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 SkColorType ct = SkBitmapConfigToColorType(SkBitmap::kARGB_8888_Config); 33 bm->setInfo(SkImageInfo::Make(width, height, ct, kPremul_SkAlphaType), 0); 34 if (SkImageDecoder::kDecodeBounds_Mode == mode) { 35 return true; 36 } 37 38 if (!this->allocPixelRef(bm, NULL)) { 39 return false; 40 } 41 42 bm->lockPixels(); 43 bm->eraseColor(0); 44 45 CGColorSpaceRef cs = CGColorSpaceCreateDeviceRGB(); 46 CGContextRef cg = CGBitmapContextCreate(bm->getPixels(), width, height, 47 8, bm->rowBytes(), cs, BITMAP_INFO); 48 CGContextDrawImage(cg, CGRectMake(0, 0, width, height), uimage.CGImage); 49 CGContextRelease(cg); 50 CGColorSpaceRelease(cs); 51 52 bm->unlockPixels(); 53 return true; 54 } 55 56 ///////////////////////////////////////////////////////////////////////// 57 58 SkImageDecoder* SkImageDecoder::Factory(SkStreamRewindable* stream) { 59 return new SkImageDecoder_iOS; 60 } 61 62 SkMovie* SkMovie::DecodeStream(SkStreamRewindable* stream) { 63 return NULL; 64 } 65 66 SkImageEncoder* SkImageEncoder::Create(Type t) { 67 return NULL; 68 } 69 70
