lv_draw.h

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#ifndef LV_DRAW_H
#define LV_DRAW_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
/*********************
 *      INCLUDES
 *********************/
#include "../lv_conf_internal.h"
 
#include "../misc/lv_style.h"
#include "../misc/lv_txt.h"
#include "lv_img_decoder.h"
#include "lv_img_cache.h"
 
#include "lv_draw_rect.h"
#include "lv_draw_label.h"
#include "lv_draw_img.h"
#include "lv_draw_line.h"
#include "lv_draw_triangle.h"
#include "lv_draw_arc.h"
#include "lv_draw_mask.h"
#include "lv_draw_transform.h"
#include "lv_draw_layer.h"
 
/*********************
 *      DEFINES
 *********************/
 
/**********************
 *      TYPEDEFS
 **********************/
 
typedef struct {
    void * user_data;
} lv_draw_mask_t;
 
typedef struct _lv_draw_layer_ctx_t {
    lv_area_t area_full;
    lv_area_t area_act;
    lv_coord_t max_row_with_alpha;
    lv_coord_t max_row_with_no_alpha;
    void * buf;
    struct {
        const lv_area_t * clip_area;
        lv_area_t * buf_area;
        void * buf;
        bool screen_transp;
    } original;
} lv_draw_layer_ctx_t;
 
typedef struct _lv_draw_ctx_t  {
    void * buf;
 
    lv_area_t * buf_area;
 
    const lv_area_t * clip_area;
 
    void (*init_buf)(struct _lv_draw_ctx_t * draw_ctx);
 
    void (*draw_rect)(struct _lv_draw_ctx_t * draw_ctx, const lv_draw_rect_dsc_t * dsc, const lv_area_t * coords);
 
    void (*draw_arc)(struct _lv_draw_ctx_t * draw_ctx, const lv_draw_arc_dsc_t * dsc, const lv_point_t * center,
                     uint16_t radius,  uint16_t start_angle, uint16_t end_angle);
 
    void (*draw_img_decoded)(struct _lv_draw_ctx_t * draw_ctx, const lv_draw_img_dsc_t * dsc,
                             const lv_area_t * coords, const uint8_t * map_p, lv_img_cf_t color_format);
 
    lv_res_t (*draw_img)(struct _lv_draw_ctx_t * draw_ctx, const lv_draw_img_dsc_t * draw_dsc,
                         const lv_area_t * coords, const void * src);
 
    void (*draw_letter)(struct _lv_draw_ctx_t * draw_ctx, const lv_draw_label_dsc_t * dsc,  const lv_point_t * pos_p,
                        uint32_t letter);
 
 
    void (*draw_line)(struct _lv_draw_ctx_t * draw_ctx, const lv_draw_line_dsc_t * dsc, const lv_point_t * point1,
                      const lv_point_t * point2);
 
 
    void (*draw_polygon)(struct _lv_draw_ctx_t * draw_ctx, const lv_draw_rect_dsc_t * draw_dsc,
                         const lv_point_t * points, uint16_t point_cnt);
 
 
    void (*draw_transform)(struct _lv_draw_ctx_t * draw_ctx, const lv_area_t * dest_area, const void * src_buf,
                           lv_coord_t src_w, lv_coord_t src_h, lv_coord_t src_stride,
                           const lv_draw_img_dsc_t * draw_dsc, lv_img_cf_t cf, lv_color_t * cbuf, lv_opa_t * abuf);
 
    void (*draw_bg)(struct _lv_draw_ctx_t * draw_ctx, const lv_draw_rect_dsc_t * draw_dsc, const lv_area_t * coords);
 
    void (*wait_for_finish)(struct _lv_draw_ctx_t * draw_ctx);
 
    void (*buffer_copy)(struct _lv_draw_ctx_t * draw_ctx, void * dest_buf, lv_coord_t dest_stride,
                        const lv_area_t * dest_area,
                        void * src_buf, lv_coord_t src_stride, const lv_area_t * src_area);
 
    struct _lv_draw_layer_ctx_t * (*layer_init)(struct _lv_draw_ctx_t * draw_ctx, struct _lv_draw_layer_ctx_t * layer_ctx,
                                                lv_draw_layer_flags_t flags);
 
    void (*layer_adjust)(struct _lv_draw_ctx_t * draw_ctx, struct _lv_draw_layer_ctx_t * layer_ctx,
                         lv_draw_layer_flags_t flags);
 
    void (*layer_blend)(struct _lv_draw_ctx_t * draw_ctx, struct _lv_draw_layer_ctx_t * layer_ctx,
                        const lv_draw_img_dsc_t * draw_dsc);
 
    void (*layer_destroy)(struct _lv_draw_ctx_t * draw_ctx, lv_draw_layer_ctx_t * layer_ctx);
 
    size_t layer_instance_size;
 
#if LV_USE_USER_DATA
    void * user_data;
#endif
 
} lv_draw_ctx_t;
 
/**********************
 * GLOBAL PROTOTYPES
 **********************/
 
void lv_draw_init(void);
 
 
void lv_draw_wait_for_finish(lv_draw_ctx_t * draw_ctx);
 
/**********************
 *  GLOBAL VARIABLES
 **********************/
 
/**********************
 *      MACROS
 **********************/
 
/**********************
 *   POST INCLUDES
 *********************/
 
#ifdef __cplusplus
} /*extern "C"*/
#endif
 
#endif /*LV_DRAW_H*/