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bitmaptools dither: Fix off-by-one error filling row data

This commit is contained in:
Jeff Epler 2021-11-24 09:15:17 -06:00
parent 6191696232
commit 9af76a2f03
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GPG Key ID: D5BF15AB975AB4DE
1 changed files with 3 additions and 3 deletions
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6
shared-module/bitmaptools/__init__.c
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@ -761,13 +761,13 @@ void common_hal_bitmaptools_dither(displayio_bitmap_t *dest_bitmap, displayio_bi
rows[1] = rows[2];
rows[2] = tmp;
fill_row(source_bitmap, swap, rows[2], y + 2, info->mx);
y++;
if (y == height) {
break;
}
fill_row(source_bitmap, swap, rows[2], y + 2, info->mx);
// Serpentine dither. Going right-to-left...
for (int x = width; x--;) {
int16_t pixel_in = rows[0][x] + err;
@ -790,7 +790,7 @@ void common_hal_bitmaptools_dither(displayio_bitmap_t *dest_bitmap, displayio_bi
rows[1] = rows[2];
rows[2] = tmp;
fill_row(source_bitmap, swap, rows[2], y + 2, info->mx);
fill_row(source_bitmap, swap, rows[2], y + 3, info->mx);
}
displayio_area_t a = { 0, 0, width, height, NULL };