/[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 101 by dpavlin, Thu Aug 2 17:15:07 2007 UTC Screen.pm revision 190 by dpavlin, Sun Sep 30 20:13:10 2007 UTC
# Line 13  use SDL::Constants; Line 13  use SDL::Constants;
13  use Carp qw/confess/;  use Carp qw/confess/;
14  use Data::Dump qw/dump/;  use Data::Dump qw/dump/;
15    
16    use Exporter 'import';
17    our @EXPORT = qw'$white $black @flip';
18    
19  use base qw(Class::Accessor Prefs);  use base qw(Class::Accessor Prefs);
20  __PACKAGE__->mk_accessors(qw(app event));  __PACKAGE__->mk_accessors(qw(app event screen_width screen_height window_width window_height));
21    
22  =head1 NAME  =head1 NAME
23    
24  Screen - simulated 256*256 pixels monochrome screen using SDL  Screen - simulated monochrome screen using SDL
25    
26    =head1 Architecture dependent
27    
28    You may override following methods if you want to implement keyboard on each
29    keypress event. Alternative is to use <read> hook and trap memory access.
30    
31    =head2 screen_width
32    
33    Width of emulated screen (256 by default)
34    
35    =head2 screen_height
36    
37    Height of emulated screen (256 by default)
38    
39    =head2 key_down
40    
41      $self->key_down( 'a' );
42    
43    =cut
44    
45    sub key_down {}
46    
47    =head2 key_up
48    
49      $self->key_up( 'a' );
50    
51    =cut
52    
53    sub key_up {}
54    
55    
56    =head1 Architecture independent
57    
58    You don't need to override any of following function in your architecture,
59    but you might want to call them.
60    
61  =head2 open_screen  =head2 open_screen
62    
# Line 38  sub open_screen { Line 76  sub open_screen {
76                  warn "using default unscaled display\n";                  warn "using default unscaled display\n";
77          }          }
78    
79            $self->screen_width( 256 ) unless defined $self->screen_width;
80            $self->screen_height( 256 ) unless defined $self->screen_height;
81    
82            my $w = $self->screen_width * $self->scale + ( $self->show_mem ? 256 : 0 );
83            $self->window_width( $w );
84    
85            my $h = $self->screen_height;
86            # expand screen size to show whole 64k 256*256 memory map
87            $h = 256 if $self->show_mem && $h < 256;
88            $h *= $self->scale;
89            $self->window_height( $h );
90    
91          $app = SDL::App->new(          $app = SDL::App->new(
92                  -width  => 256 * $self->scale + ( $self->show_mem ? 256 : 0 ),                  -width  => $w,
93                  -height => 256 * $self->scale,                  -height => $h,
94                  -depth  => 16,                  -depth  => 16,
95                    -flags=>SDL_DOUBLEBUF | SDL_HWSURFACE | SDL_HWACCEL,
96          );          );
97          #$app->grab_input( SDL_GRAB_QUERY );          #$app->grab_input( SDL_GRAB_QUERY );
98          $app->grab_input( SDL_GRAB_OFF );          $app->grab_input( SDL_GRAB_OFF );
99            $app->title( ref($self) );
100    
101          $self->app( $app );          $self->app( $app );
102    
103          my $event = SDL::Event->new();          my $event = SDL::Event->new();
104          $self->event( $event );          $self->event( $event );
105    
106          warn "# created SDL::App\n";          warn "# created SDL::App with screen ", $self->screen_width, "x", $self->screen_height, " in window ",
107                    $self->window_width, "x", $self->window_height, "\n";
108  }  }
109    
110  my $white       = SDL::Color->new( -r => 0xff, -g => 0xff, -b => 0xff );  our $white      = SDL::Color->new( -r => 0xff, -g => 0xff, -b => 0xff );
111  my $black       = SDL::Color->new( -r => 0x80, -g => 0x80, -b => 0x80 );  our $black      = SDL::Color->new( -r => 0x80, -g => 0x80, -b => 0x80 );
112    
113  my $red         = SDL::Color->new( -r => 0xff, -g => 0x00, -b => 0x00 );  my $red         = SDL::Color->new( -r => 0xff, -g => 0x00, -b => 0x00 );
114  my $green       = SDL::Color->new( -r => 0x00, -g => 0xff, -b => 0x00 );  my $green       = SDL::Color->new( -r => 0x00, -g => 0xff, -b => 0x00 );
115  my $blue        = SDL::Color->new( -r => 0x00, -g => 0x00, -b => 0xff );  my $blue        = SDL::Color->new( -r => 0x00, -g => 0x00, -b => 0xff );
116    
 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 );  
 }  
   
117  =head2 mem_xy  =head2 mem_xy
118    
119  Helper to return x and y coordinates in memory map  Helper to return x and y coordinates in memory map
# Line 101  sub mem_xy { Line 126  sub mem_xy {
126          my $self = shift;          my $self = shift;
127          my $offset = shift;          my $offset = shift;
