landscape fixes, implemented gr_check_mode
[btb/d2x.git] / arch / ogl / sdlgl.c
1 /* $Id: sdlgl.c,v 1.9 2003-11-27 04:59:49 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
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 }