/[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 31 by dpavlin, Mon Jul 30 18:07:29 2007 UTC Screen.pm revision 165 by dpavlin, Mon Aug 6 07:04:40 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 Exporter 'import';
17    our @EXPORT = qw'$white $black @flip';
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    =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 key_down
32    
33      $self->key_down( 'a' );
34    
35    =cut
36    
37    sub key_down {}
38    
39    =head2 key_up
40    
41      $self->key_up( 'a' );
42    
43    =cut
44    
45    sub key_up {}
46    
47    
48    =head1 Architecture independent
49    
50    You don't need to override any of following function in your architecture,
51    but you might want to call them.
52    
53  =head2 open_screen  =head2 open_screen
54    
# Line 23  our $app; Line 61  our $app;
61  sub open_screen {  sub open_screen {
62          my $self = shift;          my $self = shift;
63    
64            $self->prefs;
65    
66          if ( ! $self->scale ) {          if ( ! $self->scale ) {
67                  $self->scale( 1 );                  $self->scale( 1 );
68                  warn "using default unscaled display\n";                  warn "using default unscaled display\n";
# Line 32  sub open_screen { Line 72  sub open_screen {
72                  -width  => 256 * $self->scale + ( $self->show_mem ? 256 : 0 ),                  -width  => 256 * $self->scale + ( $self->show_mem ? 256 : 0 ),
73                  -height => 256 * $self->scale,                  -height => 256 * $self->scale,
74                  -depth  => 16,                  -depth  => 16,
75                    -flags=>SDL_DOUBLEBUF | SDL_HWSURFACE | SDL_HWACCEL,
76          );          );
77          #$app->grab_input( 0 );          #$app->grab_input( SDL_GRAB_QUERY );
78            $app->grab_input( SDL_GRAB_OFF );
79            $app->title( ref($self) );
80    
81            $self->app( $app );
82    
83            my $event = SDL::Event->new();
84            $self->event( $event );
85    
86          warn "# created SDL::App\n";          warn "# created SDL::App\n";
87  }  }
88    
89  my $white       = SDL::Color->new( -r => 0xff, -g => 0xff, -b => 0xff );  our $white      = SDL::Color->new( -r => 0xff, -g => 0xff, -b => 0xff );
90  my $black       = SDL::Color->new( -r => 0x80, -g => 0x80, -b => 0x80 );  our $black      = SDL::Color->new( -r => 0x80, -g => 0x80, -b => 0x80 );
91    
92  my $red         = SDL::Color->new( -r => 0xff, -g => 0x00, -b => 0x00 );  my $red         = SDL::Color->new( -r => 0xff, -g => 0x00, -b => 0x00 );
93  my $green       = SDL::Color->new( -r => 0x00, -g => 0xff, -b => 0x00 );  my $green       = SDL::Color->new( -r => 0x00, -g => 0xff, -b => 0x00 );
94  my $blue        = SDL::Color->new( -r => 0x00, -g => 0x00, -b => 0xff );  my $blue        = SDL::Color->new( -r => 0x00, -g => 0x00, -b => 0xff );
95    
96  =head2 p  =head2 mem_xy
97    
98    Helper to return x and y coordinates in memory map
99    
100      my ( $x,$y ) = $screen->mem_xy( $address );
101    
102    =cut
103    
104    sub mem_xy {
105            my $self = shift;
106            my $offset = shift;
107            my $x = $offset & 0xff;
108            $x += 256 * $self->scale;
109            my $y = $offset >> 8;
110            return ($x,$y);
111    }
112    
113    =head2 mmap_pixel
114    
115    Draw pixel in memory map
116    
117      $self->mmap_pixel( $addr, $r, $g, $b );
118    
119    =cut
120    
121    # keep accesses to memory
122    my $_mem_stat;
123    
124    sub mmap_pixel {
125            my ( $self, $addr, $r, $g, $b ) = @_;
126            return unless $self->show_mem && $self->app;
127    
128            my ( $x, $y ) = $self->mem_xy( $addr );
129            warn sprintf "## mem %04x %02x %02x %02d*%02d\n", $addr, $r, $g, $x, $y if $self->debug;
130    
131            my $col = SDL::Color->new( -r => $r, -g => $g, -b => $b );
132            $self->app->pixel( $x, $y, $col );
133    
134            $_mem_stat++;
135            if ( $_mem_stat % 1000 == 0 ) {
136                    $self->app->sync;
137            }
138    }
139    
140    
141    =head2 sync
