bmp.h

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/* $Id$ */
#ifdef __cplusplus
extern "C" {
#endif
 
    /*
        gd_bmp.c
 
        Bitmap format support for libgd
 
        * Written 2007, Scott MacVicar
        ---------------------------------------------------------------------------
 
        Todo:
 
        RLE4, RLE8 and Bitfield encoding
        Add full support for Windows v4 and Windows v5 header formats
 
        ----------------------------------------------------------------------------
     */
 
#ifndef BMP_H
#define BMP_H   1
 
#define BMP_PALETTE_3 1
#define BMP_PALETTE_4 2
 
#define BMP_WINDOWS_V3 40
#define BMP_OS2_V1 12
#define BMP_OS2_V2 64
#define BMP_WINDOWS_V4 108
#define BMP_WINDOWS_V5 124
 
#define BMP_BI_RGB 0
#define BMP_BI_RLE8 1
#define BMP_BI_RLE4 2
#define BMP_BI_BITFIELDS 3
#define BMP_BI_JPEG 4
#define BMP_BI_PNG 5
 
#define BMP_RLE_COMMAND 0
#define BMP_RLE_ENDOFLINE 0
#define BMP_RLE_ENDOFBITMAP 1
#define BMP_RLE_DELTA 2
 
#define BMP_RLE_TYPE_RAW 0
#define BMP_RLE_TYPE_RLE 1
 
    /* BMP header. */
    typedef struct {
        /* 16 bit - header identifying the type */
        signed short int magic;
 
        /* 32bit - size of the file */
        int size;
 
        /* 16bit - these two are in the spec but "reserved" */
        signed short int reserved1;
        signed short int reserved2;
 
        /* 32 bit - offset of the bitmap header from data in bytes */
        signed int off;
 
    } bmp_hdr_t;
 
    /* BMP info. */
    typedef struct {
        /* 16bit - Type, ie Windows or OS/2 for the palette info */
        signed short int type;
        /* 32bit - The length of the bitmap information header in bytes. */
        signed int len;
 
        /* 32bit - The width of the bitmap in pixels. */
        signed int width;
 
        /* 32bit - The height of the bitmap in pixels. */
        signed int height;
 
        /* 8 bit - The bitmap data is specified in top-down order. */
        signed char topdown;
 
        /* 16 bit - The number of planes.  This must be set to a value of one. */
        signed short int numplanes;
 
        /* 16 bit - The number of bits per pixel. */
        signed short int depth;
 
        /* 32bit - The type of compression used. */
        signed int enctype;
 
        /* 32bit - The size of the image in bytes. */
        signed int size;
 
        /* 32bit - The horizontal resolution in pixels/metre. */
        signed int hres;
 
        /* 32bit - The vertical resolution in pixels/metre. */
        signed int vres;
 
        /* 32bit - The number of color indices used by the bitmap. */
        signed int numcolors;
 
        /* 32bit - The number of color indices important for displaying the bitmap. */
        signed int mincolors;
 
    } bmp_info_t;
 
#endif
 
#ifdef __cplusplus
}
#endif