mirrors
/
SDWebImage
mirror of https://github.com/SDWebImage/SDWebImage.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

Creating the CGBitmapContext with the right bytes per pixel and bitmap info depending on the original image. 

This removes an error that was making CGBitmapContext return NULL with some images:
<Error>: CGBitmapContextCreate: unsupported parameter combination: 8 integer bits/component; 32 bits/pixel; 3-component color space; kCGImageAlphaLast; 400 bytes/row.
This commit is contained in:
Javier Soto 2012-10-12 13:43:33 -07:00
parent 6818520744
commit 487db1b385
1 changed files with 9 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
SDWebImage/SDWebImageDecoder.m
View File

@ -99,16 +99,21 @@ static SDWebImageDecoder *sharedInstance;
CGImageRef imageRef = image.CGImage;
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGImageAlphaInfo alphaInfo = CGImageGetAlphaInfo(imageRef);
BOOL imageHasAlphaInfo = (alphaInfo != kCGImageAlphaNone);
int bytesPerPixel = imageHasAlphaInfo ? 4 : 3;
CGBitmapInfo bitmapInfo = imageHasAlphaInfo ? kCGImageAlphaPremultipliedLast : kCGImageAlphaNone;
CGContextRef context = CGBitmapContextCreate(NULL,
CGImageGetWidth(imageRef),
CGImageGetHeight(imageRef),
8,
// Just always return width * 4 will be enough
CGImageGetWidth(imageRef) * 4,
// Just always return width * bytesPerPixel will be enough
CGImageGetWidth(imageRef) * bytesPerPixel,
// System only supports RGB, set explicitly
colorSpace,
// Makes system don't need to do extra conversion when displayed.
alphaInfo | kCGBitmapByteOrder32Little);
bitmapInfo);
CGColorSpaceRelease(colorSpace);
if (!context) return nil;