text drawing using freetype

shaders/font_f.frag

@@ -0,0 +1,11 @@
+#version 330 core
+in vec2 TexCoords;
+out vec4 FragColor;
+
+uniform sampler2D text;
+uniform vec3 textColor;
+
+void main() {
+  vec4 sampled = vec4(1.0, 1.0, 1.0, texture(text, TexCoords).r);
+  FragColor = vec4(textColor, 1.0) * sampled;
+}

shaders/font_v.vert

@@ -0,0 +1,10 @@
+#version 330 core
+layout (location = 0) in vec4 vertex;
+
+out vec2 TexCoords;
+uniform mat4 transform;
+
+void main() {
+  gl_Position = transform * vec4(vertex.xy, 0.0, 1.0);
+  TexCoords = vertex.zw;
+}

shaders/grid_f.frag

@@ -47,3 +47,4 @@ void main()
         FragColor = vec4(240.f/255.f, 235.f/255.f, 227.f/255.f, 1.0);
     }
 }
+