Add GrPaint::*StageEnabled() and GrDrawState::stageEnabled() functions.

These wrap the question of "is this stage of the shader enabled?" so that
we can change the semantics - previously iff there was a texture, now
if there is a texture OR a GrCustomStage, soon (post-cl 6306097) iff there
is a GrCustomStage, which at that point will hold whatever texture is
necessary.

http://codereview.appspot.com/6306104/



git-svn-id: http://skia.googlecode.com/svn/trunk@4325 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 1 insertions, 7 deletions

diff --git a/src/gpu/GrDrawTarget.h b/src/gpu/GrDrawTarget.h
index 73de1c5ee2..f619469f34 100644
--- a/src/gpu/GrDrawTarget.h
+++ b/src/gpu/GrDrawTarget.h
@@ -952,15 +952,9 @@ protected:
                 return 0;
         }
     }
-    // given (a vertex layout and) a draw state, will a stage be used?
-    static bool StageWillBeUsed(int stage,
-                                const GrDrawState& state) {
-        return NULL != state.getTexture(stage);
-    }
 
     bool isStageEnabled(int stage) const {
-        return StageWillBeUsed(stage,
-                               this->getDrawState());
+        return this->getDrawState().isStageEnabled(stage);
     }
 
     StageMask enabledStages() const {