blob: 1e9191ffa6e5315acb36145f95eda081bc203061 [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=0424f67ebc2858e8fd04ae3367b115ff
REG_FIDDLE(Alpha_Constants_b, 256, 128, false, 1) {
void draw(SkCanvas* canvas) {
std::vector<int32_t> srcPixels;
srcPixels.resize(source.height() * source.rowBytes());
SkPixmap pixmap(SkImageInfo::MakeN32Premul(source.width(), source.height()),
&srcPixels.front(), source.rowBytes());
source.readPixels(pixmap, 0, 0);
for (int y = 0; y < source.height(); ++y) {
for (int x = 0; x < source.width(); ++x) {
SkPMColor pixel = srcPixels[y * source.width() + x];
const SkColor color = SkUnPreMultiply::PMColorToColor(pixel);
if (SkColorGetA(color) == SK_AlphaOPAQUE) {
srcPixels[y * source.width() + x] = SK_ColorGREEN;
}
}
}
canvas->drawImage(SkImage::MakeRasterCopy(pixmap), 0, 0);
}
} // END FIDDLE