graph-layout/vendor/gioui.org/shader/gio/zcover.vert.0.glsl150

#version 150

struct m3x2
{
    vec3 r0;
    vec3 r1;
};

struct Block
{
    vec4 transform;
    vec4 uvCoverTransform;
    vec4 uvTransformR1;
    vec4 uvTransformR2;
    float fbo;
};

uniform Block _block;

in vec2 pos;
out vec2 vUV;
in vec2 uv;
out vec2 vCoverUV;

vec3 transform3x2(m3x2 t, vec3 v)
{
    return vec3(dot(t.r0, v), dot(t.r1, v), dot(vec3(0.0, 0.0, 1.0), v));
}

void main()
{
    vec2 p = vec2((pos * _block.transform.xy) + _block.transform.zw);
    if (_block.fbo != 0.0)
    {
        m3x2 param = m3x2(vec3(1.0, 0.0, 0.0), vec3(0.0, 1.0, 0.0));
        vec3 param_1 = vec3(p, 0.0);
        gl_Position = vec4(transform3x2(param, param_1), 1.0);
    }
    else
    {
        m3x2 param_2 = m3x2(vec3(1.0, 0.0, 0.0), vec3(0.0, -1.0, 0.0));
        vec3 param_3 = vec3(p, 0.0);
        gl_Position = vec4(transform3x2(param_2, param_3), 1.0);
    }
    m3x2 param_4 = m3x2(_block.uvTransformR1.xyz, _block.uvTransformR2.xyz);
    vec3 param_5 = vec3(uv, 1.0);
    vUV = transform3x2(param_4, param_5).xy;
    vec3 uv3 = vec3(uv, 1.0);
    vCoverUV = ((uv3 * vec3(_block.uvCoverTransform.xy, 1.0)) + vec3(_block.uvCoverTransform.zw, 0.0)).xy;
}