Mesa (master): virgl: document potentially failing blit
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Wed Apr 17 07:41:24 UTC 2019
Module: Mesa
Branch: master
Commit: ce1761edabf8c27f3e76d6790b0876930ef390dc
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=ce1761edabf8c27f3e76d6790b0876930ef390dc
Author: Erik Faye-Lund <erik.faye-lund at collabora.com>
Date: Tue Apr 9 14:25:51 2019 +0200
virgl: document potentially failing blit
This blit can fail, but this is not new; in the old version we
didn't even try to blit in this case. So let's just document the
limitation for now, and leave this for another day.
Signed-off-by: Erik Faye-Lund <erik.faye-lund at collabora.com>
Reviewed-by: Gurchetan Singh <gurchetansingh at chromium.org>
---
src/gallium/drivers/virgl/virgl_texture.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/src/gallium/drivers/virgl/virgl_texture.c b/src/gallium/drivers/virgl/virgl_texture.c
index bbda3f2406e..f0a2465021c 100644
--- a/src/gallium/drivers/virgl/virgl_texture.c
+++ b/src/gallium/drivers/virgl/virgl_texture.c
@@ -298,6 +298,12 @@ static void virgl_texture_transfer_unmap(struct pipe_context *ctx,
flush_data(ctx, virgl_transfer(trans->resolve_transfer),
&trans->resolve_transfer->box);
+ /* FINISHME: In case the destination format isn't renderable here, the
+ * blit here will currently fail. This could for instance happen if the
+ * mapped resource is of a compressed format, and it's mapped with both
+ * read and write usage.
+ */
+
virgl_copy_region_with_blit(ctx,
trans->base.resource, trans->base.level,
&transfer->box,
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