source: trunk/src/lua/lua_map_tile.cc @ 452

// Copyright (C) 2012-2015 ChaosForge Ltd
// http://chaosforge.org/
//
// This file is part of Nova libraries. 
// For conditions of distribution and use, see copying.txt file in root folder.

#include "nv/lua/lua_map_tile.hh"

#include "nv/lua/lua_map_area.hh"
#include "nv/stl/flags.hh"
#include "nv/stl/numeric.hh"
#include "nv/stl/algorithm.hh"
#include "nv/core/random.hh"
#include "nv/lua/lua_area.hh"
#include "nv/lua/lua_math.hh"
#include "nv/lua/lua_values.hh"
#include "nv/lua/lua_raw.hh"

static const char* NLUA_MAP_TILE_METATABLE = "map_tile";

struct map_tile
{
        nv::uint8*  data;
        nv::uchar8* ascii;
        nv::uint16  size_x;
        nv::uint16  size_y;
};


// static bool nlua_is_map_tile( lua_State* L, int index )
// {
//      return luaL_testudata( L, index, NLUA_MAP_TILE_METATABLE ) != 0;
// }
// 
// static map_tile nlua_to_map_tile( lua_State* L, int index )
// {
//      return *(map_tile*)luaL_checkudata( L, index, NLUA_MAP_TILE_METATABLE );
// }

static map_tile* nlua_to_pmap_tile( lua_State* L, int index )
{
        return reinterpret_cast<map_tile*>( luaL_checkudata( L, index, NLUA_MAP_TILE_METATABLE ) );
}

static void nlua_push_map_tile( lua_State* L, const map_tile& tile )
{
        map_tile* result = reinterpret_cast<map_tile*>( lua_newuserdata( L, sizeof(map_tile) ) );
        *result = tile;
        luaL_setmetatable( L, NLUA_MAP_TILE_METATABLE );
}

static int nlua_map_tile_new( lua_State* L )
{
        bool ascii = lua_toboolean( L, 4 ) != 0;
        nv::map_area* map_area = nv::lua::detail::to_map_area( L, 3 );
        lua_settop( L, 2 );
        nv::string_buffer code( nv::trimmed( lua_tostring( L, 1 ) ) );
        nv::string_view chars( " \r\t" );
        code.erase( nv::remove_if( code.begin(), code.end(),
                [&chars] ( const char& c )
        {
                return chars.find( c ) != nv::string_view::npos;
        } ), code.end() );

        map_tile tile;

        tile.size_y = nv::uint16( nv::count( code.begin(), code.end(), '\n' ) + 1 );
        tile.size_x = nv::uint16( code.find( '\n' ) );
        if ( tile.size_x == 0 )
        {
                tile.size_x = nv::uint16( code.length() );
        }
        tile.data  = new nv::uint8[ tile.size_x * tile.size_y ];
        tile.ascii = ( ascii ? new nv::uchar8[ tile.size_x * tile.size_y ] : nullptr );

        nv::uint8 translation[256] = { 0 };
        
        // TODO: error reporting
        if ( lua_istable( L, 2 ) )
        {
                lua_pushnil( L );
                while ( lua_next( L, 2 ) != 0 )
                {
                        // uses 'key' (at index -2) and 'value' (at index -1) */
                        if ( lua_isstring( L, -2 ) && lua_objlen( L, -2 ) == 1 )
                        {
                                translation[ nv::uint8( lua_tostring( L, -2 )[0] ) ] = nv::uint8( map_area->string_to_id( lua_tostring( L, -1 ) ) );
                        }
                        // removes 'value'; keeps 'key' for next iteration */
                        lua_pop( L, 1 );
                }
        }

        for ( nv::uint16 line = 0; line < tile.size_x; line++ )
                for ( nv::uint16 row = 0; row < tile.size_y; row++ )
                {
                        nv::uchar8 gylph = nv::uchar8( code[ row * ( tile.size_x + 1 ) + line ] );
                        // TODO: check for errors
                        tile.data[ row * tile.size_x + line ] = translation[ gylph ];
                        if ( ascii ) tile.ascii[row * tile.size_x + line] = gylph;
                }

