/[VRac]/Screen.pm
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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revision 45 by dpavlin, Tue Jul 31 09:43:50 2007 UTC revision 98 by dpavlin, Thu Aug 2 16:01:16 2007 UTC
# Line 8  use warnings; Line 8  use warnings;
8  use SDL::App;  use SDL::App;
9  use SDL::Rect;  use SDL::Rect;
10  use SDL::Color;  use SDL::Color;
11    use SDL::Constants;
12    
13  use Carp qw/confess/;  use Carp qw/confess/;
14    use Data::Dump qw/dump/;
15    
16  use base qw(Class::Accessor);  use base qw(Class::Accessor Prefs);
17  __PACKAGE__->mk_accessors(qw(debug scale show_mem mem_dump trace app));  __PACKAGE__->mk_accessors(qw(app event));
18    
19    =head1 NAME
20    
21    Screen - simulated 256*256 pixels monochrome screen using SDL
22    
23  =head2 open_screen  =head2 open_screen
24    
# Line 25  our $app; Line 31  our $app;
31  sub open_screen {  sub open_screen {
32          my $self = shift;          my $self = shift;
33    
34            $self->prefs;
35    
36          if ( ! $self->scale ) {          if ( ! $self->scale ) {
37                  $self->scale( 1 );                  $self->scale( 1 );
38                  warn "using default unscaled display\n";                  warn "using default unscaled display\n";
# Line 35  sub open_screen { Line 43  sub open_screen {
43                  -height => 256 * $self->scale,                  -height => 256 * $self->scale,
44                  -depth  => 16,                  -depth  => 16,
45          );          );
46          #$app->grab_input( 0 );          #$app->grab_input( SDL_GRAB_QUERY );
47            $app->grab_input( SDL_GRAB_OFF );
48    
         warn "# created SDL::App\n";  
49          $self->app( $app );          $self->app( $app );
50    
51            my $event = SDL::Event->new();
52            $self->event( $event );
53    
54            warn "# created SDL::App\n";
55  }  }
56    
57  my $white       = SDL::Color->new( -r => 0xff, -g => 0xff, -b => 0xff );  my $white       = SDL::Color->new( -r => 0xff, -g => 0xff, -b => 0xff );
# Line 48  my $red                = SDL::Color->new( -r => 0xff, Line 61  my $red                = SDL::Color->new( -r => 0xff,
61  my $green       = SDL::Color->new( -r => 0x00, -g => 0xff, -b => 0x00 );  my $green       = SDL::Color->new( -r => 0x00, -g => 0xff, -b => 0x00 );
62  my $blue        = SDL::Color->new( -r => 0x00, -g => 0x00, -b => 0xff );  my $blue        = SDL::Color->new( -r => 0x00, -g => 0x00, -b => 0xff );
63    
64    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  =head2 p  =head2 p
68    
69   $screen->p( $x, $y, 1 );   $screen->p( $x, $y, 1 );
# Line 160  sub sync { Line 176  sub sync {
176          $app->sync;          $app->sync;
177  }  }
178    
179    =head2 render
180    
181    Render one frame of video ram
182    
183      $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            my $pixels = pack("C*", @_);
193    
194            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    
204            my $rect = SDL::Rect->new( -x => 0, -y => 0, -width => 256, -height => 256 );
205            $vram->blit( $rect, $app, $rect_screen );
206    
207            $app->sync;
208    }
209    
210    =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    =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    sub key_pressed {
259            my $self = shift;
260    
261            # don't take key, just pull event
262            my $just_checking = shift;
263    
264            if ( defined($pending_key) ) {
265                    my $k = $pending_key;
266                    undef $pending_key unless $just_checking;
267                    return $k;
268            }
269    
270            my $event = $self->event || confess "no event?";
271    
272            $event->poll || return;
273    
274            my $type = $event->type();
275    
276            exit if ($type == SDL_QUIT);
277    
278            my $k;
279    
280            if ($type == SDL_KEYDOWN) {
281                    $k = $event->key_name();
282                    if ( $k eq 'escape' ) {
283                            $run_for = $self->cli;
284                            warn "will check event loop every $run_for cycles\n";
285                    } else {
286                            warn "SDL_KEYDOWN ($type) = '$k'\n";
287                            $pending_key = $k if $just_checking;
288                    }
289            } elsif ( $type == SDL_KEYUP ) {
290                    my $up = $event->key_name();
291                    warn "SDL_KEYUP ($type) = '$up'\n";
292            }
293    
294            return $k;
295    }
296    
297    =head2 loop
298    
299    Implement SDL event loop
300    
301    =cut
302    
303    sub loop {
304            my $self = shift;
305            my $event = SDL::Event->new();
306    
307    
308            MAIN_LOOP:
309            while ( 1 ) {
310                    $self->key_pressed( 1 );
311                    M6502::exec($run_for);
312            }
313    }
314    
315    =head1 SEE ALSO
316    
317    L<Orao> is sample implementation using this module
318    
319    =head1 AUTHOR
320    
321    Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>
322    
323    =head1 COPYRIGHT & LICENSE
324    
325    Copyright 2007 Dobrica Pavlinusic, All Rights Reserved.
326    
327    This program is free software; you can redistribute it and/or modify it
328    under the same terms as Perl itself.
329    
330    =cut
331  1;  1;
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