arch/ogl/sdlgl.c

   1 /* $Id: sdlgl.c,v 1.8 2003-11-06 23:28:47 btb Exp $ */
   2 /*
   3  *
   4  * Graphics functions for SDL-GL.
   5  *
   6  *
   7  */
   8
   9 #ifdef HAVE_CONFIG_H
  10 #include <conf.h>
  11 #endif
  12
  13 #include <SDL.h>
  14 #ifdef SDL_IMAGE
  15 #include <SDL_image.h>
  16 #endif
  17
  18 #include "ogl_init.h"
  19 #include "vers_id.h"
  20 #include "error.h"
  21 #include "u_mem.h"
  22 #include "args.h"
  23
  24 static int curx=-1,cury=-1,curfull=0;
  25
  26 void ogl_do_fullscreen_internal(void){
  27         ogl_init_window(curx,cury);
  28 }
  29
  30 void ogl_swap_buffers_internal(void){
  31         SDL_GL_SwapBuffers();
  32 }
  33
  34 int ogl_init_window(int x, int y){
  35         if (gl_initialized){
  36                 if (x==curx && y==cury && curfull==ogl_fullscreen)
  37                         return 0;
  38 #ifdef __linux__ // Windows, at least, seems to need to reload every time.
  39                 if (ogl_fullscreen || curfull)
  40 #endif
  41                         ogl_smash_texture_list_internal();//if we are or were fullscreen, changing vid mode will invalidate current textures
  42         }
  43         SDL_WM_SetCaption(DESCENT_VERSION, "Descent II");
  44
  45 #ifdef SDL_IMAGE
  46         {
  47 #include "descent.xpm"
  48                 SDL_WM_SetIcon(IMG_ReadXPMFromArray(pixmap), NULL);
  49         }
  50 #endif
  51
  52         if (!SDL_SetVideoMode(x,y, 16, SDL_OPENGL | (ogl_fullscreen?SDL_FULLSCREEN:0))) {
  53            Error("Could not set %dx%dx16 opengl video mode\n",x,y);
  54         }
  55         SDL_ShowCursor(0);
  56
  57         curx=x;cury=y;curfull=ogl_fullscreen;
  58         gl_initialized=1;
  59
  60         return 0;
  61 }
  62
  63 void ogl_destroy_window(void){
  64         if (gl_initialized){
  65                 ogl_smash_texture_list_internal();
  66                 SDL_ShowCursor(1);
  67                 //gl_initialized=0;
  68                 //well..SDL doesn't really let you kill the window.. so we just need to wait for sdl_quit
  69         }
  70         return;
  71 }
  72
  73 void ogl_init(void){
  74         int t;
  75         if ((t=FindArg("-gl_red")))
  76                 SDL_GL_SetAttribute( SDL_GL_RED_SIZE, atoi(Args[t+1]) );
  77         if ((t=FindArg("-gl_green")))
  78                 SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, atoi(Args[t+1]) );
  79         if ((t=FindArg("-gl_blue")))
  80                 SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, atoi(Args[t+1]) );
  81         if ((t=FindArg("-gl_alpha")))
  82                 SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, atoi(Args[t+1]) );
  83         if ((t=FindArg("-gl_buffer")))
  84                 SDL_GL_SetAttribute( SDL_GL_BUFFER_SIZE, atoi(Args[t+1]) );
  85 //      SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 5 );
  86 //      SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 5 );
  87 //      SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 5 );
  88 //      SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, 8 );
  89
  90
  91         SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE,0);
  92         SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE,0);
  93         SDL_GL_SetAttribute(SDL_GL_ACCUM_RED_SIZE,0);
  94         SDL_GL_SetAttribute(SDL_GL_ACCUM_GREEN_SIZE,0);
  95         SDL_GL_SetAttribute(SDL_GL_ACCUM_BLUE_SIZE,0);
  96         SDL_GL_SetAttribute(SDL_GL_ACCUM_ALPHA_SIZE,0);
  97         SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER,1);
  98
  99 }
 100
 101 void ogl_close(void){
 102 #if 0  // shouldn't really be necessary...
 103         if (ogl_fullscreen){
 104                 ogl_fullscreen=0;
 105                 ogl_do_fullscreen_internal();
 106         }
 107 #endif
 108         ogl_destroy_window();
 109 }