's pixelref will |
29 * be shared if either the bitmap is marked as immutable, or canSharePixelRef | 25 * be shared if either the bitmap is marked as immutable, or canSharePixelRef |
30 * is true. | 26 * is true. |
31 * | 27 * |
32 * If the bitmap's config cannot be converted into a corresponding | 28 * If the bitmap's config cannot be converted into a corresponding |
33 * SkImageInfo, or the bitmap's pixels cannot be accessed, this will return | 29 * SkImageInfo, or the bitmap's pixels cannot be accessed, this will return |
34 * NULL. | 30 * NULL. |
35 */ | 31 */ |
36 extern SkImage* SkNewImageFromBitmap(const SkBitmap&, bool canSharePixelRef); | 32 extern SkImage* SkNewImageFromBitmap(const SkBitmap&, bool canSharePixelRef); |
37 | 33 |
38 extern void SkImagePrivDrawPicture(SkCanvas*, SkPicture*, | 34 extern void SkImagePrivDrawPicture(SkCanvas*, SkPicture*, |
39 SkScalar x, SkScalar y, const SkPaint*); | 35 SkScalar x, SkScalar y, const SkPaint*); |
40 | 36 |
41 extern void SkImagePrivDrawPicture(SkCanvas*, SkPicture*, | 37 extern void SkImagePrivDrawPicture(SkCanvas*, SkPicture*, |
42 const SkRect*, const SkRect&, const SkPaint*)
; | 38 const SkRect*, const SkRect&, const SkPaint*)
; |
43 | 39 |
44 /** | 40 /** |
45 * Return an SkImage whose contents are those of the specified picture. Note: | 41 * Return an SkImage whose contents are those of the specified picture. Note: |
46 * The picture itself is unmodified, and may continue to be used for recording | 42 * The picture itself is unmodified, and may continue to be used for recording |
47 */ | 43 */ |
48 extern SkImage* SkNewImageFromPicture(const SkPicture*); | 44 extern SkImage* SkNewImageFromPicture(const SkPicture*); |
49 | 45 |
50 static inline size_t SkImageMinRowBytes(const SkImageInfo& info) { | 46 static inline size_t SkImageMinRowBytes(const SkImageInfo& info) { |
51 size_t rb = info.fWidth * SkImageBytesPerPixel(info.fColorType); | 47 return SkAlign4(info.minRowBytes()); |
52 return SkAlign4(rb); | |
53 } | 48 } |
54 | 49 |
55 // Given an image created from SkNewImageFromBitmap, return its pixelref. This | 50 // Given an image created from SkNewImageFromBitmap, return its pixelref. This |
56 // may be called to see if the surface and the image share the same pixelref, | 51 // may be called to see if the surface and the image share the same pixelref, |
57 // in which case the surface may need to perform a copy-on-write. | 52 // in which case the surface may need to perform a copy-on-write. |
58 extern SkPixelRef* SkBitmapImageGetPixelRef(SkImage* rasterImage); | 53 extern SkPixelRef* SkBitmapImageGetPixelRef(SkImage* rasterImage); |
59 | 54 |
60 // Given an image created with NewPicture, return its SkPicture. | 55 // Given an image created with NewPicture, return its SkPicture. |
61 extern SkPicture* SkPictureImageGetPicture(SkImage* pictureImage); | 56 extern SkPicture* SkPictureImageGetPicture(SkImage* pictureImage); |
62 | 57 |
63 // Given an image created with NewTexture, return its GrTexture. This | 58 // Given an image created with NewTexture, return its GrTexture. This |
64 // may be called to see if the surface and the image share the same GrTexture, | 59 // may be called to see if the surface and the image share the same GrTexture, |
65 // in which case the surface may need to perform a copy-on-write. | 60 // in which case the surface may need to perform a copy-on-write. |
66 extern GrTexture* SkTextureImageGetTexture(SkImage* textureImage); | 61 extern GrTexture* SkTextureImageGetTexture(SkImage* textureImage); |
67 | 62 |
68 // Update the texture wrapped by an image created with NewTexture. This | 63 // Update the texture wrapped by an image created with NewTexture. This |
69 // is called when a surface and image share the same GrTexture and the | 64 // is called when a surface and image share the same GrTexture and the |
70 // surface needs to perform a copy-on-write | 65 // surface needs to perform a copy-on-write |
71 extern void SkTextureImageSetTexture(SkImage* image, GrTexture* texture); | 66 extern void SkTextureImageSetTexture(SkImage* image, GrTexture* texture); |
72 | 67 |
73 #endif | 68 #endif |
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