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"Properly" scale ImGui font by reloading font with scaled size

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This commit is contained in:
Daniel Gibson 2024-06-02 16:50:28 +02:00
parent cb5d988058
commit 7aa6c6a70f
1 changed files with 13 additions and 9 deletions
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22
neo/sys/sys_imgui.cpp
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@ -203,11 +203,6 @@ float GetScale()
void SetScale( float scale )
{
ImGuiIO& io = ImGui::GetIO();
float realScale = (scale < 0.0f) ? GetDefaultScale() : scale;
io.FontGlobalScale = realScale;
// TODO: could instead set fontsize to 18.0f * scale
// (io.Fonts->ClearFonts() and then add again with new size - but must be done before NewFrame() / after EndFrame())
imgui_scale.SetFloat( scale );
}
@ -240,11 +235,8 @@ bool Init(void* _sdlWindow, void* sdlGlContext)
ImGui::StyleColorsDark();
}
ImFontConfig fontCfg;
strcpy(fontCfg.Name, "ProggyVector");
ImFont* font = io.Fonts->AddFontFromMemoryCompressedTTF(ProggyVector_compressed_data, ProggyVector_compressed_size, 18.0f, nullptr);
SetScale( GetScale() );
imgui_scale.SetModified(); // so NewFrame() will load the scaled font
// Setup Platform/Renderer backends
if ( ! ImGui_ImplSDL2_InitForOpenGL( sdlWindow, sdlGlContext ) ) {
@ -322,6 +314,18 @@ void NewFrame()
framesAfterAllWindowsClosed = 0;
}
if( imgui_scale.IsModified() ) {
imgui_scale.ClearModified();
ImGuiIO& io = ImGui::GetIO();
io.Fonts->Clear();
ImGui_ImplOpenGL2_DestroyFontsTexture();
ImFontConfig fontCfg;
strcpy( fontCfg.Name, "ProggyVector" );
float fontSize = 18.0f * GetScale();
float fontSizeInt = roundf( fontSize ); // font sizes are supposed to be rounded to integers
ImFont* font = io.Fonts->AddFontFromMemoryCompressedTTF(ProggyVector_compressed_data, ProggyVector_compressed_size, fontSizeInt, nullptr);
}
// Start the Dear ImGui frame
ImGui_ImplOpenGL2_NewFrame();