diff options
| author | Brian Paul <[email protected]> | 2003-06-13 21:49:46 +0000 |
|---|---|---|
| committer | Brian Paul <[email protected]> | 2003-06-13 21:49:46 +0000 |
| commit | 225517aff0afc3270fab277d1c9ac2864053820c (patch) | |
| tree | fa00e2b162788b4fe2ebb9254baf6526997c9903 /src/glut/os2/glut_swap.cpp | |
| parent | 8fa507592b7bdb087c9eb32ed2322cb805b724ec (diff) | |
GLUT for OS/2 (Evgeny Kotsuba)
Diffstat (limited to 'src/glut/os2/glut_swap.cpp')
| -rw-r--r-- | src/glut/os2/glut_swap.cpp | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/src/glut/os2/glut_swap.cpp b/src/glut/os2/glut_swap.cpp new file mode 100644 index 00000000000..210a7fc37e0 --- /dev/null +++ b/src/glut/os2/glut_swap.cpp @@ -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 */
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