Module: Mesa
Branch: master
Commit: 2b079485f6092051ebb7fec0e6210d6743926064
URL:
http://cgit.freedesktop.org/mesa/mesa/commit/?id=2b079485f6092051ebb7fec0e6210d6743926064
Author: Thomas Hellstrom <thellst...@vmware.com>
Date: Thu Feb 24 13:03:07 2011 +0100
st/egl: Add a helper to perform a copy swap on a resource surface
The copy swap can be used when we need to preserve the contents of
the back buffer or when there is no way to do native page-flipping.
Signed-off-by: Thomas Hellstrom <thellst...@vmware.com>
---
.../state_trackers/egl/common/native_helper.c | 41 ++++++++++++++++++++
.../state_trackers/egl/common/native_helper.h | 4 ++
2 files changed, 45 insertions(+), 0 deletions(-)
diff --git a/src/gallium/state_trackers/egl/common/native_helper.c
b/src/gallium/state_trackers/egl/common/native_helper.c
index a9d8f32..0f00c4d 100644
--- a/src/gallium/state_trackers/egl/common/native_helper.c
+++ b/src/gallium/state_trackers/egl/common/native_helper.c
@@ -225,3 +225,44 @@ resource_surface_present(struct resource_surface *rsurf,
return TRUE;
}
+
+/**
+ * Schedule a copy swap from the back to the front buffer using the
+ * native display's copy context.
+ */
+boolean
+resource_surface_copy_swap(struct resource_surface *rsurf,
+ struct native_display *ndpy)
+{
+ struct pipe_resource *ftex;
+ struct pipe_resource *btex;
+ struct pipe_context *pipe;
+ struct pipe_box src_box;
+ boolean ret = FALSE;
+
+ pipe = ndpy_get_copy_context(ndpy);
+ if (!pipe)
+ return FALSE;
+
+ ftex = resource_surface_get_single_resource(rsurf,
+ NATIVE_ATTACHMENT_FRONT_LEFT);
+ if (!ftex)
+ goto out_no_ftex;
+ btex = resource_surface_get_single_resource(rsurf,
+ NATIVE_ATTACHMENT_BACK_LEFT);
+ if (!btex)
+ goto out_no_btex;
+
+ u_box_origin_2d(ftex->width0, ftex->height0, &src_box);
+ pipe->resource_copy_region(pipe, ftex, 0, 0, 0, 0,
+ btex, 0, &src_box);
+ pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
+ ret = TRUE;
+
+ out_no_ftex:
+ pipe_resource_reference(&btex, NULL);
+ out_no_btex:
+ pipe_resource_reference(&ftex, NULL);
+
+ return ret;
+}
diff --git a/src/gallium/state_trackers/egl/common/native_helper.h
b/src/gallium/state_trackers/egl/common/native_helper.h
index 03995de..ad68273 100644
--- a/src/gallium/state_trackers/egl/common/native_helper.h
+++ b/src/gallium/state_trackers/egl/common/native_helper.h
@@ -74,3 +74,7 @@ boolean
resource_surface_present(struct resource_surface *rsurf,
enum native_attachment which,
void *winsys_drawable_handle);
+
+boolean
+resource_surface_copy_swap(struct resource_surface *rsurf,
+ struct native_display *ndpy);
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