public string GetShader(bool burnVariables)
{
string program = _Program;
if (burnVariables)
{
ShaderVariables shaderVars = GetShaderVars();
shaderVars.BurnVariables(ref program);
}
return(program);
}
public void Compile(OpenGL gl, string fragmentShader, int raysPerPixel)
{
_RaysPerPixel = raysPerPixel;
_FramesRendered = 0;
_Rays = 0;
_StopWatch = new Stopwatch();
_Program = fragmentShader;
const uint positionAttribute = 0;
var attributeLocations = new Dictionary <uint, string>
{
{ positionAttribute, "Position" }
};
try
{
if (_BurnVariables)
{
ShaderVariables shaderVars = GetShaderVars();
shaderVars.BurnVariables(ref fragmentShader);
}
DateTime start = DateTime.Now;
shaderRayMarch = new ShaderProgram();
shaderRayMarch.Create(gl,
ManifestResourceLoader.LoadTextFile(@"Shaders\RayMarchProgressive.vert"),
fragmentShader, attributeLocations);
DateTime end = DateTime.Now;
TimeSpan duration = end - start;
Console.WriteLine(duration.ToString());
}
catch (ShaderCompilationException exception)
{
_ShaderError = true;
MessageBox.Show(exception.Message + "\r\n" + exception.CompilerOutput);
}
}
/// <summary>
/// Initialises the Scene.
/// </summary>
/// <param name="gl">The OpenGL instance.</param>
public void Initialise(OpenGL gl, int width, int height, mat4 viewMatrix, vec3 position, bool burnVariables)
{
Logger.Log("ShaderRenderer.Initialise Started");
_GL = gl;
if (_Initialised)
{
Destroy(gl);
_Initialised = true;
}
_ViewMatrix = viewMatrix;
_Position = position;
_TargetWidth = width;
_TargetHeight = height;
_ProgressiveSteps = 1;
_ProgressiveIndex = 0;
_BurnVariables = burnVariables;
// We're going to specify the attribute locations for the position and normal,
// so that we can force both shaders to explicitly have the same locations.
const uint positionAttribute = 0;
var attributeLocations = new Dictionary <uint, string>
{
{ positionAttribute, "Position" }
};
Logger.Log("ShaderRenderer.Initialise Loading shaders from manifest");
// Create the raymarch shader
shaderRayMarch = new ShaderProgram();
if (_Program == null)
{
shaderRayMarch.Create(gl,
ManifestResourceLoader.LoadTextFile(@"Shaders\RayMarchProgressive.vert"),
ManifestResourceLoader.LoadTextFile(@"Shaders\RayMarch.frag"), attributeLocations);
}
else
{
if (_BurnVariables)
{
ShaderVariables shaderVars = GetShaderVars();
shaderVars.BurnVariables(ref _Program);
}
_ShaderError = false;
try
{
shaderRayMarch.Create(gl,
ManifestResourceLoader.LoadTextFile(@"Shaders\RayMarchProgressive.vert"),
_Program, attributeLocations);
}
catch (ShaderCompilationException exception)
{
_ShaderError = true;
MessageBox.Show(exception.Message + "\r\n" + exception.CompilerOutput);
}
}
// Create the transfer shader
string fragShader = @"
#version 130
in vec2 texCoord;
out vec4 FragColor;
uniform float mode; // 0=ramp, 1=exposure, 2=standard
uniform float toneFactor;
uniform float gammaFactor;
uniform float gammaContrast;
uniform sampler2D renderedTexture;
vec3 filmic(vec3 value)
{
float A=0.22;
float B=0.30;
float C=0.1;
float D=0.2;
float E=0.01;
float F=0.3;
return ((value*(A*value+C*B)+D*E)/(value*(A*value+B)+D*F)) - E/F;
}
void main()
{
vec4 rgb = texture(renderedTexture, vec2((texCoord.x+1)*0.5, (texCoord.y+1)*0.5));
FragColor=rgb;
// FragColor.rgb /= FragColor.a;
// brightness/contrast
float luminance = dot(FragColor.rgb, vec3(0.2126,0.7152,0.0722));
float luminanceOut = gammaFactor * pow(luminance, gammaContrast);
float multiplier = (max(0, luminance) * luminanceOut) / (luminance * luminance);
FragColor.rgb *= multiplier;
if (mode>2.9 && mode<3.1)
{
//filmic https://www.slideshare.net/ozlael/hable-john-uncharted2-hdr-lighting
