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- // 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<int32_t> 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
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