/* vid_common_sw32.c general video driver functions Copyright (C) 1996-1997 Id Software, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to: Free Software Foundation, Inc. 59 Temple Place - Suite 330 Boston, MA 02111-1307, USA */ static const char rcsid[] = "$Id$"; #ifdef HAVE_CONFIG_H # include "config.h" #endif #include "QF/cvar.h" #include "QF/qargs.h" #include "QF/sys.h" #include "QF/va.h" #include "QF/vid.h" #include "compat.h" unsigned short d_8to16table[256]; unsigned int d_8to24table[256]; unsigned char d_15to8table[65536]; /* lhfindcolor LordHavoc: finds nearest matching color in a palette */ int lhfindcolor (byte *pal, int colors, int r, int g, int b) { int i, dist, best, bestdist, rd, gd, bd; best = 0; bestdist = 1000000000; for (i = 0;i < colors;i++) { rd = pal[i*3+0] - r; gd = pal[i*3+1] - g; bd = pal[i*3+2] - b; dist = rd*rd+gd*gd+bd*bd; if (dist < bestdist) { if (!dist) // exact match return i; best = i; bestdist = dist; } } return best; } /* VID_MakeColormap32 LordHavoc: makes a 32bit color*light table, RGBA order, no endian, may need to be re-ordered to hardware at display time */ void VID_MakeColormap32 (void *outcolormap, byte *pal) { int c, l; byte *out; out = (byte *)&d_8to24table; for (c = 0; c < 256; c++) { *out++ = pal[c*3+0]; *out++ = pal[c*3+1]; *out++ = pal[c*3+2]; *out++ = 255; } d_8to24table[255] = 0; // 255 is transparent out = (byte *) outcolormap; for (l = 0;l < VID_GRADES;l++) { for (c = 0;c < vid.fullbright;c++) { out[(l*256+c)*4+0] = bound(0, (pal[c*3+0] * l) >> (VID_CBITS - 1), 255); out[(l*256+c)*4+1] = bound(0, (pal[c*3+1] * l) >> (VID_CBITS - 1), 255); out[(l*256+c)*4+2] = bound(0, (pal[c*3+2] * l) >> (VID_CBITS - 1), 255); out[(l*256+c)*4+3] = 255; } for (;c < 255;c++) { out[(l*256+c)*4+0] = pal[c*3+0]; out[(l*256+c)*4+1] = pal[c*3+1]; out[(l*256+c)*4+2] = pal[c*3+2]; out[(l*256+c)*4+3] = 255; } out[(l*256+255)*4+0] = 0; out[(l*256+255)*4+1] = 0; out[(l*256+255)*4+2] = 0; out[(l*256+255)*4+3] = 0; } } unsigned short lh24to16bit (int red, int green, int blue) { red = bound(0, red, 255); green = bound(0, green, 255); blue = bound(0, blue, 255); red >>= 3; green >>= 2; blue >>= 3; red <<= 11; green <<= 5; return (unsigned short) (red | green | blue); } /* VID_MakeColormap16 LordHavoc: makes a 16bit color*light table, RGB order, native endian, may need to be translated to hardware order at display time */ void VID_MakeColormap16 (void *outcolormap, byte *pal) { int c, l; unsigned short *out; out = (unsigned short *)&d_8to16table; for (c = 0; c < 256; c++) *out++ = lh24to16bit(pal[c*3+0], pal[c*3+1], pal[c*3+2]); d_8to16table[255] = 0; // 255 is transparent out = (unsigned short *) outcolormap; for (l = 0;l < VID_GRADES;l++) { for (c = 0;c < vid.fullbright;c++) out[l*256+c] = lh24to16bit( (pal[c*3+0] * l) >> (VID_CBITS - 1), (pal[c*3+1] * l) >> (VID_CBITS - 1), (pal[c*3+2] * l) >> (VID_CBITS - 1)); for (;c < 255;c++) out[l*256+c] = lh24to16bit(pal[c*3+0], pal[c*3+1], pal[c*3+2]); out[l*256+255] = 0; } } /* VID_MakeColormap8 LordHavoc: makes a 8bit color*light table */ void VID_MakeColormap8 (void *outcolormap, byte *pal) { int c, l; byte *out; out = (byte *) outcolormap; for (l = 0;l < VID_GRADES;l++) { for (c = 0;c < vid.fullbright;c++) out[l*256+c] = lhfindcolor(pal, 256, (pal[c*3+0] * l) >> (VID_CBITS - 1), (pal[c*3+1] * l) >> (VID_CBITS - 1), (pal[c*3+2] * l) >> (VID_CBITS - 1)); for (;c < 256;c++) out[l*256+c] = c; } } /* VID_MakeColormaps LordHavoc: makes 8bit, 16bit, and 32bit colormaps and palettes */ void VID_MakeColormaps (int fullbrights, byte *pal) { vid.fullbright = fullbrights; vid.colormap8 = malloc (256*VID_GRADES * sizeof (byte)); vid.colormap16 = malloc (256*VID_GRADES * sizeof (short)); vid.colormap32 = malloc (256*VID_GRADES * sizeof (int)); SYS_CHECKMEM (vid.colormap8 && vid.colormap16 && vid.colormap32); VID_MakeColormap8(vid.colormap8, pal); VID_MakeColormap16(vid.colormap16, pal); VID_MakeColormap32(vid.colormap32, pal); } void VID_InitBuffers (void) { int buffersize, zbuffersize, cachesize = 1; // Calculate the sizes we want first buffersize = vid.rowbytes * vid.height; zbuffersize = vid.width * vid.height * sizeof (*vid.zbuffer); if (vid.surf_cache_size) cachesize = vid.surf_cache_size (vid.width, vid.height); // Free the old z-buffer if (vid.zbuffer) { free (vid.zbuffer); vid.zbuffer = NULL; } // Free the old surface cache if (vid.surfcache) { if (vid.flush_caches) vid.flush_caches (); free (vid.surfcache); vid.surfcache = NULL; } if (vid.do_screen_buffer) { vid.do_screen_buffer (); } else { // Free the old screen buffer if (vid.buffer) { free (vid.buffer); vid.conbuffer = vid.buffer = NULL; } // Allocate the new screen buffer vid.conbuffer = vid.buffer = calloc (buffersize, 1); if (!vid.conbuffer) { Sys_Error ("Not enough memory for video mode"); } } // Allocate the new z-buffer vid.zbuffer = calloc (zbuffersize, 1); if (!vid.zbuffer) { free (vid.buffer); vid.conbuffer = vid.buffer = NULL; Sys_Error ("Not enough memory for video mode"); } // Allocate the new surface cache; free the z-buffer if we fail vid.surfcache = calloc (cachesize, 1); if (!vid.surfcache) { free (vid.buffer); free (vid.zbuffer); vid.zbuffer = NULL; Sys_Error ("Not enough memory for video mode"); } if (vid.init_caches) vid.init_caches (vid.surfcache, cachesize); } void VID_ShiftPalette (unsigned char *p) { VID_SetPalette (p); }