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=5949c9a63610cae30019e5b1899ee38f 5cb93a386Sopenharmony_ciREG_FIDDLE(Image_scalePixels, 256, 128, false, 3) { 6cb93a386Sopenharmony_civoid draw(SkCanvas* canvas) { 7cb93a386Sopenharmony_ci std::vector<int32_t> srcPixels; 8cb93a386Sopenharmony_ci int quarterWidth = image->width() / 16; 9cb93a386Sopenharmony_ci int rowBytes = quarterWidth * 4; 10cb93a386Sopenharmony_ci int quarterHeight = image->height() / 16; 11cb93a386Sopenharmony_ci srcPixels.resize(quarterHeight * rowBytes); 12cb93a386Sopenharmony_ci SkPixmap pixmap(SkImageInfo::MakeN32Premul(quarterWidth, quarterHeight), 13cb93a386Sopenharmony_ci &srcPixels.front(), rowBytes); 14cb93a386Sopenharmony_ci canvas->scale(4, 4); 15cb93a386Sopenharmony_ci 16cb93a386Sopenharmony_ci const SkSamplingOptions samplings[] = { 17cb93a386Sopenharmony_ci SkSamplingOptions(), 18cb93a386Sopenharmony_ci SkSamplingOptions(SkFilterMode::kLinear), 19cb93a386Sopenharmony_ci SkSamplingOptions(SkFilterMode::kLinear, SkMipmapMode::kLinear), 20cb93a386Sopenharmony_ci SkSamplingOptions({1.0f/3, 1.0f/3}), 21cb93a386Sopenharmony_ci }; 22cb93a386Sopenharmony_ci for (unsigned index = 0; index < SK_ARRAY_COUNT(samplings); ++index) { 23cb93a386Sopenharmony_ci image->scalePixels(pixmap, samplings[index]); 24cb93a386Sopenharmony_ci sk_sp<SkImage> filtered = SkImage::MakeFromRaster(pixmap, nullptr, nullptr); 25cb93a386Sopenharmony_ci canvas->drawImage(filtered, 16 * index, 0); 26cb93a386Sopenharmony_ci } 27cb93a386Sopenharmony_ci} 28cb93a386Sopenharmony_ci} // END FIDDLE 29