453 lines
11 KiB
C
453 lines
11 KiB
C
// SDL video functions.
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#include <conf.h>
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#ifdef SDL_VIDEO
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#include <stdlib.h>
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#include <string.h>
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#include <SDL/SDL.h>
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#include "gr.h"
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#include "grdef.h"
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#include "palette.h"
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#include "u_mem.h"
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#include "error.h"
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//added on 9/30/98 by Matt Mueller to set the title bar. Woohoo!
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#include "vers_id.h"
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//end addition -MM
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#include "gamefont.h"
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//added 10/05/98 by Matt Mueller - make fullscreen mode optional
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#include "args.h"
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int sdl_video_flags = SDL_SWSURFACE | SDL_HWPALETTE;
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char checkvidmodeok=0;
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//end addition -MM
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SDL_Surface *screen;
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int gr_installed = 0;
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//added 05/19/99 Matt Mueller - locking stuff
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#ifdef GR_LOCK
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#include "checker.h"
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#ifdef TEST_GR_LOCK
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int gr_testlocklevel=0;
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#endif
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inline void gr_dolock(const char *file,int line) {
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gr_dotestlock();
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if ( gr_testlocklevel==1 && SDL_MUSTLOCK(screen) ) {
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#ifdef __CHECKER__
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chcksetwritable(screen.pixels,screen->w*screen->h*screen->format->BytesPerPixel);
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#endif
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if ( SDL_LockSurface(screen) < 0 )Error("could not lock screen (%s:%i)\n",file,line);
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}
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}
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inline void gr_dounlock(void) {
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gr_dotestunlock();
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if (gr_testlocklevel==0 && SDL_MUSTLOCK(screen) ) {
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SDL_UnlockSurface(screen);
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#ifdef __CHECKER__
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chcksetunwritable(screen.pixels,screen->w*screen->h*screen->format->BytesPerPixel);
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#endif
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}
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}
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#endif
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//end addition -MM
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void gr_palette_clear(); // Function prototype for gr_init;
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void gr_update()
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{
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//added 05/19/99 Matt Mueller - locking stuff
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//
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//gr_testunlock();
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//end addition -MM
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SDL_UpdateRect(screen,0,0,0,0);
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}
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extern int VGA_current_mode; // DPH: kludge - remove at all costs
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int gr_set_mode(u_int32_t mode)
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{
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int w,h;
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#ifdef NOGRAPH
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return 0;
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#endif
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if (mode<=0)
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return 0;
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w=SM_W(mode);
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h=SM_H(mode);
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VGA_current_mode = mode;
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if (screen != NULL) gr_palette_clear();
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//added on 11/06/98 by Matt Mueller to set the title bar. (moved from below)
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//sekmu: might wanna copy this litte blurb to one of the text files or something
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//we want to set it here so that X window manager "Style" type commands work
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//for example, in fvwm2 or fvwm95:
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//Style "D1X*" NoTitle, NoHandles, BorderWidth 0
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//if you can't use -fullscreen like me (crashes X), this is a big help in
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//getting the window centered correctly (if you use SmartPlacement)
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SDL_WM_SetCaption("D2x", "Descent II");
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//end addition -MM
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//edited 10/05/98 by Matt Mueller - make fullscreen mode optional
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// changed by adb on 980913: added SDL_HWPALETTE (should be option?)
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// changed by someone on 980923 to add SDL_FULLSCREEN
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if(!checkvidmodeok || SDL_VideoModeOK(w,h,8,sdl_video_flags)){
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screen = SDL_SetVideoMode(w, h, 8, sdl_video_flags);
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} else {
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screen=NULL;
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}
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// end changes by someone
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// end changes by adb
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//end edit -MM
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if (screen == NULL) {
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Error("Could not set %dx%dx8 video mode\n",w,h);
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exit(1);
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}
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memset( grd_curscreen, 0, sizeof(grs_screen));
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grd_curscreen->sc_mode = mode;
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grd_curscreen->sc_w = w;
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grd_curscreen->sc_h = h;
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grd_curscreen->sc_aspect = fixdiv(grd_curscreen->sc_w*3,grd_curscreen->sc_h*4);
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grd_curscreen->sc_canvas.cv_bitmap.bm_x = 0;
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grd_curscreen->sc_canvas.cv_bitmap.bm_y = 0;
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grd_curscreen->sc_canvas.cv_bitmap.bm_w = w;
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grd_curscreen->sc_canvas.cv_bitmap.bm_h = h;
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grd_curscreen->sc_canvas.cv_bitmap.bm_rowsize = screen->pitch;
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grd_curscreen->sc_canvas.cv_bitmap.bm_type = BM_LINEAR;
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grd_curscreen->sc_canvas.cv_bitmap.bm_data = (unsigned char *)screen->pixels;
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gr_set_current_canvas(NULL);
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//gr_enable_default_palette_loading();
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//added on 9/30/98 by Matt Mueller to hide the mouse if its over the game window
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SDL_ShowCursor(0);
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//end addition -MM
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//--moved up--added on 9/30/98 by Matt Mueller to set the title bar. Woohoo!
