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1 | #!/usr/bin/env perl |
2 | # |
3 | # Surface.pm |
4 | # |
5 | # Copyright (C) 2005 David J. Goehrig <dgoehrig@cpan.org> |
6 | # |
7 | # ------------------------------------------------------------------------------ |
8 | # |
9 | # This library is free software; you can redistribute it and/or |
10 | # modify it under the terms of the GNU Lesser General Public |
11 | # License as published by the Free Software Foundation; either |
12 | # version 2.1 of the License, or (at your option) any later version. |
8fde61e3 |
13 | # |
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14 | # This library is distributed in the hope that it will be useful, |
15 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
16 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
17 | # Lesser General Public License for more details. |
18 | # |
19 | # You should have received a copy of the GNU Lesser General Public |
20 | # License along with this library; if not, write to the Free Software |
21 | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
22 | # |
23 | # ------------------------------------------------------------------------------ |
24 | # |
25 | # Please feel free to send questions, suggestions or improvements to: |
8fde61e3 |
26 | # |
7b6a53a1 |
27 | # David J. Goehrig |
28 | # dgoehrig@cpan.org |
8fde61e3 |
29 | # |
8fde61e3 |
30 | |
31 | package SDL::Surface; |
32 | |
33 | use strict; |
084b921f |
34 | use warnings; |
35 | use Carp; |
8fde61e3 |
36 | use SDL; |
37 | use SDL::SFont; |
38 | use SDL::Color; |
39 | use SDL::Rect; |
40 | |
41 | sub new { |
42 | my $proto = shift; |
43 | my $class = ref($proto) || $proto; |
44 | my %options = @_; |
45 | my $self; |
46 | |
47 | verify (%options, qw/ -name -n -flags -fl -width -w -height -h -depth -d |
48 | -pitch -p -Rmask -r -Gmask -g -Bmask -b -Amask -a |
49 | -from -f /) if $SDL::DEBUG; |
50 | |
51 | if ( defined($options{-name}) && $options{-name} ne "" && exists $SDL::{IMGLoad} ) { |
52 | $self = \SDL::IMGLoad($options{-name}); |
53 | } else { |
54 | my $f = $options{-flags} || $options{-fl} || SDL::SDL_ANYFORMAT(); |
55 | my $w = $options{-width} || $options{-w} || 1; |
56 | my $h = $options{-height} || $options{-h} || 1; |
57 | my $d = $options{-depth} || $options{-d} || 8; |
58 | my $p = $options{-pitch} || $options{-p} || $w*$d; |
59 | my $r = $options{-Rmask} || $options{-r} |
60 | || ( SDL::BigEndian() ? 0xff000000 : 0x000000ff ); |
61 | my $g = $options{-Gmask} || $options{-g} |
62 | || ( SDL::BigEndian() ? 0x00ff0000 : 0x0000ff00 ); |
63 | my $b = $options{-Bmask} || $options{-b} |
64 | || ( SDL::BigEndian() ? 0x0000ff00 : 0x00ff0000 ); |
65 | my $a = $options{-Amask} || $options{-a} |
66 | || ( SDL::BigEndian() ? 0x000000ff : 0xff000000 ); |
67 | |
68 | if ( $options{-from}|| $options{-f} ) { |
69 | my $src = $options{-from}|| $options{-f}; |
70 | $self = \SDL::CreateRGBSurfaceFrom($src,$w,$h,$d,$p,$r,$g,$b,$a); |
71 | } else { |
72 | $self = \SDL::CreateRGBSurface($f,$w,$h,$d,$r,$g,$b,$a); |
73 | } |
74 | } |
084b921f |
75 | croak "SDL::Surface::new failed. ", SDL::GetError() |
8fde61e3 |
76 | unless ( $$self); |
77 | bless $self,$class; |
78 | return $self; |
79 | } |
80 | |
81 | sub DESTROY { |
82 | SDL::FreeSurface(${$_[0]}); |
83 | } |
84 | |
85 | sub flags { |
86 | SDL::SurfaceFlags(${$_[0]}); |
87 | } |
88 | |
89 | sub palette { |
90 | SDL::SurfacePalette(${$_[0]}); |
91 | } |
92 | |
93 | sub bpp { |
94 | SDL::SurfaceBitsPerPixel(${$_[0]}); |
95 | } |
