viewvc.cgi/VRac/Screen.pm

package Screen;

# Dobrica Pavlinusic, <dpavlin@rot13.org> 07/30/07 17:58:55 CEST

use strict;
use warnings;

use SDL::App;
use SDL::Rect;
use SDL::Color;
use SDL::Constants;

use Carp qw/confess/;
use Data::Dump qw/dump/;
use M6502 qw'@mem';

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

=cut

our $app;

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 * $self->scale,
                -depth  => 16,
        );
        #$app->grab_input( SDL_GRAB_QUERY );
        $app->grab_input( SDL_GRAB_OFF );

        $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 );
my $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 );

my $rect_screen = SDL::Rect->new( -x => 0, -y => 0, -width => 256, -height => 256 );
my $rect_mem = SDL::Rect->new( -x => 256, -y => 0, -width => 256, -height => 256 );

=head2 p

 $screen->p( $x, $y, 1 );

=cut

sub p {
        my $self = shift;

        my ($x,$y,$w) = (@_);

        warn "p($x,$y,$w)\n" if $self->debug;

        my $scale = $self->scale;
        my $rect = SDL::Rect->new(
                -height => $scale,
                -width  => $scale,
                -x      => $x * $scale,
                -y      => $y * $scale,
        );

        $app->fill( $rect, $w ? $white : $black );
        $app->update( $rect );
}

=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( @video_memory );

=cut

my @flip;

foreach my $i ( 0 .. 255 ) {
        my $t = 0;
        $i & 0b00000001 and $t = $t | 0b10000000;
        $i & 0b00000010 and $t = $t | 0b01000000;
        $i & 0b00000100 and $t = $t | 0b00100000;
        $i & 0b00001000 and $t = $t | 0b00010000;
        $i & 0b00010000 and $t = $t | 0b00001000;
        $i & 0b00100000 and $t = $t | 0b00000100;
        $i & 0b01000000 and $t = $t | 0b00000010;
        $i & 0b10000000 and $t = $t | 0b00000001;
        warn "$i = $t\n";
        $flip[$i] = $t;
}


sub render_vram {
        my $self = shift;

        return unless $self->booted;

        die "this function isn't supported if scale isn't 1" unless $self->scale == 1;

        confess "no data?" unless (@_);
        confess "screen size not 256*256/8 but ",($#_+1) unless (($#_+1) == (256*256/8));


        my $pixels = pack("C*", map { $flip[$_] } @_);

        my $vram = SDL::Surface->new(
                -width => 256,
                -height => 256,
                -depth => 1,    # 1 bit per pixel
                -pitch => 32,   # bytes per line
                -from => $pixels,
        );
        $vram->set_colors( 0, $black, $white, $red );
        $vram->display_format;

        my $rect = SDL::Rect->new( -x => 0, -y => 0, -width => 256, -height => 256 );
        $vram->blit( $rect, $app, $rect_screen );

        $app->sync;
}

=head2 render_mem

  $self->render_mem( @ram );

=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,
        );

        $vram->display_format;

        my $rect = SDL::Rect->new( -x => 0, -y => 0, -width => 256, -height => 256 );
        $vram->blit( $rect, $app, $rect_mem );

        $app->sync;
}

=head2 key_pressed

Check SDL event loop if there are any pending keys

  my $key = $self->key_pressed;

  if ( $self->key_pressed( 1 ) ) {
        # just to check other events, don't process
        # key
  }

=cut

my $pending_key;
my $run_for = 2000;

my $key_down;

sub key_down {
        my $self = shift;
        my $key = shift;
        warn "key_down($key) = ",$key_down->{$key}, "\n" if $self->debug;
        return $key_down->{$key};
}

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?";

