Provided by: libsdl-perl_2.546-2build1_amd64 
NAME
SDLx::Surface - Graphic surface matrix extension
CATEGORY
Extension
SYNOPSIS
use SDL;
use SDL::Video;
use SDLx::Surface;
# Create the main surface (display)
SDL::init(SDL_INIT_VIDEO);
my $display = SDL::Video::set_video_mode(640, 480, 16, SDL_SWSURFACE);
my $surf_matrix = SDLx::Surface->new( surface => $display);
$surf_matrix->[10][10] = 0xFFFF; #for 16bpp write white at x = 10 and y=10
$surf_matrix->surface( $new_surface );
my $orig_surface = $surf_matrix->surface();
DESCRIPTION
An "SDLx::Surface" allows matrix read and write to a surface, safely.
CONSTRUCTOR
new
Takes a SDL::Surface in hash format.
If a surface is passed to 'surface =>' that is loaded. Otherwise you can define at least a
width and a height.
SDLx::Surface->new( surface => $surface) # The $surface is loaded
SDLx::Surface->new( width=> 400, height=>200)
# A SDL::Surface->new( SDL_ANYFORMAT, 400, 200, 32) is loaded
SDLx::Surface->new( width=> 400, height=>200, flags=> SDL_SWSURFACE, depth=>24 )
# A SDL::Surface->new( SDL_SWSURFACE, 400, 200, 24) is loaded
SDLx::Surface->new( width=> 400, height=>200, flags=> SDL_SWSURFACE, depth=>32, greenmask=>0xFF000000 )
# A SDL::Surface->new( SDL_ANYFORMAT, 400, 200, 32, 0, 0xFF000000,0, 0, 0 ) is loaded
SDLx::Surface->new( w => 1, h => 1, color => 0xFF0000FF )
# A SDL::Surface->new( SDL_ANYFORMAT, 1, 1, 32, 0, 0, 0, 0 ) is loaded
all pixels are colored with color (red)
display
If SDLx::App::new or SDL::Video::get_video_mode called before then:
my $appx = SDLx::Surface::display();
gets the display if it is already made. Passed options are ignored. Otherwise you can
quickly make the display with :
SDLx::Surface::display( width => 20, height => 20) #depth => 32 and SDL_ANYFORMAT used
or you can also pass flags and depth.
SDLx::Surface::display( width => 20, height => 20, flags=> SDL_HWSURFACE, depth=>24)
You can also use the keys "w" and "h" in place of "width" and "height", as with "new".
Get or create the main display surface and attach to a "SDLx::Surface".
duplicate
Does a attributes only, no pixel, copy of another SDLx::Surface.
ATTRIBUTES
surface
If a SDL::Surface is passed it is attached to the matrix. Returns the SDL::Surface that is
currently attached to this SDLx::Surface
w, h, format, pitch, flags
Returns the inner SDL::Surface's respective attribute. See "SDL::Surface".
clip_rect
Sets the passed "SDL::Rect" as the new clip_rect for the surface. Returns the
SDL::Surface's clip_rect. See SDL::Video::get_clip_rect and SDL::Video::set_clip_rect.
=head1 EXTENSIONS
load
my $surface = SDLx::Surface->load( 'hero.png' );
my $surface = SDLx::Surface->load( 'hero.dat', 'bmp' );
Loads the given image file into a new SDLx::Surface surface. A new surface is always
created, even if you call it from an already crafted object. Croaks on errors such as no
support built for that image extension or a file reading error (the error message is
SDL::get_error and should give more details).
Note that load() will automatically figure out the extension based on the filename you
provide. If you wish to force an extension for whatever reason (like having a filename
with a different extension or none at all), you can optionally pass the file type as a
second parameter. Case is not relevant.
If you don't have SDL_image in your build, only bitmap images will be supported.
Returns the new Surface.
blit
$sdlx_surface->blit( $dest, $src_rect, $dest_rect );
Blits "SDLx::Surface" onto $dest surface. $src_rect or $dest_rect are optional. If
$src_rect is omitted, it will be the size of the entire surface. If $dest_rect is omitted,
it will be blitted at "(0, 0)". $src_rect or $dest_rect can be array refs or "SDL::Rect".
$dest can be "SDLx::Surface" or "SDL::Surface".
Note that the final blit rectangle is stored in $dest_rect after clipping is performed.
Returns $self
blit_by
$sdlx_surface->blit_by( $src, $src_rect, $dest_rect );
Does the same as "blit" but the "SDLx::Surface" is the one being blitted to. This is
useful when the surface you have isn't an "SDLx::Surface", but the surface it is being
blitted to is.
Note that the final blit rectangle is stored in $dest_rect after clipping is performed.
flip
Applies SDL::Video::flip to the Surface, with error checking.
