geng-egui 0.11.0

geng egui integration
Documentation 
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varying vec4 v_color;
varying vec2 v_vt;

#ifdef VERTEX_SHADER
attribute vec2 a_pos;
attribute vec2 a_vt;
attribute vec4 a_color;
uniform ivec2 u_framebuffer_size;
uniform mat3 u_projection_matrix;
uniform mat3 u_view_matrix;
uniform mat3 u_model_matrix;
void main() {
    v_color = a_color;
    v_vt = a_vt;
    vec3 pos = u_projection_matrix * u_view_matrix * u_model_matrix * vec3(a_pos, 1.0);
    gl_Position = vec4(pos.xy, 0.0, pos.z);
}
#endif

#ifdef FRAGMENT_SHADER
uniform vec4 u_color;
uniform sampler2D u_texture;
void main() {
    gl_FragColor = v_color * u_color * texture2D(u_texture, v_vt);
}
#endif