glut_swap.c
上传用户:xk288cn
上传日期:2007-05-28
资源大小:4876k
文件大小:2k
- /* Copyright (c) Mark J. Kilgard, 1994, 1997. */
- /* This program is freely distributable without licensing fees
- and is provided without guarantee or warrantee expressed or
- implied. This program is -not- in the public domain. */
- #include "glutint.h"
- /* CENTRY */
- void APIENTRY
- glutSwapBuffers(void)
- {
- GLUTwindow *window = __glutCurrentWindow;
- if (window->renderWin == window->win) {
- if (__glutCurrentWindow->treatAsSingle) {
- /* Pretend the double buffered window is single buffered,
- so treat glutSwapBuffers as a no-op. */
- return;
- }
- } else {
- if (__glutCurrentWindow->overlay->treatAsSingle) {
- /* Pretend the double buffered overlay is single
- buffered, so treat glutSwapBuffers as a no-op. */
- return;
- }
- }
- /* For the MESA_SWAP_HACK. */
- window->usedSwapBuffers = 1;
- SWAP_BUFFERS_LAYER(__glutCurrentWindow);
- /* I considered putting the window being swapped on the
- GLUT_FINISH_WORK work list because you could call
- glutSwapBuffers from an idle callback which doesn't call
- __glutSetWindow which normally adds indirect rendering
- windows to the GLUT_FINISH_WORK work list. Not being put
- on the list could lead to the buffering up of multiple
- redisplays and buffer swaps and hamper interactivity. I
- consider this an application bug due to not using
- glutPostRedisplay to trigger redraws. If
- glutPostRedisplay were used, __glutSetWindow would be
- called and a glFinish to throttle buffering would occur. */
- }
- /* ENDCENTRY */