[bug] Multiple fonts / Icon fonts broken since migration

[Geo5]

Hey,
using icon fonts (and also possibly the MultipleFonts example) seems to be broken since the migration to cimgui-go.

Below is the code example, which correctly displays icons on v0.7.0 but does not work on current master:

The minimal example uses https://github.com/juliettef/IconFontCppHeaders with forkawesome-webfont.ttf

I could not find any changes, which seemed meaningful to me to FontAtlasProcessor.go since v0.7.0, so maybe it has something to do with cimgui-go itself.

Code example

main.go

package main

import (
	iconFonts "github.com/juliettef/IconFontCppHeaders"

	g "github.com/AllenDang/giu"
)

var IconFont = iconFonts.IconsForkAwesome

func Icon(name string) string {
	ret, ok := IconFont.Icons[name]
	if !ok {
		panic(name + " icon not found")
	}
	return ret
}

func loop() {
	g.SingleWindow().Layout(
		g.Label("Content line"),
		g.Label("Content line "+Icon("Check")),
		g.Button("Normal button"),
		g.Button("Normal button"+Icon("Check")),
	)
}

func main() {
	wnd := g.NewMasterWindow("Multiple fonts and icons", 600, 400, g.MasterWindowFlagsNotResizable)
	// Change the default font to include icons
	g.Context.FontAtlas.SetDefaultFont("forkawesome-webfont.ttf", 20)
	wnd.Run(loop)
}

To Reproduce

1. Run the demo on master
2. Run the demo on v0.7.0

Version

master

OS

Linux

[gucio321]

GlyphRangesBuilder is broken. Refer AllenDang/cimgui-go#206

[gucio321]

upstream issue closed, @Geo5 there was a large change in the way how cimgui-go wraps imgui types. Could you check if this works now?

[Geo5]

It does not seem to fix anything

[gucio321]

Works since v0.8.0