mesa: rework texture completeness testing

Instead of gl_texture_object::_Complete there are now two fields:
_BaseComplete and _MipmapComplete.  The former indicates whether the base
texture level is valid.  The later indicates whether the whole mipmap is
valid.

With sampler objects, a single texture can appear to be both complete and
incomplete at the same time.  See the GL_ARB_sampler_objects spec for more
details.  To implement this we now check if the texture is complete with
respect to a sampler state.

Another benefit of this is we no longer need to invalidate a texture's
completeness state when we change the minification/magnification filters
with glTexParameter().

Reviewed-by: José Fonseca <jfonseca@vmware.com>
Reviewed-by: Eric Anholt <eric@anholt.net>

1 files changed, 13 insertions, 0 deletions

diff --git a/src/mesa/main/texobj.h b/src/mesa/main/texobj.h
index 03dfbe3..850091e 100644
--- a/src/mesa/main/texobj.h
+++ b/src/mesa/main/texobj.h
@@ -35,6 +35,7 @@
 #include "compiler.h"
 #include "glheader.h"
 #include "mtypes.h"
+#include "samplerobj.h"
 
 
 /**
@@ -77,6 +78,18 @@ _mesa_reference_texobj(struct gl_texture_object **ptr,
 }
 
 
+/** Is the texture "complete" with respect to the given sampler state? */
+static inline GLboolean
+_mesa_is_texture_complete(const struct gl_texture_object *texObj,
+                          const struct gl_sampler_object *sampler)
+{
+   if (_mesa_is_mipmap_filter(sampler))
+      return texObj->_MipmapComplete;
+   else
+      return texObj->_BaseComplete;
+}
+
+
 extern void
 _mesa_test_texobj_completeness( const struct gl_context *ctx,
                                 struct gl_texture_object *obj );