mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-26 14:20:59 +00:00
ca63c0360a
I realized that after making the hunk 64-bit clean, I had forgotten to go through and convert all the saved marks to size_t.
698 lines
17 KiB
C
698 lines
17 KiB
C
/*
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tga.c
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targa image handling
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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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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STRINGS_H
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# include <strings.h>
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#endif
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#include <stdlib.h>
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#include "QF/image.h"
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#include "QF/qendian.h"
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#include "QF/quakefs.h"
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#include "QF/sys.h"
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#include "QF/tga.h"
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#include "QF/zone.h"
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#include "QF/GL/defines.h"
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#include "compat.h"
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typedef struct {
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byte red;
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byte green;
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byte blue;
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byte alpha;
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} cmap_t;
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static inline byte *
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blit_rgb (byte *buf, int count, byte red, byte green, byte blue)
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{
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while (count--) {
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*buf++ = red;
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*buf++ = green;
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*buf++ = blue;
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*buf++ = 255;
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}
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return buf;
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}
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static inline byte *
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blit_rgba (byte *buf, int count, byte red, byte green, byte blue, byte alpha)
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{
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while (count--) {
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*buf++ = red;
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*buf++ = green;
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*buf++ = blue;
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*buf++ = alpha;
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}
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return buf;
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}
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static inline byte *
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reverse_blit_rgb (byte *buf, int count, byte red, byte green, byte blue)
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{
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while (count--) {
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*buf-- = 255;
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*buf-- = blue;
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*buf-- = green;
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*buf-- = red;
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}
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return buf;
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}
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static inline byte *
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reverse_blit_rgba (byte *buf, int count, byte red, byte green, byte blue,
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byte alpha)
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{
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while (count--) {
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*buf-- = alpha;
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*buf-- = blue;
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*buf-- = green;
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*buf-- = red;
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}
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return buf;
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}
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static inline byte *
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blit_l (byte *buf, int count, byte lum)
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{
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while (count--) {
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*buf++ = lum;
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}
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return buf;
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}
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static inline byte *
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reverse_blit_l (byte *buf, int count, byte lum)
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{
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while (count--) {
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*buf-- = lum;
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}
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return buf;
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}
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static inline byte *
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read_bgr (byte *buf, int count, byte **data, cmap_t *cmap)
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{
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byte blue = *(*data)++;
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byte green = *(*data)++;
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byte red = *(*data)++;
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return blit_rgb (buf, count, red, green, blue);
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}
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static inline byte *
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read_bgra (byte *buf, int count, byte **data, cmap_t *cmap)
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{
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byte blue = *(*data)++;
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byte green = *(*data)++;
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byte red = *(*data)++;
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byte alpha = *(*data)++;
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return blit_rgba (buf, count, red, green, blue, alpha);
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}
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static inline byte *
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reverse_read_bgr (byte *buf, int count, byte **data, cmap_t *cmap)
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{
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byte blue = *(*data)++;
