Fix for PNG, coding style, skip opaque.

samplecode/SampleUnpremul.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "gm.h"
 #include "SampleCode.h"
 #include "SkBlurDrawLooper.h"
 #include "SkCanvas.h"
@@ skipping 10 matching lines @@
 
 __SK_FORCE_IMAGE_DECODER_LINKING;
 
 // Defined in SampleColorFilter.cpp
 extern SkShader* createChecker();
 
 /**
  *  Interprets c as an unpremultiplied color, and returns the
  *  premultiplied equivalent.
  */
-SkPMColor SkPreMultiplyUnPMColor(SkPMColor c) {
+static SkPMColor premultiply_unpmcolor(SkPMColor c) {
     U8CPU a = SkGetPackedA32(c);
     U8CPU r = SkGetPackedR32(c);
     U8CPU g = SkGetPackedG32(c);
     U8CPU b = SkGetPackedB32(c);
     return SkPreMultiplyARGB(a, r, g, b);
 }
 
 class UnpremulView : public SampleView {
 public:
     UnpremulView(SkString res)
@@ skipping 83 matching lines @@
             bm.setConfig(SkBitmap::kARGB_8888_Config, fBitmap.width(),
                          fBitmap.height());
             SkASSERT(fBitmap.config() == SkBitmap::kARGB_8888_Config);
             if (!bm.allocPixels()) {
                 SkString errMsg("allocPixels failed");
                 canvas->drawText(errMsg.c_str(), errMsg.size(), 0, height, paint);
                 return;
             }
             for (int i = 0; i < fBitmap.width(); ++i) {
                 for (int j = 0; j < fBitmap.height(); ++j) {
-                    *bm.getAddr32(i, j) = SkPreMultiplyUnPMColor(*fBitmap.getAddr32(i, j));
+                    *bm.getAddr32(i, j) = premultiply_unpmcolor(*fBitmap.getAddr32(i, j));
                 }
             }
             canvas->drawBitmap(bm, 0, 0);
         } else {
             canvas->drawBitmap(fBitmap, 0, 0);
         }
     }
 
 private:
     const SkString  fResPath;
@@ skipping 49 matching lines @@
 
     typedef SampleView INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 static SkView* MyFactory() {
     return new UnpremulView(skiagm::GM::GetResourcePath());
 }
 static SkViewRegister reg(MyFactory);