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=9b3133a6673d2514d166398adbe1f9f4
5REG_FIDDLE(Bitmap_writePixels, 256, 256, false, 3) {
6void draw(SkCanvas* canvas) {
7    std::vector<int32_t> srcPixels;
8    int width = image->width();
9    int height = image->height();
10    srcPixels.resize(height * width  * 4);
11    SkPixmap pixmap(SkImageInfo::MakeN32Premul(width, height), (const void*) &srcPixels.front(),
12                    width * 4);
13    image->readPixels(nullptr, pixmap, 0, 0);
14    canvas->scale(.5f, .5f);
15    width /= 4;
16    height /= 4;
17    for (int y = 0; y < 4; ++y) {
18        for (int x = 0; x < 4; ++x) {
19            SkBitmap bitmap;
20            bitmap.allocPixels(SkImageInfo::MakeN32Premul(width, height));
21            bitmap.writePixels(pixmap, -y * width, -x * height);
22            canvas->drawImage(bitmap.asImage(), x * width, y * height);
23        }
24    }
25}
26}  // END FIDDLE
27