NAME

SDL::GFX::Primitives - basic drawing functions

DESCRIPTION

All functions take an SDL::Surface object as first parameter. This can be a new surface that will be blitted afterwards, can be an surface obtained by SDL::Video::set_video_mode or can be an SDLx::App.

The color values for the _color functions are 0xRRGGBBAA (32bit), even if the surface uses e. g. 8bit colors.

METHODS

pixel


            
              
              int SDL::GFX::Primitives::pixel_color( $surface, $x, $y, $color );
int SDL::GFX::Primitives::pixel_RGBA(  $surface, $x, $y, $r, $g, $b, $a );

Draws a pixel at point x/$y. You can pass the color by 0xRRGGBBAA or by passing 4 values. One for red, green, blue and alpha.


            
              
              use SDL;
use SDL::Video;
use SDL::Surface;
use SDL::GFX::Primitives;
my $surface = SDL::Video::set_video_mode(640, 480, 32, SDL_SWSURFACE);
SDL::GFX::Primitives::pixel_color($surface, 2, 2, 0xFF0000FF);             # red pixel
SDL::GFX::Primitives::pixel_RGBA( $surface, 4, 4, 0x00, 0xFF, 0x00, 0xFF); # green pixel

hline


            
              
              int SDL::GFX::Primitives::hline_color( $surface, $x1, $x2, $y, $color );
int SDL::GFX::Primitives::hline_RGBA(  $surface, $x1, $x2, $y, $r, $g, $b, $a );

Draws a line horizontally from $x1/$y to $x2/$y.

vline


            
              
              int SDL::GFX::Primitives::vline_color( $surface, $x, $y1, $y2, $color );
int SDL::GFX::Primitives::vline_RGBA(  $surface, $x, $y1, $y2, $r, $g, $b, $a );

Draws a line vertically from $x/$y1 to $x/$y2.

rectangle


            
              
              int SDL::GFX::Primitives::rectangle_color( $surface, $x1, $y1, $x2, $y2, $color );
int SDL::GFX::Primitives::rectangle_RGBA(  $surface, $x1, $y1, $x2, $y2, $r, $g, $b, $a );

Draws a rectangle. Upper left edge will be at $x1/$y1 and lower right at $x2/$y. The colored border has a width of 1 pixel.

box


            
              
              int SDL::GFX::Primitives::box_color( $surface, $x1, $y1, $x2, $y2, $color );
int SDL::GFX::Primitives::box_RGBA(  $surface, $x1, $y1, $x2, $y2, $r, $g, $b, $a );

Draws a filled rectangle.

line


            
              
              int SDL::GFX::Primitives::line_color( $surface, $x1, $y1, $x2, $y2, $color );
int SDL::GFX::Primitives::line_RGBA(  $surface, $x1, $y1, $x2, $y2, $r, $g, $b, $a );

Draws a free line from $x1/$y1 to $x2/$y.

aaline


            
              
              int SDL::GFX::Primitives::aaline_color( $surface, $x1, $y1, $x2, $y2, $color );
int SDL::GFX::Primitives::aaline_RGBA(  $surface, $x1, $y1, $x2, $y2, $r, $g, $b, $a );

Draws a free line from $x1/$y1 to $x2/$y. This line is anti aliased.

circle


            
              
              int SDL::GFX::Primitives::circle_color( $surface, $x, $y, $r, $color );
int SDL::GFX::Primitives::circle_RGBA(  $surface, $x, $y, $rad, $r, $g, $b, $a );

arc


            
              
              int SDL::GFX::Primitives::arc_color( $surface, $x, $y, $r, $start, $end, $color );
int SDL::GFX::Primitives::arc_RGBA(  $surface, $x, $y, $rad, $start, $end, $r, $g, $b, $a );

Note: You need lib SDL_gfx 2.0.17 or greater for this function.

