gl_texture.h
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#ifndef STIM_GL_TEXTURE_H
#define STIM_GL_TEXTURE_H
/*
includes not necessary (yet)
#include <iterator>
#include <algorithm>
*/
#include <math.h>
#include <iostream>
#include <vector>
#include "../grids/image_stack.h"
#include <GL/glut.h>
//#include <GL/glext.h>
#include "./error.h"
namespace stim{
/*
class gl_texture
Uses image_stack class in order to create a texture object.
*/
template<typename T>
class gl_texture : public virtual image_stack<T>
{
private:
/// Sets the internal texture_type, based on the data
/// size. Either 3D, 2D, 1D textures.
void
setTextureType()
{
if (R[3] > 1)
texture_type = GL_TEXTURE_3D;
else if (R[3] == 1 && R[2] == 0)
texture_type = GL_TEXTURE_1D;
else if (R[3] == 1)
texture_type = GL_TEXTURE_2D;
}
protected:
std::string path;
GLuint texID; //OpenGL object
GLenum texture_type; //1D, 2D, 3D
GLint interpType;
GLint texWrap;
GLenum type;
GLenum format;
using image_stack<T>::R;
using image_stack<T>::S;
using image_stack<T>::ptr;
using image_stack<T>::samples;
public:
///default constructor
gl_texture()
{
}
///@param string path to the directory with the image files.
///Creates an instance of the gl_texture object with a path to the data.
gl_texture(std::string file_mask)
{
//path = file_mask;
image_stack<T>::load_images(file_mask);
setTextureType();
}
///returns the dimentions of the data in the x, y, z directions.
vec<int>
getSize()
{
stim::vec<int> size(R[1], R[2], R[3]);
return size;
}
///@param GLint interp --GL_LINEAR, GL_NEAREST...
///@param GLint twrap --GL_REPEAR, GL_CLAMP_TO_EDGE...
///@param GLenum dataType --GL_UNSIGNED_BYTE, GL_FLOAT16...
///@param GLenum dataFormat--GL_LUMINANCE, GL_RGB...
/// Texture paramenters.
void
setTexParam(GLint interp = GL_LINEAR,
GLint twrap = GL_CLAMP_TO_EDGE,
GLenum dataType = GL_UNSIGNED_BYTE,
GLenum dataFormat = GL_LUMINANCE)
{
interpType = interp;
texWrap = twrap;
type = dataType;
format = dataFormat;
}
///@param x size of the voxel in x direction
///@param y size of the voxel in y direction
///@param z size of the voxel in z direction
/// Sets the dimenstions of the voxels.
void
setDims(float x, float y, float z)
{
S[1] = x;
S[2] = y;
S[3] = z;
}
///Returns a stim::vec that contains the x, y, z sizes of the voxel.
vec<float>
getDims()
{
vec<float> dims(S[1], S[2], S[3]);
return dims;
}
///@param file_Path location of the directory with the files
/// Sets the path and calls the loader on that path.
void
setPath(std::string file_path)
{
path = file_path;
image_stack<T>::load_images(path.append("/*.jpg"));
setTextureType();
}
/// Returns an std::string path associated with an instance of the gl_texture class.
std::string
getPath()
{
return path;
}
/// Returns the GLuint id of the texture created by/associated with the
/// instance of the gl_texture class.
GLuint
getTexture()
{
return texID;
}
/// Creates a texture and from the loaded data and
/// assigns that texture to texID
//TO DO :::: 1D textures
//TO DO:::add methods for handling the cases of T
// and convert them to GL equivalent.
// i.e. an overloaded function that handles paramenter conversion.
void
createTexture()
{
glPixelStorei(GL_UNPACK_ALIGNMENT,1);
glGenTextures(1, &texID);
glBindTexture(texture_type, texID);
glTexParameteri(texture_type,
GL_TEXTURE_MIN_FILTER,
interpType);
glTexParameteri(texture_type,
GL_TEXTURE_MAG_FILTER,
interpType);
switch(texture_type)
{
case GL_TEXTURE_3D:
glTexParameteri(texture_type,
GL_TEXTURE_WRAP_S,texWrap);
// GL_REPEAT);
// GL_CLAMP_TO_EDGE);
glTexParameteri(texture_type,
GL_TEXTURE_WRAP_T,texWrap);
// GL_REPEAT);
// GL_CLAMP_TO_EDGE);
glTexParameteri(texture_type,
GL_TEXTURE_WRAP_R,texWrap);
// GL_REPEAT);
// GL_CLAMP_TO_EDGE);
glTexImage3D(texture_type,
0,
// GL_RGB16,
1,
R[1],
R[2],
R[3],
0,
format,
type,
ptr);
//GL_UNSIGNED_BYTE can be TYPES, convert to GL equivalents
glPixelStorei(GL_PACK_ALIGNMENT,1);
break;
case GL_TEXTURE_2D:
glTexParameteri(texture_type,
GL_TEXTURE_WRAP_S, texWrap);
glTexParameteri(texture_type,
GL_TEXTURE_WRAP_T, texWrap);
glTexImage2D(texture_type,
0,
1,
R[1],
R[2],
0,
format,
type,
ptr);
break;
}
}
///Temporary methods for debugging and testing are below.
///Self-explanatory.
T*
getData()
{
return ptr;
}
};
}
#endif