I am trying to load some PNG data with MTKTextureLoader newTextureWithData，but the result shows wrong at the alpha area.
Here is the code. I have an image URL, after it downloads successfully, I try to use the data or UIImagePNGRepresentation (image), they all show wrong.
UIImage *tempImg = [UIImage imageWithData:data];
CGImageRef cgRef = tempImg.CGImage;
MTKTextureLoader *loader = [[MTKTextureLoader alloc] initWithDevice:device];
id<MTLTexture> temp1 = [loader newTextureWithData:data options:@{MTKTextureLoaderOptionSRGB: @(NO), MTKTextureLoaderOptionTextureUsage: @(MTLTextureUsageShaderRead), MTKTextureLoaderOptionTextureCPUCacheMode: @(MTLCPUCacheModeWriteCombined)} error:nil];
NSData *tempData = UIImagePNGRepresentation(tempImg);
id<MTLTexture> temp2 = [loader newTextureWithData:tempData options:@{MTKTextureLoaderOptionSRGB: @(NO), MTKTextureLoaderOptionTextureUsage: @(MTLTextureUsageShaderRead), MTKTextureLoaderOptionTextureCPUCacheMode: @(MTLCPUCacheModeWriteCombined)} error:nil];
id<MTLTexture> temp3 = [loader newTextureWithCGImage:cgRef options:@{MTKTextureLoaderOptionSRGB: @(NO), MTKTextureLoaderOptionTextureUsage: @(MTLTextureUsageShaderRead), MTKTextureLoaderOptionTextureCPUCacheMode: @(MTLCPUCacheModeWriteCombined)} error:nil];
}] resume];
ynot16
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this code below will crash after running around 5 minutes. caused by high cpu usage and memory usage.
[NSTimer scheduledTimerWithTimeInterval:0.1 repeats:YES block:^(NSTimer * _Nonnull timer) {
if (@available(iOS 10.0, *)) {
UIImpactFeedbackGenerator *feedBackGenertor = [[UIImpactFeedbackGenerator alloc] initWithStyle:UIImpactFeedbackStyleMedium];
[feedBackGenertor impactOccurred];
}
}];