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Hal Canary87515122019-03-15 14:22:51 -04001// 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.
Mike Kleinc0bd9f92019-04-23 12:05:21 -05003#include "tools/fiddle/examples.h"
Hal Canary87515122019-03-15 14:22:51 -04004// HASH=094ca0bd37588cc7be241bb387a3e17b
Hal Canarya7181e7c2019-03-18 16:06:34 -04005REG_FIDDLE(Pixmap_readPixels_2, 256, 256, false, 3) {
Hal Canary87515122019-03-15 14:22:51 -04006void draw(SkCanvas* canvas) {
7 SkImageInfo info = SkImageInfo::MakeN32Premul(image->width(), image->height());
8 std::vector<int32_t> srcPixels;
9 const int rowBytes = image->width() * 4;
10 srcPixels.resize(image->height() * rowBytes);
11 SkPixmap pixmap(info, (const void*) &srcPixels.front(), rowBytes);
12 image->readPixels(pixmap, 0, 0);
13 for (int offset : { 32, 64, 96 } ) {
14 std::vector<int32_t> dstPixels;
15 dstPixels.resize(image->height() * rowBytes);
16 pixmap.readPixels(info, &dstPixels.front(), rowBytes, offset, 0);
17 SkBitmap bitmap;
18 SkPixmap dstmap(info, &dstPixels.front(), rowBytes);
19 bitmap.installPixels(dstmap);
20 canvas->translate(32, 32);
21 canvas->drawBitmap(bitmap, 0, 0);
22 }
23}
24} // END FIDDLE