Initial commit from steward-fu releasemain

21 files changed, 4913 insertions, 0 deletions

diff --git a/modules/libgrbase/Makefile b/modules/libgrbase/Makefile
new file mode 100644
index 0000000..15174f8
--- /dev/null
+++ b/modules/libgrbase/Makefile
@@ -0,0 +1,660 @@
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new file mode 100644
index 0000000..f582d8a
--- /dev/null
+++ b/modules/libgrbase/Makefile.am
@@ -0,0 +1,14 @@
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new file mode 100644
index 0000000..af64156
--- /dev/null
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+	  if test -f $$file || test -d $$file; then d=.; else d=$(srcdir); fi; \
+	  if test -d $$d/$$file; then \
+	    dir=`echo "/$$file" | sed -e 's,/[^/]*$$,,'`; \
+	    if test -d "$(distdir)/$$file"; then \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    if test -d $(srcdir)/$$file && test $$d != $(srcdir); then \
+	      cp -fpR $(srcdir)/$$file "$(distdir)$$dir" || exit 1; \
+	      find "$(distdir)/$$file" -type d ! -perm -700 -exec chmod u+rwx {} \;; \
+	    fi; \
+	    cp -fpR $$d/$$file "$(distdir)$$dir" || exit 1; \
+	  else \
+	    test -f "$(distdir)/$$file" \
+	    || cp -p $$d/$$file "$(distdir)/$$file" \
+	    || exit 1; \
+	  fi; \
+	done
+check-am: all-am
+check: check-am
+all-am: Makefile $(LTLIBRARIES)
+installdirs:
+	for dir in "$(DESTDIR)$(libdir)"; do \
+	  test -z "$$dir" || $(MKDIR_P) "$$dir"; \
+	done
+install: install-am
+install-exec: install-exec-am
+install-data: install-data-am
+uninstall: uninstall-am
+
+install-am: all-am
+	@$(MAKE) $(AM_MAKEFLAGS) install-exec-am install-data-am
+
+installcheck: installcheck-am
+install-strip:
+	if test -z '$(STRIP)'; then \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	      install; \
+	else \
+	  $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \
+	    install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \
+	    "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \
+	fi
+mostlyclean-generic:
+
+clean-generic:
+	-test -z "$(CLEANFILES)" || rm -f $(CLEANFILES)
+
+distclean-generic:
+	-test -z "$(CONFIG_CLEAN_FILES)" || rm -f $(CONFIG_CLEAN_FILES)
+	-test . = "$(srcdir)" || test -z "$(CONFIG_CLEAN_VPATH_FILES)" || rm -f $(CONFIG_CLEAN_VPATH_FILES)
+
+maintainer-clean-generic:
+	@echo "This command is intended for maintainers to use"
+	@echo "it deletes files that may require special tools to rebuild."
+clean: clean-am
+
+clean-am: clean-generic clean-libLTLIBRARIES clean-libtool \
+	mostlyclean-am
+
+distclean: distclean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+distclean-am: clean-am distclean-compile distclean-generic \
+	distclean-tags
+
+dvi: dvi-am
+
+dvi-am:
+
+html: html-am
+
+html-am:
+
+info: info-am
+
+info-am:
+
+install-data-am:
+
+install-dvi: install-dvi-am
+
+install-dvi-am:
+
+install-exec-am: install-libLTLIBRARIES
+
+install-html: install-html-am
+
+install-html-am:
+
+install-info: install-info-am
+
+install-info-am:
+
+install-man:
+
+install-pdf: install-pdf-am
+
+install-pdf-am:
+
+install-ps: install-ps-am
+
+install-ps-am:
+
+installcheck-am:
+
+maintainer-clean: maintainer-clean-am
+	-rm -rf ./$(DEPDIR)
+	-rm -f Makefile
+maintainer-clean-am: distclean-am maintainer-clean-generic
+
+mostlyclean: mostlyclean-am
+
+mostlyclean-am: mostlyclean-compile mostlyclean-generic \
+	mostlyclean-libtool
+
+pdf: pdf-am
+
+pdf-am:
+
+ps: ps-am
+
+ps-am:
+
+uninstall-am: uninstall-libLTLIBRARIES
+
+.MAKE: install-am install-strip
+
+.PHONY: CTAGS GTAGS all all-am check check-am clean clean-generic \
+	clean-libLTLIBRARIES clean-libtool cscopelist ctags distclean \
+	distclean-compile distclean-generic distclean-libtool \
+	distclean-tags distdir dvi dvi-am html html-am info info-am \
+	install install-am install-data install-data-am install-dvi \
+	install-dvi-am install-exec install-exec-am install-html \
+	install-html-am install-info install-info-am \
+	install-libLTLIBRARIES install-man install-pdf install-pdf-am \
+	install-ps install-ps-am install-strip installcheck \
+	installcheck-am installdirs maintainer-clean \
+	maintainer-clean-generic mostlyclean mostlyclean-compile \
+	mostlyclean-generic mostlyclean-libtool pdf pdf-am ps ps-am \
+	tags uninstall uninstall-am uninstall-libLTLIBRARIES
+
+
+# Tell versions [3.59,3.63) of GNU make to not export all variables.
+# Otherwise a system limit (for SysV at least) may be exceeded.
+.NOEXPORT:
diff --git a/modules/libgrbase/bitwise_map.h b/modules/libgrbase/bitwise_map.h
new file mode 100644
index 0000000..fdcf990
--- /dev/null
+++ b/modules/libgrbase/bitwise_map.h
@@ -0,0 +1,34 @@
+/*
+ *  Copyright © 2006-2013 SplinterGU (Fenix/Bennugd)
+ *
+ *  This file is part of Bennu - Game Development
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty. In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *     1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *
+ *     2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *
+ *     3. This notice may not be removed or altered from any source
+ *     distribution.
+ *
+ */
+
+#ifndef __BITWISE_MAP_H
+#define __BITWISE_MAP_H
+
+#define bit_set(m,b)    (((uint32_t *)(m))[(b)>>5] |=   1<<((b)&0x1F))
+#define bit_clr(m,b)    (((uint32_t *)(m))[(b)>>5] &= ~(1<<((b)&0x1F)))
+#define bit_tst(m,b)    (((uint32_t *)(m))[(b)>>5] &   (1<<((b)&0x1F)))
+
+#endif
diff --git a/modules/libgrbase/g_bitmap.c b/modules/libgrbase/g_bitmap.c
new file mode 100644
index 0000000..db88afb
--- /dev/null
+++ b/modules/libgrbase/g_bitmap.c
@@ -0,0 +1,463 @@
+/*
+ *  Copyright © 2006-2016 SplinterGU (Fenix/Bennugd)
+ *  Copyright © 2002-2006 Fenix Team (Fenix)
+ *  Copyright © 1999-2002 José Luis Cebrián Pagüe (Fenix)
+ *
+ *  This file is part of Bennu - Game Development
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty. In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *     1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *
+ *     2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *
+ *     3. This notice may not be removed or altered from any source
+ *     distribution.
+ *
+ */
+
+/* --------------------------------------------------------------------------- */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "libgrbase.h"
+#include "bitwise_map.h"
+
+/* --------------------------------------------------------------------------- */
+
+uint32_t * map_code_bmp = NULL ;
+int map_code_allocated = 0 ;
+int map_code_last = 0;
+
+/* --------------------------------------------------------------------------- */
+
+PIXEL_FORMAT * bitmap_create_format( int bpp )
+{
+    PIXEL_FORMAT *format;
+
+    /* Allocate an empty pixel format structure */
+    format = malloc( sizeof( *format ) );
+    if ( !format ) return( NULL );
+
+    /* Set up the format */
+
+    format->palette = NULL;
+    format->depth = bpp;
+    format->depthb = ( bpp + 7 ) / 8;
+
+    if ( bpp == 32 )
+    {
+        format->Aloss = 0;
+        format->Rloss = 0;
+        format->Gloss = 0;
+        format->Bloss = 0;
+
+        format->Ashift = 24;
+        format->Rshift = 16;
+        format->Gshift = 8;
+        format->Bshift = 0;
+
+        format->Amask = 0xFF000000;
+        format->Rmask = 0x00FF0000;
+        format->Gmask = 0x0000FF00;
+        format->Bmask = 0x000000FF;
+    }
+    else if ( bpp > 8 )
+    {
+        /* R-G-B */
+        if ( bpp > 24 ) bpp = 24;
+
+        format->Rloss = 8 - ( bpp / 3 );
+        format->Gloss = 8 - ( bpp / 3 ) - ( bpp % 3 );
+        format->Bloss = 8 - ( bpp / 3 );
+
+        format->Rshift = (( bpp / 3 ) + ( bpp % 3 ) ) + ( bpp / 3 );
+        format->Gshift = ( bpp / 3 );
+        format->Bshift = 0;
+
+        format->Rmask = (( 0xFF >> format->Rloss ) << format->Rshift );
+        format->Gmask = (( 0xFF >> format->Gloss ) << format->Gshift );
+        format->Bmask = (( 0xFF >> format->Bloss ) << format->Bshift );
+    }
+    else
+    {
+        format->Rloss = 8;
+        format->Gloss = 8;
+        format->Bloss = 8;
+        format->Aloss = 8;
+
+        format->Rshift = 0;
+        format->Gshift = 0;
+        format->Bshift = 0;
+        format->Ashift = 0;
+
+        format->Rmask = 0;
+        format->Gmask = 0;
+        format->Bmask = 0;
+        format->Amask = 0;
+    }
+
+    return( format );
+}
+
+/* --------------------------------------------------------------------------- */
+
+GRAPH * bitmap_new_ex( int code, int w, int h, int depth, void * data, int pitch )
+{
+    GRAPH * gr ;
+    int wb ;
+
+    if ( w < 1 || h < 1 ) return NULL;
+
+    /* Create and fill the struct */
+
+    gr = ( GRAPH * ) malloc( sizeof( GRAPH ) ) ;
+    if ( !gr ) return NULL; // sin memoria
+
+    /* Calculate the row size (dword-aligned) */
+
+    wb = w * depth / 8;
+    if (( wb * 8 / depth ) < w ) wb++;
+
+    gr->data = data ;
+
+    gr->width = w ;
+    gr->height = h ;
+
+    gr->format = bitmap_create_format( depth ) ;
+
+    gr->pitch = pitch ;
+    gr->widthb = wb ;
+
+    gr->code = code ;
+    gr->name[ 0 ] = '\0';
+
+    gr->ncpoints = 0;
+    gr->cpoints = NULL ;
+
+    gr->format->palette = NULL ;
+
+    gr->blend_table = NULL ;
+
+    gr->modified = 0;
+    gr->info_flags = GI_EXTERNAL_DATA ;
+
+    return gr ;
+}
+
+/* --------------------------------------------------------------------------- */
+
+GRAPH * bitmap_new( int code, int w, int h, int depth )
+{
+    GRAPH * gr ;
+    int bytesPerRow, wb ;
+
+    if ( w < 1 || h < 1 ) return NULL;
+
+    /* Create and fill the struct */
+
+    gr = ( GRAPH * ) malloc( sizeof( GRAPH ) ) ;
+    if ( !gr ) return NULL; // sin memoria
+
+    /* Calculate the row size (dword-aligned) */
+
+    wb = w * depth / 8;
+    if (( wb * 8 / depth ) < w ) wb++;
+
+    bytesPerRow = wb;
+    if ( bytesPerRow & 0x03 ) bytesPerRow = ( bytesPerRow & ~3 ) + 4;
+
+    gr->data = ( char * ) malloc( h * bytesPerRow ) ;
+    if ( !gr->data )   // Sin memoria
+    {
+        free( gr );
+        return NULL;
+    }
+
+    gr->width = w ;
+    gr->height = h ;
+
+    gr->format = bitmap_create_format( depth ) ;
+
+    gr->pitch = bytesPerRow ;
+    gr->widthb = wb ;
+
+    gr->code = code ;
+    gr->name[ 0 ] = '\0';
+
+    gr->ncpoints = 0;
+    gr->cpoints = NULL ;
+
+    gr->format->palette = NULL ;
+
+    gr->blend_table = NULL ;
+
+    gr->modified = 0;
+    gr->info_flags = 0;
+
+    return gr ;
+}
+
+/* --------------------------------------------------------------------------- */
+
+GRAPH * bitmap_clone( GRAPH * map )
+{
+    GRAPH * gr ;
+    uint32_t y;
+
+    gr = bitmap_new( 0, map->width, map->height, map->format->depth ) ;
+    if ( gr == NULL ) return NULL;
+
+    for ( y = 0 ; y < map->height ; y++ )
+        memcpy(( uint8_t* ) gr->data + gr->pitch * y, ( uint8_t* ) map->data + gr->pitch * y, gr->widthb );
+
+    if ( map->cpoints )
+    {
+        gr->cpoints = malloc( sizeof( CPOINT ) * map->ncpoints ) ;
+        memcpy( gr->cpoints, map->cpoints, sizeof( CPOINT ) * map->ncpoints ) ;
+        gr->ncpoints = map->ncpoints ;
+    }
+
+    gr->blend_table = map->blend_table;
+    gr->info_flags = map->info_flags & ~GI_EXTERNAL_DATA ;
+    gr->modified = map->modified ;
+    gr->format->palette = map->format->palette ;
+    pal_use( map->format->palette );
+
+    memcpy( gr->name, map->name, sizeof( map->name ) ) ;
+
+    return gr ;
+}
+
+/* --------------------------------------------------------------------------- */
+
+void bitmap_add_cpoint( GRAPH * map, int x, int y )
+{
+    map->cpoints = ( CPOINT * ) realloc( map->cpoints, ( map->ncpoints + 1 ) * sizeof( CPOINT ) ) ;
+    map->cpoints[ map->ncpoints ].x = x ;
+    map->cpoints[ map->ncpoints ].y = y ;
+    map->ncpoints++;
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : bitmap_set_cpoint
+ *
+ *  Set a control point in a graphic
+ *
+ *  PARAMS :
+ *      map             Pointer to the bitmap
+ *      point           Control point index
+ *      x               New X coordinate or CPOINT_UNDEFINED to unset
+ *      y               New Y coordinate or CPOINT_UNDEFINED to unset
+ *
+ *  RETURN VALUE :
+ *      None
+ *
+ */
+
+void bitmap_set_cpoint( GRAPH * map, uint32_t point, int x, int y )
+{
+    uint32_t n;
+
+    if ( point < 0 ) return ;
+
+    if ( point == 0 && !map->modified ) map->modified = 1;
+
+    if ( map->ncpoints <= point )
+    {
+        map->cpoints = ( CPOINT * ) realloc( map->cpoints, ( point + 1 ) * sizeof( CPOINT ) ) ;
+        for ( n = map->ncpoints; n < point; n++ )
+        {
+            map->cpoints[ n ].x = CPOINT_UNDEFINED;
+            map->cpoints[ n ].y = CPOINT_UNDEFINED;
+        }
+        map->ncpoints = point + 1 ;
+    }
+    map->cpoints[ point ].x = x;
+    map->cpoints[ point ].y = y;
+}
+
+/* --------------------------------------------------------------------------- */
+
+void bitmap_destroy( GRAPH * map )
+{
+    if ( !map ) return ;
+
+    if ( map->cpoints ) free( map->cpoints ) ;
+
+    if ( map->code > 999 ) bit_clr( map_code_bmp, map->code - 1000 );
+
+    if ( map->data && !( map->info_flags & GI_EXTERNAL_DATA ) ) free( map->data ) ;
+
+    if ( map->format )
+    {
+        if ( map->format->palette ) pal_destroy( map->format->palette ) ;
+        free ( map->format );
+    }
+
+    free( map ) ;
+}
+
+/* --------------------------------------------------------------------------- */
+/* Análisis */
+
+void bitmap_analize( GRAPH * bitmap )
+{
+    uint32_t x, y;
+    int color_present = 0, tranparent_present = 0;
+
+    if ( bitmap->modified > 1 ) bitmap->modified = 1 ;
+
+    bitmap->info_flags &= ~( GI_CLEAN | GI_NOCOLORKEY );
+
+    /* Search for transparent pixels (value 0).