142    
143      $self->sync;
144    
145    =cut
146    
147    sub sync {
148            $app->sync;
149    }
150    
151    =head2 render_vram
152    
153    Render one frame of video ram
154    
155      $self->render_vram;
156    
157    =cut
158    
159    sub render_vram {
160            my $self = shift;
161    
162            confess "please implement $self::render_vram";
163    }
164    
165    
166    =head2 render_frame
167    
168    Render one frame of video ram
169    
170      $self->render_frame( $vram_sdl_surface );
171    
172    =cut
173    
174    sub render_frame {
175            my $self = shift;
176    
177            my $vram = shift;
178            confess "need SDL::Surface as argument" unless ref($vram) eq 'SDL::Surface';
179    
180            $vram->display_format;
181    
182            my $scale = $self->scale || confess "no scale?";
183    
184            my $rect        = SDL::Rect->new( -x => 0, -y => 0, -width => 256 * $scale, -height => 256 * $scale );
185            my $rect_screen = SDL::Rect->new( -x => 0, -y => 0, -width => 256 * $scale, -height => 256 * $scale );
186    
187            if ( $scale > 1 ) {
188                    use SDL::Tool::Graphic;
189                    # last parametar is anti-alias
190                    my $zoomed = SDL::Tool::Graphic->zoom( $vram, $self->scale, $self->scale, 1 );
191                    $zoomed->blit( $rect, $app, $rect_screen );
192            } else {
193                    $vram->blit( $rect, $app, $rect_screen );
194            }
195    
196            $app->sync;
197    }
198    
199   $screen->p( $x, $y, 1 );  
200    =head2 render_mem
201    
202      $self->render_mem( @mem );
203    
204  =cut  =cut
205    
206  sub p {  sub render_mem {
207          my $self = shift;          my $self = shift;
208    
209          my ($x,$y,$w) = (@_);          return unless $self->show_mem;
210    
211          warn "p($x,$y,$w)\n" if $self->debug;          my $pixels = pack("C*", @_);
212    
213          my $scale = $self->scale;          my $vram = SDL::Surface->new(
214          my $rect = SDL::Rect->new(                  -width => 256,
215                  -height => $scale,                  -height => 256,
216                  -width  => $scale,                  -depth => 8,    # 1 bit per pixel
217                  -x      => $x * $scale,                  -pitch => 256,  # bytes per line
218                  -y      => $y * $scale,                  -from => $pixels,
219                    -Rmask => 0xffff00ff,
220                    -Gmask => 0xffff00ff,
221                    -Bmask => 0xffff00ff,
222          );          );
223    
224          $app->fill( $rect, $w ? $white : $black );          $vram->display_format;
225          $app->update( $rect );  
226            my $rect     = SDL::Rect->new( -x => 0, -y => 0, -width => 256, -height => 256 );
227            my $rect_mem = SDL::Rect->new( -x => 256 * $self->scale, -y => 0, -width => 256, -height => 256 );
228    
229            $vram->blit( $rect, $app, $rect_mem );
230    
231            $app->sync;
232  }  }
233    
234  =head2 mem_xy  =head2 key_pressed
235    
236  Helper to return x and y coordinates in memory map  Check SDL event loop if there are any pending keys
237    
238    my ( $x,$y ) = $screen->mem_xy( $address );    my $key = $self->key_pressed;
239    
240      if ( $self->key_pressed( 1 ) ) {
241            # just to check other events, don't process
242            # key
243      }
244    
245  =cut  =cut
246    
247  sub mem_xy {  my $pending_key;
248    my $run_for = 2000;
249    
250    sub key_pressed {
251          my $self = shift;          my $self = shift;
252          my $offset = shift;  
253          my $x = $offset & 0xff;          # don't take key, just pull event
254          $x += 256 * $self->scale;          my $just_checking = shift || 0;
255          my $y = $offset >> 8;  
256          return ($x,$y);          my $event = $self->event || confess "no event?";
257    
258            if ( ! $event->poll ) {
259                    return $pending_key unless $self->can('session_event');
260                    if ( my $h = $self->session_event('key_pressed') ) {
