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 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

=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 * $self->scale,
                -depth  => 16,
                -flags=>SDL_DOUBLEBUF | SDL_HWSURFACE | SDL_HWACCEL,
        );
        #$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";
}

our $white      = SDL::Color->new( -r => 0xff, -g => 0xff, -b => 0xff );
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 );

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

=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

  $self->render_frame( $vram_sdl_surface );

=cut

sub render_frame {
        my $self = shift;

        my $vram = shift;
        confess "need SDL::Surface as argument" unless ref($vram) eq 'SDL::Surface';

        $vram->display_format;

        my $scale = $self->scale || confess "no scale?";

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

        $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 CPU run for C<$run_run> cycles inside SDL event loop

  $self->loop( sub {
        my $run_for = shift;
        CPU::exec( $run_for );
        $self->render_vram;
  } );

=cut

sub loop {
        my $self = shift;
        my $exec = shift;

        confess "need coderef as argument" unless ref($exec) eq 'CODE';
        my $event = SDL::Event->new();

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