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shm: align the stride to 256 bytes

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This is required for the compositor to import the buffer directly into
AMD hardware for zero-copy sampling.
This commit is contained in:
Julian Orth 2025-10-03 16:51:08 +02:00
parent 44a674edb8
commit c462bad08c
2 changed files with 2 additions and 2 deletions
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2
shm.c
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@ -13,7 +13,6 @@
#include <pixman.h> #include <pixman.h>
#include <fcft/stride.h>
#include <tllist.h> #include <tllist.h>
#define LOG_MODULE "shm" #define LOG_MODULE "shm"
@ -22,6 +21,7 @@
#include "debug.h" #include "debug.h"
#include "macros.h" #include "macros.h"
#include "xmalloc.h" #include "xmalloc.h"
#include "stride.h"
#if !defined(MAP_UNINITIALIZED) #if !defined(MAP_UNINITIALIZED)
#define MAP_UNINITIALIZED 0 #define MAP_UNINITIALIZED 0

2
stride.h
View file

@ -5,5 +5,5 @@
static inline int static inline int
stride_for_format_and_width(pixman_format_code_t format, int width) stride_for_format_and_width(pixman_format_code_t format, int width)
{ {
return (((PIXMAN_FORMAT_BPP(format) * width + 7) / 8 + 4 - 1) & -4); return (((PIXMAN_FORMAT_BPP(format) * width + 7) / 8 + 256 - 1) & -256);
} }