Adapting for web

resources/shaders/text2d.vertex

@@ -1,12 +1,11 @@
-#version 330 core
-in vec2 vPosition;
-in vec2 vTexCoord;
+attribute vec2 vPosition;
+attribute vec2 vTexCoord;
 
-out vec2 TexCoord;
+varying vec2 TexCoord;
 
 uniform mat4 uProjection;
 
 void main() {
     TexCoord = vTexCoord;
-    gl_Position = uProjection * vec4(vPosition.xy, 0.0, 1.0);
+    gl_Position = uProjection * vec4(vPosition, 0.0, 1.0);
 }