4 * Display message posting, context buffer swapping.
6 * Copyright (c) 1999-2000 Pawel W. Olszta. All Rights Reserved.
7 * Written by Pawel W. Olszta, <olszta@sourceforge.net>
8 * Creation date: Fri Dec 3 1999
10 * Permission is hereby granted, free of charge, to any person obtaining a
11 * copy of this software and associated documentation files (the "Software"),
12 * to deal in the Software without restriction, including without limitation
13 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
14 * and/or sell copies of the Software, and to permit persons to whom the
15 * Software is furnished to do so, subject to the following conditions:
17 * The above copyright notice and this permission notice shall be included
18 * in all copies or substantial portions of the Software.
20 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
21 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
23 * PAWEL W. OLSZTA BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
24 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
25 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
32 #include "../include/GL/freeglut.h"
33 #include "freeglut_internal.h"
36 /* -- INTERFACE FUNCTIONS -------------------------------------------------- */
39 * Marks the current window to have the redisplay performed when possible...
41 void FGAPIENTRY glutPostRedisplay( void )
43 freeglut_assert_ready;
44 freeglut_assert_window;
45 fgStructure.Window->State.Redisplay = TRUE;
49 * Swaps the buffers for the current window (if any)
51 void FGAPIENTRY glutSwapBuffers( void )
53 freeglut_assert_ready;
54 freeglut_assert_window;
57 if ( ! fgStructure.Window->Window.DoubleBuffered )
60 #if TARGET_HOST_UNIX_X11
61 glXSwapBuffers( fgDisplay.Display, fgStructure.Window->Window.Handle );
62 #elif TARGET_HOST_WIN32
63 SwapBuffers( fgStructure.Window->Window.Device );
66 /* GLUT_FPS env var support */
67 if (fgState.FPSInterval) {
68 GLint t = glutGet(GLUT_ELAPSED_TIME);
70 if (fgState.SwapTime == 0)
72 else if (t - fgState.SwapTime > fgState.FPSInterval) {
73 float time = 0.001f * (t - fgState.SwapTime);
74 float fps = (float) fgState.SwapCount / time;
75 fprintf(stderr, "freeglut: %d frames in %.2f seconds = %.2f FPS\n",
76 fgState.SwapCount, time, fps);
78 fgState.SwapCount = 0;
84 * Mark appropriate window to be displayed
86 void FGAPIENTRY glutPostWindowRedisplay( int windowID )
90 freeglut_assert_ready;
91 window = fgWindowByID( windowID );
92 freeglut_return_if_fail( window != NULL );
93 window->State.Redisplay = TRUE;