xref: /aosp_15_r20/external/skia/docs/examples/Canvas_empty_constructor.cpp (revision c8dee2aa9b3f27cf6c858bd81872bdeb2c07ed17) 
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 REG_FIDDLE(Canvas_empty_constructor, 256, 256, true, 0) {
check_for_rotated_ctm(const SkCanvas * canvas)5 static void check_for_rotated_ctm(const SkCanvas* canvas) {
6     const SkM44 matrix = canvas->getLocalToDevice();
7     SkDebugf("ctm is identity = %s\n", matrix == SkM44() ? "true" : "false");
8 }
9 
draw(SkCanvas * canvas)10 void draw(SkCanvas* canvas) {
11     check_for_rotated_ctm(canvas);
12     canvas->rotate(30);
13     check_for_rotated_ctm(canvas);
14     SkCanvas defaultCanvas;
15     check_for_rotated_ctm(&defaultCanvas);
16 }
17 }  // END FIDDLE
18