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"
4 REG_FIDDLE(SkImage_to_PPM_ascii, 256, 256, true, 4) {
dump_txt(const SkData * data,const char * name)5 void 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
Encode_PPM_A(const SkPixmap & src)20 sk_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
ToBitmap(SkImage * img)43 SkBitmap ToBitmap(SkImage * img) {
44 SkBitmap bitmap;
45 (void)img->asLegacyBitmap(&bitmap, SkImage::kRO_LegacyBitmapMode);
46 return bitmap;
47 }
48
draw(SkCanvas *)49 void 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