mesa: short-circuit no-change in _mesa_DepthRange()

2009-08-11 15:46:46 -06:00
parent ace98f09e6
commit b9f67df6e7
1 changed files with 4 additions and 0 deletions
@@ -120,6 +120,10 @@ _mesa_DepthRange(GLclampd nearval, GLclampd farval)
   if (MESA_VERBOSE&VERBOSE_API)
      _mesa_debug(ctx, "glDepthRange %f %f\n", nearval, farval);

+   if (ctx->Viewport.Near == nearval &&
+       ctx->Viewport.Far == farval)
+      return;
+
   ctx->Viewport.Near = (GLfloat) CLAMP(nearval, 0.0, 1.0);
   ctx->Viewport.Far = (GLfloat) CLAMP(farval, 0.0, 1.0);
   ctx->NewState |= _NEW_VIEWPORT;