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config: tweak.surface-bit-depth: add support for 16f surfaces

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This adds supports for 16F surfaces (i.e. 16-bit floating point). We
haven't been able to support this until now, since there were no
corresponding pixman image type. Now there is.

Use the new 16f surfaces by default, when gamma-correct-blending=yes.
This commit is contained in:
Daniel Eklöf 2025-05-01 09:37:47 +02:00
parent 7354b94f73
commit 8faea42d9e
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GPG key ID: 5BBD4992C116573F
9 changed files with 88 additions and 25 deletions
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13
sixel.c
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@ -113,7 +113,18 @@ sixel_init(struct terminal *term, int p1, int p2, int p3)
term->sixel.linear_blending = wayl_do_linear_blending(term->wl, term->conf);
term->sixel.pixman_fmt = PIXMAN_a8r8g8b8;
if (term->conf->tweak.surface_bit_depth == SHM_BITS_10) {
/*
* Use higher-precision sixel surfaces if we're using
* higher-precision window surfaces.
*
* This is to a) get more accurate colors when doing gamma-correct
* blending, and b) use the same pixman format as the main
* surfaces, for (hopefully) better performance.
*
* For now, don't support 16f surfaces (too much sixel logic that
* assumes 32-bit pixels).
*/
if (shm_chain_bit_depth(term->render.chains.grid) >= SHM_BITS_10) {
if (term->wl->shm_have_argb2101010 && term->wl->shm_have_xrgb2101010) {
term->sixel.use_10bit = true;
term->sixel.pixman_fmt = PIXMAN_a2r10g10b10;