Example #1
0
/*---------------------------------------------------------------------------
   Tests the selected input texture and changes configuration if the 
   resolutions do not match. The function does nothing for identical 
   configurations.
  ---------------------------------------------------------------------------*/
void Filter::Change(Buffers &Buffer)
   {
   vector2u Res[2];
   Texture::TexType Type[2];

   switch (Select)
      {
      case Filter::SelectVideo : 
         Res[0] = Buffer.GetVideoResolution();
         Res[1] = Video.Resolution();
         Type[0] = Buffer.GetVideoDataType();
         Type[1] = Video.DataType();
         break;

      case Filter::SelectDepth : 
         Res[0] = Buffer.GetDepthResolution();
         Res[1] = Depth.Resolution();
         Type[0] = Buffer.GetDepthDataType();
         Type[1] = Depth.DataType();
         break;

      default : throw dexception("Invalid Select enumeration.");
      }

   if (Res[0].U < 1 || Res[0].V < 1) {return;}
   
   if (Res[0].U != Res[1].U || Res[0].V != Res[1].V || Type[0] != Type[1])
      {
      Setup(Buffer);
      Assets(Buffer);
      }
   }
Example #2
0
/*---------------------------------------------------------------------------
   Class specific setup function for the effects assets.
  ---------------------------------------------------------------------------*/
void Filter::Assets(Buffers &Buffer)
   {
   if (!Ready()) {return;}

   Video.Create(Buffer.GetVideoResolution(), Buffer.GetVideoDataType());
   Video.ClearData();
   Video.Buffer(false);

   Model.Plane(1, Mesh::ModeSolid);
   Model.Buffer(false);

   File::Text Text;
   std::string CodeVert, CodeFrag;
   Text.Load(CodeVert, File::Path::Shader(File::FilterVert));
   Text.Load(CodeFrag, File::Path::Shader(File::FilterFrag));
   Program.Attach(CodeVert, Shader::ShaderVert);
   Program.Attach(CodeFrag, Shader::ShaderFrag);
   Program.Buffer(false);

   GLenum Error = glGetError();
   if (Error != GL_NO_ERROR) {throw dexception("OpenGL generated an error: %s", Debug::ErrorGL(Error));}
   }
Example #3
0
/*---------------------------------------------------------------------------
   Setup function that a intialises assets, matrices and other OpenGL
   related structure for rendering. NOTE: This must be called within a 
   valid OpenGL context.
  ---------------------------------------------------------------------------*/
void Filter::Setup(Buffers &Buffer)
   {
   Destroy();

   if (!GLEW_ARB_framebuffer_object)
      {throw dexception("Current OpenGL context does not support frame buffer objects.");}

   vector2u Res;
   
   switch (Select)
      {
      case Filter::SelectVideo : Res = Buffer.GetVideoResolution(); break;
      case Filter::SelectDepth : Res = Buffer.GetDepthResolution(); break;
      default : throw dexception("Invalid Select enumeration.");;
      }

   if (Res.X < 1 || Res.Y < 1) {return;}
   
   //Create a new frame buffer object
   glGenFramebuffers(1, &FBOID);
   glBindFramebuffer(GL_FRAMEBUFFER, FBOID);

   //Create a new depth buffer object, then associate a 
   // storage space for it, and attach it to the FBO
   glGenRenderbuffers(1, &DBOID);
   glBindRenderbuffer(GL_RENDERBUFFER, DBOID);
   glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT, Res.X, Res.Y);
   glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, DBOID);

   //Create a colour buffer in form of a texture and attach it to the FBO
   glGenTextures(1, &CBOID);
   glBindTexture(GL_TEXTURE_2D, CBOID);
   glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB8, Res.X, Res.Y, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
   glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, CBOID, 0);

   //FBO texture scaling
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
   glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
   glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);

   //Setup view port size
   ViewPort.Set4(0, 0, Res.X, Res.Y);

   //Compute frustum aspect ratio from viewport size
   Ratio.Set((float)ViewPort.C2, (float)ViewPort.C3);
   Ratio /= (float)Math::Min(ViewPort.C2, ViewPort.C3);

   //Default projection matrix
   MP = MP.Identity();
   MP = MP.Ortho(-Ratio.X, Ratio.X, -Ratio.Y, Ratio.Y, Near, Far);

   //Default model view matrix
   MV = MV.Identity();
   MV = MV.Scale(Ratio.X, Ratio.Y, 1.0f);

   //Default texture matrix
   MT = MT.Identity();
   //MT = MT.Scale(1.0f, -1.0f, 1.0f);
   //MT = MT.Translate(0.0f, -1.0f, 0.0f);

   MC = MC.Identity();

   //Error checking   
   GLenum Error = glCheckFramebufferStatus(GL_FRAMEBUFFER);
   if (Error != GL_FRAMEBUFFER_COMPLETE) {throw dexception("Failed to setup frame buffer object: %s.", Debug::StatusFBO(Error));}

