/* Capas. Opacidad 0..255. Una capa bloqueada rechaza ediciones de píxeles. */
#ifndef TAHGIBU_LAYER_H
#define TAHGIBU_LAYER_H

#include "tahgibu/document.h"

#ifdef __cplusplus
extern "C" {
#endif

size_t tgb_layer_count(const tgb_document *doc);
uint32_t tgb_layer_id(const tgb_document *doc, size_t index);          /* 0 si fuera de rango */
tgb_status tgb_layer_index_of(const tgb_document *doc, uint32_t id, size_t *out_index);
/* El puntero devuelto es válido hasta el siguiente cambio de capas. */
const char *tgb_layer_name(const tgb_document *doc, size_t index);
bool tgb_layer_visible(const tgb_document *doc, size_t index);
bool tgb_layer_locked(const tgb_document *doc, size_t index);
uint8_t tgb_layer_opacity(const tgb_document *doc, size_t index);

tgb_status tgb_layer_add(tgb_document *doc, size_t index, const char *name, uint32_t *out_id);
tgb_status tgb_layer_delete(tgb_document *doc, size_t index);          /* nunca la última */
tgb_status tgb_layer_move(tgb_document *doc, size_t from, size_t to);
tgb_status tgb_layer_rename(tgb_document *doc, size_t index, const char *name);
tgb_status tgb_layer_set_visible(tgb_document *doc, size_t index, bool visible);
tgb_status tgb_layer_set_locked(tgb_document *doc, size_t index, bool locked);
tgb_status tgb_layer_set_opacity(tgb_document *doc, size_t index, uint8_t opacity);

#ifdef __cplusplus
}
#endif
#endif