source: trunk/src/gfx/image.cc @ 319

// Copyright (C) 2011-2014 ChaosForge Ltd
// This file is part of NV Libraries.
// For conditions of distribution and use, see copyright notice in nv.hh

#include "nv/gfx/image.hh"

#include <algorithm>

using namespace nv;

image::image( glm::ivec2 size, size_t depth )
        : m_size( size ), m_depth( depth ), m_data( nullptr )
{
        m_data = new uint8[ static_cast<uint32>( m_size.x * m_size.y ) * m_depth ];
}

image::image( image_data* data )
        : m_size( data->get_size() ), m_depth( data->get_depth() ), m_data( data->release_data() )
{
        NV_ASSERT( m_data, "image created from empty image_data!" );
}


image::image( glm::ivec2 size, size_t depth, const uint8 * data, bool reversed )
        : m_size( size ), m_depth( depth ), m_data( nullptr )
{
        sint32 bsize = m_size.x * m_size.y * static_cast<sint32>( m_depth );
        m_data = new uint8[ bsize ];

        if ( reversed )
        {
                sint32 bline = m_size.x * static_cast<sint32>( m_depth );
                for( int i = 0; i < m_size.y; ++i )
                {
                        std::copy( data + i * bline, data + (i + 1) * bline, m_data + bsize - ( i + 1 ) * bline );
                }

        }
        else 
        {
                std::copy( data, data + bsize, m_data );
        }
}

void image::fill( uint8 value )
{
        std::fill( m_data, m_data + m_size.x * m_size.y * (int)m_depth, value );
}

void image::fill( region r, uint8 value, int stride )
{
        if ( stride == 0 ) stride = r.size.x * static_cast<sint32>( m_depth );

        sint32 bpos  = (r.pos.y*m_size.x + r.pos.x ) * static_cast<sint32>( m_depth );
        sint32 bline = m_size.x*static_cast<sint32>( m_depth );

        for( int i = 0; i < r.size.y; ++i )
        {
                // TODO: test 
                std::fill( m_data + bpos + bline * i, m_data + bpos + bline * i + stride, value );
        }
}


void image::set_region( region r, const uint8 * data, int stride )
{
        if ( stride == 0 ) stride = r.size.x * static_cast<sint32>( m_depth );
        
        sint32 bpos  = (r.pos.y*m_size.x + r.pos.x ) * static_cast<sint32>( m_depth );
        sint32 bline = m_size.x*static_cast<sint32>( m_depth );

        for( int i = 0; i < r.size.y; ++i )
        {
// TODO: test if same as old:
//              memcpy( m_data+((r.pos.y+i)*m_size.x + r.pos.x ) * m_depth, 
//                      data + (i*stride), r.size.x * m_depth );
                std::copy( data + i*stride, data + (i+1)*stride, m_data + bpos + bline * i );
        }
}

void image::set_region( region r, const image_data* idata )
{
        if ( idata->get_depth() == m_depth )
        {
                set_region( r, idata->get_data() );
                return;
        }

        fill( r, 255 );

        sint32 bpos       = (r.pos.y*m_size.x + r.pos.x ) * static_cast<sint32>( m_depth );
        sint32 bline      = m_size.x*static_cast<sint32>( m_depth );

        const uint8* data = idata->get_data();
        sint32 depth      = idata->get_depth();
        sint32 dstride    = r.size.x * static_cast<sint32>( depth );

        for( int y = 0; y < r.size.y; ++y )
        {
                sint32 pos = bpos + bline * y;
                for( int x = 0; x < r.size.x; ++x )
                {
                        sint32 xy = pos + x * m_depth;
                        for( int e = 0; e < depth; ++e )
                        {
                                m_data[ xy + e ] = data[ y*dstride + x * depth + e ];
                        }
                }
        }
}


image::~image()
{
        delete[] m_data;
}