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Do not use additional padding space in covers temporary array

This commit is contained in:
Francesco Abbate 2020-06-05 17:36:08 +02:00
parent ad8cdf2b92
commit 7b541b7de8
1 changed files with 2 additions and 3 deletions
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5
lib/font_renderer/font_renderer.cpp
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@ -145,11 +145,10 @@ static void glyph_lut_convolution(agg::rendering_buffer ren_buf, agg::lcd_distri
const int x0 = gli.x0, y0 = gli.y0, x1 = gli.x1, y1 = gli.y1;
const int len = (x1 - x0) * subpixel;
const int height = ren_buf.height();
memset(covers_buf, 0, len + 2 * subpixel);
for (int y = y0; y < y1; y++) {
// FIXME: clarify why we do not use height - 1 below.
agg::int8u *covers = ren_buf.row_ptr(height - y) + x0 * subpixel;
memcpy(covers_buf + subpixel, covers, len);
memcpy(covers_buf, covers, len);
#if 0
if (len >= 24) {
debug_print_covers("BUF ", covers_buf, 0, len + 2 * subpixel, 0);
@ -159,7 +158,7 @@ static void glyph_lut_convolution(agg::rendering_buffer ren_buf, agg::lcd_distri
for (int x = x0 - 1; x < x1 + 1; x++) {
for (int i = 0; i < subpixel; i++) {
const int cx = (x - x0) * subpixel + i;
covers[cx] = lcd_lut.convolution(covers_buf + subpixel, cx, 0, len - 1);
covers[cx] = lcd_lut.convolution(covers, cx, 0, len - 1);
}
}
#if 0