michael@0: /*
michael@0:  * Copyright 2010 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #import <CoreGraphics/CoreGraphics.h>
michael@0: #include <CoreGraphics/CGColorSpace.h>
michael@0: #import <UIKit/UIKit.h>
michael@0: 
michael@0: #include "SkImageDecoder.h"
michael@0: #include "SkImageEncoder.h"
michael@0: #include "SkMovie.h"
michael@0: #include "SkStream_NSData.h"
michael@0: 
michael@0: class SkImageDecoder_iOS : public SkImageDecoder {
michael@0: protected:
michael@0:     virtual bool onDecode(SkStream* stream, SkBitmap* bm, Mode);
michael@0: };
michael@0: 
michael@0: #define BITMAP_INFO (kCGBitmapByteOrder32Big | kCGImageAlphaPremultipliedLast)
michael@0: 
michael@0: bool SkImageDecoder_iOS::onDecode(SkStream* stream, SkBitmap* bm, Mode mode) {
michael@0: 
michael@0:     NSData* data = NSData_dataWithStream(stream);
michael@0: 
michael@0:     UIImage* uimage = [UIImage imageWithData:data];
michael@0:     
michael@0:     const int width = uimage.size.width;
michael@0:     const int height = uimage.size.height;
michael@0:     bm->setConfig(SkBitmap::kARGB_8888_Config, width, height);
michael@0:     if (SkImageDecoder::kDecodeBounds_Mode == mode) {
michael@0:         return true;
michael@0:     }
michael@0:     
michael@0:     if (!this->allocPixelRef(bm, NULL)) {
michael@0:         return false;
michael@0:     }
michael@0:     
michael@0:     bm->lockPixels();
michael@0:     bm->eraseColor(0);
michael@0:     
michael@0:     CGColorSpaceRef cs = CGColorSpaceCreateDeviceRGB();
michael@0:     CGContextRef cg = CGBitmapContextCreate(bm->getPixels(), width, height,
michael@0:                                             8, bm->rowBytes(), cs, BITMAP_INFO);
michael@0:     CGContextDrawImage(cg, CGRectMake(0, 0, width, height), uimage.CGImage);
michael@0:     CGContextRelease(cg);
michael@0:     CGColorSpaceRelease(cs);
michael@0:     
michael@0:     bm->unlockPixels();
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: /////////////////////////////////////////////////////////////////////////
michael@0: 
michael@0: SkImageDecoder* SkImageDecoder::Factory(SkStreamRewindable* stream) {
michael@0:     return new SkImageDecoder_iOS;
michael@0: }
michael@0: 
michael@0: SkMovie* SkMovie::DecodeStream(SkStreamRewindable* stream) {
michael@0:     return NULL;
michael@0: }
michael@0: 
michael@0: SkImageEncoder* SkImageEncoder::Create(Type t) {
michael@0:     return NULL;
michael@0: }
michael@0: