CloudinaryがテキストオーバーレイでサポートしているGoogle Fontを調べてみた

#困ったこと
CloudinaryのテキストオーバーレイがGoogleのウェブフォントをサポートしていると書いてあったのですが、日本語フォントを指定してみたのですが、ことごとく400エラーが返ってきてしまいました。Googleフォントのうち、どのフォントが使えるのか、全部のフォントを総当たりして確認してみました。

2018年12月8日時点で904フォント登録されてますが、日本語が使えるのは12フォントだけです。
https://fonts.google.com/?subset=japanese

1. Kosugi
2. [Kosugi Maru](https://fonts.google.com/specimen/Kosugi Maru)
3. [M PLUS 1p](https://fonts.google.com/specimen/M PLUS 1p)
4. [M PLUS Rounded 1c](https://fonts.google.com/specimen/M PLUS Rounded 1c)
5. [Noto Sans JP](https://fonts.google.com/specimen/Noto Sans JP)
6. [Noto Sans SC](https://fonts.google.com/specimen/Noto Sans SC)
7. [Noto Sans TC](https://fonts.google.com/specimen/Noto Sans TC)
8. [Noto Serif JP](https://fonts.google.com/specimen/Noto Serif JP)
9. [Noto Serif SC](https://fonts.google.com/specimen/Noto Serif SC)
10. [Noto Serif TC](https://fonts.google.com/specimen/Noto Serif TC)
11. [Sawarabi Gothic](https://fonts.google.com/specimen/Sawarabi Gothic)
12. [Sawarabi Mincho](https://fonts.google.com/specimen/Sawarabi Mincho)

2020年1月4日時点で977フォント登録されてますが、日本語が使えるのは8フォントだけです。
https://fonts.google.com/?subset=japanese

1. Kosugi
2. [Kosugi Maru](https://fonts.google.com/specimen/Kosugi Maru)
3. [M PLUS 1p](https://fonts.google.com/specimen/M PLUS 1p)
4. [M PLUS Rounded 1c](https://fonts.google.com/specimen/M PLUS Rounded 1c)
5. [Noto Sans JP](https://fonts.google.com/specimen/Noto Sans JP)
6. [Noto Serif JP](https://fonts.google.com/specimen/Noto Serif JP)
7. [Sawarabi Gothic](https://fonts.google.com/specimen/Sawarabi Gothic)
8. [Sawarabi Mincho](https://fonts.google.com/specimen/Sawarabi Mincho)

結果から言うと、CloudinaryのTextオーバーレイで使えるフォントはSawarabi GothicとSawarabi Minchoが使えました。他はNGでした。

Sawarabi Gothic

Sawarabi Mincho

#使ったもの
PHP
Cloudinary
google fonts (https://fonts.google.com/)
developer API (https://developers.google.com/fonts/docs/developer_api)

#やったこと

1. google APIでfont familyの一覧を取り出し
2. CloudinaryのURLを組み立ててリクエストを投げて
3. HTTPのステータスコードを取り出す

##コード
cloud_nameとlimitは適当に変えてください。

<?php
$google_api_token = 'xxx-yyy';
$font_api_url = 'https://www.googleapis.com/webfonts/v1/webfonts?key=' . $google_api_token;
$cloud_name ='demo';
$limit = 100;

$font_json = file_get_contents($font_api_url);
$font_list = json_decode($font_json, true);

$curl = curl_init();
curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'GET');
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false); 
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HEADER, true);

$result =[
    '200'=>[],'400'=>[],
];

foreach($font_list['items']??[] as $n=>$font){
    $font_family = $font['family'];
    echo ($n+1).'/'.count($font_list['items']) . " " . $font_family . PHP_EOL;

    $cloudinary_url = "https://res.cloudinary.com/$cloud_name/l_text:". 
        rawurlencode($font_family).
        '_40_center:ABC,co_rgb:ffffff/sample.jpg';

    echo $cloudinary_url . PHP_EOL;

    curl_setopt($curl, CURLOPT_URL, $cloudinary_url);

    $response = curl_exec($curl);
    $code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
    $header_size = curl_getinfo($curl, CURLINFO_HEADER_SIZE); 
    $header = substr($response, 0, $header_size);

    echo $code . ' ' . $font_family . PHP_EOL;
    // echo $header . PHP_EOL;
    
    if( preg_match('/x-cld-error: (.*)/i', $header, $_)){
        echo $_[1] . PHP_EOL;
    }

    $result[$code][]=$font_family;

    if( $n+1 >= $limit ){
        break;
    }
    echo PHP_EOL;
}

var_dump($result['200']);
var_dump($result['400']);

echo "end of batch";

