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authorBrian Paul <brian.paul@tungstengraphics.com>2002-08-17 00:12:12 +0000
committerBrian Paul <brian.paul@tungstengraphics.com>2002-08-17 00:12:12 +0000
commit46a035f76d3b7a2355f7655c9dd7e519d4238cdc (patch)
tree79178916830b7f890b66fa5f78305c8305a28a41
parent10730663a128c35c0241a79d885665e6272014d7 (diff)
added glutGetProcAddress() and GLUT_FPS env var option
-rw-r--r--src/glut/glx/glut_ext.c15
-rw-r--r--src/glut/glx/glut_init.c10
-rw-r--r--src/glut/glx/glut_swap.c20
-rw-r--r--src/glut/glx/glutint.h5
4 files changed, 50 insertions, 0 deletions
diff --git a/src/glut/glx/glut_ext.c b/src/glut/glx/glut_ext.c
index abcb17a911..ceea4ca15a 100644
--- a/src/glut/glx/glut_ext.c
+++ b/src/glut/glx/glut_ext.c
@@ -50,4 +50,19 @@ glutExtensionSupported(const char *extension)
return 0;
}
+
+/* XXX This isn't an official GLUT function, yet */
+void * APIENTRY
+glutGetProcAddress(const char *procName)
+{
+#if defined(_WIN32)
+ return (void *) wglGetProcAddress((LPCSTR) procName);
+#elif defined(GLX_ARB_get_proc_address)
+ return (void *) glXGetProcAddressARB((const GLubyte *) procName);
+#else
+ return NULL;
+#endif
+}
+
+
/* ENDCENTRY */
diff --git a/src/glut/glx/glut_init.c b/src/glut/glx/glut_init.c
index dcd423a941..d814479db0 100644
--- a/src/glut/glx/glut_init.c
+++ b/src/glut/glx/glut_init.c
@@ -331,6 +331,16 @@ glutInit(int *argcp, char **argv)
glutInitWindowPosition(__glutInitX, __glutInitY);
}
__glutInitTime(&unused);
+
+ /* check if GLUT_FPS env var is set */
+ {
+ const char *fps = getenv("GLUT_FPS");
+ if (fps) {
+ sscanf(fps, "%d", &__glutFPS);
+ if (__glutFPS <= 0)
+ __glutFPS = 5000; /* 5000 milliseconds */
+ }
+ }
}
#ifdef _WIN32
diff --git a/src/glut/glx/glut_swap.c b/src/glut/glx/glut_swap.c
index 0864e58d42..cb3f653c72 100644
--- a/src/glut/glx/glut_swap.c
+++ b/src/glut/glx/glut_swap.c
@@ -5,8 +5,13 @@
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 APIENTRY
glutSwapBuffers(void)
@@ -43,5 +48,20 @@ glutSwapBuffers(void)
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 */
diff --git a/src/glut/glx/glutint.h b/src/glut/glx/glutint.h
index b0d6c86b7c..5e06bfc435 100644
--- a/src/glut/glx/glutint.h
+++ b/src/glut/glx/glutint.h
@@ -798,6 +798,11 @@ extern void __glutDetermineMesaSwapHackSupport(void);
/* private routines from glut_gameglut.c */
extern void GLUTAPIENTRYV __glutCloseDownGameMode(void);
+/* private variables from glut_swap.c (BrianP) */
+extern GLint __glutFPS;
+extern GLint __glutSwapCount;
+extern GLint __glutSwapTime;
+
#if defined(_WIN32)
/* private routines from win32_*.c */
extern LONG WINAPI __glutWindowProc(HWND win, UINT msg, WPARAM w, LPARAM l);