xref: /aosp_15_r20/external/skia/docs/examples/Plus.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(Plus, 256, 256, false, 0) {
draw(SkCanvas * canvas)5 void draw(SkCanvas* canvas) {
6     canvas->drawColor(SK_ColorBLACK);
7     SkPaint paint;
8     paint.setBlendMode(SkBlendMode::kPlus);
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, std::size(colors), SkTileMode::kClamp));
14         canvas->drawCircle(64, 64, 100, paint);
15         canvas->translate(64, 64);
16     }
17 }
18 }  // END FIDDLE
19