128          my $x = $offset & 0xff;          my $x = $offset & 0xff;
129          $x += 256 * $self->scale;          $x += $self->screen_width * $self->scale;
130          my $y = $offset >> 8;          my $y = $offset >> 8;
131          return ($x,$y);          return ($x,$y);
132  }  }
133    
 =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 );  
 }  
   
134  =head2 mmap_pixel  =head2 mmap_pixel
135    
136  Draw pixel in memory map  Draw pixel in memory map
# Line 176  sub sync { Line 169  sub sync {
169          $app->sync;          $app->sync;
170  }  }
171    
172  =head2 render  =head2 render_vram
173    
174  Render one frame of video ram  Render one frame of video ram
175    
176    $self->render( @video_memory );    $self->render_vram;
177    
178  =cut  =cut
179    
180  sub render {  sub render_vram {
181          my $self = shift;          my $self = shift;
182    
183          die "this function isn't supported if scale isn't 1" unless $self->scale == 1;          confess "please implement $self::render_vram";
184    }
185    
         my $pixels = pack("C*", @_);  
186    
187          my $vram = SDL::Surface->new(  =head2 render_frame
188                  -width => 256,  
189                  -height => 256,  Render one frame of video ram
190                  -depth => 1,    # 1 bit per pixel  
191                  -pitch => 32,   # bytes per line    $self->render_frame( $vram_sdl_surface );
192                  -from => $pixels,  
193          );  =cut
194          $vram->set_colors( 0, $black, $white, $red );  
195    sub render_frame {
196            my $self = shift;
197    
198            my $vram = shift;
199            confess "need SDL::Surface as argument" unless ref($vram) eq 'SDL::Surface';
200    
201          $vram->display_format;          $vram->display_format;
202    
203          my $rect = SDL::Rect->new( -x => 0, -y => 0, -width => 256, -height => 256 );          my $scale = $self->scale || confess "no scale?";
204          $vram->blit( $rect, $app, $rect_screen );  
205            my $rect        = SDL::Rect->new( -x => 0, -y => 0, -width => $self->screen_width * $scale, -height => $self->screen_height * $scale );
206            my $rect_screen = SDL::Rect->new( -x => 0, -y => 0, -width => $self->screen_width * $scale, -height => $self->screen_height * $scale );
207    
208            if ( $scale > 1 ) {
209                    use SDL::Tool::Graphic;
210                    # last parametar is anti-alias
211                    my $zoomed = SDL::Tool::Graphic->zoom( $vram, $self->scale, $self->scale, 1 );
212                    $zoomed->blit( $rect, $app, $rect_screen );
213            } else {
214                    $vram->blit( $rect, $app, $rect_screen );
215            }
216    
217          $app->sync;          $app->sync;
218  }  }
219    
220    
221  =head2 render_mem  =head2 render_mem
222    
223    $self->render_mem( @ram );    $self->render_mem( @mem );
224    
225  =cut  =cut
226    
# Line 233  sub render_mem { Line 244  sub render_mem {
244    
245          $vram->display_format;          $vram->display_format;
246    
247          my $rect = SDL::Rect->new( -x => 0, -y => 0, -width => 256, -height => 256 );          my $rect     = SDL::Rect->new( -x => 0, -y => 0, -width => $self->screen_width, -height => $self->window_height );
248            my $rect_mem = SDL::Rect->new( -x => $self->screen_width * $self->scale, -y => 0, -width => 256, -height => 256 );
249    
250          $vram->blit( $rect, $app, $rect_mem );          $vram->blit( $rect, $app, $rect_mem );
251    
252          $app->sync;          $app->sync;
# Line 253  Check SDL event loop if there are any pe Line 266  Check SDL event loop if there are any pe
266  =cut  =cut
267    
268  my $pending_key;  my $pending_key;
269    my $key_active;
270  my $run_for = 2000;  my $run_for = 2000;
271    
272  sub key_pressed {  sub key_pressed {
# Line 263  sub key_pressed { Line 277  sub key_pressed {
277    
278          my $event = $self->event || confess "no event?";          my $event = $self->event || confess "no event?";
279    
280          $event->poll || return $pending_key;          if ( ! $event->poll ) {
281                    return $pending_key unless $self->can('session_event');
282                    if ( my $h = $self->session_event('key_pressed') ) {
283                            my ( $key, $state ) = %$h;
284                            if ( $state ) {
285                                    $pending_key = $key;
286                                    $self->key_down( $key );
287                                    $key_active->{$key} = 1;
288                            } else {
