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