organicmaps-tmp/shaders/GL/screen_quad.vsh.glsl

attribute vec2 a_pos;
attribute vec2 a_tcoord;

varying vec2 v_colorTexCoords;

void main()
{
  v_colorTexCoords = a_tcoord;
  gl_Position = vec4(a_pos, 0.0, 1.0);
}