        $event->poll || 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;
                }
        } elsif ( $type == SDL_KEYUP ) {
                my $up = $event->key_name();
                $key_down->{$up} = 0;
                warn "SDL_KEYUP ($type) = '$up'", $just_checking ? ' fake' : '', "\n";
                undef $pending_key;
        }

        warn "key_pressed = $pending_key\n" if $pending_key;

        return $pending_key;
}

=head2 loop

Implement SDL event loop

=cut

sub loop {
        my $self = shift;
        my $event = SDL::Event->new();


        MAIN_LOOP:
        while ( 1 ) {
                $self->key_pressed( 1 );
                M6502::exec($run_for);
                $self->render_vram( @mem[ 0x6000 .. 0x7fff ] );
        }
}

=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;
1	dpavlin	29	package Screen;
2
3			# Dobrica Pavlinusic, <dpavlin@rot13.org> 07/30/07 17:58:55 CEST
4
5			use strict;
6			use warnings;
7
8			use SDL::App;
9			use SDL::Rect;
10			use SDL::Color;
11	dpavlin	75	use SDL::Constants;
12	dpavlin	29
13	dpavlin	33	use Carp qw/confess/;
14	dpavlin	75	use Data::Dump qw/dump/;
15	dpavlin	106	use M6502 qw'@mem';
16	dpavlin	33
17	dpavlin	56	use base qw(Class::Accessor Prefs);
18	dpavlin	98	__PACKAGE__->mk_accessors(qw(app event));
19	dpavlin	29
20	dpavlin	55	=head1 NAME
21
22			Screen - simulated 256*256 pixels monochrome screen using SDL
23
24	dpavlin	30	=head2 open_screen
25	dpavlin	29
26			Open simulated screen
27
28			=cut
29
30			our $app;
31
32	dpavlin	30	sub open_screen {
33	dpavlin	29	my $self = shift;
34	dpavlin	31
35	dpavlin	56	$self->prefs;
36
37	dpavlin	31	if ( ! $self->scale ) {
38			$self->scale( 1 );
39			warn "using default unscaled display\n";
40			}
41
42	dpavlin	29	$app = SDL::App->new(
43			-width => 256 * $self->scale + ( $self->show_mem ? 256 : 0 ),
44			-height => 256 * $self->scale,
45			-depth => 16,
46			);
47	dpavlin	75	#$app->grab_input( SDL_GRAB_QUERY );
48			$app->grab_input( SDL_GRAB_OFF );
49	dpavlin	29
50	dpavlin	98	$self->app( $app );
51
52			my $event = SDL::Event->new();
53			$self->event( $event );
54
55	dpavlin	29	warn "# created SDL::App\n";
56			}
57
58			my $white = SDL::Color->new( -r => 0xff, -g => 0xff, -b => 0xff );
59			my $black = SDL::Color->new( -r => 0x80, -g => 0x80, -b => 0x80 );
60
61			my $red = SDL::Color->new( -r => 0xff, -g => 0x00, -b => 0x00 );
62			my $green = SDL::Color->new( -r => 0x00, -g => 0xff, -b => 0x00 );
63			my $blue = SDL::Color->new( -r => 0x00, -g => 0x00, -b => 0xff );
64
65	dpavlin	76	my $rect_screen = SDL::Rect->new( -x => 0, -y => 0, -width => 256, -height => 256 );
66			my $rect_mem = SDL::Rect->new( -x => 256, -y => 0, -width => 256, -height => 256 );
67
68	dpavlin	29	=head2 p
69
70			$screen->p( $x, $y, 1 );
71
72			=cut
73
74			sub p {
75			my $self = shift;
76
77			my ($x,$y,$w) = (@_);
78
79			warn "p($x,$y,$w)\n" if $self->debug;
80
81			my $scale = $self->scale;
82			my $rect = SDL::Rect->new(
83			-height => $scale,
84			-width => $scale,
85			-x => $x * $scale,
86			-y => $y * $scale,
87			);
88
