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 */ 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
