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Shell Programming and Scripting
perl - why is the shell script executed before the print command?
Post 302137013 by cbkihong on Friday 21st of September 2007 05:19:23 AM
09-21-2007
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LEARN ABOUT REDHAT
glreadbuffer
GLREADBUFFER(3G) GLREADBUFFER(3G) NAME
glReadBuffer - select a color buffer source for pixels C SPECIFICATION
void glReadBuffer( GLenum mode ) PARAMETERS
mode 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. DESCRIPTION
glReadBuffer 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. ERRORS
GL_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 GETS
glGet with argument GL_READ_BUFFER SEE ALSO
glCopyPixels(3G), glCopyTexImage1D(3G), glCopyTexImage2D(3G), glCopyTexSubImage1D(3G), glCopyTexSubImage2D(3G), glCopyTexSubImage3D(3G), glDrawBuffer(3G), glReadPixels(3G) GLREADBUFFER(3G)