Returns $self
update
$sdlx_surface->update(); # whole surface is updated
$sdlx_surface->update([0,0,1,1]); # only that area (0,0,1,1) is updated
$sdlx_surface->update( [ SDL::Rect->new(0,0,1,2) ... ]); # defined rects are updated
Applies SDL::Video::update_rect for no rect or 1 array ref. Applies
SDL::Video::update_rects for array of SDL::Rects.
Returns $self
draw_rect
$sdlx_surface->draw_rect( [$x,$y,$w,$h], 0xFFFF00FF );
$sdlx_surface->draw_rect( SDL::Rect->new($x,$y,$w,$h), 0xFFFF00FF );
Draws a rect on the surface with the given color. If the rect is omitted, the colored rect
will be drawn to the entire surface.
Returns $self
draw_line
$sdlx_surface->draw_line( [$x1, $y1], [$x2, $y2], $color, $antialias); # $color is a number
$sdlx_surface->draw_line( [$x1, $y1], [$x2, $y2], \@color, $antialias); #
Draws a line on the surface. Antialias is turned on if $antialias is true.
Returns $self
draw_circle
$sdlx_surface->draw_circle( [$x1, $y1], $radius, \@color, $antialias );
Draws an unfilled circle at "($x1,$y1)" of size $radius and $color. Antialias is turned
on if $antialias is true. Returns $self
draw_circle_filled
$sdlx_surface->draw_circle_filled( [$x1, $y1], $radius, \@color );
Draws an filled circle at "($x1,$y1)" of size $radius and $color. Antialias is turned on
automatically. Returns $self
draw_trigon
$sdlx_surface->draw_trigon( [ [$x1, $y1], [$x2, $y2], [$x3, y3] ], \@color, $antialias );
Draws an unfilled trigon (triangle) with vertices "($x1,$y1)", "($x2,$y2)", "($x3,$y3)"
and $color. Antialias is turned on if $antialias is true. Returns $self
draw_trigon_filled
$sdlx_surface->draw_trigon_filled( [ [$x1, $y1], [$x2, $y2], [$x3, y3] ], \@color );
Draws an filled trigon (triangle) with vertices "($x1,$y1)", "($x2,$y2)", "($x3,$y3)" and
$color. Antialias is turned on automatically. Returns $self
draw_polygon
$sdlx_surface->draw_polygon( [ [$x1, $y1], [$x2, $y2], [$x3, y3], ... ], \@color, $antialias );
Draws an unfilled polygon with vertices "($xN,$yN)" and $color. Antialias is turned on if
$antialias is true. Returns $self
draw_polygon_filled
$sdlx_surface->draw_polygon_filled( [ [$x1, $y1], [$x2, $y2], [$x3, y3], ... ], \@color );
Draws an filled polygon with vertices "($xN,$yN)" and $color. Antialias is turned on
automatically. Returns $self
draw_arc
$sdlx_surface->draw_arc( [ $x, $y ], $radius, $start, $end, $color );
Draws an arc around "($x,$y)" with $radius, $start radius, $end radius and $color.
Returns $self
draw_ellipse
$sdlx_surface->draw_ellipse( [ $x, $y ], $rx, $ry, $color );
Draws an unfilled ellipse centered at "($x,$y)" with horizontal radius $rx, vertical
radius $ry and $color. Antialias is turned on if $antialias is true.
Returns $self
draw_ellipse_filled
$sdlx_surface->draw_ellipse_filled( [ $x, $y ], $rx, $ry, $color );
Draws an filled ellipse centered at "($x,$y)" with horizontal radius $rx, vertical radius
$ry and $color. Antialias is turned on automatically.
Returns $self
draw_bezier
$sdlx_surface->draw_bezier( [ [$x1, $y1], [$x2, $y2], [$x3, y3], ... ], $s, $color );
Draws a bezier curve of points "($xN,$yN)" using $s steps for interpolation and $color.
Antialias is turned on automatically.
Returns $self
draw_gfx_text
Draw text using gfx (not pretty but fast) at give vector, color.
$surf->draw_gfx_text( [0,0], 0xffffffff, "fooo");
$surf->draw_gfx_text( [10,10], [20,20,20,20], "fooo");
You can also set the gfx font but passing a hash reference as shown below.
my $f = '';
open( my $FH, '<', 'test/data/5x7.fnt');
binmode ($FH);
read($FH, $f, 4096);
close ($FH);
my $font = {data=>$f, cw => 5, ch => 7};
$surf->draw_gfx_text( [0,0], 0xffffffff, "fooo", $font );
Returns $self
AUTHORS
See "AUTHORS" in SDL.