Objective c 帮助查找内存泄漏
有谁能帮我找到下面代码中的内存泄漏,它可以调整图像的亮度Objective c 帮助查找内存泄漏,objective-c,cocoa,memory-leaks,nsimage,Objective C,Cocoa,Memory Leaks,Nsimage,有谁能帮我找到下面代码中的内存泄漏,它可以调整图像的亮度 +(NSImage *)brightness:(NSImage *)image andLevel:(int)level { CGImageSourceRef source= CGImageSourceCreateWithData((CFDataRef)[image TIFFRepresentation], NULL); CGImageRef img = CGImageSourceCreateImageAtIndex(so
+(NSImage *)brightness:(NSImage *)image andLevel:(int)level
{
CGImageSourceRef source= CGImageSourceCreateWithData((CFDataRef)[image TIFFRepresentation], NULL);
CGImageRef img = CGImageSourceCreateImageAtIndex(source, 0, NULL);
NSSize size = image.size;
CGRect rect = CGRectMake(0.0f, 0.0f, size.width, size.height);
//getting bitmap data from receiver's CGImage
CFDataRef dataref=CGDataProviderCopyData(CGImageGetDataProvider(img));
//getting bytes from bitmap image
UInt8 *data=(UInt8 *)CFDataGetBytePtr(dataref);
//getting length
int length=CFDataGetLength(dataref);
// Perform operation on pixels
for(int index=0;index<length;index += 1)
{
// Go For BRIGHTNESS
for(int i=0;i<3;i++)
{
//printf("This pixel is:%d",data[index + i]);
if(data[index+i]+level<0)
{
data[index+i]=0;
}
else
{
if(data[index+i]+level>255)
{
data[index+i]=255;
}
else
{
data[index+i]+=level;
}
}
}
}
// .. Take image attributes
size_t width=CGImageGetWidth(img);
size_t height=CGImageGetHeight(img);
size_t bitsPerComponent=CGImageGetBitsPerComponent(img);
size_t bitsPerPixel=CGImageGetBitsPerPixel(img);
size_t bytesPerRow=CGImageGetBytesPerRow(img);
// .. Do the pixel manupulation
CGColorSpaceRef colorspace=CGImageGetColorSpace(img);
CGBitmapInfo bitmapInfo=CGImageGetBitmapInfo(img);
CFDataRef newData=CFDataCreate(NULL,data,length);
CGDataProviderRef provider=CGDataProviderCreateWithCFData(newData);
// .. Get the Image out of this raw data
CGImageRef newImg=CGImageCreate(width,height,bitsPerComponent,bitsPerPixel,bytesPerRow,colorspace,bitmapInfo,provider,NULL,true,kCGRenderingIntentDefault);
// .. Prepare the image from raw data
NSImage* newImage = [[NSImage alloc] initWithSize:size];
//To make the drawing appear on the image instead of on the screen
[newImage lockFocus];
//Draws an image into a graphics context.
CGContextDrawImage([[NSGraphicsContext currentContext] graphicsPort],*(CGRect*)&rect, newImg);
[newImage unlockFocus];
// .. done with all,so release the references
CFRelease(source);
CFRelease(img);
CFRelease(dataref);
CFRelease(colorspace);
CFRelease(newData);
CFRelease(provider);
return [newImage autorelease];
}
+(NSImage*)亮度:(NSImage*)图像和级别:(int)级别
{
CGImageSourceRef source=CGImageSourceCreateWithData((CFDataRef)[image TIFFRepresentation],NULL);
CGImageRef img=CGImageSourceCreateMageAtIndex(源,0,空);
NSSize size=image.size;
CGRect rect=CGRectMake(0.0f,0.0f,size.width,size.height);
//从接收器的CGImage获取位图数据
CFDataRef dataref=CGDataProviderCopyData(CGImageGetDataProvider(img));
//从位图图像获取字节
UInt8*数据=(UInt8*)CFDataGetBytePtr(dataref);
//获得长度
int length=CFDataGetLength(dataref);
//对像素执行操作
对于(int index=0;index替换以下代码行):
NSImage* newImage = [[NSImage alloc] initWithSize:size];
与
这个:return[newImage autorelease];
withreturnnewimage;
我不是百分之百确定,但是试试看,希望能有所帮助
:)您忘记了发布通过创建函数获得的newImg
。此外,您不应该发布colorSpace
,因为您没有通过创建或复制函数获得它,也没有保留它。您的建议会产生与原始代码相同的结果。我已经说过了,我不确定是不是et无法阻止自己帮助他。:)你确定有什么东西泄漏了?@akhil:那么请告诉我们,泄漏的是什么东西?@akhilnewImg
是唯一明显的泄漏。如果你有其他泄漏,那么可能不在你粘贴的代码中(在实现我的建议后)。
NSImage* newImage = [[[NSImage alloc] initWithSize:size] autorelease];