我正在使用此功能來創建我的IPAD應用程序的屏幕截圖。我在我的項目中使用Sparrow框架。 SPDisplayObject使用基於OpenGl-ES的渲染。IPad上使用的OpneGL-ES截圖功能中的內存泄漏在哪裏?
@implementation SPDisplayObject (ScreenshotFromSPDisplayObject)
- (UIImage *)getImageScreenshot{
int WIDTH = 1024;
int HEIGHT = 768;
CGSize size = CGSizeMake(WIDTH,HEIGHT);
//Create un buffer for pixels
GLuint bufferLenght=size.width*size.height*4;
GLubyte *buffer = (GLubyte *) malloc(bufferLenght);
//Read Pixels from OpenGL
glReadPixels(0,0,size.width,size.height,GL_RGBA,GL_UNSIGNED_BYTE,buffer);
//Make data provider with data.
CGDataProviderRef provider = CGDataProviderCreateWithData(NULL, buffer, bufferLenght, NULL);
//Configure image
int bitsPerComponent = 8;
int bitsPerPixel = 32;
int bytesPerRow = 4 * size.width;
CGColorSpaceRef colorSpaceRef = CGColorSpaceCreateDeviceRGB();
CGBitmapInfo bitmapInfo = kCGBitmapByteOrderDefault;
CGColorRenderingIntent renderingIntent = kCGRenderingIntentDefault;
CGImageRef iref = CGImageCreate(size.width,size.height,bitsPerComponent,bitsPerPixel,bytesPerRow,colorSpaceRef,bitmapInfo,provider,NULL,NO,renderingIntent);
uint32_t *pixels = (uint32_t *)malloc(bufferLenght);
CGContextRef context = CGBitmapContextCreate(pixels, WIDTH, HEIGHT, 8, WIDTH*4, CGImageGetColorSpace(iref), kCGImageAlphaPremultipliedLast | kCGBitmapByteOrder32Big);
CGContextTranslateCTM(context,0, size.height);
CGContextScaleCTM(context, 1.0, -1.0);
CGContextDrawImage(context, CGRectMake(0.0, 0.0, size.width, size.height), iref);
UIImage* screenshot = [UIImage imageWithCGImage:CGBitmapContextCreateImage(context)];
UIGraphicsEndImageContext();
//free memory
CGColorSpaceRelease(colorSpaceRef);
CGDataProviderRelease(provider);
CGImageRelease(iref);
CGContextRelease(context);
free(buffer);
free(pixels);
return screenshot;
}
@end
我這樣使用它從UIViewController中:
@interface
UIImageView *screenShot;
UIImage *tempImage;
-(void) deactivePage
{
// attach screenshot
tempImage = [self.stage getImageScreenshot];
screenShot = [[UIImageView alloc] initWithFrame:CGRectMake(0,0,1024,768)];
screenShot.image = tempImage;
[self.view addSubview:screenShot];
}
- (void)dealloc
{
screenShot.image = nil;
[screenShot removeFromSuperview];
[screenShot release];
[super dealloc];
}
的UIViewController中被釋放,並aprox的釋放。調用「deactivePage」函數5秒鐘後。 屏幕截圖用於視圖轉換。
以屏幕截圖工作就像一個魅力,但與每個屏幕截圖我的應用程序增長約10 MB所以我可以做到這一點大約15倍,直到應用程序崩潰。
那麼泄漏在哪裏?我堅持.. :-(
您是否使用過儀器檢查什麼被泄漏以及在哪裏? – 2011-02-26 16:46:11