FragColor.rgb = filmic(FragColor.rgb)/filmic(vec3(toneFactor));
}
else if (mode>1.9 && mode<2.1)
{
//reinhard https://imdoingitwrong.wordpress.com/2010/08/19/why-reinhard-desaturates-my-blacks-3/
float nL = luminance * (1+luminance/(toneFactor*toneFactor)) / (1+luminance);
FragColor.rgb *= nL;
}
else if (mode>0.9 && mode<1.1)
{
//exposure originally Matt Fairclough
FragColor.rgb = 1 - exp(-FragColor.rgb * toneFactor);
}
else
{
FragColor.rgb /= toneFactor;
}
}
";
shaderTransfer = new ShaderProgram();
shaderTransfer.Create(gl,
ManifestResourceLoader.LoadTextFile(@"Shaders\RayMarch.vert"),
fragShader, attributeLocations);
CheckForError(gl);
fragShader = @"
#version 130
in vec2 texCoord;
out vec4 FragColor;
void main()
{
FragColor=vec4(0,0,0,0);
}
";
shaderClean = new ShaderProgram();
shaderClean.Create(gl,
ManifestResourceLoader.LoadTextFile(@"Shaders\RayMarch.vert"),
fragShader, attributeLocations);
CheckForError(gl);
// Create the transfer shader
string fragShaderIntTransfer = @"
#version 130
in vec2 texCoord;
out vec4 FragColor;
uniform sampler2D renderedTexture;
void main()
{
vec4 rgb = texture(renderedTexture, vec2((texCoord.x+1)*0.5, (texCoord.y+1)*0.5));
FragColor=rgb;
}
";
shaderIntTransfer = new ShaderProgram();
shaderIntTransfer.Create(gl,
ManifestResourceLoader.LoadTextFile(@"Shaders\RayMarch.vert"),
fragShaderIntTransfer, attributeLocations);
CheckForError(gl);
Logger.Log("ShaderRenderer.Initialise Loading random numbers");
LoadRandomNumbers(gl);
Logger.Log("ShaderRenderer.Initialise Finished loading random numbers");
float[] viewport = new float[4];
gl.GetFloat(OpenGL.GL_VIEWPORT, viewport);
gl.GenFramebuffersEXT(2, _FrameBuffer);
CheckForError(gl);
gl.GenTextures(2, _RaytracerBuffer);
CheckForError(gl);
for (int i = 0; i < 2; i++)
{
gl.BindFramebufferEXT(OpenGL.GL_FRAMEBUFFER_EXT, _FrameBuffer[i]);
gl.BindTexture(OpenGL.GL_TEXTURE_2D, _RaytracerBuffer[i]);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_MAG_FILTER, OpenGL.GL_LINEAR);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_MIN_FILTER, OpenGL.GL_LINEAR);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_WRAP_S, OpenGL.GL_CLAMP_TO_EDGE);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_WRAP_T, OpenGL.GL_CLAMP_TO_EDGE);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_GENERATE_MIPMAP_SGIS, OpenGL.GL_FALSE); // automatic mipmap
// gl.TexImage2D(OpenGL.GL_TEXTURE_2D, 0, OpenGL.GL_RGBA, (int)viewport[2], (int)viewport[3], 0,
// OpenGL.GL_RGBA, OpenGL.GL_FLOAT, null);
gl.TexImage2D(OpenGL.GL_TEXTURE_2D, 0, OpenGL.GL_RGBA32F, _TargetWidth, _TargetHeight, 0,
OpenGL.GL_RGBA, OpenGL.GL_FLOAT, null);
CheckForError(gl);
gl.FramebufferTexture2DEXT(OpenGL.GL_FRAMEBUFFER_EXT, OpenGL.GL_COLOR_ATTACHMENT0_EXT, OpenGL.GL_TEXTURE_2D, _RaytracerBuffer[i], 0);
gl.FramebufferRenderbufferEXT(OpenGL.GL_FRAMEBUFFER_EXT, OpenGL.GL_DEPTH_ATTACHMENT_EXT, OpenGL.GL_RENDERBUFFER_EXT, 0);
}
gl.BindTexture(OpenGL.GL_TEXTURE_2D, 0);
gl.GenFramebuffersEXT(2, _EffectFrameBuffer);
CheckForError(gl);
gl.GenTextures(2, _EffectRaytracerBuffer);
CheckForError(gl);
for (int i = 0; i < 2; i++)
{
gl.BindFramebufferEXT(OpenGL.GL_FRAMEBUFFER_EXT, _EffectFrameBuffer[i]);
gl.BindTexture(OpenGL.GL_TEXTURE_2D, _EffectRaytracerBuffer[i]);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_MAG_FILTER, OpenGL.GL_LINEAR);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_MIN_FILTER, OpenGL.GL_LINEAR);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_WRAP_S, OpenGL.GL_CLAMP_TO_EDGE);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_WRAP_T, OpenGL.GL_CLAMP_TO_EDGE);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_GENERATE_MIPMAP_SGIS, OpenGL.GL_FALSE); // automatic mipmap
