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/*
* Mesa 3-D graphics library
* Version: 3.4
* Copyright (C) 1995-1998 Brian Paul
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* DOS/DJGPP glut driver v1.5 for Mesa
*
* Copyright (C) 2002 - Daniel Borca
* Email : dborca@yahoo.com
* Web : http://www.geocities.com/dborca
*/
#include <stdio.h>
#include "glutint.h"
#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)
{
(void)p;
ticks++;
} ENDOFUNC(ticks_timer)
#else
#include <time.h>
static struct timeval then;
#endif
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 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)
{
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 mod = 0;
int shifts = pc_keyshifts();
if (shifts & (KB_SHIFT_FLAG | KB_CAPSLOCK_FLAG)) {
mod |= GLUT_ACTIVE_SHIFT;
}
if (shifts & KB_ALT_FLAG) {
mod |= GLUT_ACTIVE_ALT;
}
if (shifts & KB_CTRL_FLAG) {
mod |= GLUT_ACTIVE_CTRL;
}
return mod;
}
/* GAME MODE
* Hack alert: incomplete... what is GameMode, anyway?
*/
GLint g_game;
static GLboolean game_possible;
static GLboolean game_active;
static GLuint game_width;
static GLuint game_height;
static GLuint game_bpp;
static GLuint game_refresh;
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;
}
}
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;
}
}
int APIENTRY
glutEnterGameMode (void)
{
if (glutGameModeGet(GLUT_GAME_MODE_POSSIBLE)) {
g_bpp = game_bpp;
g_refresh = game_refresh;
glutInitWindowSize(game_width, game_height);
if ((g_game = glutCreateWindow("<game>")) > 0) {
game_active = GL_TRUE;
}
return g_game;
} else {
return 0;
}
}
void GLUTAPIENTRY
glutLeaveGameMode (void)
{
if (glutGameModeGet(GLUT_GAME_MODE_ACTIVE)) {
game_active = GL_FALSE;
glutDestroyWindow(g_game);
}
}
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