go-gl / gltext Goto Github PK

There is an occasional memory corruption which cause an application using gltext to crash when loading a truetype font.

It can be reproduce it by running the gltext example at https://github.com/go-gl/examples/blob/master/gltext/truetype/main.go with DejaVuSans font instead, usually located at "/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf" in ubuntu systems. It doesn't always happen, you may need to run it a couple of times until the problem occurs.

Some of the functions in misc.go may be useful to others and should therefore be moved to go-gl/glh.

This repository is made by enthusiasts. Unfortunately it's not ready-to-ship code, and may require some expertise to use.

We should add some good examples. Unfortunately, neither me nor @jteeuwen (AFAIK) have time to work on this at the moment, so help is welcomed!

Feel free to ping this thread on a frequency less than once/month to show your interest.

Supercedes #18 #19 #20 go-gl/gl#58

Are there any plans to refresh this package to work with the new go-gl ecosystem? Can I help somehow? It depends for example on go-gl/glh which was moved to go-gl-legacy. Anybody's got an idea how to make this package working again?

Thank you.

Hi im using gltext in my little project and i have a errorwhile loading font from "./font/Roboto-Light.ttf" i getting GL error 1282 i can't fix it

	fd, err := os.Open(file)
	if err != nil {
		return nil, err
	}
	defer fd.Close()

	return gltext.LoadTruetype(fd, scale, 32, 127, gltext.LeftToRight)
}```

```func initFonts() {
	var err error
	for i := range fonts {
		fmt.Printf("[%d] [LOADING] Loading font of scale %d\n", i, int32(12+i))
		fonts[i], err = loadFont("./font/Roboto-Light.ttf", int32(12+i))
		if err != nil {
			log.Printf("failed while init fonts: %v", err)
			return
		}
		defer fonts[i].Release()
		fmt.Printf("[%d] [OK] successfully loaded font of scale %d\n", i, int32(12+i))
	}
}```

I wonder if there is any interest to add support for OpenGL ES 2 via interfaces/build constraints. Thanks!

We did discuss this on IRC briefly, what do you think?

As in go-gl-legacy/glh#41, freetype has a GPL license. As I understand it, our license is compatible with that, but anyone shipping binaries would have to do so under the terms of the GPL (as well as the BSD terms). Which is not ideal.

So we need to find a way out of this mess. Help is welcomed. Some starting points:

• Re-license this project to GPL (not my favourite)
• Build an interface which uses harfbuzz or otherwise achieve text rendering without freetype

/cc @andrebq @jteeuwen

I would love to try this library out, however I am having trouble figuring out how to use this library without any documentation or examples to hack away at....