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- // Copyright 2019 Google LLC.
- // Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
- #include "tools/fiddle/examples.h"
- // HASH=3fdac2b2f48bd227d2e74234c260bc8e
- REG_FIDDLE(Modulate, 256, 256, false, 0) {
- void draw(SkCanvas* canvas) {
- auto drawSquare = [=](int dx, int dy, SkBlendMode mode, const char* label) -> void {
- const SkColor colors[] = { SK_ColorBLACK, SK_ColorWHITE };
- const SkPoint horz[] = { { 0, 0 }, { 128, 0 } };
- SkPaint paint;
- paint.setShader(SkGradientShader::MakeLinear(horz, colors, nullptr, SK_ARRAY_COUNT(colors),
- SkTileMode::kClamp));
- paint.setBlendMode(mode);
- canvas->translate(dx, dy);
- canvas->drawRect({0, 0, 128, 128}, paint);
- paint.setBlendMode(SkBlendMode::kXor);
- SkFont font;
- canvas->drawString(label, 40, 100, font, paint);
- };
- drawSquare(0, 0, SkBlendMode::kSrc, "destination");
- drawSquare(128, 0, SkBlendMode::kSrc, "");
- drawSquare(0, 128, SkBlendMode::kSrc, "");
- canvas->translate(-128, -128);
- canvas->rotate(90, 0, 128);
- drawSquare(0, 0, SkBlendMode::kSrc, "source");
- drawSquare(0, -128, SkBlendMode::kModulate, "modulate");
- drawSquare(-128, 0, SkBlendMode::kMultiply, "multiply");
- }
- } // END FIDDLE
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