On 21/10/2015 13:16, Bas Nieuwenhuizen wrote:
On Wed, Oct 21, 2015 at 12:28 PM, Axel Davy <axel.d...@ens.fr> wrote:
+/* This flag indicates that in addition to being shared, the resource won't be
+ * read by any external process before we call flush_resource. This allows
+ * things like compressing the buffer when drawing, while uncompressing on
+ * flush_resource. The PIPE_BIND_SHARED must still be set with this flag.
+ * If PIPE_BIND_SHARED is specified but not
+ * PIPE_BIND_SHARED_FLUSH_RESOURCE, then the resource must be
+ * readable by external processes after any normal flush. */
I think these comments would allow the dri2 front buffer to have this
flag set as it is never shared with another process?
- Bas
The front buffer is read by the X server, which is another process.
In the case we have a fake front buffer, waitX/waitGL will trigger
read/writes with the X server real front buffer.
We could advertise the flag for fake front buffers if we were calling
flush_resource for waitX/waitGL,
but we don't do that.
Axel
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