96 | |
97 | sub bytes_per_pixel { |
98 | SDL::SurfaceBytesPerPixel(${$_[0]}); |
99 | } |
100 | |
101 | sub Rshift { |
102 | SDL::SurfaceRshift(${$_[0]}); |
103 | } |
104 | |
105 | sub Gshift { |
106 | SDL::SurfaceGshift(${$_[0]}); |
107 | } |
108 | |
109 | sub Bshift { |
110 | SDL::SurfaceBshift(${$_[0]}); |
111 | } |
112 | |
113 | sub Ashift { |
114 | SDL::SurfaceAshift(${$_[0]}); |
115 | } |
116 | |
117 | sub Rmask { |
118 | SDL::SurfaceRmask(${$_[0]}); |
119 | } |
120 | |
121 | sub Gmask { |
122 | SDL::SurfaceGmask(${$_[0]}); |
123 | } |
124 | |
125 | sub Bmask { |
126 | SDL::SurfaceBmask(${$_[0]}); |
127 | } |
128 | |
129 | sub Amask { |
130 | SDL::SurfaceAmask(${$_[0]}); |
131 | } |
132 | |
133 | sub color_key { |
134 | SDL::SurfaceColorKey(${$_[0]}); |
135 | } |
136 | |
137 | sub alpha { |
138 | SDL::SurfaceAlpha(${$_[0]}); |
139 | } |
140 | |
141 | sub width { |
142 | SDL::SurfaceW(${$_[0]}); |
143 | } |
144 | |
145 | sub height { |
146 | SDL::SurfaceH(${$_[0]}); |
147 | } |
148 | |
149 | sub pitch { |
150 | SDL::SurfacePitch(${$_[0]}); |
151 | } |
152 | |
153 | sub pixels { |
154 | SDL::SurfacePixels(${$_[0]}); |
155 | } |
156 | |
157 | sub pixel { |
084b921f |
158 | croak "SDL::Surface::pixel requires a SDL::Color" |
8fde61e3 |
159 | if $_[3] && $SDL::DEBUG && !$_[3]->isa("SDL::Color"); |
160 | $_[3] ? |
161 | new SDL::Color -color => SDL::SurfacePixel(${$_[0]},$_[1],$_[2],${$_[3]}) : |
162 | new SDL::Color -color => SDL::SurfacePixel(${$_[0]},$_[1],$_[2]); |
163 | } |
164 | |
165 | sub fill { |
084b921f |
166 | croak "SDL::Surface::fill requires a SDL::Rect object" |
8fde61e3 |
167 | unless !$SDL::DEBUG || $_[1] == 0 || $_[1]->isa('SDL::Rect'); |
084b921f |
168 | croak "SDL::Surface::fill requires a SDL::Color object" |
8fde61e3 |
169 | unless !$SDL::DEBUG || $_[2]->isa('SDL::Color'); |
170 | if ($_[1] == 0 ) { |
171 | SDL::FillRect(${$_[0]},0,${$_[2]}); |
172 | } else { |
173 | SDL::FillRect(${$_[0]},${$_[1]},${$_[2]}); |
174 | } |
175 | } |
176 | |
177 | sub lockp { |
178 | SDL::MUSTLOCK(${$_[0]}); |
179 | } |
180 | |
181 | sub lock { |
182 | SDL::SurfaceLock(${$_[0]}); |
183 | } |
184 | |
185 | sub unlock { |
186 | SDL::SurfaceUnlock(${$_[0]}); |
187 | } |
188 | |
189 | sub update { |
190 | my $self = shift;; |
191 | if ($SDL::DEBUG) { |
192 | for (@_) { |
084b921f |
193 | croak "SDL::Surface::update requires SDL::Rect objects" |
8fde61e3 |
194 | unless $_->isa('SDL::Rect'); |
195 | } |
196 | } |
197 | SDL::UpdateRects($$self, map { ${$_} } @_ ); |
198 | } |
199 | |
200 | sub flip { |
201 | SDL::Flip(${$_[0]}); |
202 | } |
203 | |
204 | sub blit { |
205 | if ($SDL::DEBUG) { |
084b921f |
206 | croak "SDL::Surface::blit requires SDL::Rect objects" |
8fde61e3 |
207 | unless ($_[1] == 0 || $_[1]->isa('SDL::Rect')) |
208 | && ($_[3] == 0 || $_[3]->isa('SDL::Rect')); |
084b921f |
209 | croak "SDL::Surface::blit requires SDL::Surface objects" |
8fde61e3 |
210 | unless $_[2]->isa('SDL::Surface'); |
211 | } |
212 | SDL::BlitSurface(map { $_ != 0 ? ${$_} : $_ } @_); |
213 | } |
214 | |
215 | sub set_colors { |
216 | my $self = shift; |
217 | my $start = shift; |
218 | for (@_) { |
084b921f |
219 | croak "SDL::Surface::set_colors requires SDL::Color objects" |
8fde61e3 |
220 | unless !$SDL::DEBUG || $_->isa('SDL::Color'); |
221 | } |
222 | return SDL::SetColors($$self, $start, map { ${$_} } @_); |
223 | } |
224 | |
225 | sub set_color_key { |
084b921f |
226 | croak "SDL::Surface::set_color_key requires a SDL::Color object" |
8fde61e3 |
