| 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 Exporter 'import'; |
| 17 |
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 |
| 27 |
|
| 28 |
Open simulated screen |
| 29 |
|
| 30 |
=cut |
| 31 |
|
| 32 |
our $app; |
| 33 |
|
| 34 |
sub open_screen { |
| 35 |
my $self = shift; |
| 36 |
|
| 37 |
$self->prefs; |
| 38 |
|
| 39 |
if ( ! $self->scale ) { |
| 40 |
$self->scale( 1 ); |
| 41 |
warn "using default unscaled display\n"; |
| 42 |
} |
| 43 |
|
| 44 |
$app = SDL::App->new( |
| 45 |
-width => 256 * $self->scale + ( $self->show_mem ? 256 : 0 ), |
| 46 |
-height => 256 * $self->scale, |
| 47 |
-depth => 16, |
| 48 |
-flags=>SDL_DOUBLEBUF | SDL_HWSURFACE | SDL_HWACCEL, |
| 49 |
); |
| 50 |
#$app->grab_input( SDL_GRAB_QUERY ); |
| 51 |
$app->grab_input( SDL_GRAB_OFF ); |
| 52 |
$app->title( ref($self) . ' ' . $self::VERSION ); |
| 53 |
|
| 54 |
$self->app( $app ); |
| 55 |
|
| 56 |
my $event = SDL::Event->new(); |
| 57 |
$self->event( $event ); |
| 58 |
|
| 59 |
warn "# created SDL::App\n"; |
| 60 |
} |
| 61 |
|
| 62 |
our $white = SDL::Color->new( -r => 0xff, -g => 0xff, -b => 0xff ); |
| 63 |
our $black = SDL::Color->new( -r => 0x80, -g => 0x80, -b => 0x80 ); |
| 64 |
|
| 65 |
my $red = SDL::Color->new( -r => 0xff, -g => 0x00, -b => 0x00 ); |
| 66 |
my $green = SDL::Color->new( -r => 0x00, -g => 0xff, -b => 0x00 ); |
| 67 |
my $blue = SDL::Color->new( -r => 0x00, -g => 0x00, -b => 0xff ); |
| 68 |
|
| 69 |
=head2 mem_xy |
| 70 |
|
| 71 |
Helper to return x and y coordinates in memory map |
| 72 |
|
| 73 |
my ( $x,$y ) = $screen->mem_xy( $address ); |
| 74 |
|
| 75 |
=cut |
| 76 |
|
| 77 |
sub mem_xy { |
| 78 |
my $self = shift; |
| 79 |
my $offset = shift; |
| 80 |
my $x = $offset & 0xff; |
| 81 |
$x += 256 * $self->scale; |
| 82 |
my $y = $offset >> 8; |
| 83 |
return ($x,$y); |
| 84 |
} |
| 85 |
|
| 86 |
=head2 mmap_pixel |
| 87 |
|
| 88 |
Draw pixel in memory map |
| 89 |
|
| 90 |
$self->mmap_pixel( $addr, $r, $g, $b ); |
| 91 |
|
| 92 |
=cut |
| 93 |
|
| 94 |
# keep accesses to memory |
| 95 |
my $_mem_stat; |
| 96 |
|
| 97 |
sub mmap_pixel { |
| 98 |
my ( $self, $addr, $r, $g, $b ) = @_; |
| 99 |
return unless $self->show_mem && $self->app; |
| 100 |
|
| 101 |
my ( $x, $y ) = $self->mem_xy( $addr ); |
| 102 |
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 ); |
| 105 |
$self->app->pixel( $x, $y, $col ); |
| 106 |
|
| 107 |
$_mem_stat++; |
| 108 |
if ( $_mem_stat % 1000 == 0 ) { |
| 109 |
$self->app->sync; |
| 110 |
} |
| 111 |
} |
| 112 |
|
| 113 |
|
| 114 |
=head2 sync |
| 115 |
|
| 116 |
$self->sync; |
| 117 |
|
| 118 |
=cut |
| 119 |
|
| 120 |
sub sync { |
| 121 |
$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 |
$event->poll || return $pending_key; |
| 241 |
|
| 242 |
my $type = $event->type(); |
| 243 |
|
| 244 |
exit if ($type == SDL_QUIT); |
| 245 |
|
| 246 |
my $k = $pending_key; |
| 247 |
|
| 248 |
if ($type == SDL_KEYDOWN) { |
| 249 |
$k = $event->key_name(); |
| 250 |
$key_down->{$k}++; |
| 251 |
if ( $k eq 'escape' ) { |
| 252 |
$run_for = $self->cli; |
| 253 |
warn "will check event loop every $run_for cycles\n"; |
| 254 |
$pending_key = '~'; |
| 255 |
} else { |
| 256 |
warn "SDL_KEYDOWN ($type) = '$k'", $just_checking ? ' fake' : '', "\n"; |
| 257 |
$pending_key = $k; |
| 258 |
} |
| 259 |
} elsif ( $type == SDL_KEYUP ) { |
| 260 |
my $up = $event->key_name(); |
| 261 |
$key_down->{$up} = 0; |
| 262 |
warn "SDL_KEYUP ($type) = '$up'", $just_checking ? ' fake' : '', "\n"; |
| 263 |
undef $pending_key; |
| 264 |
} |
| 265 |
|
| 266 |
if ( $pending_key ) { |
| 267 |
warn "key_pressed = $pending_key\n"; |
| 268 |
$self->record_session('key_pressed', $pending_key); |
| 269 |
} |
| 270 |
|
| 271 |
return $pending_key; |
| 272 |
} |
| 273 |
|
| 274 |
=head2 loop |
| 275 |
|
| 276 |
Implement CPU run for C<$run_run> cycles inside SDL event loop |
| 277 |
|
| 278 |
$self->loop( sub { |
| 279 |
my $run_for = shift; |
| 280 |
CPU::exec( $run_for ); |
| 281 |
$self->render_vram; |
| 282 |
} ); |
| 283 |
|
| 284 |
=cut |
| 285 |
|
| 286 |
sub loop { |
| 287 |
my $self = shift; |
| 288 |
my $exec = shift; |
| 289 |
|
| 290 |
confess "need coderef as argument" unless ref($exec) eq 'CODE'; |
| 291 |
my $event = SDL::Event->new(); |
| 292 |
|
| 293 |
while ( 1 ) { |
| 294 |
$self->key_pressed( 1 ); |
| 295 |
$exec->($run_for); |
| 296 |
} |
| 297 |
} |
| 298 |
|
| 299 |
=head1 SEE ALSO |
| 300 |
|
| 301 |
L<Orao> is sample implementation using this module |
| 302 |
|
| 303 |
=head1 AUTHOR |
| 304 |
|
| 305 |
Dobrica Pavlinusic, C<< <dpavlin@rot13.org> >> |
| 306 |
|
| 307 |
=head1 COPYRIGHT & LICENSE |
| 308 |
|
| 309 |
Copyright 2007 Dobrica Pavlinusic, All Rights Reserved. |
| 310 |
|
| 311 |
This program is free software; you can redistribute it and/or modify it |
| 312 |
under the same terms as Perl itself. |
| 313 |
|
| 314 |
=cut |
| 315 |
1; |
Parent Directory
| 
Revision Log