#include "stdafx.h"

#include <osg/MatrixTransform>
#include <osg/PositionAttitudeTransform>
#include <osg/Texture>
#include <osg/Texture2D>
#include <osg/Geometry>
#include <osg/Geode>
#include <osgDB/Registry>
#include <osgDB/ReadFile>
#include <osgDB/WriteFile>
#include <osg/Image>
#include <osgViewer/Viewer>

osg::ref_ptr<osg::Geometry> createPlane( float length, float width )
{
	osg::ref_ptr<osg::Vec3Array> vec = new osg::Vec3Array;
	vec->resize( 4 );
	(*vec)[0] = osg::Vec3f(  -2, 0, -2 );
	(*vec)[1] = osg::Vec3f( -2, 0, 2 );
	(*vec)[2] = osg::Vec3f( 2, 0, 2 );
	(*vec)[3] = osg::Vec3f( 2, 0, -2 );

	osg::ref_ptr<osg::Vec3Array> nor = new osg::Vec3Array;
	nor->push_back( osg::Vec3f( 0.0, -1.0, 0.0 ) );

	osg::ref_ptr<osg::Vec2Array> tex = new osg::Vec2Array;
	tex->push_back( osg::Vec2f(0.0, 0.0) );
	tex->push_back( osg::Vec2f(0.0, 1.0) );
	tex->push_back( osg::Vec2f(1.0, 1.0) );
	tex->push_back( osg::Vec2f(1.0, 0.0) );

	osg::ref_ptr<osg::Geometry> geo = new osg::Geometry;
	geo->setVertexArray( vec.get() );
	geo->setTexCoordArray( 0, tex.get() );
	geo->setNormalArray( nor.get() );
	geo->setNormalBinding( osg::Geometry::BIND_PER_PRIMITIVE_SET );
	geo->addPrimitiveSet( new osg::DrawArrays( osg::PrimitiveSet::QUADS, 0, 4 ) );

	return geo;
}



int main(int, char **)
{
	osgViewer::Viewer viewer;
	osg::ref_ptr<osg::Geode> mygeode = new osg::Geode;
	osg::StateSet* mystate0 = mygeode->getOrCreateStateSet();

	osg::ref_ptr<osg::Image> img = osgDB::readImageFile("osg32.rgb");
	osg::ref_ptr<osg::Image> img1 = osgDB::readImageFile("osg16.rgb");

	osg::ref_ptr<osg::Image> image = new osg::Image;
	osg::Image::MipmapDataType mipmapData;
	mipmapData.push_back(img->getTotalSizeInBytes());
	//mipmapData.push_back(img->getTotalSizeInBytes()+img1->getTotalSizeInBytes());

	unsigned char* ptr = new unsigned char[img->getTotalSizeInBytes()+img1->getTotalSizeInBytes()];

	image->setImage(img->s(), img->t(), img->r(), 
		img->getInternalTextureFormat(), img->getPixelFormat(), img->getDataType(),
		ptr, osg::Image::USE_NEW_DELETE,img->getPacking());

	image->setMipmapLevels(mipmapData);

	memcpy(ptr, img->data(), img->getTotalSizeInBytes());
	memcpy(ptr+img->getTotalSizeInBytes(), img1->data(), img1->getTotalSizeInBytes());

	///////////////////////////////////////////////////////////////////////////////////////////////////////////////
	osg::ref_ptr<osg::Texture2D> mytex = new osg::Texture2D;
	mytex->setImage( 0, image.get() );
	mytex->setUseHardwareMipMapGeneration(false);
	mystate0->setTextureAttributeAndModes( 0, mytex.get(), osg::StateAttribute::ON );
	mygeode->addDrawable( createPlane(64, 64).get() );

	viewer.setSceneData( mygeode.get() );
	return viewer.run();
}