+     * If none found, set the flag GI_NOCOLORKEY */
+
+    switch ( bitmap->format->depth )
+    {
+        case    8:
+        {
+            uint8_t * ptr = ( uint8_t * ) bitmap->data ;
+            int inc = bitmap->pitch - bitmap->widthb ;
+
+            for ( y = bitmap->height; y--; ptr = ((( uint8_t * ) ptr ) + inc ) )
+            {
+                for ( x = bitmap->width; x--; ) {
+                    if ( *ptr ) color_present = 1;
+                    if ( !*ptr++ ) tranparent_present = 1;
+                }
+                if ( color_present && tranparent_present ) break;
+            }
+        }
+        break;
+        case    16:
+        {
+            int16_t * ptr = ( int16_t * ) bitmap->data ;
+            int inc = bitmap->pitch - bitmap->widthb ;
+
+            for ( y = bitmap->height; y--; ptr = ( int16_t * )((( uint8_t * ) ptr ) + inc ) )
+            {
+                for ( x = bitmap->width; x--; ) {
+                    if ( *ptr ) color_present = 1;
+                    if ( !*ptr++ ) tranparent_present = 1;
+                }
+                if ( color_present && tranparent_present ) break;
+            }
+        }
+        break;
+        case    32:
+        {
+            int32_t * ptr = ( int32_t * ) bitmap->data ;
+            int inc = bitmap->pitch - bitmap->widthb ;
+
+            for ( y = bitmap->height; y--; ptr = ( int32_t * )((( uint8_t * ) ptr ) + inc ) )
+            {
+                for ( x = bitmap->width; x--; ) {
+                    if ( ( *ptr & 0xff000000 ) != 0x00000000 ) color_present = 1;
+                    if ( !*ptr ) tranparent_present = 1;
+                    ptr++;
+                }
+                if ( color_present && tranparent_present ) break;
+            }
+        }
+    }
+
+    if ( color_present && !tranparent_present ) {
+        bitmap->info_flags |= GI_NOCOLORKEY ;
+    } else
+    if ( !color_present && tranparent_present ) {
+        bitmap->info_flags |= GI_CLEAN ;
+    }
+}
+
+/* --------------------------------------------------------------------------- */
+/* Returns the code of a new system library graph (1000+). Searchs
+   for free slots if the program creates too many system maps */
+
+int bitmap_next_code()
+{
+    int n, nb, lim, ini ;
+
+    // Si tengo suficientes alocados, retorno el siguiente segun map_code_last
+    if ( map_code_last < map_code_allocated )
+    {
+        if ( !bit_tst( map_code_bmp, map_code_last ) )
+        {
+            bit_set( map_code_bmp, map_code_last );
+            return 1000 + map_code_last++ ;
+        }
+    }
+
+    // Ya no tengo mas espacio, entonces busco alguno libre entre ~+32 desde el ultimo fijo y ~-32 del ultimo asignado
+
+    ini = ( map_code_last < map_code_allocated ) ? ( map_code_last >> 5 ) : 0 ;
+    lim = ( map_code_allocated >> 5 ) ;
+
+    while ( 1 )
+    {
+        for ( n = ini; n < lim ; n++ )
+        {
+            if ( map_code_bmp[n] != ( uint32_t ) 0xFFFFFFFF ) // Aca hay 1 libre, busco cual es
+            {
+                for ( nb = 0; nb < 32; nb++ )
+                {
+                    if ( !bit_tst( map_code_bmp + n, nb ) )
+                    {
+                        map_code_last = ( n << 5 ) + nb ;
+                        bit_set( map_code_bmp, map_code_last );
+                        return 1000 + map_code_last++ ;
+                    }
+                }
+            }
+        }
+        if ( !ini ) break;
+        lim = ini;
+        ini = 0;
+    }
+
+    map_code_last = map_code_allocated ;
+
+    // Increment space, no more slots availables
+    // 256 new maps available for alloc
+
+    map_code_allocated += 256 ;
+    map_code_bmp = ( uint32_t * ) realloc( map_code_bmp, sizeof( uint32_t ) * ( map_code_allocated >> 5 ) );
+
+    memset( &map_code_bmp[( map_code_last >> 5 )], 0, 32 );  /* 256 >> 5 = 8 * sizeof ( uint32_t ) = 8 * 4 = 32 */
+
+    // Devuelvo map_code_last e incremento en 1, ya que ahora tengo BLOCK_INCR mas que antes
+    bit_set( map_code_bmp, map_code_last );
+    return 1000 + map_code_last++ ;
+
+}
+
+/* --------------------------------------------------------------------------- */
+
+GRAPH * bitmap_new_syslib( int w, int h, int depth )
+{
+    GRAPH * gr ;
+
+    if ( !syslib ) return NULL;
+
+    gr = bitmap_new( 0, w, h, depth ) ;
+    if ( !gr ) return NULL;
+
+    gr->code = bitmap_next_code() ;
+    grlib_add_map( 0, gr ) ;
+
+    return gr ;
+}
+
+/* --------------------------------------------------------------------------- */
diff --git a/modules/libgrbase/g_bitmap.h b/modules/libgrbase/g_bitmap.h
new file mode 100644
index 0000000..d98bbe5
--- /dev/null
+++ b/modules/libgrbase/g_bitmap.h
@@ -0,0 +1,131 @@
+/*
+ *  Copyright © 2006-2013 SplinterGU (Fenix/Bennugd)
+ *  Copyright © 2002-2006 Fenix Team (Fenix)
+ *  Copyright © 1999-2002 José Luis Cebrián Pagüe (Fenix)
+ *
+ *  This file is part of Bennu - Game Development
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty. In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *     1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *
+ *     2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *
+ *     3. This notice may not be removed or altered from any source
+ *     distribution.
+ *
+ */
+
+#ifndef __BITMAP_H
+#define __BITMAP_H
+
+#include "g_pal.h"
+
+/* --------------------------------------------------------------------------- */
+
+#define GI_NOCOLORKEY       0x00000001  /* info_flags bits */
+#define GI_CLEAN            0x40000000  /* the graphic is clean (no data) */
+#define GI_EXTERNAL_DATA    0x80000000  /* data area is external, it don't belong to bitmap */
+
+#define GI_ANALIZE_MASK     GI_NOCOLORKEY
+
+#define CPOINT_UNDEFINED    32767       /* It's enough if X is set to this value */
+
+/* --------------------------------------------------------------------------- */
+
+typedef struct _cpoint
+{
+    short int x;
+    short int y;
+}
+CPOINT;
+
+typedef struct _pixel_format
+{
+    PALETTE * palette;  /* Palette for 8 bits graphics */
+
+    uint8_t  depth;       /* bits per pixel */
+    uint8_t  depthb;      /* bytes per pixel */
+
+    uint8_t  Rloss;
+    uint8_t  Gloss;
+    uint8_t  Bloss;
+    uint8_t  Aloss;
+
+    uint8_t  Rshift;
+    uint8_t  Gshift;
+    uint8_t  Bshift;
+    uint8_t  Ashift;
+
+    uint32_t Rmask;
+    uint32_t Gmask;
+    uint32_t Bmask;
+    uint32_t Amask;
+}
+PIXEL_FORMAT;
+
+typedef struct _bitmap
+{
+    int code;               /* Identifier of the graphic (in the graphic library) */
+    char name[ 64 ];        /* Name of the graphic */
+
+    uint32_t width;           /* Width of a bitmap frame in pixels */
+    uint32_t height;          /* Height of a bitmap frame in pixels */
+
+    uint32_t pitch;           /* Bytes of distance between bitmap lines */
+    uint32_t widthb;          /* Width of a bitmap frame in bytes */
+
+    PIXEL_FORMAT * format;  /* Pixel format */
+
+    /* Runtime use */
+    int modified;           /* 0 - bitmap not modified
+                               1 - bitmap is modified
+                               2 - bitmap is modified and needs analysis
+                             */
+    int info_flags;         /* Analysis result (see bitmap_analize) */
+
+    void * data;            /* Pointer to the bitmap data at current frame */
+
+    uint32_t ncpoints;        /* Number of control points */
+    CPOINT * cpoints;       /* Pointer to the control points ([0] = center) */
+
+    /* Blend Ops */
+    int16_t * blend_table;   /* Pointer to 16 bits blend table if any */
+
+    /* Linked list of all bitmaps in memory */
+/*
+    struct _bitmap * next;
+    struct _bitmap * prev;
+*/
+}
+GRAPH;
+
+/* --------------------------------------------------------------------------- */
+
+extern GRAPH * bitmap_new( int code, int w, int h, int depth );
+extern GRAPH * bitmap_new_ex( int code, int w, int h, int depth, void * data, int pitch );
+extern GRAPH * bitmap_clone( GRAPH * t );
+extern GRAPH * bitmap_new_syslib( int w, int h, int depth );
+extern void bitmap_destroy( GRAPH * map );
+extern void bitmap_destroy_fake( GRAPH * map );
+extern void bitmap_add_cpoint( GRAPH *map, int x, int y );
+extern void bitmap_set_cpoint( GRAPH * map, uint32_t point, int x, int y );
+extern void bitmap_analize( GRAPH * bitmap );
+
+extern PIXEL_FORMAT * bitmap_create_format( int bpp );
+
+extern int bitmap_next_code();
+
+/* --------------------------------------------------------------------------- */
+
+#endif
diff --git a/modules/libgrbase/g_blendop.c b/modules/libgrbase/g_blendop.c
new file mode 100644
index 0000000..d05784b
--- /dev/null
+++ b/modules/libgrbase/g_blendop.c
@@ -0,0 +1,448 @@
+/*
+ *  Copyright © 2006-2016 SplinterGU (Fenix/Bennugd)
+ *  Copyright © 2002-2006 Fenix Team (Fenix)
+ *  Copyright © 1999-2002 José Luis Cebrián Pagüe (Fenix)
+ *
+ *  This file is part of Bennu - Game Development
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty. In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *     1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *
+ *     2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *
+ *     3. This notice may not be removed or altered from any source
+ *     distribution.
+ *
+ */
+
+/* --------------------------------------------------------------------------- */
+
+#include <stdlib.h>
+#include "libgrbase.h"
+
+/* --------------------------------------------------------------------------- */
+
+/* Fast macros for color component extraction from a 16 bits value */
+
+#define GETR(color) (((color & sys_pixel_format->Rmask) >> sys_pixel_format->Rshift) << sys_pixel_format->Rloss)
+#define GETG(color) (((color & sys_pixel_format->Gmask) >> sys_pixel_format->Gshift) << sys_pixel_format->Gloss)
+#define GETB(color) (((color & sys_pixel_format->Bmask) >> sys_pixel_format->Bshift) << sys_pixel_format->Bloss)
+
+/* Fast macros for color composition */
+
+#define MAKERGB_SATURATE(r,g,b)                                             \
+    (                                                                           \
+            ((int)(r) > 255 ? sys_pixel_format->Rmask : (((int)(r) >> sys_pixel_format->Rloss) << sys_pixel_format->Rshift)) |    \
+            ((int)(g) > 255 ? sys_pixel_format->Gmask : (((int)(g) >> sys_pixel_format->Gloss) << sys_pixel_format->Gshift)) |    \
+            ((int)(b) > 255 ? sys_pixel_format->Bmask : (((int)(b) >> sys_pixel_format->Bloss) << sys_pixel_format->Bshift))      \
+    )
+
+#define MAKERGB(r,g,b)                                                  \
+    (                                                                       \
+            (((int)(r) >> sys_pixel_format->Rloss) << sys_pixel_format->Rshift) |   \
+            (((int)(g) >> sys_pixel_format->Gloss) << sys_pixel_format->Gshift) |   \
+            (((int)(b) >> sys_pixel_format->Bloss) << sys_pixel_format->Bshift)     \
+    )
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : blend_init
+ *
+ *  Initialize a blend table as a copy operation
+ *
+ *      Src_param   =   Src_color
+ *      Dst_param   =   0
+ *
+ *  PARAMS :
+ *      blend           Pointer to the blend table
+ *      amount         Color component factor (1.0f leaves source unchanged)
+ *
+ *  RETURN VALUE :
+ *      None
+ */
+
+void blend_init( int16_t * blend )
+{
+    int i;
+    int16_t * blend2;
+
+    if ( !blend ) return ;
+
+    blend2 = blend + 65536;
+
+    for ( i = 0; i < 65536; i++ )
+    {
+        *blend++ = i;
+        *blend2++ = 0;
+    }
+}
+
+/* --------------------------------------------------------------------------- */
+/* ************************* */
+/* Blendops public functions */
+/* ************************* */
+/*
+ *  FUNCTION : blend_create
+ *
+ *  Create a new blendop table and initialize it with blend_init
+ *  A blendop table is a group of two tables that return intermediate
+ *  colors to a composite (+) operation that does no saturation:
+ *
+ *      Src_param   =   Src_color
+ *      Dst_param   =   Dst_color
+ *      Dst_color   =   Src_param + Dst_param       // No clamp!
+ *
+ *  The other blend_x funcions change the Src_param and Dst_param formulas.
+ *  The Dst_color formula is immutable and embedded in the blitter
+ *
+ *  PARAMS :
+ *      None
+ *
+ *  RETURN VALUE :
+ *      Pointer to the new blendop table or NULL if not enough memory
+ */
+
+int16_t * blend_create( void )
+{
+    int16_t * blend = malloc( 65536 * 2 * sizeof( int16_t ) );
+    if ( !blend ) return NULL;
+
+    blend_init( blend );
+
+    return blend;
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : blend_apply
+ *
+ *  Apply a blend operation to the pixels of a graphic, as if it was
+ *  rendered into a black (color 0) background
+ *
+ *  PARAMS :
+ *      graph           Pointer to the graphic
+ *      blend           Pointer to the blend table
+ *
+ *  RETURN VALUE :
+ *      0               Error
+ *      1               OK
+ */
+
+void blend_apply( GRAPH * graph, int16_t * blend )
+{
+    uint16_t * ptr;
+    uint32_t x, y;
+    uint8_t * ptr8;
+    int16_t * blend2;
+
+    if ( !graph || !blend || graph->format->depth != 16 ) return ;
+
+    blend2 = blend + 65536;
+
+    ptr = ( uint16_t * ) (ptr8 = ( uint8_t * ) graph->data);
+    y = graph->height;
+    while ( y-- )
+    {
+        x = graph->width;
+        while ( x-- )
+        {
+            if ( *ptr ) * ptr = blend[ *ptr ] + blend2[ *ptr ];
+            ptr++;
+        }
+        ptr = ( uint16_t * ) (ptr8 += graph->pitch);
+    }
+
+    graph->modified = 2;
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : blend_assign
+ *
+ *  Assign a blend operation to a graphic. The graphic will be
+ *  drawn using this blend operation thereafter.
