glthread: Fix use of alloca() without #include "c99_alloca.h"

[mesa.git] / src / mesa / main / texobj.h

diff --git a/src/mesa/main/texobj.h b/src/mesa/main/texobj.h
index 19f715159a294184714f7c1938f0dc6bd8145dda..91901617c683e77c4fcde1fd2f6ab644d3da4a65 100644 (file)
--- a/src/mesa/main/texobj.h
+++ b/src/mesa/main/texobj.h
@@ -122,24 +122,52 @@ _mesa_unlock_texture(struct gl_context *ctx, struct gl_texture_object *texObj)
 /** 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)
+                          const struct gl_sampler_object *sampler,
+                          bool linear_as_nearest_for_int_tex)
 {
+   struct gl_texture_image *img = texObj->Image[0][texObj->BaseLevel];
+   bool isMultisample = img && img->NumSamples >= 2;
+
    /*
     * According to ARB_stencil_texturing, NEAREST_MIPMAP_NEAREST would
     * be forbidden, however it is allowed per GL 4.5 rules, allow it
     * even without GL 4.5 since it was a spec mistake.
     */
-   if ((texObj->_IsIntegerFormat ||
+   /* Section 8.17 (texture completeness) of the OpenGL 4.6 core profile spec:
+    *
+    *  "The texture is not multisample; either the magnification filter is not
+    *  NEAREST, or the minification filter is neither NEAREST nor NEAREST_-
+    *  MIPMAP_NEAREST; and any of
+    *  – The internal format of the texture is integer.
+    *  – The internal format is STENCIL_INDEX.
+    *  – The internal format is DEPTH_STENCIL, and the value of DEPTH_-
+    *    STENCIL_TEXTURE_MODE for the texture is STENCIL_INDEX.""
+    */
+   if (!isMultisample &&
+       (texObj->_IsIntegerFormat ||
         (texObj->StencilSampling &&
-         texObj->Image[0][texObj->BaseLevel]->_BaseFormat == GL_DEPTH_STENCIL)) &&
+         img->_BaseFormat == GL_DEPTH_STENCIL)) &&
        (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 the format is integer, only nearest filtering is allowed,
+       * but some applications (eg: Grid Autosport) uses the default
+       * filtering values.
+       */
+      if (texObj->_IsIntegerFormat &&
+          linear_as_nearest_for_int_tex) {
+         /* Skip return */
+      } else {
+         return GL_FALSE;
+      }
    }
 
-   if (_mesa_is_mipmap_filter(sampler))
+   /* Section 8.17 (texture completeness) of the OpenGL 4.6 core profile spec:
+    *
+    *  "The minification filter requires a mipmap (is neither NEAREST nor LINEAR),
+    *  the texture is not multisample, and the texture is not mipmap complete.""
+    */
+   if (!isMultisample &&_mesa_is_mipmap_filter(sampler))
       return texObj->_MipmapComplete;
    else
       return texObj->_BaseComplete;