/[VRac]/Screen.pm

This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!

Diff of /Screen.pm

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-M6502/Screen.pm
revision 29 by dpavlin,
Mon Jul 30 17:32:41 2007 UTC
+Screen.pm
revision 152 by dpavlin,
Sun Aug  5 15:24:22 2007 UTC
 Line 8 
 use warnings;
  use SDL::App;
  use SDL::Rect;
  use SDL::Color;
+ use SDL::Constants;
- use base qw(Class::Accessor);
+ use Carp qw/confess/;
- __PACKAGE__->mk_accessors(qw(debug scale show_mem run_for mem_dump trace));
+ use Data::Dump qw/dump/;
- =head2 init
+ use Exporter 'import';
+ our @EXPORT = qw'$white $black';
+ use base qw(Class::Accessor Prefs);
+ __PACKAGE__->mk_accessors(qw(app event));
+ =head1 NAME
+ Screen - simulated 256*256 pixels monochrome screen using SDL
+ =head2 open_screen
  Open simulated screen
-Line 20 
 Open simulated screen
+Line 31 
 Open simulated screen
  our $app;
- sub init {
+ sub open_screen {
          my $self = shift;
+         $self->prefs;
+         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 * $self->scale,
                  -depth  => 16,
+                 -flags=>SDL_DOUBLEBUF | SDL_HWSURFACE | SDL_HWACCEL,
          );
-         #$app->grab_input( 0 );
+         #$app->grab_input( SDL_GRAB_QUERY );
+         $app->grab_input( SDL_GRAB_OFF );
+         $app->title( ref($self) . ' ' . $self::VERSION );
+         $self->app( $app );
+         my $event = SDL::Event->new();
+         $self->event( $event );
          warn "# created SDL::App\n";
  }
- my $white       = SDL::Color->new( -r => 0xff, -g => 0xff, -b => 0xff );
+ our $white      = SDL::Color->new( -r => 0xff, -g => 0xff, -b => 0xff );
- my $black       = SDL::Color->new( -r => 0x80, -g => 0x80, -b => 0x80 );
+ our $black      = SDL::Color->new( -r => 0x80, -g => 0x80, -b => 0x80 );
  my $red         = SDL::Color->new( -r => 0xff, -g => 0x00, -b => 0x00 );
  my $green       = SDL::Color->new( -r => 0x00, -g => 0xff, -b => 0x00 );
  my $blue        = SDL::Color->new( -r => 0x00, -g => 0x00, -b => 0xff );
- =head2 p
+ =head2 mem_xy
+ Helper to return x and y coordinates in memory map
+   my ( $x,$y ) = $screen->mem_xy( $address );
+ =cut
+ sub mem_xy {
+         my $self = shift;
+         my $offset = shift;
+         my $x = $offset & 0xff;
+         $x += 256 * $self->scale;
+         my $y = $offset >> 8;
+         return ($x,$y);
+ }
+ =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;
+ }
+ =head2 render_vram
+ Render one frame of video ram
+   $self->render_vram;
+ =cut
+ sub render_vram {
+         my $self = shift;
+         confess "please implement $self::render_vram";
+ }
+ =head2 render_frame
+ Render one frame of video ram
-  $screen->p( $x, $y, 1 );
+   $self->render_frame( $vram_sdl_surface );
  =cut
- sub p {
+ sub render_frame {
          my $self = shift;
-         my ($x,$y,$w) = (@_);
+         my $vram = shift;
+         confess "need SDL::Surface as argument" unless ref($vram) eq 'SDL::Surface';
-         warn "p($x,$y,$w)\n" if $self->debug;
+         $vram->display_format;
-         my $scale = $self->scale;
+         my $scale = $self->scale || confess "no scale?";
-         my $rect = SDL::Rect->new(
-                 -height => $scale,
+         my $rect        = SDL::Rect->new( -x => 0, -y => 0, -width => 256 * $scale, -height => 256 * $scale );
-                 -width  => $scale,
+         my $rect_screen = SDL::Rect->new( -x => 0, -y => 0, -width => 256 * $scale, -height => 256 * $scale );
-                 -x      => $x * $scale,
-                 -y      => $y * $scale,
+         if ( $scale > 1 ) {
+                 use SDL::Tool::Graphic;
+                 # last parametar is anti-alias
+                 my $zoomed = SDL::Tool::Graphic->zoom( $vram, $self->scale, $self->scale, 1 );
+                 $zoomed->blit( $rect, $app, $rect_screen );
+         } else {
+                 $vram->blit( $rect, $app, $rect_screen );
+         }
+         $app->sync;
+ }
+ =head2 render_mem
+   $self->render_mem( @mem );
+ =cut
+ sub render_mem {
+         my $self = shift;
+         return unless $self->show_mem;
+         my $pixels = pack("C*", @_);
+         my $vram = SDL::Surface->new(
+                 -width => 256,
+                 -height => 256,
+                 -depth => 8,    # 1 bit per pixel
