/[VRac]/M6502/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 30 by dpavlin, Mon Jul 30 17:56:13 2007 UTC revision 103 by dpavlin, Thu Aug 2 18:01:51 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 base qw(Class::Accessor);  use Carp qw/confess/;
14  __PACKAGE__->mk_accessors(qw(debug scale show_mem run_for mem_dump trace));  use Data::Dump qw/dump/;
15    
16    use base qw(Class::Accessor Prefs);
17    __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 22  our $app; Line 30  our $app;
30    
31  sub open_screen {  sub open_screen {
32          my $self = shift;          my $self = shift;
33    
34            $self->prefs;
35    
36            if ( ! $self->scale ) {
37                    $self->scale( 1 );
38                    warn "using default unscaled display\n";
39            }
40    
41          $app = SDL::App->new(          $app = SDL::App->new(
42                  -width  => 256 * $self->scale + ( $self->show_mem ? 256 : 0 ),                  -width  => 256 * $self->scale + ( $self->show_mem ? 256 : 0 ),
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    
49            $self->app( $app );
50    
51            my $event = SDL::Event->new();
52            $self->event( $event );
53    
54          warn "# created SDL::App\n";          warn "# created SDL::App\n";
55  }  }
# Line 39  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 89  Push byte to video memory and draw it Line 114  Push byte to video memory and draw it
114    
115  =cut  =cut
116    
117    my $_vram_counter;
118    
119  sub vram {  sub vram {
120          my ( $self, $offset, $byte ) = @_;          my ( $self, $offset, $byte ) = @_;
121          my $x = ( $offset % 32 ) << 3;          my $x = ( $offset % 32 ) << 3;
122          my $y = $offset >> 5;          my $y = $offset >> 5;
123          my $mask = 1;          my $mask = 1;
124            my $scale = $self->scale;
125    
126          printf "## vram %04x %02x*%02x %02x\n", $offset, $x, $y, $byte if $self->trace;          printf "## vram %04x %02x*%02x %02x\n", $offset, $x, $y, $byte if $self->trace;
127    
128          foreach ( 0 .. 7 ) {          foreach ( 0 .. 7 ) {
129                  p($x + $_, $y, $byte & $mask );                  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                  $mask = $mask << 1;                  $mask = $mask << 1;
136          }          }
137    
138            $app->sync if ( $_vram_counter++ % 10 == 0 );
139  }  }
140    
141    =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            return unless $self->show_mem && $self->app;
155    
156            my ( $x, $y ) = $self->mem_xy( $addr );
157            warn sprintf "## mem %04x %02x %02x %02d*%02d\n", $addr, $r, $g, $x, $y if $self->debug;
158    
159            my $col = SDL::Color->new( -r => $r, -g => $g, -b => $b );
160            $self->app->pixel( $x, $y, $col );
161    
162            $_mem_stat++;
163            if ( $_mem_stat % 1000 == 0 ) {
164                    $self->app->sync;
165            }
166    }
167    
168    
169    =head2 sync
170    
171      $self->sync;
172    
173    =cut
174    
175    sub sync {
176            $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    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    sub key_pressed {
268            my $self = shift;
269    
270            # don't take key, just pull event
271            my $just_checking = shift || 0;
272    
273            my $event = $self->event || confess "no event?";
274    
275            $event->poll || return $pending_key;
276    
277            my $type = $event->type();
278    
279            exit if ($type == SDL_QUIT);
280    
281            my $k = $pending_key;
282    
283            if ($type == SDL_KEYDOWN) {
284                    $k = $event->key_name();
285                    $key_down->{$k}++;
286                    if ( $k eq 'escape' ) {
287                            $run_for = $self->cli;
288                            warn "will check event loop every $run_for cycles\n";
289                            $pending_key = '~';
290                    } else {
291                            warn "SDL_KEYDOWN ($type) = '$k'", $just_checking ? ' fake' : '', "\n";
292                            $pending_key = $k;
293                    }
294            } elsif ( $type == SDL_KEYUP ) {
295                    my $up = $event->key_name();
296                    $key_down->{$up} = 0;
297                    warn "SDL_KEYUP ($type) = '$up'", $just_checking ? ' fake' : '', "\n";
298                    undef $pending_key;
299            }
300    
301            warn "key_pressed = $pending_key\n" if $pending_key;
302    
303            return $pending_key;
304    }
305    
306    =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                    $self->key_pressed( 1 );
320                    M6502::exec($run_for);
321            }
322    }
323    
324    =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    1;
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