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POHow can I rewrite the GLCameraRipple sample without using iOS 5.0-specific features?
 

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  1. POHow can I rewrite the GLCameraRipple sample without using iOS 5.0-specific features?
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    <p>How can I rewrite Apple's <a href="http://developer.apple.com/library/ios/samplecode/GLCameraRipple/" rel="nofollow">GLCameraRipple example</a> so that it doesn't require iOS 5.0?</p> <p>I need to have it run on iOS 4.x, so I cannot use CVOpenGLESTextureCacheCreateTextureFromImage. What should I do?</p> <p>As a follow on, I'm using the code below to provide YUV data rather than RGB, but the picture is not right, the screen is green. It seems as though UV plane doesn't work.</p> <pre><code>CVPixelBufferLockBaseAddress(cameraFrame, 0); int bufferHeight = CVPixelBufferGetHeight(cameraFrame); int bufferWidth = CVPixelBufferGetWidth(cameraFrame); // Create a new texture from the camera frame data, display that using the shaders glActiveTexture(GL_TEXTURE0); glGenTextures(1, &amp;_lumaTexture); glBindTexture(GL_TEXTURE_2D, _lumaTexture); glUniform1i(UNIFORM[Y], 0); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); // This is necessary for non-power-of-two textures glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE, bufferWidth, bufferHeight, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, CVPixelBufferGetBaseAddressOfPlane(cameraFrame, 0)); glActiveTexture(GL_TEXTURE1); glGenTextures(1, &amp;_chromaTexture); glBindTexture(GL_TEXTURE_2D, _chromaTexture); glUniform1i(UNIFORM[UV], 1); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); // This is necessary for non-power-of-two textures glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); // Using BGRA extension to pull in video frame data directly glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE_ALPHA, bufferWidth/2, bufferHeight/2, 0, GL_LUMINANCE_ALPHA, GL_UNSIGNED_BYTE, CVPixelBufferGetBaseAddressOfPlane(cameraFrame, 1)); [self drawFrame]; glDeleteTextures(1, &amp;_lumaTexture); glDeleteTextures(1, &amp;_chromaTexture); CVPixelBufferUnlockBaseAddress(cameraFrame, 0); </code></pre> <p>How can I fix this?</p>
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    1. USBrad Larson
    1. USuser1278982
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      1. POHow can I rewrite the GLCameraRipple sample without using iOS 5.0-specific features?
      1. USAndrea
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      1. POHow can I rewrite the GLCameraRipple sample without using iOS 5.0-specific features?
      1. USTimur Kuchkarov
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    1. COI wonder why you like to support iOS4? Are you supporting the 3G model?
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      1. POHow can I rewrite the GLCameraRipple sample without using iOS 5.0-specific features?
      1. USNick Weaver
    2. COAs a note, GLCameraRipple was using OpenGL ES 2.0, so I've rewritten your question to make it clear that you're asking about the iOS 5.0-specific fast texture upload capabilities.
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      1. POHow can I rewrite the GLCameraRipple sample without using iOS 5.0-specific features?
      1. USBrad Larson
 

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