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, 9 insertions, 5 deletions

diff --git a/src/mesa/drivers/dri/radeon/radeon_lock.c b/src/mesa/drivers/dri/radeon/radeon_lock.c
index ba87271f2f..e6ab6af456 100644
--- a/src/mesa/drivers/dri/radeon/radeon_lock.c
+++ b/src/mesa/drivers/dri/radeon/radeon_lock.c
@@ -71,7 +71,8 @@ radeonUpdatePageFlipping( radeonContextPtr rmesa )
  */
 void radeonGetLock( radeonContextPtr rmesa, GLuint flags )
 {
-   __DRIdrawablePrivate *dPriv = rmesa->dri.drawable;
+   __DRIdrawablePrivate *const drawable = rmesa->dri.drawable;
+   __DRIdrawablePrivate *const readable = rmesa->dri.readable;
    __DRIscreenPrivate *sPriv = rmesa->dri.screen;
    drm_radeon_sarea_t *sarea = rmesa->sarea;
 
@@ -85,14 +86,17 @@ void radeonGetLock( radeonContextPtr rmesa, GLuint flags )
     * Since the hardware state depends on having the latest drawable
     * clip rects, all state checking must be done _after_ this call.
     */
-   DRI_VALIDATE_DRAWABLE_INFO( sPriv, dPriv );
+   DRI_VALIDATE_DRAWABLE_INFO( sPriv, drawable );
+   if (drawable != readable) {
+      DRI_VALIDATE_DRAWABLE_INFO( sPriv, readable );
+   }
 
-   if ( rmesa->lastStamp != dPriv->lastStamp ) {
+   if ( rmesa->lastStamp != drawable->lastStamp ) {
       radeonUpdatePageFlipping( rmesa );
       radeonSetCliprects( rmesa );
       radeonUpdateViewportOffset( rmesa->glCtx );
-      driUpdateFramebufferSize(rmesa->glCtx, dPriv);
-      rmesa->lastStamp = dPriv->lastStamp;
+      driUpdateFramebufferSize(rmesa->glCtx, drawable);
+      rmesa->lastStamp = drawable->lastStamp;
    }
 
    RADEON_STATECHANGE( rmesa, ctx );