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byte green = *(*data)++;
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byte red = *(*data)++;
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return reverse_blit_rgb (buf, count, red, green, blue);
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}
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static inline byte *
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reverse_read_bgra (byte *buf, int count, byte **data, cmap_t *cmap)
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{
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byte blue = *(*data)++;
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byte green = *(*data)++;
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byte red = *(*data)++;
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byte alpha = *(*data)++;
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return reverse_blit_rgba (buf, count, red, green, blue, alpha);
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}
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static inline byte *
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read_cmap (byte *buf, int count, byte **data, cmap_t *cmap)
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{
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byte ind = *(*data)++;
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byte red = cmap[ind].red;
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byte green = cmap[ind].green;
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byte blue = cmap[ind].blue;
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byte alpha = cmap[ind].alpha;
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return blit_rgba (buf, count, red, green, blue, alpha);
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}
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static inline byte *
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reverse_read_cmap (byte *buf, int count, byte **data, cmap_t *cmap)
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{
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byte ind = *(*data)++;
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byte red = cmap[ind].red;
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byte green = cmap[ind].green;
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byte blue = cmap[ind].blue;
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byte alpha = cmap[ind].alpha;
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return reverse_blit_rgba (buf, count, red, green, blue, alpha);
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}
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static inline byte *
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read_l (byte *buf, int count, byte **data, cmap_t *cmap)
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{
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byte lum = *(*data)++;
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return blit_l (buf, count, lum);
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}
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static inline byte *
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reverse_read_l (byte *buf, int count, byte **data, cmap_t *cmap)
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{
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byte lum = *(*data)++;
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return reverse_blit_l (buf, count, lum);
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}
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static inline void
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setup_pixrow_span (TargaHeader *targa, tex_t *tex, byte **_pixrow, int *_span,
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int pixbytes)
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{
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byte *pixrow;
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int span;
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span = targa->width * pixbytes;
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pixrow = tex->data;
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if (targa->attributes & 0x10) {
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// right to left
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pixrow += span - pixbytes;
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}
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if (!(targa->attributes & 0x20)) {
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// bottom to top
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pixrow += (targa->height - 1) * span;
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span = -span;
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}
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*_pixrow = pixrow;
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*_span = span;
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}
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static byte *
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skip_colormap (TargaHeader *targa, byte *data)
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{
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int bpe;
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if (!targa->colormap_type)
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return data;
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Sys_MaskPrintf (SYS_dev, "LoadTGA: skipping colormap\n");
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bpe = (targa->pixel_size +7) / 8;
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return data + bpe * targa->colormap_length;
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}
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static cmap_t *
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parse_colormap (TargaHeader *targa, byte **dataByte)
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{
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byte *data;
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cmap_t *cm, *cmap;
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int i;
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unsigned short word;
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if (!targa->colormap_type)
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Sys_Error ("LoadTGA: colormap missing");
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if (targa->colormap_type != 1)
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Sys_Error ("LoadTGA: unkown colormap type");
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if (targa->colormap_index + targa->colormap_length > 256)
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Sys_Error ("LoadTGA: unsupported color map size");
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if (targa->pixel_size != 8)
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Sys_Error ("LoadTGA: unsupported color map index bits");
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switch (targa->colormap_size) {
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case 32:
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if (!targa->colormap_index && targa->colormap_length == 256) {
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cmap = (cmap_t *) *dataByte;
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*dataByte += 256 * sizeof (cmap_t);
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return cmap;
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}
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case 24:
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case 16:
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case 15:
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cmap = Hunk_AllocName (0, 256 * sizeof (cmap_t), "TGA cmap");
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break;
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default:
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Sys_Error ("LoadTGA: unsupported color map size");
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break;
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}
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data = *dataByte;
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cm = cmap + targa->colormap_index;
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switch (targa->colormap_size) {
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case 15:
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for (i = 0; i < targa->colormap_length; i++, cm++) {
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word = *data++;
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word |= (*data++) << 8;
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cm->red = (word << 3) & 0xf8;
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cm->green = (word >> 2) & 0xf8;
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cm->blue = (word >> 7) & 0xf8;
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cm->alpha = 255;
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}
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break;
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case 16:
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for (i = 0; i < targa->colormap_length; i++, cm++) {
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word = *data++;
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word |= (*data++) << 8;
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cm->red = (word << 3) & 0xf8;
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cm->green = (word >> 2) & 0xf8;
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cm->blue = (word >> 7) & 0xf8;
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cm->alpha = (word & 0x8000) ? 255 : 0;
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}
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break;
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case 24:
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for (i = 0; i < targa->colormap_length; i++, cm++) {
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cm->red = *data++;
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cm->green = *data++;
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cm->blue = *data++;
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cm->alpha = 255;
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}
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break;
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case 32:
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for (i = 0; i < targa->colormap_length; i++, cm++) {
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cm->red = *data++;
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cm->green = *data++;
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cm->blue = *data++;
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cm->alpha = *data++;
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}
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break;
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}
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return cmap;
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}
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static void
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decode_colormap (TargaHeader *targa, tex_t *tex, byte *dataByte)
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{
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byte *pixcol, *pixrow;
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cmap_t *cmap;
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int column, columns, rows, span;
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cmap = parse_colormap (targa, &dataByte);
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tex->format = tex_rgba;
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columns = targa->width;
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rows = targa->height;
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setup_pixrow_span (targa, tex, &pixrow, &span, 4);
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if (targa->attributes & 0x10) {
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// right to left
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while (rows-- > 0) {
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pixcol = pixrow;
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for (column = columns; column > 0; column--)
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pixcol = reverse_read_cmap (pixcol, 1, &dataByte, cmap);
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pixrow += span;
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}
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} else {
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// left to right
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while (rows-- > 0) {
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pixcol = pixrow;
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for (column = columns; column > 0; column--)
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pixcol = read_cmap (pixcol, 1, &dataByte, cmap);
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pixrow += span;
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}
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}
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}
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static void
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decode_truecolor_24 (TargaHeader *targa, tex_t *tex, byte *dataByte)
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{
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byte *pixcol, *pixrow;
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int column, columns, rows, span;
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columns = targa->width;
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rows = targa->height;
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setup_pixrow_span (targa, tex, &pixrow, &span, 4);
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if (targa->attributes & 0x10) {
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// right to left
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while (rows-- > 0) {
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pixcol = pixrow;
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for (column = columns; column > 0; column--)
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pixcol = reverse_read_bgr (pixcol, 1, &dataByte, 0);
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pixrow += span;
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}
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} else {
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// left to right
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while (rows-- > 0) {
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pixcol = pixrow;
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for (column = columns; column > 0; column--)
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pixcol = read_bgr (pixcol, 1, &dataByte, 0);