+ *
+ *  PARAMS :
+ *      graph           Pointer to the graphic
+ *      blend           Pointer to the blend table
+ *
+ *  RETURN VALUE :
+ *      None
+ */
+
+void blend_assign( GRAPH * graph, int16_t * blend )
+{
+    if ( !graph ) return ;
+    graph->blend_table = blend;
+    graph->modified = 1; /* Don't needs analysis */
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : blend_free
+ *
+ *  Free the memory used by a blendop table
+ *
+ *  PARAMS :
+ *      blend           Pointer to the blend table
+ *
+ *  RETURN VALUE :
+ *      None
+ */
+
+void blend_free( int16_t * blend )
+{
+    if ( !blend ) return ;
+    free( blend );
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : blend_grayscale
+ *
+ *  Initialize a blend table as a grayscale operation (changes the
+ *  color value of the source object to grayscale). Three methods
+ *  of operation are supported:
+ *
+ *      1.  Luminance:  result = 0.3R + 0.59G + 0.11B
+ *      2.  Desaturate: result = (MAX(R,G,B)+MIN(R,G,B))/2
+ *      3.  Maximum:    result = MAX(R,G,B)
+ *
+ *
+ *      Src_param   =   Grayscale_operation(previous Src_param)
+ *
+ *  PARAMS :
+ *      blend           Pointer to the blend table
+ *      method          Method of operation
+ *
+ *  RETURN VALUE :
+ *      0               Error
+ *      1               Ok
+ */
+
+void blend_grayscale( int16_t * blend, int method )
+{
+    int i, r, g, b, max, min;
+    int16_t * blend2;
+
+    if ( !blend ) return ;
+
+    switch ( method )
+    {
+        case 1:
+            blend2 = blend + 65536;
+
+            for ( i = 0; i < 65536; i++ )
+            {
+                r = ( int )( GETR( i ) * 0.3 );
+                g = ( int )( GETG( i ) * 0.59 );
+                b = ( int )( GETB( i ) * 0.11 );
+                r = r + g + b;
+                *blend++ = MAKERGB( r, r, r );
+                *blend2++ = 0;
+            }
+            break;
+
+        case 2:
+            blend2 = blend + 65536;
+
+            for ( i = 0; i < 65536; i++ )
+            {
+                r = GETR( i );
+                g = GETG( i );
+                b = GETB( i );
+
+            max = ( r > g ) ? ( r > b ) ? r : g : ( g > b ) ? g : b;
+            min = ( r < g ) ? ( r < b ) ? r : g : ( g < b ) ? g : b;
+
+                r = ( max + min ) / 2;
+                *blend++ = MAKERGB( r, r, r );
+                *blend2++ = 0;
+            }
+            break;
+
+        case 3:
+            blend2 = blend + 65536;
+
+            for ( i = 0; i < 65536; i++ )
+            {
+                r = GETR( i );
+                g = GETG( i );
+                b = GETB( i );
+
+            max = ( r > g ) ? ( r > b ) ? r : g : ( g > b ) ? g : b;
+
+                *blend++ = MAKERGB( max, max, max );
+                *blend2++ = 0;
+            }
+            break;
+    }
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : blend_translucency
+ *
+ *  Modify a blend table as a translucency combination operation
+ *
+ *      Src_param   =   (previous Src_param) * amount
+ *      Dst_param   =   Dst_color * (1.0 - amount)
+ *
+ *  PARAMS :
+ *      blend           Pointer to the blend table
+ *      amount         Opacity factor (1.0f = opaque, 0.0f = transparent)
+ *
+ *  RETURN VALUE :
+ *      None
+ */
+
+void blend_translucency( int16_t * blend, float amount )
+{
+    int i, r, g, b;
+    float amount2;
+    int16_t * blend2;
+
+    if ( !blend ) return ;
+
+    blend2 = blend + 65536;
+
+    if ( amount > 1.0f ) amount = 1.0f;
+    if ( amount < 0.0f ) amount = 0.0f;
+
+    amount = 1.0f - amount;
+    amount2 = 1.0f - amount;
+
+    for ( i = 0; i < 65536; i++ )
+    {
+        r = ( int )( GETR( *blend ) * amount );
+        g = ( int )( GETG( *blend ) * amount );
+        b = ( int )( GETB( *blend ) * amount );
+        *blend++ = MAKERGB( r, g, b );
+
+        r = ( int )( GETR( i ) * amount2 );
+        g = ( int )( GETG( i ) * amount2 );
+        b = ( int )( GETB( i ) * amount2 );
+        *blend2++ = MAKERGB( r, g, b );
+    }
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : blend_intensity
+ *
+ *  Modify a blend table as an intensity operation (changes the
+ *  color value of the source object as the factor amount but
+ *  does no transparency or other operation with the background)
+ *
+ *      Src_param   =   (previous Src_param) * amount
+ *
+ *  PARAMS :
+ *      blend           Pointer to the blend table
+ *      amount         Color component factor (1.0f leaves source unchanged)
+ *
+ *  RETURN VALUE :
+ *      None
+ */
+
+void blend_intensity( int16_t * blend, float amount )
+{
+    int i, r, g, b;
+
+    if ( !blend ) return ;
+
+    if ( amount < 0.0f ) amount = 0.0f;
+
+    for ( i = 65536; i--; )
+    {
+        r = ( int )( GETR( *blend ) * amount );
+        g = ( int )( GETG( *blend ) * amount );
+        b = ( int )( GETB( *blend ) * amount );
+        *blend++ = MAKERGB_SATURATE( r, g, b );
+    }
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : blend_swap
+ *
+ *  Swaps a blendop table. That is, change the blend operation so
+ *  the Dst_color and Src_color are exchanged in the formulas.
+ *
+ *  PARAMS :
+ *      blend           Pointer to the blend table
+ *
+ *  RETURN VALUE :
+ *      None
+ */
+
+void blend_swap( int16_t * blend )
+{
+    int i, j;
+    int16_t * blend2;
+
+    if ( !blend ) return ;
+
+    blend2 = blend + 65536;
+
+    for ( i = 65536; i--; )
+    {
+        j = *blend;
+        *blend++ = *blend2;
+        *blend2++ = j;
+    }
+}
+
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : blend_tint
+ *
+ *  Modify a blend table as a tint operation (changes the
+ *  color value of the source object as a combination of a given
+ *  color and the source color with the factor given)
+ *
+ *      Src_param = Const_color * amount
+ *                  + (previous Src_Param) * (1.0f-amount)
+ *
+ *  PARAMS :
+ *      blend           Pointer to the blend table
+ *      amount         Color component factor (1.0f = Full Const color)
+ *      cr              Constant color, red component (0-255)
+ *      cg              Constant color, green component (0-255)
+ *      cb              Constant color, blue component (0-255)
+ *
+ *  RETURN VALUE :
+ *      None
+ */
+
+void blend_tint( int16_t * blend, float amount, uint8_t cr, uint8_t cg, uint8_t cb )
+{
+    int i, r, g, b;
+
+    if ( !blend ) return ;
+
+    if ( amount > 1.0f ) amount = 1.0f;
+    if ( amount < 0.0f ) amount = 0.0f;
+
+    for ( i = 65536; i--; )
+    {
+        r = ( int )( amount * cr + ( 1.0f - amount ) * GETR( *blend ) );
+        g = ( int )( amount * cg + ( 1.0f - amount ) * GETG( *blend ) );
+        b = ( int )( amount * cb + ( 1.0f - amount ) * GETB( *blend ) );
+        *blend = MAKERGB_SATURATE( r, g, b );
+        blend++;
+    }
+}
+
+/* --------------------------------------------------------------------------- */
diff --git a/modules/libgrbase/g_blendop.h b/modules/libgrbase/g_blendop.h
new file mode 100644
index 0000000..1c97e17
--- /dev/null
+++ b/modules/libgrbase/g_blendop.h
@@ -0,0 +1,46 @@
+/*
+ *  Copyright © 2006-2013 SplinterGU (Fenix/Bennugd)
+ *  Copyright © 2002-2006 Fenix Team (Fenix)
+ *  Copyright © 1999-2002 José Luis Cebrián Pagüe (Fenix)
+ *
+ *  This file is part of Bennu - Game Development
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty. In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *     1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *
+ *     2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *
+ *     3. This notice may not be removed or altered from any source
+ *     distribution.
+ *
+ */
+
+#ifndef __BLEND_H
+#define __BLEND_H
+
+/* Blend ops */
+/* --------- */
+
+extern void blend_apply( GRAPH * bitmap, int16_t * blend ) ;
+extern void blend_assign( GRAPH * bitmap, int16_t * blend ) ;
+extern int16_t * blend_create( void ) ;
+extern void blend_free( int16_t * blend );
+extern void blend_grayscale( int16_t * blend, int method ) ;
+extern void blend_init( int16_t * blend ) ;
+extern void blend_intensity( int16_t * blend, float ammount ) ;
+extern void blend_swap( int16_t * blend ) ;
+extern void blend_tint( int16_t * blend, float ammount, uint8_t cr, uint8_t cg, uint8_t cb ) ;
+extern void blend_translucency( int16_t * blend, float ammount ) ;
+
+#endif
diff --git a/modules/libgrbase/g_clear.c b/modules/libgrbase/g_clear.c
new file mode 100644
index 0000000..7bb0603
--- /dev/null
+++ b/modules/libgrbase/g_clear.c
@@ -0,0 +1,222 @@
+/*
+ *  Copyright � 2006-2016 SplinterGU (Fenix/Bennugd)
+ *  Copyright � 2002-2006 Fenix Team (Fenix)
+ *  Copyright � 1999-2002 Jos� Luis Cebri�n Pag�e (Fenix)
+ *
+ *  This file is part of Bennu - Game Development
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty. In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *     1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *
+ *     2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *
+ *     3. This notice may not be removed or altered from any source
+ *     distribution.
+ *
+ */
+
+/* --------------------------------------------------------------------------- */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "libgrbase.h"
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : gr_clear
+ *
+ *  Clear a bitmap (paint all pixels as 0 [transparent])
+ *
+ *  PARAMS :
+ *      dest            Bitmap to clear
+ *
+ *  RETURN VALUE :
+ *      None
+ *
+ */
+
+void gr_clear( GRAPH * dest )
+{
+    memset( dest->data, 0, dest->pitch * dest->height ) ;
+
+    dest->modified = 1 ; /* Don't needs analysis */
+    dest->info_flags &= ~GI_NOCOLORKEY;
+    dest->info_flags |= GI_CLEAN;
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : gr_clear_as
+ *
+ *  Clear a bitmap (paint all pixels as the given color)
+ *
+ *  PARAMS :
+ *      dest            Bitmap to clear
+ *      color           8 or 16-bit color value
+ *
+ *  RETURN VALUE :
+ *      None
+ *
+ */
+
+void gr_clear_as( GRAPH * dest, int color )
+{
+    uint32_t y;
+
+    if ( !color )
+    {
+        gr_clear( dest );
+        return;
+    }
+
+    switch ( dest->format->depth )
+    {
+        case 8:
+        {
+            memset( dest->data, color, dest->pitch * dest->height ) ;
+            break;
+        }
+
+        case 16:
+        {
+            uint8_t * data = dest->data ;
+            int16_t * ptr ;
+            int n ;
+            y = dest->height;
+            while ( y-- )
+            {
+                ptr = ( int16_t * ) data;
+                n = dest->width;
+                while ( n-- ) * ptr++ = color ;
+                data += dest->pitch ;
+            }
+            break;
+        }
+
+        case 32:
+        {
+            uint8_t * data = dest->data ;
+            uint32_t * ptr ;
+            int n ;
+            y = dest->height;
+            while ( y-- )
+            {
+                ptr = ( uint32_t * ) data;
+                n = dest->width;
+                while ( n-- ) * ptr++ = color ;
+                data += dest->pitch ;
+            }
+            break;
+        }
+
+        case 1:
+        {
+            int c = color ? 0xFF : 0 ;
+            memset( dest->data, c, dest->pitch * dest->height ) ;
+            break;
+        }
+    }
+
+    dest->modified = 1 ; /* Don't needs analysis */
+    if ( dest->format->depth != 32 || ( color & 0xff000000 ) == 0xff000000 )
+        dest->info_flags |= GI_NOCOLORKEY;
+    else
+        dest->info_flags &= ~GI_NOCOLORKEY;
+    dest->info_flags &= ~GI_CLEAN;
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : gr_clear_region
+ *
+ *  Clear a region bitmap (paint all pixels as 0 [transparent])
+ *
+ *  PARAMS :
+ *      dest            Bitmap to clear
+ *      region          Region to clear or NULL for the whole screen
+ *
+ *  RETURN VALUE :
+ *      None
+ *
+ */
+
+void gr_clear_region( GRAPH * dest, REGION * region )
+{
+    REGION base_region ;
+    int y, l ;
+
+    if ( !dest ) dest = scrbitmap ;
+
+    if ( !region )
+    {
+        region = &base_region ;
+        region->x = 0 ;
+        region->y = 0 ;
+        region->x2 = dest->width - 1 ;
+        region->y2 = dest->height - 1 ;
+    }
+    else
+    {
+        base_region = *region ;
+        region = &base_region ;
+
+        region->x = MAX( MIN( region->x, region->x2 ), 0 ) ;
+        region->y = MAX( MIN( region->y, region->y2 ), 0 ) ;
+        region->x2 = MIN( MAX( region->x, region->x2 ), dest->width - 1 ) ;
+        region->y2 = MIN( MAX( region->y, region->y2 ), dest->height - 1 ) ;
+    }
+
+    if ( region->x > dest->width || region->y > dest->height ) return;
+    if ( region->x2 < 0 || region->y2 < 0 ) return;
+
+    switch ( dest->format->depth )
+    {
+        case 8:
+        case 16:
+        case 32:
+        {
+            uint8_t * data = (( uint8_t * ) dest->data ) + dest->pitch * region->y + region->x * dest->format->depthb;
+            l = ( region->x2 - region->x + 1 ) * dest->format->depthb;
+            for ( y = region->y; y <= region->y2; y++ )
+            {
+                memset( data, 0, l );
+                data += dest->pitch ;
+            }
+            break ;
+        }
+
+        case 1:
+        {
+            uint8_t * data = (( uint8_t * ) dest->data ) + region->x / 8 ;
+            l = ( region->x2 - region->x - 1 ) / 8 + 1 ;
+            for ( y = region->y; y <= region->y2; y++ )
+            {
+                /* Esta debe ser cambiada, por bits */
+                memset( data, 0, l ) ;
+                data += dest->pitch ;
+            }
+            break ;
+        }
+
+        default:
+            return;
+    }
+
+    dest->modified = 1 ; /* Don't needs analysis */
+    dest->info_flags &= ~GI_NOCOLORKEY;
+}
+
+/* --------------------------------------------------------------------------- */
diff --git a/modules/libgrbase/g_clear.h b/modules/libgrbase/g_clear.h
new file mode 100644
index 0000000..8b4684d
--- /dev/null
+++ b/modules/libgrbase/g_clear.h
@@ -0,0 +1,39 @@
+/*
+ *  Copyright © 2006-2013 SplinterGU (Fenix/Bennugd)
+ *  Copyright © 2002-2006 Fenix Team (Fenix)
+ *  Copyright © 1999-2002 José Luis Cebrián Pagüe (Fenix)
+ *
+ *  This file is part of Bennu - Game Development
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty. In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *     1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *
+ *     2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *
+ *     3. This notice may not be removed or altered from any source
+ *     distribution.
