是否有任何将位图数据传递到iOS并返回修改后的副本的示例。我试图将位图转换为jpeg - 类似于Windows http://blog.magicalhobo.com/2011/09/12/air-3-native-extension-imagepro cessor /中的此示例,但每次都崩溃了。
我很确定我做了一些基本的错误但不是iOS / Objective C程序员我真的只是在尝试魔术咒语,我找不到任何好的例子。有什么帮助表示赞赏吗?
肖恩
P.S。以下是我的尝试:
FREObject encodeJPEG(FREContext ctx, void* funcData, uint32_t argc, FREObject argv[])
{
FREObject objectBitmapData = argv[0];
FREBitmapData bitmapData;
FREAcquireBitmapData(objectBitmapData, &bitmapData);
int width = bitmapData.width;
int height = bitmapData.height;
int stride = bitmapData.lineStride32 * 4;
uint32_t* input = bitmapData.bits32;
FREReleaseBitmapData(objectBitmapData);
UIImage *myImage = [UIImage imageWithData:input];
NSData *jpgData = UIImageJPEGRepresentation(myImage, 0.9);
FREObject objectByteArray = argv[1];
FREByteArray byteArray;
FREObject length;
FRENewObjectFromUint32(jpgData.length, &length);
FRESetObjectProperty(objectByteArray, (const uint8_t*) "length", length, NULL);
FREAcquireByteArray(objectByteArray, &byteArray);
memcpy(byteArray.bytes, jpgData.bytes, jpgData.length);
FREReleaseByteArray(objectByteArray);
return NULL;
}
答案 0 :(得分:3)
结局版本 - 似乎工作正常 - 编码正常,我认为自己确定后可以清理。
肖恩
FREObject encodeJPEG( FREContext ctx, void* funcData, uint32_t argc, FREObject argv[] )
{
FREObject objectBitmapData = argv[ 0 ];
FREBitmapData2 bitmapData;
FREAcquireBitmapData2( objectBitmapData, &bitmapData );
int width = bitmapData.width;
int height = bitmapData.height;
int stride = bitmapData.lineStride32 * 4;
uint32_t* input = bitmapData.bits32;
// make data provider from buffer
CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, bitmapData.bits32, (width * height * 4), NULL);
// set up for CGImage creation
int bitsPerComponent = 8;
int bitsPerPixel = 32;
int bytesPerRow = 4 * width;
CGColorSpaceRef colorSpaceRef = CGColorSpaceCreateDeviceRGB();
CGBitmapInfo bitmapInfo;
if( bitmapData.hasAlpha )
{
if( bitmapData.isPremultiplied )
bitmapInfo = kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst;
else
bitmapInfo = kCGBitmapByteOrder32Little | kCGImageAlphaFirst;
}
else
{
bitmapInfo = kCGBitmapByteOrder32Little | kCGImageAlphaNoneSkipFirst;
}
CGColorRenderingIntent renderingIntent = kCGRenderingIntentDefault;
CGImageRef imageRef = CGImageCreate(width, height, bitsPerComponent, bitsPerPixel, bytesPerRow, colorSpaceRef, bitmapInfo, provider, NULL, NO, renderingIntent);
// make UIImage from CGImage
UIImage *myImage = [UIImage imageWithCGImage:imageRef];
NSData* jpgData = UIImageJPEGRepresentation( myImage, 0.9 );
FREReleaseBitmapData( objectBitmapData );
FREObject objectByteArray = argv[ 1 ];
FREByteArray byteArray;
FREObject length;
FRENewObjectFromUint32( jpgData.length, &length );
FRESetObjectProperty( objectByteArray, ( const uint8_t* ) "length", length, NULL );
FREAcquireByteArray( objectByteArray, &byteArray );
memcpy( byteArray.bytes, jpgData.bytes, jpgData.length );
FREReleaseByteArray( objectByteArray );
// release bits
CGColorSpaceRelease(colorSpaceRef);
CGImageRelease(imageRef);
CGDataProviderRelease(provider);
return NULL;
}
答案 1 :(得分:0)
除了红色是jpeg中的蓝调之外,这种方式有效,并且不确定我是否正在释放所有内容。
那是明天的战斗。
肖恩
FREObject encodeJPEG( FREContext ctx, void* funcData, uint32_t argc, FREObject argv[] )
{
FREObject objectBitmapData = argv[ 0 ];
FREBitmapData2 bitmapData;
FREAcquireBitmapData2( objectBitmapData, &bitmapData );
int width = bitmapData.width;
int height = bitmapData.height;
int stride = bitmapData.lineStride32 * 4;
uint32_t* input = bitmapData.bits32;
// make data provider from buffer
CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, bitmapData.bits32, (width * height * 4), NULL);
// set up for CGImage creation
int bitsPerComponent = 8;
int bitsPerPixel = 32;
int bytesPerRow = 4 * width;
CGColorSpaceRef colorSpaceRef = CGColorSpaceCreateDeviceRGB();
CGBitmapInfo bitmapInfo = kCGBitmapByteOrderDefault | kCGImageAlphaPremultipliedFirst;
CGColorRenderingIntent renderingIntent = kCGRenderingIntentDefault;
CGImageRef imageRef = CGImageCreate(width, height, bitsPerComponent, bitsPerPixel, bytesPerRow, colorSpaceRef, bitmapInfo, provider, NULL, NO, renderingIntent);
// make UIImage from CGImage
UIImage *myImage = [UIImage imageWithCGImage:imageRef];
NSData* jpgData = UIImageJPEGRepresentation( myImage, 0.9 );
FREReleaseBitmapData( objectBitmapData );
FREObject objectByteArray = argv[ 1 ];
FREByteArray byteArray;
FREObject length;
FRENewObjectFromUint32( jpgData.length, &length );
FRESetObjectProperty( objectByteArray, ( const uint8_t* ) "length", length, NULL );
FREAcquireByteArray( objectByteArray, &byteArray );
memcpy( byteArray.bytes, jpgData.bytes, jpgData.length );
FREReleaseByteArray( objectByteArray );
return NULL;
}
答案 2 :(得分:0)
交换红色和蓝色像素的位置
您从iOS获得的格式为:0xAARRGGBB
预期在AIR应用程序上显示的那个是:0xAABBGGRR