| Hal Canary | 6c8422c | 2020-01-10 15:22:09 -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(shader_alphaimage, 256, 256, false, 0) { |
| 5 | sk_sp<SkImage> alpha_image() { |
| 6 | auto s = SkSurface::MakeRaster(SkImageInfo::MakeA8(128, 128)); |
| 7 | s->getCanvas()->clear(SkColorSetARGB(0xF0, 0x00, 0x00, 0x00)); |
| 8 | return s->makeImageSnapshot(); |
| 9 | } |
| 10 | sk_sp<SkShader> linear_gradient() { |
| 11 | SkPoint gpts[2] = {{0, 0}, {256, 256}}; |
| 12 | SkColor gc[6] = {SK_ColorCYAN, SK_ColorBLUE, SK_ColorMAGENTA, |
| 13 | SK_ColorRED, SK_ColorYELLOW, SK_ColorGREEN}; |
| 14 | return SkGradientShader::MakeLinear(gpts, gc, nullptr, 6, SkTileMode::kClamp); |
| 15 | } |
| 16 | |
| 17 | void draw(SkCanvas* canvas) { |
| 18 | canvas->clear(SK_ColorLTGRAY); |
| 19 | SkPaint p; |
| 20 | p.setShader(linear_gradient()); |
| 21 | auto i = alpha_image(); |
| 22 | canvas->drawImage(i.get(), 128, 0, &p); |
| 23 | canvas->drawRect({0, 128, 128, 256}, p); |
| 24 | } |
| 25 | } // END FIDDLE |