src/vga.c

   1 /*
   2    Copyright (C) Prikol Software 1996-1997
   3    Copyright (C) Aleksey Volynskov 1996-1997
   4    Copyright (C) <ARembo@gmail.com> 2011
   5
   6    This file is part of the Doom2D:Rembo project.
   7
   8    Doom2D:Rembo is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License version 2 as
  10    published by the Free Software Foundation.
  11
  12    Doom2D:Rembo is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program; if not, see <http://www.gnu.org/licenses/> or
  19    write to the Free Software Foundation, Inc.,
  20    51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  21 */
  22
  23 #include "glob.h"
  24 #include "vga.h"
  25 #include <SDL.h>
  26 #include "error.h"
  27 #include "view.h"
  28 #include "memory.h"
  29 #include "misc.h"
  30 #include "files.h"
  31
  32 #include <assert.h>
  33
  34
  35 // адрес экранного буфера
  36 unsigned char *scra;
  37
  38 // виртуальный экран
  39 unsigned char scrbuf[64000];
  40
  41
  42 int SCRW = 800;
  43 int SCRH = 600;
  44
  45 SDL_Surface* screen = NULL;
  46
  47 int cx1,cx2,cy1,cy2;
  48
  49 char fullscreen = OFF;
  50
  51 byte bright[256];
  52 byte mixmap[256][256];
  53 byte clrmap[256*12];
  54
  55 static byte flametab[16] = {
  56   0xBC,0xBA,0xB8,0xB6,0xB4,0xB2,0xB0,0xD5,0xD6,0xD7,0xA1,0xA0,0xE3,0xE2,0xE1,0xE0
  57 };
  58
  59 extern void *walp[256];
  60
  61 #define HQ 2
  62
  63 vgaimg *V_getvgaimg (int id) {
  64   int loaded = M_was_locked(id);
  65   vgaimg *v = M_lock(id);
  66   if (v != NULL && !loaded) {
  67     v->w = short2host(v->w);
  68     v->h = short2host(v->h);
  69     v->sx = short2host(v->sx);
  70     v->sy = short2host(v->sy);
  71   }
  72   return v;
  73 }
  74
  75 vgaimg *V_loadvgaimg (char *name) {
  76   return V_getvgaimg(F_getresid(name));
  77 }
  78
  79 short V_init(void)
  80 {
  81     Uint32 flags = SDL_SWSURFACE|SDL_DOUBLEBUF|SDL_HWPALETTE;
  82     if (fullscreen) flags = flags | SDL_FULLSCREEN;
  83     screen = SDL_SetVideoMode(SCRW, SCRH, 8, flags);
  84     if (!screen) ERR_failinit("Unable to set video mode: %s\n", SDL_GetError());
  85     SCRW /= HQ;
  86     SCRH /= HQ;
  87     return 0;
  88 }
  89
  90 // переключение в текстовый режим
  91 void V_done(void)
  92 {
  93     SDL_Quit();
  94 }
  95
  96 void draw_rect (int x, int y, int w, int h, int c)
  97 {
  98     SDL_Rect dstrect;
  99     dstrect.x = x*HQ;
 100     dstrect.y = y*HQ;
 101     dstrect.w = w*HQ;
 102     dstrect.h = h*HQ;
 103     SDL_FillRect(screen, &dstrect, c);
 104 }
 105
 106 // установить область вывода
 107 void V_setrect(short x,short w,short y,short h)
 108 {
 109     SDL_Rect r;
 110     r.x=x*HQ;
 111     r.y=y*HQ;
 112     r.w=w*HQ;
 113     r.h=h*HQ;
 114     SDL_SetClipRect(screen, &r);
 115     SDL_GetClipRect(screen, &r);
 116     cx1 = x;
 117     cx2 = x+w-1;
 118     cy1 = y;
 119     cy2 = y+h-1;
 120     if (cx1<0) cx1=0;
 121     if (cx2>=SCRW) cx2=SCRW-1;
