ecdd979bc0
Bug: skia:11216 Change-Id: I4affb8e00ff7e7b3e8d873ddfd653f397ca8d928 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/360979 Reviewed-by: Mike Reed <reed@google.com> Commit-Queue: Mike Reed <reed@google.com>
25 lines
1.0 KiB
C++
25 lines
1.0 KiB
C++
// 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(nullptr, 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->drawImage(bitmap.asImage(), 0, 0);
|
|
}
|
|
} // END FIDDLE
|