2019-09-08 21:15:42 +02:00
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using System;
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using System.Collections.Generic;
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using System.Drawing;
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using System.Text;
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using System.Threading.Tasks;
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using OpenTK.Graphics.OpenGL;
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using OpenTK;
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namespace LayoutBXLYT
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{
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public class BxlytShader : IDisposable
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{
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2019-09-28 23:27:48 +02:00
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public bool Compiled = false;
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2019-09-08 21:15:42 +02:00
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public int program;
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private int vertexShader;
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private int fragmentShader;
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private Dictionary<string, int> attributes = new Dictionary<string, int>();
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private Dictionary<string, int> uniforms = new Dictionary<string, int>();
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private int activeAttributeCount;
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public void LoadShaders()
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{
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2019-10-21 01:30:58 +02:00
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Compile();
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2019-09-08 21:15:42 +02:00
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}
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public void Enable()
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{
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GL.UseProgram(program);
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}
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public void Disable()
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{
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GL.UseProgram(0);
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}
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public void Dispose()
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{
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GL.DeleteProgram(program);
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}
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public virtual string VertexShader
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{
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get
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{
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StringBuilder vert = new StringBuilder();
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vert.AppendLine("uniform mat4 globalTransform;");
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vert.AppendLine("void main()");
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vert.AppendLine("{");
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{
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vert.AppendLine("gl_FrontColor = gl_Color;");
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vert.AppendLine("gl_Position = gl_ModelViewProjectionMatrix * globalTransform * gl_Vertex;");
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}
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vert.AppendLine("}");
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return vert.ToString();
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}
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}
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public virtual string FragmentShader
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{
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get
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{
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StringBuilder vert = new StringBuilder();
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vert.AppendLine("void main()");
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vert.AppendLine("{");
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{
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vert.AppendLine("gl_FragColor = gl_Color;");
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}
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vert.AppendLine("}");
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return vert.ToString();
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}
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}
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2019-10-20 22:41:58 +02:00
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//For non material panes
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public void SetBasic(BasePane pane)
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{
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var rotationMatrix = pane.GetRotationMatrix();
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SetMatrix("rotationMatrix", ref rotationMatrix);
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}
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2019-09-08 21:15:42 +02:00
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public void SetVec4(string name, Vector4 value)
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{
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if (uniforms.ContainsKey(name))
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GL.Uniform4(uniforms[name], value);
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}
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public void SetVec2(string name, Vector2 value)
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{
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if (uniforms.ContainsKey(name))
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GL.Uniform2(uniforms[name], value);
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}
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public void SetFloat(string name, float value)
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{
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if (uniforms.ContainsKey(name))
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GL.Uniform1(uniforms[name], value);
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}
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public void SetInt(string name, int value)
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{
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if (uniforms.ContainsKey(name))
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GL.Uniform1(uniforms[name], value);
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}
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2019-09-20 00:02:10 +02:00
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public void SetBool(string name, bool value)
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{
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int intValue = value == true ? 1 : 0;
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if (uniforms.ContainsKey(name))
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GL.Uniform1(uniforms[name], intValue);
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}
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2019-09-08 21:15:42 +02:00
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public void SetColor(string name, Color color)
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{
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if (uniforms.ContainsKey(name))
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GL.Uniform4(uniforms[name], color);
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}
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public void SetMatrix(string name, ref Matrix4 value)
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{
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if (uniforms.ContainsKey(name))
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GL.UniformMatrix4(uniforms[name], false, ref value);
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}
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public int this[string name]
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{
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2019-09-08 23:08:09 +02:00
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get { return uniforms[name]; }
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2019-09-08 21:15:42 +02:00
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}
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private void LoadAttributes(int program)
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{
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attributes.Clear();
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GL.GetProgram(program, GetProgramParameterName.ActiveAttributes, out activeAttributeCount);
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for (int i = 0; i < activeAttributeCount; i++)
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{
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2019-09-28 23:33:44 +02:00
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int size = 0;
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ActiveAttribType type;
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string name = GL.GetActiveAttrib(program, i, out size, out type);
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2019-09-08 21:15:42 +02:00
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int location = GL.GetAttribLocation(program, name);
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// Overwrite existing vertex attributes.
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attributes[name] = location;
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}
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}
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2019-09-28 23:27:48 +02:00
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public void EnableVertexAttributes()
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{
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foreach (KeyValuePair<string, int> attrib in attributes)
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GL.EnableVertexAttribArray(attrib.Value);
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}
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public void DisableVertexAttributes()
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{
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foreach (KeyValuePair<string, int> attrib in attributes)
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GL.DisableVertexAttribArray(attrib.Value);
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}
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public int GetAttribute(string name)
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{
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if (string.IsNullOrEmpty(name) || !attributes.ContainsKey(name))
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return -1;
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else
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return attributes[name];
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}
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2019-09-08 21:15:42 +02:00
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private void LoadUniorms(int program)
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{
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uniforms.Clear();
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GL.GetProgram(program, GetProgramParameterName.ActiveUniforms, out activeAttributeCount);
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for (int i = 0; i < activeAttributeCount; i++)
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{
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2019-09-08 23:08:09 +02:00
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int size = 0;
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2019-09-08 23:45:57 +02:00
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ActiveUniformType type;
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string name = GL.GetActiveUniform(program, i, out size, out type);
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2019-09-08 21:15:42 +02:00
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int location = GL.GetUniformLocation(program, name);
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// Overwrite existing vertex attributes.
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uniforms[name] = location;
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}
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}
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public void Compile()
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{
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program = CompileShaders();
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2019-09-28 23:27:48 +02:00
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LoadAttributes(program);
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2019-09-08 21:15:42 +02:00
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LoadUniorms(program);
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OnCompiled();
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2019-09-28 23:27:48 +02:00
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Compiled = true;
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2019-09-08 21:15:42 +02:00
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}
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public virtual void OnCompiled() { }
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private int CompileShaders()
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{
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vertexShader = GL.CreateShader(ShaderType.VertexShader);
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GL.ShaderSource(vertexShader, VertexShader);
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GL.CompileShader(vertexShader);
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fragmentShader = GL.CreateShader(ShaderType.FragmentShader);
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GL.ShaderSource(fragmentShader, FragmentShader);
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GL.CompileShader(fragmentShader);
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var program = GL.CreateProgram();
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GL.AttachShader(program, vertexShader);
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GL.AttachShader(program, fragmentShader);
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GL.LinkProgram(program);
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var info = GL.GetProgramInfoLog(program);
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if (!string.IsNullOrWhiteSpace(info))
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Console.WriteLine($"GL.LinkProgram had info log: {info}");
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GL.DetachShader(program, vertexShader);
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GL.DetachShader(program, fragmentShader);
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GL.DeleteShader(vertexShader);
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GL.DeleteShader(fragmentShader);
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return program;
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}
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}
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}
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