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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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48
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 +984,37 @@ 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_16f_fallback = false;
static bool have_logged_10_fallback = false;
if (desired_bit_depth == SHM_BITS_10) {
if (desired_bit_depth == SHM_BITS_16F) {
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. Falling back to either "
"10- or 8-bit surfaces");
}
}
}
if (desired_bit_depth == SHM_BITS_10 ||
(desired_bit_depth == SHM_BITS_16F &&
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;
@ -1010,8 +1042,8 @@ 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 "
@ -1063,7 +1095,9 @@ 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
: fmt == PIXMAN_rgba_float16
? SHM_BITS_16F
: SHM_BITS_10;
}