dev-harbour / template-bdf

Template-BDF: A Lightweight BDF Font Renderer in OpenGL

Template-BDF: A Lightweight BDF Font Renderer in OpenGL

Template-BDF is a lightweight and efficient font rendering library using the 'Glyph Bitmap Distribution Format' (BDF). It is designed to enable easy and fast display of bitmap fonts in applications utilizing OpenGL and GLFW.

Getting Started

For more info see getting started.

Example

#include "bdf.h"

int main()
{
   const char *text[] = {
      "",
      "Mathematics and sciences:",
      "",
      "  ∮ E⋅da = Q,  n → ∞, ∑ f(i) = ∏ g(i),      ⎧⎡⎛┌─────┐⎞⎤⎫",
      "                                            ⎪⎢⎜│a²+b³ ⎟⎥⎪",
      "  ∀x∈ℝ: ⌈x⌉ = −⌊−x⌋, α ∧ ¬β = ¬(¬α ∨ β),    ⎪⎢⎜│───── ⎟⎥⎪",
      "                                            ⎪⎢⎜⎷ c₈   ⎟⎥⎪",
      "  ℕ ⊆ ℕ₀ ⊂ ℤ ⊂ ℚ ⊂ ℝ ⊂ ℂ,                   ⎨⎢⎜       ⎟⎥⎬",
      "                                            ⎪⎢⎜ ∞     ⎟⎥⎪",
      "  ⊥ < a ≠ b ≡ c ≤ d ≪ ⊤ ⇒ (⟦A⟧ ⇔ ⟪B⟫),      ⎪⎢⎜ ⎲     ⎟⎥⎪",
      "                                            ⎪⎢⎜ ⎳aⁱ-bⁱ⎟⎥⎪",
      "  2H₂ + O₂ ⇌ 2H₂O, R = 4.7 kΩ, ⌀ 200 mm     ⎩⎣⎝i=1    ⎠⎦⎭",
      "",
      "Linguistics and dictionaries:",
      "",
      "  ði ıntəˈnæʃənəl fəˈnɛtık əsoʊsiˈeıʃn",
      "  Y [ˈʏpsilɔn], Yen [jɛn], Yoga [ˈjoːgɑ]",
      "",
      "APL:",
      "",
      "  ((V⍳V)=⍳⍴V)/V←,V    ⌷←⍳→⍴∆∇⊃‾⍎⍕⌈"
   };

   int numLines = LEN( text );

   BDF *app = CreateWindow( 830, 450, "Test text" );

   LoadBDFFont( "../font/9x18.bdf" );

   Background( app, 0x2F3853 );

   while( ! MainLoop( app ) )
   {
      BEGINDRAWING( app );

         for( int i = 0; i < numLines; i++ )
         {
            DrawBDFText( 36, i * 18, text[ i ], 0x2F3853, 0xF1F1F1 );
         }

      ENDDRAWING( app );
      WaitEvents();
   }

   CloseAll( app );
}