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bugfix:sawtooth and image blur when using GPUImageUIElement in GPUIm… #2539

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bugfix:sawtooth and image blur when using GPUImageUIElement in GPUIm… #2539

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8 changes: 6 additions & 2 deletions framework/Source/GPUImageUIElement.m
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Original file line number Diff line number Diff line change
Expand Up @@ -52,10 +52,14 @@ - (id)initWithLayer:(CALayer *)inputLayer;
#pragma mark -
#pragma mark Layer management

- (float)contentScale {
return [UIScreen mainScreen].scale;
}

- (CGSize)layerSizeInPixels;
{
CGSize pointSize = layer.bounds.size;
return CGSizeMake(layer.contentsScale * pointSize.width, layer.contentsScale * pointSize.height);
return CGSizeMake([self contentScale] * pointSize.width, [self contentScale] * pointSize.height);
}

- (void)update;
Expand Down Expand Up @@ -90,7 +94,7 @@ - (void)updateWithTimestamp:(CMTime)frameTime;
CGContextRef imageContext = CGBitmapContextCreate(imageData, (int)layerPixelSize.width, (int)layerPixelSize.height, 8, (int)layerPixelSize.width * 4, genericRGBColorspace, kCGBitmapByteOrder32Little | kCGImageAlphaPremultipliedFirst);
// CGContextRotateCTM(imageContext, M_PI_2);
CGContextTranslateCTM(imageContext, 0.0f, layerPixelSize.height);
CGContextScaleCTM(imageContext, layer.contentsScale, -layer.contentsScale);
CGContextScaleCTM(imageContext, [self contentScale], -[self contentScale]);
// CGContextSetBlendMode(imageContext, kCGBlendModeCopy); // From Technical Q&A QA1708: http://developer.apple.com/library/ios/#qa/qa1708/_index.html

[layer renderInContext:imageContext];
Expand Down