89			$app->fill( $rect, $w ? $white : $black );
90			$app->update( $rect );
91			}
92
93			=head2 mem_xy
94
95			Helper to return x and y coordinates in memory map
96
97			my ( $x,$y ) = $screen->mem_xy( $address );
98
99			=cut
100
101			sub mem_xy {
102			my $self = shift;
103			my $offset = shift;
104			my $x = $offset & 0xff;
105			$x += 256 * $self->scale;
106			my $y = $offset >> 8;
107			return ($x,$y);
108			}
109
110	dpavlin	32	=head2 mmap_pixel
111
112			Draw pixel in memory map
113
114			$self->mmap_pixel( $addr, $r, $g, $b );
115
116			=cut
117
118			# keep accesses to memory
119			my $_mem_stat;
120
121			sub mmap_pixel {
122			my ( $self, $addr, $r, $g, $b ) = @_;
123	dpavlin	33	return unless $self->show_mem && $self->app;
124	dpavlin	32
125	dpavlin	33	my ( $x, $y ) = $self->mem_xy( $addr );
126	dpavlin	41	warn sprintf "## mem %04x %02x %02x %02d*%02d\n", $addr, $r, $g, $x, $y if $self->debug;
127	dpavlin	32
128	dpavlin	33	my $col = SDL::Color->new( -r => $r, -g => $g, -b => $b );
129			$self->app->pixel( $x, $y, $col );
130	dpavlin	32
131			$_mem_stat++;
132			if ( $_mem_stat % 1000 == 0 ) {
133	dpavlin	33	$self->app->sync;
134	dpavlin	32	}
135			}
136
137	dpavlin	33
138			=head2 sync
139
140			$self->sync;
141
142			=cut
143
144			sub sync {
145			$app->sync;
146			}
147
148	dpavlin	107	=head2 render_vram
149	dpavlin	73
150	dpavlin	76	Render one frame of video ram
151
152	dpavlin	107	$self->render_vram( @video_memory );
153	dpavlin	73
154			=cut
155
156	dpavlin	107	my @flip;
157
158			foreach my $i ( 0 .. 255 ) {
159			my $t = 0;
160			$i & 0b00000001 and $t = $t \| 0b10000000;
161			$i & 0b00000010 and $t = $t \| 0b01000000;
162			$i & 0b00000100 and $t = $t \| 0b00100000;
163			$i & 0b00001000 and $t = $t \| 0b00010000;
164			$i & 0b00010000 and $t = $t \| 0b00001000;
165			$i & 0b00100000 and $t = $t \| 0b00000100;
166			$i & 0b01000000 and $t = $t \| 0b00000010;
167			$i & 0b10000000 and $t = $t \| 0b00000001;
168			warn "$i = $t\n";
169			$flip[$i] = $t;
170			}
171
172
173			sub render_vram {
174	dpavlin	73	my $self = shift;
175
176	dpavlin	106	return unless $self->booted;
177
178	dpavlin	73	die "this function isn't supported if scale isn't 1" unless $self->scale == 1;
179
180	dpavlin	106	confess "no data?" unless (@_);
181			confess "screen size not 256256/8 but ",($#_+1) unless (($#_+1) == (256256/8));
182
183	dpavlin	73
184	dpavlin	107	my $pixels = pack("C*", map { $flip[$_] } @_);
185
186	dpavlin	75	my $vram = SDL::Surface->new(
187			-width => 256,
188			-height => 256,
189			-depth => 1, # 1 bit per pixel
190			-pitch => 32, # bytes per line
191			-from => $pixels,
192			);
193			$vram->set_colors( 0, $black, $white, $red );
194			$vram->display_format;
195	dpavlin	73
196	dpavlin	75	my $rect = SDL::Rect->new( -x => 0, -y => 0, -width => 256, -height => 256 );
197	dpavlin	76	$vram->blit( $rect, $app, $rect_screen );
198	dpavlin	73
199			$app->sync;
200			}
201
202	dpavlin	76	=head2 render_mem
203
204			$self->render_mem( @ram );
205
206			=cut
207
208			sub render_mem {
209			my $self = shift;
210
211			return unless $self->show_mem;
