/[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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M6502/Screen.pm revision 33 by dpavlin, Mon Jul 30 21:00:36 2007 UTC Screen.pm revision 152 by dpavlin, Sun Aug 5 15:24:22 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 Exporter 'import';
17  __PACKAGE__->mk_accessors(qw(debug scale show_mem mem_dump trace app));  our @EXPORT = qw'$white $black';
18    
19    use base qw(Class::Accessor Prefs);
20    __PACKAGE__->mk_accessors(qw(app event));
21    
22    =head1 NAME
23    
24    Screen - simulated 256*256 pixels monochrome screen using SDL
25    
26  =head2 open_screen  =head2 open_screen
27    
# Line 25  our $app; Line 34  our $app;
34  sub open_screen {  sub open_screen {
35          my $self = shift;          my $self = shift;
36    
37            $self->prefs;
38    
39          if ( ! $self->scale ) {          if ( ! $self->scale ) {
40                  $self->scale( 1 );                  $self->scale( 1 );
41                  warn "using default unscaled display\n";                  warn "using default unscaled display\n";
# Line 34  sub open_screen { Line 45  sub open_screen {
45                  -width  => 256 * $self->scale + ( $self->show_mem ? 256 : 0 ),                  -width  => 256 * $self->scale + ( $self->show_mem ? 256 : 0 ),
46                  -height => 256 * $self->scale,                  -height => 256 * $self->scale,
47                  -depth  => 16,                  -depth  => 16,
48                    -flags=>SDL_DOUBLEBUF | SDL_HWSURFACE | SDL_HWACCEL,
49          );          );
50          #$app->grab_input( 0 );          #$app->grab_input( SDL_GRAB_QUERY );
51            $app->grab_input( SDL_GRAB_OFF );
52            $app->title( ref($self) . ' ' . $self::VERSION );
53    
         warn "# created SDL::App\n";  
54          $self->app( $app );          $self->app( $app );
55    
56            my $event = SDL::Event->new();
57            $self->event( $event );
58    
59            warn "# created SDL::App\n";
60  }  }
61    
62  my $white       = SDL::Color->new( -r => 0xff, -g => 0xff, -b => 0xff );  our $white      = SDL::Color->new( -r => 0xff, -g => 0xff, -b => 0xff );
63  my $black       = SDL::Color->new( -r => 0x80, -g => 0x80, -b => 0x80 );  our $black      = SDL::Color->new( -r => 0x80, -g => 0x80, -b => 0x80 );
64    
65  my $red         = SDL::Color->new( -r => 0xff, -g => 0x00, -b => 0x00 );  my $red         = SDL::Color->new( -r => 0xff, -g => 0x00, -b => 0x00 );
66  my $green       = SDL::Color->new( -r => 0x00, -g => 0xff, -b => 0x00 );  my $green       = SDL::Color->new( -r => 0x00, -g => 0xff, -b => 0x00 );
67  my $blue        = SDL::Color->new( -r => 0x00, -g => 0x00, -b => 0xff );  my $blue        = SDL::Color->new( -r => 0x00, -g => 0x00, -b => 0xff );
68    
 =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 );  
 }  
   
69  =head2 mem_xy  =head2 mem_xy
70    
71  Helper to return x and y coordinates in memory map  Helper to return x and y coordinates in memory map
# Line 90  sub mem_xy { Line 83  sub mem_xy {
83          return ($x,$y);          return ($x,$y);
84  }  }
85    
 =head2 vram  
   
 Push byte to video memory and draw it  
   
   $screen->vram( $offset, $byte );  
   
 =cut  
   
 sub vram {  
         my ( $self, $offset, $byte ) = @_;  
         my $x = ( $offset % 32 ) << 3;  
         my $y = $offset >> 5;  
         my $mask = 1;  
   
         printf "## vram %04x %02x*%02x %02x\n", $offset, $x, $y, $byte if $self->trace;  
   
         foreach ( 0 .. 7 ) {  
                 p($x + $_, $y, $byte & $mask );  
                 $mask = $mask << 1;  
         }  
 }  
   