        nlua_push_map_tile( L, tile );
        return 1;
}

static int nlua_map_tile_clone( lua_State* L )
{
        map_tile* old_tile = nlua_to_pmap_tile( L, 1 );
        map_tile* new_tile = reinterpret_cast<map_tile*>( lua_newuserdata( L, sizeof( map_tile ) ) );
        new_tile->size_x = old_tile->size_x;
        new_tile->size_y = old_tile->size_y;
        nv::uint32 size  = new_tile->size_x * new_tile->size_y;
        new_tile->data   = new nv::uint8[ size ];
        new_tile->ascii  = nullptr;
        if ( old_tile->ascii )
        {
                new_tile->ascii = new nv::uchar8[ size ];
        }
        nv::raw_copy_n( old_tile->data, size, new_tile->data );
        if ( old_tile->ascii ) nv::raw_copy_n( old_tile->ascii, size, new_tile->ascii );

        luaL_getmetatable( L, NLUA_MAP_TILE_METATABLE );
        lua_setmetatable( L, -2 );
        return 1;
}

static int nlua_map_tile_place( lua_State* L )
{
        map_tile* tile     = nlua_to_pmap_tile( L, 1 );
        nv::map_area* area = nv::lua::detail::to_map_area( L, 2 );
        nv::ivec2 coord    = nv::lua::detail::to_coord( L, 3 );

        for ( nv::uint16 x = 0; x < tile->size_x; ++x )
                for ( nv::uint16 y = 0; y < tile->size_y; ++y )
                {
                        nv::uint8 c = tile->data[ y * tile->size_x + x ];
                        if ( c != 0 ) area->set_cell( coord + nv::ivec2( x, y ), c );
                }

        return 0;
}

static nv::uint8* nlua_map_tile_flip_x_helper( nv::uint8* src, nv::uint16 sx, nv::uint16 sy )
{
        if ( src == nullptr ) return nullptr;
        nv::uint8* data = new nv::uint8[ sx * sy ];
        for ( nv::uint16 x = 0; x < sx; ++x )
                for ( nv::uint16 y = 0; y < sy; ++y )
                {
                        data[ y * sx + x ] = src[ ( y + 1 ) * sx - x - 1 ];
                }
        delete src;
        return data;
}

static nv::uint8* nlua_map_tile_flip_y_helper( nv::uint8* src, nv::uint16 sx, nv::uint16 sy )
{
        if ( src == nullptr ) return nullptr;
        nv::uint8* data = new nv::uint8[ sx * sy ];
        for ( nv::uint16 x = 0; x < sx; ++x )
                for ( nv::uint16 y = 0; y < sy; ++y )
                {
                        data[ y * sx + x ] = src[ ( sy - y - 1 ) * sx + x ];
                }
        delete src;
        return data;
}

static nv::uint8* nlua_map_tile_flip_xy_helper( nv::uint8* src, nv::uint16 sx, nv::uint16 sy )
{
        if ( src == nullptr ) return nullptr;
        nv::uint8* data = new nv::uint8[ sx * sy ];
        for ( nv::uint16 x = 0; x < sx; ++x )
                for ( nv::uint16 y = 0; y < sy; ++y )
                {
                        data[ y * sx + x ] = src[ ( sy - y ) * sx - x - 1 ];
                }
        delete src;
        return data;
}

static int nlua_map_tile_flip_x( lua_State* L )
{
        map_tile* tile = nlua_to_pmap_tile( L, 1 );
        tile->data     = nlua_map_tile_flip_x_helper( tile->data,  tile->size_x, tile->size_y );
        tile->ascii    = nlua_map_tile_flip_x_helper( tile->ascii, tile->size_x, tile->size_y );
        return 0;
}

