| // 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=935c8f8b9782d297a73d7186f6ef7945 |
| REG_FIDDLE(Canvas_drawTextRSXform, 256, 256, false, 0) { |
| void draw(SkCanvas* canvas) { |
| const int iterations = 26; |
| SkRSXform transforms[iterations]; |
| char alphabet[iterations]; |
| SkScalar angle = 0; |
| SkScalar scale = 1; |
| for (size_t i = 0; i < std::size(transforms); ++i) { |
| const SkScalar s = SkScalarSin(angle) * scale; |
| const SkScalar c = SkScalarCos(angle) * scale; |
| transforms[i] = SkRSXform::Make(-c, -s, -s * 16, c * 16); |
| angle += .45f; |
| scale += .2f; |
| alphabet[i] = 'A' + i; |
| } |
| SkPaint paint; |
| SkFont font(nullptr, 20); |
| auto spiral = SkTextBlob::MakeFromRSXform(alphabet, sizeof(alphabet), transforms, font); |
| canvas->drawTextBlob(spiral, 110, 138, paint); |
| } |
| } // END FIDDLE |