84 lines
2 KiB
C
Executable file
84 lines
2 KiB
C
Executable file
//opengl platform specific functions for SDL - Added 2000/06/19 Matthew Mueller
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#include <SDL/SDL.h>
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#include "ogl_init.h"
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#include "vers_id.h"
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#include "error.h"
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#include "u_mem.h"
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#include "args.h"
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static int curx=-1,cury=-1,curfull=0;
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void ogl_do_fullscreen_internal(void){
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ogl_init_window(curx,cury);
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}
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static Uint16 gammaramp[512];
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static void init_gammaramp(void)
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{
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int i;
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for (i = 0; i < 256; ++i)
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gammaramp[i] = i * 256;
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for (i = 256; i < 512; ++i)
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gammaramp[i] = 0xffff;
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}
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int ogl_setbrightness_internal(void)
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{
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return SDL_SetGammaRamp(gammaramp + ogl_brightness_r * 4,
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gammaramp + ogl_brightness_g * 4,
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gammaramp + ogl_brightness_b * 4
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);
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}
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void ogl_swap_buffers_internal(void){
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SDL_GL_SwapBuffers();
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}
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int ogl_init_window(int x, int y){
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if (gl_initialized){
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if (x==curx && y==cury && curfull==ogl_fullscreen)
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return 0;
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#ifdef __LINUX__
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if (ogl_fullscreen || curfull)
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#endif
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ogl_smash_texture_list_internal();//if we are or were fullscreen, changing vid mode will invalidate current textures
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}
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SDL_WM_SetCaption(DESCENT_VERSION, "Descent");
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if (!SDL_SetVideoMode(x,y, GameArg.DbgGlBpp, SDL_OPENGL | (ogl_fullscreen?SDL_FULLSCREEN:0))) {
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Error("Could not set %dx%dx16 opengl video mode\n",x,y);
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}
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SDL_ShowCursor(0);
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curx=x;cury=y;curfull=ogl_fullscreen;
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gl_initialized=1;
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return 0;
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}
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void ogl_destroy_window(void){
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if (gl_initialized){
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ogl_smash_texture_list_internal();
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SDL_ShowCursor(1);
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//gl_initialized=0;
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//well..SDL doesn't really let you kill the window.. so we just need to wait for sdl_quit
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}
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return;
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}
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void ogl_init(void){
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SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE,16);
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SDL_GL_SetAttribute(SDL_GL_STENCIL_SIZE,0);
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SDL_GL_SetAttribute(SDL_GL_ACCUM_RED_SIZE,0);
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SDL_GL_SetAttribute(SDL_GL_ACCUM_GREEN_SIZE,0);
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SDL_GL_SetAttribute(SDL_GL_ACCUM_BLUE_SIZE,0);
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SDL_GL_SetAttribute(SDL_GL_ACCUM_ALPHA_SIZE,0);
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SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER,1);
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init_gammaramp();
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}
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void ogl_close(void){
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ogl_destroy_window();
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}
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