changed coding style. added possibility to use default timer instead of PC/HW timer.

1 files changed, 146 insertions, 130 deletions

diff --git a/src/glut/dos/state.c b/src/glut/dos/state.c
index b245569610..4f74f24304 100644
--- a/src/glut/dos/state.c
+++ b/src/glut/dos/state.c
@@ -19,9 +19,9 @@
  */
 
 /*
- * DOS/DJGPP glut driver v1.4 for Mesa
+ * DOS/DJGPP glut driver v1.5 for Mesa
  *
- *  Copyright (C) 2002 - Borca Daniel
+ *  Copyright (C) 2002 - Daniel Borca
  *  Email : dborca@yahoo.com
  *  Web   : http://www.geocities.com/dborca
  */
@@ -32,119 +32,135 @@
 #include "glutint.h"
 
 
-
-#define FREQUENCY 100
-
+#define FREQUENCY 100 /* set this to zero to use the default timer */
 
 
 static int timer_installed;
+#if FREQUENCY
 static volatile int ticks;
 
 
-
-static void ticks_timer (void *p)
+static void
+ticks_timer (void *p)
 {
- (void)p;
- ticks++;
+   (void)p;
+   ticks++;
 } ENDOFUNC(ticks_timer)
+#else
+#include <time.h>
 
+static struct timeval then;
+#endif
 
 
-int APIENTRY glutGet (GLenum type)
+int APIENTRY
+glutGet (GLenum type)
 {
- switch (type) {
-        case GLUT_WINDOW_X:
-             return g_curwin->xpos;
-        case GLUT_WINDOW_Y:
-             return g_curwin->ypos;
-        case GLUT_WINDOW_WIDTH:
-             return g_curwin->width;
-        case GLUT_WINDOW_HEIGHT:
-             return g_curwin->height;
-        case GLUT_WINDOW_STENCIL_SIZE:
-             return g_stencil;
-        case GLUT_WINDOW_DEPTH_SIZE:
-             return g_depth;
-        case GLUT_WINDOW_RGBA:
-             return !(g_display_mode & GLUT_INDEX);
-        case GLUT_WINDOW_COLORMAP_SIZE:
-             return (g_display_mode & GLUT_INDEX) ? (256 - RESERVED_COLORS) : 0;
-        case GLUT_SCREEN_WIDTH:
-             return g_screen_w;
-        case GLUT_SCREEN_HEIGHT:
-             return g_screen_h;
-        case GLUT_INIT_WINDOW_X:
-             return g_init_x;
-        case GLUT_INIT_WINDOW_Y:
-             return g_init_y;
-        case GLUT_INIT_WINDOW_WIDTH:
-             return g_init_w;
-        case GLUT_INIT_WINDOW_HEIGHT:
-             return g_init_h;
-        case GLUT_INIT_DISPLAY_MODE:
-             return g_display_mode;
-        case GLUT_ELAPSED_TIME:
-             if (!timer_installed) {
-                timer_installed = GL_TRUE;
-                LOCKDATA(ticks);
-                LOCKFUNC(ticks_timer);
-                pc_install_int(ticks_timer, NULL, FREQUENCY);
-             }
-             return ticks*1000/FREQUENCY;
-        default:
-             return -1;
- }
+   switch (type) {
+      case GLUT_WINDOW_X:
+         return g_curwin->xpos;
+      case GLUT_WINDOW_Y:
+         return g_curwin->ypos;
+      case GLUT_WINDOW_WIDTH:
+         return g_curwin->width;
+      case GLUT_WINDOW_HEIGHT:
+         return g_curwin->height;
+      case GLUT_WINDOW_STENCIL_SIZE:
+         return g_stencil;
+      case GLUT_WINDOW_DEPTH_SIZE:
+         return g_depth;
+      case GLUT_WINDOW_RGBA:
+         return !(g_display_mode & GLUT_INDEX);
+      case GLUT_WINDOW_COLORMAP_SIZE:
+         return (g_display_mode & GLUT_INDEX) ? (256 - RESERVED_COLORS) : 0;
+      case GLUT_SCREEN_WIDTH:
+         return g_screen_w;
+      case GLUT_SCREEN_HEIGHT:
+         return g_screen_h;
+      case GLUT_INIT_WINDOW_X:
+         return g_init_x;
+      case GLUT_INIT_WINDOW_Y:
+         return g_init_y;
+      case GLUT_INIT_WINDOW_WIDTH:
+         return g_init_w;
+      case GLUT_INIT_WINDOW_HEIGHT:
+         return g_init_h;
+      case GLUT_INIT_DISPLAY_MODE:
+         return g_display_mode;
+      case GLUT_ELAPSED_TIME:
+#if FREQUENCY
+         if (!timer_installed) {
+            timer_installed = GL_TRUE;
+            LOCKDATA(ticks);
+            LOCKFUNC(ticks_timer);
+            pc_install_int(ticks_timer, NULL, FREQUENCY);
+         }
+         return ticks * 1000 / FREQUENCY;
+#else
+         if (!timer_installed) {
+            timer_installed = GL_TRUE;
+            gettimeofday(&then, NULL);
+            return 0;
+         } else {
+            struct timeval now;
+            gettimeofday(&now, NULL);
+            return (now.tv_usec - then.tv_usec) / 1000 +
+                   (now.tv_sec  - then.tv_sec)  * 1000;
+         }
+#endif
+      default:
+         return -1;
+   }
 }
 
