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Incognito_RCM/bdk/libs/lvgl/lv_objx/lv_canvas.h
2020-12-22 15:34:14 +00:00

229 lines
6.9 KiB
C

/**
* @file lv_canvas.h
*
*/
#ifndef LV_CANVAS_H
#define LV_CANVAS_H
#ifdef __cplusplus
extern "C" {
#endif
/*********************
* INCLUDES
*********************/
#ifdef LV_CONF_INCLUDE_SIMPLE
#include "lv_conf.h"
#else
#include "../../lv_conf.h"
#endif
#if USE_LV_CANVAS != 0
#include "../lv_core/lv_obj.h"
#include "../lv_objx/lv_img.h"
/*********************
* DEFINES
*********************/
/**********************
* TYPEDEFS
**********************/
/*Data of canvas*/
typedef struct {
lv_img_ext_t img; /*Ext. of ancestor*/
/*New data for this type */
lv_img_dsc_t dsc;
} lv_canvas_ext_t;
/*Styles*/
enum {
LV_CANVAS_STYLE_MAIN,
};
typedef uint8_t lv_canvas_style_t;
/**********************
* GLOBAL PROTOTYPES
**********************/
/**
* Create a canvas object
* @param par pointer to an object, it will be the parent of the new canvas
* @param copy pointer to a canvas object, if not NULL then the new object will be copied from it
* @return pointer to the created canvas
*/
lv_obj_t * lv_canvas_create(lv_obj_t * par, const lv_obj_t * copy);
/*=====================
* Setter functions
*====================*/
/**
* Set a buffer for the canvas.
* @param buf a buffer where the content of the canvas will be.
* The required size is (lv_img_color_format_get_px_size(cf) * w * h) / 8)
* It can be allocated with `lv_mem_alloc()` or
* it can be statically allocated array (e.g. static lv_color_t buf[100*50]) or
* it can be an address in RAM or external SRAM
* @param canvas pointer to a canvas object
* @param w width of the canvas
* @param h height of the canvas
* @param cf color format. The following formats are supported:
* LV_IMG_CF_TRUE_COLOR, LV_IMG_CF_TRUE_COLOR_CHROMA_KEYED, LV_IMG_CF_INDEXES_1/2/4/8BIT
*/
void lv_canvas_set_buffer(lv_obj_t * canvas, void * buf, lv_coord_t w, lv_coord_t h, lv_img_cf_t cf);
/**
* Set the color of a pixel on the canvas
* @param canvas
* @param x x coordinate of the point to set
* @param y x coordinate of the point to set
* @param c color of the point
*/
void lv_canvas_set_px(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_color_t c);
/**
* Set a style of a canvas.
* @param canvas pointer to canvas object
* @param type which style should be set
* @param style pointer to a style
*/
void lv_canvas_set_style(lv_obj_t * canvas, lv_canvas_style_t type, lv_style_t * style);
/*=====================
* Getter functions
*====================*/
/**
* Get the color of a pixel on the canvas
* @param canvas
* @param x x coordinate of the point to set
* @param y x coordinate of the point to set
* @return color of the point
*/
lv_color_t lv_canvas_get_px(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y);
/**
* Get style of a canvas.
* @param canvas pointer to canvas object
* @param type which style should be get
* @return style pointer to the style
*/
lv_style_t * lv_canvas_get_style(const lv_obj_t * canvas, lv_canvas_style_t type);
/*=====================
* Other functions
*====================*/
/**
* Copy a buffer to the canvas
* @param canvas pointer to a canvas object
* @param to_copy buffer to copy. The color format has to match with the canvas's buffer color format
* @param w width of the buffer to copy
* @param h height of the buffer to copy
* @param x left side of the destination position
* @param y top side of the destination position
*/
void lv_canvas_copy_buf(lv_obj_t * canvas, const void * to_copy, lv_coord_t w, lv_coord_t h, lv_coord_t x, lv_coord_t y);
/**
* Multiply a buffer with the canvas
* @param canvas pointer to a canvas object
* @param to_copy buffer to copy (multiply). LV_IMG_CF_TRUE_COLOR_ALPHA is not supported
* @param w width of the buffer to copy
* @param h height of the buffer to copy
* @param x left side of the destination position
* @param y top side of the destination position
*/
void lv_canvas_mult_buf(lv_obj_t * canvas, void * to_copy, lv_coord_t w, lv_coord_t h, lv_coord_t x, lv_coord_t y);
/**
* Draw circle function of the canvas
* @param canvas pointer to a canvas object
* @param x0 x coordinate of the circle
* @param y0 y coordinate of the circle
* @param radius radius of the circle
* @param color border color of the circle
*/
void lv_canvas_draw_circle(lv_obj_t * canvas, lv_coord_t x0, lv_coord_t y0, lv_coord_t radius, lv_color_t color);
/**
* Draw line function of the canvas
* @param canvas pointer to a canvas object
* @param point1 start point of the line
* @param point2 end point of the line
* @param color color of the line
*
* NOTE: The lv_canvas_draw_line function originates from https://github.com/jb55/bresenham-line.c.
*/
void lv_canvas_draw_line(lv_obj_t * canvas, lv_point_t point1, lv_point_t point2, lv_color_t color);
/**
* Draw triangle function of the canvas
* @param canvas pointer to a canvas object
* @param points edge points of the triangle
* @param color line color of the triangle
*/
void lv_canvas_draw_triangle(lv_obj_t * canvas, lv_point_t * points, lv_color_t color);
/**
* Draw rectangle function of the canvas
* @param canvas pointer to a canvas object
* @param points edge points of the rectangle
* @param color line color of the rectangle
*/
void lv_canvas_draw_rect(lv_obj_t * canvas, lv_point_t * points, lv_color_t color);
/**
* Draw polygon function of the canvas
* @param canvas pointer to a canvas object
* @param points edge points of the polygon
* @param size edge count of the polygon
* @param color line color of the polygon
*/
void lv_canvas_draw_polygon(lv_obj_t * canvas, lv_point_t * points, size_t size, lv_color_t color);
/**
* Fill polygon function of the canvas
* @param canvas pointer to a canvas object
* @param points edge points of the polygon
* @param size edge count of the polygon
* @param boundary_color line color of the polygon
* @param fill_color fill color of the polygon
*/
void lv_canvas_fill_polygon(lv_obj_t * canvas, lv_point_t * points, size_t size, lv_color_t boundary_color, lv_color_t fill_color);
/**
* Boundary fill function of the canvas
* @param canvas pointer to a canvas object
* @param x x coordinate of the start position (seed)
* @param y y coordinate of the start position (seed)
* @param boundary_color edge/boundary color of the area
* @param fill_color fill color of the area
*/
void lv_canvas_boundary_fill4(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_color_t boundary_color, lv_color_t fill_color);
/**
* Flood fill function of the canvas
* @param canvas pointer to a canvas object
* @param x x coordinate of the start position (seed)
* @param y y coordinate of the start position (seed)
* @param fill_color fill color of the area
* @param bg_color background color of the area
*/
void lv_canvas_flood_fill(lv_obj_t * canvas, lv_coord_t x, lv_coord_t y, lv_color_t fill_color, lv_color_t bg_color);
/**********************
* MACROS
**********************/
#endif /*USE_LV_CANVAS*/
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /*LV_CANVAS_H*/