Sokol imgui load font about sokol-samples HOT 2 CLOSED

I have two examples where a custom font is used, both have the font data embedded in the program though, not loading it from a file (as that wouldn't work in browsers).

See here for an example that just replaces the default font with a TTF font:

And this example uses the default font, but adds an additional icon font:

https://github.com/floooh/v6502r/blob/f2185ca6ccf0ce18ea3258e8ba163027abeefa0d/src/ui.cc#L46-L87

You need to set .no_default_font = true when calling simgui_setup(), so that the font isn't already constructed in the call to simgui_setup(), instead this must be done completely by your own code.

So the important steps are:

• call simgui_setup with .no_default_font
• add your own fonts to ImGui's GetIO().Fonts object
• let ImGui rasterize the font, and get the pixel data and dimensions (

  sokol-samples/sapp/imgui-highdpi-sapp.cc

  Line 53 in 6e5d16b

  io.Fonts->GetTexDataAsRGBA32(&font_pixels, &font_width, &font_height);

  )
• create a sokol-gfx texture from that data and use the returned sg_image handle-id as ImGui's TexID:

  sokol-samples/sapp/imgui-highdpi-sapp.cc

  Lines 54 to 64 in 6e5d16b

  	sg_image_desc img_desc = { };
  	img_desc.width = font_width;
  	img_desc.height = font_height;
  	img_desc.pixel_format = SG_PIXELFORMAT_RGBA8;
  	img_desc.wrap_u = SG_WRAP_CLAMP_TO_EDGE;
  	img_desc.wrap_v = SG_WRAP_CLAMP_TO_EDGE;
  	img_desc.min_filter = SG_FILTER_LINEAR;
  	img_desc.mag_filter = SG_FILTER_LINEAR;
  	img_desc.content.subimage[0][0].ptr = font_pixels;
  	img_desc.content.subimage[0][0].size = font_width * font_height * 4;
  	io.Fonts->TexID = (ImTextureID)(uintptr_t) sg_make_image(&img_desc).id;

I haven't used PushFont/PopFont so far though, but with the procedure above to create the custom font, this should work too.

from sokol-samples.

It works, thank you very much @floooh ! Did not know that I need to create an atlas for it to work:)

from sokol-samples.