source: trunk/src/gl/gl_texture2d.cc @ 295

// Copyright (C) 2012-2013 Kornel Kisielewicz
// This file is part of NV Libraries.
// For conditions of distribution and use, see copyright notice in nv.hh

#include "nv/gl/gl_texture2d.hh"

#include "nv/gl/gl_enum.hh"
#include "nv/lib/gl.hh"

using namespace nv;

nv::gl_texture2d::gl_texture2d( ivec2 size, pixel_format aformat, datatype adatatype, sampler asampler, void* data /*= nullptr */ )
        : texture2d( size, aformat, adatatype, asampler ), m_name()
{
        glBindTexture( GL_TEXTURE_2D, m_name.get_value() );

        // Detect if mipmapping was requested
        if (( asampler.filter_min != sampler::LINEAR && asampler.filter_min != sampler::NEAREST ) ||
                ( asampler.filter_max != sampler::LINEAR && asampler.filter_max != sampler::NEAREST ))
        {
                glTexParameteri(GL_TEXTURE_2D, GL_GENERATE_MIPMAP, GL_TRUE);
        }

        glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, (int)nv::sampler_filter_to_enum( m_sampler.filter_min ) );
        glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, (int)nv::sampler_filter_to_enum( m_sampler.filter_max ) );
        glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, (int)nv::sampler_wrap_to_enum( m_sampler.wrap_s) );
        glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, (int)nv::sampler_wrap_to_enum( m_sampler.wrap_t) );

        glBindTexture( GL_TEXTURE_2D, 0 );

        if (data)
        {
                assign(data);
        }
}

void nv::gl_texture2d::assign( void* data )
{
        glBindTexture( GL_TEXTURE_2D, m_name.get_value() );
        glTexImage2D( GL_TEXTURE_2D, 0, (GLint)nv::image_format_to_enum(m_format.format), m_size.x, m_size.y, 0, nv::image_format_to_enum(m_format.format), nv::datatype_to_gl_enum(m_format.type), data );
        glBindTexture( GL_TEXTURE_2D, 0 );
}

void nv::gl_texture2d::bind( size_t slot )
{
        glActiveTexture( GL_TEXTURE0 + static_cast< GLenum >( slot ) );
        glBindTexture( GL_TEXTURE_2D, m_name.get_value() );
}

void nv::gl_texture2d::unbind()
{
        glBindTexture( GL_TEXTURE_2D, 0 );
}

bool nv::gl_texture2d::is_valid() const
{
        return m_name.is_valid();
}