1// Copyright 2020 Google LLC.
2// Use of this source code is governed by a BSD-style license that can be found in the LICENSE file.
3#include "tools/fiddle/examples.h"
4REG_FIDDLE(gpu8888diff, 256, 256, false, 0) {
5void draw(SkCanvas* canvas) {
6    canvas->scale(16, 16);
7    SkBitmap bitmap;
8    SkImageInfo imageInfo =
9            SkImageInfo::Make(2, 2, kRGBA_8888_SkColorType, kPremul_SkAlphaType);
10    bitmap.allocPixels(imageInfo);
11    SkCanvas offscreen(bitmap);
12    offscreen.clear(SK_ColorGREEN);
13    canvas->drawImage(bitmap.asImage(), 0, 0);
14    offscreen.clear(SK_ColorGRAY);
15    canvas->drawImage(bitmap.asImage(), 2, 2);
16    auto pack8888 = [](unsigned a, unsigned r, unsigned g, unsigned b) -> uint32_t {
17        return (a << 24) | (b << 16) | (g << 8) | (r << 0);
18    };
19    uint32_t red8888[] = {pack8888(0xFF, 0xFF, 0x0, 0x0), pack8888(0xFF, 0xbb, 0x0, 0x0),
20                          pack8888(0xFF, 0x99, 0x0, 0x0), pack8888(0xFF, 0x55, 0x0, 0x0)};
21    uint32_t blue8888[] = {pack8888(0xFF, 0x0, 0x0, 0x0FF), pack8888(0xFF, 0x0, 0x0, 0x0bb),
22                           pack8888(0xFF, 0x0, 0x0, 0x099), pack8888(0xFF, 0x0, 0x0, 0x055)};
23    SkPixmap redPixmap(imageInfo, &red8888, 8);
24    if (bitmap.writePixels(redPixmap, 0, 0)) {
25        canvas->drawImage(bitmap.asImage(), 4, 4);
26    }
27    SkPixmap bluePixmap(imageInfo, &blue8888, 8);
28    if (bitmap.writePixels(bluePixmap, 0, 0)) {
29        canvas->drawImage(bitmap.asImage(), 6, 6);
30    }
31}
32}  // END FIDDLE
33