OpenGL方式：
与CFDictionaryRef empty; // empty value for attr value.
CFMutableDictionaryRef attrs;
empty = CFDictionaryCreate(kCFAllocatorDefault, NULL, NULL, 0, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
attrs = CFDictionaryCreateMutable(kCFAllocatorDefault, 1, &kCFTypeDictionaryKeyCallBacks, &kCFTypeDictionaryValueCallBacks);
CFDictionarySetValue(attrs, kCVPixelBufferIOSurfacePropertiesKey, empty);
CVReturn err = CVPixelBufferCreate(kCFAllocatorDefault, m_size.width, m_size.height, kCVPixelFormatType_32BGRA, attrs, &m_renderTarget);
if (err) {
}
err = CVOpenGLESTextureCacheCreateTextureFromImage (kCFAllocatorDefault, coreVideoTextureCache, m_renderTarget,
NULL, // texture attributes
GL_TEXTURE_2D,
GL_RGBA,
m_size.width,
m_size.height,
GL_BGRA,
m_option.type,
0,
&m_renderTexture);
metal方式：
CVMetalTextureCacheCreate(
kCFAllocatorDefault,
nil,
device!,
nil,
&textureCache)
let pixelBufferAttri = [kCVPixelBufferIOSurfacePropertiesKey: [:]]
let s = CVPixelBufferCreate(
kCFAllocatorDefault,
720,
1280,
kCVPixelFormatType_32BGRA,
pixelBufferAttri,
&pixelBuffer)
let result = CVMetalTextureCacheCreateTextureFromImage(
kCFAllocatorDefault,
textureCache!,
offlinePixelBuffer!,
nil,
self.colorPixelFormat,
1080,
1920,
0,
&texture)