212
213			my $pixels = pack("C*", @_);
214
215			my $vram = SDL::Surface->new(
216			-width => 256,
217			-height => 256,
218			-depth => 8, # 1 bit per pixel
219			-pitch => 256, # bytes per line
220			-from => $pixels,
221			-Rmask => 0xffff00ff,
222			-Gmask => 0xffff00ff,
223			-Bmask => 0xffff00ff,
224			);
225
226			$vram->display_format;
227
228			my $rect = SDL::Rect->new( -x => 0, -y => 0, -width => 256, -height => 256 );
229			$vram->blit( $rect, $app, $rect_mem );
230
231			$app->sync;
232			}
233
234	dpavlin	98	=head2 key_pressed
235
236			Check SDL event loop if there are any pending keys
237
238			my $key = $self->key_pressed;
239
240			if ( $self->key_pressed( 1 ) ) {
241			# just to check other events, don't process
242			# key
243			}
244
245			=cut
246
247			my $pending_key;
248			my $run_for = 2000;
249
250	dpavlin	103	my $key_down;
251
252			sub key_down {
253			my $self = shift;
254			my $key = shift;
255			warn "key_down($key) = ",$key_down->{$key}, "\n" if $self->debug;
256			return $key_down->{$key};
257			}
258
259	dpavlin	98	sub key_pressed {
260			my $self = shift;
261
262			# don't take key, just pull event
263	dpavlin	101	my $just_checking = shift \|\| 0;
264	dpavlin	98
265			my $event = $self->event \|\| confess "no event?";
266
267	dpavlin	99	$event->poll \|\| return $pending_key;
268	dpavlin	98
269			my $type = $event->type();
270
271			exit if ($type == SDL_QUIT);
272
273	dpavlin	99	my $k = $pending_key;
274	dpavlin	98
275			if ($type == SDL_KEYDOWN) {
276			$k = $event->key_name();
277	dpavlin	103	$key_down->{$k}++;
278	dpavlin	98	if ( $k eq 'escape' ) {
279			$run_for = $self->cli;
280			warn "will check event loop every $run_for cycles\n";
281	dpavlin	101	$pending_key = '~';
282	dpavlin	98	} else {
283	dpavlin	101	warn "SDL_KEYDOWN ($type) = '$k'", $just_checking ? ' fake' : '', "\n";
284			$pending_key = $k;
285	dpavlin	98	}
286			} elsif ( $type == SDL_KEYUP ) {
287			my $up = $event->key_name();
288	dpavlin	103	$key_down->{$up} = 0;
289	dpavlin	101	warn "SDL_KEYUP ($type) = '$up'", $just_checking ? ' fake' : '', "\n";
290	dpavlin	99	undef $pending_key;
291	dpavlin	98	}
292
293	dpavlin	99	warn "key_pressed = $pending_key\n" if $pending_key;
294
295			return $pending_key;
296	dpavlin	98	}
297
298	dpavlin	96	=head2 loop
299
300			Implement SDL event loop
301
302			=cut
303
304			sub loop {
305			my $self = shift;
306			my $event = SDL::Event->new();
307
308
309			MAIN_LOOP:
310			while ( 1 ) {
311	dpavlin	98	$self->key_pressed( 1 );
312	dpavlin	96	M6502::exec($run_for);
313	dpavlin	107	$self->render_vram( @mem[ 0x6000 .. 0x7fff ] );
314	dpavlin	96	}
315			}
316
317	dpavlin	55	=head1 SEE ALSO
318
319			L<Orao> is sample implementation using this module
320
321			=head1 AUTHOR
322
323			Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>
324
325			=head1 COPYRIGHT & LICENSE
326
327			Copyright 2007 Dobrica Pavlinusic, All Rights Reserved.
328
329			This program is free software; you can redistribute it and/or modify it
330			under the same terms as Perl itself.
331
332			=cut
333	dpavlin	32	1;