227 | unless !$SDL::DEBUG || (ref($_[2]) && $_[2]->isa('SDL::Color')); |
228 | SDL::SetColorKey(${$_[0]},$_[1],${$_[2]}); |
229 | } |
230 | |
231 | sub set_alpha { |
232 | SDL::SetAlpha(${$_[0]},$_[1],$_[2]); |
233 | } |
234 | |
235 | sub display_format { |
236 | my $self = shift; |
237 | my $tmp = SDL::DisplayFormat($$self); |
238 | SDL::FreeSurface ($$self); |
239 | $$self = $tmp; |
240 | $self; |
241 | } |
242 | |
243 | sub rgb { |
244 | my $self = shift; |
245 | my $tmp = SDL::ConvertRGB($$self); |
246 | SDL::FreeSurface($$self); |
247 | $$self = $tmp; |
248 | $self; |
249 | } |
250 | |
251 | sub rgba { |
252 | my $self = shift; |
253 | my $tmp = SDL::ConvertRGBA($$self); |
254 | SDL::FreeSurface($$self); |
255 | $$self = $tmp; |
256 | $self; |
257 | } |
258 | |
259 | sub rect { |
260 | my $self = shift; |
261 | new SDL::Rect -width => $self->width(), -height => $self->height(), |
262 | -x => $_[0] || 0, -y => $_[1] || 0; |
263 | } |
264 | |
265 | sub print { |
266 | my ($self,$x,$y,@text) = @_; |
267 | SDL::SFont::PutString( $$self, $x, $y, join('',@text)); |
268 | } |
269 | |
270 | sub save_bmp { |
271 | SDL::SaveBMP( ${$_[0]},$_[1]); |
272 | } |
273 | |
274 | sub video_info { |
275 | shift; |
276 | SDL::VideoInfo(); |
277 | } |
278 | |
279 | 1; |
280 | |
281 | __END__; |
282 | |
283 | =pod |
284 | |
285 | =head1 NAME |
286 | |
287 | SDL::Surface - a SDL perl extension |
288 | |
289 | =head1 SYNOPSIS |
290 | |
291 | use SDL::Surface; |
292 | $image = new SDL::Surface(-name=>"yomama.jpg"); |
293 | |
294 | =head1 DESCRIPTION |
295 | |
296 | The C<SDL::Surface> module encapsulates the SDL_Surface* structure, and |
297 | many of its ancillatory functions. Not only is it a workhorse of the |
298 | OO Layer, it is the base class for the C<SDL::App> class. |
299 | |
300 | =head1 EXPORTS |
301 | |
302 | SDL_SWSURFACE SDL_HWSURFACE |
303 | SDL_ASYNCBLIT SDL_ANYFORMAT |
304 | SDL_HWPALETTE SDL_DOUBLEBUF |
305 | SDL_FULLSCREEN SDL_OPENGL |
306 | SDL_OPENGLBLIT SDL_RESIZEABLE |
307 | SDL_NOFRAME SDL_SRCCOLORKEY |
308 | SDL_RLEACCEL SDL_SRCALPHA |
309 | SDL_PREALLOC |
310 | |
311 | =head1 METHODS |
312 | |
313 | =head2 new (-name => 'foo.png') |
314 | |
315 | The C<SDL::Surface> class can be instantiated in a number of different ways. |
316 | If support for the SDL_image library was included when SDL_perl was compiled, |
317 | the easiest way to create a new surface is to use the C<SDL::Surface::new> |
318 | method with the C<-name> option. This will load the image from the file |
319 | and return an object encapsulating the SDL_Surface*. |
320 | |
321 | =head2 new (-from => $buffer, ... ) |
322 | |
323 | If the contents of the new Surface is already in memory, C<SDL::Surface::new> |
324 | may be called with the C<-from> option to create an image from that section |
325 | of memory. This method takes the following additional parameters: |
326 | |
327 | =over 4 |
328 | |
329 | =item * |
330 | |
331 | -width the width of the image in pixels |
332 | |
333 | =item * |
334 | |
335 | -height the height of the image in pixels |
336 | |
337 | =item * |
338 | |
339 | -depth the number of bits per pixel |
340 | |
341 | =item * |
342 | |
343 | -pitch the number of bytes per line |
344 | |
345 | =item * |
346 | |
347 | -Rmask an optional bitmask for red |
348 | |
349 | =item * |
350 | |
351 | -Gmask an optional bitmask for green |
352 | |
353 | =item * |
354 | |
355 | -Bmask an optional bitmask for green |
356 | |
357 | =item * |
358 | |
359 | -Amask an optional bitmask for alpha |
360 | |
361 | =back |
362 | |
