mirror of
https://github.com/UberGames/lilium-voyager.git
synced 2024-12-14 14:11:15 +00:00
243 lines
6 KiB
C
243 lines
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;
|
|
|
|
typedef struct
|
|
{
|
|
char id[2];
|
|
unsigned fileSize;
|
|
unsigned reserved0;
|
|
unsigned bitmapDataOffset;
|
|
unsigned bitmapHeaderSize;
|
|
unsigned width;
|
|
unsigned height;
|
|
unsigned short planes;
|
|
unsigned short bitsPerPixel;
|
|
unsigned compression;
|
|
unsigned bitmapDataSize;
|
|
unsigned hRes;
|
|
unsigned vRes;
|
|
unsigned colors;
|
|
unsigned importantColors;
|
|
unsigned char palette[256][4];
|
|
} BMPHeader_t;
|
|
|
|
void R_LoadBMP( const char *name, byte **pic, int *width, int *height )
|
|
{
|
|
int columns, rows;
|
|
unsigned numPixels;
|
|
byte *pixbuf;
|
|
int row, column;
|
|
byte *buf_p;
|
|
byte *end;
|
|
union {
|
|
byte *b;
|
|
void *v;
|
|
} buffer;
|
|
int length;
|
|
BMPHeader_t bmpHeader;
|
|
byte *bmpRGBA;
|
|
|
|
*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 < 54)
|
|
{
|
|
ri.Error( ERR_DROP, "LoadBMP: header too short (%s)", name );
|
|
}
|
|
|
|
buf_p = buffer.b;
|
|
end = buffer.b + length;
|
|
|
|
bmpHeader.id[0] = *buf_p++;
|
|
bmpHeader.id[1] = *buf_p++;
|
|
bmpHeader.fileSize = LittleLong( * ( int * ) buf_p );
|
|
buf_p += 4;
|
|
bmpHeader.reserved0 = LittleLong( * ( int * ) buf_p );
|
|
buf_p += 4;
|
|
bmpHeader.bitmapDataOffset = LittleLong( * ( int * ) buf_p );
|
|
buf_p += 4;
|
|
bmpHeader.bitmapHeaderSize = LittleLong( * ( int * ) buf_p );
|
|
buf_p += 4;
|
|
bmpHeader.width = LittleLong( * ( int * ) buf_p );
|
|
buf_p += 4;
|
|
bmpHeader.height = LittleLong( * ( int * ) buf_p );
|
|
buf_p += 4;
|
|
bmpHeader.planes = LittleShort( * ( short * ) buf_p );
|
|
buf_p += 2;
|
|
bmpHeader.bitsPerPixel = LittleShort( * ( short * ) buf_p );
|
|
buf_p += 2;
|
|
bmpHeader.compression = LittleLong( * ( int * ) buf_p );
|
|
buf_p += 4;
|
|
bmpHeader.bitmapDataSize = LittleLong( * ( int * ) buf_p );
|
|
buf_p += 4;
|
|
bmpHeader.hRes = LittleLong( * ( int * ) buf_p );
|
|
buf_p += 4;
|
|
bmpHeader.vRes = LittleLong( * ( int * ) buf_p );
|
|
buf_p += 4;
|
|
bmpHeader.colors = LittleLong( * ( int * ) buf_p );
|
|
buf_p += 4;
|
|
bmpHeader.importantColors = LittleLong( * ( int * ) buf_p );
|
|
buf_p += 4;
|
|
|
|
if ( bmpHeader.bitsPerPixel == 8 )
|
|
{
|
|
if (buf_p + sizeof(bmpHeader.palette) > end)
|
|
ri.Error( ERR_DROP, "LoadBMP: header too short (%s)", name );
|
|
|
|
Com_Memcpy( bmpHeader.palette, buf_p, sizeof( bmpHeader.palette ) );
|
|
buf_p += sizeof(bmpHeader.palette);
|
|
}
|
|
|
|
if (buffer.b + bmpHeader.bitmapDataOffset > end)
|
|
{
|
|
