gp_bmp.h

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// SPDX-License-Identifier: LGPL-2.1-or-later
/*
 * Copyright (C) 2009-2020 Cyril Hrubis <metan@ucw.cz>
 */
 
#ifndef GP_BMP_H
#define GP_BMP_H
 
struct gp_bmp_info_header {
        uint32_t pixel_offset;
 
        uint32_t header_offset;
 
        uint32_t header_size;
 
        int32_t w;
        int32_t h;
 
        uint16_t bpp;
        uint32_t compress_type;
        uint32_t palette_colors;
        uint32_t R_mask;
        uint32_t G_mask;
        uint32_t B_mask;
        uint32_t A_mask;
};
 
enum gp_bmp_compress {
        COMPRESS_RGB            = 0,
        COMPRESS_RLE8           = 1,
        COMPRESS_RLE4           = 2,
        COMPRESS_BITFIELDS      = 3,
        COMPRESS_JPEG           = 4,
        COMPRESS_PNG            = 5,
        COMPRESS_ALPHABITFIELDS = 6,
        COMPRESS_MAX = COMPRESS_ALPHABITFIELDS,
};
 
enum gp_bmp_info_header_size {
        BITMAPCOREHEADER  = 12,
        BITMAPCOREHEADER2 = 64,
        BITMAPINFOHEADER  = 40,
        BITMAPINFOHEADER2 = 52,
        BITMAPINFOHEADER3 = 56,
        BITMAPINFOHEADER4 = 108,
        BITMAPINFOHEADER5 = 124,
};
 
int gp_bmp_read_info_header(gp_io *io, struct gp_bmp_info_header *header);
 
gp_pixel_type gp_bmp_pixel_type(struct gp_bmp_info_header *header);
 
uint32_t gp_bmp_palette_size(struct gp_bmp_info_header *header);
 
int gp_bmp_read_pixels(gp_io *io, struct gp_bmp_info_header *header,
                       gp_pixmap *pixmap, gp_progress_cb *callback);
 
#endif /* GP_BMP_H */