   Error = glGetError();
   if (Error != GL_NO_ERROR) {throw dexception("OpenGL generated an error: %s", Debug::ErrorGL(Error));}
   }
Example #4
0
/*---------------------------------------------------------------------------
   Class specific setup function for the effects assets.
  ---------------------------------------------------------------------------*/
void FilterSolids::Assets(Buffers &Buffer)
   {
   if (!Ready()) {return;}

   vector2u Res = Buffer.GetDepthResolution();
   Depth.Create(Res, Buffer.GetDepthDataType());
   Depth.ClearData();
   Depth.Buffer(false);

   glMatrixMode(GL_MODELVIEW);
   glLoadIdentity();
   glPushMatrix();
   Light.SetPosition(vector4f(0.5f, -0.5f, Near + 1.0f, 0.0f));
   Light.Buffer(0);
   glPopMatrix();

   Grid = Res / GridDiv;
   Grid = Grid.Clamp(GridMin, GridMax);
   GridNorm = cast_vector2(float, Grid);
   GridNorm = GridNorm.Rcp();
   uint GridSmallest = Math::Min(Grid.U, Grid.V);

   Offset = cast_vector2(float, Grid);
   Offset = (Offset - 1.0f) * 0.5f;

   //Geometry subdivisions for curved solids
   uint PolyDiv = (Math::Min(Res.U, Res.V) / GridSmallest) / PolyDivPixels;
   PolyDiv = Math::Clamp(PolyDiv, PolyDivMin, PolyDivMax);

   File::Text Text;
   std::string CodeVert, CodeFrag;

   switch (Type)
      {
      case FilterSolids::Cubes :
         Model.Cube(1, Mesh::ModeSolid);
         Text.Load(CodeVert, File::Path::Shader(File::FilterSolidsDepthVert));
         EnableVideo = false;
         EnableDepth = true;
         EnableCal = false;
         Mat.SetShininess(0.0f);
         break;

      case FilterSolids::Spheres :
         Model.Sphere(PolyDiv, Mesh::ModeSolid);
         Text.Load(CodeVert, File::Path::Shader(File::FilterSolidsDepthVert));
         EnableVideo = false;
         EnableDepth = true;
         EnableCal = false;
         break;

      case FilterSolids::CubesTinted :
         Model.Cube(1, Mesh::ModeSolid);
         Text.Load(CodeVert, File::Path::Shader(File::FilterSolidsVideoVert));
         Video.Create(Buffer.GetVideoResolution(), Buffer.GetVideoDataType());
         Video.ClearData();
         Video.Buffer(false);
         EnableVideo = true;
         EnableDepth = true;
         EnableCal = true;
         Mat.SetShininess(0.0f);
         break;

      case FilterSolids::SpheresTinted :
         Model.Sphere(PolyDiv, Mesh::ModeSolid);
         Text.Load(CodeVert, File::Path::Shader(File::FilterSolidsVideoVert));
         Video.Create(Buffer.GetVideoResolution(), Buffer.GetVideoDataType());
         Video.ClearData();
         Video.Buffer(false);
         EnableVideo = true;
         EnableDepth = true;
         EnableCal = true;
         break;

      case FilterSolids::CubesFar :
         Model.Cube(1, Mesh::ModeSolid);
         Text.Load(CodeVert, File::Path::Shader(File::FilterSolidsDepthVert));
         EnableVideo = false;
         EnableDepth = true;
         EnableCal = false;
         Mat.SetShininess(0.0f);
         Far = -1000.0f;
         break;

      case FilterSolids::SpheresFar :
         Model.Sphere(PolyDiv, Mesh::ModeSolid);
         Text.Load(CodeVert, File::Path::Shader(File::FilterSolidsDepthVert));
         EnableVideo = false;
         EnableDepth = true;
         EnableCal = false;
         Far = -1000.0f;
         break;

      default : dexception("Unknown filter enumeration type.");
      }

   Range = Math::Abs(Far - Near);

   Model.Buffer(false);

   Text.Load(CodeFrag, File::Path::Shader(File::FilterSolidsFrag));
   Program.Attach(CodeVert, Shader::ShaderVert);
   Program.Attach(CodeFrag, Shader::ShaderFrag);
   Program.Buffer(false);

   Program.Bind();
   glUniform1f(glGetUniformLocation(Program.ID(), "Range"), Math::Abs(Range));
   glUniform1i(glGetUniformLocation(Program.ID(), "Depth"), 0);   //Texture unit 0
   glUniform1i(glGetUniformLocation(Program.ID(), "Video"), 1);   //Texture unit 1
   UID = glGetUniformLocation(Program.ID(), "TexCoord");
   glUniform2f(UID, 0.0f, 0.0f);
   Program.Unbind();

   //Projection matrix
   MP = MP.Identity();
   MP = MP.Frustum(-Ratio.X, Ratio.X, -Ratio.Y, Ratio.Y, Math::Abs(Near), Math::Abs(Far));

   //Modelview matrix
   float Scale = 1.0f / (float)GridSmallest;
   MV = MV.Identity();
   MV = MV.Scale(Scale, Scale, Scale);
   MV = MV.Translate(0.0f, 0.0f, (Near - Scale - 0.01f) / Scale);

   GLenum Error = glGetError();
   if (Error != GL_NO_ERROR) {throw dexception("OpenGL generated an error: %s", Debug::ErrorGL(Error));}
   }