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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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73
stdme/src/img/qoi/qoi_decode.c Normal file
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/* ************************************************************************** */
/* */
/* ::: :::::::: */
/* qoi_decode.c :+: :+: :+: */
/* +:+ +:+ +:+ */
/* By: maiboyer <maiboyer@student.42.fr> +#+ +:+ +#+ */
/* +#+#+#+#+#+ +#+ */
/* Created: 2023/12/25 22:31:40 by maiboyer #+# #+# */
/* Updated: 2023/12/25 22:35:44 by maiboyer ### ########.fr */
/* */
/* ************************************************************************** */
#include "me/img/qoi.h"
#include "me/img/qoi/qoi_utils.h"
#include "me/img/qoi/qoi_decode.h"
static inline void *qoi_decode_inner(t_decode_vals *vals, const t_u8 *bytes,
t_i32 channels, t_i32 size)
{
t_u8 *pixels;
pixels = (t_u8 *)mem_alloc(vals->px_len);
if (!pixels)
return (NULL);
mem_set_zero(vals->index, sizeof(vals->index));
vals->px.v = 0;
vals->px.rgba.a = 255;
vals->chunks_len = size - (t_i32) sizeof(t_u8[8]);
vals->px_pos = 0;
while (vals->px_pos < vals->px_len)
{
if (vals->run > 0)
vals->run--;
else if (vals->p < vals->chunks_len)
qoi_decode_inner_inner(vals, bytes);
pixels[vals->px_pos + 0] = vals->px.rgba.r;
pixels[vals->px_pos + 1] = vals->px.rgba.g;
pixels[vals->px_pos + 2] = vals->px.rgba.b;
if (channels == 4)
pixels[vals->px_pos + 3] = vals->px.rgba.a;
vals->px_pos += channels;
}
return (pixels);
}
void *qoi_decode(const void *data, t_i32 size, t_qoi_desc *desc,
t_i32 channels)
{
const t_u8 *bytes;
t_decode_vals vals;
vals.p = 0;
vals.run = 0;
if (data == NULL || desc == NULL || (channels != 0 && channels != 3
&& channels != 4) || size < QOI_HEADER_SIZE
+ (t_i32) sizeof(t_u8[8]))
return (NULL);
bytes = (const t_u8 *)data;
vals.header_magic = qoi_read_32(bytes, &vals.p);
desc->width = qoi_read_32(bytes, &vals.p);
desc->height = qoi_read_32(bytes, &vals.p);
desc->channels = bytes[vals.p++];
desc->colorspace = bytes[vals.p++];
if (desc->width == 0 || desc->height == 0 || desc->channels < 3
|| desc->channels > 4 || desc->colorspace > 1
|| vals.header_magic != QOI_MAGIC || desc->height >= QOI_PIXELS_MAX
/ desc->width)
return (NULL);
if (channels == 0)
channels = desc->channels;
vals.px_len = desc->width * desc->height * channels;
return (qoi_decode_inner(&vals, bytes, channels, size));
}