blob: 73039c5df0f5341632a7c3e7c83444d8c09f1f98 [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=086866243bf9e4c14c3b215a2aa69ad9
REG_FIDDLE(Pixmap_writable_addr32, 256, 72, false, 4) {
void draw(SkCanvas* canvas) {
std::vector<int32_t> pixels;
pixels.resize(image->height() * image->width() * 4);
SkPixmap pixmap(SkImageInfo::Make(image->width(), image->height(), kN32_SkColorType,
image->alphaType()), (const void*) &pixels.front(), image->width() * 4);
image->readPixels(pixmap, 0, 0);
for (int y = 0; y < pixmap.height() / 2; ++y) {
for (int x = 0; x < pixmap.width(); ++x) {
if ((x & 4) == (y & 4)) {
*pixmap.writable_addr32(x, y) =
*pixmap.writable_addr32(pixmap.width() - x - 1, pixmap.height() - y - 1);
}
}
}
SkBitmap bitmap;
bitmap.installPixels(pixmap);
canvas->drawBitmap(bitmap, 0, 0);
}
} // END FIDDLE