1
2 /*
3 * Copyright 2011 Google Inc.
4 *
5 * Use of this source code is governed by a BSD-style license that can be
6 * found in the LICENSE file.
7 */
8 #ifndef SkCGUtils_DEFINED
9 #define SkCGUtils_DEFINED
10
11 #include "SkSize.h"
12 #include "SkImageInfo.h"
13
14 #ifdef SK_BUILD_FOR_MAC
15 #include <ApplicationServices/ApplicationServices.h>
16 #endif
17
18 #ifdef SK_BUILD_FOR_IOS
19 #include <CoreGraphics/CoreGraphics.h>
20 #endif
21
22 class SkBitmap;
23 class SkData;
24 class SkStream;
25
26 /**
27 * Given a CGImage, allocate an SkBitmap and copy the image's pixels into it. If scaleToFit is not
28 * null, use it to determine the size of the bitmap, and scale the image to fill the bitmap.
29 * Otherwise use the image's width/height.
30 *
31 * On failure, return false, and leave bitmap unchanged.
32 */
33 SK_API bool SkCreateBitmapFromCGImage(SkBitmap* dst, CGImageRef src, SkISize* scaleToFit = NULL);
34
35 /**
36 * Copy the pixels from src into the memory specified by info/rowBytes/dstPixels. On failure,
37 * return false (e.g. ImageInfo incompatible with src).
38 */
39 SK_API bool SkCopyPixelsFromCGImage(const SkImageInfo& info, size_t rowBytes, void* dstPixels,
40 CGImageRef src);
41
42 /**
43 * Create an imageref from the specified bitmap using the specified colorspace.
44 * If space is NULL, then CGColorSpaceCreateDeviceRGB() is used.
45 */
46 SK_API CGImageRef SkCreateCGImageRefWithColorspace(const SkBitmap& bm,
47 CGColorSpaceRef space);
48
49 /**
50 * Create an imageref from the specified bitmap using the colorspace returned
51 * by CGColorSpaceCreateDeviceRGB()
52 */
SkCreateCGImageRef(const SkBitmap & bm)53 static inline CGImageRef SkCreateCGImageRef(const SkBitmap& bm) {
54 return SkCreateCGImageRefWithColorspace(bm, NULL);
55 }
56
57 /**
58 * Draw the bitmap into the specified CG context. The bitmap will be converted
59 * to a CGImage using the generic RGB colorspace. (x,y) specifies the position
60 * of the top-left corner of the bitmap. The bitmap is converted using the
61 * colorspace returned by CGColorSpaceCreateDeviceRGB()
62 */
63 void SkCGDrawBitmap(CGContextRef, const SkBitmap&, float x, float y);
64
65 bool SkPDFDocumentToBitmap(SkStream* stream, SkBitmap* output);
66
67 /**
68 * Return a provider that wraps the specified stream. It will become an
69 * owner of the stream, so the caller must still manage its ownership.
70 *
71 * To hand-off ownership of the stream to the provider, the caller must do
72 * something like the following:
73 *
74 * SkStream* stream = new ...;
75 * CGDataProviderRef provider = SkStreamToDataProvider(stream);
76 * stream->unref();
77 *
78 * Now when the provider is finally deleted, it will delete the stream.
79 */
80 CGDataProviderRef SkCreateDataProviderFromStream(SkStream*);
81
82 CGDataProviderRef SkCreateDataProviderFromData(SkData*);
83
84 #endif
85