1// Copyright 2019 Google LLC.
2// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
3#include "tools/fiddle/examples.h"
4// HASH=e9f70cbc9827097449a386ec7a8a8188
5REG_FIDDLE(Bitmap_readPixels_2, 256, 256, false, 3) {
6void draw(SkCanvas* canvas) {
7    std::vector<int32_t> srcPixels;
8    srcPixels.resize(source.height() * source.rowBytes());
9    for (int y = 0; y < 4; ++y) {
10        for (int x = 0; x < 4; ++x) {
11            SkPixmap pixmap(SkImageInfo::MakeN32Premul(source.width() / 4, source.height() / 4),
12                    &srcPixels.front() + x * source.height() * source.width() / 4 +
13                    y * source.width() / 4, source.rowBytes());
14            source.readPixels(pixmap, x * source.width() / 4, y * source.height() / 4);
15        }
16    }
17    canvas->scale(.5f, .5f);
18    SkBitmap bitmap;
19    bitmap.installPixels(SkImageInfo::MakeN32Premul(source.width(), source.height()),
20                             &srcPixels.front(), source.rowBytes());
21    canvas->drawImage(bitmap.asImage(), 0, 0);
22}
23}  // END FIDDLE
24