1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
|
/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SkImagePriv_DEFINED
#define SkImagePriv_DEFINED
#include "include/core/SkImage.h"
#include "include/core/SkSurface.h"
#include "include/core/SkTileMode.h"
class SkPixelRef;
enum SkCopyPixelsMode {
kIfMutable_SkCopyPixelsMode, //!< only copy src pixels if they are marked mutable
kAlways_SkCopyPixelsMode, //!< always copy src pixels (even if they are marked immutable)
kNever_SkCopyPixelsMode, //!< never copy src pixels (even if they are marked mutable)
};
// If alloc is non-nullptr, it will be used to allocate the returned SkShader, and MUST outlive
// the SkShader.
sk_sp<SkShader> SkMakeBitmapShader(const SkBitmap& src, SkTileMode, SkTileMode,
const SkSamplingOptions&, const SkMatrix* localMatrix,
SkCopyPixelsMode);
// Convenience function to return a shader that implements the shader+image behavior defined for
// drawImage/Bitmap where the paint's shader is ignored when the bitmap is a color image, but
// properly compose them together when it is an alpha image. This allows the returned paint to
// be assigned to a paint clone without discarding the original behavior.
sk_sp<SkShader> SkMakeBitmapShaderForPaint(const SkPaint& paint, const SkBitmap& src,
SkTileMode, SkTileMode, const SkSamplingOptions&,
const SkMatrix* localMatrix, SkCopyPixelsMode);
/**
* Examines the bitmap to decide if it can share the existing pixelRef, or
* if it needs to make a deep-copy of the pixels.
*
* The bitmap's pixelref will be shared if either the bitmap is marked as
* immutable, or CopyPixelsMode allows it. Shared pixel refs are also
* locked when kLocked_SharedPixelRefMode is specified.
*
* Passing kLocked_SharedPixelRefMode allows the image's peekPixels() method
* to succeed, but it will force any lazy decodes/generators to execute if
* they exist on the pixelref.
*
* It is illegal to call this with a texture-backed bitmap.
*
* If the bitmap's colortype cannot be converted into a corresponding
* SkImageInfo, or the bitmap's pixels cannot be accessed, this will return
* nullptr.
*/
extern SK_SPI sk_sp<SkImage> SkMakeImageFromRasterBitmap(const SkBitmap&, SkCopyPixelsMode);
// Given an image created from SkNewImageFromBitmap, return its pixelref. This
// may be called to see if the surface and the image share the same pixelref,
// in which case the surface may need to perform a copy-on-write.
extern const SkPixelRef* SkBitmapImageGetPixelRef(const SkImage* rasterImage);
#endif
|