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//--moved up-- SDL_WM_SetCaption(DESCENT_VERSION " " D1X_DATE, NULL);
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//--moved up--end addition -MM
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// gamefont_choose_game_font(w,h);
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return 0;
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}
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int gr_check_fullscreen(void){
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return (sdl_video_flags & SDL_FULLSCREEN)?1:0;
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}
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int gr_toggle_fullscreen(void){
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sdl_video_flags^=SDL_FULLSCREEN;
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grd_curscreen->sc_mode=0;//hack to get it to reset screen mode
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return (sdl_video_flags & SDL_FULLSCREEN)?1:0;
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}
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int gr_init(void)
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{
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int retcode;
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int mode = SM(640,480);
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// Only do this function once!
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if (gr_installed==1)
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return -1;
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if (SDL_Init(SDL_INIT_VIDEO) < 0)
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{
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Error("SDL library video initialisation failed: %s.",SDL_GetError());
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}
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MALLOC( grd_curscreen,grs_screen,1 );
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memset( grd_curscreen, 0, sizeof(grs_screen));
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//added 10/05/98 by Matt Mueller - make fullscreen mode optional
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if (args_find("-fullscreen"))
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sdl_video_flags|=SDL_FULLSCREEN;
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//end addition -MM
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//added 05/19/99 Matt Mueller - make HW surface optional
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if (args_find("-hwsurface"))
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sdl_video_flags|=SDL_HWSURFACE;
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//end addition -MM
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if (args_find("-nosdlvidmodecheck"))
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checkvidmodeok=0;
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// Set the mode.
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if ((retcode=gr_set_mode(mode)))
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{
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return retcode;
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}
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grd_curscreen->sc_canvas.cv_color = 0;
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grd_curscreen->sc_canvas.cv_drawmode = 0;
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grd_curscreen->sc_canvas.cv_font = NULL;
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grd_curscreen->sc_canvas.cv_font_fg_color = 0;
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grd_curscreen->sc_canvas.cv_font_bg_color = 0;
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gr_set_current_canvas( &grd_curscreen->sc_canvas );
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gr_installed = 1;
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// added on 980913 by adb to add cleanup
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atexit(gr_close);
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// end changes by adb
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return 0;
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}
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void gr_close()
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{
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if (gr_installed==1)
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{
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gr_installed = 0;
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d_free(grd_curscreen);
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}
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}
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// Palette functions follow.
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static int last_r=0, last_g=0, last_b=0;
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void gr_palette_clear()
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{
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SDL_Palette *palette;
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SDL_Color colors[256];
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int ncolors;
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palette = screen->format->palette;
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if (palette == NULL) {
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return; // Display is not palettised
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}
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ncolors = palette->ncolors;
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memset(colors, 0, ncolors * sizeof(SDL_Color));
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SDL_SetColors(screen, colors, 0, 256);
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gr_palette_faded_out = 1;
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}
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void gr_palette_step_up( int r, int g, int b )
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{
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int i;
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ubyte *p = gr_palette;
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int temp;
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SDL_Palette *palette;
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SDL_Color colors[256];
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if (gr_palette_faded_out) return;
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if ( (r==last_r) && (g==last_g) && (b==last_b) ) return;
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last_r = r;
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last_g = g;
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last_b = b;
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palette = screen->format->palette;
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if (palette == NULL) {
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return; // Display is not palettised
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}
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for (i=0; i<256; i++) {
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temp = (int)(*p++) + r + gr_palette_gamma;
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if (temp<0) temp=0;
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else if (temp>63) temp=63;
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colors[i].r = temp * 4;
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temp = (int)(*p++) + g + gr_palette_gamma;
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if (temp<0) temp=0;
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else if (temp>63) temp=63;
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colors[i].g = temp * 4;
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temp = (int)(*p++) + b + gr_palette_gamma;
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if (temp<0) temp=0;
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else if (temp>63) temp=63;
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colors[i].b = temp * 4;
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}
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SDL_SetColors(screen, colors, 0, 256);
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}
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//added on 980913 by adb to fix palette problems
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// need a min without side effects...
