static BOOL YYCGImageDecodeToBitmapBufferWithAnyFormat()

in iOS/WAStickersThirdParty/YYImageCoder.m [695:742]
40 lines of code
18 McCabe index (conditional complexity)

static BOOL YYCGImageDecodeToBitmapBufferWithAnyFormat(CGImageRef srcImage, vImage_Buffer *dest, vImage_CGImageFormat *destFormat) {
    if (!srcImage || (((long)vImageConvert_AnyToAny) + 1 == 1) || !destFormat || !dest) return NO;
    size_t width = CGImageGetWidth(srcImage);
    size_t height = CGImageGetHeight(srcImage);
    if (width == 0 || height == 0) return NO;
    dest->data = NULL;
    
    vImage_Error error = kvImageNoError;
    CFDataRef srcData = NULL;
    vImageConverterRef convertor = NULL;
    vImage_CGImageFormat srcFormat = {0};
    srcFormat.bitsPerComponent = (uint32_t)CGImageGetBitsPerComponent(srcImage);
    srcFormat.bitsPerPixel = (uint32_t)CGImageGetBitsPerPixel(srcImage);
    srcFormat.colorSpace = CGImageGetColorSpace(srcImage);
    srcFormat.bitmapInfo = CGImageGetBitmapInfo(srcImage) | CGImageGetAlphaInfo(srcImage);
    
    convertor = vImageConverter_CreateWithCGImageFormat(&srcFormat, destFormat, NULL, kvImageNoFlags, NULL);
    if (!convertor) goto fail;
    
    CGDataProviderRef srcProvider = CGImageGetDataProvider(srcImage);
    srcData = srcProvider ? CGDataProviderCopyData(srcProvider) : NULL; // decode
    size_t srcLength = srcData ? CFDataGetLength(srcData) : 0;
    const void *srcBytes = srcData ? CFDataGetBytePtr(srcData) : NULL;
    if (srcLength == 0 || !srcBytes) goto fail;
    
    vImage_Buffer src = {0};
    src.data = (void *)srcBytes;
    src.width = width;
    src.height = height;
    src.rowBytes = CGImageGetBytesPerRow(srcImage);
    
    error = vImageBuffer_Init(dest, height, width, 32, kvImageNoFlags);
    if (error != kvImageNoError) goto fail;
    
    error = vImageConvert_AnyToAny(convertor, &src, dest, NULL, kvImageNoFlags); // convert
    if (error != kvImageNoError) goto fail;
    
    CFRelease(convertor);
    CFRelease(srcData);
    return YES;
    
fail:
    if (convertor) CFRelease(convertor);
    if (srcData) CFRelease(srcData);
    if (dest->data) free(dest->data);
    dest->data = NULL;
    return NO;
}