Emoji TTF font setting not working

[noraj]

Describe the bug

Emoji TTF font setting not working.

To Reproduce

Whatever the TTF font I use from the env. var. or with the option, emojis are not displayed.

# set emoji font in env var
export TEXTIMG_EMOJI_FONT_FILE=/usr/share/fonts/noto/NotoColorEmoji.ttf
export TEXTIMG_EMOJI_FONT_FILE=/usr/share/fonts/joypixels/JoyPixels.ttf
# from env var
echo あ😃a👍！👀ん👄 | ./textimg -i -o emoji.png
# explicit option
echo あ😃a👍！👀ん👄 | ./textimg -i -e /usr/share/fonts/joypixels/JoyPixels.ttf -o emoji.png

Output image:

Expected behavior

Emoji displayed as in the documentation https://github.com/jiro4989/textimg#emoji-font-ttf.

Environment (please complete the following information)

• OS: ArchLinux
• Version: textimg 3.1.7

[noraj]

Emoji image variant works however.

git clone https://github.com/googlefonts/noto-emoji /tmp/noto-emoji
export TEXTIMG_EMOJI_DIR=/tmp/noto-emoji/png/128
echo あ😃a👍！👀ん👄 | ./textimg -o emoji.png

[jiro4989]

I don't have an Arch Linux environment, so I can't test it. Solve the problem yourself.

Probably, I think that the JoyPixels font does not support Japanese.

/usr/share/fonts/joypixels/JoyPixels.ttf

[jiro4989]

You can draw Japanese with these fonts.

textimg/config/config.go

Lines 62 to 69 in 80e940a

	const (
	defaultWindowsFont = `C:\Windows\Fonts\msgothic.ttc`
	defaultDarwinFont = "/System/Library/Fonts/AppleSDGothicNeo.ttc"
	defaultIOSFont = "/System/Library/Fonts/Core/AppleSDGothicNeo.ttc"
	defaultAndroidFont = "/system/fonts/NotoSansCJK-Regular.ttc"
	defaultLinuxFont1 = "/usr/share/fonts/opentype/noto/NotoSansCJK-Regular.ttc"
	defaultLinuxFont2 = "/usr/share/fonts/noto-cjk/NotoSansCJK-Regular.ttc"
	)

[noraj]

I don't have an Arch Linux environment, so I can't test it. Solve the problem yourself.

I don't think it's related to the OS flavor.

Probably, I think that the JoyPixels font does not support Japanese.

Japanese character not displayed is expected but the emoji should be.

[jiro4989]

If you want to draw Japanese, set TEXTIMG_FONT_FILE to a font that supports Japanese.
TEXTIMG_FONT_FILE is used for drawing non-emoticons.

See: https://github.com/jiro4989/textimg#fonts

I don't think it's related to the OS flavor.

I don't know ArchLinux's font folder. I don't even know what fonts will be installed.

[noraj]

It's not about Japanese chars or ArchLinux. It's a bug in textimg where emoji font option is ignored!

$ wget https://github.com/jiro4989/textimg/releases/download/v3.1.8/textimg-linux-amd64.tar.gz
$ tar xaf textimg-linux-amd64.tar.gz
$ ls /usr/share/fonts/noto/NotoColorEmoji.ttf
/usr/share/fonts/noto/NotoColorEmoji.ttf
$ export TEXTIMG_EMOJI_FONT_FILE=/usr/share/fonts/noto/NotoColorEmoji.ttf
# from env var
$ echo 😃👍👀👄 | ./textimg -i -o emoji.png
2023/02/11 04:07:42 textimg [WARN] /home/runner/work/textimg/textimg/config/face.go:42 /usr/share/fonts/noto-cjk/NotoSansCJK-Regular.ttc is not found. please set font path with `-f` option

# explicit option
$ echo 😃👍👀👄 | ./textimg -i -e /usr/share/fonts/joypixels/JoyPixels.ttf -o emoji.png       
2023/02/11 04:09:38 textimg [WARN] /home/runner/work/textimg/textimg/config/face.go:42 /usr/share/fonts/noto-cjk/NotoSansCJK-Regular.ttc is not found. please set font path with `-f` option

[jiro4989]

See WARN message.

2023/02/11 04:07:42 textimg [WARN] /home/runner/work/textimg/textimg/config/face.go:42 /usr/share/fonts/noto-cjk/NotoSansCJK-Regular.ttc is not found. please set font path with -f option

[jiro4989]

This is what happens when I run

$ textimg あいうえお😀 -f /usr/share/fonts/opentype/noto/NotoSansCJK-Regular.ttc -o /images/z.png

$ export TEXTIMG_FONT_FILE='/usr/share/fonts/opentype/noto/NotoSansCJK-Regular.ttc'
$ textimg あいうえお😀 -o /images/z.png

export TEXTIMG_EMOJI_FONT_FILE=/usr/share/fonts/truetype/noto/NotoColorEmoji.ttf
export TEXTIMG_FONT_FILE='/usr/share/fonts/opentype/noto/NotoSansCJK-Regular.ttc'
textimg あいうえお😀 -o /images/z.png

$ textimg あいうえお -f zzz.ttf -o /images/z.png
2023/02/11 05:43:36 textimg [WARN] /root/go/pkg/mod/github.com/jiro4989/textimg/v3@v3.1.8/config/face.go:42 zzz.ttf is not found. please set font path with `-f` option

[jiro4989]

textimg uses two fonts to draw characters.

1. TEXTIMG_FONT_FILE
2. TEXTIMG_EMOJI_FONT_FILE

In your environment, the font specified by default in TEXTIMG_FONT_FILE does not exist, so Japanese cannot be drawn.