主要类别
1.GPUImagePicture(图片处理)
2.GPUImageOutput(滤镜，分单个和多个之分；多个使用GPUImageFilterGroup)
下面为主要处理代码
第一：单个滤镜
//图片处理对象，self.selectImage为要处理的image
sourcePicture = [[GPUImagePicture alloc] initWithImage:self.selectImage smoothlyScaleOutput:YES];
sepiaFilter = [[GPUImageContrastFilter alloc] init];//对比度
//
[sourcePicture addTarget:sepiaFilter];
[sourcePicture processImage];
//输出图片
UIImage *image = [sepiaGroup imageFromCurrentFramebuffer];
//设置图片
self.imageView.image= image;
第二：组合滤镜（Group）
- (void)setupDisplayFiltering;
{
sourcePicture = [[GPUImagePicture alloc] initWithImage:self.selectImage smoothlyScaleOutput:YES];
sepiaGroup = [[GPUImageFilterGroup alloc]init];//数组
[sourcePicture addTarget:sepiaGroup];
sepiaFilter = [[GPUImageContrastFilter alloc] init];//对比度
sepiaFilter2 = [[GPUImageSaturationFilter alloc] init];//饱和度
sepiaFilter3 = [[GPUImageExposureFilter alloc] init];//曝光
sepiaFilter4 = [[GPUImageSharpenFilter alloc] init];//锐化
sepiaFilter5 = [[GPUImageRGBFilter alloc] init];//RGB
// [sepiaFilter forceProcessingAtSize:self.imageView.bounds.size]; // This is now needed to make the filter run at the smaller output size
// [sepiaFilter2 forceProcessingAtSize:self.imageView.bounds.size]; // This is now needed to make the filter run at the smaller output size
// [sepiaFilter3 forceProcessingAtSize:self.imageView.bounds.size]; // This is now needed to make the filter run at the smaller output size
// [sepiaFilter4 forceProcessingAtSize:self.imageView.bounds.size]; // This is now needed to make the filter run at the smaller output size
// [sepiaFilter5 forceProcessingAtSize:self.imageView.bounds.size]; // This is now needed to make the filter run at the smaller output size
// [sepiaFilter6 forceProcessingAtSize:self.imageView.bounds.size]; // This is now needed to make the filter run at the smaller output size
[self addGPUImageFilter:sepiaFilter];
[self addGPUImageFilter:sepiaFilter2];
[self addGPUImageFilter:sepiaFilter3];
[self addGPUImageFilter:sepiaFilter4];
[self addGPUImageFilter:sepiaFilter5];
[sepiaGroup useNextFrameForImageCapture];
[sourcePicture processImage];
UIImage *image = [sepiaGroup imageFromCurrentFramebuffer];
NSLog(@"image----%@",image);
self.imageView.image= image;
}
- (void)addGPUImageFilter:(GPUImageOutput *)filter
{
[sepiaGroupaddFilter:filter];
GPUImageOutput *newTerminalFilter = filter;
NSIntegercount =sepiaGroup.filterCount;
if(count ==1)
{
sepiaGroup.initialFilters=@[newTerminalFilter];
sepiaGroup.terminalFilter= newTerminalFilter;
}else
{
GPUImageOutput<GPUImageInput> *terminalFilter =sepiaGroup.terminalFilter;
NSArray*initialFilters =sepiaGroup.initialFilters;
[terminalFilteraddTarget:newTerminalFilter];
sepiaGroup.initialFilters=@[initialFilters[0]];
sepiaGroup.terminalFilter= newTerminalFilter;
}
}
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