| // Copyright 2020 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" |
| REG_FIDDLE_SRGB(50_percent_gray, 530, 150, false, 0, 0, false) { |
| static sk_sp<SkShader> make_bw_dither() { |
| auto surf = SkSurfaces::Raster(SkImageInfo::MakeN32Premul(2, 2)); |
| surf->getCanvas()->drawColor(SK_ColorWHITE); |
| surf->getCanvas()->drawRect({0, 0, 1, 1}, SkPaint()); |
| surf->getCanvas()->drawRect({1, 1, 2, 2}, SkPaint()); |
| return surf->makeImageSnapshot()->makeShader(SkTileMode::kRepeat, |
| SkTileMode::kRepeat, |
| SkSamplingOptions(SkFilterMode::kLinear)); |
| } |
| |
| void draw(SkCanvas* canvas) { |
| canvas->drawColor(SK_ColorWHITE); |
| SkFont font(nullptr, 12); |
| |
| // BW Dither |
| canvas->translate(5, 5); |
| SkPaint p; |
| p.setShader(make_bw_dither()); |
| canvas->drawRect({0, 0, 100, 100}, p); |
| SkPaint black; |
| canvas->drawString("BW Dither", 0, 125, font, black); |
| |
| // Scaled BW Dither |
| canvas->translate(105, 0); |
| canvas->save(); |
| canvas->scale(0.5, 0.5); |
| canvas->drawRect({0, 0, 200, 200}, p); |
| canvas->restore(); |
| canvas->drawString("Scaled Dither", 0, 125, font, black); |
| |
| // Blend black on to white |
| canvas->translate(105, 0); |
| p.setColor(0x80000000); |
| p.setShader(nullptr); |
| canvas->drawRect({0, 0, 100, 100}, p); |
| p.setShader(nullptr); |
| canvas->drawString("Blend", 0, 125, font, black); |
| |
| // Opaque color (0xFFBCBCBC) |
| canvas->translate(105, 0); |
| p.setColor(0xFFBCBCBC); |
| canvas->drawRect({0, 0, 100, 100}, p); |
| canvas->drawString("0xFFBCBCBC", 0, 125, font, black); |
| |
| // Opaque color (0xFF808080) |
| canvas->translate(105, 0); |
| p.setColor(0xFF808080); |
| canvas->drawRect({0, 0, 100, 100}, p); |
| canvas->drawString("0xFF808080", 0, 125, font, black); |
| } |
| } // END FIDDLE |