arch/ogl/sdlgl.c

   1 /* $Id: sdlgl.c,v 1.10 2004-05-16 00:45:25 schaffner 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 "internal.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
  35 int ogl_check_mode(int x, int y)
  36 {
  37         return !SDL_VideoModeOK(x, y, 16, SDL_OPENGL | (ogl_fullscreen?SDL_FULLSCREEN:0));
  38 }
  39
  40
  41 int ogl_init_window(int x, int y){
  42         if (gl_initialized){
  43                 if (x==curx && y==cury && curfull==ogl_fullscreen)
  44                         return 0;
  45 #ifdef __linux__ // Windows, at least, seems to need to reload every time.
  46                 if (ogl_fullscreen || curfull)
  47 #endif
  48                         ogl_smash_texture_list_internal();//if we are or were fullscreen, changing vid mode will invalidate current textures
  49         }
  50         SDL_WM_SetCaption(DESCENT_VERSION, "Descent II");
  51
  52 #ifdef SDL_IMAGE
  53         {
  54 #include "descent.xpm"
  55                 SDL_WM_SetIcon(IMG_ReadXPMFromArray(pixmap), NULL);
  56         }
  57 #endif
  58
  59         if (!SDL_SetVideoMode(x,y, 16, SDL_OPENGL | (ogl_fullscreen?SDL_FULLSCREEN:0))) {
  60            Error("Could not set %dx%dx16 opengl video mode\n",x,y);
  61         }
  62         SDL_ShowCursor(0);
  63
  64         curx=x;cury=y;curfull=ogl_fullscreen;
  65         gl_initialized=1;
  66
  67         return 0;
  68 }
  69
  70 void ogl_destroy_window(void){
  71         if (gl_initialized){
  72                 ogl_smash_texture_list_internal();
  73                 SDL_ShowCursor(1);
  74                 //gl_initialized=0;
  75                 //well..SDL doesn't really let you kill the window.. so we just need to wait for sdl_quit
  76         }
  77         return;
  78 }
  79
  80 void ogl_init(void){
  81         int t;
  82         if ((t=FindArg("-gl_red")))
  83                 SDL_GL_SetAttribute( SDL_GL_RED_SIZE, atoi(Args[t+1]) );
  84         if ((t=FindArg("-gl_green")))
  85                 SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, atoi(Args[t+1]) );
  86         if ((t=FindArg("-gl_blue")))
  87                 SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, atoi(Args[t+1]) );
  88         if ((t=FindArg("-gl_alpha")))
  89                 SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, atoi(Args[t+1]) );
  90         if ((t=FindArg("-gl_buffer")))
  91                 SDL_GL_SetAttribute( SDL_GL_BUFFER_SIZE, atoi(Args[t+1]) );
  92 //      SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 5 );
  93 //      SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 5 );
  94 //      SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 5 );
  95 //      SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, 8 );
  96
  97
  98         SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE,0);
  99         SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE,0);
 100         SDL_GL_SetAttribute(SDL_GL_ACCUM_RED_SIZE,0);
 101         SDL_GL_SetAttribute(SDL_GL_ACCUM_GREEN_SIZE,0);
 102         SDL_GL_SetAttribute(SDL_GL_ACCUM_BLUE_SIZE,0);
 103         SDL_GL_SetAttribute(SDL_GL_ACCUM_ALPHA_SIZE,0);
 104         SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER,1);
 105
 106 }
 107
 108 void ogl_close(void){
 109 #if 0  // shouldn't really be necessary...
 110         if (ogl_fullscreen){
 111                 ogl_fullscreen=0;
 112                 ogl_do_fullscreen_internal();
 113         }
 114 #endif
 115         ogl_destroy_window();
 116 }