You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
137 lines
3.5 KiB
C++
137 lines
3.5 KiB
C++
/*=========================================================================
|
|
|
|
Program: Visualization Toolkit
|
|
|
|
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.
|
|
|
|
=========================================================================*/
|
|
/**
|
|
* @class vtkShader
|
|
* @brief encapsulate a glsl shader
|
|
*
|
|
* vtkShader represents a shader, vertex, fragment, geometry etc
|
|
*/
|
|
|
|
#ifndef vtkShader_h
|
|
#define vtkShader_h
|
|
|
|
#include "vtkObject.h"
|
|
#include "vtkRenderingOpenGL2Module.h" // for export macro
|
|
|
|
#include <string> // For member variables.
|
|
#include <vector> // For member variables.
|
|
|
|
/**
|
|
* @brief Vertex or Fragment shader, combined into a ShaderProgram.
|
|
*
|
|
* This class creates a Vertex, Fragment or Geometry shader, that can be
|
|
* attached to a ShaderProgram in order to render geometry etc.
|
|
*/
|
|
|
|
class VTKRENDERINGOPENGL2_EXPORT vtkShader : public vtkObject
|
|
{
|
|
public:
|
|
static vtkShader* New();
|
|
vtkTypeMacro(vtkShader, vtkObject);
|
|
void PrintSelf(ostream& os, vtkIndent indent) override;
|
|
|
|
/** Available shader types. */
|
|
enum Type
|
|
{
|
|
Vertex, /**< Vertex shader */
|
|
Fragment, /**< Fragment shader */
|
|
Geometry, /**< Geometry shader */
|
|
Unknown /**< Unknown (default) */
|
|
};
|
|
|
|
/** Set the shader type. */
|
|
void SetType(Type type);
|
|
|
|
/** Get the shader type, typically Vertex or Fragment. */
|
|
Type GetType() const { return this->ShaderType; }
|
|
|
|
/** Set the shader source to the supplied string. */
|
|
void SetSource(const std::string& source);
|
|
|
|
/** Get the source for the shader. */
|
|
std::string GetSource() const { return this->Source; }
|
|
|
|
/** Get the error message (empty if none) for the shader. */
|
|
std::string GetError() const { return this->Error; }
|
|
|
|
/** Get the handle of the shader. */
|
|
int GetHandle() const { return this->Handle; }
|
|
|
|
/** Compile the shader.
|
|
* @note A valid context must to current in order to compile the shader.
|
|
*/
|
|
bool Compile();
|
|
|
|
/** Delete the shader.
|
|
* @note This should only be done once the ShaderProgram is done with the
|
|
* Shader.
|
|
*/
|
|
void Cleanup();
|
|
|
|
class ReplacementSpec
|
|
{
|
|
public:
|
|
std::string OriginalValue;
|
|
vtkShader::Type ShaderType;
|
|
bool ReplaceFirst;
|
|
bool operator<(const ReplacementSpec& v1) const
|
|
{
|
|
if (this->OriginalValue != v1.OriginalValue)
|
|
{
|
|
return this->OriginalValue < v1.OriginalValue;
|
|
}
|
|
if (this->ShaderType != v1.ShaderType)
|
|
{
|
|
return this->ShaderType < v1.ShaderType;
|
|
}
|
|
return (this->ReplaceFirst < v1.ReplaceFirst);
|
|
}
|
|
bool operator>(const ReplacementSpec& v1) const
|
|
{
|
|
if (this->OriginalValue != v1.OriginalValue)
|
|
{
|
|
return this->OriginalValue > v1.OriginalValue;
|
|
}
|
|
if (this->ShaderType != v1.ShaderType)
|
|
{
|
|
return this->ShaderType > v1.ShaderType;
|
|
}
|
|
return (this->ReplaceFirst > v1.ReplaceFirst);
|
|
}
|
|
};
|
|
class ReplacementValue
|
|
{
|
|
public:
|
|
std::string Replacement;
|
|
bool ReplaceAll;
|
|
};
|
|
|
|
protected:
|
|
vtkShader();
|
|
~vtkShader() override;
|
|
|
|
Type ShaderType;
|
|
int Handle;
|
|
bool Dirty;
|
|
|
|
std::string Source;
|
|
std::string Error;
|
|
|
|
private:
|
|
vtkShader(const vtkShader&) = delete;
|
|
void operator=(const vtkShader&) = delete;
|
|
};
|
|
|
|
#endif
|