gl.TexImage2D(OpenGL.GL_TEXTURE_2D, 0, OpenGL.GL_RGBA32F, _TargetWidth, _TargetHeight, 0,
OpenGL.GL_RGBA, OpenGL.GL_FLOAT, null);
CheckForError(gl);
gl.FramebufferTexture2DEXT(OpenGL.GL_FRAMEBUFFER_EXT, OpenGL.GL_COLOR_ATTACHMENT0_EXT, OpenGL.GL_TEXTURE_2D, _EffectRaytracerBuffer[i], 0);
gl.FramebufferRenderbufferEXT(OpenGL.GL_FRAMEBUFFER_EXT, OpenGL.GL_DEPTH_ATTACHMENT_EXT, OpenGL.GL_RENDERBUFFER_EXT, 0);
}
gl.BindTexture(OpenGL.GL_TEXTURE_2D, 0);
// and now initialise the integer framebuffer
gl.GenFramebuffersEXT(1, _IntFrameBuffer);
CheckForError(gl);
gl.GenTextures(1, _PostprocessBuffer);
CheckForError(gl);
gl.BindFramebufferEXT(OpenGL.GL_FRAMEBUFFER_EXT, _IntFrameBuffer[0]);
gl.BindTexture(OpenGL.GL_TEXTURE_2D, _PostprocessBuffer[0]);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_MAG_FILTER, OpenGL.GL_LINEAR);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_MIN_FILTER, OpenGL.GL_LINEAR);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_WRAP_S, OpenGL.GL_CLAMP_TO_EDGE);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_WRAP_T, OpenGL.GL_CLAMP_TO_EDGE);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_GENERATE_MIPMAP_SGIS, OpenGL.GL_FALSE); // automatic mipmap
gl.TexImage2D(OpenGL.GL_TEXTURE_2D, 0, OpenGL.GL_RGBA, _TargetWidth, _TargetHeight, 0, OpenGL.GL_RGBA, OpenGL.GL_UNSIGNED_BYTE, null);
CheckForError(gl);
gl.FramebufferTexture2DEXT(OpenGL.GL_FRAMEBUFFER_EXT, OpenGL.GL_COLOR_ATTACHMENT0_EXT, OpenGL.GL_TEXTURE_2D, _PostprocessBuffer[0], 0);
gl.FramebufferRenderbufferEXT(OpenGL.GL_FRAMEBUFFER_EXT, OpenGL.GL_DEPTH_ATTACHMENT_EXT, OpenGL.GL_RENDERBUFFER_EXT, 0);
gl.BindTexture(OpenGL.GL_TEXTURE_2D, 0);
_PostProcess = new PostProcess();
_PostProcess.Initialise(gl);
gl.GenFramebuffersEXT(1, _DepthFrameBuffer);
gl.GenTextures(1, _DepthCalcBuffer);
gl.BindFramebufferEXT(OpenGL.GL_FRAMEBUFFER_EXT, _DepthFrameBuffer[0]);
gl.BindTexture(OpenGL.GL_TEXTURE_2D, _DepthCalcBuffer[0]);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_MAG_FILTER, OpenGL.GL_LINEAR);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_MIN_FILTER, OpenGL.GL_LINEAR_MIPMAP_LINEAR);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_WRAP_S, OpenGL.GL_CLAMP_TO_EDGE);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_TEXTURE_WRAP_T, OpenGL.GL_CLAMP_TO_EDGE);
gl.TexParameter(OpenGL.GL_TEXTURE_2D, OpenGL.GL_GENERATE_MIPMAP_SGIS, OpenGL.GL_TRUE);
gl.TexImage2D(OpenGL.GL_TEXTURE_2D, 0, OpenGL.GL_RGBA32F, 1, 1, 0, OpenGL.GL_RGBA, OpenGL.GL_FLOAT, null);
gl.FramebufferTexture2DEXT(OpenGL.GL_FRAMEBUFFER_EXT, OpenGL.GL_COLOR_ATTACHMENT0_EXT, OpenGL.GL_TEXTURE_2D, _DepthCalcBuffer[0], 0);
gl.FramebufferRenderbufferEXT(OpenGL.GL_FRAMEBUFFER_EXT, OpenGL.GL_DEPTH_ATTACHMENT_EXT, OpenGL.GL_RENDERBUFFER_EXT, 0);
_Initialised = true;
/*
* gl.GenRenderbuffersEXT(2, _RaytracerBuffer);
* gl.BindRenderbufferEXT(OpenGL.GL_RENDERBUFFER_EXT, _RaytracerBuffer[0]);
* gl.RenderbufferStorageEXT(OpenGL.GL_RENDERBUFFER_EXT, OpenGL.GL_RGBA32F, (int)viewport[2], (int)viewport[3]);
* gl.BindRenderbufferEXT(OpenGL.GL_RENDERBUFFER_EXT, _RaytracerBuffer[1]);
* gl.RenderbufferStorageEXT(OpenGL.GL_RENDERBUFFER_EXT, OpenGL.GL_RGBA32F, (int)viewport[2], (int)viewport[3]);
*/
// gl.GenRenderbuffersEXT(1, _RenderBuffer);
//gl.BindRenderbufferEXT(OpenGL.GL_RENDERBUFFER_EXT, _RenderBuffer[0]);
//gl.RenderbufferStorageEXT(OpenGL.GL_RENDERBUFFER_EXT, OpenGL.GL_RGBA, (int)viewport[2], (int)viewport[3]);
Logger.Log("ShaderRenderer.Initialise Finished");
}