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box-drawing: rect(): implement using pixman

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Use pixman_image_fill_rectangles() to render rectangles. Duh!
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Daniel Eklöf 2021-05-05 15:03:04 +02:00
parent 155537c2de
commit 19fa1b30b8
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1 changed files with 15 additions and 7 deletions
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22
box-drawing.c
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@ -79,13 +79,21 @@ _vline(struct buf *buf, int y1, int y2, int x, int thick)
static void NOINLINE
_rect(struct buf *buf, int x1, int y1, int x2, int y2)
{
for (size_t row = max(y1, 0); row < min(y2, buf->height); row++) {
for (size_t col = max(x1, 0); col < max(min(x2, buf->width), 0); col++) {
size_t idx = col / 8;
size_t bit_no = col % 8;
buf->data[row * buf->stride + idx] |= 1 << bit_no;
}
}
x1 = min(max(x1, 0), buf->width);
y1 = min(max(y1, 0), buf->height);
x2 = min(max(x2, 0), buf->width);
y2 = min(max(y2, 0), buf->height);
int width = x2 - x1;
int height = y2 - y1;
assert(x1 + width <= buf->width);
assert(y1 + height <= buf->height);
pixman_rectangle16_t rect = {
.x = x1, .y = y1, .width = width, .height = height};
pixman_image_fill_rectangles(PIXMAN_OP_SRC, buf->pix, &white, 1, &rect);
}
#define rect(x1, y1, x2, y2) _rect(buf, x1, y1, x2, y2)