--- M6502/Screen.pm	2007/07/30 22:06:13	36
+++ M6502/Screen.pm	2007/07/31 21:43:57	73
@@ -11,8 +11,12 @@
 
 use Carp qw/confess/;
 
-use base qw(Class::Accessor);
-__PACKAGE__->mk_accessors(qw(debug scale show_mem mem_dump trace app));
+use base qw(Class::Accessor Prefs);
+__PACKAGE__->mk_accessors(qw(app));
+
+=head1 NAME
+
+Screen - simulated 256*256 pixels monochrome screen using SDL
 
 =head2 open_screen
 
@@ -25,6 +29,8 @@
 sub open_screen {
 	my $self = shift;
 
+	$self->prefs;
+
 	if ( ! $self->scale ) {
 		$self->scale( 1 );
 		warn "using default unscaled display\n";
@@ -98,18 +104,28 @@
 
 =cut
 
+my $_vram_counter;
+
 sub vram {
 	my ( $self, $offset, $byte ) = @_;
 	my $x = ( $offset % 32 ) << 3;
 	my $y = $offset >> 5;
 	my $mask = 1;
+	my $scale = $self->scale;
 
 	printf "## vram %04x %02x*%02x %02x\n", $offset, $x, $y, $byte if $self->trace;
 
 	foreach ( 0 .. 7 ) {
-		$self->p($x + $_, $y, $byte & $mask );
+		my $on = $byte & $mask;
+		if ( $scale == 1 ) {
+			$app->pixel( $x + $_, $y, $on ? $white : $black );
+		} else {
+			$self->p($x + $_, $y, $on );
+		}
 		$mask = $mask << 1;
 	}
+
+	$app->sync if ( $_vram_counter++ % 10 == 0 );
 }
 
 =head2 mmap_pixel
@@ -128,7 +144,7 @@
 	return unless $self->show_mem && $self->app;
 
 	my ( $x, $y ) = $self->mem_xy( $addr );
-	warn sprintf "## mem %04x %02x %02x %02d*%02d\n", $addr, $r, $g, $x, $y if $self->trace;
+	warn sprintf "## mem %04x %02x %02x %02d*%02d\n", $addr, $r, $g, $x, $y if $self->debug;
 
 	my $col = SDL::Color->new( -r => $r, -g => $g, -b => $b );
 	$self->app->pixel( $x, $y, $col );
@@ -150,4 +166,52 @@
 	$app->sync;
 }
 
+=head2 render
+
+  $self->render( @video_memory );
+
+=cut
+
+sub render {
+	my $self = shift;
+
+	die "this function isn't supported if scale isn't 1" unless $self->scale == 1;
+
+	$app->lock;
+
+	my ( $x, $y ) = ( 0,0 );
+
+	foreach my $b ( @_ ) {
+		foreach my $p ( split(//, unpack("B8",pack("C",$b)) ) ) {
+			$app->pixel( $x, $y, $p ? $white : $black );
+			$x++;
+		}
+		if ( $x == 256 ) {
+			$x = 0;
+			$y++;
+		}
+	}
+
+	$app->unlock;
+	$app->sync;
+
+	warn "Screen::render over\n";
+}
+
+=head1 SEE ALSO
+
+L<Orao> is sample implementation using this module
+
+=head1 AUTHOR
+
+Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>
+
+=head1 COPYRIGHT & LICENSE
+
+Copyright 2007 Dobrica Pavlinusic, All Rights Reserved.
+
+This program is free software; you can redistribute it and/or modify it
+under the same terms as Perl itself.
+
+=cut
 1;