StackOverflow2013

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POCore Video pixel buffers as GL_TEXTURE_2D
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copied!<p>So I've setup CVPixelBuffer's and tied them to OpenGL FBOs successfully on iOS. But now trying to do the same on OSX has me snagged. </p> <p>The textures from CVOpenGLTextureCacheCreateTextureFromImage return as GL_TEXTURE_RECTANGLE instead of GL_TEXTURE_2D targets.</p> <p>I've found the kCVOpenGLBufferTarget key, but it seems like it is supposed to be used with CVOpenGLBufferCreate not CVPixelBufferCreate.</p> <p>Is it even possible to get GL_TEXTURE_2D targeted textures on OSX with CVPixelBufferCreate, and if so how?</p> <p>FWIW a listing of the CV PBO setup:</p> <pre><code>NSDictionary *bufferAttributes = @{ (__bridge NSString *)kCVPixelBufferPixelFormatTypeKey : @(kCVPixelFormatType_32BGRA), (__bridge NSString *)kCVPixelBufferWidthKey : @(size.width), (__bridge NSString *)kCVPixelBufferHeightKey : @(size.height), (__bridge NSString *)kCVPixelBufferIOSurfacePropertiesKey : @{ } }; if (pool) { error = CVPixelBufferPoolCreatePixelBuffer(kCFAllocatorDefault, pool, &renderTarget); } else { error = CVPixelBufferCreate(kCFAllocatorDefault, (NSUInteger)size.width, (NSUInteger)size.height, kCVPixelFormatType_32BGRA, (__bridge CFDictionaryRef)bufferAttributes, &renderTarget); } ZAssert(!error, @"Couldn't create pixel buffer"); error = CVOpenGLTextureCacheCreate(kCFAllocatorDefault, NULL, [[NSOpenGLContext context] CGLContextObj], [[NSOpenGLContext format] CGLPixelFormatObj], NULL, &textureCache); ZAssert(!error, @"Could not create texture cache."); error = CVOpenGLTextureCacheCreateTextureFromImage(kCFAllocatorDefault, textureCache, renderTarget, NULL, &renderTexture); ZAssert(!error, @"Couldn't create a texture from cache."); GLuint reference = CVOpenGLTextureGetName(renderTexture); GLenum target = CVOpenGLTextureGetTarget(renderTexture); </code></pre> <p>UPDATE: I've been able to successfully use the resulting GL_TEXTURE_RECTANGLE textures. However, this will cause a lot of problems with the shaders for compatibility between iOS and OSX. And anyway I'd rather continue to use normalised texture coordinates.</p> <p>If it isn't possible to get GL_TEXTURE_2D textures directly from a CVPixelBuffer in this manner, would it be possible to create a CVOpenGLBuffer and have a CVPixelBuffer attached to it to pull the pixel data?</p>

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