blob: 2bb7a3e0ea996e8179e3cffe3278466d4db2e736 [file] [log] [blame]
// Copyright 2019 Google LLC.
// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
#include "tools/fiddle/examples.h"
// HASH=b77a73c4baa63a4a8e2a4fdd96144d0b
REG_FIDDLE(Image_readPixels_2, 256, 256, false, 3) {
void draw(SkCanvas* canvas) {
std::vector<int32_t> srcPixels;
int rowBytes = image->width() * 4;
int quarterWidth = image->width() / 4;
int quarterHeight = image->height() / 4;
srcPixels.resize(image->height() * rowBytes);
for (int y = 0; y < 4; ++y) {
for (int x = 0; x < 4; ++x) {
SkPixmap pixmap(SkImageInfo::MakeN32Premul(quarterWidth, quarterHeight),
&srcPixels.front() + x * image->height() * quarterWidth +
y * quarterWidth, rowBytes);
image->readPixels(nullptr, pixmap, x * quarterWidth, y * quarterHeight);
}
}
canvas->scale(.5f, .5f);
SkBitmap bitmap;
bitmap.installPixels(SkImageInfo::MakeN32Premul(image->width(), image->height()),
&srcPixels.front(), rowBytes);
canvas->drawImage(bitmap.asImage(), 0, 0);
}
} // END FIDDLE