mesa: add integer texture completeness check

Per the spec, only nearest filtering is supported for integer textures.
Otherwise, the texture is incomplete.

Reviewed-by: José Fonseca <[email protected]>
Reviewed-by: Eric Anholt <[email protected]>

1 files changed, 6 insertions, 0 deletions

diff --git a/src/mesa/main/texobj.c b/src/mesa/main/texobj.c
index da27d9236e9..d641e40ad72 100644
--- a/src/mesa/main/texobj.c
+++ b/src/mesa/main/texobj.c
@@ -478,6 +478,12 @@ _mesa_test_texobj_completeness( const struct gl_context *ctx,
       return;
    }
 
+   /* Check if the texture values are integer */
+   {
+      GLenum datatype = _mesa_get_format_datatype(baseImage->TexFormat);
+      t->_IsIntegerFormat = datatype == GL_INT || datatype == GL_UNSIGNED_INT;
+   }
+
    /* Compute _MaxLevel (the maximum mipmap level we'll sample from given the
     * mipmap image sizes and GL_TEXTURE_MAX_LEVEL state).
     */