1 // Copyright 2019 Google LLC.
2 // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
3 #include "tools/fiddle/examples.h"
4 // HASH=139b874da0a3ede1f3df88119085c0aa
5 REG_FIDDLE(Matrix_decomposeScale, 256, 256, true, 0) {
draw(SkCanvas * canvas)6 void draw(SkCanvas* canvas) {
7 SkMatrix matrix;
8 matrix.setRotate(90 * SK_Scalar1);
9 matrix.postScale(1.f / 4, 1.f / 2);
10 matrix.dump();
11 SkSize scale = {SK_ScalarNaN, SK_ScalarNaN};
12 SkMatrix remaining;
13 remaining.reset();
14 bool success = matrix.decomposeScale(&scale, &remaining);
15 SkDebugf("success: %s ", success ? "true" : "false");
16 SkDebugf("scale: %g, %g\n", scale.width(), scale.height());
17 remaining.dump();
18 SkMatrix scaleMatrix = SkMatrix::Scale(scale.width(), scale.height());
19 SkMatrix combined = SkMatrix::Concat(scaleMatrix, remaining);
20 combined.dump();
21 }
22 } // END FIDDLE
23