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55 pj 1
/*
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 * Mesa 3-D graphics library
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 * Version:  4.0
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 * Copyright (C) 1995-1998  Brian Paul
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 *
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 * This library is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Library General Public
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 * License as published by the Free Software Foundation; either
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 * version 2 of the License, or (at your option) any later version.
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 *
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 * This library is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Library General Public License for more details.
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 *
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 * You should have received a copy of the GNU Library General Public
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 * License along with this library; if not, write to the Free
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 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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 */
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/*
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 * DOS/DJGPP glut driver v1.0 for Mesa 4.0
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 *
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 *  Copyright (C) 2002 - Borca Daniel
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 *  Email : dborca@yahoo.com
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 *  Web   : http://www.geocities.com/dborca
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 */
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#include "GL/glut.h"
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#include "internal.h"
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void APIENTRY glutInit (int *argcp, char **argv)
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{
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 glutGet(GLUT_ELAPSED_TIME);
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}
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void APIENTRY glutInitDisplayMode (unsigned int mode)
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{
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 g_display_mode = mode;
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 pc_install_keyb();
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 g_mouse = pc_install_mouse();
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}
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void APIENTRY glutInitWindowPosition (int x, int y)
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{
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 g_xpos = x;
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 g_ypos = y;
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}
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void APIENTRY glutInitWindowSize (int width, int height)
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{
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 g_width  = width;
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 g_height = height;
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}
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void APIENTRY glutMainLoop (void)
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{
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 GLboolean idle;
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 static int old_mouse_x = 0;
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 static int old_mouse_y = 0;
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 static int old_mouse_b = 0;
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 glutPostRedisplay();
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 if (reshape_func) reshape_func(g_width, g_height);
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 if (visibility_func) visibility_func(GLUT_VISIBLE);
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 if (g_mouse) pc_show_mouse();
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 while (GL_TRUE) {
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       idle = GL_TRUE;
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       if (g_redisplay && display_func) {
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          idle        = GL_FALSE;
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          g_redisplay = GL_FALSE;
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          if (g_mouse && !(g_display_mode & GLUT_DOUBLE)) pc_scare_mouse();
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          display_func();
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          if (g_mouse && !(g_display_mode & GLUT_DOUBLE)) pc_unscare_mouse();
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       }
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       if (pc_keypressed()) {
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          int key;
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          idle = GL_FALSE;
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          key  = pc_readkey();
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          switch (key>>16) {
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                 case KEY_F1:     if (special_func) special_func(GLUT_KEY_F1,        0, 0); break;
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                 case KEY_F2:     if (special_func) special_func(GLUT_KEY_F2,        0, 0); break;
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                 case KEY_F3:     if (special_func) special_func(GLUT_KEY_F3,        0, 0); break;
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                 case KEY_F4:     if (special_func) special_func(GLUT_KEY_F4,        0, 0); break;
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                 case KEY_F5:     if (special_func) special_func(GLUT_KEY_F5,        0, 0); break;
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                 case KEY_F6:     if (special_func) special_func(GLUT_KEY_F6,        0, 0); break;
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                 case KEY_F7:     if (special_func) special_func(GLUT_KEY_F7,        0, 0); break;
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                 case KEY_F8:     if (special_func) special_func(GLUT_KEY_F8,        0, 0); break;
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                 case KEY_F9:     if (special_func) special_func(GLUT_KEY_F9,        0, 0); break;
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                 case KEY_F10:    if (special_func) special_func(GLUT_KEY_F10,       0, 0); break;
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                 case KEY_F11:    if (special_func) special_func(GLUT_KEY_F11,       0, 0); break;
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                 case KEY_F12:    if (special_func) special_func(GLUT_KEY_F12,       0, 0); break;
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                 case KEY_LEFT:   if (special_func) special_func(GLUT_KEY_LEFT,      0, 0); break;
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                 case KEY_UP:     if (special_func) special_func(GLUT_KEY_UP,        0, 0); break;
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                 case KEY_RIGHT:  if (special_func) special_func(GLUT_KEY_RIGHT,     0, 0); break;
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                 case KEY_DOWN:   if (special_func) special_func(GLUT_KEY_DOWN,      0, 0); break;
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                 case KEY_PGUP:   if (special_func) special_func(GLUT_KEY_PAGE_UP,   0, 0); break;
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                 case KEY_PGDN:   if (special_func) special_func(GLUT_KEY_PAGE_DOWN, 0, 0); break;
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                 case KEY_HOME:   if (special_func) special_func(GLUT_KEY_HOME,      0, 0); break;
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                 case KEY_END:    if (special_func) special_func(GLUT_KEY_END,       0, 0); break;
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                 case KEY_INSERT: if (special_func) special_func(GLUT_KEY_INSERT,    0, 0); break;
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                 default:         if (keyboard_func) keyboard_func(key & 0xFF, 0, 0);
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          }
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       }
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       if (g_mouse) {
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          int mouse_x;
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          int mouse_y;
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          int mouse_b;
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          mouse_b = pc_query_mouse(&mouse_x, &mouse_y);
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          if (motion_func && ((mouse_x != old_mouse_x) || (mouse_y != old_mouse_y))) {
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             idle        = GL_FALSE;
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             old_mouse_x = mouse_x;
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             old_mouse_y = mouse_y;
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             motion_func(old_mouse_x, old_mouse_y);
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          }
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          if (mouse_func && (mouse_b != old_mouse_b)) {
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             int new_mouse_b = mouse_b;
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             if ((old_mouse_b & 1) && !(new_mouse_b & 1))
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                mouse_func(GLUT_LEFT_BUTTON, GLUT_UP,   mouse_x, mouse_y);
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             else if (!(old_mouse_b & 1) && (new_mouse_b & 1))
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                mouse_func(GLUT_LEFT_BUTTON, GLUT_DOWN, mouse_x, mouse_y);
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             if ((old_mouse_b & 2) && !(new_mouse_b & 2))
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                mouse_func(GLUT_RIGHT_BUTTON, GLUT_UP,   mouse_x, mouse_y);
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             else if (!(old_mouse_b & 2) && (new_mouse_b & 2))
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                mouse_func(GLUT_RIGHT_BUTTON, GLUT_DOWN, mouse_x, mouse_y);
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             if ((old_mouse_b & 4) && !(new_mouse_b & 4))
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                mouse_func(GLUT_MIDDLE_BUTTON, GLUT_UP,   mouse_x, mouse_y);
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             else if (!(old_mouse_b & 3) && (new_mouse_b & 4))
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                mouse_func(GLUT_MIDDLE_BUTTON, GLUT_DOWN, mouse_x, mouse_y);
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             idle        = GL_FALSE;
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             old_mouse_b = new_mouse_b;
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          }
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       }
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       if (idle && idle_func)
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          idle_func();
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 }
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}