 122     if (cy1<0) cy1=0;
 123     if (cy2>=SCRH) cy2=SCRH-1;
 124 }
 125
 126 void putpixel(int x, int y, Uint8 color)
 127 {
 128     if(x>=cx1 && x<=cx2 && y>=cy1 && y<=cy2) {
 129         x*=HQ;
 130         y*=HQ;
 131         Uint8 *p = (Uint8 *)screen->pixels + y*screen->pitch + x;
 132         *p = color;
 133         *(p+1) = color;
 134         p += screen->pitch;
 135         *p = color;
 136         *(p+1) = color;
 137     }
 138 }
 139
 140 byte getpixel(int x, int y)
 141 {
 142     if(x>=cx1 && x<=cx2 && y>=cy1 && y<=cy2) {
 143         x*=HQ;
 144         y*=HQ;
 145         return *((Uint8 *)screen->pixels + y*screen->pitch + x);
 146     }
 147     return 0;
 148 }
 149
 150 void mappixel(int x,int y,byte* cmap)
 151 {
 152     byte c = getpixel(x,y);
 153     putpixel(x,y,cmap[c]);
 154 }
 155
 156 int offx = 0;
 157 int offy = 0;
 158
 159 void V_center(int f)
 160 {
 161     if (f) V_offset(SCRW/2-320/2, SCRH/2-200/2);
 162     else V_offset(0, 0);
 163 }
 164
 165 void V_offset(int ox, int oy)
 166 {
 167     offx=ox;
 168     offy=oy;
 169 }
 170
 171 void draw_spr(short x,short y,vgaimg *i, int d, int c)
 172 {
 173     if (i==NULL) return;
 174     x += offx;
 175     y += offy;
 176     if (d & 1) x=x-i->w+i->sx; else x-=i->sx;
 177     if (d & 2) y=y-i->h+i->sy; else y-=i->sy;
 178     if(x+i->w>=cx1 && x<=cx2 && y+i->h>=cy1 && y<=cy2) {
 179         int lx, ly;
 180         byte *p = (byte*)i + sizeof(vgaimg);
 181         for (ly=0; ly<i->h; ly++) {
 182             for(lx=0; lx<i->w; lx++) {
 183                 int rx,ry;
 184                 rx = (d & 1) ? (i->w-lx-1) : (rx=lx);
 185                 ry = (d & 2) ? (i->h-ly-1) : (ry=ly);
 186                 if (*p) {
 187                     byte t = *p;
 188                     if (c) if (t>=0x70 && t<=0x7F) t=t-0x70+c;
 189                     putpixel(x+rx,y+ry,t);
 190                 }
 191                 p++;
 192             }
 193         }
 194     }
 195 }
 196
 197 void V_rotspr (int x, int y, vgaimg* i, int d)
 198 {
 199     x+=i->w*((d&1)?1:0);
 200     y+=i->h*((d&2)?1:0);
 201     draw_spr(x,y,i,d,0);
 202 }
 203
 204 void V_pic(short x,short y,vgaimg *i)
 205 {
 206     draw_spr(x,y,i, 0, 0);
 207 }
 208
 209 void V_manspr(int x,int y,void *p, unsigned char c)
 210 {
 211     draw_spr(x,y,p, 0, c);
 212 }
 213
 214 void V_manspr2(int x,int y,void *p, unsigned char c)
 215 {
 216     draw_spr(x,y,p, 1, c);
 217 }
 218
 219 // вывести точку цвета c в координатах (x,y)
 220 void V_dot(short x,short y, unsigned char c)
 221 {
 222     putpixel(x,y,c);
 223 }
 224
 225 void smoke_sprf(int x, int y, byte c)
 226 {
 227     byte t = getpixel(x,y);
 228     c = c + bright[t];
 229     c += 0x60;
 230     c ^= 0xF;
 231     putpixel(x,y,mixmap[c][t]);
 232 }
 233
 234 void flame_sprf(int x, int y, byte c)
 235 {
 236     byte t = getpixel(x,y);
 237     c = c + bright[t];
 238     putpixel(x,y,flametab[c]);
