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 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 vram

Push byte to video memory and draw it

  $screen->vram( $offset, $byte );

=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 ) {
                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;
}

=head2 render

Render one frame of video ram

  $self->render( @video_memory );

=cut

sub render {
        my $self = shift;

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

        my $pixels = pack("C*", @_);

        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);
        }
}

=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	33
16	dpavlin	56	use base qw(Class::Accessor Prefs);
17	dpavlin	98	__PACKAGE__->mk_accessors(qw(app event));
18	dpavlin	29
19	dpavlin	55	=head1 NAME
20
21			Screen - simulated 256*256 pixels monochrome screen using SDL
22
23	dpavlin	30	=head2 open_screen
24	dpavlin	29
25			Open simulated screen
26
27			=cut
28
29			our $app;
30
31	dpavlin	30	sub open_screen {
32	dpavlin	29	my $self = shift;
33	dpavlin	31
34	dpavlin	56	$self->prefs;
35
36	dpavlin	31	if ( ! $self->scale ) {
37			$self->scale( 1 );
38			warn "using default unscaled display\n";
39			}
40
41	dpavlin	29	$app = SDL::App->new(
42			-width => 256 * $self->scale + ( $self->show_mem ? 256 : 0 ),
43			-height => 256 * $self->scale,
44			-depth => 16,
45			);
46	dpavlin	75	#$app->grab_input( SDL_GRAB_QUERY );
47			$app->grab_input( SDL_GRAB_OFF );
48	dpavlin	29
49	dpavlin	98	$self->app( $app );
50
51			my $event = SDL::Event->new();
52			$self->event( $event );
53
54	dpavlin	29	warn "# created SDL::App\n";
55			}
56
57			my $white = SDL::Color->new( -r => 0xff, -g => 0xff, -b => 0xff );
58			my $black = SDL::Color->new( -r => 0x80, -g => 0x80, -b => 0x80 );
59
60			my $red = SDL::Color->new( -r => 0xff, -g => 0x00, -b => 0x00 );
61			my $green = SDL::Color->new( -r => 0x00, -g => 0xff, -b => 0x00 );
62			my $blue = SDL::Color->new( -r => 0x00, -g => 0x00, -b => 0xff );
63
64	dpavlin	76	my $rect_screen = SDL::Rect->new( -x => 0, -y => 0, -width => 256, -height => 256 );
65			my $rect_mem = SDL::Rect->new( -x => 256, -y => 0, -width => 256, -height => 256 );
66
67	dpavlin	29	=head2 p
68
69			$screen->p( $x, $y, 1 );
70
71			=cut
72
73			sub p {
74			my $self = shift;
75
76			my ($x,$y,$w) = (@_);
77
78			warn "p($x,$y,$w)\n" if $self->debug;
79
80			my $scale = $self->scale;
81			my $rect = SDL::Rect->new(
82			-height => $scale,
83			-width => $scale,
84			-x => $x * $scale,
85			-y => $y * $scale,
86			);
87
88			$app->fill( $rect, $w ? $white : $black );
89			$app->update( $rect );
90			}
91
92			=head2 mem_xy
93
94			Helper to return x and y coordinates in memory map
95
96			my ( $x,$y ) = $screen->mem_xy( $address );
97
98			=cut
99
100			sub mem_xy {
101			my $self = shift;
102			my $offset = shift;
103			my $x = $offset & 0xff;
104			$x += 256 * $self->scale;
105			my $y = $offset >> 8;
106			return ($x,$y);
107			}
108
109			=head2 vram
110
111			Push byte to video memory and draw it
112
113			$screen->vram( $offset, $byte );
114
115			=cut
116
117	dpavlin	37	my $_vram_counter;
118
119	dpavlin	29	sub vram {
120			my ( $self, $offset, $byte ) = @_;
121			my $x = ( $offset % 32 ) << 3;
122			my $y = $offset >> 5;
123			my $mask = 1;
124	dpavlin	37	my $scale = $self->scale;
125	dpavlin	29
126	dpavlin	45	printf "## vram %04x %02x*%02x %02x\n", $offset, $x, $y, $byte if $self->trace;
127	dpavlin	29
128			foreach ( 0 .. 7 ) {
129	dpavlin	37	my $on = $byte & $mask;
130			if ( $scale == 1 ) {
131			$app->pixel( $x + $_, $y, $on ? $white : $black );
132			} else {
133			$self->p($x + $_, $y, $on );
134			}
135	dpavlin	29	$mask = $mask << 1;
136			}
137	dpavlin	37
138			$app->sync if ( $_vram_counter++ % 10 == 0 );
139	dpavlin	29	}
140
141	dpavlin	32	=head2 mmap_pixel
142
143			Draw pixel in memory map
144
145			$self->mmap_pixel( $addr, $r, $g, $b );
146
147			=cut
148
149			# keep accesses to memory
150			my $_mem_stat;
151
152			sub mmap_pixel {
153			my ( $self, $addr, $r, $g, $b ) = @_;
154	dpavlin	33	return unless $self->show_mem && $self->app;
155	dpavlin	32
156	dpavlin	33	my ( $x, $y ) = $self->mem_xy( $addr );
157	dpavlin	41	warn sprintf "## mem %04x %02x %02x %02d*%02d\n", $addr, $r, $g, $x, $y if $self->debug;
158	dpavlin	32