+ *
+ */
+
+#ifndef __CLEAR_H
+#define __CLEAR_H
+
+#include "bgdcore.h"
+#include "g_region.h"
+
+extern void gr_clear( GRAPH * dest );
+extern void gr_clear_as( GRAPH * dest, int color );
+extern void gr_clear_region( GRAPH * dest, REGION * region );
+
+#endif
diff --git a/modules/libgrbase/g_conversion.c b/modules/libgrbase/g_conversion.c
new file mode 100644
index 0000000..1add7ec
--- /dev/null
+++ b/modules/libgrbase/g_conversion.c
@@ -0,0 +1,481 @@
+/*
+ *  Copyright © 2006-2016 SplinterGU (Fenix/Bennugd)
+ *  Copyright © 2002-2006 Fenix Team (Fenix)
+ *  Copyright © 1999-2002 José Luis Cebrián Pagüe (Fenix)
+ *
+ *  This file is part of Bennu - Game Development
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty. In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *     1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *
+ *     2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *
+ *     3. This notice may not be removed or altered from any source
+ *     distribution.
+ *
+ */
+
+/* --------------------------------------------------------------------------- */
+
+#include <stdlib.h>
+#include "libgrbase.h"
+
+#include "bgddl.h"
+#include "dlvaracc.h"
+
+/* --------------------------------------------------------------------------- */
+
+/* Conversion tables - used by 16 bits conversions - 256K */
+static uint16_t * convert565ToScreen = NULL ;
+static uint16_t * convertScreenTo565 = NULL ;
+static int conversion_tables_ok = 0 ;
+
+/* Alpha multiplication tables - multiply a color by its alpha.
+ * There will be less than 256 levels
+ */
+static uint16_t * alpha16[ 256 ];
+static uint8_t * alpha8[ 256 ];
+static int alpha16_tables_ok = 0 ;
+static int alpha8_tables_ok = 0 ;
+
+/* --------------------------------------------------------------------------- */
+/* used for variable access                                                    */
+/* --------------------------------------------------------------------------- */
+
+enum {
+    ALPHA_STEPS = 0
+};
+
+/* --------------------------------------------------------------------------- */
+/* Son las variables que se desea acceder.                                     */
+/* El interprete completa esta estructura, si la variable existe.              */
+/* (usada en tiempo de ejecucion)                                              */
+
+DLVARFIXUP __bgdexport( libgrbase, globals_fixup )[] =
+{
+    /* Nombre de variable global, puntero al dato, tamaño del elemento, cantidad de elementos */
+    { "alpha_steps" , NULL, -1, -1 },
+    { NULL , NULL, -1, -1 }
+};
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : init_alpha16_tables
+ *
+ *  Init the 16 bit alpha tables (create as many tables as the parameter)
+ *  Each alpha table has a 128K memory footprint. Having many alpha tables
+ *  provides more transparency values.
+ *
+ *  PARAMS :
+ *  count   Number of tables
+ *
+ *  RETURN VALUE :
+ *      None
+ *
+ */
+
+static void init_alpha16_tables( int count )
+{
+    int i, color, inc, next = 0, factor;
+    uint16_t * table16 = NULL;
+
+    if ( count <= 0 ) count = 1;
+    if ( count > 128 ) count = 128;
+
+    if ( alpha16_tables_ok == count ) return ;
+
+    inc = 256 / count;
+
+    /* Destroy existing tables */
+
+    if ( alpha16_tables_ok )
+    {
+        for ( table16 = NULL, i = 0 ; i < 256 ; i++ )
+        {
+            if ( alpha16[ i ] != table16 )
+            {
+                table16 = alpha16[ i ];
+                free( table16 );
+            }
+            alpha16[ i ] = NULL;
+        }
+    }
+
+    /* Make new ones */
+
+    for ( i = 0 ; i < 256 ; i++ )
+    {
+        if ( i == next )
+        {
+            table16 = malloc( 131072 );
+            factor = next + inc / 2;
+            next += inc;
+            if ( factor > 255 ) factor = 256;
+
+            for ( color = 0 ; color < 65536 ; color++ )
+            {
+                int r = (( color & sys_pixel_format->Rmask ) >> sys_pixel_format->Rshift << sys_pixel_format->Rloss ) ;
+                int g = (( color & sys_pixel_format->Gmask ) >> sys_pixel_format->Gshift << sys_pixel_format->Gloss ) ;
+                int b = (( color & sys_pixel_format->Bmask ) >> sys_pixel_format->Bshift << sys_pixel_format->Bloss ) ;
+
+                table16[ color ] =
+                    (((( r * factor ) >> 8 ) >> sys_pixel_format->Rloss ) << sys_pixel_format->Rshift ) |
+                    (((( g * factor ) >> 8 ) >> sys_pixel_format->Gloss ) << sys_pixel_format->Gshift ) |
+                    (((( b * factor ) >> 8 ) >> sys_pixel_format->Bloss ) << sys_pixel_format->Bshift ) ;
+            }
+        }
+        alpha16[ i ] = table16;
+    }
+
+    alpha16_tables_ok = count;
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : init_alpha8_tables
+ *
+ *  Init the 8 bit alpha tables (create as many tables as the parameter)
+ *  Each alpha table has a 64K memory footprint. Having many alpha tables
+ *  provides more transparency values. Those tables should be updated
+ *  when the palette changes.
+ *
+ *  PARAMS :
+ *  count   Number of tables
+ *
+ *  RETURN VALUE :
+ *      None
+ *
+ */
+
+static void init_alpha8_tables( int count )
+{
+    int i, color, color2, inc, next = 0, factor;
+    uint8_t * table8 = NULL;
+    rgb_component * rgb ;
+
+    if ( count <= 0 ) count = 1;
+    if ( count > 128 ) count = 128;
+
+    if ( alpha16_tables_ok == count ) return ;
+
+    inc = 256 / count;
+
+    /* Destroy existing tables */
+
+    if ( alpha8_tables_ok )
+    {
+        for ( table8 = NULL, i = 0; i < 256; i++ )
+        {
+            if ( alpha8[ i ] != table8 )
+            {
+                table8 = alpha8[ i ];
+                free( table8 );
+            }
+            alpha8[ i ] = NULL;
+        }
+    }
+
+    /* Make new ones */
+
+    if ( !sys_pixel_format->palette )
+        rgb = ( rgb_component * ) default_palette;
+    else
+        rgb = sys_pixel_format->palette->rgb ;
+
+    for ( i = 0; i < 256; i++ )
+    {
+        if ( i == next )
+        {
+            table8 = malloc( 65536 );
+            factor = next + inc / 2;
+            next += inc;
+            if ( factor > 255 ) factor = 255;
+
+            for ( color = 0; color < 256; color++ )
+            {
+                for ( color2 = 0; color2 < 256; color2++ )
+                {
+                    int r = ( rgb[ color ].r * factor + rgb[ color2 ].r * ( 255 - factor ) ) >> 8 ;
+                    int g = ( rgb[ color ].g * factor + rgb[ color2 ].g * ( 255 - factor ) ) >> 8 ;
+                    int b = ( rgb[ color ].b * factor + rgb[ color2 ].b * ( 255 - factor ) ) >> 8 ;
+                    table8[( color << 8 ) + color2 ] = gr_find_nearest_color( r, g, b );
+                }
+                table8[ color ] = color;
+            }
+        }
+        alpha8[ i ] = table8;
+    }
+
+    alpha8_tables_ok = count;
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : init_conversion_tables
+ *
+ *  Static routine used to initialize the 16 bits conversion
+ *  tables (this only needs to be done once)
+ *
+ *  PARAMS :
+ *  None
+ *
+ *  RETURN VALUE :
+ *      None
+ *
+ */
+
+static void init_conversion_tables()
+{
+    uint8_t r, g, b ;
+    int n ;
+
+    /* Alloc space for the lookup tables */
+
+    convert565ToScreen = ( uint16_t * ) malloc( sizeof( uint16_t ) * 65536 );
+    if ( !convert565ToScreen ) return ;
+
+    convertScreenTo565 = ( uint16_t * ) malloc( sizeof( uint16_t ) * 65536 );
+    if ( !convertScreenTo565 )  // No memory
+    {
+        free( convert565ToScreen );
+        return ;
+    }
+
+    /* Special case if screen already in 565 format */
+
+    if ( sys_pixel_format->Rmask == 0xF800 &&
+            sys_pixel_format->Gmask == 0x07E0 &&
+            sys_pixel_format->Bmask == 0x001F )
+    {
+        for ( n = 0; n < 65536; n++ )
+        {
+            convert565ToScreen[ n ] = n;
+            convertScreenTo565[ n ] = n;
+        }
+        return ;
+    }
+
+    /* Create a fast lookup array */
+
+    for ( n = 0; n < 65536; n++ )
+    {
+        /* Calculate conversion from 565 to screen format */
+
+        r = (( n >> 8 ) & 0xF8 ) >> sys_pixel_format->Rloss ;
+        g = (( n >> 3 ) & 0xFC ) >> sys_pixel_format->Gloss ;
+        b = (( n << 3 ) & 0xF8 ) >> sys_pixel_format->Bloss ;
+
+        convert565ToScreen[ n ] = ( r << sys_pixel_format->Rshift ) | ( g << sys_pixel_format->Gshift ) | ( b << sys_pixel_format->Bshift ) ;
+
+        /* Calculate conversion from 565 to screen format */
+
+        r = ((( n & sys_pixel_format->Rmask ) >> sys_pixel_format->Rshift ) << sys_pixel_format->Rloss );
+        g = ((( n & sys_pixel_format->Gmask ) >> sys_pixel_format->Gshift ) << sys_pixel_format->Gloss );
+        b = ((( n & sys_pixel_format->Bmask ) >> sys_pixel_format->Bshift ) << sys_pixel_format->Bloss );
+
+        convertScreenTo565[ n ] = (( r & 0xF8 ) << 8 ) | (( g & 0xFC ) << 3 ) | (( b & 0xF8 ) >> 3 ) ;
+    }
+    conversion_tables_ok = 1;
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : gr_convert16_565ToScreen
+ *
+ *  Convert a sequence of 16 bits pixels from 5:6:5 format to
+ *  the format used by the screen (usually 5:5:5 or 5:6:5)
+ *
+ *  PARAMS :
+ *  ptr    Pointer to the first pixel
+ *  len    Number of pixels (not bytes!)
+ *
+ *  RETURN VALUE :
+ *      None
+ *
+ */
+
+void gr_convert16_565ToScreen( uint16_t * ptr, int len )
+{
+    if ( !conversion_tables_ok ) init_conversion_tables();
+
+    while ( len-- )
+    {
+        *ptr = convert565ToScreen[ *ptr ] ;
+        ptr++;
+    }
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : gr_convert16_ScreenTo565
+ *
+ *  Convert a sequence of 16 bits pixels in screen format
+ *  (usually 5:5:5 or 5:6:5) to the 5:6:5 format used to
+ *  store 16 bits pixel values to files in disk
+ *
+ *  PARAMS :
+ *  ptr    Pointer to the first pixel
+ *  len    Number of pixels (not bytes!)
