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Started from buttom go to the sky

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Raphaël 2024-04-28 19:59:01 +02:00
parent 96215449bd
commit f811e55dea
4781 changed files with 10121 additions and 1743 deletions
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stdme/include/me/img/qoi/qoi_decode.h Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* qoi_decode.h :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: maiboyer <maiboyer@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2023/12/25 22:33:19 by maiboyer #+# #+# */
/* Updated: 2023/12/25 22:58:27 by maiboyer ### ########.fr */
/* */
/* ************************************************************************** */
#ifndef QOI_DECODE_H
# define QOI_DECODE_H
# include "me/img/qoi.h"
# include "me/img/qoi/qoi_utils.h"
typedef struct s_decode_vals
{
t_i32 px_len;
t_i32 chunks_len;
t_i32 px_pos;
t_i32 p;
t_i32 run;
t_i32 b1;
t_i32 b2;
t_i32 vg;
t_u32 header_magic;
t_qoi_rgba index[64];
t_qoi_rgba px;
} t_decode_vals;
static inline void qoi_op_luma_decode(t_decode_vals *vals, const t_u8 *bytes)
{
vals->b2 = bytes[vals->p++];
vals->vg = (vals->b1 & 0x3f) - 32;
vals->px.rgba.r += vals->vg - 8 + ((vals->b2 >> 4) & 0x0f);
vals->px.rgba.g += vals->vg;
vals->px.rgba.b += vals->vg - 8 + (vals->b2 & 0x0f);
}
static inline void qoi_op_diff_decode(t_decode_vals *vals, const t_u8 *bytes)
{
(void)(bytes);
vals->px.rgba.r += ((vals->b1 >> 4) & 0x03) - 2;
vals->px.rgba.g += ((vals->b1 >> 2) & 0x03) - 2;
vals->px.rgba.b += (vals->b1 & 0x03) - 2;
}
static inline void qoi_op_rgba_decode(t_decode_vals *vals, const t_u8 *bytes)
{
vals->px.rgba.r = bytes[vals->p++];
vals->px.rgba.g = bytes[vals->p++];
vals->px.rgba.b = bytes[vals->p++];
vals->px.rgba.a = bytes[vals->p++];
}
static inline void qoi_op_rgb_decode(t_decode_vals *vals, const t_u8 *bytes)
{
vals->px.rgba.r = bytes[vals->p++];
vals->px.rgba.g = bytes[vals->p++];
vals->px.rgba.b = bytes[vals->p++];
}
static inline void qoi_decode_inner_inner(t_decode_vals *vals, \
const t_u8 *bytes)
{
vals->b1 = bytes[vals->p++];
if (vals->b1 == QOI_OP_RGB)
qoi_op_rgb_decode(vals, bytes);
else if (vals->b1 == QOI_OP_RGBA)
qoi_op_rgba_decode(vals, bytes);
else if ((vals->b1 & QOI_MASK_2) == QOI_OP_INDEX)
vals->px = vals->index[vals->b1];
else if ((vals->b1 & QOI_MASK_2) == QOI_OP_DIFF)
qoi_op_diff_decode(vals, bytes);
else if ((vals->b1 & QOI_MASK_2) == QOI_OP_LUMA)
qoi_op_luma_decode(vals, bytes);
else if ((vals->b1 & QOI_MASK_2) == QOI_OP_RUN)
vals->run = (vals->b1 & 0x3f);
vals->index[qoi_color_hash(vals->px) % 64] = vals->px;
}
#endif /* QOI_DECODE_H */