gtkradiant/plugins/image/bmp.h

/*
Copyright (C) 1999-2007 id Software, Inc. and contributors.
For a list of contributors, see the accompanying CONTRIBUTORS file.

This file is part of GtkRadiant.

GtkRadiant 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.

GtkRadiant 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 GtkRadiant; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

#ifndef _BMP_H
#define _BMP_H

#define xBI_NONE  0
#define xBI_RGB   0
#define xBI_RLE4  2
#define xBI_RLE8  1

#define BMP_SIGNATURE_WORD  0x4d42

#pragma pack(push)
#pragma pack(1)

typedef struct {
    unsigned short    bfType;       // signature - 'BM'
    unsigned long     bfSize;       // file size in bytes
    unsigned short    bfReserved1;  // 0
    unsigned short    bfReserved2;  // 0
    unsigned long     bfOffBits;    // offset to bitmap
} bmphd_t;



typedef struct {
    unsigned long     biSize;       // size of this struct
    long              biWidth;      // bmap width in pixels
    long              biHeight;     // bmap height in pixels
    unsigned short    biPlanes;     // num planes - always 1
    unsigned short    biBitCount;   // bits perpixel
    unsigned long     biCompression; // compression flag
    unsigned long     biSizeImage;   // image size in bytes
    long              biXPelsPerMeter; // horz resolution
    long              biYPelsPerMeter; // vert resolution
    unsigned long     biClrUsed;       // 0 -> color table size
    unsigned long     biClrImportant;  // important color count
} binfo_t;


typedef struct {
    unsigned char blue;
    unsigned char green;
    unsigned char red;
    unsigned char reserved;
} drgb_t;


// quake expects its palette to be bgr
// this is totally backwards but what can you do
typedef struct {
    unsigned char r;
    unsigned char g;
    unsigned char b;
} rgb_t;


typedef struct {
    unsigned char b;
    unsigned char g;
    unsigned char r;
} bgr_t;


typedef struct {
	int            bpp;        // bits per pixel
    int            width;
    int            height;
    unsigned char *data;
    rgb_t         *palette;
} bitmap_t;


void LoadBMP(char *filename, bitmap_t *bit);
void FreeBMP(bitmap_t *bitmap);
void WriteBMP(char *filename, bitmap_t *bit);
void NewBMP(int width, int height, int bpp, bitmap_t *bit);

#pragma pack(pop)

#endif