1 files changed, 36 insertions, 0 deletions
diff --git a/src/mesa/pipe/softpipe/sp_texture.c b/src/mesa/pipe/softpipe/sp_texture.c
index 532bcfcc51d..d43a6996e98 100644
--- a/src/mesa/pipe/softpipe/sp_texture.c
+++ b/src/mesa/pipe/softpipe/sp_texture.c
@@ -130,3 +130,39 @@ softpipe_texture_release(struct pipe_context *pipe, struct pipe_texture **pt)
    }
    *pt = NULL;
 }
+
+
+/**
+ * Called via pipe->get_tex_surface()
+ */
+struct pipe_surface *
+softpipe_get_tex_surface(struct pipe_context *pipe,
+                         struct pipe_texture *pt,
+                         unsigned face, unsigned level, unsigned zslice)
+{
+   struct softpipe_texture *spt = softpipe_texture(pt);
+   struct pipe_surface *ps;
+
+   ps = pipe->winsys->surface_alloc(pipe->winsys);
+   if (ps) {
+      assert(ps->refcount);
+      assert(ps->winsys);
+      pipe->winsys->buffer_reference(pipe->winsys, &ps->buffer, spt->buffer);
+      ps->format = pt->format;
+      ps->cpp = pt->cpp;
+      ps->width = pt->width[level];
+      ps->height = pt->height[level];
+      ps->pitch = ps->width;
+      ps->offset = spt->level_offset[level];
+
+      if (pt->target == PIPE_TEXTURE_CUBE || pt->target == PIPE_TEXTURE_3D) {
+	 ps->offset += ((pt->target == PIPE_TEXTURE_CUBE) ? face : zslice) *
+		       (pt->compressed ? ps->height/4 : ps->height) *
+		       ps->width * ps->cpp;
+      } else {
+	 assert(face == 0);
+	 assert(zslice == 0);
+      }
+   }
+   return ps;
+}