#ifndef EZ3D_IMAGE_H
#define EZ3D_IMAGE_H

#include "ez3d.h"

/* A decoded image, normalized to separate gray and alpha planes.
 * alpha is always present as an array (255 everywhere when the source
 * PNG has no alpha channel); has_alpha records whether it really did. */
typedef struct {
    int w, h;
    unsigned char *gray;    /* w*h luminance samples, 0..255 */
    unsigned char *alpha;   /* w*h coverage samples, 0..255 */
    int has_alpha;
} ez3d_image_t;

void ez3d_free_image(ez3d_image_t *img);

/* Load a PNG (any input format: gray, gray+alpha, RGB, RGBA, palette...)
 * and normalize it to 8-bit gray + alpha planes. Returns 0 on success,
 * nonzero with a message on stderr otherwise. */
int ez3d_load_image(const char *path, ez3d_image_t *img);

#endif /* EZ3D_IMAGE_H */