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_ascii, 256, 256, true, 4) {
5void dump_txt(const SkData* data, const char* name) {
6    if (data) {
7        SkDebugf("\ncat > %s << EOF\n", name);
8        size_t s = data->size();
9        const char* d = (const char*)data->bytes();
10        while (s > 0) {
11            int l = (int)std::min(s, (size_t)1024);
12            SkDebugf("%.*s", l, d);
13            s -= l;
14            d += l;
15        }
16        SkDebugf("\nEOF\n\n");
17    }
18}
19
20sk_sp<SkData> Encode_PPM_A(const SkPixmap& src) {
21    if (src.width() <= 0 || src.height() <= 0 || !src.addr() ||
22        src.colorType() == kUnknown_SkColorType) {
23        return nullptr;
24    }
25    SkDynamicMemoryWStream buf;
26    SkString s = SkStringPrintf("P3\n%d %d\n255\n", src.width(), src.height());
27    buf.write(s.c_str(), s.size());
28    for (int y = 0; y < src.height(); ++y) {
29        for (int x = 0; x < src.height(); ++x) {
30            char buffer[13];
31            SkColor c = src.getColor(x, y);
32            int n = snprintf(buffer, sizeof(buffer), "%d %d %d\n", SkColorGetR(c),
33                             SkColorGetG(c), SkColorGetB(c));
34            if (n < 6 || n + 1 > (int)sizeof(buffer)) {
35                return nullptr;
36            }
37            buf.write(buffer, n);
38        }
39    }
40    return buf.detachAsData();
41}
42
43SkBitmap ToBitmap(SkImage * img) {
44    SkBitmap bitmap;
45    (void)img->asLegacyBitmap(&bitmap, SkImage::kRO_LegacyBitmapMode);
46    return bitmap;
47}
48
49void draw(SkCanvas*) {
50    SkBitmap bitmap = ToBitmap(image.get());
51    sk_sp<SkData> data = Encode_PPM_A(bitmap.pixmap());
52    dump_txt(data.get(), "fooa.ppm");
53}
54}  // END FIDDLE
55