[Mesa-dev] [PATCH 01/14] i965: Don't tile 1D miptrees.

[Francisco Jerez]

It doesn't really improve locality of texture fetches, quite the
opposite it's a waste of memory bandwidth and space due to tile
alignment.
---
 src/mesa/drivers/dri/i965/intel_mipmap_tree.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
index 64752dd..311b204 100644
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
@@ -488,6 +488,10 @@ intel_miptree_choose_tiling(struct brw_context *brw,
        base_format == GL_DEPTH_STENCIL_EXT)
       return I915_TILING_Y;
 
+   if (mt->target == GL_TEXTURE_1D ||
+       mt->target == GL_TEXTURE_1D_ARRAY)
+      return I915_TILING_NONE;
+
    int minimum_pitch = mt->total_width * mt->cpp;
 
    /* If the width is much smaller than a tile, don't bother tiling. */
-- 
2.1.3