363 | =head2 new ( -flags => SDL_SWSURFACE, ... ) |
364 | |
365 | Finally, C<SDL::Suface::new> may be invoked with the C<-flags> option, in a |
366 | similar fashion to the C<-from> directive. This invocation takes the same |
367 | additional options as C<-from> with the exception of C<-pitch> which is ignored. |
368 | This method returns a new, blank, SDL::Surface option with any of the following |
369 | flags turned on: |
370 | |
371 | =over 4 |
372 | |
373 | =item * |
374 | |
375 | SWSURFACE() a non-accelerated surface |
376 | |
377 | =item * |
378 | |
379 | HWSURFACE() a hardware accelerated surface |
380 | |
381 | =item * |
382 | |
383 | SRCCOLORKEY() a surface with a transperant color |
384 | |
385 | =item * |
386 | |
387 | SRCALPHA() an alpha blended, translucent surface |
388 | |
389 | =back |
390 | |
391 | =head2 flags () |
392 | |
393 | C<SDL::Surface::flags> returns the flags with which the surface was initialized. |
394 | |
395 | =head2 palette () |
396 | |
397 | C<SDL::Surface::palette> currently returns a SDL_Palette*, this may change in |
398 | future revisions. |
399 | |
400 | =head2 bpp () |
401 | |
402 | C<SDL::Surface::bpp> returns the bits per pixel of the surface |
403 | |
404 | =head2 bytes_per_pixel () |
405 | |
406 | C<SDL::Surface::bytes_per_pixel> returns the bytes per pixel of the surface |
407 | |
408 | =head2 Rshift () |
409 | |
410 | C<SDL::Surface::Rshift> returns the bit index of the red field for the surface's pixel format |
411 | |
412 | =head2 Gshift () |
413 | |
414 | C<SDL::Surface::Gshift> returns the bit index of the green field for the surface's pixel format |
415 | |
416 | =head2 Bshift () |
417 | |
418 | C<SDL::Surface::Bshift> returns the bit index of the blue field for the surface's pixel format |
419 | |
420 | =head2 Ashift () |
421 | |
422 | C<SDL::Surface::Ashift> returns the bit index of the alpha field for the surface's pixel format |
423 | |
424 | =head2 Rmask () |
425 | |
426 | C<SDL::Surface::Rmask> returns the bit mask for the red field for teh surface's pixel format |
427 | |
428 | =head2 Gmask () |
429 | |
430 | C<SDL::Surface::Gmask> returns the bit mask for the green field for teh surface's pixel format |
431 | |
432 | =head2 Bmask () |
433 | |
434 | C<SDL::Surface::Bmask> returns the bit mask for the blue field for teh surface's pixel format |
435 | |
436 | =head2 Amask () |
437 | |
438 | C<SDL::Surface::Amask> returns the bit mask for the alpha field for teh surface's pixel format |
439 | |
440 | =head2 color_key () |
441 | |
442 | C<SDL::Surface::color_key> returns the current color key for the image, which can be set with |
443 | the C<SDL::Surface::set_color_key> method. Before calling C<SDL::Surface::color_key> on |
444 | a image, you should fist call C<SDL::Surface::display_format> to convert it to the same |
445 | format as the display. Failure to do so will result in failure to apply the correct color_key. |
446 | |
447 | =head2 alpha () |
448 | |
449 | C<SDL::Surface::alpha> returns the current alpha value for the image, which can be set with |
450 | the C<SDL::Surface::set_alpha> method. |
451 | |
452 | =head2 width () |
453 | |
454 | C<SDL::Surface::width> returns the width in pixels of the surface |
455 | |
456 | =head2 height () |
457 | |
458 | C<SDL::Surface::height> returns the height in pixels of the surface |
459 | |
460 | =head2 pitch () |
461 | |
462 | C<SDL::Surface::pitch> returns the width of a surface's scanline in bytes |
463 | |
464 | =head2 pixels () |
465 | |