static int nlua_map_tile_flip_y( lua_State* L )
{
        map_tile* tile = nlua_to_pmap_tile( L, 1 );
        tile->data     = nlua_map_tile_flip_y_helper( tile->data,  tile->size_x, tile->size_y );
        tile->ascii    = nlua_map_tile_flip_y_helper( tile->ascii, tile->size_x, tile->size_y );
        return 0;
}

static int nlua_map_tile_flip_xy( lua_State* L )
{
        map_tile* tile = nlua_to_pmap_tile( L, 1 );
        tile->data     = nlua_map_tile_flip_xy_helper( tile->data,  tile->size_x, tile->size_y );
        tile->ascii    = nlua_map_tile_flip_xy_helper( tile->ascii, tile->size_x, tile->size_y );
        return 0;
}

static int nlua_map_tile_flip_random( lua_State* L )
{
        switch ( nv::random::get().urand( 4 ) )
        {
        case 1 : nlua_map_tile_flip_x( L ); break;
        case 2 : nlua_map_tile_flip_y( L ); break;
        case 3 : nlua_map_tile_flip_xy( L ); break;
        default:
                break;
        }
        return 0;
}

static int nlua_map_tile_get_size( lua_State* L )
{
        map_tile* tile = nlua_to_pmap_tile( L, 1 );
        nv::lua::detail::push_coord( L, nv::ivec2( tile->size_x, tile->size_y ) );
        return 1;
}

static int nlua_map_tile_get_area( lua_State* L )
{
        map_tile* tile = nlua_to_pmap_tile( L, 1 );
        nv::lua::detail::push_area( L, nv::rectangle( nv::ivec2(1,1), nv::ivec2( tile->size_x, tile->size_y ) ) );
        return 1;
}

static int nlua_map_tile_expand( lua_State* L )
{
        // TODO: lots of error checking
        map_tile* tile = nlua_to_pmap_tile( L, 1 );
        // assert( tile^.ascii == nullptr );
        nv::vector< nv::uint8 > sizes_x = nlua_tobytearray( L, 2 );
        nv::vector< nv::uint8 > sizes_y;
        if ( lua_istable( L, 3 ) )
                sizes_y = nlua_tobytearray( L, 2 );
        else
                sizes_y.assign( sizes_x );

        nv::uint16 org_x = tile->size_x;
        nv::uint16 org_y = tile->size_y;
        nv::uint16 new_x = nv::uint16( nv::accumulate( sizes_x.begin(), sizes_x.end(), 0 ) );
        nv::uint16 new_y = nv::uint16( nv::accumulate( sizes_y.begin(), sizes_y.end(), 0 ) );

        nv::uint8* data = new nv::uint8[ new_x * new_y ];

        nv::uint16 line_count = 0;
        for ( nv::uint16 line = 0; line < org_y; ++line )
                for ( nv::uint16 count = 0; count < sizes_y[ line ]; ++count )
                {
                        nv::uint16 px = 0;
                        for ( nv::uint16 x = 0; x < org_x; ++x )
                                for ( nv::uint16 c = 0; c < sizes_x[ x ]; ++c )
                                {
                                        data[ px + line_count * new_x ] = tile->data[ x + line * org_x ];
                                        px++;
                                }
                        line_count++;
                }

        delete tile->data;
        tile->size_x = new_x;
        tile->size_y = new_y;
        tile->data   = data;
        return 0;
}

static int nlua_map_tile_raw_get( lua_State* L )
{
        map_tile* tile = reinterpret_cast<map_tile*>( lua_touserdata( L, 1 ) );
        if ( lua_type( L, 2 ) == LUA_TNUMBER )
        {
                lua_pushinteger( L, tile->data[ ( lua_tointeger( L, 2 ) - 1 ) + ( lua_tointeger( L, 3 ) - 1 ) * tile->size_x ] );
        }
        else
        {
                nv::ivec2 coord = nv::lua::detail::to_coord( L, 2 );
                lua_pushinteger( L, tile->data[ ( coord.x - 1 ) + ( coord.y - 1 ) * tile->size_x ] );
        }
        return 1;
}

