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=8aa8ca63dff4641dfc6ea8a3c555d59c
5 REG_FIDDLE(Image_readPixels, 256, 256, false, 3) {
draw(SkCanvas * canvas)6 void draw(SkCanvas* canvas) {
7 canvas->scale(.5f, .5f);
8 const int width = 32;
9 const int height = 32;
10 std::vector<int32_t> dstPixels;
11 dstPixels.resize(height * width * 4);
12 SkImageInfo info = SkImageInfo::MakeN32Premul(width, height);
13 for (int y = 0; y < 512; y += height ) {
14 for (int x = 0; x < 512; x += width ) {
15 if (image->readPixels(nullptr, info, &dstPixels.front(), width * 4, x, y)) {
16 SkPixmap dstPixmap(info, &dstPixels.front(), width * 4);
17 SkBitmap bitmap;
18 bitmap.installPixels(dstPixmap);
19 canvas->drawImage(bitmap.asImage(), 0, 0);
20 }
21 canvas->translate(48, 0);
22 }
23 canvas->translate(-16 * 48, 48);
24 }
25 }
26 } // END FIDDLE
27