st/mesa: skip texture validation logic when nothing has changed

Based on the same logic in the i965 driver 2f225f61451abd51 and
16060c5adcd4.

perf reports st_finalize_texture() going from 0.60% -> 0.16% with
this change when running the Xonotic benchmark from PTS.

Reviewed-by: Marek Olšák <[email protected]>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/mesa/state_tracker/st_texture.h b/src/mesa/state_tracker/st_texture.h
index 1b4d1a3ea23..c02d13598ba 100644
--- a/src/mesa/state_tracker/st_texture.h
+++ b/src/mesa/state_tracker/st_texture.h
@@ -84,6 +84,9 @@ struct st_texture_object
     */
    GLuint lastLevel;
 
+   unsigned int validated_first_level;
+   unsigned int validated_last_level;
+
    /* On validation any active images held in main memory or in other
     * textures will be copied to this texture and the old storage freed.
     */
@@ -121,6 +124,12 @@ struct st_texture_object
    unsigned prev_glsl_version;
    /** The value of the sampler's sRGBDecode state at the previous validation */
    GLenum prev_sRGBDecode;
+
+    /**
+     * Set when the texture images of this texture object might not all be in
+     * the pipe_resource *pt above.
+     */
+    bool needs_validation;
 };