Could not change fonts

[genleung]

I try to load a CJK font after gui.setup() :

void ofApp::setup()
{
ofSetLogLevel(OF_LOG_VERBOSE);
//required call
gui.setup();
ImGui::GetIO().MouseDrawCursor = false;
// Load Fonts
ImFontConfig font_config;
ImGuiIO& io = ImGui::GetIO();
//ImGui::PopFont();
if(io.Fonts->AddFontFromFileTTF("notosans.otf", 15.0f, &font_config, io.Fonts
->GetGlyphRangesChinese())){
std::cout<<"********* Font loaded!"<<std::endl;
}else{
std::cout<<"xxxxxxxxx Font failed to load!"<<std::endl;
}
// ......................

It seems that the font could be loaded, but the whole window texts remain the same as the original look. These code lines actually work well in the ImGui opengl demo examples.

And I try to load fonts in EngineGLFW.cpp:

bool EngineGLFW::createFontsTexture()
{
// Build texture atlas
ImGuiIO& io = ImGui::GetIO();
unsigned char* pixels;
int width, height;
io.Fonts->AddFontFromFileTTF("notosans.otf", 15.0f, &font_config, io.Fonts
->GetGlyphRangesChinese())
io.Fonts->GetTexDataAsRGBA32(&pixels, &width, &height);
// .............

This time, it got crashed by a segmentation fault.

I also tried to load another Latin-based font like ProggyClean.ttf companied with ImGui, and the problem remains the same.

[sphaero]

I can confirm this bug

[sphaero]

A workaround is to build the font before setup()

ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO();
io.Fonts->AddFontDefault();
io.Fonts->AddFontFromFileTTF("Roboto-Medium.ttf", 16.0f);
gui.setup();

[xarthurx]

yes, font loading need to be done before setting up the gui.
Confirm this issue also.

[steeley]

Tried this, and been through all the docs I can find and cannot load any fonts.
Crashes because it can';t find or load font??? Hmmm...

Would love too know how you get fonts to load.

------------------ this didn't work:

A workaround is to build the font before setup()

ImGui::CreateContext();
ImGuiIO& io = ImGui::GetIO();
io.Fonts->AddFontDefault();
io.Fonts->AddFontFromFileTTF("Roboto-Medium.ttf", 16.0f);
gui.setup();

[tom-leamon]

I'm still experiencing this issue. I tried @sphaero's workaround, but I can't change from the default monospace font. Is this still a known issue?

[Daandelange]

It should work like charm in the develop branch, legacy has not evolved for a while ;)