Tobias Leich > SDL-2.544 > SDLx::Surface

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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.

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