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Thread: glReadPixels error

  1. #1
    Senior Member Regular Contributor
    Join Date
    Aug 2010

    glReadPixels error

    Code :
    /*Read values back*/
    /*Set the target framebuffer to read*/
    /*Read the packet payload from framebuffer to PBO*/
    glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, pboread);
    printf("Data after roundtrip:\n");
    /*Map the PBO to process the data by CPU*/
    glBindBufferARB(GL_PIXEL_PACK_BUFFER_ARB, pboread);
    for (i=0; i<noOfpacket*size; i++)

    It returns me GL Error: Invalid enumerant. I cant find this error from the glReadPixels functions.

    Here is the function check code:

    Code :
    void checkError(char *str)
    	GLenum error;
    	if ((error = glGetError()) != GL_NO_ERROR)
    		printf("GL Error: %s (%s)\n", gluErrorString(error), str);

    This is GL error but not the function error right? Why?

  2. #2
    Newbie OpenGL Pro
    Join Date
    Jan 2007

    Re: glReadPixels error

    Read the documentation - glGetError doesn't necessarily return an error from the function immediately preceding it. There's no evidence that it was glReadPixels that threw the error; in fact if this is the only place you call glGetError in your code the function that caused the error could be anywhere.

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