+                 -pitch => 256,  # bytes per line
+                 -from => $pixels,
+                 -Rmask => 0xffff00ff,
+                 -Gmask => 0xffff00ff,
+                 -Bmask => 0xffff00ff,
          );
-         $app->fill( $rect, $w ? $white : $black );
+         $vram->display_format;
-         $app->update( $rect );
+         my $rect     = SDL::Rect->new( -x => 0, -y => 0, -width => 256, -height => 256 );
+         my $rect_mem = SDL::Rect->new( -x => 256 * $self->scale, -y => 0, -width => 256, -height => 256 );
+         $vram->blit( $rect, $app, $rect_mem );
+         $app->sync;
  }
- =head2 mem_xy
+ =head2 key_pressed
- Helper to return x and y coordinates in memory map
+ Check SDL event loop if there are any pending keys
-   my ( $x,$y ) = $screen->mem_xy( $address );
+   my $key = $self->key_pressed;
+   if ( $self->key_pressed( 1 ) ) {
+         # just to check other events, don't process
+         # key
+   }
  =cut
- sub mem_xy {
+ my $pending_key;
+ my $run_for = 2000;
+ my $key_down;
+ sub key_down {
          my $self = shift;
-         my $offset = shift;
+         my $key = shift;
-         my $x = $offset & 0xff;
+         warn "key_down($key) = ",$key_down->{$key}, "\n" if $self->debug;
-         $x += 256 * $self->scale;
+         return $key_down->{$key};
-         my $y = $offset >> 8;
+ }
-         return ($x,$y);
+ sub key_pressed {
+         my $self = shift;
+         # don't take key, just pull event
+         my $just_checking = shift || 0;
+         my $event = $self->event || confess "no event?";
+         if ( ! $event->poll ) {
+                 if ( my $h = $self->session_event('key_pressed') ) {
+                         my ( $key, $state ) = %$h;
+                         if ( $state ) {
+                                 $pending_key = $key;
+                                 $key_down->{$key}++;
+                         } else {
+                                 undef $pending_key;
+                                 $key_down->{$key} = 0;
+                         }
+                 }
+                 return $pending_key;
+         }
+         my $type = $event->type();
+         exit if ($type == SDL_QUIT);
+         my $k = $pending_key;
+         if ($type == SDL_KEYDOWN) {
+                 $k = $event->key_name();
+                 $key_down->{$k}++;
+                 if ( $k eq 'escape' ) {
+                         $run_for = $self->cli;
+                         warn "will check event loop every $run_for cycles\n";
+                         $pending_key = '~';
+                 } else {
+                         warn "SDL_KEYDOWN ($type) = '$k'", $just_checking ? ' fake' : '', "\n";
+                         $pending_key = $k;
+                         $self->record_session('key_pressed', { $k => 1 });
+                 }
+         } elsif ( $type == SDL_KEYUP ) {
+                 my $up = $event->key_name();
+                 warn "SDL_KEYUP ($type) = '$up'", $just_checking ? ' fake' : '', "\n";
+                 $self->record_session('key_pressed', { $up => 0 });
+                 $key_down->{$up} = 0;
+                 undef $pending_key;
+         }
+         warn "key_pressed = $pending_key\n" if ( $pending_key );
+         return $pending_key;
  }
- =head2 vram
+ =head2 loop
- Push byte to video memory and draw it
+ Implement CPU run for C<$run_run> cycles inside SDL event loop
-   $screen->vram( $offset, $byte );
+   $self->loop( sub {
+         my $run_for = shift;
+         CPU::exec( $run_for );
+         $self->render_vram;
+   } );
  =cut
- sub vram {
+ sub loop {
-         my ( $self, $offset, $byte ) = @_;
+         my $self = shift;
-         my $x = ( $offset % 32 ) << 3;
+         my $exec = shift;
-         my $y = $offset >> 5;
-         my $mask = 1;
-         printf "## vram %04x %02x*%02x %02x\n", $offset, $x, $y, $byte if $self->trace;
+         confess "need coderef as argument" unless ref($exec) eq 'CODE';
+         my $event = SDL::Event->new();
-         foreach ( 0 .. 7 ) {
+         while ( 1 ) {
-                 p($x + $_, $y, $byte & $mask );
+                 $self->key_pressed( 1 );
-                 $mask = $mask << 1;
+                 $exec->($run_for);
          }
  }
+ =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
+;

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