159	dpavlin	33	my $col = SDL::Color->new( -r => $r, -g => $g, -b => $b );
160			$self->app->pixel( $x, $y, $col );
161	dpavlin	32
162			$_mem_stat++;
163			if ( $_mem_stat % 1000 == 0 ) {
164	dpavlin	33	$self->app->sync;
165	dpavlin	32	}
166			}
167
168	dpavlin	33
169			=head2 sync
170
171			$self->sync;
172
173			=cut
174
175			sub sync {
176			$app->sync;
177			}
178
179	dpavlin	73	=head2 render
180
181	dpavlin	76	Render one frame of video ram
182
183	dpavlin	73	$self->render( @video_memory );
184
185			=cut
186
187			sub render {
188			my $self = shift;
189
190			die "this function isn't supported if scale isn't 1" unless $self->scale == 1;
191
192	dpavlin	75	my $pixels = pack("C*", @_);
193	dpavlin	73
194	dpavlin	75	my $vram = SDL::Surface->new(
195			-width => 256,
196			-height => 256,
197			-depth => 1, # 1 bit per pixel
198			-pitch => 32, # bytes per line
199			-from => $pixels,
200			);
201			$vram->set_colors( 0, $black, $white, $red );
202			$vram->display_format;
203	dpavlin	73
204	dpavlin	75	my $rect = SDL::Rect->new( -x => 0, -y => 0, -width => 256, -height => 256 );
205	dpavlin	76	$vram->blit( $rect, $app, $rect_screen );
206	dpavlin	73
207			$app->sync;
208			}
209
210	dpavlin	76	=head2 render_mem
211
212			$self->render_mem( @ram );
213
214			=cut
215
216			sub render_mem {
217			my $self = shift;
218
219			return unless $self->show_mem;
220
221			my $pixels = pack("C*", @_);
222
223			my $vram = SDL::Surface->new(
224			-width => 256,
225			-height => 256,
226			-depth => 8, # 1 bit per pixel
227			-pitch => 256, # bytes per line
228			-from => $pixels,
229			-Rmask => 0xffff00ff,
230			-Gmask => 0xffff00ff,
231			-Bmask => 0xffff00ff,
232			);
233
234			$vram->display_format;
235
236			my $rect = SDL::Rect->new( -x => 0, -y => 0, -width => 256, -height => 256 );
237			$vram->blit( $rect, $app, $rect_mem );
238
239			$app->sync;
240			}
241
242	dpavlin	98	=head2 key_pressed
243
244			Check SDL event loop if there are any pending keys
245
246			my $key = $self->key_pressed;
247
248			if ( $self->key_pressed( 1 ) ) {
249			# just to check other events, don't process
250			# key
251			}
252
253			=cut
254
255			my $pending_key;
256			my $run_for = 2000;
257
258	dpavlin	103	my $key_down;
259
260			sub key_down {
261			my $self = shift;
262			my $key = shift;
263			warn "key_down($key) = ",$key_down->{$key}, "\n" if $self->debug;
264			return $key_down->{$key};
265			}
266
267	dpavlin	98	sub key_pressed {
268			my $self = shift;
269
270			# don't take key, just pull event
271	dpavlin	101	my $just_checking = shift \|\| 0;
272	dpavlin	98
273			my $event = $self->event \|\| confess "no event?";
274
275	dpavlin	99	$event->poll \|\| return $pending_key;
276	dpavlin	98
277			my $type = $event->type();
278
279			exit if ($type == SDL_QUIT);
280
281	dpavlin	99	my $k = $pending_key;
282	dpavlin	98
283			if ($type == SDL_KEYDOWN) {
284			$k = $event->key_name();
285	dpavlin	103	$key_down->{$k}++;
286	dpavlin	98	if ( $k eq 'escape' ) {
287			$run_for = $self->cli;
288			warn "will check event loop every $run_for cycles\n";
289	dpavlin	101	$pending_key = '~';
290	dpavlin	98	} else {
291	dpavlin	101	warn "SDL_KEYDOWN ($type) = '$k'", $just_checking ? ' fake' : '', "\n";
292			$pending_key = $k;
293	dpavlin	98	}
294			} elsif ( $type == SDL_KEYUP ) {
295			my $up = $event->key_name();
296	dpavlin	103	$key_down->{$up} = 0;
297	dpavlin	101	warn "SDL_KEYUP ($type) = '$up'", $just_checking ? ' fake' : '', "\n";
298	dpavlin	99	undef $pending_key;
299	dpavlin	98	}
300
301	dpavlin	99	warn "key_pressed = $pending_key\n" if $pending_key;
302
303			return $pending_key;
304	dpavlin	98	}
305
306	dpavlin	96	=head2 loop
307
308			Implement SDL event loop
309
310			=cut
311
312			sub loop {
313			my $self = shift;
314			my $event = SDL::Event->new();
315
316
317			MAIN_LOOP:
318			while ( 1 ) {
319	dpavlin	98	$self->key_pressed( 1 );
320	dpavlin	96	M6502::exec($run_for);
321			}
322			}
323
324	dpavlin	55	=head1 SEE ALSO
325
326			L<Orao> is sample implementation using this module
327
328			=head1 AUTHOR
329
330			Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>
331
332			=head1 COPYRIGHT & LICENSE
333
334			Copyright 2007 Dobrica Pavlinusic, All Rights Reserved.
335
336			This program is free software; you can redistribute it and/or modify it
337			under the same terms as Perl itself.
338
339			=cut
340	dpavlin	32	1;