 
-
-int APIENTRY glutDeviceGet (GLenum type)
+int APIENTRY
+glutDeviceGet (GLenum type)
 {
- switch (type) {
-        case GLUT_HAS_KEYBOARD:
-             return GL_TRUE;
-        case GLUT_HAS_MOUSE:
-             return (g_mouse != 0);
-        case GLUT_NUM_MOUSE_BUTTONS:
-             return g_mouse;
-        case GLUT_HAS_SPACEBALL:
-        case GLUT_HAS_DIAL_AND_BUTTON_BOX:
-        case GLUT_HAS_TABLET:
-             return GL_FALSE;
-        case GLUT_NUM_SPACEBALL_BUTTONS:
-        case GLUT_NUM_BUTTON_BOX_BUTTONS:
-        case GLUT_NUM_DIALS:
-        case GLUT_NUM_TABLET_BUTTONS:
-             return 0;
-        default:
-             return -1;
- }
+   switch (type) {
+      case GLUT_HAS_KEYBOARD:
+         return GL_TRUE;
+      case GLUT_HAS_MOUSE:
+         return (g_mouse != 0);
+      case GLUT_NUM_MOUSE_BUTTONS:
+         return g_mouse;
+      case GLUT_HAS_SPACEBALL:
+      case GLUT_HAS_DIAL_AND_BUTTON_BOX:
+      case GLUT_HAS_TABLET:
+         return GL_FALSE;
+      case GLUT_NUM_SPACEBALL_BUTTONS:
+      case GLUT_NUM_BUTTON_BOX_BUTTONS:
+      case GLUT_NUM_DIALS:
+      case GLUT_NUM_TABLET_BUTTONS:
+         return 0;
+      default:
+         return -1;
+   }
 }
 
 
-
-int APIENTRY glutGetModifiers (void)
+int APIENTRY
+glutGetModifiers (void)
 {
- int mod = 0;
- int shifts = pc_keyshifts();
+   int mod = 0;
+   int shifts = pc_keyshifts();
 
- if (shifts & (KB_SHIFT_FLAG | KB_CAPSLOCK_FLAG)) {
-    mod |= GLUT_ACTIVE_SHIFT;
- }
+   if (shifts & (KB_SHIFT_FLAG | KB_CAPSLOCK_FLAG)) {
+      mod |= GLUT_ACTIVE_SHIFT;
+   }
 
- if (shifts & KB_ALT_FLAG) {
-    mod |= GLUT_ACTIVE_ALT;
- }
+   if (shifts & KB_ALT_FLAG) {
+      mod |= GLUT_ACTIVE_ALT;
+   }
 