aacircle


            
              
              int SDL::GFX::Primitives::aacircle_color( $surface, $x, $y, $r, $color );
int SDL::GFX::Primitives::aacircle_RGBA(  $surface, $x, $y, $rad, $r, $g, $b, $a );

Note: You need lib SDL_gfx 2.0.17 or greater for this function.

filled_circle


            
              
              int SDL::GFX::Primitives::filled_circle_color( $surface, $x, $y, $r, $color );
int SDL::GFX::Primitives::filled_circle_RGBA(  $surface, $x, $y, $rad, $r, $g, $b, $a );

ellipse


            
              
              int SDL::GFX::Primitives::ellipse_color( $surface, $x, $y, $rx, $ry, $color );
int SDL::GFX::Primitives::ellipse_RGBA(  $surface, $x, $y, $rx, $ry, $r, $g, $b, $a );

aaellipse


            
              
              int SDL::GFX::Primitives::aaellipse_color( $surface, $xc, $yc, $rx, $ry, $color );
int SDL::GFX::Primitives::aaellipse_RGBA(  $surface, $x, $y, $rx, $ry, $r, $g, $b, $a );

filled_ellipse


            
              
              int SDL::GFX::Primitives::filled_ellipse_color( $surface, $x, $y, $rx, $ry, $color );
int SDL::GFX::Primitives::filled_ellipse_RGBA(  $surface, $x, $y, $rx, $ry, $r, $g, $b, $a );

pie


            
              
              int SDL::GFX::Primitives::pie_color( $surface, $x, $y, $rad, $start, $end, $color );
int SDL::GFX::Primitives::pie_RGBA(  $surface, $x, $y, $rad, $start, $end, $r, $g, $b, $a );

This draws an opened pie. $start and $end are degree values. 0 is at right, 90 at bottom, 180 at left and 270 degrees at top.

filled_pie


            
              
              int SDL::GFX::Primitives::filled_pie_color( $surface, $x, $y, $rad, $start, $end, $color );
int SDL::GFX::Primitives::filled_pie_RGBA(  $surface, $x, $y, $rad, $start, $end, $r, $g, $b, $a );

trigon


            
              
              int SDL::GFX::Primitives::trigon_color( $surface, $x1, $y1, $x2, $y2, $x3, $y3, $color );
int SDL::GFX::Primitives::trigon_RGBA(  $surface, $x1, $y1, $x2, $y2, $x3, $y3, $r, $g, $b, $a );

aatrigon


            
              
              int SDL::GFX::Primitives::aatrigon_color( $surface, $x1, $y1, $x2, $y2, $x3, $y3, $color );
int SDL::GFX::Primitives::aatrigon_RGBA(  $surface, $x1, $y1, $x2, $y2, $x3, $y3, $r, $g, $b, $a );

filled_trigon


            
              
              int SDL::GFX::Primitives::filled_trigon_color( $surface, $x1, $y1, $x2, $y2, $x3, $y3, $color );
int SDL::GFX::Primitives::filled_trigon_RGBA(  $surface, $x1, $y1, $x2, $y2, $x3, $y3, $r, $g, $b, $a );

polygon


            
              
              int SDL::GFX::Primitives::polygon_color( $surface, $vx, $vy, $n, $color );
int SDL::GFX::Primitives::polygon_RGBA(  $surface, $vx, $vy, $n, $r, $g, $b, $a );

Example:


            
              
              SDL::GFX::Primitives::polygon_color($display, [262, 266, 264, 266, 262], [243, 243, 245, 247, 247], 5, 0xFF0000FF);

aapolygon


            
              
              int SDL::GFX::Primitives::aapolygon_color( $surface, $vx, $vy, $n, $color );
int SDL::GFX::Primitives::aapolygon_RGBA(  $surface, $vx, $vy, $n, $r, $g, $b, $a );

filled_polygon


            
              
              int SDL::GFX::Primitives::filled_polygon_color( $surface, $vx, $vy, $n, $color );
int SDL::GFX::Primitives::filled_polygon_RGBA(  $surface, $vx, $vy, $n, $r, $g, $b, $a );

