ANE、iOS和BitmapData
ANE、iOS和BitmapData
提问于 2011-12-16 01:45:48
是否有将位图数据传递到iOS并返回修改过的副本的示例。我正在尝试将位图转换为jpeg -类似于Windows http://blog.magicalhobo.com/2011/09/12/air-3-native-extension-imagepro cessor/中的示例，但每次都会崩溃。
我非常确定我正在做一些基本错误的事情，但我不是一个iOS / Objective C程序员，我真的只是在尝试魔法咒语，我找不到任何好的例子。有什么要感谢的吗？
肖恩
附言:下面是我的尝试：
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;}
回答 3
Stack Overflow用户
发布于 2011-12-17 11:43:01
最终版本-似乎工作正常-编码正常，我认为在自我清理后可以正常工作。
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;}
Stack Overflow用户
发布于 2011-12-16 09:58:32
这是一种工作，除了红色是蓝色的jpeg和不确定我释放一切ok。
这就是明天的战斗。
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;
}Stack Overflow用户
发布于 2012-02-02 22:59:03
交换红色和蓝色像素的位置
从iOS得到的格式是：0xAARRGGBB
预计将在AIR应用程序上显示的是：0xAABBGGRR
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/8524388
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