+ *
+ *  RETURN VALUE :
+ *      None
+ *
+ */
+
+void gr_convert16_ScreenTo565( uint16_t * ptr, int len )
+{
+    if ( !conversion_tables_ok ) init_conversion_tables();
+
+    while ( len-- )
+    {
+        *ptr = convertScreenTo565[ *ptr ] ;
+        ptr++;
+    }
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : gr_fade16
+ *
+ *  Fade a 16-bit graphic a given ammount. Fading values are given in percent
+ *  (0% = black, 100% = original color, 200% = full color value)
+ *
+ *  PARAMS :
+ *  graph   Pointer to the graphic object
+ *  r    Percent of Red component
+ *  g    Percent of Green component
+ *  b    Percent of Blue component
+ *
+ *  RETURN VALUE :
+ *      None
+ *
+ */
+
+void gr_fade16( GRAPH * graph, int r, int g, int b )
+{
+    uint32_t Rtable[ 32 ];
+    uint32_t Gtable[ 32 ];
+    uint32_t Btable[ 32 ];
+    uint32_t x, y;
+    uint32_t Rmask;
+    uint32_t Rshift;
+    uint32_t Gmask;
+    uint32_t Gshift;
+    uint32_t Bmask;
+    uint32_t Bshift;
+
+    for ( x = 0 ; x < 32 ; x++ )
+    {
+        int c = 8 * x + 7;
+
+        if ( r <= 100 )
+            Rtable[ x ] = ( c * r / 100 ) >> sys_pixel_format->Rloss << sys_pixel_format->Rshift;
+        else
+            Rtable[ x ] = ( c + ( 255 - c ) * ( r - 100 ) / 100 ) >> sys_pixel_format->Rloss << sys_pixel_format->Rshift;
+
+        if ( g <= 100 )
+            Gtable[ x ] = ( c * g / 100 ) >> sys_pixel_format->Gloss << sys_pixel_format->Gshift;
+        else
+            Gtable[ x ] = ( c + ( 255 - c ) * ( g - 100 ) / 100 ) >> sys_pixel_format->Gloss << sys_pixel_format->Gshift;
+
+        if ( b <= 100 )
+            Btable[ x ] = ( c * b / 100 ) >> sys_pixel_format->Bloss << sys_pixel_format->Bshift;
+        else
+            Btable[ x ] = ( c + ( 255 - c ) * ( b - 100 ) / 100 ) >> sys_pixel_format->Bloss << sys_pixel_format->Bshift;
+    }
+
+    Rmask = sys_pixel_format->Rmask;
+    Gmask = sys_pixel_format->Gmask;
+    Bmask = sys_pixel_format->Bmask;
+
+    Rshift = sys_pixel_format->Rshift - sys_pixel_format->Rloss + 3;
+    Gshift = sys_pixel_format->Gshift - sys_pixel_format->Gloss + 3;
+    Bshift = sys_pixel_format->Bshift - sys_pixel_format->Bloss + 3;
+
+    if ( graph->format->depth == 16 )
+    {
+        char * p = graph->data ;
+        uint16_t * ptr ;
+
+        for ( y = 0 ; y < graph->height ; y++ )
+        {
+            ptr = ( uint16_t * ) p ;
+
+            for ( x = 0 ; x < graph->width ; x++, ptr++ )
+            {
+                *ptr = ( Rtable[(( *ptr & Rmask ) >> Rshift )] | Gtable[(( *ptr & Gmask ) >> Gshift )] | Btable[(( *ptr & Bmask ) >> Bshift )] );
+            }
+            p += graph->pitch ;
+        }
+    }
+    else if ( graph->format->depth == 32 )
+    {
+        char * p = graph->data ;
+        uint32_t * ptr ;
+
+        for ( y = 0 ; y < graph->height ; y++ )
+        {
+            ptr = ( uint32_t * ) p ;
+            for ( x = 0 ; x < graph->width ; x++, ptr++ )
+            {
+                *ptr = ( Rtable[(( *ptr & Rmask ) >> Rshift )] | Gtable[(( *ptr & Gmask ) >> Gshift )] | Btable[(( *ptr & Bmask ) >> Bshift )] );
+            }
+            p += graph->pitch ;
+        }
+    }
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : gr_alpha16
+ *
+ *  Get an alpha multiplication table (a table that, given a 16 bit color,
+ *  returns the color multiplied by the alpha value)
+ *
+ *  PARAMS :
+ *  alpha   Alpha value for the requested table
+ *
+ *  RETURN VALUE :
+ *      None
+ *
+ */
+
+uint16_t * gr_alpha16( int alpha )
+{
+    if ( !alpha16_tables_ok ) init_alpha16_tables( GLODWORD( libgrbase, ALPHA_STEPS ) );
+    return alpha16[ alpha ];
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : gr_alpha8
+ *
+ *  Get an alpha translation table (a table that, given two 8 bit color,
+ *  returns the composite color given the alpha value)
+ *
+ *  PARAMS :
+ *  alpha   Alpha value for the requested table
+ *
+ *  RETURN VALUE :
+ *      None
+ *
+ */
+
+uint8_t * gr_alpha8( int alpha )
+{
+    if ( !alpha8_tables_ok ) init_alpha8_tables( GLODWORD( libgrbase, ALPHA_STEPS ) );
+    return ( uint8_t * ) alpha8[ alpha ];
+}
+
+/* --------------------------------------------------------------------------- */
diff --git a/modules/libgrbase/g_conversion.h b/modules/libgrbase/g_conversion.h
new file mode 100644
index 0000000..2b64e60
--- /dev/null
+++ b/modules/libgrbase/g_conversion.h
@@ -0,0 +1,40 @@
+/*
+ *  Copyright © 2006-2013 SplinterGU (Fenix/Bennugd)
+ *  Copyright © 2002-2006 Fenix Team (Fenix)
+ *  Copyright © 1999-2002 José Luis Cebrián Pagüe (Fenix)
+ *
+ *  This file is part of Bennu - Game Development
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty. In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *     1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *
+ *     2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *
+ *     3. This notice may not be removed or altered from any source
+ *     distribution.
+ *
+ */
+
+#ifndef __CONVERSION_H
+#define __CONVERSION_H
+
+/* Rutinas de conversión entre formatos */
+
+extern void gr_convert16_ScreenTo565( uint16_t * ptr, int len );
+extern void gr_convert16_565ToScreen( uint16_t * ptr, int len );
+extern void gr_fade16( GRAPH * graph, int r, int g, int b );
+extern uint16_t * gr_alpha16( int alpha );
+extern uint8_t * gr_alpha8( int alpha );
+
+#endif
diff --git a/modules/libgrbase/g_grlib.c b/modules/libgrbase/g_grlib.c
new file mode 100644
index 0000000..fdb4fe5
--- /dev/null
+++ b/modules/libgrbase/g_grlib.c
@@ -0,0 +1,353 @@
+/*
+ *  Copyright © 2006-2016 SplinterGU (Fenix/Bennugd)
+ *  Copyright © 2002-2006 Fenix Team (Fenix)
+ *  Copyright © 1999-2002 José Luis Cebrián Pagüe (Fenix)
+ *
+ *  This file is part of Bennu - Game Development
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty. In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *     1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *
+ *     2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *
+ *     3. This notice may not be removed or altered from any source
+ *     distribution.
+ *
+ */
+
+/* --------------------------------------------------------------------------- */
+
+#include <stdlib.h>
+#include <string.h>
+
+#include "libgrbase.h"
+#include "bitwise_map.h"
+
+/* --------------------------------------------------------------------------- */
+
+GRLIB * syslib = 0 ;
+
+static uint32_t * libs_bmp = NULL ;
+static int libs_allocated = 0 ;
+static int libs_last = 0;
+static GRLIB ** libs = NULL;
+
+/* --------------------------------------------------------------------------- */
+
+static GRLIB * grlib_create() ;
+
+/* --------------------------------------------------------------------------- */
+
+int grlib_newid()
+{
+    int n, nb, lim, ini ;
+
+    // Si tengo suficientes alocados, retorno el siguiente segun libs_last
+    if ( libs_last < libs_allocated )
+    {
+        if ( !bit_tst( libs_bmp, libs_last ) )
+        {
+            bit_set( libs_bmp, libs_last );
+            return libs_last++ ;
+        }
+    }
+
+    // Ya no tengo mas espacio, entonces busco alguno libre entre ~+32 desde el ultimo fijo y ~-32 del ultimo asignado
+
+    ini = ( libs_last < libs_allocated ) ? ( libs_last >> 5 ) : 0 ;
+    lim = ( libs_allocated >> 5 ) ;
+
+    while ( 1 )
+    {
+        for ( n = ini; n < lim ; n++ )
+        {
+            if ( libs_bmp[n] != ( uint32_t ) 0xFFFFFFFF ) // Aca hay 1 libre, busco cual es
+            {
+                for ( nb = 0; nb < 32; nb++ )
+                {
+                    if ( !bit_tst( libs_bmp + n, nb ) )
+                    {
+                        libs_last = ( n << 5 ) + nb ;
+                        bit_set( libs_bmp, libs_last );
+                        return libs_last++ ;
+                    }
+                }
+            }
+        }
+        if ( !ini ) break;
+        lim = ini;
+        ini = 0;
+    }
+
+    libs_last = libs_allocated ;
+
+    /* Increment space, no more slots availables
+       256 new maps available for alloc */
+
+    libs_allocated += 256 ;
+    libs_bmp = ( uint32_t * ) realloc( libs_bmp, sizeof( uint32_t ) * ( libs_allocated >> 5 ) );
+    memset( &libs_bmp[( libs_last >> 5 )], 0, 32 );  /* 256 >> 5 = 8 * sizeof ( uint32_t ) = 8 * 4 = 32 */
+
+    libs = ( GRLIB ** ) realloc( libs, sizeof( GRLIB * ) * libs_allocated );
+    memset( &libs[ libs_last ], 0, sizeof( GRLIB * ) * 256 );
+
+    /* Devuelvo libs_last e incremento en 1, ya que ahora tengo BLOCK_INCR mas que antes */
+    bit_set( libs_bmp, libs_last );
+
+    return libs_last++ ;
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : grlib_new
+ *
+ *  Create a new library
+ *
+ *  PARAMS :
+ *  None
+ *
+ *  RETURN VALUE :
+ *      ID of the new library or -1 if error
+ */
+
+int grlib_new()
+{
+    GRLIB * lib = grlib_create() ;
+    int i ;
+
+    if ( !lib ) return -1;
+
+    i = grlib_newid();
+    libs[ i ] = lib;
+
+    return ( i );
+}
+
+/* --------------------------------------------------------------------------- */
+/* Static convenience function */
+
+static GRLIB * grlib_create()
+{
+    GRLIB * lib ;
+
+    lib = ( GRLIB * ) malloc( sizeof( GRLIB ) ) ;
+    if ( !lib ) return 0 ;
+
+    lib->maps = ( GRAPH ** ) calloc( 32, sizeof( GRAPH * ) ) ;
+    if ( !lib->maps )
+    {
+        free( lib );
+        return 0 ;
+    }
+
+    lib->name[ 0 ] = 0 ;
+    lib->map_reserved = 32 ;
+
+    return lib ;
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : grlib_get
+ *
+ *  Get a pointer to an library in memory given the internal ID
+ *
+ *  PARAMS :
+ *  libid   Library code
+ *
+ *  RETURN VALUE :
+ *      Pointer to the object required or NULL if it does not exist
+ */
+
+GRLIB * grlib_get( int libid )
+{
+    if ( libid < 0 || libid >= libs_allocated ) return 0 ;
+    return libs[ libid ] ;
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : grlib_destroy
+ *
+ *  Remove a library and all its maps from memory
+ *
+ *  PARAMS :
+ *  libid   ID of the library
+ *
+ *  RETURN VALUE :
+ *      0 if there wasn't a map with this code, 1 otherwise
+ */
+
+void grlib_destroy( int libid )
+{
+    int i ;
+    GRLIB * lib = grlib_get( libid ) ;
+    if ( !lib ) return ;
+
+    libs[ libid ] = 0 ;
+
+    for ( i = 0; i < lib->map_reserved; i++ ) bitmap_destroy( lib->maps[ i ] ) ;
+
+    free( lib->maps ) ;
+    free( lib ) ;
+
+    bit_clr( libs_bmp, libid );
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : grlib_unload_map
+ *
+ *  Remove a map from a library, if present
+ *
+ *  PARAMS :
+ *  libid   ID of the library
+ *  mapcode   ID of the map
+ *
+ *  RETURN VALUE :
+ *      0 if there wasn't a map with this code, 1 otherwise
+ */
+
+int grlib_unload_map( int libid, int mapcode )
+{
+    GRLIB * lib ;
+
+    if ( mapcode < 1 || mapcode > 999 )
+        lib = syslib ;
+    else
+        lib = grlib_get( libid ) ;
+
+    if ( lib == NULL ) return 0 ;
+
+    if ( lib->map_reserved <= mapcode ) return 0 ;
+    if ( !lib->maps[ mapcode ] ) return 0 ;
+
+    bitmap_destroy( lib->maps[ mapcode ] ) ;
+    lib->maps[ mapcode ] = 0 ;
+    return 1 ;
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : grlib_add_map
+ *
+ *  Add a map to a graphic library. If any map with the same code
+ *  is in the library, it will be unload first
+ *
+ *  PARAMS :
+ *  lib    Pointer to the library
+ *  map    Pointer to the graphic
+ *         (fill map->code first!)
+ *
+ *  RETURN VALUE :
+ *      -1 if error, a number >= 0 otherwise
+ */
+
+int grlib_add_map( int libid, GRAPH * map )
+{
+    GRLIB * lib ;
+
+    if ( map->code < 1 || map->code > 999 )
+        lib = syslib ;
+    else
+        lib = grlib_get( libid ) ;
+
+    if ( !lib ) return -1 ;
+    if ( map->code < 0 ) return -1 ;
+
+    if ( map->code > 0 ) grlib_unload_map( libid, map->code ) ;
+
+    if ( lib->map_reserved <= map->code )
+    {
+        GRAPH ** lmaps;
+        int new_reserved = ( map->code & ~0x001F ) + 32 ;
+
+        lmaps = ( GRAPH ** ) realloc( lib->maps, sizeof( GRAPH* ) * new_reserved ) ;
+        if ( !lmaps ) return -1; // No memory
+        lib->maps = lmaps;
+
+        memset( lib->maps + lib->map_reserved, 0, ( new_reserved - lib->map_reserved ) * sizeof( GRAPH * ) ) ;
+        lib->map_reserved = new_reserved ;
+    }
+
+    lib->maps[ map->code ] = map ;
+
+    return map->code ;
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : bitmap_get
+ *
+ *  Get a bitmap using the DIV syntax (libcode, mapcode)
+ *
+ *  PARAMS :
+ *  libid   Library code or 0 for system/global bitmap
+ *  mapcode   Code of the bitmap
+ *
+ *  RETURN VALUE :
+ *      Pointer to the graphic required or NULL if not found
+ *
+ *  (0, -1) gets the scrbitmap graphic (undocumented!)
+ *  (0,  0) gets the background
+ *
+ */
+
+GRAPH * bitmap_get( int libid, int mapcode )
+{
+    GRLIB * lib = NULL ;
+
+    if ( !libid )
+    {
+        /* Using (0, 0) we can get the background map */
+        if ( !mapcode ) return background ;
+
+        /* Using (0, -1) we can get the screen bitmap (undocumented bug/feature) */
+        if ( mapcode == -1 ) return scrbitmap ;
+    }
+
+    /* Get the map from the system library
+     * (the only one that can have more than 1000 maps)
+     */
+    if ( mapcode > 999 ) lib = syslib ;
+
+    if ( !lib ) lib = grlib_get( libid ) ;
+
+    /* Get the map from a library */
+
+    if ( lib && lib->map_reserved > mapcode && mapcode >= 0 ) return lib->maps[ mapcode ] ;
+
+    return 0 ;
+}
+
+/* --------------------------------------------------------------------------- */
+/*
+ *  FUNCTION : grlib_init
+ *
+ *  Create the system library. This should be called at program startup.
+ *
+ *  PARAMS :
+ *  None
+ *
+ *  RETURN VALUE :
+ *      None
+ *
+ */
+
+void grlib_init()
+{
+    if ( !syslib ) syslib = grlib_create() ;
+}
+
+/* --------------------------------------------------------------------------- */
diff --git a/modules/libgrbase/g_grlib.h b/modules/libgrbase/g_grlib.h
new file mode 100644
index 0000000..09c6e32
--- /dev/null
+++ b/modules/libgrbase/g_grlib.h
@@ -0,0 +1,52 @@
+/*
+ *  Copyright © 2006-2013 SplinterGU (Fenix/Bennugd)
+ *  Copyright © 2002-2006 Fenix Team (Fenix)
+ *  Copyright © 1999-2002 José Luis Cebrián Pagüe (Fenix)
+ *
+ *  This file is part of Bennu - Game Development
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty. In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *     1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *
+ *     2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *
+ *     3. This notice may not be removed or altered from any source
+ *     distribution.
