[Mesa-dev] [PATCH] mesa: Use immutable level count in FramebufferTexture error check.

[Kenneth Graunke]

This offers a more accurate bound.

Fixes KHR-GL45.geometry_shader.layered_fbo.fb_texture_invalid_level_number.
---
 src/mesa/main/fbobject.c | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/src/mesa/main/fbobject.c b/src/mesa/main/fbobject.c
index 0867ff70fa7..e11feda5f3c 100644
--- a/src/mesa/main/fbobject.c
+++ b/src/mesa/main/fbobject.c
@@ -3223,11 +3223,13 @@ check_layer(struct gl_context *ctx, GLenum target, GLint layer,
  * \return true if no errors, false if errors
  */
 static bool
-check_level(struct gl_context *ctx, GLenum target, GLint level,
-            const char *caller)
+check_level(struct gl_context *ctx, struct gl_texture_object *texObj,
+            GLenum target, GLint level, const char *caller)
 {
-   if ((level < 0) ||
-       (level >= _mesa_max_texture_levels(ctx, target))) {
+   const int max_levels = texObj->Immutable ? texObj->ImmutableLevels :
+                          _mesa_max_texture_levels(ctx, target);
+
+   if (level < 0 || level >= max_levels) {
       _mesa_error(ctx, GL_INVALID_VALUE,
                   "%s(invalid level %d)", caller, level);
       return false;
@@ -3393,7 +3395,7 @@ framebuffer_texture_with_dims(int dims, GLenum target,
       if ((dims == 3) && !check_layer(ctx, texObj->Target, layer, caller))
          return;
 
-      if (!check_level(ctx, textarget, level, caller))
+      if (!check_level(ctx, texObj, textarget, level, caller))
          return;
    }
 
@@ -3539,7 +3541,7 @@ frame_buffer_texture(GLuint framebuffer, GLenum target,
                return;
          }
 
-         if (!check_level(ctx, texObj->Target, level, func))
+         if (!check_level(ctx, texObj, texObj->Target, level, func))
             return;
       }
 
-- 
2.14.2