lv_img_decoder.h

Go to the documentation of this file.

 
#ifndef LV_IMG_DECODER_H
#define LV_IMG_DECODER_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
/*********************
 *      INCLUDES
 *********************/
#include "../lv_conf_internal.h"
 
#include <stdint.h>
#include "lv_img_buf.h"
#include "../misc/lv_fs.h"
#include "../misc/lv_types.h"
#include "../misc/lv_area.h"
 
/*********************
 *      DEFINES
 *********************/
 
/**********************
 *      TYPEDEFS
 **********************/
 
enum {
    LV_IMG_SRC_VARIABLE, 
    LV_IMG_SRC_FILE, 
    LV_IMG_SRC_SYMBOL, 
    LV_IMG_SRC_UNKNOWN, 
};
 
typedef uint8_t lv_img_src_t;
 
/*Decoder function definitions*/
struct _lv_img_decoder_dsc_t;
struct _lv_img_decoder_t;
 
typedef lv_res_t (*lv_img_decoder_info_f_t)(struct _lv_img_decoder_t * decoder, const void * src,
                                            lv_img_header_t * header);
 
typedef lv_res_t (*lv_img_decoder_open_f_t)(struct _lv_img_decoder_t * decoder, struct _lv_img_decoder_dsc_t * dsc);
 
typedef lv_res_t (*lv_img_decoder_read_line_f_t)(struct _lv_img_decoder_t * decoder, struct _lv_img_decoder_dsc_t * dsc,
                                                 lv_coord_t x, lv_coord_t y, lv_coord_t len, uint8_t * buf);
 
typedef void (*lv_img_decoder_close_f_t)(struct _lv_img_decoder_t * decoder, struct _lv_img_decoder_dsc_t * dsc);
 
 
typedef struct _lv_img_decoder_t {
    lv_img_decoder_info_f_t info_cb;
    lv_img_decoder_open_f_t open_cb;
    lv_img_decoder_read_line_f_t read_line_cb;
    lv_img_decoder_close_f_t close_cb;
 
#if LV_USE_USER_DATA
    void * user_data;
#endif
} lv_img_decoder_t;
 
 
typedef struct _lv_img_decoder_dsc_t {
    lv_img_decoder_t * decoder;
 
    const void * src;
 
    lv_color_t color;
 
    int32_t frame_id;
 
    lv_img_src_t src_type;
 
    lv_img_header_t header;
 
    const uint8_t * img_data;
 
    uint32_t time_to_open;
 
    const char * error_msg;
 
    void * user_data;
} lv_img_decoder_dsc_t;
 
/**********************
 * GLOBAL PROTOTYPES
 **********************/
 
void _lv_img_decoder_init(void);
 
lv_res_t lv_img_decoder_get_info(const void * src, lv_img_header_t * header);
 
lv_res_t lv_img_decoder_open(lv_img_decoder_dsc_t * dsc, const void * src, lv_color_t color, int32_t frame_id);
 
lv_res_t lv_img_decoder_read_line(lv_img_decoder_dsc_t * dsc, lv_coord_t x, lv_coord_t y, lv_coord_t len,
                                  uint8_t * buf);
 
void lv_img_decoder_close(lv_img_decoder_dsc_t * dsc);
 
lv_img_decoder_t * lv_img_decoder_create(void);
 
void lv_img_decoder_delete(lv_img_decoder_t * decoder);
 
void lv_img_decoder_set_info_cb(lv_img_decoder_t * decoder, lv_img_decoder_info_f_t info_cb);
 
void lv_img_decoder_set_open_cb(lv_img_decoder_t * decoder, lv_img_decoder_open_f_t open_cb);
 
void lv_img_decoder_set_read_line_cb(lv_img_decoder_t * decoder, lv_img_decoder_read_line_f_t read_line_cb);
 
void lv_img_decoder_set_close_cb(lv_img_decoder_t * decoder, lv_img_decoder_close_f_t close_cb);
 
lv_res_t lv_img_decoder_built_in_info(lv_img_decoder_t * decoder, const void * src, lv_img_header_t * header);
 
lv_res_t lv_img_decoder_built_in_open(lv_img_decoder_t * decoder, lv_img_decoder_dsc_t * dsc);
 
lv_res_t lv_img_decoder_built_in_read_line(lv_img_decoder_t * decoder, lv_img_decoder_dsc_t * dsc, lv_coord_t x,
                                           lv_coord_t y, lv_coord_t len, uint8_t * buf);
 
void lv_img_decoder_built_in_close(lv_img_decoder_t * decoder, lv_img_decoder_dsc_t * dsc);
 
/**********************
 *      MACROS
 **********************/
 
#ifdef __cplusplus
} /*extern "C"*/
#endif
 
#endif /*LV_IMG_DECODER_H*/