mirror of
https://github.com/lvgl/lvgl.git
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85 lines
1.6 KiB
C
85 lines
1.6 KiB
C
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/**
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* @file circ.h
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*
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*/
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#ifndef CIRC_H
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#define CIRC_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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#include "misc_conf.h"
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#if USE_CIRC != 0
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#include "lv_area.h"
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#include <stddef.h>
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/*********************
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* DEFINES
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*********************/
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#define CIRC_OCT1_X(p) (p.x)
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#define CIRC_OCT1_Y(p) (p.y)
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#define CIRC_OCT2_X(p) (p.y)
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#define CIRC_OCT2_Y(p) (p.x)
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#define CIRC_OCT3_X(p) (-p.y)
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#define CIRC_OCT3_Y(p) (p.x)
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#define CIRC_OCT4_X(p) (-p.x)
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#define CIRC_OCT4_Y(p) (p.y)
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#define CIRC_OCT5_X(p) (-p.x)
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#define CIRC_OCT5_Y(p) (-p.y)
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#define CIRC_OCT6_X(p) (-p.y)
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#define CIRC_OCT6_Y(p) (-p.x)
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#define CIRC_OCT7_X(p) (p.y)
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#define CIRC_OCT7_Y(p) (-p.x)
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#define CIRC_OCT8_X(p) (p.x)
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#define CIRC_OCT8_Y(p) (-p.y)
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/**********************
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* TYPEDEFS
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**********************/
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/**********************
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* GLOBAL PROTOTYPES
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**********************/
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/**
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* Initialize the circle drawing
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* @param c pointer to a point. The coordinates will be calculated here
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* @param tmp point to a variable. It will store temporary data
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* @param radius radius of the circle
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*/
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void circ_init(point_t * c, cord_t * tmp, cord_t radius);
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/**
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* Test the circle drawing is ready or not
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* @param c same as in circ_init
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* @return true if the circle is not ready yet
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*/
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bool circ_cont(point_t * c);
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/**
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* Get the next point from the circle
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* @param c same as in circ_init. The next point stored here.
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* @param tmp same as in circ_init.
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*/
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void circ_next(point_t * c, cord_t * tmp);
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/**********************
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* MACROS
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**********************/
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#endif /*USE_CIRC*/
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#ifdef __cplusplus
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} /* extern "C" */
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#endif
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#endif
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