GLREADBUFFER - Online Linux Manual PageSection : 3G
NAME"glReadBuffer − select a color buffer source for pixels
C SPECIFICATIONvoid glReadBuffer( GLenum mode )
PARAMETERSmode  Specifies a color buffer. Accepted values are ­GL_FRONT_LEFT, ­GL_FRONT_RIGHT, ­GL_BACK_LEFT, ­GL_BACK_RIGHT, ­GL_FRONT, ­GL_BACK, ­GL_LEFT, ­GL_RIGHT, and ­GL_AUXi, where i is between 0 and ­GL_AUX_BUFFERS −1.
DESCRIPTION­glReadBuffer specifies a color buffer as the source for subsequent ­glReadPixels, ­glCopyTexImage1D, ­glCopyTexImage2D, ­glCopyTexSubImage1D, ­glCopyTexSubImage2D, ­glCopyTexSubImage3D, and ­glCopyPixels commands. mode accepts one of twelve or more predefined values. (­GL_AUX0 through ­GL_AUX3 are always defined.) In a fully configured system, ­GL_FRONT, ­GL_LEFT, and ­GL_FRONT_LEFT all name the front left buffer, ­GL_FRONT_RIGHT and ­GL_RIGHT name the front right buffer, and ­GL_BACK_LEFT and ­GL_BACK name the back left buffer. Nonstereo double-buffered configurations have only a front left and a back left buffer. Single-buffered configurations have a front left and a front right buffer if stereo, and only a front left buffer if nonstereo. It is an error to specify a nonexistent buffer to ­glReadBuffer. mode is initially ­GL_FRONT in single-buffered configurations, and ­GL_BACK in double-buffered configurations.
ERRORS­GL_INVALID_ENUM is generated if mode is not one of the twelve (or more) accepted values. ­GL_INVALID_OPERATION is generated if mode specifies a buffer that does not exist. ­GL_INVALID_OPERATION is generated if ­glReadBuffer is executed between the execution of ­glBegin and the corresponding execution of ­glEnd.
ASSOCIATED GETS­glGet with argument ­GL_READ_BUFFER
SEE ALSO­glCopyPixels(3G), ­glCopyTexImage1D(3G), ­glCopyTexImage2D(3G), ­glCopyTexSubImage1D(3G), ­glCopyTexSubImage2D(3G), ­glCopyTexSubImage3D(3G), ­glDrawBuffer(3G), ­glReadPixels(3G) 0
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Online Linux Manual Page   :   Version   :   Online Linux Manual Page - Fedora.40 - march=x86-64 - mtune=generic - 24.12.29
Online Linux Manual Page   :   Library   :   lib_c - 24.10.03 - march=x86-64 - mtune=generic - Fedora.40
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