opengl es - android read pixels from GL_TEXTURE_EXTERNAL_OES -


I am trying to read pixel / data from an OpenGL texture which is bound to GL_ TEXTURE_EXTERNAL_OES.

The reason for complying this goal to texture is that to obtain a live camera feed on Android, SurgeText is required to create an OpgL texture which is bound to GL_TEXTURE_EXTERNAL_OES.

Since Android uses OpenGL ES, use glGetTexImage () to read image data.

So I am aiming for an FBO and then reading it using readPixels (). This is my code: 

  Glument framebuffer; GlenFrefrbuffers (1, and framebuffer); GlobindFramebuffer (GL_FamBuffer, framebuffer); // Attach the 2D texture into this FBO glFramebufferTextxture2D (GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_EXTERNAL_OES, camera detection, 0); Status ("glFramebufferTextxture2D (error)% d", glGetError ()) returned;   
 However I'm getting error 1282 (GL_INVALID_OPERATION) for some reason.   
 
 
 GL_TEXTURE_EXTERNAL_OES Texture targets usually occur in a YUV color space and the glReadPixels () It does not necessarily have color space conversion automatically, however, you can make a conversion in your own piece shader which provides RGB another texture and then use glReadPixels () to read that .

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