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sixel: avoid multiplication inside the inner sixel emitter loop

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Daniel Eklöf 2021-03-06 19:44:26 +01:00
parent 6658740982
commit 7603ae5dc3
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1 changed files with 6 additions and 6 deletions
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sixel.c
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@ -921,13 +921,13 @@ sixel_add(struct terminal *term, uint32_t color, uint8_t sixel)
return; return;
} }
size_t ofs = term->sixel.pos.row * term->sixel.image.width;
ofs += term->sixel.pos.col;
for (int i = 0; i < 6; i++, sixel >>= 1) { for (int i = 0; i < 6; i++, sixel >>= 1) {
if (sixel & 1) { if (sixel & 1)
size_t pixel_row = term->sixel.pos.row + i; term->sixel.image.data[ofs] = color_with_alpha(term, color);
size_t stride = term->sixel.image.width; ofs += term->sixel.image.width;
size_t idx = pixel_row * stride + term->sixel.pos.col;
term->sixel.image.data[idx] = color_with_alpha(term, color);
}
} }
xassert(sixel == 0); xassert(sixel == 0);