ICEY/Assets/GameAssets/Games/icey/Scripts/RenderHeads/Media/AVProVideo/DisplayBackground.cs

#if UNITY_5_4_OR_NEWER || (UNITY_5 && !UNITY_5_0)
#define UNITY_HELPATTRIB
#endif

using UnityEngine;

//-----------------------------------------------------------------------------
// Copyright 2015-2020 RenderHeads Ltd.  All rights reserved.
//-----------------------------------------------------------------------------


namespace RenderHeads.Media.AVProVideo
{
    /// <summary>
    /// Draws video over the whole background using the special "background" tag on the shader.
    /// Useful for augmented reality.
    /// NOTE: This doesn't work with the camera clear mode set to 'skybox'
    /// </summary>
    [AddComponentMenu("AVPro Video/Display Background", 200)]
#if UNITY_HELPATTRIB
    [HelpURL("http://renderheads.com/products/avpro-video/")]
#endif
    [ExecuteInEditMode]
    public class DisplayBackground : MonoBehaviour
    {
        public IMediaProducer _source;

        public Texture2D _texture;
        public Material _material;

        //-------------------------------------------------------------------------

        void OnRenderObject()
        {
            if (_material == null || _texture == null)
                return;

            Vector4 uv = new Vector4(0f, 0f, 1f, 1f);
            _material.SetPass(0);
            GL.PushMatrix();
            GL.LoadOrtho();
            GL.Begin(GL.QUADS);

            GL.TexCoord2(uv.x, uv.y);
            GL.Vertex3(0.0f, 0.0f, 0.1f);

            GL.TexCoord2(uv.z, uv.y);
            GL.Vertex3(1.0f, 0.0f, 0.1f);

            GL.TexCoord2(uv.z, uv.w);
            GL.Vertex3(1.0f, 1.0f, 0.1f);

            GL.TexCoord2(uv.x, uv.w);
            GL.Vertex3(0.0f, 1.0f, 0.1f);

            GL.End();
            GL.PopMatrix();
        }
    }
}