[vert.glsl]

#version 130

in vec3 in_Position;
in vec2 in_TexCoord;
out vec2 pass_texcoord;

uniform mat4 u_projection;
uniform mat4 u_view;
uniform mat4 u_model;

void main()
{
    gl_Position = u_projection * u_view * u_model
                * vec4(in_Position, 1.0);
    pass_texcoord = in_TexCoord;
}

[frag.glsl]

#version 130

#if defined GL_ES
precision mediump float;
#endif

in vec2 pass_texcoord;
out vec4 out_color;

uniform sampler2D u_texture;
uniform vec2 u_texsize;

void main()
{
    vec4 col = texture2D(u_texture, pass_texcoord);
    if (col.a == 0.0)
        discard;
    out_color = col;
}