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=8e3c8a9c1d0d2e9b8bf66e24d274f792
5 REG_FIDDLE(Pixmap_scalePixels, 256, 256, false, 3) {
draw(SkCanvas * canvas)6 void draw(SkCanvas* canvas) {
7 SkImageInfo info = SkImageInfo::MakeN32Premul(image->width(), image->height());
8 std::vector<int32_t> srcPixels;
9 int rowBytes = image->width() * 4;
10 srcPixels.resize(image->height() * rowBytes);
11 SkPixmap pixmap(info, (const void*) &srcPixels.front(), rowBytes);
12 image->readPixels(nullptr, pixmap, 0, 0);
13 for (int offset : { 32, 64, 96 } ) {
14 info = SkImageInfo::MakeN32Premul(image->width() + offset, image->height());
15 rowBytes = info.width() * 4;
16 std::vector<int32_t> dstPixels;
17 dstPixels.resize(image->height() * rowBytes);
18 SkPixmap dstmap(info, &dstPixels.front(), rowBytes);
19 pixmap.scalePixels(dstmap, SkSamplingOptions(SkFilterMode::kLinear,
20 SkMipmapMode::kNearest));
21 SkBitmap bitmap;
22 bitmap.installPixels(dstmap);
23 canvas->translate(32, 32);
24 canvas->drawImage(bitmap.asImage(), 0, 0);
25 }
26 }
27 } // END FIDDLE
28