textured_polygon


            
              
              int SDL::GFX::Primitives::textured_polygon( $surface, $vx, $vy, $n, $texture, $texture_dx, $texture_dy );

filled_polygon_MT


            
              
              int SDL::GFX::Primitives::filled_polygon_color_MT( $surface, $vx, $vy, $n, $color, $polyInts, $polyAllocated );
int SDL::GFX::Primitives::filled_polygon_RGBA_MT(  $surface, $vx, $vy, $n, $r, $g, $b, $a, $polyInts, $polyAllocated );

Note: You need lib SDL_gfx 2.0.17 or greater for this function.

textured_polygon_MT


            
              
              int SDL::GFX::Primitives::textured_polygon_MT( $surface, $vx, $vy, $n, $texture, $texture_dx, $texture_dy, $polyInts, $polyAllocated );

Note: You need lib SDL_gfx 2.0.17 or greater for this function.

bezier


            
              
              int SDL::GFX::Primitives::bezier_color( $surface, $vx, $vy, $n, $s, $color );
int SDL::GFX::Primitives::bezier_RGBA(  $surface, $vx, $vy, $n, $s, $r, $g, $b, $a );

$n is the number of elements in $vx and $vy, and $s is the number of steps. So the bigger $s is, the smother it becomes.

Example:


            
              
              SDL::GFX::Primitives::bezier_color($display, [390, 392, 394, 396], [243, 255, 235, 247], 4, 20, 0xFF00FFFF);

character


            
              
              int SDL::GFX::Primitives::character_color( $surface, $x, $y, $c, $color );
int SDL::GFX::Primitives::character_RGBA(  $surface, $x, $y, $c, $r, $g, $b, $a );

$c is the character that will be drawn at $x,$y.

string


            
              
              int SDL::GFX::Primitives::string_color( $surface, $x, $y, $c, $color );
int SDL::GFX::Primitives::string_RGBA(  $surface, $x, $y, $c, $r, $g, $b, $a );

set_font


            
              
              void SDL::GFX::Primitives::set_font(fontdata, $cw, $ch );

The fontsets are included in the SDL_gfx distribution. Check http://www.ferzkopp.net/joomla/content/view/19/14/ for more.

Example:


            
              
              my $font = '';
open(FH, '<', 'data/5x7.fnt');
binmode(FH);
read(FH, $font, 4096);
close(FH);
SDL::GFX::Primitives::set_font($font, 5, 7);

AUTHORS

See "AUTHORS" in SDL.

To install SDL, copy and paste the appropriate command in to your terminal.

cpanm

cpanm SDL

CPAN shell

perl -MCPAN -e shell
install SDL

For more information on module installation, please visit the detailed CPAN module installation guide.

	Global
`s`	Focus search bar
`?`	Bring up this help dialog

	GitHub
`g` `p`	Go to pull requests
`g` `i`	go to github issues (only if github is preferred repository)

	POD
`g` `a`	Go to author
`g` `c`	Go to changes
`g` `i`	Go to issues
`g` `d`	Go to dist
`g` `r`	Go to repository/SCM
`g` `s`	Go to source
`g` `b`	Go to file browse

	Search terms
module: (e.g. module:Plugin)
distribution: (e.g. distribution:Dancer auth)
author: (e.g. author:SONGMU Redis)
version: (e.g. version:1.00)

NAME

CATEGORY

DESCRIPTION

METHODS

pixel

hline

vline

rectangle

box

line

aaline

circle

arc

aacircle

filled_circle

ellipse

aaellipse

filled_ellipse

pie

filled_pie

trigon

aatrigon

filled_trigon

polygon

aapolygon

filled_polygon

textured_polygon

filled_polygon_MT

textured_polygon_MT

bezier

character

string

set_font

AUTHORS

Module Install Instructions