intel: Always allocate miptrees from level 0, not tObj->BaseLevel.

BaseLevel/MaxLevel are mostly used for two things: clamping texture
access for FBO rendering, and limiting the used mipmap levels when
incrementally loading textures.  By restricting our mipmap trees to
just the current BaseLevel/MaxLevel, we caused reallocation thrashing
in the common case, for a theoretical win if someone really did want
just levels 2..4 or whatever of their texture object.

Bug #30366

1 files changed, 8 insertions, 19 deletions

diff --git a/src/mesa/drivers/dri/intel/intel_tex_validate.c b/src/mesa/drivers/dri/intel/intel_tex_validate.c
index 4d257cc71d..f1c6239d3d 100644
--- a/src/mesa/drivers/dri/intel/intel_tex_validate.c
+++ b/src/mesa/drivers/dri/intel/intel_tex_validate.c
@@ -104,8 +104,7 @@ intel_finalize_mipmap_tree(struct intel_context *intel, GLuint unit)
     */
    if (firstImage->mt &&
        firstImage->mt != intelObj->mt &&
-       firstImage->mt->first_level <= tObj->BaseLevel &&
-       firstImage->mt->last_level >= intelObj->_MaxLevel) {
+       firstImage->mt->levels >= intelObj->_MaxLevel) {
 
       if (intelObj->mt)
          intel_miptree_release(intel, &intelObj->mt);
@@ -132,11 +131,10 @@ intel_finalize_mipmap_tree(struct intel_context *intel, GLuint unit)
    if (intelObj->mt &&
        (intelObj->mt->target != intelObj->base.Target ||
 	intelObj->mt->internal_format != firstImage->base.InternalFormat ||
-	intelObj->mt->first_level != tObj->BaseLevel ||
-	intelObj->mt->last_level != intelObj->_MaxLevel ||
-	intelObj->mt->width0 != firstImage->base.Width ||
-	intelObj->mt->height0 != firstImage->base.Height ||
-	intelObj->mt->depth0 != firstImage->base.Depth ||
+	intelObj->mt->levels <= intelObj->_MaxLevel ||
+	intelObj->mt->width0 != firstImage->mt->width0 ||
+	intelObj->mt->height0 != firstImage->mt->height0 ||
+	intelObj->mt->depth0 != firstImage->mt->depth0 ||
 	intelObj->mt->cpp != cpp ||
 	intelObj->mt->compressed != _mesa_is_format_compressed(firstImage->base.TexFormat))) {
       intel_miptree_release(intel, &intelObj->mt);
@@ -146,18 +144,9 @@ intel_finalize_mipmap_tree(struct intel_context *intel, GLuint unit)
    /* May need to create a new tree:
     */
    if (!intelObj->mt) {
-      intelObj->mt = intel_miptree_create(intel,
-                                          intelObj->base.Target,
-                                          firstImage->base._BaseFormat,
-                                          firstImage->base.InternalFormat,
-                                          tObj->BaseLevel,
-                                          intelObj->_MaxLevel,
-                                          firstImage->base.Width,
-                                          firstImage->base.Height,
-                                          firstImage->base.Depth,
-                                          cpp,
-                                          comp_byte,
-					  GL_TRUE);
+      intelObj->mt = intel_miptree_create_for_teximage(intel, intelObj,
+						       firstImage,
+						       GL_TRUE);
    }
 
    /* Pull in any images not in the object's tree: