genesis-3d_engine/Engine/script/runtimelibrary/RenderToTexture.cs

/****************************************************************************
Copyright (c) 2011-2013,WebJet Business Division,CYOU
 
http://www.genesis-3d.com.cn

Permission is hereby granted, free of charge, to any person obtaining a copy
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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****************************************************************************/
using System;
using System.Runtime.CompilerServices;
using ScriptRuntime;
namespace ScriptRuntime
{
    //copy from Engine\rendersystem\base\PixelFormat.h
    internal enum _PixelFormat : int
    {
        // begin common
        X8R8G8B8 = 0,
        R8G8B8,
        B8G8R8,
        B8G8R8A8,
        R8G8B8A8,
        A8B8G8R8,
        A8R8G8B8,
        R5G6B5,
        A1R5G5B5,
        A4R4G4B4,
        DXT1,
        DXT2,
        DXT3,
        DXT4,
        DXT5,
        R16F,                       // 16 bit float, red only
        G16R16F,                    // 32 bit float, 16 bit red, 16 bit green
        A16B16G16R16F,              // 64 bit float, 16 bit rgba each
        R32F,                       // 32 bit float, red only
        G32R32F,                    // 64 bit float, 32 bit red, 32 bit green
        A32B32G32R32F,              // 128 bit float, 32 bit rgba each
        A8,
        L8,
        L8A8,						//[2012/4/12 zhongdaohuan] mygui 用到的格式
        L16,
        G16R16,
        D24X8,
        D24S8,
        // end common   CommonCount

        // begin iPhone /  PowerVR
        PVRTC_RGB2,
        PVRTC_RGBA2,
        PVRTC_RGB4,
        PVRTC_RGBA4,
        // end iphone / PowerVR end   iOSCount

        //ETC
        ETC1_RGB8,

        NumPixelFormats,
        InvalidPixelFormat,
        DescPixelFormatsCount,	//	不调整NumPixelFormats和InvalidPixelFormat的顺序，以免引起BUG。用于像素格式描述的数组

        // 记录分块的标志位。 更改枚举之后，记得修改
        CommonCount = D24S8 + 1,
        iOSCount = PVRTC_RGBA4 + 1,
    };

    public enum PixelFormat : int
    {
        X8R8G8B8 = _PixelFormat.X8R8G8B8,
        R16F = _PixelFormat.R16F,
        G16R16F = _PixelFormat.G16R16F,
        A16B16G16R16F = _PixelFormat.A16B16G16R16F,
        R32F = _PixelFormat.R32F,
        G32R32F = _PixelFormat.G32R32F,
        A32B32G32R32F = _PixelFormat.A32B32G32R32F,

    }

    public enum ClearFlag
    {
        ClearColor = (1 << 0),
        ClearDepth = (1 << 1),
        ClearStencil = (1 << 2),
        ClearAll = ClearColor | ClearDepth | ClearStencil,
    };

    /// <summary>
    /// 渲染到纹理
    /// </summary>
    public class RenderToTexture : Texture
    {
        private RenderToTexture(DummyClass__ dummyObj)
        {

        }

        ~RenderToTexture()
        {
            ICall_RenderToTexture_Release(this);
        }

        /// <summary>
        /// 默认构造函数
        /// </summary>
        public RenderToTexture()
        {
            ICall_RenderToTexture_Bind(this);
        }

        /// <summary>
        /// 创建一个用户自定义的渲染到纹理
        /// </summary>
        /// <param name="width">渲染到纹理的宽度</param>
        /// <param name="height">渲染到纹理的高度</param>
        /// <param name="format">渲染到纹理的格式</param>
        /// <param name="flag">渲染到纹理的渲染标志</param>
        /// <param name="color">渲染到纹理的颜色</param>
        /// <param name="useDepth">渲染到纹理是否使用深度</param>
        /// <param name="screenRatio">渲染到纹理的纵横比</param>
        public void Setup(int width, int height, PixelFormat format, ClearFlag flag, ref Vector4 color, bool useDepth, float screenRatio)
        {
            ICall_RenderToTexture_Setup(this, width, height,(int)format,(uint)flag, ref color,useDepth,screenRatio,0,0,0,0,0);
        }

        /// <summary>
        /// 创建一个用户自定义的渲染到纹理
        /// </summary>
        /// <param name="width">渲染到纹理的宽度</param>
        /// <param name="height">渲染到纹理的高度</param>
        /// <param name="format">渲染到纹理的格式</param>
        /// <param name="flag">渲染到纹理的渲染标志</param>
        /// <param name="color">渲染到纹理的颜色</param>
        /// <param name="useDepth">渲染到纹理是否使用深度</param>
        public void Setup(int width, int height, PixelFormat format, ClearFlag flag, ref Vector4 color, bool useDepth)
        {
            ICall_RenderToTexture_Setup(this, width, height, (int)format, (uint)flag, ref color, useDepth, 0, 0, 0, 0, 0, 0);
        }

        internal override IntPtr GetTextureHandlePtr()
        {
            return ICall_RenderToTexture_GetTextureHandlePtr(this);
        }

        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        extern private static void ICall_RenderToTexture_Bind(RenderToTexture self);

        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        extern private static void ICall_RenderToTexture_Release(RenderToTexture self);

        
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        extern private static void ICall_RenderToTexture_Setup(RenderToTexture self,int width,int height,int pixelFormat
            , uint flag, ref Vector4 color, bool useDepth
			,float screenRatio,int antiAliasQuality,int texLeft,int texRight,int texTop,int texBottom);
         
        [MethodImplAttribute(MethodImplOptions.InternalCall)]
        extern private static IntPtr ICall_RenderToTexture_GetTextureHandlePtr(RenderToTexture self);
    }
}