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drawEllipse: added a filled option

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Dongxu Li 2012-07-10 16:10:51 -04:00
parent 51f6f84111
commit 578e0db66e
2 changed files with 11 additions and 6 deletions
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7
glcd.c
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@ -319,16 +319,21 @@ void lcdDrawCircle(uint16_t x, uint16_t y, uint16_t radius, uint8_t filled, uint
} while(a <= b);
}
void lcdDrawEllipse(uint16_t x, uint16_t y, uint16_t a, uint16_t b, uint16_t color) {
void lcdDrawEllipse(uint16_t x, uint16_t y, uint16_t a, uint16_t b, uint16_t color, uint8_t filled) {
int dx = 0, dy = b; /* im I. Quadranten von links oben nach rechts unten */
long a2 = a*a, b2 = b*b;
long err = b2-(2*b-1)*a2, e2; /* Fehler im 1. Schritt */
do {
if(filled){
lcdDrawLine(x-dx,y+dy,x+dx,y+dy);
lcdDrawLine(x-dx,y-dy,x+dx,y-dy);
}else{
lcdDrawPixel(x+dx, y+dy, color); /* I. Quadrant */
lcdDrawPixel(x-dx, y+dy, color); /* II. Quadrant */
lcdDrawPixel(x-dx, y-dy, color); /* III. Quadrant */
lcdDrawPixel(x+dx, y-dy, color); /* IV. Quadrant */
}
e2 = 2*err;
if(e2 < (2*dx+1)*b2) {

2
glcd.h
View file

@ -67,7 +67,7 @@ void lcdDrawLine(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, uint16_t co
void lcdDrawRect(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, uint8_t filled, uint16_t color);
void lcdDrawRectString(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, const char* str, font_t font, uint16_t fontColor, uint16_t bkColor);
void lcdDrawCircle(uint16_t x, uint16_t y, uint16_t radius, uint8_t filled, uint16_t color);
void lcdDrawEllipse(uint16_t x, uint16_t y, uint16_t a, uint16_t b, uint16_t color);
void lcdDrawEllipse(uint16_t x, uint16_t y, uint16_t a, uint16_t b, uint16_t color, uint8_t filled);
/* Text Rendering Functions */
int lcdDrawChar(uint16_t cx, uint16_t cy, char c, font_t font, uint16_t color, uint16_t bkcolor, bool_t tpText);