// 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=086866243bf9e4c14c3b215a2aa69ad9 REG_FIDDLE(Pixmap_writable_addr32, 256, 72, false, 4) { void draw(SkCanvas* canvas) { std::vector pixels; pixels.resize(image->height() * image->width() * 4); SkPixmap pixmap(SkImageInfo::Make(image->width(), image->height(), kN32_SkColorType, image->alphaType()), (const void*) &pixels.front(), image->width() * 4); image->readPixels(pixmap, 0, 0); for (int y = 0; y < pixmap.height() / 2; ++y) { for (int x = 0; x < pixmap.width(); ++x) { if ((x & 4) == (y & 4)) { *pixmap.writable_addr32(x, y) = *pixmap.writable_addr32(pixmap.width() - x - 1, pixmap.height() - y - 1); } } } SkBitmap bitmap; bitmap.installPixels(pixmap); canvas->drawBitmap(bitmap, 0, 0); } } // END FIDDLE