+ *
+ */
+
+#ifndef __GRLIB_H
+#define __GRLIB_H
+
+#define MAXLIBS 1024
+
+typedef struct _grlib
+{
+    GRAPH ** maps ;
+    int map_reserved ;
+    char name[ 64 ];
+}
+GRLIB ;
+
+extern GRLIB * syslib ;
+
+extern GRAPH * bitmap_get( int libid, int mapcode ) ;
+extern GRLIB * grlib_get( int libid ) ;
+extern void grlib_init() ;
+extern int grlib_new() ;
+extern void grlib_destroy( int libid ) ;
+extern int grlib_add_map( int libid, GRAPH * map ) ;
+extern int grlib_unload_map( int libid, int mapcode ) ;
+
+#endif
diff --git a/modules/libgrbase/g_pal.c b/modules/libgrbase/g_pal.c
new file mode 100644
index 0000000..26e56a5
--- /dev/null
+++ b/modules/libgrbase/g_pal.c
@@ -0,0 +1,832 @@
+/*
+ *  Copyright © 2006-2016 SplinterGU (Fenix/Bennugd)
+ *  Copyright © 2002-2006 Fenix Team (Fenix)
+ *  Copyright © 1999-2002 José Luis Cebrián Pagüe (Fenix)
+ *
+ *  This file is part of Bennu - Game Development
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty. In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *     1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *
+ *     2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *
+ *     3. This notice may not be removed or altered from any source
+ *     distribution.
+ *
+ */
+
+/* --------------------------------------------------------------------------- */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "libgrbase.h"
+
+/* --------------------------------------------------------------------------- */
+
+PALETTE * first_palette = NULL ;
+
+int palette_changed = 0 ;
+
+/* Tabla de transparencias */
+
+uint8_t trans_table[ 256 ][ 256 ] ;
+int trans_table_updated = 0 ;
+
+uint16_t colorghost[65536] ;           /* Deja un color a 50% de intensidad */
+
+/* Paleta de colores por defecto */
+
+uint8_t default_palette[] =
+{
+    0, 0, 0,            /* Color   0 */
+    16, 16, 16,         /* Color   1 */
+    32, 32, 32,         /* Color   2 */
+    48, 48, 48,         /* Color   3 */
+    64, 64, 64,         /* Color   4 */
+    84, 84, 84,         /* Color   5 */
+    100, 100, 100,      /* Color   6 */
+    116, 116, 116,      /* Color   7 */
+    132, 132, 132,      /* Color   8 */
+    148, 148, 148,      /* Color   9 */
+    168, 168, 168,      /* Color  10 */
+    184, 184, 184,      /* Color  11 */
+    200, 200, 200,      /* Color  12 */
+    216, 216, 216,      /* Color  13 */
+    232, 232, 232,      /* Color  14 */
+    252, 252, 252,      /* Color  15 */
+    40, 0, 0,           /* Color  16 */
+    72, 0, 0,           /* Color  17 */
+    108, 0, 0,          /* Color  18 */
+    144, 0, 0,          /* Color  19 */
+    180, 0, 0,          /* Color  20 */
+    216, 0, 0,          /* Color  21 */
+    252, 0, 0,          /* Color  22 */
+    252, 32, 0,         /* Color  23 */
+    252, 64, 0,         /* Color  24 */
+    252, 96, 0,         /* Color  25 */
+    252, 128, 0,        /* Color  26 */
+    252, 160, 0,        /* Color  27 */
+    252, 180, 56,       /* Color  28 */
+    252, 200, 112,      /* Color  29 */
+    252, 220, 168,      /* Color  30 */
+    252, 240, 224,      /* Color  31 */
+    0, 40, 0,           /* Color  32 */
+    0, 60, 0,           /* Color  33 */
+    0, 84, 0,           /* Color  34 */
+    0, 108, 0,          /* Color  35 */
+    0, 132, 0,          /* Color  36 */
+    0, 156, 0,          /* Color  37 */
+    0, 180, 0,          /* Color  38 */
+    0, 204, 0,          /* Color  39 */
+    0, 228, 0,          /* Color  40 */
+    0, 252, 0,          /* Color  41 */
+    48, 252, 32,        /* Color  42 */
+    96, 252, 64,        /* Color  43 */
+    144, 252, 96,       /* Color  44 */
+    192, 252, 132,      /* Color  45 */
+    216, 252, 176,      /* Color  46 */
+    240, 252, 220,      /* Color  47 */
+    0, 0, 40,           /* Color  48 */
+    0, 0, 72,           /* Color  49 */
+    0, 0, 104,          /* Color  50 */
+    0, 0, 140,          /* Color  51 */
+    0, 0, 172,          /* Color  52 */
+    0, 0, 208,          /* Color  53 */
+    0, 0, 252,          /* Color  54 */
+    0, 48, 252,         /* Color  55 */
+    0, 100, 252,        /* Color  56 */
+    0, 148, 252,        /* Color  57 */
+    0, 200, 252,        /* Color  58 */
+    0, 252, 252,        /* Color  59 */
+    56, 252, 252,       /* Color  60 */
+    112, 252, 252,      /* Color  61 */
+    168, 252, 252,      /* Color  62 */
+    224, 252, 252,      /* Color  63 */
+    28, 28, 0,          /* Color  64 */
+    52, 52, 0,          /* Color  65 */
+    76, 76, 0,          /* Color  66 */
+    100, 100, 0,        /* Color  67 */
+    124, 124, 0,        /* Color  68 */
+    152, 152, 0,        /* Color  69 */
+    176, 176, 0,        /* Color  70 */
+    200, 200, 0,        /* Color  71 */
+    224, 224, 0,        /* Color  72 */
+    252, 252, 0,        /* Color  73 */
+    252, 252, 36,       /* Color  74 */
+    252, 252, 72,       /* Color  75 */
+    252, 252, 108,      /* Color  76 */
+    252, 252, 144,      /* Color  77 */
+    252, 252, 180,      /* Color  78 */
+    252, 252, 220,      /* Color  79 */
+    28, 0, 28,          /* Color  80 */
+    52, 0, 52,          /* Color  81 */
+    76, 0, 76,          /* Color  82 */
+    100, 0, 100,        /* Color  83 */
+    124, 0, 124,        /* Color  84 */
+    152, 0, 152,        /* Color  85 */
+    176, 0, 176,        /* Color  86 */
+    200, 0, 200,        /* Color  87 */
+    224, 0, 224,        /* Color  88 */
+    252, 0, 252,        /* Color  89 */
+    252, 36, 252,       /* Color  90 */
+    252, 72, 252,       /* Color  91 */
+    252, 112, 252,      /* Color  92 */
+    252, 148, 252,      /* Color  93 */
+    252, 184, 252,      /* Color  94 */
+    252, 224, 252,      /* Color  95 */
+    0, 20, 20,          /* Color  96 */
+    0, 40, 40,          /* Color  97 */
+    0, 60, 60,          /* Color  98 */
+    0, 80, 80,          /* Color  99 */
+    0, 104, 100,        /* Color 100 */
+    0, 124, 120,        /* Color 101 */
+    0, 144, 144,        /* Color 102 */
+    0, 164, 164,        /* Color 103 */
+    0, 188, 184,        /* Color 104 */
+    0, 208, 204,        /* Color 105 */
+    0, 228, 224,        /* Color 106 */
+    0, 252, 248,        /* Color 107 */
+    44, 252, 248,       /* Color 108 */
+    92, 252, 248,       /* Color 109 */
+    140, 252, 248,      /* Color 110 */
+    188, 252, 248,      /* Color 111 */
+    24, 12, 0,          /* Color 112 */
+    44, 24, 0,          /* Color 113 */
+    64, 36, 0,          /* Color 114 */
+    84, 48, 0,          /* Color 115 */
+    108, 60, 0,         /* Color 116 */
+    128, 72, 0,         /* Color 117 */
+    148, 84, 0,         /* Color 118 */
+    168, 96, 0,         /* Color 119 */
+    192, 112, 0,        /* Color 120 */
+    196, 128, 28,       /* Color 121 */
+    204, 144, 60,       /* Color 122 */
+    212, 160, 92,       /* Color 123 */
+    216, 180, 120,      /* Color 124 */
+    224, 196, 152,      /* Color 125 */
+    232, 212, 184,      /* Color 126 */
+    240, 232, 216,      /* Color 127 */
+    24, 12, 12,         /* Color 128 */
+    40, 20, 20,         /* Color 129 */
+    60, 32, 32,         /* Color 130 */
+    80, 44, 44,         /* Color 131 */
+    96, 52, 52,         /* Color 132 */
+    116, 64, 64,        /* Color 133 */
+    136, 76, 76,        /* Color 134 */
+    156, 88, 88,        /* Color 135 */
+    176, 104, 104,      /* Color 136 */
+    196, 120, 120,      /* Color 137 */
+    216, 136, 136,      /* Color 138 */
+    240, 152, 152,      /* Color 139 */
+    240, 168, 168,      /* Color 140 */
+    244, 188, 188,      /* Color 141 */
+    244, 204, 204,      /* Color 142 */
+    248, 224, 224,      /* Color 143 */
+    24, 20, 12,         /* Color 144 */
+    44, 36, 24,         /* Color 145 */
+    68, 52, 36,         /* Color 146 */
+    88, 72, 48,         /* Color 147 */
+    112, 88, 60,        /* Color 148 */
+    132, 104, 72,       /* Color 149 */
+    156, 124, 88,       /* Color 150 */
+    172, 140, 100,      /* Color 151 */
+    188, 156, 112,      /* Color 152 */
+    204, 176, 124,      /* Color 153 */
+    220, 192, 136,      /* Color 154 */
+    240, 212, 152,      /* Color 155 */
+    240, 216, 168,      /* Color 156 */
+    244, 224, 188,      /* Color 157 */
+    244, 232, 204,      /* Color 158 */
+    248, 240, 224,      /* Color 159 */
+    32, 8, 0,           /* Color 160 */
+    60, 16, 0,          /* Color 161 */
+    88, 28, 0,          /* Color 162 */
+    120, 36, 0,         /* Color 163 */
+    148, 48, 0,         /* Color 164 */
+    176, 56, 0,         /* Color 165 */
+    208, 68, 0,         /* Color 166 */
+    216, 88, 0,         /* Color 167 */
+    224, 112, 0,        /* Color 168 */
+    232, 136, 0,        /* Color 169 */
+    240, 160, 0,        /* Color 170 */
+    252, 184, 0,        /* Color 171 */
+    252, 200, 56,       /* Color 172 */
+    252, 216, 112,      /* Color 173 */
+    252, 232, 168,      /* Color 174 */
+    252, 252, 224,      /* Color 175 */
+    20, 12, 12,         /* Color 176 */
+    36, 24, 24,         /* Color 177 */
+    56, 36, 36,         /* Color 178 */
+    72, 48, 48,         /* Color 179 */
+    92, 64, 64,         /* Color 180 */
+    108, 76, 76,        /* Color 181 */
+    128, 88, 88,        /* Color 182 */
+    144, 100, 100,      /* Color 183 */
+    164, 116, 116,      /* Color 184 */
+    172, 132, 132,      /* Color 185 */
+    184, 148, 148,      /* Color 186 */
+    192, 164, 164,      /* Color 187 */
+    204, 180, 180,      /* Color 188 */
+    212, 196, 196,      /* Color 189 */
+    224, 212, 212,      /* Color 190 */
+    236, 232, 232,      /* Color 191 */
+    12, 20, 12,         /* Color 192 */
+    24, 36, 24,         /* Color 193 */
+    36, 56, 36,         /* Color 194 */
+    48, 72, 48,         /* Color 195 */
+    64, 92, 64,         /* Color 196 */
+    76, 108, 76,        /* Color 197 */
+    88, 128, 88,        /* Color 198 */
+    100, 144, 100,      /* Color 199 */
+    116, 164, 116,      /* Color 200 */
+    132, 172, 132,      /* Color 201 */
+    148, 184, 148,      /* Color 202 */
+    164, 192, 164,      /* Color 203 */
+    180, 204, 180,      /* Color 204 */
+    196, 212, 196,      /* Color 205 */
+    212, 224, 212,      /* Color 206 */
+    232, 236, 232,      /* Color 207 */
+    12, 12, 16,         /* Color 208 */
+    24, 24, 32,         /* Color 209 */
+    36, 36, 48,         /* Color 210 */
+    48, 48, 64,         /* Color 211 */
+    64, 64, 80,         /* Color 212 */
+    76, 76, 96,         /* Color 213 */
+    88, 88, 112,        /* Color 214 */
+    100, 100, 128,      /* Color 215 */
+    116, 116, 148,      /* Color 216 */
+    132, 132, 160,      /* Color 217 */
+    148, 148, 172,      /* Color 218 */
+    164, 164, 184,      /* Color 219 */
+    180, 180, 196,      /* Color 220 */
+    196, 196, 208,      /* Color 221 */
+    212, 212, 220,      /* Color 222 */
+    232, 232, 236,      /* Color 223 */
+    40, 0, 0,           /* Color 224 */
+    80, 0, 0,           /* Color 225 */
+    124, 0, 0,          /* Color 226 */
+    164, 0, 0,          /* Color 227 */
+    208, 0, 0,          /* Color 228 */
+    252, 0, 0,          /* Color 229 */
+    252, 40, 0,         /* Color 230 */
+    252, 84, 0,         /* Color 231 */
+    252, 124, 0,        /* Color 232 */
+    252, 168, 0,        /* Color 233 */
+    252, 208, 0,        /* Color 234 */
+    252, 252, 0,        /* Color 235 */
+    252, 252, 44,       /* Color 236 */
+    252, 252, 92,       /* Color 237 */
+    252, 252, 140,      /* Color 238 */
+    252, 252, 188,      /* Color 239 */
+    0, 0, 0,            /* Color 240 */
+    0, 0, 88,           /* Color 241 */
+    0, 0, 128,          /* Color 242 */
+    0, 0, 168,          /* Color 243 */
+    0, 0, 208,          /* Color 244 */
+    0, 0, 248,          /* Color 245 */
+    40, 0, 248,         /* Color 246 */
+    84, 0, 248,         /* Color 247 */
+    124, 0, 248,        /* Color 248 */
+    168, 0, 248,        /* Color 249 */
+    208, 0, 248,        /* Color 250 */
+    252, 0, 252,        /* Color 251 */
+    252, 52, 252,       /* Color 252 */
+    252, 108, 252,      /* Color 253 */
+    252, 164, 252,      /* Color 254 */
+    252, 220, 252       /* Color 255 */
+} ;
+
+uint32_t default_colorequiv[256];
+
+/* --------------------------------------------------------------------------- */
+/*
+ * Match an RGB value to a particular palette index
+ */
+int find_nearest_color( PALETTE * pal, int first, int last, int r, int g, int b )
+{
+    /* Do colorspace distance matching */
+    unsigned int smallest = ~0;
+    unsigned int distance;
+    int rd, gd, bd;
+    int i;
+    int pixel = 0;
+    rgb_component * palrgb ;
+
+    if ( !pal )
+        if ( !sys_pixel_format->palette )
+            palrgb = ( rgb_component * ) default_palette;
+        else
+            palrgb = sys_pixel_format->palette->rgb ;
+    else
+        palrgb = pal->rgb ;
+
+    for ( i = first; i <= last; ++i )
+    {
+        rd = ( palrgb[i].r - ( r /*& ~0x02 */) ) ;
+        gd = ( palrgb[i].g - ( g /*& ~0x02 */) ) ;
+        bd = ( palrgb[i].b - ( b /*& ~0x02 */) ) ;
+
+        distance = ( rd * rd ) + ( gd * gd ) + ( bd * bd ) ;
+        if ( distance < smallest )
+        {
+            pixel = i;
+            if ( !distance ) break;  /* Perfect match! */
+            smallest = distance;
+        }
+    }
+
+    return( pixel );
+}
+
+/* --------------------------------------------------------------------------- */
+/* Find the opaque pixel value corresponding to an RGB triple */
+
+int _rgba( PIXEL_FORMAT * format, int r, int g, int b, int a )
+{
+    int color;
+
+    if ( format->depth < 16 ) return find_nearest_color( format->palette, 0, 255, r, g, b );
+
+    color = (( r >> format->Rloss ) << format->Rshift ) |
+            (( g >> format->Gloss ) << format->Gshift ) |
+            (( b >> format->Bloss ) << format->Bshift ) ;
+
+    if ( format->depth == 32 ) color |= (( a >> format->Aloss ) << format->Ashift );
+
+    return color;
+}
+
+/* --------------------------------------------------------------------------- */
