Initial import.

1 files changed, 240 insertions, 0 deletions

diff --git a/src/renderer/tr_image_bmp.c b/src/renderer/tr_image_bmp.c
new file mode 100644
index 0000000..7537312
--- /dev/null
+++ b/src/renderer/tr_image_bmp.c
@@ -0,0 +1,240 @@
+/*
+===========================================================================
+Copyright (C) 1999-2005 Id Software, Inc.
+Copyright (C) 2000-2009 Darklegion Development
+
+This file is part of Tremulous.
+
+Tremulous 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.
+
+Tremulous 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 Tremulous; if not, write to the Free Software
+Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+===========================================================================
+*/
+
+#include "tr_local.h"
+
+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)\n", 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)\n", 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)\n", 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)\n", name );
+	}
+	if ( bmpHeader.fileSize != length )
+	{
+		ri.Error( ERR_DROP, "LoadBMP: header size does not match file size (%u vs. %u) (%s)\n", bmpHeader.fileSize, length, name );
+	}
+	if ( bmpHeader.compression != 0 )
+	{
+		ri.Error( ERR_DROP, "LoadBMP: only uncompressed BMP files supported (%s)\n", name );
+	}
+	if ( bmpHeader.bitsPerPixel < 8 )
+	{
+		ri.Error( ERR_DROP, "LoadBMP: monochrome and 4-bit BMP files not supported (%s)\n", 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'\n", 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\n", name);
+	}
+	if(buf_p + numPixels*bmpHeader.bitsPerPixel/8 > end)
+	{
+	  ri.Error (ERR_DROP, "LoadBMP: file truncated (%s)\n", 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 );
+
+}