IOS 毛玻璃效果实现

iOS 图片模糊效果实现

最新推荐文章于 2025-09-12 00:40:07 发布

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最新推荐文章于 2025-09-12 00:40:07 发布

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文章标签：人工智能 python c/c++

原文链接：https://my.oschina.net/201003674/blog/325083

2019独角兽企业重金招聘Python工程师标准>>>

//加模糊效果，image是图片，blur是模糊度

- (UIImage *)blurryImage:(UIImage *)image withBlurLevel:(CGFloat)blur {

//模糊度,

if ((blur < 0.1f) || (blur > 2.0f)) {

blur = 0.5f;

}

//boxSize必须大于0

int boxSize = (int)(blur * 100);

boxSize -= (boxSize % 2) + 1;

NSLog(@"boxSize:%i",boxSize);

//图像处理

CGImageRef img = image.CGImage;

//需要引入#import <Accelerate/Accelerate.h>

This document describes the Accelerate Framework, which contains C APIs for vector and matrix math, digital signal processing, large number handling, and image processing.

本文档介绍了Accelerate Framework，其中包含C语言应用程序接口（API）的向量和矩阵数学，数字信号处理，大量处理和图像处理。

//图像缓存,输入缓存，输出缓存

vImage_Buffer inBuffer, outBuffer;

vImage_Error error;

//像素缓存

void *pixelBuffer;

//数据源提供者，Defines an opaque type that supplies Quartz with data.

CGDataProviderRef inProvider = CGImageGetDataProvider(img);

// provider’s data.

CFDataRef inBitmapData = CGDataProviderCopyData(inProvider);

//宽，高，字节/行，data

inBuffer.width = CGImageGetWidth(img);

inBuffer.height = CGImageGetHeight(img);

inBuffer.rowBytes = CGImageGetBytesPerRow(img);

inBuffer.data = (void*)CFDataGetBytePtr(inBitmapData);

//像数缓存，字节行*图片高

pixelBuffer = malloc(CGImageGetBytesPerRow(img) * CGImageGetHeight(img));

outBuffer.data = pixelBuffer;

outBuffer.width = CGImageGetWidth(img);

outBuffer.height = CGImageGetHeight(img);

outBuffer.rowBytes = CGImageGetBytesPerRow(img);

// 第三个中间的缓存区,抗锯齿的效果

void *pixelBuffer2 = malloc(CGImageGetBytesPerRow(img) * CGImageGetHeight(img));

vImage_Buffer outBuffer2;

outBuffer2.data = pixelBuffer2;

outBuffer2.width = CGImageGetWidth(img);

outBuffer2.height = CGImageGetHeight(img);

outBuffer2.rowBytes = CGImageGetBytesPerRow(img);

//Convolves a region of interest within an ARGB8888 source image by an implicit M x N kernel that has the effect of a box filter.

error = vImageBoxConvolve_ARGB8888(&inBuffer, &outBuffer2, NULL, 0, 0, boxSize, boxSize, NULL, kvImageEdgeExtend);

error = vImageBoxConvolve_ARGB8888(&outBuffer2, &inBuffer, NULL, 0, 0, boxSize, boxSize, NULL, kvImageEdgeExtend);

error = vImageBoxConvolve_ARGB8888(&inBuffer, &outBuffer, NULL, 0, 0, boxSize, boxSize, NULL, kvImageEdgeExtend);

if (error) {

NSLog(@"error from convolution %ld", error);

}

// NSLog(@"字节组成部分：%zu",CGImageGetBitsPerComponent(img));

//颜色空间DeviceRGB

CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();

//用图片创建上下文,CGImageGetBitsPerComponent(img),7,8

CGContextRef ctx = CGBitmapContextCreate(

outBuffer.data,

outBuffer.width,

outBuffer.height,

outBuffer.rowBytes,

colorSpace,

CGImageGetBitmapInfo(image.CGImage));

//根据上下文，处理过的图片，重新组件

CGImageRef imageRef = CGBitmapContextCreateImage (ctx);

UIImage *returnImage = [UIImage imageWithCGImage:imageRef];

//clean up

CGContextRelease(ctx);

CGColorSpaceRelease(colorSpace);

free(pixelBuffer);

free(pixelBuffer2);

CFRelease(inBitmapData);

CGColorSpaceRelease(colorSpace);

CGImageRelease(imageRef);

return returnImage;

}

转载于:https://my.oschina.net/201003674/blog/325083

IOS 毛玻璃 效果实现

IOS 毛玻璃效果实现