Squashed commit of gallium-no-texture-blanket

commit f90b3f01af82b9522067b1824e21709a6fb2d3af
Author: Keith Whitwell <keithw@vmware.com>
Date:   Mon Mar 8 14:39:44 2010 +0000

    gallium: remove p_screen::surface_buffer_create

    This isn't very useful without texture_blanket(), which has also been
    removed.

    Note that this function hasn't been removed from the old pipe_winsys
    (u_simple_screen) still used internally by some drivers (eg softpipe).

commit 6c462de39a4b9980a5f034a95e580efdfcb8173b
Author: Keith Whitwell <keithw@vmware.com>
Date:   Mon Mar 8 14:27:40 2010 +0000

    egl/x11: disable texture_blanket usage

commit b42da9160df9f47224e5b3291b972f41767aa6e5
Merge: 4be2436 3ca9336
Author: Keith Whitwell <keithw@vmware.com>
Date:   Mon Mar 8 14:27:24 2010 +0000

    Merge commit 'origin/master' into gallium-no-texture-blanket

    Conflicts:
    	src/gallium/drivers/svga/svga_screen_texture.c

commit 4be2436316929e3dfc55bc34d810920c06556b66
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Mar 4 14:59:26 2010 +0000

    gallium: remove texture blanket call

    No longer needed, except for nouveau and egl/xll/native_ximage.c.

    Fix for nouveau is to keep the call, but move it to an internal
    function within nouveau.

    Fix for that egl/x11 relies on gallium-sw-api branch or its successor.

commit 69b6764330367d63c237d0bde9fb96435d0e0257
Author: Keith Whitwell <keithw@vmware.com>
Date:   Thu Mar 4 13:35:16 2010 +0000

    drm_api: wrap comment

1 files changed, 12 insertions, 0 deletions

diff --git a/src/gallium/drivers/nouveau/nouveau_screen.h b/src/gallium/drivers/nouveau/nouveau_screen.h
index a7927d88dfc..f4a7a2bc234 100644
--- a/src/gallium/drivers/nouveau/nouveau_screen.h
+++ b/src/gallium/drivers/nouveau/nouveau_screen.h
@@ -6,6 +6,18 @@ struct nouveau_screen {
 	struct nouveau_device *device;
 	struct nouveau_channel *channel;
 
+        /**
+         * Create a new texture object, using the given template info, but on top of
+         * existing memory.
+         * 
+         * It is assumed that the buffer data is layed out according to the expected
+         * by the hardware. NULL will be returned if any inconsistency is found.  
+         */
+        struct pipe_texture * (*texture_blanket)(struct pipe_screen *,
+                                                 const struct pipe_texture *templat,
+                                                 const unsigned *stride,
+                                                 struct pipe_buffer *buffer);
+
 	int (*pre_pipebuffer_map_callback) (struct pipe_screen *pscreen,
 		struct pipe_buffer *pb, unsigned usage);
 };