Texture Class Reference

Wrapper for a GL texture. More...

#include <Texture.h>

List of all members.

Public Member Functions
	Texture ()
	default ctor
	Texture (const std::string &_name)
	ctor w/name
	~Texture ()
	dtor
void	generateEmpty (int _width, int _height)
	generate empty RGBA
void	generateEmptyf (int _width, int _height)
	generate empty RGAB (32bit float)
void	generateDepth (int _width, int _height)
	generate empty depth
void	generateFromFile (char *_filePath)
	generate texture from filepath
void	bind ()
	bind this texture
std::string	getName ()
	get the texture by name
Public Attributes
GLuint	id
	handle for this texture
Private Attributes
int	m_width
	texture dimensions
int	m_height
std::string	m_name
	the texture name

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Detailed Description

Wrapper for a GL texture.

Definition at line 14 of file Texture.h.

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Constructor & Destructor Documentation

Texture::Texture

(

)

[inline]

default ctor

Definition at line 21 of file Texture.h.

{}

Texture::Texture

(

const std::string &

_name

)

ctor w/name

Definition at line 4 of file Texture.cpp.

:id(0),m_width(0),m_height(0),m_name(_name){}

Texture::~Texture

(

)

dtor

Definition at line 5 of file Texture.cpp.

{}

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Member Function Documentation

void Texture::bind

(

)

[inline]

bind this texture

Definition at line 40 of file Texture.h.

{glBindTexture(GL_TEXTURE_2D, id);}

void Texture::generateDepth	(	int	_width,
		int	_height
	)

generate empty depth

Definition at line 47 of file Texture.cpp.

References m_height, and m_width.

{
    m_height = _height;
    m_width = _width;

    glGenTextures(1, &id);
    glBindTexture(GL_TEXTURE_2D, id);

    // Set the texture's stretching properties
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);

    glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE  );
    glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE  );
    glGenerateMipmap(GL_TEXTURE_2D);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_DEPTH_COMPONENT32,  m_width, m_height, 0, GL_DEPTH_COMPONENT, GL_FLOAT, NULL);
}

void Texture::generateEmpty	(	int	_width,
		int	_height
	)

generate empty RGBA

Definition at line 7 of file Texture.cpp.

References m_height, and m_width.

{
    m_height = _height;
    m_width = _width;

    glGenTextures(1, &id);
    glBindTexture(GL_TEXTURE_2D, id);

    // Set the texture's stretching properties
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);

    glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
    glTexParameterf( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
    glGenerateMipmap(GL_TEXTURE_2D);

    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,  m_width, m_height, 0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
}

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void Texture::generateEmptyf	(	int	_width,
		int	_height
	)

generate empty RGAB (32bit float)

Definition at line 26 of file Texture.cpp.

References m_height, and m_width.

{
    m_height = _height;
    m_width = _width;

    glGenTextures(1, &id);
    glBindTexture(GL_TEXTURE_2D, id);

    // Set the texture's stretching properties
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);

    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

    glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F_ARB, m_width, m_height, 0, GL_RGBA, GL_FLOAT, 0);

    glBindTexture(GL_TEXTURE_2D, 0);
}

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void Texture::generateFromFile

(

char *

_filePath

)

generate texture from filepath

Definition at line 65 of file Texture.cpp.

{
    QImage *image = new QImage();
    bool loaded=image->load(_filePath);
    if(loaded == true)
    {
        int width=image->width();
        int height=image->height();
        unsigned char *data = new unsigned char[width*height*3];
        unsigned int index=0;
        QRgb colour;
        for( int y=0; y<height; ++y)
        {
            for( int x=0; x<width; ++x)
            {
                colour=image->pixel(x,y);

                data[index++]=qRed(colour);
                data[index++]=qGreen(colour);
                data[index++]=qBlue(colour);
            }
        }

        glGenTextures(1,&id);
        glBindTexture(GL_TEXTURE_2D,id);

        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
        glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST_MIPMAP_NEAREST);

        glTexImage2D(GL_TEXTURE_2D,0,3,width,height,0,GL_RGB,GL_UNSIGNED_BYTE,data);
        glGenerateMipmap(GL_TEXTURE_2D);
    }
}

std::string Texture::getName

(

)

[inline]

get the texture by name

Definition at line 43 of file Texture.h.

References m_name.

{return m_name;}

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Member Data Documentation

GLuint Texture::id

handle for this texture

Definition at line 18 of file Texture.h.

int Texture::m_height [private]

Definition at line 47 of file Texture.h.

std::string Texture::m_name [private]

the texture name

Definition at line 49 of file Texture.h.

int Texture::m_width [private]

texture dimensions

Definition at line 47 of file Texture.h.

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The documentation for this class was generated from the following files:

• Texture.h
• Texture.cpp