xref: /third_party/skia/docs/examples/Plus.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=05383441e510d54008402e128fc8ad2b
5REG_FIDDLE(Plus, 256, 256, false, 0) {
6void draw(SkCanvas* canvas) {
7    canvas->drawColor(SK_ColorBLACK);
8    SkPaint paint;
9    paint.setBlendMode(SkBlendMode::kPlus);
10    for (auto color : { SK_ColorRED, SK_ColorBLUE, SK_ColorGREEN } ) {
11        SkColor colors[] = { color, SkColorSetA(color, 192), SkColorSetA(color, 128),
12                             SkColorSetA(color, 0) };
13        paint.setShader(SkGradientShader::MakeRadial({ 64, 64}, 100,
14                colors, nullptr, SK_ARRAY_COUNT(colors), SkTileMode::kClamp));
15        canvas->drawCircle(64, 64, 100, paint);
16        canvas->translate(64, 64);
17    }
18}
19}  // END FIDDLE
20