[Mesa-dev] [PATCH] mesa: Only mark textures as mipmap incomplete on MAX_LEVEL issues.

[Kenneth Graunke]

According to the OpenGL 3.2 Core Profile specification, section 3.8.12:

"For one-, two-, and three-dimensional and one-and two-dimensional array
 textures, a texture is mipmap complete if all of the following
 conditions hold true:
 - [...]
 - levelbase <= levelmax [...]

 Using the preceding definitions, a texture is complete unless any of
 the following conditions hold true:
 - [...]
 - The minification filter requires a mipmap (is neither NEAREST nor
   LINEAR), and the texture is not mipmap complete."

(This text also appears in all GL >= 3.2 specs and the ES 3.0 spec.)

>From this, we see that levelbase <= levelmax should only affect mipmap
completeness, not base-level completeness.

Prior versions of GL did not have the notion of mipmap completeness,
simply calling the texture incomplete in this case.  But I don't think
we really care.

Fixes es3conform's sgis_texture_lod_basic_completeness test.

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
---
 src/mesa/main/texobj.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/mesa/main/texobj.c b/src/mesa/main/texobj.c
index 799ce31..f40ab1a 100644
--- a/src/mesa/main/texobj.c
+++ b/src/mesa/main/texobj.c
@@ -469,7 +469,7 @@ _mesa_test_texobj_completeness( const struct gl_context *ctx,
    }
 
    if (t->MaxLevel < baseLevel) {
-      incomplete(t, BASE, "MAX_LEVEL (%d) < BASE_LEVEL (%d)",
+      incomplete(t, MIPMAP, "MAX_LEVEL (%d) < BASE_LEVEL (%d)",
 		 t->MaxLevel, baseLevel);
       return;
    }
@@ -577,7 +577,7 @@ _mesa_test_texobj_completeness( const struct gl_context *ctx,
       GLuint width, height, depth, face;
 
       if (minLevel > maxLevel) {
-         incomplete(t, BASE, "minLevel > maxLevel");
+         incomplete(t, MIPMAP, "minLevel > maxLevel");
          return;
       }
 
-- 
1.8.1