ri.Error( ERR_DROP, "LoadBMP: invalid offset value in header (%s)", name );
|
|
}
|
|
|
|
buf_p = buffer.b + bmpHeader.bitmapDataOffset;
|
|
|
|
if ( bmpHeader.id[0] != 'B' && bmpHeader.id[1] != 'M' )
|
|
{
|
|
ri.Error( ERR_DROP, "LoadBMP: only Windows-style BMP files supported (%s)", name );
|
|
}
|
|
if ( bmpHeader.fileSize != length )
|
|
{
|
|
ri.Error( ERR_DROP, "LoadBMP: header size does not match file size (%u vs. %u) (%s)", bmpHeader.fileSize, length, name );
|
|
}
|
|
if ( bmpHeader.compression != 0 )
|
|
{
|
|
ri.Error( ERR_DROP, "LoadBMP: only uncompressed BMP files supported (%s)", name );
|
|
}
|
|
if ( bmpHeader.bitsPerPixel < 8 )
|
|
{
|
|
ri.Error( ERR_DROP, "LoadBMP: monochrome and 4-bit BMP files not supported (%s)", name );
|
|
}
|
|
|
|
switch ( bmpHeader.bitsPerPixel )
|
|
{
|
|
case 8:
|
|
case 16:
|
|
case 24:
|
|
case 32:
|
|
break;
|
|
default:
|
|
ri.Error( ERR_DROP, "LoadBMP: illegal pixel_size '%hu' in file '%s'", bmpHeader.bitsPerPixel, name );
|
|
break;
|
|
}
|
|
|
|
columns = bmpHeader.width;
|
|
rows = bmpHeader.height;
|
|
if ( rows < 0 )
|
|
rows = -rows;
|
|
numPixels = columns * rows;
|
|
|
|
if(columns <= 0 || !rows || numPixels > 0x1FFFFFFF // 4*1FFFFFFF == 0x7FFFFFFC < 0x7FFFFFFF
|
|
|| ((numPixels * 4) / columns) / 4 != rows)
|
|
{
|
|
ri.Error (ERR_DROP, "LoadBMP: %s has an invalid image size", name);
|
|
}
|
|
if(buf_p + numPixels*bmpHeader.bitsPerPixel/8 > end)
|
|
{
|
|
ri.Error (ERR_DROP, "LoadBMP: file truncated (%s)", name);
|
|
}
|
|
|
|
if ( width )
|
|
*width = columns;
|
|
if ( height )
|
|
*height = rows;
|
|
|
|
bmpRGBA = ri.Malloc( numPixels * 4 );
|
|
*pic = bmpRGBA;
|
|
|
|
|
|
for ( row = rows-1; row >= 0; row-- )
|
|
{
|
|
pixbuf = bmpRGBA + row*columns*4;
|
|
|
|
for ( column = 0; column < columns; column++ )
|
|
{
|
|
unsigned char red, green, blue, alpha;
|
|
int palIndex;
|
|
unsigned short shortPixel;
|
|
|
|
switch ( bmpHeader.bitsPerPixel )
|
|
{
|
|
case 8:
|
|
palIndex = *buf_p++;
|
|
*pixbuf++ = bmpHeader.palette[palIndex][2];
|
|
*pixbuf++ = bmpHeader.palette[palIndex][1];
|
|
*pixbuf++ = bmpHeader.palette[palIndex][0];
|
|
*pixbuf++ = 0xff;
|
|
break;
|
|
case 16:
|
|
shortPixel = * ( unsigned short * ) pixbuf;
|
|
pixbuf += 2;
|
|
*pixbuf++ = ( shortPixel & ( 31 << 10 ) ) >> 7;
|
|
*pixbuf++ = ( shortPixel & ( 31 << 5 ) ) >> 2;
|
|
*pixbuf++ = ( shortPixel & ( 31 ) ) << 3;
|
|
*pixbuf++ = 0xff;
|
|
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++;
|
|
alpha = *buf_p++;
|
|
*pixbuf++ = red;
|
|
*pixbuf++ = green;
|
|
*pixbuf++ = blue;
|
|
*pixbuf++ = alpha;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
ri.FS_FreeFile( buffer.v );
|
|
|
|
}
|