source: trunk/packages/vizservers/nanovis/vr3d/vrTexture2D.cpp @ 2103

#include <vr3d/vrTexture2D.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


vrTexture2D::vrTexture2D(bool depth)
: _width(0), _depthTexture(depth)
{
        _target = TT_TEXTURE_2D;
        _wrapT = TW_CLAMP_TO_EDGE;
        _wrapS =TW_CLAMP_TO_EDGE;
}

vrTexture2D::~vrTexture2D()
{
}

void vrTexture2D::setPixels(COLORFORMAT colorFormat, DATATYPE type, int width, int height, void* data)

{
    TEXTARGET target;
#ifndef OPENGLES
    if ((pow(2.0f, (float)log2(width)) != width) && 
                (pow(2.0f, (float)log2(height)) != height))
        {
                if (type == DT_FLOAT)
                {
                        target = TT_TEXTURE_RECTANGLE;
                }
                else
                {
                        target = TT_TEXTURE_2D;
                }
        }
        else
        {
                target = TT_TEXTURE_2D;
        }
#else
        target = TT_TEXTURE_2D;
#endif

    setPixels(target, colorFormat,  colorFormat, type, width, height, data);
}

void vrTexture2D::setPixels(TEXTARGET target,  COLORFORMAT internalColorFormat, COLORFORMAT colorFormat, DATATYPE type, int width, int height, void* data)
{
    _target = target;
        _width = width;
        _height = height;
        _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);
        glTexImage2D(_target, 0, _internalColorFormat, _width, _height, 0, _colorFormat, _type, data);
    glTexParameteri(_target, GL_TEXTURE_MAG_FILTER, _magFilter);
        glTexParameteri(_target, GL_TEXTURE_MIN_FILTER, _minFilter);
        
        // TBD...
#ifndef OPENGLES
        if (_depthTexture)
        {
                //glTexParameteri(_target, GL_DEPTH_TEXTURE_MODE, GL_INTENSITY);
                glTexParameteri(_target, GL_DEPTH_TEXTURE_MODE, GL_LUMINANCE);
                
                glTexParameteri(_target, GL_TEXTURE_COMPARE_FUNC, GL_LEQUAL);
                glTexParameteri(_target, GL_TEXTURE_COMPARE_MODE, GL_COMPARE_R_TO_TEXTURE); 

                //glDrawBuffer(GL_NONE);
                //glReadBuffer(GL_NONE);
        }
#endif

        
        //TBD..
        glTexParameterf(_target, GL_TEXTURE_WRAP_S, _wrapS);
        glTexParameterf(_target, GL_TEXTURE_WRAP_T, _wrapT);

        
}

void vrTexture2D::updatePixels(void* data)
{
        glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
        glBindTexture(_target, _objectID);
        glTexParameteri(_target, GL_TEXTURE_WRAP_S, _wrapS);
        glTexParameteri(_target, GL_TEXTURE_WRAP_S, _wrapT);
        glTexParameteri(_target, GL_TEXTURE_MAG_FILTER, _magFilter);
        glTexParameteri(_target, GL_TEXTURE_MIN_FILTER, _minFilter);
        glTexImage2D(_target, 0, _internalColorFormat, _width, _height, 0, _colorFormat, _type, data);
}