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extmod/modframebuf: Clip pixels drawn by line method.

This commit is contained in:
Damien George 2017-01-23 14:35:00 +11:00
parent 211244d1f3
commit e2d13d934a
1 changed files with 9 additions and 3 deletions
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12
extmod/modframebuf.c
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@ -302,9 +302,13 @@ STATIC mp_obj_t framebuf_line(size_t n_args, const mp_obj_t *args) {
mp_int_t e = 2 * dy - dx;
for (mp_int_t i = 0; i < dx; ++i) {
if (steep) {
setpixel(self, y1, x1, col);
if (0 <= y1 && y1 < self->width && 0 <= x1 && x1 < self->height) {
setpixel(self, y1, x1, col);
}
} else {
setpixel(self, x1, y1, col);
if (0 <= x1 && x1 < self->width && 0 <= y1 && y1 < self->height) {
setpixel(self, x1, y1, col);
}
}
while (e >= 0) {
y1 += sy;
@ -314,7 +318,9 @@ STATIC mp_obj_t framebuf_line(size_t n_args, const mp_obj_t *args) {
e += 2 * dy;
}
setpixel(self, x2, y2, col);
if (0 <= x2 && x2 < self->width && 0 <= y2 && y2 < self->height) {
setpixel(self, x2, y2, col);
}
return mp_const_none;
}