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pixrow += span;
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}
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}
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}
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static void
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decode_truecolor_32 (TargaHeader *targa, tex_t *tex, byte *dataByte)
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{
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byte *pixcol, *pixrow;
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int column, columns, rows, span;
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columns = targa->width;
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rows = targa->height;
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setup_pixrow_span (targa, tex, &pixrow, &span, 4);
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if (targa->attributes & 0x10) {
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// right to left
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while (rows-- > 0) {
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pixcol = pixrow;
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for (column = columns; column > 0; column--)
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pixcol = reverse_read_bgra (pixcol, 1, &dataByte, 0);
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pixrow += span;
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}
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} else {
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// left to right
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while (rows-- > 0) {
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pixcol = pixrow;
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for (column = columns; column > 0; column--)
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pixcol = read_bgra (pixcol, 1, &dataByte, 0);
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pixrow += span;
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}
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}
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}
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#define rle_expand(expand) \
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do { \
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unsigned char packetHeader, packetSize; \
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while (rows-- > 0) { \
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pixcol = pixrow; \
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pixrow += span; \
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for (column = columns; column > 0; ) { \
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packetHeader = *dataByte++; \
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packetSize = 1 + (packetHeader & 0x7f); \
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while (packetSize > column) { \
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int count = column; \
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\
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packetSize -= count; \
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if (packetHeader & 0x80) { /* run-length packet */ \
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expand (pixcol, count, &dataByte, cmap); \
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} else { /* non run-length packet */ \
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while (count--) \
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expand (pixcol, 1, &dataByte, cmap); \
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} \
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column = columns; \
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pixcol = pixrow; \
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pixrow += span; \
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if (rows-- <= 0) \
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goto done_##expand; \
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} \
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column -= packetSize; \
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if (packetHeader & 0x80) { /* run-length packet */ \
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pixcol = expand (pixcol, packetSize, &dataByte, cmap); \
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} else { /* non run-length packet */ \
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while (packetSize--) \
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pixcol = expand (pixcol, 1, &dataByte, cmap); \
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} \
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} \
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} \
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done_##expand:; \
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} while (0)
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static void
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decode_colormap_rle (TargaHeader *targa, tex_t *tex, byte *dataByte)
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{
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byte *pixcol, *pixrow;
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cmap_t *cmap;
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int column, columns, rows, span;
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cmap = parse_colormap (targa, &dataByte);
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tex->format = tex_rgba;
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columns = targa->width;
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rows = targa->height;
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setup_pixrow_span (targa, tex, &pixrow, &span, 4);
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if (targa->attributes & 0x10) // right to left
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rle_expand (reverse_read_cmap);
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else // left to right
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rle_expand (read_cmap);
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}
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static void
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decode_truecolor_24_rle (TargaHeader *targa, tex_t *tex, byte *dataByte)
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{
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byte *pixcol, *pixrow;
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int column, columns, rows, span;
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cmap_t *cmap = 0; // not really used but needed for rle_expand
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columns = targa->width;
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rows = targa->height;
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setup_pixrow_span (targa, tex, &pixrow, &span, 4);
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if (targa->attributes & 0x10) // right to left
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rle_expand (reverse_read_bgr);
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else // left to right
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rle_expand (read_bgr);
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}
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static void
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decode_truecolor_32_rle (TargaHeader *targa, tex_t *tex, byte *dataByte)
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{