289                                    undef $pending_key;
290                                    $self->key_up( $key );
291                                    $key_active->{$key} = 0;
292                            }
293                    }
294                    return $pending_key;
295            }
296    
297          my $type = $event->type();          my $type = $event->type();
298    
# Line 280  sub key_pressed { Line 309  sub key_pressed {
309                  } else {                  } else {
310                          warn "SDL_KEYDOWN ($type) = '$k'", $just_checking ? ' fake' : '', "\n";                          warn "SDL_KEYDOWN ($type) = '$k'", $just_checking ? ' fake' : '', "\n";
311                          $pending_key = $k;                          $pending_key = $k;
312                            $self->key_down( $k );
313                            $key_active->{$k} = 1;
314                            $self->record_session('key_pressed', { $k => 1 });
315                  }                  }
316          } elsif ( $type == SDL_KEYUP ) {          } elsif ( $type == SDL_KEYUP ) {
317                  my $up = $event->key_name();                  my $up = $event->key_name();
318                  warn "SDL_KEYUP ($type) = '$up'", $just_checking ? ' fake' : '', "\n";                  warn "SDL_KEYUP ($type) = '$up'", $just_checking ? ' fake' : '', "\n";
319                    $self->key_up( $up );
320                    $key_active->{$up} = 0;
321                    $self->record_session('key_pressed', { $up => 0 });
322                  undef $pending_key;                  undef $pending_key;
323          }          }
324    
325          warn "key_pressed = $pending_key\n" if $pending_key;          warn "key_pressed = $pending_key\n" if ( $pending_key );
326    
327          return $pending_key;          return $pending_key;
328  }  }
329    
330    =head2 key_active
331    
332    Is key currently pressed on keyboard or in session?
333    
334      $self->key_active( 'left shift', 'right shift', 'a' );
335    
336    =cut
337    
338    sub key_active {
339            my $self = shift;
340            my @keys = @_;
341            confess "Regexp is no longer supported" if ref($_[0]) eq 'Regexp';
342    
343            my $active = 0;
344            foreach my $key ( @keys ) {
345                    $active++ if $key_active->{$key};
346            }
347    
348            warn "## key_active(",dump(@keys),") = $active\n" if $active;
349            return $active;
350    }
351    
352  =head2 loop  =head2 loop
353    
354  Implement SDL event loop  Implement CPU run for C<$run_run> cycles inside SDL event loop
355    
356      $self->loop( sub {
357            my $run_for = shift;
358            CPU::exec( $run_for );
359            $self->render_vram;
360      } );
361    
362  =cut  =cut
363    
364  sub loop {  sub loop {
365          my $self = shift;          my $self = shift;
366          my $event = SDL::Event->new();          my $exec = shift;
367    
368            confess "need coderef as argument" unless ref($exec) eq 'CODE';
369            my $event = SDL::Event->new();
370    
         MAIN_LOOP:  
371          while ( 1 ) {          while ( 1 ) {
372                  $self->key_pressed( 1 );                  $self->key_pressed( 1 );
373                  M6502::exec($run_for);                  $exec->($run_for);
374          }          }
375  }  }
376    
377    =head2 @flip
378    
379    Exported helper array used to flip bytes (from character roms for example)
380    
381      my $flipped = $flip[ $byte ];
382    
383    =cut
384    
385    our @flip;
386    
387    foreach my $i ( 0 .. 255 ) {
388            my $t = 0;
389            $i & 0b00000001 and $t = $t | 0b10000000;
390            $i & 0b00000010 and $t = $t | 0b01000000;
391            $i & 0b00000100 and $t = $t | 0b00100000;
392            $i & 0b00001000 and $t = $t | 0b00010000;
393            $i & 0b00010000 and $t = $t | 0b00001000;
394            $i & 0b00100000 and $t = $t | 0b00000100;
395            $i & 0b01000000 and $t = $t | 0b00000010;
396            $i & 0b10000000 and $t = $t | 0b00000001;
397            #warn "$i = $t\n";
398            $flip[$i] = $t;
399    }
400    
401  =head1 SEE ALSO  =head1 SEE ALSO
402    
403  L<Orao> is sample implementation using this module  L<Orao> is sample implementation using this module
# Line 326  This program is free software; you can r Line 414  This program is free software; you can r
414  under the same terms as Perl itself.  under the same terms as Perl itself.
415    
416  =cut  =cut
417    
418  1;  1;
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