86  =head2 mmap_pixel  =head2 mmap_pixel
87    
88  Draw pixel in memory map  Draw pixel in memory map
# Line 128  sub mmap_pixel { Line 99  sub mmap_pixel {
99          return unless $self->show_mem && $self->app;          return unless $self->show_mem && $self->app;
100    
101          my ( $x, $y ) = $self->mem_xy( $addr );          my ( $x, $y ) = $self->mem_xy( $addr );
102          warn sprintf "## mem %04x %02x %02x %02d*%02d\n", $addr, $r, $g, $x, $y if $self->trace;          warn sprintf "## mem %04x %02x %02x %02d*%02d\n", $addr, $r, $g, $x, $y if $self->debug;
103    
104          my $col = SDL::Color->new( -r => $r, -g => $g, -b => $b );          my $col = SDL::Color->new( -r => $r, -g => $g, -b => $b );
105          $self->app->pixel( $x, $y, $col );          $self->app->pixel( $x, $y, $col );
# Line 150  sub sync { Line 121  sub sync {
121          $app->sync;          $app->sync;
122  }  }
123    
124    =head2 render_vram
125    
126    Render one frame of video ram
127    
128      $self->render_vram;
129    
130    =cut
131    
132    sub render_vram {
133            my $self = shift;
134    
135            confess "please implement $self::render_vram";
136    }
137    
138    
139    =head2 render_frame
140    
141    Render one frame of video ram
142    
143      $self->render_frame( $vram_sdl_surface );
144    
145    =cut
146    
147    sub render_frame {
148            my $self = shift;
149    
150            my $vram = shift;
151            confess "need SDL::Surface as argument" unless ref($vram) eq 'SDL::Surface';
152    
153            $vram->display_format;
154    
155            my $scale = $self->scale || confess "no scale?";
156    
157            my $rect        = SDL::Rect->new( -x => 0, -y => 0, -width => 256 * $scale, -height => 256 * $scale );
158            my $rect_screen = SDL::Rect->new( -x => 0, -y => 0, -width => 256 * $scale, -height => 256 * $scale );
159    
160            if ( $scale > 1 ) {
161                    use SDL::Tool::Graphic;
162                    # last parametar is anti-alias
163                    my $zoomed = SDL::Tool::Graphic->zoom( $vram, $self->scale, $self->scale, 1 );
164                    $zoomed->blit( $rect, $app, $rect_screen );
165            } else {
166                    $vram->blit( $rect, $app, $rect_screen );
167            }
168    
169            $app->sync;
170    }
171    
172    
173    =head2 render_mem
174    
175      $self->render_mem( @mem );
176    
177    =cut
178    
179    sub render_mem {
180            my $self = shift;
181    
182            return unless $self->show_mem;
183    
184            my $pixels = pack("C*", @_);
185    
186            my $vram = SDL::Surface->new(
187                    -width => 256,
188                    -height => 256,
189                    -depth => 8,    # 1 bit per pixel
190                    -pitch => 256,  # bytes per line
191                    -from => $pixels,
192                    -Rmask => 0xffff00ff,
193                    -Gmask => 0xffff00ff,
194                    -Bmask => 0xffff00ff,
195            );
196    
197            $vram->display_format;
198    
199            my $rect     = SDL::Rect->new( -x => 0, -y => 0, -width => 256, -height => 256 );
200            my $rect_mem = SDL::Rect->new( -x => 256 * $self->scale, -y => 0, -width => 256, -height => 256 );
201    
202            $vram->blit( $rect, $app, $rect_mem );
203    
204            $app->sync;
205    }
206    
207    =head2 key_pressed
208    
209    Check SDL event loop if there are any pending keys
210    
211      my $key = $self->key_pressed;
212    
213      if ( $self->key_pressed( 1 ) ) {
214            # just to check other events, don't process
215            # key
216      }
217    
218    =cut
219    
220    my $pending_key;
221    my $run_for = 2000;
222    
223    my $key_down;
224    
225    sub key_down {
226            my $self = shift;
227            my $key = shift;
228            warn "key_down($key) = ",$key_down->{$key}, "\n" if $self->debug;
229            return $key_down->{$key};
230    }
231    
232    sub key_pressed {
233            my $self = shift;
234    
235            # don't take key, just pull event
236            my $just_checking = shift || 0;
237    
238            my $event = $self->event || confess "no event?";
239    
240            if ( ! $event->poll ) {
241                    if ( my $h = $self->session_event('key_pressed') ) {
242                            my ( $key, $state ) = %$h;
243                            if ( $state ) {
244                                    $pending_key = $key;
245                                    $key_down->{$key}++;
246                            } else {
247                                    undef $pending_key;
248                                    $key_down->{$key} = 0;
249                            }
250                    }
251                    return $pending_key;
252            }
253    
254            my $type = $event->type();
255    
256            exit if ($type == SDL_QUIT);
257    
258            my $k = $pending_key;
259    
260            if ($type == SDL_KEYDOWN) {
261                    $k = $event->key_name();
262                    $key_down->{$k}++;
263                    if ( $k eq 'escape' ) {
264                            $run_for = $self->cli;
265                            warn "will check event loop every $run_for cycles\n";
266                            $pending_key = '~';
267                    } else {
268                            warn "SDL_KEYDOWN ($type) = '$k'", $just_checking ? ' fake' : '', "\n";
269                            $pending_key = $k;
270                            $self->record_session('key_pressed', { $k => 1 });
271                    }
272            } elsif ( $type == SDL_KEYUP ) {
273                    my $up = $event->key_name();
274                    warn "SDL_KEYUP ($type) = '$up'", $just_checking ? ' fake' : '', "\n";
275                    $self->record_session('key_pressed', { $up => 0 });
276                    $key_down->{$up} = 0;
277                    undef $pending_key;
278            }
279    
280            warn "key_pressed = $pending_key\n" if ( $pending_key );
281    
282            return $pending_key;
283    }
284    
285    =head2 loop
286    
287    Implement CPU run for C<$run_run> cycles inside SDL event loop
288    
289      $self->loop( sub {
290            my $run_for = shift;
291            CPU::exec( $run_for );
292            $self->render_vram;
293      } );
294    
295    =cut
296    
297    sub loop {
298            my $self = shift;
299            my $exec = shift;
300    
301            confess "need coderef as argument" unless ref($exec) eq 'CODE';
302            my $event = SDL::Event->new();
303    
304            while ( 1 ) {
305                    $self->key_pressed( 1 );
306                    $exec->($run_for);
307            }
308    }
309    
310    =head1 SEE ALSO
311    
312    L<Orao> is sample implementation using this module
313    
314    =head1 AUTHOR
315    
316    Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>
317    
318    =head1 COPYRIGHT & LICENSE
319    
320    Copyright 2007 Dobrica Pavlinusic, All Rights Reserved.
321    
322    This program is free software; you can redistribute it and/or modify it
323    under the same terms as Perl itself.
324    
325    =cut
326    
327  1;  1;
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