466 | C<SDL::Surface::pixels> returns a Uint8* to the image's pixel data. This is not |
467 | inherently useful within perl, though may be used to pass image data to user provided |
468 | C functions. |
469 | |
470 | =head2 pixel (x,y,[color]) |
471 | |
472 | C<SDL::Surface::pixel> will set the color value of the pixel at (x,y) to the given |
473 | color if provided. C<SDL::Surface::pixel> returns a SDL::Color object for the |
474 | color value of the pixel at (x,y) after any possible modifications. |
475 | |
476 | =head2 fill (rect,color) |
477 | |
478 | C<SDL::Surface::fill> will fill the given SDL::Rect rectangle with the specified SDL::Color |
479 | This function optionally takes a SDL_Rect* and a SDL_Color* |
480 | |
481 | =head2 lockp () |
482 | |
483 | C<SDL::Surface::lockp> returns true if the surface must be locked |
484 | |
485 | =head2 lock () |
486 | |
487 | C<SDL::Surface::lock> places a hardware lock if necessary, preventing access to |
488 | the surface's memory |
489 | |
490 | =head2 unlock () |
491 | |
492 | C<SDL::Surface::unlock> removes any hardware locks, enabling blits |
493 | |
494 | =head2 update ( rects...) |
495 | |
496 | C<SDL::Surface::update> takes one or more SDL::Rect's which determine which sections |
497 | of the image are to be updated. This option is only useful on the appliaction surface. |
498 | |
499 | =head2 flip () |
500 | |
501 | C<SDL::Surface::flip> updates the full surface, using a double buffer if available |
502 | |
503 | =head2 blit (srect,dest,drect) |
504 | |
505 | C<SDL::Surface::blit> blits the current surface onto the destination surface, |
506 | according to the provided rectangles. If a rectangle is 0, then the full surface is used. |
507 | |
508 | =head2 set_colors (start,colors...) |
509 | |
510 | C<SDL::Surface::set_colors> updates the palette starting at index C<start> with the |
511 | supplied colors. The colors may either be SDL::Color objects or SDL_Color* from the |
512 | low level C-style API. |
513 | |
514 | =head2 set_color_key (flag,pixel) or (flag,x,y) |
515 | |
516 | C<SDL::Surface::set_color_key> sets the blit flag, usually SDL_SRCCOLORKEY, |
517 | to the specified L<SDL::Color> object. Optional a SDL_Color* may be passed. |
518 | |
519 | =head2 set_alpha (flag,alpha) |
520 | |
521 | C<SDL::Surface::set_alpha> sets the opacity of the image for alpha blits. |
522 | C<alpha> takes a value from 0x00 to 0xff. |
523 | |
524 | =head2 display_format () |
525 | |
526 | C<SDL::Surface::display_format> converts the surface to the same format as the |
527 | current screen. |
528 | |
529 | =head2 rgb () |
530 | C<SDL::Surface::rgb> converts the surface to a 24 bit rgb format regardless of the |
531 | initial format. |
532 | |
533 | =head2 rgba () |
534 | C<SDL::Surface::rgba> converts the surface to a 32 bit rgba format regarless of the |
535 | initial format. |
536 | |
537 | =head2 print (x,y,text...) |
538 | |
539 | C<SDL::Surface::print> renders the text using the current font onto the image. |
540 | This option is only supported for with SDL_image and SFont. |
541 | |
542 | =head2 save_bmp (filename) |
543 | |
544 | C<SDL::Surface::save_bmp> saves the surface to filename in Windows BMP format. |
545 | |
546 | =head2 video_info () |
547 | |
548 | C<SDL::Surface::video_info> returns a hash describing the current state of the |
549 | video hardware. |
550 | |
551 | =head1 AUTHOR |
552 | |
553 | David J. Goehrig |
554 | |
555 | =head1 SEE ALSO |
556 | |
557 | L<perl> L<SDL::App> L<SDL::Color> L<SDL::Palette> L<SDL::Rect> |
558 | |
559 | =cut |