q3rally/engine/code/rend2/tr_image_tga.c
zturtleman 3b4f4cdfa9 ioquake3 resync to revision 2369 from 2317.
Some revision messages:

Cache servers for each master server in q3_ui, otherwise servers from last updated master for shown for all Internet# sources.
Play correct team sounds when in spectator mode and following a player.
Check last listener number instead of clc.clientNum in S_AL_HearingThroughEntity so sound work correctly when spectate following a client. (Related to bug 5741.)
When in third person, don't play player's sounds as full volume in Base sound system. OpenAL already does this. (Related to bug 5741.)
really fix the confusion with game entity and refentity numbers
to further reduce confusion, rename constants like MAX_ENTITIES to MAX_REFENTITIES
Added Rend2, an alternate renderer. (Bug #4358)
Fix restoring fs_game when default.cfg is missing.
Fix restoring old fs_game upon leaving a server. Patch by Ensiform.
Change more operator commands to require sv_running to be usable. Patch by Ensiform.
Fix some "> MAX_*" to be ">= MAX_*".
Fix follow command to find clients whose name begins with a number.
Fix up "gc" command, make it more like "tell". Based on patch by Ensiform.
Add usage messages for gc, tell, vtell, and votell commands.
Check player names in gc, tell, vtell, and votell commands.
#5799 - Change messagemode text box to display colors like in console input box.
Improve "play" command, based on a patch from Ensiform.
Check for invalid filename in OpenAL's RegisterSound function.
Changed Base sound system to warn not error when sound filename is empty or too long.
Remove references to non-existent functions CM_MarkFragments and CM_LerpTag.
2012-12-06 07:07:19 +00:00