##結果
907フォント中、71フォントが使えませんでした。NotoとかM＋が使えないのが残念です。

1. [Bai Jamjuree](https://fonts.google.com/specimen/Bai Jamjuree)
2. [Black And White Picture](https://fonts.google.com/specimen/Black And White Picture)
3. [Black Han Sans](https://fonts.google.com/specimen/Black Han Sans)
4. [Cantora One](https://fonts.google.com/specimen/Cantora One)
5. [Chakra Petch](https://fonts.google.com/specimen/Chakra Petch)
6. Charmonman
7. [Cute Font](https://fonts.google.com/specimen/Cute Font)
8. [David Libre](https://fonts.google.com/specimen/David Libre)
9. [Do Hyeon](https://fonts.google.com/specimen/Do Hyeon)
10. Dokdo
11. [East Sea Dokdo](https://fonts.google.com/specimen/East Sea Dokdo)
12. Fahkwang
13. [Fjord One](https://fonts.google.com/specimen/Fjord One)
14. Gaegu
15. [Gamja Flower](https://fonts.google.com/specimen/Gamja Flower)
16. [Gothic A1](https://fonts.google.com/specimen/Gothic A1)
17. Gugi
18. [Hammersmith One](https://fonts.google.com/specimen/Hammersmith One)
19. [Headland One](https://fonts.google.com/specimen/Headland One)
20. [Hi Melody](https://fonts.google.com/specimen/Hi Melody)
21. [IBM Plex Mono](https://fonts.google.com/specimen/IBM Plex Mono)
22. [IBM Plex Sans](https://fonts.google.com/specimen/IBM Plex Sans)
23. [IBM Plex Sans Condensed](https://fonts.google.com/specimen/IBM Plex Sans Condensed)
24. [IBM Plex Serif](https://fonts.google.com/specimen/IBM Plex Serif)
25. Jua
26. K2D
27. Kantumruy
28. [Kirang Haerang](https://fonts.google.com/specimen/Kirang Haerang)
29. KoHo
30. Kodchasan
31. Kosugi
32. [Kosugi Maru](https://fonts.google.com/specimen/Kosugi Maru)
33. Krub
34. [Kumar One Outline](https://fonts.google.com/specimen/Kumar One Outline)
35. [M PLUS 1p](https://fonts.google.com/specimen/M PLUS 1p)
36. [M PLUS Rounded 1c](https://fonts.google.com/specimen/M PLUS Rounded 1c)
37. Mali
38. [Markazi Text](https://fonts.google.com/specimen/Markazi Text)
39. Moulpali
40. [Nanum Gothic](https://fonts.google.com/specimen/Nanum Gothic)
41. [Nanum Gothic Coding](https://fonts.google.com/specimen/Nanum Gothic Coding)
42. [Nanum Myeongjo](https://fonts.google.com/specimen/Nanum Myeongjo)
43. [Nanum Pen Script](https://fonts.google.com/specimen/Nanum Pen Script)
44. Niramit
45. Nokora
46. Notable
47. [Noto Sans JP](https://fonts.google.com/specimen/Noto Sans JP)
48. [Noto Sans KR](https://fonts.google.com/specimen/Noto Sans KR)
49. [Noto Sans SC](https://fonts.google.com/specimen/Noto Sans SC)
50. [Noto Sans TC](https://fonts.google.com/specimen/Noto Sans TC)
51. [Noto Serif JP](https://fonts.google.com/specimen/Noto Serif JP)
52. [Noto Serif KR](https://fonts.google.com/specimen/Noto Serif KR)
53. [Noto Serif SC](https://fonts.google.com/specimen/Noto Serif SC)
54. [Noto Serif TC](https://fonts.google.com/specimen/Noto Serif TC)
55. [Odor Mean Chey](https://fonts.google.com/specimen/Odor Mean Chey)
56. [Poor Story](https://fonts.google.com/specimen/Poor Story)
57. Preahvihear
58. [Raleway Dots](https://fonts.google.com/specimen/Raleway Dots)
59. [Saira Extra Condensed](https://fonts.google.com/specimen/Saira Extra Condensed)
60. [Saira Semi Condensed](https://fonts.google.com/specimen/Saira Semi Condensed)
61. [Sirin Stencil](https://fonts.google.com/specimen/Sirin Stencil)
62. [Song Myung](https://fonts.google.com/specimen/Song Myung)
63. Srisakdi
64. Stylish
65. [Sue Ellen Francisco](https://fonts.google.com/specimen/Sue Ellen Francisco)
66. Sunflower
67. [Supermercado One](https://fonts.google.com/specimen/Supermercado One)
68. Suwannaphum
69. Tajawal
70. Vidaloka
71. [Yeon Sung](https://fonts.google.com/specimen/Yeon Sung)

2020年1月4日時点で141フォントがNGです。

#参考資料
What is the list of supported fonts for text overlay transformation?
https://support.cloudinary.com/hc/en-us/articles/203352832