1 |
package Screen; |
2 |
|
3 |
# Dobrica Pavlinusic, <dpavlin@rot13.org> 07/30/07 17:58:55 CEST |
4 |
|
5 |
use strict; |
6 |
use warnings; |
7 |
|
8 |
use SDL::App; |
9 |
use SDL::Rect; |
10 |
use SDL::Color; |
11 |
use SDL::Constants; |
12 |
|
13 |
use Carp qw/confess/; |
14 |
use Data::Dump qw/dump/; |
15 |
|
16 |
use base qw(Class::Accessor Prefs); |
17 |
__PACKAGE__->mk_accessors(qw(app)); |
18 |
|
19 |
=head1 NAME |
20 |
|
21 |
Screen - simulated 256*256 pixels monochrome screen using SDL |
22 |
|
23 |
=head2 open_screen |
24 |
|
25 |
Open simulated screen |
26 |
|
27 |
=cut |
28 |
|
29 |
our $app; |
30 |
|
31 |
sub open_screen { |
32 |
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( |
42 |
-width => 256 * $self->scale + ( $self->show_mem ? 256 : 0 ), |
43 |
-height => 256 * $self->scale, |
44 |
-depth => 16, |
45 |
); |
46 |
#$app->grab_input( SDL_GRAB_QUERY ); |
47 |
$app->grab_input( SDL_GRAB_OFF ); |
48 |
|
49 |
warn "# created SDL::App\n"; |
50 |
$self->app( $app ); |
51 |
} |
52 |
|
53 |
my $white = SDL::Color->new( -r => 0xff, -g => 0xff, -b => 0xff ); |
54 |
my $black = SDL::Color->new( -r => 0x80, -g => 0x80, -b => 0x80 ); |
55 |
|
56 |
my $red = SDL::Color->new( -r => 0xff, -g => 0x00, -b => 0x00 ); |
57 |
my $green = SDL::Color->new( -r => 0x00, -g => 0xff, -b => 0x00 ); |
58 |
my $blue = SDL::Color->new( -r => 0x00, -g => 0x00, -b => 0xff ); |
59 |
|
60 |
=head2 p |
61 |
|
62 |
$screen->p( $x, $y, 1 ); |
63 |
|
64 |
=cut |
65 |
|
66 |
sub p { |
67 |
my $self = shift; |
68 |
|
69 |
my ($x,$y,$w) = (@_); |
70 |
|
71 |
warn "p($x,$y,$w)\n" if $self->debug; |
72 |
|
73 |
my $scale = $self->scale; |
74 |
my $rect = SDL::Rect->new( |
75 |
-height => $scale, |
76 |
-width => $scale, |
77 |
-x => $x * $scale, |
78 |
-y => $y * $scale, |
79 |
); |
80 |
|
81 |
$app->fill( $rect, $w ? $white : $black ); |
82 |
$app->update( $rect ); |
83 |
} |
84 |
|
85 |
=head2 mem_xy |
86 |
|
87 |
Helper to return x and y coordinates in memory map |
88 |
|
89 |
my ( $x,$y ) = $screen->mem_xy( $address ); |
90 |
|
91 |
=cut |
92 |
|
93 |
sub mem_xy { |
94 |
my $self = shift; |
95 |
my $offset = shift; |
96 |
my $x = $offset & 0xff; |
97 |
$x += 256 * $self->scale; |
98 |
my $y = $offset >> 8; |
99 |
return ($x,$y); |
100 |
} |
101 |
|
102 |
=head2 vram |
103 |
|
104 |
Push byte to video memory and draw it |
105 |
|
106 |
$screen->vram( $offset, $byte ); |
107 |
|
108 |
=cut |
109 |
|
110 |
my $_vram_counter; |
111 |
|
112 |
sub vram { |
113 |
my ( $self, $offset, $byte ) = @_; |
114 |
my $x = ( $offset % 32 ) << 3; |
115 |
my $y = $offset >> 5; |
116 |
my $mask = 1; |
117 |
my $scale = $self->scale; |
118 |
|
119 |
printf "## vram %04x %02x*%02x %02x\n", $offset, $x, $y, $byte if $self->trace; |
120 |
|
121 |
foreach ( 0 .. 7 ) { |
122 |
my $on = $byte & $mask; |
123 |
if ( $scale == 1 ) { |
124 |
$app->pixel( $x + $_, $y, $on ? $white : $black ); |
125 |
} else { |
126 |
$self->p($x + $_, $y, $on ); |
127 |
} |
128 |
$mask = $mask << 1; |
129 |
} |
130 |
|
131 |
$app->sync if ( $_vram_counter++ % 10 == 0 ); |
132 |
} |
133 |
|
134 |
=head2 mmap_pixel |
135 |
|
136 |
Draw pixel in memory map |
137 |
|
138 |
$self->mmap_pixel( $addr, $r, $g, $b ); |
139 |
|
140 |
=cut |
141 |
|
142 |
# keep accesses to memory |
143 |
my $_mem_stat; |
144 |
|
145 |
sub mmap_pixel { |
146 |
my ( $self, $addr, $r, $g, $b ) = @_; |
147 |
return unless $self->show_mem && $self->app; |
148 |
|
149 |
my ( $x, $y ) = $self->mem_xy( $addr ); |
150 |
warn sprintf "## mem %04x %02x %02x %02d*%02d\n", $addr, $r, $g, $x, $y if $self->debug; |
151 |
|
152 |
my $col = SDL::Color->new( -r => $r, -g => $g, -b => $b ); |
153 |
$self->app->pixel( $x, $y, $col ); |
154 |
|
155 |
$_mem_stat++; |
156 |
if ( $_mem_stat % 1000 == 0 ) { |
157 |
$self->app->sync; |
158 |
} |
159 |
} |
160 |
|
161 |
|
162 |
=head2 sync |
163 |
|
164 |
$self->sync; |
165 |
|
166 |
=cut |
167 |
|
168 |
sub sync { |
169 |
$app->sync; |
170 |
} |
171 |
|
172 |
=head2 render |
173 |
|
174 |
$self->render( @video_memory ); |
175 |
|
176 |
=cut |
177 |
|
178 |
sub render { |
179 |
my $self = shift; |
180 |
|
181 |
die "this function isn't supported if scale isn't 1" unless $self->scale == 1; |
182 |
|
183 |
my $pixels = pack("C*", @_); |
184 |
|
185 |
my $vram = SDL::Surface->new( |
186 |
-width => 256, |
187 |
-height => 256, |
188 |
-depth => 1, # 1 bit per pixel |
189 |
-pitch => 32, # bytes per line |
190 |
-from => $pixels, |
191 |
); |
192 |
$vram->set_colors( 0, $black, $white, $red ); |
193 |
$vram->display_format; |
194 |
|
195 |
my $rect = SDL::Rect->new( -x => 0, -y => 0, -width => 256, -height => 256 ); |
196 |
$vram->blit( $rect, $app, $rect ); |
197 |
|
198 |
$app->sync; |
199 |
} |
200 |
|
201 |
=head1 SEE ALSO |
202 |
|
203 |
L<Orao> is sample implementation using this module |
204 |
|
205 |
=head1 AUTHOR |
206 |
|
207 |
Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |
208 |
|
209 |
=head1 COPYRIGHT & LICENSE |
210 |
|
211 |
Copyright 2007 Dobrica Pavlinusic, All Rights Reserved. |
212 |
|
213 |
This program is free software; you can redistribute it and/or modify it |
214 |
under the same terms as Perl itself. |
215 |
|
216 |
=cut |
217 |
1; |