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 REG_FIDDLE(Pixmap_readPixels_2, 256, 256, false, 3) {
draw(SkCanvas * canvas)5 void draw(SkCanvas* canvas) {
6 SkImageInfo info = SkImageInfo::MakeN32Premul(image->width(), image->height());
7 std::vector<int32_t> srcPixels;
8 const int rowBytes = image->width() * 4;
9 srcPixels.resize(image->height() * rowBytes);
10 SkPixmap pixmap(info, (const void*) &srcPixels.front(), rowBytes);
11 image->readPixels(nullptr, pixmap, 0, 0);
12 for (int offset : { 32, 64, 96 } ) {
13 std::vector<int32_t> dstPixels;
14 dstPixels.resize(image->height() * rowBytes);
15 pixmap.readPixels(info, &dstPixels.front(), rowBytes, offset, 0);
16 SkBitmap bitmap;
17 SkPixmap dstmap(info, &dstPixels.front(), rowBytes);
18 bitmap.installPixels(dstmap);
19 canvas->translate(32, 32);
20 canvas->drawImage(bitmap.asImage(), 0, 0);
21 }
22 }
23 } // END FIDDLE
24