llvmpipe: added scene functions for texture reference counting

When a texture is used in the scene we add it to a list of texture
references.  The lp_scene_is_textured_referenced() function tells
us if a texture is referenced by the scene.

1 files changed, 16 insertions, 0 deletions

diff --git a/src/gallium/drivers/llvmpipe/lp_scene.h b/src/gallium/drivers/llvmpipe/lp_scene.h
index 4b6527d67c7..86facf8eac2 100644
--- a/src/gallium/drivers/llvmpipe/lp_scene.h
+++ b/src/gallium/drivers/llvmpipe/lp_scene.h
@@ -97,6 +97,13 @@ struct data_block_list {
 };
 
 
+/** List of texture references */
+struct texture_ref {
+   struct pipe_texture *texture;
+   struct texture_ref *prev, *next;  /**< linked list w/ u_simple_list.h */
+};
+
+
 /**
  * All bins and bin data are contained here.
  * Per-bin data goes into the 'tile' bins.
@@ -112,6 +119,9 @@ struct lp_scene {
    /** the framebuffer to render the scene into */
    struct pipe_framebuffer_state fb;
 
+   /** list of textures referenced by the scene commands */
+   struct texture_ref textures;
+
    boolean write_depth;
 
    /**
@@ -150,6 +160,12 @@ unsigned lp_scene_data_size( const struct lp_scene *scene );
 
 unsigned lp_scene_bin_size( const struct lp_scene *scene, unsigned x, unsigned y );
 
+void lp_scene_texture_reference( struct lp_scene *scene,
+                                 struct pipe_texture *texture );
+
+boolean lp_scene_is_textured_referenced( const struct lp_scene *scene,
+                                         const struct pipe_texture *texture );
+
 
 /**
  * Allocate space for a command/data in the bin's data buffer.