--- M6502/Screen.pm	2007/07/30 17:56:13	30
+++ M6502/Screen.pm	2007/07/31 13:56:50	55
@@ -9,8 +9,14 @@
 use SDL::Rect;
 use SDL::Color;
 
+use Carp qw/confess/;
+
 use base qw(Class::Accessor);
-__PACKAGE__->mk_accessors(qw(debug scale show_mem run_for mem_dump trace));
+#__PACKAGE__->mk_accessors(qw(debug scale show_mem trace app));
+
+=head1 NAME
+
+Screen - simulated 256*256 pixels monochrome screen using SDL
 
 =head2 open_screen
 
@@ -22,6 +28,12 @@
 
 sub open_screen {
 	my $self = shift;
+
+	if ( ! $self->scale ) {
+		$self->scale( 1 );
+		warn "using default unscaled display\n";
+	}
+
 	$app = SDL::App->new(
 		-width  => 256 * $self->scale + ( $self->show_mem ? 256 : 0 ),
 		-height => 256 * $self->scale,
@@ -30,6 +42,7 @@
 	#$app->grab_input( 0 );
 
 	warn "# created SDL::App\n";
+	$self->app( $app );
 }
 
 my $white	= SDL::Color->new( -r => 0xff, -g => 0xff, -b => 0xff );
@@ -89,17 +102,82 @@
 
 =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 ) {
-		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
+
+Draw pixel in memory map
+
+  $self->mmap_pixel( $addr, $r, $g, $b );
+
+=cut
+
+# keep accesses to memory
+my $_mem_stat;
+
+sub mmap_pixel {
+	my ( $self, $addr, $r, $g, $b ) = @_;
+	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->debug;
+
+	my $col = SDL::Color->new( -r => $r, -g => $g, -b => $b );
+	$self->app->pixel( $x, $y, $col );
+
+	$_mem_stat++;
+	if ( $_mem_stat % 1000 == 0 ) {
+		$self->app->sync;
+	}
+}
+
+
+=head2 sync
+
+  $self->sync;
+
+=cut
+
+sub sync {
+	$app->sync;
+}
+
+=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;