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