+/* Find the pixel value corresponding to an RGBA quadruple */
+
+int _rgb( PIXEL_FORMAT * format, int r, int g, int b )
+{
+    return _rgba( format, r, g, b, 255 );
+}
+
+/* --------------------------------------------------------------------------- */
+
+void _get_rgba( PIXEL_FORMAT * format, int color, int *r, int *g, int *b, int *a )
+{
+    /* 8 bits mode, work with system palette */
+
+    if ( format->depth < 16 )
+    {
+        rgb_component * rgb ;
+
+        if ( !format->palette ) rgb = ( rgb_component * ) default_palette;
+        else                    rgb = format->palette->rgb ;
+
+        color &= 0xFF ;
+        ( *r ) = rgb[ color ].r ;
+        ( *g ) = rgb[ color ].g ;
+        ( *b ) = rgb[ color ].b ;
+
+        return ;
+    }
+
+    ( *r ) = (( color & format->Rmask ) >> format->Rshift ) << format->Rloss ;
+    ( *g ) = (( color & format->Gmask ) >> format->Gshift ) << format->Gloss ;
+    ( *b ) = (( color & format->Bmask ) >> format->Bshift ) << format->Bloss ;
+
+    if ( a && format->depth == 32 ) ( *a ) = (( color & format->Amask ) >> format->Ashift ) << format->Aloss ;
+}
+
+/* --------------------------------------------------------------------------- */
+
+void _get_rgb( PIXEL_FORMAT * format, int color, int *r, int *g, int *b )
+{
+    return _get_rgba( format, color, r, g, b, NULL );
+}
+
+/* --------------------------------------------------------------------------- */
+
+void pal_refresh( PALETTE * pal )
+{
+    if ( sys_pixel_format->depth > 8 )
+    {
+        int n;
+
+        if ( !pal )
+        {
+            uint8_t * p = default_palette;
+            for ( n = 0; n < 256; n++ )
+            {
+                default_colorequiv[ n ] = _rgb( sys_pixel_format, *( p ), *( p + 1 ), *( p + 2 ) );
+                p += 3;
+            }
+
+            pal = first_palette;
+            while ( pal )
+            {
+                for ( n = 256; n--; ) pal->colorequiv[ n ] = _rgb( sys_pixel_format, pal->rgb[ n ].r, pal->rgb[ n ].g, pal->rgb[ n ].b );
+                pal = pal->next;
+            }
+        }
+        else
+        {
+            for ( n = 256; n--; ) pal->colorequiv[ n ] = _rgb( sys_pixel_format, pal->rgb[ n ].r, pal->rgb[ n ].g, pal->rgb[ n ].b );
+        }
+    }
+    else
+        if ( !pal || pal == sys_pixel_format->palette ) palette_changed = 1 ;
+
+}
+
+/* --------------------------------------------------------------------------- */
+
+void pal_use( PALETTE * pal )
+{
+    if ( pal ) pal->use++;
+}
+
+/* --------------------------------------------------------------------------- */
+
+int pal_discard( PALETTE * pal )
+{
+    if ( !pal ) return 0;
+    if ( pal->use > 0 ) pal->use--;
+    return pal->use;
+}
+
+/* --------------------------------------------------------------------------- */
+
+PALETTE * pal_new( PALETTE * basepal )
+{
+    PALETTE * pal = calloc( 1, sizeof( PALETTE ) );
+    if ( !pal ) return NULL ;
+
+    if ( basepal )
+    {
+        memmove( pal->rgb, basepal->rgb, sizeof( pal->rgb ) ) ;
+        memmove( pal->colorequiv, basepal->colorequiv, sizeof( pal->colorequiv ) ) ;
+        pal_refresh( pal );
+    }
+    else
+    {
+        /* Default */
+        if ( sys_pixel_format->palette )
+            memmove( pal->rgb, sys_pixel_format->palette->rgb, sizeof( pal->rgb ) ) ;
+        else
+            memmove( pal->rgb, default_palette, sizeof( pal->rgb ) ) ;
+
+        pal_refresh( pal );
+    }
+
+    pal->use = 1 ;
+    pal->next = first_palette ;
+    pal->prev = NULL ;
+    if ( first_palette ) first_palette->prev = pal;
+    first_palette = pal ;
+
+    return pal;
+}
+
+/* --------------------------------------------------------------------------- */
+
+PALETTE * pal_new_rgb( unsigned char * datapal )
+{
+    if ( !datapal ) return NULL ;
+
+    PALETTE * pal = malloc( sizeof( PALETTE ) );
+    if ( !pal ) return NULL ;
+
+    memmove( pal->rgb, datapal, sizeof( pal->rgb ) );
+    pal_refresh( pal );
+
+    pal->use = 1 ;
+    pal->next = first_palette ;
+    pal->prev = NULL ;
+    if ( first_palette ) first_palette->prev = pal;
+    first_palette = pal ;
+
+    return pal;
+}
+
+/* --------------------------------------------------------------------------- */
+
+void pal_destroy( PALETTE * pal )
+{
+    if ( !pal ) return ;
+
+    if ( pal_discard( pal ) > 0 ) return ;
+
+    if ( pal->next ) pal->next->prev = pal->prev ;
+    if ( pal->prev ) pal->prev->next = pal->next ;
+
+    if ( pal == first_palette ) first_palette = pal->next ;
+
+    free( pal );
+}
+
+/* --------------------------------------------------------------------------- */
+
+int pal_get( PALETTE * spal, int color, int num, uint8_t * pal )
+{
+    if ( num < 1 || color < 0 || color > 255 ) return 0;
+    if ( color + num > 256 ) num = 256 - color ;
+
+    if ( !spal )
+    {
+        if ( !sys_pixel_format->palette ) sys_pixel_format->palette = pal_new( NULL );
+        spal = sys_pixel_format->palette ;
+    }
+
+    while ( num-- )
+    {
+        *pal++ = spal->rgb[ color ].r ;
+        *pal++ = spal->rgb[ color ].g ;
+        *pal++ = spal->rgb[ color++ ].b ;
+    }
+    return 1;
+}
+
+/* --------------------------------------------------------------------------- */
+
+int pal_set( PALETTE * spal, int color, int num, uint8_t * pal )
+{
+    if ( num < 1 || color < 0 || color > 255 ) return 0;
+    if ( color + num > 256 ) num = 256 - color ;
+
+    if ( !spal )
+    {
+        if ( !sys_pixel_format->palette ) sys_pixel_format->palette = pal_new( NULL );
+        spal = sys_pixel_format->palette ;
+    }
+
+    while ( num-- )
+    {
+        spal->rgb[ color ].r = *pal++ ;
+        spal->rgb[ color ].g = *pal++ ;
+        spal->rgb[ color++ ].b = *pal++ ;
+    }
+    return 1;
+}
+
+/* --------------------------------------------------------------------------- */
+
+int pal_map_assign( int libid, int mapcode, PALETTE * palid )
+{
+    GRAPH * bmp = bitmap_get( libid, mapcode ) ;
+    PALETTE * oldpal ;
+
+    if ( !bmp /*|| !palid*/ || bmp->format->depth != 8 ) return 0 ;
+
+    oldpal = bmp->format->palette ;
+    bmp->format->palette = palid ;
+
+    pal_use( bmp->format->palette ) ;
+
+    if ( oldpal ) pal_destroy( oldpal ) ;
+
+    bmp->modified = 1;
+
+    return 1 ;
+}
+
+/* --------------------------------------------------------------------------- */
+
+int pal_map_remove( int libid, int mapcode )
+{
+    GRAPH * bmp = bitmap_get( libid, mapcode ) ;
+
+    if ( !bmp || bmp->format->depth != 8 ) return 0 ;
+
+    if ( bmp->format->palette ) pal_destroy( bmp->format->palette ) ;
+
+    bmp->format->palette = NULL ;
+    bmp->modified = 1;
+
+    return 1 ;
+}
+
+/* --------------------------------------------------------------------------- */
+
+void gr_roll_palette( int color0, int num, int inc )
+{
+    rgb_component backup[ 256 ] ;
+
+    if ( color0 < 0 || color0 > 255 ) return ;
+    if ( num + color0 > 255 ) num = 256 - color0 ;
+
+    while ( inc >= num ) inc -= num ;
+    while ( inc <= -num ) inc += num ;
+
+    if ( !inc ) return ;
+
+    memcpy( &backup[ color0 ], &sys_pixel_format->palette->rgb[ color0 ], sizeof( rgb_component ) * num ) ;
+
+    if ( inc < 0 )  /* Derecha */
+    {
+        inc = -inc ;
+        memmove( &sys_pixel_format->palette->rgb[ color0 + inc ], &sys_pixel_format->palette->rgb[ color0 ], sizeof( rgb_component ) * ( num - inc ) ) ;
+        memcpy( &sys_pixel_format->palette->rgb[ color0 ], &backup[ color0 + num - inc ], sizeof( rgb_component ) * inc ) ;
+    }
+    else /* Izquierda */
+    {
+        memmove( &sys_pixel_format->palette->rgb[ color0 ], &sys_pixel_format->palette->rgb[ color0 + inc ], sizeof( rgb_component ) * ( num - inc ) ) ;
+        memcpy( &sys_pixel_format->palette->rgb[ color0 + num - inc ], &backup[ color0 ], sizeof( rgb_component ) * inc ) ;
+    }
+
+    palette_changed = 1 ;
+}
+
+/* --------------------------------------------------------------------------- */
+
+int gr_rgb( int r, int g, int b )
+{
+    int color ;
+    color = _rgb( sys_pixel_format, r, g, b );
+    if ( sys_pixel_format->depth == 16 && !color ) return 1;
+    return color ;
+}
+
+/* --------------------------------------------------------------------------- */
+
+int gr_rgba( int r, int g, int b, int a )
+{
+    int color ;
+    color = _rgba( sys_pixel_format, r, g, b, a );
+    if ( sys_pixel_format->depth == 16 && !color ) return 1;
+    return color ;
+}
+
+/* --------------------------------------------------------------------------- */
+
+void gr_get_rgb( int color, int *r, int *g, int *b )
+{
+    return _get_rgb( sys_pixel_format, color, r, g, b );
+}
+
+/* --------------------------------------------------------------------------- */
+
+void gr_get_rgba( int color, int *r, int *g, int *b, int *a )
+{
+    return _get_rgba( sys_pixel_format, color, r, g, b, a );
+}
+
+/* --------------------------------------------------------------------------- */
+/* This functions is used only for 16 and 32 bits                              */
+
+int gr_rgb_depth( int depth, int r, int g, int b )
+{
+    int color ;
+    PIXEL_FORMAT * pf = bitmap_create_format( depth );
+    color = _rgb( pf, r, g, b );
+    free( pf );
+    if ( !color && depth == 16 ) return 1 ;
+    return color ;
+}
+
+/* --------------------------------------------------------------------------- */
+/* This functions is used only for 16 and 32 bits                              */
+
+int gr_rgba_depth( int depth, int r, int g, int b, int a )
+{
+    int color ;
+    PIXEL_FORMAT * pf = bitmap_create_format( depth );
+    color = _rgba( pf, r, g, b, a );
+    free( pf );
+    if ( !color && depth == 16 ) return 1 ;
+    return color ;
+}
+
+/* --------------------------------------------------------------------------- */
+
+void gr_get_rgb_depth( int depth, int color, int *r, int *g, int *b )
+{
+    PIXEL_FORMAT * pf = bitmap_create_format( depth );
+    _get_rgb( pf, color, r, g, b );
+    free( pf );
+}
+
+/* --------------------------------------------------------------------------- */
+
+void gr_get_rgba_depth( int depth, int color, int *r, int *g, int *b, int *a )
+{
+    PIXEL_FORMAT * pf = bitmap_create_format( depth );
+    _get_rgba( pf, color, r, g, b, a );
+    free( pf );
+}
+
+/* --------------------------------------------------------------------------- */
+
+int gr_find_nearest_color( int r, int g, int b )
+{
+    return find_nearest_color( sys_pixel_format->palette, 0, 255, r, g, b ) ;
+}
+
+/* --------------------------------------------------------------------------- */
+
+void gr_make_trans_table()
+{
+    int a = 0, b = 0;
+    int r1, g1, b1;
+    rgb_component * rgb;
+
+    if ( trans_table_updated ) return ;
+
+    if ( sys_pixel_format->palette )
+        rgb = sys_pixel_format->palette->rgb;
+    else
+        rgb = ( rgb_component * ) default_palette;
+
+    for ( a = 0; a < 256; a++ )
+    {
+        r1 = rgb[ a ].r / 2 ;
+        g1 = rgb[ a ].g / 2 ;
+        b1 = rgb[ a ].b / 2 ;
+
+        for ( b = 0; b < a; b++ )
+            trans_table[ a ][ b ] =
+                trans_table[ b ][ a ] =
+                    find_nearest_color( NULL, b, a, r1 + rgb[ b ].r / 2, g1 + rgb[ b ].g / 2, b1 + rgb[ b ].b / 2 ) ;
+
+        trans_table[ a ][ a ] = a ;
+        trans_table[ 0 ][ a ] = a ;
+    }
+
+    trans_table_updated = 1 ;
+}
+
+/* --------------------------------------------------------------------------- */
+
+void gr_set_rgb( int color, int r, int g, int b )
+{
+    if ( color < 0 || color > 255 ) return ;
+
+    if ( !sys_pixel_format->palette )
+    {
+        sys_pixel_format->palette = pal_new( NULL );
+        memset ( sys_pixel_format->palette->rgb, '\0', sizeof( sys_pixel_format->palette->rgb ) );
+    }
+
+    sys_pixel_format->palette->rgb[ color ].r = r << 2;
+    sys_pixel_format->palette->rgb[ color ].g = g << 2;
+    sys_pixel_format->palette->rgb[ color ].b = b << 2;
+
+    palette_changed = 1 ;
+}
+
+/* --------------------------------------------------------------------------- */
+
+/* Rutinas para guardar y recibir trozos de paleta desde/hacia un buffer */
+
+void gr_get_colors( int color, int num, uint8_t * pal )
+{
+    rgb_component * rgb;
+
+    if ( num < 1 || color < 0 || color > 255 ) return ;
+    if ( color + num > 256 ) num = 256 - color ;
+
+    if ( !sys_pixel_format->palette )
+        rgb = ( rgb_component * ) default_palette;
+    else
+        rgb = ( rgb_component * ) sys_pixel_format->palette->rgb;
+
+    while ( num-- )
+    {
+        *pal++ = rgb[ color ].r ;
+        *pal++ = rgb[ color ].g ;
+        *pal++ = rgb[ color++ ].b ;
+    }
+}
+
+/* --------------------------------------------------------------------------- */
+
+void gr_set_colors( int color, int num, uint8_t * pal )
+{
+    if ( num < 1 || color < 0 || color > 255 ) return ;
+    if ( color + num > 256 ) num = 256 - color ;
+
+    if ( !sys_pixel_format->palette )
+    {
+        sys_pixel_format->palette = pal_new( NULL );
+        memset ( sys_pixel_format->palette->rgb, '\0', sizeof( sys_pixel_format->palette->rgb ) );
+    }
+
+    while ( num-- )
+    {
+        sys_pixel_format->palette->rgb[ color ].r = *pal++ ;
+        sys_pixel_format->palette->rgb[ color ].g = *pal++ ;
+        sys_pixel_format->palette->rgb[ color++ ].b = *pal++ ;
+    }
+
+    palette_changed = 1 ;
+}
+
+/* --------------------------------------------------------------------------- */
+
diff --git a/modules/libgrbase/g_pal.h b/modules/libgrbase/g_pal.h
new file mode 100644
index 0000000..1895438
--- /dev/null
+++ b/modules/libgrbase/g_pal.h
@@ -0,0 +1,133 @@
+/*
+ *  Copyright © 2006-2013 SplinterGU (Fenix/Bennugd)
+ *  Copyright © 2002-2006 Fenix Team (Fenix)
+ *  Copyright © 1999-2002 José Luis Cebrián Pagüe (Fenix)
+ *
+ *  This file is part of Bennu - Game Development
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty. In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *     1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *
+ *     2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *
+ *     3. This notice may not be removed or altered from any source
+ *     distribution.
