Attempt to Display Non Latin Characters

[Talbe1]

Hello,

I'm trying to display some non Latin characters (in this case Hebrew) in an experiment application, but I am unable to specify the proper characters range.

from imgui_bundle import immapp, imgui


def gui():
    imgui.text("Hello")
    imgui.text("אבגד")


def add_font():
    ranges_builder = imgui.ImFontGlyphRangesBuilder()
    ranges_builder.add_text("אבגדהוזחטיכלמנסעפקרשת")    # Some Hebrew characters

    chars_range = imgui.ImVector_uint()
    ranges_builder.build_ranges(chars_range)    # Now that the required character ranges were built, where do I send them to?
    
    imgui.get_io().fonts.add_font_default()
    imgui.get_io().fonts.add_font_from_file_ttf(r"C:\Users\talba\Documents\arial.ttf", 24)  # Function missing the ranges argument?


def main():
    runner_params = immapp.RunnerParams()
    runner_params.ini_filename = "foo.ini"
    runner_params.callbacks.show_gui = gui
    runner_params.callbacks.post_init = add_font

    immapp.run(runner_params=runner_params)


if __name__ == "__main__":
    main()

I suspect my issue stems from what seems to be a slightly different Python function compared to the native C++ version.
Although I am likely missing something, any help would be greatly appreciated.
(ImGui Bundle API)

(Native ImGui API)
Note that the ImGui Bundle documentation shows the original function is called **_**AddFontFromFileTTF and not AddFontFromFileTTF for some odd reason.

[pthom]

Since imgui v1.92, there is no need to specify ranges when loading fonts.
Also, fonts can be used at any size (the size at which you load the font is actually not that useful: you can change the size whenever you call push_font.

For your example to work, you need to use a font that is able to display hebrew, such as https://fonts.google.com/noto/specimen/Noto+Sans+Hebrew for example

And then this code can work:

from imgui_bundle import immapp, imgui

font_default: imgui.ImFont
font_hebrew: imgui.ImFont


def gui():
    imgui.push_font(font_default, 12)
    imgui.text("Hello")
    imgui.pop_font()
    imgui.push_font(font_hebrew, 24)
    imgui.text("אבגד")
    imgui.pop_font()


def add_font():
    global font_hebrew, font_default
    # No need to specify ranges, since imgui v1.92
    font_default = imgui.get_io().fonts.add_font_default()
    font_hebrew = imgui.get_io().fonts.add_font_from_file_ttf(r"/Volumes/ramdisk/NotoSansHebrew-Black.ttf", 24)  # Function missing the ranges argument?


def main():
    runner_params = immapp.RunnerParams()
    runner_params.callbacks.show_gui = gui

    # runner_params.callbacks.post_init = add_font
    runner_params.callbacks.load_additional_fonts = add_font  # use this callback to add fonts

    immapp.run(runner_params=runner_params)


if __name__ == "__main__":
    main()

[Talbe1]

I was a bit confused, but now it works like a charm, thank you very much for the clarification :)