GPUImage 初步学习

项目中导入 GPUImage

GPUImage在导入工程之前,需要先在本地运行,然后将运行后的文件拖入到工程中.

(1)需要注意的是,在编译前,需要:
把 Headers文件夹下 Project 中的头文件,全部拖到 Public文件夹下面.

拖动完

(2)点击Products下的 libGPUImage.a，右键， show in finder
(3)把该目录下的libGpuImage.a 和 usr文件夹拖到我们的工程中
(4)导入#import "GPUImage.h头文件,即可使用

一些滤镜:

/**
 高斯模糊
 */
- (UIImage *)imageGaussianBlurFilter{
    //滤镜
    GPUImageGaussianBlurFilter *disFilter = [[GPUImageGaussianBlurFilter alloc]init];
    //高斯能力 size 越大效果越不明显
    [disFilter forceProcessingAtSize:CGSizeMake(40, 20)];
    [disFilter useNextFrameForImageCapture];
    GPUImagePicture *imageSoure = [[GPUImagePicture alloc]initWithImage:self.imageView.image];
    //添加滤镜
    [imageSoure addTarget:disFilter];
    //开始渲染
    [imageSoure processImage];
    //渲染后的图片
    UIImage *newImage = [disFilter imageFromCurrentFramebuffer];
    
    return  newImage;
}

/**
 部分高斯
 */
- (UIImage *)imageGaussianSelectiveBlurFilter{
    //滤镜
    GPUImageGaussianSelectiveBlurFilter *disFilter = [[GPUImageGaussianSelectiveBlurFilter alloc]init];
    //渲染范围
    //半径
    disFilter.excludeCircleRadius = 0.3;
    //圆心
    disFilter.excludeCirclePoint = CGPointMake(0.1, 0.4);
    
    //资源源
    GPUImagePicture *imageSoure = [[GPUImagePicture alloc]initWithImage:self.imageView.image];
    [imageSoure addTarget:disFilter];
    [imageSoure processImage];
    [disFilter useNextFrameForImageCapture];
    //渲染后的图片
    UIImage *newImage = [disFilter imageFromCurrentFramebuffer];
    return  newImage;
}

/*
  *  怀旧
  */
- (UIImage *)imageSepiaFilter{
    
    GPUImageSepiaFilter *gaussianBlurFilter = [[GPUImageSepiaFilter alloc] init];
    [gaussianBlurFilter useNextFrameForImageCapture];
    // 获取数据源
    GPUImagePicture *stillImageSource = [[GPUImagePicture alloc]initWithImage:self.imageView.image];
    // 添加上滤镜
    [stillImageSource addTarget:gaussianBlurFilter];
    // 开始渲染
    [stillImageSource processImage];
    // 获取渲染后的图片
    UIImage *newImage = [gaussianBlurFilter imageFromCurrentFramebuffer];
    return newImage;
}

/**
 *  素描
 */
- (UIImage *)imageSketchFilter{
    
    GPUImageSketchFilter *gaussianBlurFilter = [[GPUImageSketchFilter alloc] init];
    [gaussianBlurFilter useNextFrameForImageCapture];
    // 获取数据源
    GPUImagePicture *stillImageSource = [[GPUImagePicture alloc]initWithImage:self.imageView.image];
    // 添加上滤镜
    [stillImageSource addTarget:gaussianBlurFilter];
    // 开始渲染
    [stillImageSource processImage];
    // 获取渲染后的图片
    UIImage *newImage = [gaussianBlurFilter imageFromCurrentFramebuffer];
    return newImage;
}