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config: tweak.surface-bit-depth: add 16f-bit

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This adds support for 16-bit floating point surfaces, using the new
PIXMAN_rgba_float16 image buffer type. This maps to
WL_SHM_ABGR161616F.
This commit is contained in:
Daniel Eklöf 2025-05-01 09:37:47 +02:00
parent 970e13db8d
commit 81e979b228
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GPG key ID: 5BBD4992C116573F
9 changed files with 64 additions and 10 deletions
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34
shm.c
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@ -1013,6 +1013,36 @@ shm_chain_new(struct wayland *wayl, bool scrollable, size_t pix_instances,
}
#endif
#if defined(HAVE_PIXMAN_RGBA_FLOAT16)
static bool have_logged_16f_fallback = false;
if (desired_bit_depth == SHM_BITS_16F ||
(desired_bit_depth == SHM_BITS_16 &&
pixman_fmt_with_alpha == PIXMAN_a8r8g8b8))
{
if (wayl->shm_have_abgr161616f && wayl->shm_have_xbgr161616f) {
pixman_fmt_without_alpha = PIXMAN_rgba_float16;
shm_fmt_without_alpha = WL_SHM_FORMAT_XBGR16161616F;
pixman_fmt_with_alpha = PIXMAN_rgba_float16;
shm_fmt_with_alpha = WL_SHM_FORMAT_ABGR16161616F;
if (!have_logged) {
have_logged = true;
LOG_INFO("using 16-bit (float) BGR surfaces");
}
} else {
if (!have_logged_16f_fallback) {
have_logged_16f_fallback = true;
LOG_WARN(
"16f-bit surfaces requested, but compositor does not "
"implement ABGR161616F+XBGR161616F");
}
}
}
#endif
if (desired_bit_depth >= SHM_BITS_10 &&
pixman_fmt_with_alpha == PIXMAN_a8r8g8b8)
{
@ -1101,6 +1131,10 @@ shm_chain_bit_depth(const struct buffer_chain *chain)
#if defined(HAVE_PIXMAN_RGBA_16)
: fmt == PIXMAN_a16b16g16r16
? SHM_BITS_16
#endif
#if defined(HAVE_PIXMAN_RGBA_FLOAT16)
: fmt == PIXMAN_rgba_float16
? SHM_BITS_16F
#endif
: SHM_BITS_10;
}