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added _ssd1306_circle function

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nopnop2002 2024-06-29 06:58:05 +09:00
parent 37977a6ebe
commit 9d45b006a8
2 changed files with 22 additions and 0 deletions
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21
components/ssd1306/ssd1306.c
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@ -528,6 +528,27 @@ void _ssd1306_line(SSD1306_t * dev, int x1, int y1, int x2, int y2, bool invert
}
}
// Draw circle
void _ssd1306_circle(SSD1306_t * dev, int x0, int y0, int r, bool invert)
{
int x;
int y;
int err;
int old_err;
x=0;
y=-r;
err=2-2*r;
do{
_ssd1306_pixel(dev, x0-x, y0+y, invert);
_ssd1306_pixel(dev, x0-y, y0-x, invert);
_ssd1306_pixel(dev, x0+x, y0-y, invert);
_ssd1306_pixel(dev, x0+y, y0+x, invert);
if ((old_err=err)<=x) err+=++x*2+1;
if (old_err>y || err>x) err+=++y*2+1;
} while(y<0);
}
void ssd1306_invert(uint8_t *buf, size_t blen)
{
uint8_t wk;

1
components/ssd1306/ssd1306.h
View File

@ -126,6 +126,7 @@ void ssd1306_wrap_arround(SSD1306_t * dev, ssd1306_scroll_type_t scroll, int sta
void ssd1306_bitmaps(SSD1306_t * dev, int xpos, int ypos, uint8_t * bitmap, int width, int height, bool invert);
void _ssd1306_pixel(SSD1306_t * dev, int xpos, int ypos, bool invert);
void _ssd1306_line(SSD1306_t * dev, int x1, int y1, int x2, int y2, bool invert);
void _ssd1306_circle(SSD1306_t * dev, int x0, int y0, int r, bool invert);
void ssd1306_invert(uint8_t *buf, size_t blen);
void ssd1306_flip(uint8_t *buf, size_t blen);
uint8_t ssd1306_copy_bit(uint8_t src, int srcBits, uint8_t dst, int dstBits);