Per the spec, only nearest filtering is supported for integer textures.
Otherwise, the texture is incomplete.
---
src/mesa/main/mtypes.h | 1 +
src/mesa/main/texobj.c | 6 ++++++
src/mesa/main/texobj.h | 8 ++++++++
3 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/src/mesa/main/mtypes.h b/src/mesa/main/mtypes.h
index c6e5b94..a3827d4 100644
--- a/src/mesa/main/mtypes.h
+++ b/src/mesa/main/mtypes.h
@@ -1318,6 +1318,7 @@ struct gl_texture_object
GLboolean GenerateMipmap; /**< GL_SGIS_generate_mipmap */
GLboolean _BaseComplete; /**< Is the base texture level valid? */
GLboolean _MipmapComplete; /**< Is the whole mipmap valid? */
+ GLboolean _IsIntegerFormat; /**< Does the texture store integer values? */
GLboolean _RenderToTexture; /**< Any rendering to this texture? */
GLboolean Purgeable; /**< Is the buffer purgeable under memory
pressure? */
GLboolean Immutable; /**< GL_ARB_texture_storage */
diff --git a/src/mesa/main/texobj.c b/src/mesa/main/texobj.c
index 5419cd3..2be95b0 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).
*/
diff --git a/src/mesa/main/texobj.h b/src/mesa/main/texobj.h
index 850091e..c020b90 100644
--- a/src/mesa/main/texobj.h
+++ b/src/mesa/main/texobj.h
@@ -83,6 +83,14 @@ static inline GLboolean
_mesa_is_texture_complete(const struct gl_texture_object *texObj,
const struct gl_sampler_object *sampler)
{
+ if (texObj->_IsIntegerFormat &&
+ (sampler->MagFilter != GL_NEAREST ||
+ (sampler->MinFilter != GL_NEAREST &&
+ sampler->MinFilter != GL_NEAREST_MIPMAP_NEAREST))) {
+ /* If the format is integer, only nearest filtering is allowed */
+ return GL_FALSE;
+ }
+
if (_mesa_is_mipmap_filter(sampler))
return texObj->_MipmapComplete;
else
--
1.7.3.4
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