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#undef min
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static inline int min(int x, int y) { return x < y ? x : y; }
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//end changes by adb
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void gr_palette_load( ubyte *pal )
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{
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int i, j;
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SDL_Palette *palette;
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SDL_Color colors[256];
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for (i=0; i<768; i++ ) {
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gr_current_pal[i] = pal[i];
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if (gr_current_pal[i] > 63) gr_current_pal[i] = 63;
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}
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palette = screen->format->palette;
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if (palette == NULL) {
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return; // Display is not palettised
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}
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for (i = 0, j = 0; j < 256; j++) {
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//changed on 980913 by adb to fix palette problems
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colors[j].r = (min(gr_current_pal[i++] + gr_palette_gamma, 63)) * 4;
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colors[j].g = (min(gr_current_pal[i++] + gr_palette_gamma, 63)) * 4;
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colors[j].b = (min(gr_current_pal[i++] + gr_palette_gamma, 63)) * 4;
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//end changes by adb
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}
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SDL_SetColors(screen, colors, 0, 256);
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gr_palette_faded_out = 0;
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init_computed_colors();
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}
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int gr_palette_fade_out(ubyte *pal, int nsteps, int allow_keys)
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{
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int i, j, k;
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ubyte c;
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fix fade_palette[768];
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fix fade_palette_delta[768];
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SDL_Palette *palette;
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SDL_Color fade_colors[256];
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if (gr_palette_faded_out) return 0;
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palette = screen->format->palette;
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if (palette == NULL) {
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return -1; // Display is not palettised
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}
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if (pal==NULL) pal=gr_current_pal;
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for (i=0; i<768; i++ ) {
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gr_current_pal[i] = pal[i];
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fade_palette[i] = i2f(pal[i]);
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fade_palette_delta[i] = fade_palette[i] / nsteps;
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}
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for (j=0; j<nsteps; j++ ) {
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for (i=0, k = 0; k<256; k++ ) {
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fade_palette[i] -= fade_palette_delta[i];
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if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma) )
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fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
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c = f2i(fade_palette[i]);
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if (c > 63) c = 63;
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fade_colors[k].r = c * 4;
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i++;
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fade_palette[i] -= fade_palette_delta[i];
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if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma) )
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fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
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c = f2i(fade_palette[i]);
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if (c > 63) c = 63;
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fade_colors[k].g = c * 4;
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i++;
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fade_palette[i] -= fade_palette_delta[i];
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if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma) )
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fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
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c = f2i(fade_palette[i]);
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if (c > 63) c = 63;
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fade_colors[k].b = c * 4;
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i++;
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}
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SDL_SetColors(screen, fade_colors, 0, 256);
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}
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gr_palette_faded_out = 1;
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return 0;
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}
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int gr_palette_fade_in(ubyte *pal, int nsteps, int allow_keys)
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{
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int i, j, k, ncolors;
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ubyte c;
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fix fade_palette[768];
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fix fade_palette_delta[768];
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SDL_Palette *palette;
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SDL_Color fade_colors[256];
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if (!gr_palette_faded_out) return 0;
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palette = screen->format->palette;
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if (palette == NULL) {
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return -1; // Display is not palettised
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}
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ncolors = palette->ncolors;
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for (i=0; i<768; i++ ) {
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gr_current_pal[i] = pal[i];
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fade_palette[i] = 0;
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fade_palette_delta[i] = i2f(pal[i]) / nsteps;
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}
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for (j=0; j<nsteps; j++ ) {
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for (i=0, k = 0; k<256; k++ ) {
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fade_palette[i] += fade_palette_delta[i];
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if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma) )
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fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
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c = f2i(fade_palette[i]);
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if (c > 63) c = 63;
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fade_colors[k].r = c * 4;
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i++;
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fade_palette[i] += fade_palette_delta[i];
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if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma) )
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fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
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c = f2i(fade_palette[i]);
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if (c > 63) c = 63;
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fade_colors[k].g = c * 4;
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i++;
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fade_palette[i] += fade_palette_delta[i];
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if (fade_palette[i] > i2f(pal[i] + gr_palette_gamma) )
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fade_palette[i] = i2f(pal[i] + gr_palette_gamma);
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c = f2i(fade_palette[i]);
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if (c > 63) c = 63;
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fade_colors[k].b = c * 4;
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i++;
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}
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SDL_SetColors(screen, fade_colors, 0, 256);
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}
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//added on 980913 by adb to fix palette problems
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gr_palette_load(pal);
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//end changes by adb
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gr_palette_faded_out = 0;
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return 0;
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}
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void gr_palette_read(ubyte * pal)
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{
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SDL_Palette *palette;
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int i, j;
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palette = screen->format->palette;
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if (palette == NULL) {
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return; // Display is not palettised
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}
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for (i = 0, j=0; i < 256; i++) {
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pal[j++] = palette->colors[i].r / 4;
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pal[j++] = palette->colors[i].g / 4;
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pal[j++] = palette->colors[i].b / 4;
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}
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}
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#endif // SDL_VIDEO
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