Modify Read/WritePixelTests to print one pixel failure for each test case rather than every pixel

Review URL: http://codereview.appspot.com/6450154/



git-svn-id: http://skia.googlecode.com/svn/trunk@5147 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/WritePixelsTest.cpp b/tests/WritePixelsTest.cpp
index 5911b80..d5ce8af 100644
--- a/tests/WritePixelsTest.cpp
+++ b/tests/WritePixelsTest.cpp
@@ -241,7 +241,6 @@
     intptr_t canvasPixels = reinterpret_cast<intptr_t>(devBmp.getPixels());
     size_t canvasRowBytes = devBmp.rowBytes();
     SkIRect writeRect = SkIRect::MakeXYWH(writeX, writeY, bitmap.width(), bitmap.height());
-    bool success = true;
     for (int cy = 0; cy < DEV_H; ++cy) {
         const SkPMColor* canvasRow = reinterpret_cast<const SkPMColor*>(canvasPixels);
         for (int cx = 0; cx < DEV_W; ++cx) {
@@ -255,14 +254,14 @@
                 bool check;
                 REPORTER_ASSERT(reporter, check = checkPixel(bmpPMColor, canvasPixel, mul));
                 if (!check) {
-                    success = false;
+                    return false;
                 }
             } else {
                 bool check;
                 SkPMColor testColor = getCanvasColor(cx, cy);
                 REPORTER_ASSERT(reporter, check = (canvasPixel == testColor));
                 if (!check) {
-                    success = false;
+                    return false;
                 }
             }
         }
@@ -272,14 +271,14 @@
                 bool check;
                 REPORTER_ASSERT(reporter, check = (pad[px] == static_cast<char>(DEV_PAD)));
                 if (!check) {
-                    success = false;
+                    return false;
                 }
             }
         }
         canvasPixels += canvasRowBytes;
     }
 
-    return success;
+    return true;
 }
 
 enum DevType {