1cb93a386Sopenharmony_ci// Copyright 2019 Google LLC. 2cb93a386Sopenharmony_ci// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. 3cb93a386Sopenharmony_ci#include "tools/fiddle/examples.h" 4cb93a386Sopenharmony_ci// HASH=935c8f8b9782d297a73d7186f6ef7945 5cb93a386Sopenharmony_ciREG_FIDDLE(Canvas_drawTextRSXform, 256, 256, false, 0) { 6cb93a386Sopenharmony_civoid draw(SkCanvas* canvas) { 7cb93a386Sopenharmony_ci const int iterations = 26; 8cb93a386Sopenharmony_ci SkRSXform transforms[iterations]; 9cb93a386Sopenharmony_ci char alphabet[iterations]; 10cb93a386Sopenharmony_ci SkScalar angle = 0; 11cb93a386Sopenharmony_ci SkScalar scale = 1; 12cb93a386Sopenharmony_ci for (size_t i = 0; i < SK_ARRAY_COUNT(transforms); ++i) { 13cb93a386Sopenharmony_ci const SkScalar s = SkScalarSin(angle) * scale; 14cb93a386Sopenharmony_ci const SkScalar c = SkScalarCos(angle) * scale; 15cb93a386Sopenharmony_ci transforms[i] = SkRSXform::Make(-c, -s, -s * 16, c * 16); 16cb93a386Sopenharmony_ci angle += .45f; 17cb93a386Sopenharmony_ci scale += .2f; 18cb93a386Sopenharmony_ci alphabet[i] = 'A' + i; 19cb93a386Sopenharmony_ci } 20cb93a386Sopenharmony_ci SkPaint paint; 21cb93a386Sopenharmony_ci SkFont font(nullptr, 20); 22cb93a386Sopenharmony_ci auto spiral = SkTextBlob::MakeFromRSXform(alphabet, sizeof(alphabet), transforms, font); 23cb93a386Sopenharmony_ci canvas->drawTextBlob(spiral, 110, 138, paint); 24cb93a386Sopenharmony_ci} 25cb93a386Sopenharmony_ci} // END FIDDLE 26