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/*=========================================================================
Program: Visualization Toolkit
Module: vtkColorMaterialHelper.cxx
Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
All rights reserved.
See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notice for more information.
=========================================================================*/
#include "vtkColorMaterialHelper.h"
#include "vtkShaderProgram2.h"
#include "vtkObjectFactory.h"
#include "vtkShader2.h"
#include "vtkShader2Collection.h"
#include "vtkUniformVariables.h"
#include "vtkgl.h"
extern const char * vtkColorMaterialHelper_vs;
//----------------------------------------------------------------------------
vtkStandardNewMacro(vtkColorMaterialHelper);
//----------------------------------------------------------------------------
vtkCxxSetObjectMacro(vtkColorMaterialHelper, Shader, vtkShaderProgram2);
//----------------------------------------------------------------------------
vtkColorMaterialHelper::vtkColorMaterialHelper()
{
this->Shader = 0;
}
//----------------------------------------------------------------------------
vtkColorMaterialHelper::~vtkColorMaterialHelper()
{
this->SetShader(0);
}
//----------------------------------------------------------------------------
void vtkColorMaterialHelper::Initialize(vtkShaderProgram2* pgm)
{
if (this->Shader != pgm)
{
this->SetShader(pgm);
if (pgm)
{
vtkShader2 *s=vtkShader2::New();
s->SetSourceCode(vtkColorMaterialHelper_vs);
s->SetType(VTK_SHADER_TYPE_VERTEX);
s->SetContext(pgm->GetContext());
pgm->GetShaders()->AddItem(s);
s->Delete();
}
}
}
//----------------------------------------------------------------------------
void vtkColorMaterialHelper::PrepareForRendering()
{
#ifndef NDEBUG
if (!this->Shader)
{
vtkErrorMacro("Please Initialize() before calling PrepareForRendering().");
return ;
}
#endif
this->Mode = vtkColorMaterialHelper::DISABLED;
if (glIsEnabled(GL_COLOR_MATERIAL))
{
GLint colorMaterialParameter;
glGetIntegerv(GL_COLOR_MATERIAL_PARAMETER, &colorMaterialParameter);
switch (colorMaterialParameter)
{
case GL_AMBIENT:
this->Mode = vtkColorMaterialHelper::AMBIENT;
break;
case GL_DIFFUSE:
this->Mode = vtkColorMaterialHelper::DIFFUSE;
break;
case GL_SPECULAR:
this->Mode = vtkColorMaterialHelper::SPECULAR;
break;
case GL_AMBIENT_AND_DIFFUSE:
this->Mode = vtkColorMaterialHelper::AMBIENT_AND_DIFFUSE;
break;
case GL_EMISSION:
this->Mode = vtkColorMaterialHelper::EMISSION;
break;
}
}
}
//----------------------------------------------------------------------------
void vtkColorMaterialHelper::Render()
{
#ifndef NDEBUG
if (!this->Shader)
{
vtkErrorMacro("Please Initialize() before calling Render().");
return;
}
#endif
int value=this->Mode;
this->Shader->GetUniformVariables()->SetUniformi("vtkColorMaterialHelper_Mode",1,&value);
}
//----------------------------------------------------------------------------
void vtkColorMaterialHelper::SetUniformVariables()
{
this->PrepareForRendering(); // iniitialize this with gl state
this->Render(); // send as uniforms
}
//----------------------------------------------------------------------------
void vtkColorMaterialHelper::PrintSelf(ostream& os, vtkIndent indent)
{
this->Superclass::PrintSelf(os, indent);
os << indent << "Shader: " << this->Shader << endl;
}
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