pods::SDL::Cursor(3pm) | User Contributed Perl Documentation | pods::SDL::Cursor(3pm) |
NAME¶
SDL::Cursor - Mouse cursor structure
CATEGORY¶
Core, Mouse, Structure
SYNOPSIS¶
my $cursor = SDL::Cursor->new( \@data, \@mask, $width, $height, $hotspot_left, $hotspot_top ); SDL::Mouse::set_cursor($cursor);
DESCRIPTION¶
The "SDL::Cursor" module handles mouse cursors, and allows the developer to use custom-made cursors. Note that cursors can only be in black and white.
METHODS¶
new¶
my $cursor = SDL::Cursor->new( \@data, \@mask, $width, $height, $hotspot_left, $hotspot_top );
Create a cursor using the specified data and mask (in MSB format). The cursor is created in black and white according to the following:
Data / Mask Resulting pixel on screen 0 / 1 White 1 / 1 Black 0 / 0 Transparent 1 / 0 Inverted color if possible, black if not.
If you want to have color cursor, then this function is not for you. Instead, you should hide the cursor with SDL::Mouse::show_cursor(SDL_DISABLE). Then in your main loop, when you draw graphics, draw a "SDL::Surface" at the location of the mouse cursor.
Example:
use SDL; use SDL::Video; use SDL::Mouse; use SDL::Cursor; SDL::init(SDL_INIT_VIDEO); SDL::Video::set_video_mode(640, 480, 16, SDL_SWSURFACE); my @data = ( 0b00000000, 0b00111100, 0b01111110, 0b01111110, 0b01111110, 0b01111110, 0b00111100, 0b00000000 ); my @mask = ( 0b00111100, 0b01111110, 0b11100111, 0b11000011, 0b11000011, 0b11100111, 0b01111110, 0b00111100 ); my $cursor = SDL::Cursor->new(\@data, \@mask, 8, 8, 0, 0); sleep(1); SDL::Mouse::set_cursor($cursor); sleep(5);
The width of cursors work in groups of 8. If the width is above 8, twice the amount of elements in @data and @mask are required. If the width is above 16, three times are required, and so on. For example, if you wanted a 9 pixel crosshair you might do the following:
my @data = ( 0b00001000,0b00000000, 0b00001000,0b00000000, 0b00001000,0b00000000, 0b00001000,0b00000000, 0b11111111,0b10000000, 0b00001000,0b00000000, 0b00001000,0b00000000, 0b00001000,0b00000000, 0b00001000,0b00000000, ); my @mask = @data; my $cursor = SDL::Cursor->new(\@data, \@mask, 9, 9, 4, 4);
The hotspot is offset by 4 pixels because a crosshair clicks from the center instead of the top left.
AUTHORS¶
See "AUTHORS" in SDL.
SEE ALSO¶
perl SDL::Mouse
2024-03-28 | perl v5.38.2 |