1 /* 2 * Copyright 2010 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #import <CoreGraphics/CoreGraphics.h> 9 #include <CoreGraphics/CGColorSpace.h> 10 #import <UIKit/UIKit.h> 11 12 #include "SkImageDecoder.h" 13 #include "SkImageEncoder.h" 14 #include "SkMovie.h" 15 #include "SkStream_NSData.h" 16 17 class SkImageDecoder_iOS : public SkImageDecoder { 18 protected: 19 virtual bool onDecode(SkStream* stream, SkBitmap* bm, Mode); 20 }; 21 22 #define BITMAP_INFO (kCGBitmapByteOrder32Big | kCGImageAlphaPremultipliedLast) 23 24 bool SkImageDecoder_iOS::onDecode(SkStream* stream, SkBitmap* bm, Mode mode) { 25 26 NSData* data = NSData_dataWithStream(stream); 27 28 UIImage* uimage = [UIImage imageWithData:data]; 29 30 const int width = uimage.size.width; 31 const int height = uimage.size.height; 32 bm->setInfo(SkImageInfo::MakeN32(width, height, kPremul_SkAlphaType), 0); 33 if (SkImageDecoder::kDecodeBounds_Mode == mode) { 34 return true; 35 } 36 37 if (!this->allocPixelRef(bm, NULL)) { 38 return false; 39 } 40 41 bm->lockPixels(); 42 bm->eraseColor(0); 43 44 CGColorSpaceRef cs = CGColorSpaceCreateDeviceRGB(); 45 CGContextRef cg = CGBitmapContextCreate(bm->getPixels(), width, height, 46 8, bm->rowBytes(), cs, BITMAP_INFO); 47 CGContextDrawImage(cg, CGRectMake(0, 0, width, height), uimage.CGImage); 48 CGContextRelease(cg); 49 CGColorSpaceRelease(cs); 50 51 bm->unlockPixels(); 52 return true; 53 } 54 55 ///////////////////////////////////////////////////////////////////////// 56 57 SkImageDecoder* SkImageDecoder::Factory(SkStreamRewindable* stream) { 58 return new SkImageDecoder_iOS; 59 } 60 61 SkMovie* SkMovie::DecodeStream(SkStreamRewindable* stream) { 62 return NULL; 63 } 64 65 66