+ *
+ */
+
+#ifndef __PAL_H
+#define __PAL_H
+
+/* --------------------------------------------------------------------------- */
+#ifdef _MSC_VER
+#pragma pack(push, 1)
+#endif
+
+typedef struct _rgb_component
+{
+    uint8_t     r ;
+    uint8_t     g ;
+    uint8_t     b ;
+}
+#ifdef __GNUC__
+__attribute__ ((packed))
+#endif
+rgb_component ;
+
+typedef struct _palette
+{
+    rgb_component       rgb[256] ;
+
+    uint32_t            colorequiv[256] ;
+
+    int                 use;
+
+    struct _palette     * next ;
+    struct _palette     * prev ;
+}
+#ifdef __GNUC__
+__attribute__ ((packed))
+#endif
+PALETTE ;
+
+#ifdef _MSC_VER
+#pragma pack(pop)
+#endif
+
+/* --------------------------------------------------------------------------- */
+
+#include "g_bitmap.h"
+
+/* --------------------------------------------------------------------------- */
+
+/* Paleta de colores */
+/* ----------------- */
+
+extern PALETTE * first_palette ;
+
+extern int palette_changed ;
+
+/* Lista ordenada de colores */
+
+extern int color_list[ 256 ] ;
+
+/* Tabla de transparencias */
+
+extern uint8_t trans_table[ 256 ][ 256 ] ;
+extern int trans_table_updated ;
+
+/* Deja un color a 50% de intensidad */
+
+extern uint16_t colorghost[65536] ;
+
+/* Paleta de colores por defecto */
+
+extern uint8_t default_palette[];
+extern uint32_t default_colorequiv[256];
+
+/* --------------------------------------------------------------------------- */
+
+extern int find_nearest_color( PALETTE * pal, int first, int last, int r, int g, int b );
+extern int _rgb( PIXEL_FORMAT * format, int r, int g, int b );
+extern int _rgba( PIXEL_FORMAT * format, int r, int g, int b, int a );
+void _get_rgb( PIXEL_FORMAT * format, int color, int *r, int *g, int *b );
+void _get_rgba( PIXEL_FORMAT * format, int color, int *r, int *g, int *b, int *a );
+extern void pal_refresh( PALETTE * pal );
+extern void pal_use( PALETTE * pal );
+extern int pal_discard( PALETTE * pal );
+extern PALETTE * pal_new( PALETTE * basepal );
+extern PALETTE * pal_new_rgb( unsigned char * datapal );
+extern void pal_destroy( PALETTE * pal );
+extern int pal_get( PALETTE * spal, int color, int num, uint8_t * pal );
+extern int pal_set( PALETTE * spal, int color, int num, uint8_t * pal );
+extern int pal_map_assign( int libid, int mapcode, PALETTE * palid );
+extern int pal_map_remove( int libid, int mapcode );
+extern void gr_roll_palette( int color0, int num, int inc );
+extern int gr_rgb( int r, int g, int b );
+extern int gr_rgba( int r, int g, int b, int a );
+extern void gr_get_rgb( int color, int *r, int *g, int *b );
+extern void gr_get_rgba( int color, int *r, int *g, int *b, int *a );
+extern int gr_rgb_depth( int depth, int r, int g, int b );
+extern int gr_rgba_depth( int depth, int r, int g, int b, int a );
+extern void gr_get_rgb_depth( int depth, int color, int *r, int *g, int *b );
+extern void gr_get_rgba_depth( int depth, int color, int *r, int *g, int *b, int *a );
+extern int gr_find_nearest_color( int r, int g, int b );
+extern void gr_make_trans_table();
+extern void gr_set_rgb( int color, int r, int g, int b );
+extern void gr_get_colors( int color, int num, uint8_t * pal );
+extern void gr_set_colors( int color, int num, uint8_t * pal );
+
+/* --------------------------------------------------------------------------- */
+
+#endif
diff --git a/modules/libgrbase/g_region.h b/modules/libgrbase/g_region.h
new file mode 100644
index 0000000..519d314
--- /dev/null
+++ b/modules/libgrbase/g_region.h
@@ -0,0 +1,43 @@
+/*
+ *  Copyright © 2006-2013 SplinterGU (Fenix/Bennugd)
+ *  Copyright © 2002-2006 Fenix Team (Fenix)
+ *  Copyright © 1999-2002 José Luis Cebrián Pagüe (Fenix)
+ *
+ *  This file is part of Bennu - Game Development
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty. In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *     1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *
+ *     2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *
+ *     3. This notice may not be removed or altered from any source
+ *     distribution.
+ *
+ */
+
+#ifndef __REGION_H
+#define __REGION_H
+
+/* --------------------------------------------------------------------------- */
+
+typedef struct _clipregion
+{
+    int x ;
+    int y ;
+    int x2 ;    /* Inclusive */
+    int y2 ;
+}
+REGION ;
+
+#endif
diff --git a/modules/libgrbase/libgrbase.c b/modules/libgrbase/libgrbase.c
new file mode 100644
index 0000000..49deb95
--- /dev/null
+++ b/modules/libgrbase/libgrbase.c
@@ -0,0 +1,65 @@
+/*
+ *  Copyright © 2006-2016 SplinterGU (Fenix/Bennugd)
+ *  Copyright © 2002-2006 Fenix Team (Fenix)
+ *  Copyright © 1999-2002 José Luis Cebrián Pagüe (Fenix)
+ *
+ *  This file is part of Bennu - Game Development
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty. In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *     1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *
+ *     2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *
+ *     3. This notice may not be removed or altered from any source
+ *     distribution.
+ *
+ */
+
+/* --------------------------------------------------------------------------- */
+
+#include "bgddl.h"
+
+#include "libgrbase.h"
+
+/* --------------------------------------------------------------------------- */
+
+PIXEL_FORMAT * std_pixel_format8  = NULL;
+PIXEL_FORMAT * std_pixel_format16 = NULL;
+PIXEL_FORMAT * std_pixel_format32 = NULL;
+
+PIXEL_FORMAT * sys_pixel_format = NULL;
+
+GRAPH * background = NULL ;
+GRAPH * scrbitmap = NULL ;
+
+
+/* --------------------------------------------------------------------------- */
+/* Module initialization                                                       */
+
+void __bgdexport( libgrbase, module_initialize )()
+{
+    std_pixel_format8  = bitmap_create_format( 8 ) ;
+    std_pixel_format16 = bitmap_create_format( 16 ) ;
+    std_pixel_format32 = bitmap_create_format( 32 ) ;
+
+    grlib_init() ;
+}
+
+/* --------------------------------------------------------------------------- */
+/* exports                                                                     */
+/* --------------------------------------------------------------------------- */
+
+#include "libgrbase_exports.h"
+
+/* --------------------------------------------------------------------------- */
diff --git a/modules/libgrbase/libgrbase.h b/modules/libgrbase/libgrbase.h
new file mode 100644
index 0000000..44c46ca
--- /dev/null
+++ b/modules/libgrbase/libgrbase.h
@@ -0,0 +1,60 @@
+/*
+ *  Copyright © 2006-2013 SplinterGU (Fenix/Bennugd)
+ *  Copyright © 2002-2006 Fenix Team (Fenix)
+ *  Copyright © 1999-2002 José Luis Cebrián Pagüe (Fenix)
+ *
+ *  This file is part of Bennu - Game Development
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty. In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *     1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *
+ *     2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *
+ *     3. This notice may not be removed or altered from any source
+ *     distribution.
+ *
+ */
+
+#ifndef __LIBGRBASE_H
+#define __LIBGRBASE_H
+
+/* --------------------------------------------------------------------------- */
+
+#include <stdlib.h>
+#include <stdint.h>
+
+/* --------------------------------------------------------------------------- */
+
+#include "g_pal.h"
+#include "g_bitmap.h"
+#include "g_clear.h"
+#include "g_grlib.h"
+#include "g_region.h"
+#include "g_blendop.h"
+#include "g_conversion.h"
+
+/* --------------------------------------------------------------------------- */
+
+extern PIXEL_FORMAT * std_pixel_format8 ;
+extern PIXEL_FORMAT * std_pixel_format16 ;
+extern PIXEL_FORMAT * std_pixel_format32 ;
+
+extern PIXEL_FORMAT * sys_pixel_format ;
+
+extern GRAPH * background ;
+extern GRAPH * scrbitmap ;
+
+/* --------------------------------------------------------------------------- */
+
+#endif
diff --git a/modules/libgrbase/libgrbase_exports.h b/modules/libgrbase/libgrbase_exports.h
new file mode 100644
index 0000000..2cecad7
--- /dev/null
+++ b/modules/libgrbase/libgrbase_exports.h
@@ -0,0 +1,51 @@
+/*
+ *  Copyright © 2006-2013 SplinterGU (Fenix/Bennugd)
+ *  Copyright © 2002-2006 Fenix Team (Fenix)
+ *  Copyright © 1999-2002 José Luis Cebrián Pagüe (Fenix)
+ *
+ *  This file is part of Bennu - Game Development
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty. In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *     1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *
+ *     2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *
+ *     3. This notice may not be removed or altered from any source
+ *     distribution.
+ *
+ */
+
+#ifndef __LIBGRBASE_EXPORTS
+#define __LIBGRBASE_EXPORTS
+
+/* --------------------------------------------------------------------------- */
+
+#if defined(__BGDC__) || !defined(__STATIC__)
+
+/* --------------------------------------------------------------------------- */
+
+#include "bgddl.h"
+
+/* --------------------------------------------------------------------------- */
+/* Definicion de variables globales (usada en tiempo de compilacion)           */
+
+char * __bgdexport( libgrbase, globals_def ) =
+    "alpha_steps = 16;\n"
+    ;
+
+#endif
+
+/* --------------------------------------------------------------------------- */
+
+#endif
diff --git a/modules/libgrbase/resolution.h b/modules/libgrbase/resolution.h
new file mode 100644
index 0000000..4033058
--- /dev/null
+++ b/modules/libgrbase/resolution.h
@@ -0,0 +1,86 @@
+/*
+ *  Copyright © 2006-2013 SplinterGU (Fenix/Bennugd)
+ *  Copyright © 2002-2006 Fenix Team (Fenix)
+ *  Copyright © 1999-2002 José Luis Cebrián Pagüe (Fenix)
+ *
+ *  This file is part of Bennu - Game Development
+ *
+ *  This software is provided 'as-is', without any express or implied
+ *  warranty. In no event will the authors be held liable for any damages
+ *  arising from the use of this software.
+ *
+ *  Permission is granted to anyone to use this software for any purpose,
+ *  including commercial applications, and to alter it and redistribute it
+ *  freely, subject to the following restrictions:
+ *
+ *     1. The origin of this software must not be misrepresented; you must not
+ *     claim that you wrote the original software. If you use this software
+ *     in a product, an acknowledgment in the product documentation would be
+ *     appreciated but is not required.
+ *
+ *     2. Altered source versions must be plainly marked as such, and must not be
+ *     misrepresented as being the original software.
+ *
+ *     3. This notice may not be removed or altered from any source
+ *     distribution.
+ *
+ */
+
+#ifndef __RESOLUTION_H
+#define __RESOLUTION_H
+
+/* -------------------------------------------------------------------- */
+/* Librería gráfica                                                     */
+/* -------------------------------------------------------------------- */
+
+#define RESOLXY(m,r,x,y) \
+    {                                           \
+        int res = LOCINT32(m, r, RESOLUTION ) ; \
+        if ( res > 0 )                          \
+        {                                       \
+            if ( x < 0 )                        \
+                ( x ) = ( ( x ) - ( res - 1 )) / res ; \
+            else                                \
+                ( x ) /= res ;                  \
+                                                \
+            if ( y < 0 )                        \
+                ( y ) = ( ( y ) - ( res - 1 )) / res ; \
+            else                                \
+                ( y ) /= res ;                  \
+        }                                       \
+        else if ( res < 0 )                     \
+        {                                       \
+            ( x ) *= -res ;                     \
+            ( y ) *= -res ;                     \
+        }                                       \
+    }
+
+#define RESOLXYZ(m,r,x,y,z) \
+    {                                           \
+        int res = LOCINT32(m, r, RESOLUTION ) ; \
+        if ( res > 0 )                          \
+        {                                       \
+            if ( x < 0 )                        \
+                ( x ) = ( ( x ) - ( res - 1 )) / res ; \
+            else                                \
+                ( x ) /= res ;                  \
+                                                \
+            if ( y < 0 )                        \
+                ( y ) = ( ( y ) - ( res - 1 )) / res ; \
+            else                                \
+                ( y ) /= res ;                  \
+                                                \
+            if ( z < 0 )                        \
+                ( z ) = ( ( z ) - ( res - 1 )) / res ; \
+            else                                \
+                ( z ) /= res ;                  \
+        }                                       \
+        else if ( res < 0 )                     \
+        {                                       \
+            ( x ) *= -res ;                     \
+            ( y ) *= -res ;                     \
+            ( z ) *= -res ;                     \
+        }                                       \
+    }
+
+#endif