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=39016b3cfc6bbabb09348a53822ce508
5 REG_FIDDLE(Matrix_cheapEqualTo, 256, 256, true, 0) {
draw(SkCanvas * canvas)6 void draw(SkCanvas* canvas) {
7 auto debugster = [](const char* prefix, const SkMatrix& a, const SkMatrix& b) -> void {
8 SkDebugf("%s: a %c= b a.cheapEqualTo(b): %s\n", prefix,
9 a == b ? '=' : '!', a.cheapEqualTo(b) ? "true" : "false");
10 };
11 SkMatrix a, b;
12 a.setAll(1, 0, 0, 0, 1, 0, 0, 0, 1);
13 b.setIdentity();
14 debugster("identity", a, b);
15 a.setAll(1, -0.0f, 0, 0, 1, 0, 0, 0, 1);
16 debugster("neg zero", a, b);
17 a.setAll(1, SK_ScalarNaN, 0, 0, 1, 0, 0, 0, 1);
18 debugster(" one NaN", a, b);
19 b.setAll(1, SK_ScalarNaN, 0, 0, 1, 0, 0, 0, 1);
20 debugster("both NaN", a, b);
21 }
22 } // END FIDDLE
23