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config: tweak.surface-bit-depth now defaults to 'auto'

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When set to 'auto', use 10-bit surfaces if gamma-correct blending is
enabled, and 8-bit surfaces otherwise.

Note that we may still fallback to 8-bit surfaces (without disabling
gamma-correct blending) if the compositor does not support 10-bit
surfaces.

Closes #2082
This commit is contained in:
Daniel Eklöf 2025-05-01 08:34:49 +02:00
parent b07ce56321
commit e5a0755451
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GPG key ID: 5BBD4992C116573F
13 changed files with 105 additions and 71 deletions
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15
shm.c
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@ -972,7 +972,7 @@ shm_unref(struct buffer *_buf)
struct buffer_chain *
shm_chain_new(struct wayland *wayl, bool scrollable, size_t pix_instances,
bool ten_bit_if_capable)
enum shm_bit_depth desired_bit_depth)
{
pixman_format_code_t pixman_fmt_without_alpha = PIXMAN_x8r8g8b8;
enum wl_shm_format shm_fmt_without_alpha = WL_SHM_FORMAT_XRGB8888;
@ -982,8 +982,7 @@ shm_chain_new(struct wayland *wayl, bool scrollable, size_t pix_instances,
static bool have_logged = false;
if (ten_bit_if_capable) {
if (desired_bit_depth == SHM_BITS_10) {
if (wayl->shm_have_argb2101010 && wayl->shm_have_xrgb2101010) {
pixman_fmt_without_alpha = PIXMAN_x2r10g10b10;
shm_fmt_without_alpha = WL_SHM_FORMAT_XRGB2101010;
@ -1058,3 +1057,13 @@ shm_chain_free(struct buffer_chain *chain)
free(chain);
}
enum shm_bit_depth
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;
}