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

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This adds support for 16-bit (integer) surfaces. The corresponding
pixman type (PIXMAN_a16b16g16r16) was added in 0.46.0.

If the new 16-bit type is requested, but not supported by the
compositor, fallback to 16f-bit, and if that fails, 10-bit (and
finally 8-bit).
This commit is contained in:
Daniel Eklöf 2025-05-01 11:55:21 +02:00
parent 429a922723
commit 5dbf5ea89d
No known key found for this signature in database
GPG key ID: 5BBD4992C116573F
8 changed files with 60 additions and 16 deletions
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42
shm.c
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@ -986,10 +986,40 @@ shm_chain_new(struct wayland *wayl, bool scrollable, size_t pix_instances,
static bool have_logged = false;
static bool have_logged_10_fallback = false;
#if defined(HAVE_PIXMAN_RGBA_16)
static bool have_logged_16_fallback = false;
if (desired_bit_depth == SHM_BITS_16) {
if (wayl->shm_have_abgr161616 && wayl->shm_have_xbgr161616) {
pixman_fmt_without_alpha = PIXMAN_a16b16g16r16;
shm_fmt_without_alpha = WL_SHM_FORMAT_XBGR16161616;
pixman_fmt_without_alpha = PIXMAN_a16b16g16r16;
shm_fmt_with_alpha = WL_SHM_FORMAT_ABGR16161616;
if (!have_logged) {
have_logged = true;
LOG_INFO("using 16-bit BGR surfaces");
}
} else {
if (!have_logged_16_fallback) {
have_logged_16_fallback = true;
LOG_WARN(
"16-bit surfaces requested, but compositor does not "
"implement ABGR161616+XBGR161616");
}
}
}
#endif
#if defined(HAVE_PIXMAN_RGBA_FLOAT16)
static bool have_logged_16f_fallback = false;
if (desired_bit_depth == SHM_BITS_16F) {
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;
@ -1007,16 +1037,14 @@ shm_chain_new(struct wayland *wayl, bool scrollable, size_t pix_instances,
LOG_WARN(
"16f-bit surfaces requested, but compositor does not "
"implement ABGR161616F+XBGR161616F. Falling back to either "
"10- or 8-bit surfaces");
"implement ABGR161616F+XBGR161616F");
}
}
}
#endif
if (desired_bit_depth == SHM_BITS_10 ||
(desired_bit_depth == SHM_BITS_16F &&
pixman_fmt_with_alpha == PIXMAN_a8r8g8b8))
if (desired_bit_depth >= SHM_BITS_10 &&
pixman_fmt_with_alpha == PIXMAN_a8r8g8b8)
{
if (wayl->shm_have_argb2101010 && wayl->shm_have_xrgb2101010) {
pixman_fmt_without_alpha = PIXMAN_x2r10g10b10;
@ -1051,7 +1079,7 @@ shm_chain_new(struct wayland *wayl, bool scrollable, size_t pix_instances,
LOG_WARN(
"10-bit surfaces requested, but compositor does not "
"implement ARGB2101010+XRGB2101010, or "
"ABGR2101010+XBGR2101010. Falling back to 8-bit surfaces");
"ABGR2101010+XBGR2101010");
}
}
} else {