arch/ogl/sdlgl.c

   1 /* $Id: sdlgl.c,v 1.5 2003-01-15 02:42:41 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
  15 #include "ogl_init.h"
  16 #include "vers_id.h"
  17 #include "error.h"
  18 #include "u_mem.h"
  19 #include "args.h"
  20
  21 static int curx=-1,cury=-1,curfull=0;
  22
  23 void ogl_do_fullscreen_internal(void){
  24         ogl_init_window(curx,cury);
  25 }
  26
  27 void ogl_swap_buffers_internal(void){
  28         SDL_GL_SwapBuffers();
  29 }
  30
  31 int ogl_init_window(int x, int y){
  32         if (gl_initialized){
  33                 if (x==curx && y==cury && curfull==ogl_fullscreen)
  34                         return 0;
  35                 if (ogl_fullscreen || curfull)
  36                         ogl_smash_texture_list_internal();//if we are or were fullscreen, changing vid mode will invalidate current textures
  37         }
  38         SDL_WM_SetCaption(DESCENT_VERSION, "Descent II");
  39         if (!SDL_SetVideoMode(x,y, 16, SDL_OPENGL | (ogl_fullscreen?SDL_FULLSCREEN:0))) {
  40            Error("Could not set %dx%dx16 opengl video mode\n",x,y);
  41         }
  42         SDL_ShowCursor(0);
  43
  44         curx=x;cury=y;curfull=ogl_fullscreen;
  45         gl_initialized=1;
  46
  47         return 0;
  48 }
  49
  50 void ogl_destroy_window(void){
  51         if (gl_initialized){
  52                 ogl_smash_texture_list_internal();
  53                 SDL_ShowCursor(1);
  54                 //gl_initialized=0;
  55                 //well..SDL doesn't really let you kill the window.. so we just need to wait for sdl_quit
  56         }
  57         return;
  58 }
  59
  60 void ogl_init(void){
  61         int t;
  62         if ((t=FindArg("-gl_red")))
  63                 SDL_GL_SetAttribute( SDL_GL_RED_SIZE, atoi(Args[t+1]) );
  64         if ((t=FindArg("-gl_green")))
  65                 SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, atoi(Args[t+1]) );
  66         if ((t=FindArg("-gl_blue")))
  67                 SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, atoi(Args[t+1]) );
  68         if ((t=FindArg("-gl_alpha")))
  69                 SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, atoi(Args[t+1]) );
  70         if ((t=FindArg("-gl_buffer")))
  71                 SDL_GL_SetAttribute( SDL_GL_BUFFER_SIZE, atoi(Args[t+1]) );
  72 //      SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 5 );
  73 //      SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 5 );
  74 //      SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 5 );
  75 //      SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, 8 );
  76
  77
  78         SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE,0);
  79         SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE,0);
  80         SDL_GL_SetAttribute(SDL_GL_ACCUM_RED_SIZE,0);
  81         SDL_GL_SetAttribute(SDL_GL_ACCUM_GREEN_SIZE,0);
  82         SDL_GL_SetAttribute(SDL_GL_ACCUM_BLUE_SIZE,0);
  83         SDL_GL_SetAttribute(SDL_GL_ACCUM_ALPHA_SIZE,0);
  84         SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER,1);
  85
  86 }
  87
  88 void ogl_close(void){
  89 #if 0  // shouldn't really be necessary...
  90         if (ogl_fullscreen){
  91                 ogl_fullscreen=0;
  92                 ogl_do_fullscreen_internal();
  93         }
  94 #endif
  95         ogl_destroy_window();
  96 }