static int nlua_map_tile_raw_set( lua_State* L )
{
        map_tile* tile = reinterpret_cast<map_tile*>( lua_touserdata( L, 1 ) );
        if ( lua_type( L, 2 ) == LUA_TNUMBER )
        {
                tile->data[ ( lua_tointeger( L, 2 ) - 1 ) + ( lua_tointeger( L, 3 ) - 1 ) * tile->size_x ] = nv::uint8( lua_tointeger( L, 3 ) );
        }
        else
        {
                nv::ivec2 coord = nv::lua::detail::to_coord( L, 2 );
                tile->data[ ( coord.x - 1 ) + ( coord.y - 1 ) * tile->size_x ] = nv::uint8( lua_tointeger( L, 3 ) );
        }
        return 0;
}

static int nlua_map_tile_ascii_get( lua_State* L )
{
        map_tile* tile = reinterpret_cast<map_tile*>( lua_touserdata( L, 1 ) );
        if ( lua_type( L, 2 ) == LUA_TNUMBER )
        {
                lua_pushinteger( L, tile->ascii[ ( lua_tointeger( L, 2 ) - 1 ) + ( lua_tointeger( L, 3 ) - 1 ) * tile->size_x ] );
        }
        else
        {
                nv::ivec2 coord = nv::lua::detail::to_coord( L, 2 );
                lua_pushinteger( L, tile->ascii[ ( coord.x - 1 ) + ( coord.y - 1 ) * tile->size_x ] );
        }
        return 1;
}

static int nlua_map_tile_ascii_set( lua_State* L )
{
        map_tile* tile = reinterpret_cast<map_tile*>( lua_touserdata( L, 1 ) );
        if ( lua_type( L, 2 ) == LUA_TNUMBER )
        {
                tile->ascii[ ( lua_tointeger( L, 2 ) - 1 ) + ( lua_tointeger( L, 3 ) - 1 ) * tile->size_x ] = nv::uint8( lua_tointeger( L, 3 ) );
        }
        else
        {
                nv::ivec2 coord = nv::lua::detail::to_coord( L, 2 );
                tile->ascii[ ( coord.x - 1 ) + ( coord.y - 1 ) * tile->size_x ] = nv::uint8( lua_tointeger( L, 3 ) );
        }
        return 0;
}

static int nlua_map_tile_gc( lua_State* L )
{
        map_tile* tile = reinterpret_cast<map_tile*>( lua_touserdata( L, 1 ) );
        if ( tile != nullptr )
        {
                delete tile->data;
                if ( tile->ascii ) delete tile->ascii;
        }
        return 0;
}

static const luaL_Reg nlua_map_tile_sf[] = {
        { "new",   nlua_map_tile_new },
        { NULL, NULL }
};

static const luaL_Reg nlua_map_tile_f[] = {
        { "place",      nlua_map_tile_place },
        { "clone",      nlua_map_tile_clone },
        { "flip_x",     nlua_map_tile_flip_x },
        { "flip_y",     nlua_map_tile_flip_y },
        { "flip_xy",    nlua_map_tile_flip_xy },
        { "flip_random",nlua_map_tile_flip_random },
        { "get_size",   nlua_map_tile_get_size },
        { "get_area",   nlua_map_tile_get_area },
        { "expand",     nlua_map_tile_expand },
        { "raw_get",    nlua_map_tile_raw_get },
        { "raw_set",    nlua_map_tile_raw_set },
        { "get_ascii",  nlua_map_tile_ascii_get },
        { "set_ascii",  nlua_map_tile_ascii_set },
        { "__gc",       nlua_map_tile_gc },
        { NULL, NULL }
};

void nv::lua::register_map_tile( lua_State * L )
{
        // TODO: check if __gc is used!
        luaL_newmetatable( L, NLUA_MAP_TILE_METATABLE );
        lua_pushvalue( L, -1 );
        lua_setfield( L, -2, "__index" );
        nlua_register( L, nlua_map_tile_f, -1 );

        lua_createtable( L, 0, 0 );
        nlua_register( L, "map_tile", nlua_map_tile_sf );
}