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 */ 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
