Hal Canary | 9d9312b | 2020-01-16 12:45:33 -0500 | [diff] [blame] | 1 | // Copyright 2020 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_SRGB(50_percent_gray, 530, 150, false, 0, 0, false) { |
| 5 | static sk_sp<SkShader> make_bw_dither() { |
| 6 | auto surf = SkSurface::MakeRasterN32Premul(2, 2); |
| 7 | surf->getCanvas()->drawColor(SK_ColorWHITE); |
| 8 | surf->getCanvas()->drawRect({0, 0, 1, 1}, SkPaint()); |
| 9 | surf->getCanvas()->drawRect({1, 1, 2, 2}, SkPaint()); |
| 10 | return surf->makeImageSnapshot()->makeShader(SkTileMode::kRepeat, |
| 11 | SkTileMode::kRepeat); |
| 12 | } |
| 13 | |
| 14 | void draw(SkCanvas* canvas) { |
| 15 | canvas->drawColor(SK_ColorWHITE); |
| 16 | SkFont font(nullptr, 12); |
| 17 | |
| 18 | // BW Dither |
| 19 | canvas->translate(5, 5); |
| 20 | SkPaint p; |
| 21 | p.setShader(make_bw_dither()); |
| 22 | canvas->drawRect({0, 0, 100, 100}, p); |
| 23 | SkPaint black; |
| 24 | canvas->drawString("BW Dither", 0, 125, font, black); |
| 25 | |
| 26 | // Scaled BW Dither |
| 27 | canvas->translate(105, 0); |
| 28 | p.setFilterQuality(kLow_SkFilterQuality); |
| 29 | canvas->save(); |
| 30 | canvas->scale(0.5, 0.5); |
| 31 | canvas->drawRect({0, 0, 200, 200}, p); |
| 32 | canvas->restore(); |
| 33 | canvas->drawString("Scaled Dither", 0, 125, font, black); |
| 34 | |
| 35 | // Blend black on to white |
| 36 | canvas->translate(105, 0); |
| 37 | p.setColor(0x80000000); |
| 38 | p.setShader(nullptr); |
| 39 | canvas->drawRect({0, 0, 100, 100}, p); |
| 40 | p.setShader(nullptr); |
| 41 | drawString(canvas,"Blend", 0, 125, font, black); |
| 42 | |
| 43 | // Opaque color (0xFFBCBCBC) |
| 44 | canvas->translate(105, 0); |
| 45 | p.setColor(0xFFBCBCBC); |
| 46 | canvas->drawRect({0, 0, 100, 100}, p); |
| 47 | canvas->drawString("0xFFBCBCBC", 0, 125, font, black); |
| 48 | |
| 49 | // Opaque color (0xFF808080) |
| 50 | canvas->translate(105, 0); |
| 51 | p.setColor(0xFF808080); |
| 52 | canvas->drawRect({0, 0, 100, 100}, p); |
| 53 | canvas->drawString("0xFF808080", 0, 125, font, black); |
| 54 | } |
| 55 | } // END FIDDLE |