glflush(3g) [centos man page]
GLFLUSH(3G) OpenGL Manual GLFLUSH(3G) NAME
glFlush - force execution of GL commands in finite time C SPECIFICATION
void glFlush(void); DESCRIPTION
Different GL implementations buffer commands in several different locations, including network buffers and the graphics accelerator itself. glFlush empties all of these buffers, causing all issued commands to be executed as quickly as they are accepted by the actual rendering engine. Though this execution may not be completed in any particular time period, it does complete in finite time. Because any GL program might be executed over a network, or on an accelerator that buffers commands, all programs should call glFlush whenever they count on having all of their previously issued commands completed. For example, call glFlush before waiting for user input that depends on the generated image. NOTES
glFlush can return at any time. It does not wait until the execution of all previously issued GL commands is complete. SEE ALSO
glFinish() COPYRIGHT
Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/. AUTHORS
opengl.org opengl.org 06/10/2014 GLFLUSH(3G)
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GLNEWLIST(3G) OpenGL Manual GLNEWLIST(3G) NAME
glNewList - create or replace a display list C SPECIFICATION
void glNewList(GLuint list, GLenum mode); PARAMETERS
list Specifies the display-list name. mode Specifies the compilation mode, which can be GL_COMPILE or GL_COMPILE_AND_EXECUTE. C SPECIFICATION
void glEndList(void); DESCRIPTION
Display lists are groups of GL commands that have been stored for subsequent execution. Display lists are created with glNewList. All subsequent commands are placed in the display list, in the order issued, until glEndList() is called. glNewList has two arguments. The first argument, list, is a positive integer that becomes the unique name for the display list. Names can be created and reserved with glGenLists() and tested for uniqueness with glIsList(). The second argument, mode, is a symbolic constant that can assume one of two values: GL_COMPILE Commands are merely compiled. GL_COMPILE_AND_EXECUTE Commands are executed as they are compiled into the display list. Certain commands are not compiled into the display list but are executed immediately, regardless of the display-list mode. These commands are glAreTexturesResident(), glColorPointer(), glDeleteLists(), glDeleteTextures(), glDisableClientState(), glEdgeFlagPointer(), glEnableClientState(), glFeedbackBuffer(), glFinish(), glFlush(), glGenLists(), glGenTextures(), glIndexPointer(), glInterleavedArrays(), glIsEnabled(), glIsList(), glIsTexture(), glNormalPointer(), glPopClientAttrib(), glPixelStore(), glPushClientAttrib(), glReadPixels(), glRenderMode(), glSelectBuffer(), glTexCoordPointer(), glVertexPointer(), and all of the glGet() commands. Similarly, glTexImage1D(), glTexImage2D(), and glTexImage3D() are executed immediately and not compiled into the display list when their first argument is GL_PROXY_TEXTURE_1D, GL_PROXY_TEXTURE_1D, or GL_PROXY_TEXTURE_3D, respectively. When the ARB_imaging extension is supported, glHistogram() executes immediately when its argument is GL_PROXY_HISTOGRAM. Similarly, glColorTable() executes immediately when its first argument is GL_PROXY_COLOR_TABLE, GL_PROXY_POST_CONVOLUTION_COLOR_TABLE, or GL_PROXY_POST_COLOR_MATRIX_COLOR_TABLE. For OpenGL versions 1.3 and greater, or when the ARB_multitexture extension is supported, glClientActiveTexture() is not compiled into display lists, but executed immediately. When glEndList() is encountered, the display-list definition is completed by associating the list with the unique name list (specified in the glNewList command). If a display list with name list already exists, it is replaced only when glEndList() is called. NOTES
glCallList() and glCallLists() can be entered into display lists. Commands in the display list or lists executed by glCallList() or glCallLists() are not included in the display list being created, even if the list creation mode is GL_COMPILE_AND_EXECUTE. A display list is just a group of commands and arguments, so errors generated by commands in a display list must be generated when the list is executed. If the list is created in GL_COMPILE mode, errors are not generated until the list is executed. ERRORS
GL_INVALID_VALUE is generated if list is 0. GL_INVALID_ENUM is generated if mode is not an accepted value. GL_INVALID_OPERATION is generated if glEndList() is called without a preceding glNewList, or if glNewList is called while a display list is being defined. GL_INVALID_OPERATION is generated if glNewList or glEndList() is executed between the execution of glBegin() and the corresponding execution of glEnd(). GL_OUT_OF_MEMORY is generated if there is insufficient memory to compile the display list. If the GL version is 1.1 or greater, no change is made to the previous contents of the display list, if any, and no other change is made to the GL state. (It is as if no attempt had been made to create the new display list.) ASSOCIATED GETS
glIsList() glGet() with argument GL_LIST_INDEX glGet() with argument GL_LIST_MODE SEE ALSO
glCallList(), glCallLists(), glDeleteLists(), glGenLists() COPYRIGHT
Copyright (C) 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/. AUTHORS
opengl.org opengl.org 06/10/2014 GLNEWLIST(3G)