- if (shifts & KB_CTRL_FLAG) {
-    mod |= GLUT_ACTIVE_CTRL;
- }
+   if (shifts & KB_CTRL_FLAG) {
+      mod |= GLUT_ACTIVE_CTRL;
+   }
 
- return mod;
+   return mod;
 }
 
 
-
 /* GAME MODE
  * Hack alert: incomplete... what is GameMode, anyway?
  */
@@ -157,63 +173,63 @@ static GLuint game_bpp;
 static GLuint game_refresh;
 
 
-
-void APIENTRY glutGameModeString (const char *string)
+void APIENTRY
+glutGameModeString (const char *string)
 {
- if (sscanf(string, "%ux%u:%u@%u", &game_width, &game_height, &game_bpp, &game_refresh) == 4) {
-    game_possible = GL_TRUE;
- }
+   if (sscanf(string, "%ux%u:%u@%u", &game_width, &game_height, &game_bpp, &game_refresh) == 4) {
+      game_possible = GL_TRUE;
+   }
 }
 
 
-
-int APIENTRY glutGameModeGet (GLenum mode)
+int APIENTRY
+glutGameModeGet (GLenum mode)
 {
- switch (mode) {
-        case GLUT_GAME_MODE_ACTIVE:
-             return game_active;
-        case GLUT_GAME_MODE_POSSIBLE:
-             return game_possible && !g_curwin;
-        case GLUT_GAME_MODE_WIDTH:
-             return game_active ? (int)game_width : -1;
-        case GLUT_GAME_MODE_HEIGHT:
-             return game_active ? (int)game_height : -1;
-        case GLUT_GAME_MODE_PIXEL_DEPTH:
-             return game_active ? (int)game_bpp : -1;
-        case GLUT_GAME_MODE_REFRESH_RATE:
-             return game_active ? (int)game_refresh : -1;
-        default:
-             return -1;
- }
+   switch (mode) {
+      case GLUT_GAME_MODE_ACTIVE:
+         return game_active;
+      case GLUT_GAME_MODE_POSSIBLE:
+         return game_possible && !g_curwin;
+      case GLUT_GAME_MODE_WIDTH:
+         return game_active ? (int)game_width : -1;
+      case GLUT_GAME_MODE_HEIGHT:
+         return game_active ? (int)game_height : -1;
+      case GLUT_GAME_MODE_PIXEL_DEPTH:
+         return game_active ? (int)game_bpp : -1;
+      case GLUT_GAME_MODE_REFRESH_RATE:
+         return game_active ? (int)game_refresh : -1;
+      default:
+         return -1;
+   }
 }
 
 
-
-int APIENTRY glutEnterGameMode (void)
+int APIENTRY
+glutEnterGameMode (void)
 {
- if (glutGameModeGet(GLUT_GAME_MODE_POSSIBLE)) {
-    g_bpp = game_bpp;
-    g_refresh = game_refresh;
+   if (glutGameModeGet(GLUT_GAME_MODE_POSSIBLE)) {
+      g_bpp = game_bpp;
+      g_refresh = game_refresh;
 
-    glutInitWindowSize(game_width, game_height);
+      glutInitWindowSize(game_width, game_height);
 
-    if ((g_game = glutCreateWindow("<game>")) > 0) {
-       game_active = GL_TRUE;
-    }
+      if ((g_game = glutCreateWindow("<game>")) > 0) {
+         game_active = GL_TRUE;
+      }
 
-    return g_game;
- } else {
-    return 0;
- }
+      return g_game;
+   } else {
+      return 0;
+   }
 }
 
 
-
-void GLUTAPIENTRY glutLeaveGameMode (void)
+void GLUTAPIENTRY
+glutLeaveGameMode (void)
 {
- if (glutGameModeGet(GLUT_GAME_MODE_ACTIVE)) {
-    game_active = GL_FALSE;
+   if (glutGameModeGet(GLUT_GAME_MODE_ACTIVE)) {
+      game_active = GL_FALSE;
 
-    glutDestroyWindow(g_game);
- }
+      glutDestroyWindow(g_game);
+   }
 }