source: trunk/packages/vizservers/nanovis/vr3d/vrTexture1D.cpp @ 2798

/* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
#include <vr3d/vrTexture1D.h>

#include <string.h>
#include <math.h>
#include <valarray> 

#ifdef _WIN32
inline unsigned int log2(unsigned int x) 
{
    unsigned int i = 0;
    while ( ( x = ( x >> 1 ) ) != 0 ) i++;
        return i;     
}
#endif


vrTexture1D::vrTexture1D(bool depth)
: _width(0)
{
        _target = TT_TEXTURE_1D;
        _wrapS =TW_CLAMP_TO_EDGE;
}

vrTexture1D::~vrTexture1D()
{
}

void vrTexture1D::setPixels(COLORFORMAT colorFormat, DATATYPE type, int width, void* data)

{
    setPixels(TT_TEXTURE_1D, colorFormat,  colorFormat, type, width, data);
}

void vrTexture1D::setPixels(TEXTARGET target,  COLORFORMAT internalColorFormat, COLORFORMAT colorFormat, DATATYPE type, int width, void* data)
{
        _target = target;
        _width = width;
        _type = type;
        _internalColorFormat = internalColorFormat;
        _colorFormat = colorFormat;
        _compCount = GetNumComponent(_colorFormat);

        if (_objectID)
        {
                glDeleteTextures(1, &_objectID);
        }

        glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
        glGenTextures(1, &_objectID);
        glBindTexture(_target, _objectID);

        glTexParameteri(_target, GL_TEXTURE_MAG_FILTER, _magFilter);
        glTexParameteri(_target, GL_TEXTURE_MIN_FILTER, _minFilter);
        glTexParameteri(_target, GL_TEXTURE_WRAP_S, _wrapS);

        glTexImage1D(_target, 0, _internalColorFormat, _width, 0, _colorFormat, _type, data);

        
}

void vrTexture1D::updatePixels(void* data)
{
        glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
        glBindTexture(_target, _objectID);
        glTexParameteri(_target, GL_TEXTURE_WRAP_S, _wrapS);
        glTexParameteri(_target, GL_TEXTURE_MAG_FILTER, _magFilter);
        glTexParameteri(_target, GL_TEXTURE_MIN_FILTER, _minFilter);
        glTexImage1D(_target, 0, _internalColorFormat, _width, 0, _colorFormat, _type, data);
}