// 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=525285073aae7e53eb8f454a398f880c REG_FIDDLE(Canvas_MakeRasterDirect, 256, 256, true, 0) { void draw(SkCanvas* ) { SkImageInfo info = SkImageInfo::MakeN32Premul(3, 3); // device aligned, 32 bpp, Premultiplied const size_t minRowBytes = info.minRowBytes(); // bytes used by one bitmap row const size_t size = info.computeMinByteSize(); // bytes used by all rows SkAutoTMalloc storage(size); // allocate storage for pixels SkPMColor* pixels = storage.get(); // get pointer to allocated storage // create a SkCanvas backed by a raster device, and delete it when the // function goes out of scope. std::unique_ptr canvas = SkCanvas::MakeRasterDirect(info, pixels, minRowBytes); canvas->clear(SK_ColorWHITE); // white is Unpremultiplied, in ARGB order canvas->flush(); // ensure that pixels are cleared SkPMColor pmWhite = pixels[0]; // the Premultiplied format may vary SkPaint paint; // by default, draws black canvas->drawPoint(1, 1, paint); // draw in the center canvas->flush(); // ensure that point was drawn for (int y = 0; y < info.height(); ++y) { for (int x = 0; x < info.width(); ++x) { SkDebugf("%c", *pixels++ == pmWhite ? '-' : 'x'); } SkDebugf("\n"); } } } // END FIDDLE