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package Screen; |
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|
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# Dobrica Pavlinusic, <dpavlin@rot13.org> 07/30/07 17:58:55 CEST |
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|
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use strict; |
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use warnings; |
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|
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use SDL::App; |
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use SDL::Rect; |
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use SDL::Color; |
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use SDL::Constants; |
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|
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use Carp qw/confess/; |
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use Data::Dump qw/dump/; |
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|
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use base qw(Class::Accessor Prefs); |
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__PACKAGE__->mk_accessors(qw(app event)); |
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|
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=head1 NAME |
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|
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Screen - simulated 256*256 pixels monochrome screen using SDL |
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|
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=head2 open_screen |
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|
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Open simulated screen |
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|
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=cut |
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|
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our $app; |
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|
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sub open_screen { |
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my $self = shift; |
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|
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$self->prefs; |
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|
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if ( ! $self->scale ) { |
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$self->scale( 1 ); |
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warn "using default unscaled display\n"; |
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} |
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|
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$app = SDL::App->new( |
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-width => 256 * $self->scale + ( $self->show_mem ? 256 : 0 ), |
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-height => 256 * $self->scale, |
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-depth => 16, |
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); |
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#$app->grab_input( SDL_GRAB_QUERY ); |
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$app->grab_input( SDL_GRAB_OFF ); |
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|
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$self->app( $app ); |
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|
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my $event = SDL::Event->new(); |
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$self->event( $event ); |
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|
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warn "# created SDL::App\n"; |
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} |
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|
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my $white = SDL::Color->new( -r => 0xff, -g => 0xff, -b => 0xff ); |
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my $black = SDL::Color->new( -r => 0x80, -g => 0x80, -b => 0x80 ); |
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|
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my $red = SDL::Color->new( -r => 0xff, -g => 0x00, -b => 0x00 ); |
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my $green = SDL::Color->new( -r => 0x00, -g => 0xff, -b => 0x00 ); |
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my $blue = SDL::Color->new( -r => 0x00, -g => 0x00, -b => 0xff ); |
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|
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my $rect_screen = SDL::Rect->new( -x => 0, -y => 0, -width => 256, -height => 256 ); |
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my $rect_mem = SDL::Rect->new( -x => 256, -y => 0, -width => 256, -height => 256 ); |
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|
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=head2 p |
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|
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$screen->p( $x, $y, 1 ); |
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|
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=cut |
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|
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sub p { |
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my $self = shift; |
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|
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my ($x,$y,$w) = (@_); |
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|
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warn "p($x,$y,$w)\n" if $self->debug; |
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|
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my $scale = $self->scale; |
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my $rect = SDL::Rect->new( |
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-height => $scale, |
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-width => $scale, |
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-x => $x * $scale, |
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-y => $y * $scale, |
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); |
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|
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$app->fill( $rect, $w ? $white : $black ); |
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$app->update( $rect ); |
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} |
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|
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=head2 mem_xy |
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|
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Helper to return x and y coordinates in memory map |
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|
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my ( $x,$y ) = $screen->mem_xy( $address ); |
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|
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=cut |
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|
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sub mem_xy { |
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my $self = shift; |
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my $offset = shift; |
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my $x = $offset & 0xff; |
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$x += 256 * $self->scale; |
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my $y = $offset >> 8; |
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return ($x,$y); |
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} |
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|
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=head2 vram |
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|
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Push byte to video memory and draw it |
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|
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$screen->vram( $offset, $byte ); |
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|
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=cut |
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|
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my $_vram_counter; |
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|
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sub vram { |
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my ( $self, $offset, $byte ) = @_; |
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my $x = ( $offset % 32 ) << 3; |
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my $y = $offset >> 5; |
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my $mask = 1; |
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my $scale = $self->scale; |
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|
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printf "## vram %04x %02x*%02x %02x\n", $offset, $x, $y, $byte if $self->trace; |
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|
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foreach ( 0 .. 7 ) { |
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my $on = $byte & $mask; |
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if ( $scale == 1 ) { |
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$app->pixel( $x + $_, $y, $on ? $white : $black ); |
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} else { |
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$self->p($x + $_, $y, $on ); |
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} |
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$mask = $mask << 1; |
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} |
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|
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$app->sync if ( $_vram_counter++ % 10 == 0 ); |
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} |
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|
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=head2 mmap_pixel |
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|
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Draw pixel in memory map |
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|
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$self->mmap_pixel( $addr, $r, $g, $b ); |
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|
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=cut |
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|
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# keep accesses to memory |
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my $_mem_stat; |
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|
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sub mmap_pixel { |
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my ( $self, $addr, $r, $g, $b ) = @_; |
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return unless $self->show_mem && $self->app; |
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|
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my ( $x, $y ) = $self->mem_xy( $addr ); |
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warn sprintf "## mem %04x %02x %02x %02d*%02d\n", $addr, $r, $g, $x, $y if $self->debug; |
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|
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my $col = SDL::Color->new( -r => $r, -g => $g, -b => $b ); |
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$self->app->pixel( $x, $y, $col ); |
