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console/win32: allocate shareable display surface

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Introduce qemu_win32_map_alloc() and qemu_win32_map_free() to allocate
shared memory mapping. The handle can be used to share the mapping with
another process.

Teach qemu_create_displaysurface() to allocate shared memory. Following
patches will introduce other places for shared memory allocation.

Other patches for -display dbus will share the memory when possible with
the client, to avoid expensive memory copy between the processes.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20230606115658.677673-10-marcandre.lureau@redhat.com>
This commit is contained in:
Marc-André Lureau
2023-06-06 15:56:46 +04:00
parent 439e0164cd
commit 09b4c198b8
7 changed files with 102 additions and 8 deletions
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ui/trace-events
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@@ -9,7 +9,7 @@ console_putchar_unhandled(int ch) "unhandled escape character '%c'"
console_txt_new(int w, int h) "%dx%d"
console_select(int nr) "%d"
console_refresh(int interval) "interval %d ms"
displaysurface_create(void *display_surface, int w, int h) "surface=%p, %dx%d"
displaysurface_create(int w, int h) "%dx%d"
displaysurface_create_from(void *display_surface, int w, int h, uint32_t format) "surface=%p, %dx%d, format 0x%x"
displaysurface_create_pixman(void *display_surface) "surface=%p"
displaysurface_free(void *display_surface) "surface=%p"