src/soft/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 "error.h"
  26 #include "view.h"
  27 #include "memory.h"
  28 #include "misc.h"
  29 #include "files.h"
  30 #include "system.h"
  31
  32 #include <string.h>
  33 #include <assert.h>
  34
  35 int SCRW = 800;
  36 int SCRH = 600;
  37 char fullscreen = OFF;
  38
  39 byte bright[256];
  40 byte mixmap[256][256];
  41 byte clrmap[256*12];
  42
  43 byte *buffer;
  44 int buf_w, buf_h, pitch;
  45 static int offx, offy;
  46 static int cx1, cx2, cy1, cy2;
  47 static byte flametab[16] = {
  48   0xBC,0xBA,0xB8,0xB6,0xB4,0xB2,0xB0,0xD5,0xD6,0xD7,0xA1,0xA0,0xE3,0xE2,0xE1,0xE0
  49 };
  50
  51 vgaimg *V_getvgaimg (int id) {
  52   int loaded = M_was_locked(id);
  53   vgaimg *v = M_lock(id);
  54   if (v != NULL && !loaded) {
  55     v->w = short2host(v->w);
  56     v->h = short2host(v->h);
  57     v->sx = short2host(v->sx);
  58     v->sy = short2host(v->sy);
  59   }
  60   return v;
  61 }
  62
  63 vgaimg *V_loadvgaimg (char *name) {
  64   return V_getvgaimg(F_getresid(name));
  65 }
  66
  67 static void draw_rect (int x, int y, int w, int h, int c) {
  68   int i;
  69   int x0 = max(x, cx1);
  70   int y0 = max(y, cy1);
  71   int x1 = min(x + w - 1, cx2);
  72   int y1 = min(y + h - 1, cy2);
  73   int len = x1 - x0;
  74   for (i = y0; i <= y1; i++) {
  75     memset(&buffer[i * pitch + x0], c, len);
  76   }
  77 }
  78
  79 void V_setrect (short x, short w, short y, short h) {
  80   cx1 = max(x, 0);
  81   cx2 = min(x + w - 1, buf_w - 1);
  82   cy1 = max(y, 0);
  83   cy2 = min(y + h - 1, buf_h - 1);
  84 }
  85
  86 static void putpixel (int x, int y, byte color) {
  87   if (x >= cx1 && x <= cx2 && y >= cy1 && y <= cy2) {
  88     buffer[y * pitch + x] = color;
  89   }
  90 }
  91
  92 static byte getpixel (int x, int y) {
  93   return x >= cx1 && x <= cx2 && y >= cy1 && y <= cy2 ? buffer[y * pitch + x] : 0;
  94 }
  95
  96 static void mappixel (int x, int y, byte *cmap) {
  97   byte c = getpixel(x, y);
  98   putpixel(x, y, cmap[c]);
  99 }
 100
 101 void V_center (int f) {
 102   if (f) {
 103     V_offset(buf_w / 2 - 320 / 2, buf_h / 2 - 200 / 2);
 104   } else {
 105     V_offset(0, 0);
 106   }
 107 }
 108
 109 void V_offset (int ox, int oy) {
 110   offx = ox;
 111   offy = oy;
 112 }
 113
 114 static void draw_spr (short x, short y, vgaimg *i, int d, int c) {
 115     if (i==NULL) return;
 116     x += offx;
 117     y += offy;
 118     if (d & 1) x=x-i->w+i->sx; else x-=i->sx;
 119     if (d & 2) y=y-i->h+i->sy; else y-=i->sy;
 120     if(x+i->w>=cx1 && x<=cx2 && y+i->h>=cy1 && y<=cy2) {
 121         int lx, ly;
 122         byte *p = (byte*)i + sizeof(vgaimg);
 123         for (ly=0; ly<i->h; ly++) {
 124             for(lx=0; lx<i->w; lx++) {
 125                 int rx,ry;
 126                 rx = (d & 1) ? (i->w-lx-1) : (lx);
 127                 ry = (d & 2) ? (i->h-ly-1) : (ly);
 128                 if (*p) {
 129                     byte t = *p;
 130                     if (c) if (t>=0x70 && t<=0x7F) t=t-0x70+c;
 131                     putpixel(x+rx,y+ry,t);
 132                 }
 133                 p++;
 134             }
 135         }
 136     }
 137 }
 138
 139 void V_rotspr (int x, int y, vgaimg* i, int d) {
 140     x+=i->w*((d&1)?1:0);
 141     y+=i->h*((d&2)?1:0);
 142     draw_spr(x,y,i,d,0);
 143 }
 144
 145 void V_pic (short x, short y, vgaimg *i) {
 146     draw_spr(x, y, i, 0, 0);
 147 }
 148
 149 void V_manspr (int x, int y, void *p, unsigned char c) {
 150     draw_spr(x, y, p, 0, c);
 151 }
 152
 153 void V_manspr2(int x,int y,void *p, unsigned char c) {
 154     draw_spr(x, y, p, 1, c);
 155 }
 156
 157 void V_dot (short x, short y, unsigned char c) {
 158     putpixel(x, y, c);
 159 }
 160
 161 void smoke_sprf (int x, int y, byte c) {
 162     byte t = getpixel(x,y);
 163     c = c + bright[t];
 164     c += 0x60;
 165     c ^= 0xF;
 166     putpixel(x,y,mixmap[c][t]);
 167 }
 168
 169 void flame_sprf (int x, int y, byte c) {
 170     byte t = getpixel(x,y);
 171     c = c + bright[t];
 172     putpixel(x,y,flametab[c]);
 173 }
 174
 175 void V_sprf (short x,short y,vgaimg *i,spr_f *f) {
 176     if (i==NULL) return;
 177     x-=i->sx;
 178     y-=i->sy;
 179     int cx, cy;
 180     byte *p = (byte*)i;
 181     p+=sizeof(vgaimg);
 182     for (cy=y; cy<y+i->h; cy++) {
 183         for(cx=x; cx<x+i->w; cx++) {
 184             if (*p) {
 185                 (*f)(cx, cy, *p);
 186             }
 187             p++;
 188         }
 189     }
 190 }
 191
 192 void V_spr (short x, short y, vgaimg *i) {
 193     draw_spr(x, y, i, 0, 0);
 194 }
 195
 196 void V_spr2 (short x, short y, vgaimg *i) {
 197     draw_spr(x,y,i,1,0);
 198 }
 199
 200 void V_clr (short x, short w, short y, short h, unsigned char c) {
 201     draw_rect(x, y, w, h, c);
 202 }
 203
 204 void V_setscr (void *p) {
 205   Y_repaint();
 206 }
 207
 208 void V_copytoscr (short x, short w, short y, short h) {
 209   Y_repaint_rect(x, y, w, h);
 210 }
 211
 212 void V_maptoscr (int x, int w, int y, int h, void *cmap) {
 213     int cx,cy;
 214     for (cx=x; cx<x+w; cx++)
 215         for (cy=y; cy<y+h; cy++)
 216             mappixel(cx,cy,(byte*)cmap);
 217     V_copytoscr(x,w,y,h);
 218 }
 219
 220 void V_remap_rect (int x, int y, int w, int h, byte *cmap) {
 221     int cx,cy;
 222     for (cx=x; cx<x+w; cx++)
 223         for (cy=y; cy<y+h; cy++)
 224             mappixel(cx,cy,cmap);
 225 }