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(SkImage_to_PPM_binary, 256, 256, true, 4) {
5void print_data(const SkData* data, const char* name) {
6    if (data) {
7        SkDebugf("\nxxd -r -p > %s << EOF", name);
8        size_t s = data->size();
9        const uint8_t* d = data->bytes();
10        for (size_t i = 0; i < s; ++i) {
11            if (i % 40 == 0) {
12                SkDebugf("\n");
13            }
14            SkDebugf("%02x", d[i]);
15        }
16        SkDebugf("\nEOF\n\n");
17    }
18}
19
20sk_sp<SkData> Encode_PPM_B(const SkPixmap& src) {
21    if (src.width() <= 0 || src.height() <= 0 || !src.addr() ||
22        src.colorType() == kUnknown_SkColorType) {
23        return nullptr;
24    }
25    SkString s = SkStringPrintf("P6\n%d %d\n255\n", src.width(), src.height());
26    auto result = SkData::MakeUninitialized(s.size() + 3 * src.width() * src.height());
27    uint8_t* ptr = static_cast<uint8_t*>(result->writable_data());
28    memcpy(ptr, s.c_str(), s.size());
29    ptr += s.size();
30    for (int y = 0; y < src.height(); ++y) {
31        for (int x = 0; x < src.height(); ++x) {
32            SkColor c = src.getColor(x, y);
33            *ptr++ = SkColorGetR(c);
34            *ptr++ = SkColorGetG(c);
35            *ptr++ = SkColorGetB(c);
36        }
37    }
38    return result;
39}
40
41SkBitmap ToBitmap(SkImage * img) {
42    SkBitmap bitmap;
43    (void)img->asLegacyBitmap(&bitmap, SkImage::kRO_LegacyBitmapMode);
44    return bitmap;
45}
46
47void draw(SkCanvas*) {
48    SkBitmap bitmap = ToBitmap(image.get());
49    sk_sp<SkData> data = Encode_PPM_B(bitmap.pixmap());
50    print_data(data.get(), "foo.ppm");
51}
52}  // END FIDDLE
53