Enable GLX_SGI_make_current_read for radeon.

Added code to track the drawable bound to the context for reading.  In
addition, when a drawable is initially bound (for reading or drawing)
or when the size of the drawable changes, update the size of the
framebuffer object that back the drawable (for software fallbacks).

Deprecate the old GetBufferSize interface.

Bump the driver date.

These changes were tested with wincopy on both direct rendering and
accelerated indirect rendering (AIGLX).

1 files changed, 10 insertions, 1 deletions

diff --git a/src/mesa/drivers/dri/radeon/radeon_context.h b/src/mesa/drivers/dri/radeon/radeon_context.h
index 9902e60c59..0a7c3b2f54 100644
--- a/src/mesa/drivers/dri/radeon/radeon_context.h
+++ b/src/mesa/drivers/dri/radeon/radeon_context.h
@@ -496,7 +496,16 @@ struct radeon_dma {
 struct radeon_dri_mirror {
    __DRIcontextPrivate	*context;	/* DRI context */
    __DRIscreenPrivate	*screen;	/* DRI screen */
-   __DRIdrawablePrivate	*drawable;	/* DRI drawable bound to this ctx */
+
+   /**
+    * DRI drawable bound to this context for drawing.
+    */
+   __DRIdrawablePrivate	*drawable;	
+
+   /**
+    * DRI drawable bound to this context for reading.
+    */
+   __DRIdrawablePrivate	*readable;
 
    drm_context_t hwContext;
    drm_hw_lock_t *hwLock;