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byte *pixcol, *pixrow;
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int column, columns, rows, span;
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cmap_t *cmap = 0; // not really used but needed for rle_expand
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columns = targa->width;
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rows = targa->height;
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setup_pixrow_span (targa, tex, &pixrow, &span, 4);
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if (targa->attributes & 0x10) // right to left
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rle_expand (reverse_read_bgra);
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else // left to right
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rle_expand (read_bgra);
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}
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static void
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decode_truecolor (TargaHeader *targa, tex_t *tex, byte *dataByte)
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{
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dataByte = skip_colormap (targa, dataByte);
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switch (targa->pixel_size) {
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case 24:
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tex->format = tex_rgba; // image gets expadned to rgba
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decode_truecolor_24 (targa, tex, dataByte);
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break;
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case 32:
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tex->format = tex_rgba;
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decode_truecolor_32 (targa, tex, dataByte);
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break;
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default:
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Sys_Error ("LoadTGA: unsupported pixel size");
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}
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}
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static void
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decode_truecolor_rle (TargaHeader *targa, tex_t *tex, byte *dataByte)
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{
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dataByte = skip_colormap (targa, dataByte);
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switch (targa->pixel_size) {
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case 24:
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tex->format = tex_rgba; // image gets expadned to rgba
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decode_truecolor_24_rle (targa, tex, dataByte);
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break;
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case 32:
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tex->format = tex_rgba;
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decode_truecolor_32_rle (targa, tex, dataByte);
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break;
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default:
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Sys_Error ("LoadTGA: unsupported truecolor pixel size");
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}
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|
}
|
|
|
|
static void
|
|
decode_greyscale (TargaHeader *targa, tex_t *tex, byte *dataByte)
|
|
{
|
|
byte *pixcol, *pixrow;
|
|
int column, columns, rows, span;
|
|
|
|
dataByte = skip_colormap (targa, dataByte);
|
|
|
|
if (targa->pixel_size != 8)
|
|
Sys_Error ("LoadTGA: unsupported truecolor pixel size");
|
|
tex->format = tex_l;
|
|
|
|
columns = targa->width;
|
|
rows = targa->height;
|
|
|
|
setup_pixrow_span (targa, tex, &pixrow, &span, 1);
|
|
|
|
if (targa->attributes & 0x10) {
|
|
// right to left
|
|
while (rows-- > 0) {
|
|
pixcol = pixrow;
|
|
for (column = columns; column > 0; column--)
|
|
pixcol = reverse_read_l (pixcol, 1, &dataByte, 0);
|
|
pixrow += span;
|
|
}
|
|
} else {
|
|
// left to right
|
|
while (rows-- > 0) {
|
|
pixcol = pixrow;
|
|
for (column = columns; column > 0; column--)
|
|
pixcol = read_l (pixcol, 1, &dataByte, 0);
|
|
pixrow += span;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
decode_greyscale_rle (TargaHeader *targa, tex_t *tex, byte *dataByte)
|
|
{
|
|
byte *pixcol, *pixrow;
|
|
int column, columns, rows, span;
|
|
cmap_t *cmap = 0; // not really used but needed for rle_expand
|
|
|
|
dataByte = skip_colormap (targa, dataByte);
|
|
|
|
if (targa->pixel_size != 8)
|
|
Sys_Error ("LoadTGA: unsupported truecolor pixel size");
|
|
tex->format = tex_l;
|
|
|
|
columns = targa->width;
|
|
rows = targa->height;
|
|
|
|
setup_pixrow_span (targa, tex, &pixrow, &span, 1);
|
|
|
|
if (targa->attributes & 0x10) // right to left
|
|
rle_expand (reverse_read_l);
|
|
else // left to right
|
|
rle_expand (read_l);
|
|
}
|
|
|
|
typedef void (*decoder_t) (TargaHeader *, tex_t *, byte *);
|
|
static decoder_t decoder_functions[] = {
|
|
0, // 0 invalid
|
|
decode_colormap,
|
|
decode_truecolor,
|
|
decode_greyscale,
|
|
0, 0, 0, 0, // 5-7 invalid
|
|
0, // 8 invalid
|
|
decode_colormap_rle,
|
|
decode_truecolor_rle,
|
|
decode_greyscale_rle,
|
|
0, 0, 0, 0, // 12-15 invalid
|
|
};
|
|
#define NUM_DECODERS (sizeof (decoder_functions) \
|
|
/ sizeof (decoder_functions[0]))
|
|
|
|
struct tex_s *
|
|
LoadTGA (QFile *fin, int load)
|
|
{
|
|
byte *dataByte;
|
|
decoder_t decode;
|
|
int fsize = sizeof (TargaHeader);
|
|
int numPixels;
|
|
size_t targa_mark;
|
|
TargaHeader *targa;
|
|
tex_t *tex;
|
|
|
|
if (load) {
|
|
fsize = Qfilesize (fin);
|
|
}
|
|
targa_mark = Hunk_LowMark (0);
|
|
targa = Hunk_AllocName (0, fsize, "TGA");
|
|
Qread (fin, targa, fsize);
|
|
|
|
targa->colormap_index = LittleShort (targa->colormap_index);
|
|
targa->colormap_length = LittleShort (targa->colormap_length);
|
|
targa->x_origin = LittleShort (targa->x_origin);
|
|
targa->y_origin = LittleShort (targa->y_origin);
|
|
targa->width = LittleShort (targa->width);
|
|
targa->height = LittleShort (targa->height);
|
|
|
|
if (targa->image_type >= NUM_DECODERS
|
|
|| !(decode = decoder_functions[targa->image_type])) {
|
|
Sys_Printf ("LoadTGA: Unsupported targa type");
|
|
Hunk_FreeToLowMark (0, targa_mark);
|
|
return 0;
|
|
}
|
|
|
|
if (load) {
|
|
numPixels = targa->width * targa->height;
|
|
} else {
|
|
numPixels = 0;
|
|
}
|
|
tex = Hunk_TempAlloc (0, sizeof (tex_t) + numPixels * 4);
|
|
tex->data = (byte *) (tex + 1);
|
|
tex->width = targa->width;
|
|
tex->height = targa->height;
|
|
tex->palette = 0;
|
|
tex->loaded = load;
|
|
|
|
if (load) {
|
|
// skip TARGA image comment
|
|
dataByte = (byte *) (targa + 1);
|
|
dataByte += targa->id_length;
|
|
|
|
decode (targa, tex, dataByte);
|
|
}
|
|
|
|
Hunk_FreeToLowMark (0, targa_mark);
|
|
return tex;
|
|
}
|
|
|
|
VISIBLE void
|
|
WriteTGAfile (const char *tganame, byte *data, int width, int height)
|
|
{
|
|
QFile *qfile;
|
|
TargaHeader header;
|
|
|
|
memset (&header, 0, sizeof (header));
|
|
header.image_type = 2; // uncompressed type
|
|
header.width = LittleShort (width);
|
|
header.height = LittleShort (height);
|
|
header.pixel_size = 24;
|
|
|
|
qfile = QFS_WOpen (tganame, 0);
|
|
if (!qfile) {
|
|
Sys_Printf ("Error opening %s", tganame);
|
|
return;
|
|
}
|
|
Qwrite (qfile, &header, sizeof (header));
|
|
Qwrite (qfile, data, width * height * 3);
|
|
Qclose (qfile);
|
|
}
|