mirror of
https://git.code.sf.net/p/quake/quakeforge
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111 lines
2.8 KiB
C
111 lines
2.8 KiB
C
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/*
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mod_flood.c
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Flood fill a skin texture.
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to:
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Free Software Foundation, Inc.
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59 Temple Place - Suite 330
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Boston, MA 02111-1307, USA
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*/
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// models are the only shared resource between a client and server running
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// on the same machine.
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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static __attribute__ ((used)) const char rcsid[] = "$Id$";
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#include "QF/model.h"
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#include "QF/sys.h"
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#include "QF/vid.h"
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// a pose is a single set of vertexes. a frame may be
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// an animating sequence of poses
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typedef struct {
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short x, y;
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} floodfill_t;
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// must be a power of 2
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#define FLOODFILL_FIFO_SIZE 0x1000
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#define FLOODFILL_FIFO_MASK (FLOODFILL_FIFO_SIZE - 1)
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#define FLOODFILL_STEP( off, dx, dy ) \
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{ \
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if (pos[off] == fillcolor) { \
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pos[off] = 255; \
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fifo[inpt].x = x + (dx), fifo[inpt].y = y + (dy); \
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inpt = (inpt + 1) & FLOODFILL_FIFO_MASK; \
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} else if (pos[off] != 255) \
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fdc = pos[off]; \
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}
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/*
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Mod_FloodFillSkin
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Fill background pixels so mipmapping doesn't have halos - Ed
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*/
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VISIBLE void
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Mod_FloodFillSkin (byte * skin, int skinwidth, int skinheight)
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{
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byte fillcolor = *skin; // assume this is the pixel to fill
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floodfill_t fifo[FLOODFILL_FIFO_SIZE];
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int filledcolor = -1, inpt = 0, outpt = 0;
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int i;
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if (filledcolor == -1) {
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filledcolor = 0;
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// attempt to find opaque black
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for (i = 0; i < 256; ++i)
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if (d_8to24table[i] == (255 << 0)) // alpha 1.0
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{
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filledcolor = i;
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break;
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}
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}
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// can't fill to filled color or transparent color (used as visited marker)
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if ((fillcolor == filledcolor) || (fillcolor == 255)) {
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Sys_MaskPrintf (SYS_GLT, "not filling skin from %d to %d\n",
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fillcolor, filledcolor);
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return;
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}
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fifo[inpt].x = 0, fifo[inpt].y = 0;
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inpt = (inpt + 1) & FLOODFILL_FIFO_MASK;
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while (outpt != inpt) {
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int x = fifo[outpt].x, y = fifo[outpt].y, fdc = filledcolor;
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byte *pos = &skin[x + skinwidth * y];
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outpt = (outpt + 1) & FLOODFILL_FIFO_MASK;
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if (x > 0)
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FLOODFILL_STEP (-1, -1, 0);
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if (x < skinwidth - 1)
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FLOODFILL_STEP (1, 1, 0);
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if (y > 0)
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FLOODFILL_STEP (-skinwidth, 0, -1);
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if (y < skinheight - 1)
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FLOODFILL_STEP (skinwidth, 0, 1);
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skin[x + skinwidth * y] = fdc;
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}
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}
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