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|
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$_mem_stat++; |
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if ( $_mem_stat % 1000 == 0 ) { |
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$self->app->sync; |
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} |
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} |
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|
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|
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=head2 sync |
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|
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$self->sync; |
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|
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=cut |
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|
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sub sync { |
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$app->sync; |
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} |
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|
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=head2 render |
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|
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Render one frame of video ram |
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|
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$self->render( @video_memory ); |
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|
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=cut |
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|
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sub render { |
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my $self = shift; |
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|
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die "this function isn't supported if scale isn't 1" unless $self->scale == 1; |
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|
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my $pixels = pack("C*", @_); |
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|
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my $vram = SDL::Surface->new( |
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-width => 256, |
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-height => 256, |
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-depth => 1, # 1 bit per pixel |
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-pitch => 32, # bytes per line |
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-from => $pixels, |
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); |
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$vram->set_colors( 0, $black, $white, $red ); |
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$vram->display_format; |
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|
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my $rect = SDL::Rect->new( -x => 0, -y => 0, -width => 256, -height => 256 ); |
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$vram->blit( $rect, $app, $rect_screen ); |
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|
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$app->sync; |
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} |
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|
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=head2 render_mem |
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|
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$self->render_mem( @ram ); |
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|
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=cut |
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|
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sub render_mem { |
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my $self = shift; |
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|
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return unless $self->show_mem; |
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|
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my $pixels = pack("C*", @_); |
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|
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my $vram = SDL::Surface->new( |
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-width => 256, |
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-height => 256, |
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-depth => 8, # 1 bit per pixel |
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-pitch => 256, # bytes per line |
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-from => $pixels, |
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-Rmask => 0xffff00ff, |
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-Gmask => 0xffff00ff, |
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-Bmask => 0xffff00ff, |
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); |
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|
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$vram->display_format; |
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|
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my $rect = SDL::Rect->new( -x => 0, -y => 0, -width => 256, -height => 256 ); |
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$vram->blit( $rect, $app, $rect_mem ); |
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|
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$app->sync; |
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} |
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|
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=head2 key_pressed |
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Check SDL event loop if there are any pending keys |
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|
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my $key = $self->key_pressed; |
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|
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if ( $self->key_pressed( 1 ) ) { |
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# just to check other events, don't process |
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# key |
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} |
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|
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=cut |
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|
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my $pending_key; |
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my $run_for = 2000; |
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|
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sub key_pressed { |
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my $self = shift; |
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|
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# don't take key, just pull event |
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my $just_checking = shift; |
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|
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my $event = $self->event || confess "no event?"; |
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|
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$event->poll || return $pending_key; |
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|
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my $type = $event->type(); |
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|
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exit if ($type == SDL_QUIT); |
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|
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my $k = $pending_key; |
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|
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if ($type == SDL_KEYDOWN) { |
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$k = $event->key_name(); |
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if ( $k eq 'escape' ) { |
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$run_for = $self->cli; |
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warn "will check event loop every $run_for cycles\n"; |
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} else { |
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warn "SDL_KEYDOWN ($type) = '$k'\n"; |
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$pending_key = $k if $just_checking; |
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} |
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} elsif ( $type == SDL_KEYUP ) { |
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my $up = $event->key_name(); |
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warn "SDL_KEYUP ($type) = '$up'\n"; |
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undef $pending_key; |
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} |
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warn "key_pressed = $pending_key\n" if $pending_key; |
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return $pending_key; |
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} |
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|
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=head2 loop |
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|
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Implement SDL event loop |
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|
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=cut |
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|
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sub loop { |
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my $self = shift; |
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my $event = SDL::Event->new(); |
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|
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|
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MAIN_LOOP: |
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while ( 1 ) { |
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$self->key_pressed( 1 ); |
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M6502::exec($run_for); |
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} |
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} |
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|
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=head1 SEE ALSO |
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|
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L<Orao> is sample implementation using this module |
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|
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=head1 AUTHOR |
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|
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Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |
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|
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=head1 COPYRIGHT & LICENSE |
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|
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Copyright 2007 Dobrica Pavlinusic, All Rights Reserved. |
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|
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This program is free software; you can redistribute it and/or modify it |
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under the same terms as Perl itself. |
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|
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=cut |
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