xref: /third_party/skia/docs/examples/Xor.cpp (revision cb93a386)
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=29db2c7493d9098b8a086ddbe30dd6d6
5REG_FIDDLE(Xor, 256, 256, false, 0) {
6void draw(SkCanvas* canvas) {
7    SkPaint paint;
8    paint.setBlendMode(SkBlendMode::kXor);
9    for (auto color : { SK_ColorRED, SK_ColorBLUE, SK_ColorGREEN } ) {
10        SkColor colors[] = { color, SkColorSetA(color, 192), SkColorSetA(color, 128),
11                             SkColorSetA(color, 0) };
12        paint.setShader(SkGradientShader::MakeRadial({ 64, 64}, 100,
13                colors, nullptr, SK_ARRAY_COUNT(colors), SkTileMode::kClamp));
14        canvas->drawCircle(64, 64, 100, paint);
15        canvas->translate(64, 64);
16    }
17}
18}  // END FIDDLE
19