 239 }
 240
 241 void V_sprf(short x,short y,vgaimg *i,spr_f *f)
 242 {
 243     if (i==NULL) return;
 244     x-=i->sx;
 245     y-=i->sy;
 246     int cx, cy;
 247     byte *p = (byte*)i;
 248     p+=sizeof(vgaimg);
 249     for (cy=y; cy<y+i->h; cy++) {
 250         for(cx=x; cx<x+i->w; cx++) {
 251             if (*p) {
 252                 (*f)(cx, cy, *p);
 253             }
 254             p++;
 255         }
 256     }
 257 }
 258
 259 void V_spr(short x,short y,vgaimg *i)
 260 {
 261     draw_spr(x,y,i,0, 0);
 262 }
 263
 264 void V_spr2(short x,short y,vgaimg *i)
 265 {
 266     draw_spr(x,y,i,1,0);
 267 }
 268
 269 void V_clr(short x,short w,short y,short h,unsigned char c)
 270 {
 271     draw_rect(x,y,w,h, c);
 272 }
 273
 274 // установить палитру из массива p
 275 void VP_setall(void *p)
 276 {
 277     VP_set(p, 0, 256);
 278 }
 279
 280 // установить n цветов, начиная с f, из массива p
 281 void VP_set(void *p,short f,short n)
 282 {
 283     byte *ptr = (byte*)p;
 284     SDL_Color colors[256];
 285     int i;
 286     for(i=f;i<f+n;i++)
 287     {
 288       colors[i].r=ptr[0]*4;
 289       colors[i].g=ptr[1]*4;
 290       colors[i].b=ptr[2]*4;
 291       ptr+=3;
 292     }
 293     SDL_SetPalette(screen, SDL_LOGPAL|SDL_PHYSPAL, colors, f, n);
 294 }
 295
 296 // установить адрес экранного буфера
 297 // NULL - реальный экран
 298 void V_setscr(void *p)
 299 {
 300     if (screen) SDL_Flip(screen);
 301 }
 302
 303 // скопировать прямоугольник на экран
 304 void V_copytoscr(short x,short w,short y,short h)
 305 {
 306     x*=HQ; y*=HQ; w*=HQ; h*=HQ;
 307     SDL_UpdateRect(screen, x, y, w, h);
 308 }
 309
 310 void V_maptoscr(int x,int w,int y,int h,void *cmap)
 311 {
 312     int cx,cy;
 313     for (cx=x; cx<x+w; cx++)
 314         for (cy=y; cy<y+h; cy++)
 315             mappixel(cx,cy,(byte*)cmap);
 316     V_copytoscr(x,w,y,h);
 317 }
 318
 319 void V_remap_rect(int x,int y,int w,int h,byte *cmap)
 320 {
 321     int cx,cy;
 322     for (cx=x; cx<x+w; cx++)
 323         for (cy=y; cy<y+h; cy++)
 324             mappixel(cx,cy,cmap);
 325 }
 326
 327 void V_toggle()
 328 {
 329     if (!SDL_WM_ToggleFullScreen(screen)) {
 330         int ncolors = screen->format->palette->ncolors;
 331         SDL_Color colors[256];
 332         int i;
 333         for (i=0; i<ncolors; i++) {
 334             colors[i].r = screen->format->palette->colors[i].r;
 335             colors[i].g = screen->format->palette->colors[i].g;
 336             colors[i].b = screen->format->palette->colors[i].b;
 337         }
 338
 339         Uint32 flags = screen->flags;
 340
 341         SDL_FreeSurface(screen);
 342
 343         screen = SDL_SetVideoMode(0, 0, 0, flags ^ SDL_FULLSCREEN);
 344         if(screen == NULL) {
 345             ERR_fatal("Unable to set video mode\n");
 346             exit(1);
 347         }
 348
 349         SDL_SetPalette(screen, SDL_LOGPAL|SDL_PHYSPAL, colors, 0, ncolors);
 350     }
 351 }