diff options
Diffstat (limited to 'nx-X11/extras/Mesa_6.4.1/src/glut/glx/glut_swap.c')
-rw-r--r-- | nx-X11/extras/Mesa_6.4.1/src/glut/glx/glut_swap.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/nx-X11/extras/Mesa_6.4.1/src/glut/glx/glut_swap.c b/nx-X11/extras/Mesa_6.4.1/src/glut/glx/glut_swap.c new file mode 100644 index 000000000..4831b8eb3 --- /dev/null +++ b/nx-X11/extras/Mesa_6.4.1/src/glut/glx/glut_swap.c @@ -0,0 +1,67 @@ + +/* 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 <stdio.h> +#include "glutint.h" + +GLint __glutFPS = 0; +GLint __glutSwapCount = 0; +GLint __glutSwapTime = 0; + +/* CENTRY */ +void GLUTAPIENTRY +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. */ + + if (__glutFPS) { + GLint t = glutGet(GLUT_ELAPSED_TIME); + __glutSwapCount++; + if (__glutSwapTime == 0) + __glutSwapTime = t; + else if (t - __glutSwapTime > __glutFPS) { + float time = 0.001 * (t - __glutSwapTime); + float fps = (float) __glutSwapCount / time; + fprintf(stderr, "GLUT: %d frames in %.2f seconds = %.2f FPS\n", + __glutSwapCount, time, fps); + __glutSwapTime = t; + __glutSwapCount = 0; + } + } +} +/* ENDCENTRY */ |