blob: f6b408ffdd2abc0fe0ebe3ba14e0c26d96ceffdf [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=e72db006f1bea26feceaef8727ff9818
REG_FIDDLE(ImageInfo_makeAlphaType, 256, 256, false, 3) {
void draw(SkCanvas* canvas) {
const int width = 256;
const int height = 128;
SkColor pixels[height][width];
for (int y = 0; y < height; ++y) {
for (int x = 0; x < width; ++x) {
int red = SkScalarRoundToInt(255 * SkScalarAbs(SkScalarSin((x * 4 + y) * 0.03f)));
int blue = SkScalarRoundToInt(255 * SkScalarAbs(SkScalarCos((x * 3 + y) * 0.04f)));
int green = SkScalarRoundToInt(255 * SkScalarAbs(SkScalarSin((x * 2 + y) * 0.05f)));
int alpha = SkScalarRoundToInt(255 * SkScalarAbs(SkScalarCos((x * 1 + y) * 0.006f)));
pixels[y][x] =
SkColorSetARGB(alpha, red * alpha / 255, green * alpha / 255, blue * alpha / 255);
}
}
SkBitmap bitmap;
SkImageInfo info = SkImageInfo::Make(width, height, kBGRA_8888_SkColorType, kPremul_SkAlphaType);
bitmap.installPixels(info, (void*) pixels, sizeof(SkColor) * width);
canvas->drawBitmap(source, 0, 0);
canvas->drawBitmap(bitmap, 0, 0);
SkImageInfo unpremulInfo = info.makeAlphaType(kUnpremul_SkAlphaType);
bitmap.installPixels(unpremulInfo, (void*) pixels, sizeof(SkColor) * width);
canvas->drawBitmap(bitmap, 0, 128);
}
} // END FIDDLE