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cleanups

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This commit is contained in:
Tectu 2012-06-17 04:29:35 +02:00
parent 096e6c4ed9
commit 07d992ea1d
1 changed files with 18 additions and 18 deletions
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26
glcd.c
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@ -71,18 +71,18 @@ static void lcdWriteStream(uint16_t *buffer, uint16_t size) {
lld_lcdWriteStream(buffer, size);
}
void lcdDrawLine(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint16_t color) {
void lcdDrawLine(uint16_t x0, uint16_t y0, uint16_t x1, uint16_t y1, uint16_t color) {
int16_t dy, dx;
int16_t addx = 1, addy = 1;
int16_t P, diff;
int16_t i = 0;
dx = abs((int16_t)(x2 - x1));
dy = abs((int16_t)(y2 - y1));
dx = abs((int16_t)(x1 - x0));
dy = abs((int16_t)(y1 - y0));
if(x1 > x2)
if(x0 > x1)
addx = -1;
if(y1 > y2)
if(y0 > y1)
addy = -1;
if(dx >= dy) {
@ -91,14 +91,14 @@ void lcdDrawLine(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint16_t co
diff = P - dx;
for(; i<=dx; ++i) {
lcdDrawPixel(x1, y1, color);
lcdDrawPixel(x0, y0, color);
if(P < 0) {
P += dy;
x1 += addx;
x0 += addx;
} else {
P += diff;
x1 += addx;
y1 += addy;
x0 += addx;
y0 += addy;
}
}
} else {
@ -107,14 +107,14 @@ void lcdDrawLine(uint16_t x1, uint16_t y1, uint16_t x2, uint16_t y2, uint16_t co
diff = P - dy;
for(; i<=dy; ++i) {
lcdDrawPixel(x1, y1, color);
lcdDrawPixel(x0, y0, color);
if(P < 0) {
P += dx;
y1 += addy;
y0 += addy;
} else {
P += diff;
x1 += addx;
y1 += addy;
x0 += addx;
y0 += addy;
}
}
}