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dpavlin |
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package Screen; |
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# Dobrica Pavlinusic, <dpavlin@rot13.org> 07/30/07 17:58:55 CEST |
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use strict; |
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use warnings; |
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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 base qw(Class::Accessor); |
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__PACKAGE__->mk_accessors(qw(debug scale show_mem run_for mem_dump trace)); |
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=head2 init |
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Open simulated screen |
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=cut |
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our $app; |
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sub init { |
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my $self = shift; |
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$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( 0 ); |
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warn "# created SDL::App\n"; |
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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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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 $blue = SDL::Color->new( -r => 0x00, -g => 0x00, -b => 0xff ); |
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=head2 p |
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$screen->p( $x, $y, 1 ); |
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=cut |
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sub p { |
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my $self = shift; |
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my ($x,$y,$w) = (@_); |
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warn "p($x,$y,$w)\n" if $self->debug; |
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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 * $scale, |
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); |
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$app->fill( $rect, $w ? $white : $black ); |
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$app->update( $rect ); |
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} |
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=head2 mem_xy |
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Helper to return x and y coordinates in memory map |
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my ( $x,$y ) = $screen->mem_xy( $address ); |
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=cut |
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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,$y); |
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} |
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=head2 vram |
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Push byte to video memory and draw it |
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$screen->vram( $offset, $byte ); |
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=cut |
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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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printf "## vram %04x %02x*%02x %02x\n", $offset, $x, $y, $byte if $self->trace; |
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foreach ( 0 .. 7 ) { |
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p($x + $_, $y, $byte & $mask ); |
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$mask = $mask << 1; |
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} |
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} |
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