324 lines
8.6 KiB
C

/*
===========================================================================
Copyright (C) 1999-2005 Id Software, Inc.
This file is part of Quake III Arena source code.
Quake III Arena source code 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.
Quake III Arena source code 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 Quake III Arena source code; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
===========================================================================
*/
#include "../qcommon/q_shared.h"
#include "../qcommon/qfiles.h"
#include "../qcommon/qcommon.h"
#include "../renderer/tr_public.h"
extern refimport_t ri;
/*
========================================================================
TGA files are used for 24/32 bit images
========================================================================
*/
typedef struct _TargaHeader {
unsigned char id_length, colormap_type, image_type;
unsigned short colormap_index, colormap_length;
unsigned char colormap_size;
unsigned short x_origin, y_origin, width, height;
unsigned char pixel_size, attributes;
} TargaHeader;
void R_LoadTGA ( const char *name, byte **pic, int *width, int *height)
{
unsigned columns, rows, numPixels;
byte *pixbuf;
int row, column;
byte *buf_p;
byte *end;
union {
byte *b;
void *v;
} buffer;
TargaHeader targa_header;
byte *targa_rgba;
int length;
*pic = NULL;
if(width)
*width = 0;
if(height)
*height = 0;
//
// load the file
//
length = ri.FS_ReadFile ( ( char * ) name, &buffer.v);
if (!buffer.b || length < 0) {
return;
}
if(length < 18)
{
ri.Error( ERR_DROP, "LoadTGA: header too short (%s)", name );
}
buf_p = buffer.b;
end = buffer.b + length;
targa_header.id_length = buf_p[0];
targa_header.colormap_type = buf_p[1];
targa_header.image_type = buf_p[2];
memcpy(&targa_header.colormap_index, &buf_p[3], 2);
memcpy(&targa_header.colormap_length, &buf_p[5], 2);
targa_header.colormap_size = buf_p[7];
memcpy(&targa_header.x_origin, &buf_p[8], 2);
memcpy(&targa_header.y_origin, &buf_p[10], 2);
memcpy(&targa_header.width, &buf_p[12], 2);
memcpy(&targa_header.height, &buf_p[14], 2);
targa_header.pixel_size = buf_p[16];
targa_header.attributes = buf_p[17];
targa_header.colormap_index = LittleShort(targa_header.colormap_index);
targa_header.colormap_length = LittleShort(targa_header.colormap_length);
targa_header.x_origin = LittleShort(targa_header.x_origin);
targa_header.y_origin = LittleShort(targa_header.y_origin);
targa_header.width = LittleShort(targa_header.width);
targa_header.height = LittleShort(targa_header.height);
buf_p += 18;
if (targa_header.image_type!=2
&& targa_header.image_type!=10
&& targa_header.image_type != 3 )
{
ri.Error (ERR_DROP, "LoadTGA: Only type 2 (RGB), 3 (gray), and 10 (RGB) TGA images supported");
}
if ( targa_header.colormap_type != 0 )
{
ri.Error( ERR_DROP, "LoadTGA: colormaps not supported" );
}
if ( ( targa_header.pixel_size != 32 && targa_header.pixel_size != 24 ) && targa_header.image_type != 3 )
{
ri.Error (ERR_DROP, "LoadTGA: Only 32 or 24 bit images supported (no colormaps)");
}
columns = targa_header.width;
rows = targa_header.height;
numPixels = columns * rows * 4;
if(!columns || !rows || numPixels > 0x7FFFFFFF || numPixels / columns / 4 != rows)
{
ri.Error (ERR_DROP, "LoadTGA: %s has an invalid image size", name);
}
targa_rgba = ri.Malloc (numPixels);
if (targa_header.id_length != 0)
{
if (buf_p + targa_header.id_length > end)
ri.Error( ERR_DROP, "LoadTGA: header too short (%s)", name );
buf_p += targa_header.id_length; // skip TARGA image comment
}
if ( targa_header.image_type==2 || targa_header.image_type == 3 )
{
if(buf_p + columns*rows*targa_header.pixel_size/8 > end)
{
ri.Error (ERR_DROP, "LoadTGA: file truncated (%s)", name);
}
// Uncompressed RGB or gray scale image
for(row=rows-1; row>=0; row--)
{
pixbuf = targa_rgba + row*columns*4;
for(column=0; column<columns; column++)
{
unsigned char red,green,blue,alphabyte;
switch (targa_header.pixel_size)
{
case 8:
blue = *buf_p++;
green = blue;
red = blue;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = 255;
break;
case 24:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = 255;
break;
case 32:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
alphabyte = *buf_p++;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alphabyte;
break;
default:
ri.Error( ERR_DROP, "LoadTGA: illegal pixel_size '%d' in file '%s'", targa_header.pixel_size, name );
break;
}
}
}
}
else if (targa_header.image_type==10) { // Runlength encoded RGB images
unsigned char red,green,blue,alphabyte,packetHeader,packetSize,j;
red = 0;
green = 0;
blue = 0;
alphabyte = 0xff;
for(row=rows-1; row>=0; row--) {
pixbuf = targa_rgba + row*columns*4;
for(column=0; column<columns; ) {
if(buf_p + 1 > end)
ri.Error (ERR_DROP, "LoadTGA: file truncated (%s)", name);
packetHeader= *buf_p++;
packetSize = 1 + (packetHeader & 0x7f);
if (packetHeader & 0x80) { // run-length packet
if(buf_p + targa_header.pixel_size/8 > end)
ri.Error (ERR_DROP, "LoadTGA: file truncated (%s)", name);
switch (targa_header.pixel_size) {
case 24:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
alphabyte = 255;
break;
case 32:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
alphabyte = *buf_p++;
break;
default:
ri.Error( ERR_DROP, "LoadTGA: illegal pixel_size '%d' in file '%s'", targa_header.pixel_size, name );
break;
}
for(j=0;j<packetSize;j++) {
*pixbuf++=red;
*pixbuf++=green;
*pixbuf++=blue;
*pixbuf++=alphabyte;
column++;
if (column==columns) { // run spans across rows
column=0;
if (row>0)
row--;
else
goto breakOut;
pixbuf = targa_rgba + row*columns*4;
}
}
}
else { // non run-length packet
if(buf_p + targa_header.pixel_size/8*packetSize > end)
ri.Error (ERR_DROP, "LoadTGA: file truncated (%s)", name);
for(j=0;j<packetSize;j++) {
switch (targa_header.pixel_size) {
case 24:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = 255;
break;
case 32:
blue = *buf_p++;
green = *buf_p++;
red = *buf_p++;
alphabyte = *buf_p++;
*pixbuf++ = red;
*pixbuf++ = green;
*pixbuf++ = blue;
*pixbuf++ = alphabyte;
break;
default:
ri.Error( ERR_DROP, "LoadTGA: illegal pixel_size '%d' in file '%s'", targa_header.pixel_size, name );
break;
}
column++;
if (column==columns) { // pixel packet run spans across rows
column=0;
if (row>0)
row--;
else
goto breakOut;
pixbuf = targa_rgba + row*columns*4;
}
}
}
}
breakOut:;
}
}
#if 0
// TTimo: this is the chunk of code to ensure a behavior that meets TGA specs
// bit 5 set => top-down
if (targa_header.attributes & 0x20) {
unsigned char *flip = (unsigned char*)malloc (columns*4);
unsigned char *src, *dst;
for (row = 0; row < rows/2; row++) {
src = targa_rgba + row * 4 * columns;
dst = targa_rgba + (rows - row - 1) * 4 * columns;
memcpy (flip, src, columns*4);
memcpy (src, dst, columns*4);
memcpy (dst, flip, columns*4);
}
free (flip);
}
#endif
// instead we just print a warning
if (targa_header.attributes & 0x20) {
ri.Printf( PRINT_WARNING, "WARNING: '%s' TGA file header declares top-down image, ignoring\n", name);
}
if (width)
*width = columns;
if (height)
*height = rows;
*pic = targa_rgba;
ri.FS_FreeFile (buffer.v);
}