#ifndef DPA_QOI_H
#define DPA_QOI_H

#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>

// On AVR, you may want to define "qoi_byte" as "const __flash unsigned char" instead!
#ifndef qoi_byte
#define qoi_byte const unsigned char
#endif

struct qoi_color_rgba {
  unsigned char color[4]; // RGBA
};

struct qoi_decoder {
  qoi_byte*restrict input;
  struct qoi_color_rgba current_color;
  struct qoi_color_rgba table[64];
  unsigned char run;
};
#define QOI_DECODER_INIT(INPUT) (struct qoi_decoder){ .input = (INPUT)+14, .current_color.color[3] = 0xFF, }

static inline bool qoi_check_magic(qoi_byte*restrict a){ return a[0] == 'q' && a[1] == 'o' && a[2] == 'i' && a[3] == 'f'; }
static inline uint32_t qoi_get_width (qoi_byte*restrict a){ return (uint32_t)a[4]<<24 | (uint32_t)a[5]<<16 | (uint32_t)a[ 6]<<8 | (uint32_t)a[ 7]; }
static inline uint32_t qoi_get_height(qoi_byte*restrict a){ return (uint32_t)a[8]<<24 | (uint32_t)a[9]<<16 | (uint32_t)a[10]<<8 | (uint32_t)a[11]; }
static inline unsigned char qoi_get_channels(qoi_byte*restrict a){ return a[12]; }
static inline unsigned char qoi_get_colorspace(qoi_byte*restrict a){ return a[13]; }

void qoi_decode(struct qoi_decoder*restrict state, size_t count, unsigned char*restrict output);

#endif