| // 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, std::size(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 |