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 #if defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS)
15
16 #ifdef SK_BUILD_FOR_MAC
17 #include <ApplicationServices/ApplicationServices.h>
18 #endif
19
20 #ifdef SK_BUILD_FOR_IOS
21 #include <CoreGraphics/CoreGraphics.h>
22 #endif
23
24 class SkBitmap;
25 class SkData;
26 class SkStream;
27
28 /**
29 * Given a CGImage, allocate an SkBitmap and copy the image's pixels into it. If scaleToFit is not
30 * null, use it to determine the size of the bitmap, and scale the image to fill the bitmap.
31 * Otherwise use the image's width/height.
32 *
33 * On failure, return false, and leave bitmap unchanged.
34 */
35 SK_API bool SkCreateBitmapFromCGImage(SkBitmap* dst, CGImageRef src, SkISize* scaleToFit = NULL);
36
37 /**
38 * Copy the pixels from src into the memory specified by info/rowBytes/dstPixels. On failure,
39 * return false (e.g. ImageInfo incompatible with src).
40 */
41 SK_API bool SkCopyPixelsFromCGImage(const SkImageInfo& info, size_t rowBytes, void* dstPixels,
42 CGImageRef src);
43
44 /**
45 * Create an imageref from the specified bitmap using the specified colorspace.
46 * If space is NULL, then CGColorSpaceCreateDeviceRGB() is used.
47 */
48 SK_API CGImageRef SkCreateCGImageRefWithColorspace(const SkBitmap& bm,
49 CGColorSpaceRef space);
50
51 /**
52 * Create an imageref from the specified bitmap using the colorspace returned
53 * by CGColorSpaceCreateDeviceRGB()
54 */
SkCreateCGImageRef(const SkBitmap & bm)55 static inline CGImageRef SkCreateCGImageRef(const SkBitmap& bm) {
56 return SkCreateCGImageRefWithColorspace(bm, NULL);
57 }
58
59 /**
60 * Draw the bitmap into the specified CG context. The bitmap will be converted
61 * to a CGImage using the generic RGB colorspace. (x,y) specifies the position
62 * of the top-left corner of the bitmap. The bitmap is converted using the
63 * colorspace returned by CGColorSpaceCreateDeviceRGB()
64 */
65 void SkCGDrawBitmap(CGContextRef, const SkBitmap&, float x, float y);
66
67 /**
68 * Create an SkBitmap drawing of the encoded PDF document, returning true on
69 * success. Deletes the stream when finished.
70 */
71 bool SkPDFDocumentToBitmap(SkStream* stream, SkBitmap* output);
72
73 /**
74 * Return a provider that wraps the specified stream. It will become the only
75 * owner of the stream, so the caller must stop referring to the stream.
76 *
77 * When the provider is finally deleted, it will delete the stream.
78 */
79 CGDataProviderRef SkCreateDataProviderFromStream(SkStream*);
80
81 CGDataProviderRef SkCreateDataProviderFromData(SkData*);
82
83 #endif // defined(SK_BUILD_FOR_MAC) || defined(SK_BUILD_FOR_IOS)
84 #endif // SkCGUtils_DEFINED
85