88 lines
2.4 KiB
C#
88 lines
2.4 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2010 The OpenRA Developers (see AUTHORS)
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation. For more information,
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* see LICENSE.
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*/
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#endregion
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using System;
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using System.IO;
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using OpenRA.FileFormats;
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using OpenRA.FileFormats.Graphics;
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using Tao.Cg;
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namespace OpenRA.GlRenderer
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{
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public class Shader : IShader
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{
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IntPtr effect;
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IntPtr technique;
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GraphicsDevice dev;
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public Shader(GraphicsDevice dev, string name)
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{
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this.dev = dev;
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string code;
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using (var file = new StreamReader(FileSystem.Open("cg{0}{1}.fx".F(Path.DirectorySeparatorChar, name))))
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code = file.ReadToEnd();
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effect = Cg.cgCreateEffect(dev.cgContext, code, null);
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if (effect == IntPtr.Zero)
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{
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var err = Cg.cgGetErrorString(Cg.cgGetError());
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var results = Cg.cgGetLastListing(dev.cgContext);
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throw new InvalidOperationException(
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string.Format("Cg compile failed ({0}):\n{1}", err, results));
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}
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technique = Cg.cgGetFirstTechnique(effect);
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if (technique == IntPtr.Zero)
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throw new InvalidOperationException("No techniques");
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while (Cg.cgValidateTechnique(technique) == 0)
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{
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technique = Cg.cgGetNextTechnique(technique);
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if (technique == IntPtr.Zero)
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throw new InvalidOperationException("No valid techniques");
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}
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}
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public void Render(Action a)
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{
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CgGl.cgGLEnableProfile(dev.vertexProfile);
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CgGl.cgGLEnableProfile(dev.fragmentProfile);
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var pass = Cg.cgGetFirstPass(technique);
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while (pass != IntPtr.Zero)
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{
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Cg.cgSetPassState(pass);
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a();
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Cg.cgResetPassState(pass);
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pass = Cg.cgGetNextPass(pass);
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}
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CgGl.cgGLDisableProfile(dev.fragmentProfile);
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CgGl.cgGLDisableProfile(dev.vertexProfile);
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}
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public void SetValue(string name, ITexture t)
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{
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var texture = (Texture)t;
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var param = Cg.cgGetNamedEffectParameter(effect, name);
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if (param != IntPtr.Zero && texture != null)
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CgGl.cgGLSetupSampler(param, texture.texture);
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}
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public void SetValue(string name, float x, float y)
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{
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var param = Cg.cgGetNamedEffectParameter(effect, name);
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if (param != IntPtr.Zero)
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CgGl.cgGLSetParameter2f(param, x, y);
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}
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public void Commit() { }
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}
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}
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