261                            my ( $key, $state ) = %$h;
262                            if ( $state ) {
263                                    $pending_key = $key;
264                                    $self->key_down( $key );
265                            } else {
266                                    undef $pending_key;
267                                    $self->key_up( $key );
268                            }
269                    }
270                    return $pending_key;
271            }
272    
273            my $type = $event->type();
274    
275            exit if ($type == SDL_QUIT);
276    
277            my $k = $pending_key;
278    
279            if ($type == SDL_KEYDOWN) {
280                    $k = $event->key_name();
281                    if ( $k eq 'escape' ) {
282                            $run_for = $self->cli;
283                            warn "will check event loop every $run_for cycles\n";
284                            $pending_key = '~';
285                    } else {
286                            warn "SDL_KEYDOWN ($type) = '$k'", $just_checking ? ' fake' : '', "\n";
287                            $pending_key = $k;
288                            $self->key_down( $k );
289                            $self->record_session('key_pressed', { $k => 1 });
290                    }
291            } elsif ( $type == SDL_KEYUP ) {
292                    my $up = $event->key_name();
293                    warn "SDL_KEYUP ($type) = '$up'", $just_checking ? ' fake' : '', "\n";
294                    $self->key_up( $up );
295                    $self->record_session('key_pressed', { $up => 0 });
296                    undef $pending_key;
297            }
298    
299            warn "key_pressed = $pending_key\n" if ( $pending_key );
300    
301            return $pending_key;
302  }  }
303    
304  =head2 vram  =head2 loop
305    
306  Push byte to video memory and draw it  Implement CPU run for C<$run_run> cycles inside SDL event loop
307    
308    $screen->vram( $offset, $byte );    $self->loop( sub {
309            my $run_for = shift;
310            CPU::exec( $run_for );
311            $self->render_vram;
312      } );
313    
314  =cut  =cut
315    
316  sub vram {  sub loop {
317          my ( $self, $offset, $byte ) = @_;          my $self = shift;
318          my $x = ( $offset % 32 ) << 3;          my $exec = shift;
         my $y = $offset >> 5;  
         my $mask = 1;  
319    
320          printf "## vram %04x %02x*%02x %02x\n", $offset, $x, $y, $byte if $self->trace;          confess "need coderef as argument" unless ref($exec) eq 'CODE';
321            my $event = SDL::Event->new();
322    
323          foreach ( 0 .. 7 ) {          while ( 1 ) {
324                  p($x + $_, $y, $byte & $mask );                  $self->key_pressed( 1 );
325                  $mask = $mask << 1;                  $exec->($run_for);
326          }          }
327  }  }
328    
329    # helper array to flip bytes for display
330    our @flip;
331    
332    foreach my $i ( 0 .. 255 ) {
333            my $t = 0;
334            $i & 0b00000001 and $t = $t | 0b10000000;
335            $i & 0b00000010 and $t = $t | 0b01000000;
336            $i & 0b00000100 and $t = $t | 0b00100000;
337            $i & 0b00001000 and $t = $t | 0b00010000;
338            $i & 0b00010000 and $t = $t | 0b00001000;
339            $i & 0b00100000 and $t = $t | 0b00000100;
340            $i & 0b01000000 and $t = $t | 0b00000010;
341            $i & 0b10000000 and $t = $t | 0b00000001;
342            #warn "$i = $t\n";
343            $flip[$i] = $t;
344    }
345    
346    =head1 SEE ALSO
347    
348    L<Orao> is sample implementation using this module
349    
350    =head1 AUTHOR
351    
352    Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >>
353    
354    =head1 COPYRIGHT & LICENSE
355    
356    Copyright 2007 Dobrica Pavlinusic, All Rights Reserved.
357    
358    This program is free software; you can redistribute it and/or modify it
359    under the same terms as Perl itself.
360    
361    =cut
362    
363    1;
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