Add matrix constructing helpers to SkMatrix

bench/DashBench.cpp

 
 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #include "Benchmark.h"
 #include "SkBitmap.h"
 #include "SkCanvas.h"
@@ skipping 135 matching lines @@
     for (int i = 1; i < n; i++) {
         rad += drad;
         SkScalar cosV, sinV = SkScalarSinCos(rad, &cosV);
         path->lineTo(cosV, sinV);
     }
     path->close();
 }
 
 static void make_poly(SkPath* path) {
     make_unit_star(path, 9);
-    SkMatrix matrix;
-    matrix.setScale(SkIntToScalar(100), SkIntToScalar(100));
+    const SkMatrix matrix = SkMatrix::MakeScale(SkIntToScalar(100), SkIntToScalar(100));
     path->transform(matrix);
 }
 
 static void make_quad(SkPath* path) {
     SkScalar x0 = SkIntToScalar(10);
     SkScalar y0 = SkIntToScalar(10);
     path->moveTo(x0, y0);
     path->quadTo(x0,                    y0 + 400 * SK_Scalar1,
                  x0 + 600 * SK_Scalar1, y0 + 400 * SK_Scalar1);
 }
@@ skipping 312 matching lines @@
 // hori_2 is just too slow to enable at the moment
 DEF_BENCH( return new GiantDashBench(GiantDashBench::kHori_LineType, 2); )
 DEF_BENCH( return new GiantDashBench(GiantDashBench::kVert_LineType, 2); )
 DEF_BENCH( return new GiantDashBench(GiantDashBench::kDiag_LineType, 2); )
 
 DEF_BENCH( return new DashGridBench(1, 1, true); )
 DEF_BENCH( return new DashGridBench(1, 1, false); )
 DEF_BENCH( return new DashGridBench(3, 1, true); )
 DEF_BENCH( return new DashGridBench(3, 1, false); )
 #endif