56 lines
2 KiB
C
56 lines
2 KiB
C
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* qoi_utils.h :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: maiboyer <maiboyer@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2023/12/24 18:59:56 by maiboyer #+# #+# */
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/* Updated: 2023/12/25 22:33:07 by maiboyer ### ########.fr */
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/* */
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/* ************************************************************************** */
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#ifndef QOI_UTILS_H
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# define QOI_UTILS_H
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# include "me/img/qoi.h"
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# include "me/types.h"
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# define QOI_OP_INDEX 0x00 /* 00xxxxxx */
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# define QOI_OP_DIFF 0x40 /* 01xxxxxx */
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# define QOI_OP_LUMA 0x80 /* 10xxxxxx */
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# define QOI_OP_RUN 0xc0 /* 11xxxxxx */
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# define QOI_OP_RGB 0xfe /* 11111110 */
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# define QOI_OP_RGBA 0xff /* 11111111 */
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# define QOI_MASK_2 0xc0 /* 11000000 */
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# define QOI_MAGIC 0x716f6966u
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//(((t_u32)'q') << 24 | ((t_u32)'o') << 16 | ((t_u32)'i') << 8 | ((t_u32)'f'))
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# define QOI_HEADER_SIZE 14
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/* 2GB is the max file size that this implementation can safely handle. We guard
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against anything larger than that, assuming the worst case with 5 bytes per
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pixel, rounded down to a nice clean value. 400 million pixels ought to be
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enough for anybody. */
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# define QOI_PIXELS_MAX 400000000u
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typedef union u_qoi_rgba
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{
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struct s_qoi_rgba
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{
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t_u8 r;
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t_u8 g;
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t_u8 b;
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t_u8 a;
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} rgba;
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t_u32 v;
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} t_qoi_rgba;
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void qoi_write_32(t_u8 *bytes, t_i32 *p, t_u32 v);
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t_u32 qoi_read_32(const t_u8 *bytes, t_i32 *p);
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static inline t_u32 qoi_color_hash(t_qoi_rgba c)
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{
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return (c.rgba.r * 3 + c.rgba.g * 5 + c.rgba.b * 7 + c.rgba.a * 11);
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}
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#endif /* QOI_UTILS_H */
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