meta: Don't save and restore fog state when there is no fog state

I wonder if the better solution is to have _mesa_meta_GenerateMipmap not
use MESA_META_ALL for the GLSL path.  Even on compatibility profiles
there is no reason to save and restore fog on this path.

NOTE: This is a candidate for the 9.0 branch.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Tested-by: Lu Hua <huax.lu@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=54295

diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c
index 4b448fed51b134b54de4ba56058c39043251dbf7..36672a71d73e389946f9f832fdfc743064091702 100644 (file)
--- a/src/mesa/drivers/common/meta.c
+++ b/src/mesa/drivers/common/meta.c
@@ -538,7 +538,9 @@ _mesa_meta_begin(struct gl_context *ctx, GLbitfield state)
          _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_FALSE);
    }
 
-   if (state & MESA_META_FOG) {
+   if ((state & MESA_META_FOG)
+       && ctx->API != API_OPENGL_CORE
+       && ctx->API != API_OPENGLES2) {
       save->Fog = ctx->Fog.Enabled;
       if (ctx->Fog.Enabled)
          _mesa_set_enable(ctx, GL_FOG, GL_FALSE);
@@ -856,7 +858,9 @@ _mesa_meta_end(struct gl_context *ctx)
       _mesa_DepthMask(save->Depth.Mask);
    }
 
-   if (state & MESA_META_FOG) {
+   if ((state & MESA_META_FOG)
+       && ctx->API != API_OPENGL_CORE
+       && ctx->API != API_OPENGLES2) {
       _mesa_set_enable(ctx, GL_FOG, save->Fog);
    }