Added GrGLFragmentProcessor::EmitArgs struct for use with emitCode()

src/gpu/gl/GrGLFragmentProcessor.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLFragmentProcessor_DEFINED
 #define GrGLFragmentProcessor_DEFINED
 
@@ skipping 23 matching lines @@
         @param outputColor  A predefined vec4 in the FS in which the stage should place its output
                             color (or coverage).
         @param inputColor   A vec4 that holds the input color to the stage in the FS. This may be
                             NULL in which case the implied input is solid white (all ones).
                             TODO: Better system for communicating optimization info (e.g. input
                             color is solid white, trans black, known to be opaque, etc.) that allows
                             the processor to communicate back similar known info about its output.
         @param samplers     Contains one entry for each GrTextureAccess of the GrProcessor. These
                             can be passed to the builder to emit texture reads in the generated
                             code.
-        TODO this should take a struct
         */
-    virtual void emitCode(GrGLFPBuilder* builder,
-                          const GrFragmentProcessor&,
-                          const char* outputColor,
-                          const char* inputColor,
-                          const TransformedCoordsArray& coords,
-                          const TextureSamplerArray& samplers) = 0;
+
+    struct EmitArgs {
+        EmitArgs(GrGLFPBuilder* builder,
+                 const GrFragmentProcessor& fp,
+                 const char* outputColor,
+                 const char* inputColor,
+                 const TransformedCoordsArray& coords,
+                 const TextureSamplerArray& samplers)
+            : fBuilder(builder)
+            , fFp(fp)
+            , fOutputColor(outputColor)
+            , fInputColor(inputColor)
+            , fCoords(coords)
+            , fSamplers(samplers) {}
+        GrGLFPBuilder* fBuilder;
+        const GrFragmentProcessor& fFp;
+        const char* fOutputColor;
+        const char* fInputColor;
+        const TransformedCoordsArray& fCoords;
+        const TextureSamplerArray& fSamplers;
+    };
+
+    virtual void emitCode(EmitArgs&) = 0;
 
     /** A GrGLFragmentProcessor instance can be reused with any GrFragmentProcessor that produces
         the same stage key; this function reads data from a GrFragmentProcessor and uploads any
         uniform variables required by the shaders created in emitCode(). The GrFragmentProcessor
         parameter is guaranteed to be of the same type that created this GrGLFragmentProcessor and
         to have an identical processor key as the one that created this GrGLFragmentProcessor.  */
     // TODO update this to pass in GrFragmentProcessor
     virtual void setData(const GrGLProgramDataManager&, const GrProcessor&) {}
 
     static void GenKey(const GrProcessor&, const GrGLSLCaps&, GrProcessorKeyBuilder*) {}
 
 private:
     typedef GrGLProcessor INHERITED;
 };
 
 #endif