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

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This adds supports for 16-bit surfaces, using the new
PIXMAN_a16b16g16r16 buffer format. This maps to
WL_SHM_FORMAT_ABGR16161616 (little-endian).

Use the new 16-bit 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 970e13db8d
No known key found for this signature in database
GPG key ID: 5BBD4992C116573F
10 changed files with 101 additions and 25 deletions
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53
shm.c
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@ -338,7 +338,10 @@ get_new_buffers(struct buffer_chain *chain, size_t count,
size_t total_size = 0;
for (size_t i = 0; i < count; i++) {
stride[i] = stride_for_format_and_width(
with_alpha ? PIXMAN_a8r8g8b8 : PIXMAN_x8r8g8b8, widths[i]);
with_alpha
? chain->pixman_fmt_with_alpha
: chain->pixman_fmt_without_alpha,
widths[i]);
sizes[i] = stride[i] * heights[i];
total_size += sizes[i];
}
@ -981,8 +984,38 @@ shm_chain_new(struct wayland *wayl, bool scrollable, size_t pix_instances,
enum wl_shm_format shm_fmt_with_alpha = WL_SHM_FORMAT_ARGB8888;
static bool have_logged = false;
static bool have_logged_10_fallback = false;
if (desired_bit_depth == SHM_BITS_10) {
#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 (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;
shm_fmt_without_alpha = WL_SHM_FORMAT_XRGB2101010;
@ -1010,13 +1043,13 @@ shm_chain_new(struct wayland *wayl, bool scrollable, size_t pix_instances,
}
else {
if (!have_logged) {
have_logged = true;
if (!have_logged_10_fallback) {
have_logged_10_fallback = true;
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 {
@ -1063,7 +1096,11 @@ shm_chain_bit_depth(const struct buffer_chain *chain)
{
const pixman_format_code_t fmt = chain->pixman_fmt_with_alpha;
return (fmt == PIXMAN_a2r10g10b10 || fmt == PIXMAN_a2b10g10r10)
? SHM_BITS_10
: SHM_BITS_8;
return fmt == PIXMAN_a8r8g8b8
? SHM_BITS_8
#if defined(HAVE_PIXMAN_RGBA_16)
: fmt == PIXMAN_a16b16g16r16
? SHM_BITS_16
#endif
: SHM_BITS_10;
}