10-31-2018
Quote:
Originally Posted by
ignatius
I'm currently investigating ways of working around this SDL limitation, which i'm assuming it is.
Not an SDL limitation, a side-effect of the way the keyboard and screen is being used. Which depends on what backend is being used. Sorry if I sound like a broken record but that's a really important unknown.
A link to the patch you used to get Links using SDL would also be good. I've a passing familiary with SDL and can check if I see anything obviously wrong.
That you're compiling is also useful. We might add lines to answer the question if we really can't find it out any other way.
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LEARN ABOUT DEBIAN
sdl::gfx::rotozoom
pods::SDL::GFX::Rotozoom(3pm) User Contributed Perl Documentation pods::SDL::GFX::Rotozoom(3pm)
NAME
SDL::GFX::Rotozoom - rotation and zooming functions for surfaces
CATEGORY
GFX
CONSTANTS
The constants are exported by default. You can avoid this by doing:
use SDL::GFX::Rotozoom ();
and access them directly:
SDL::GFX::Rotozoom::SMOOTHING_OFF;
or by choosing the export tags below:
Export tag: ':smoothing'
SMOOTHING_OFF
SMOOTHING_ON
METHODS
surface
my $new_surface = SDL::GFX::Rotozoom::surface( $surface, $angle, $zoom, $smooth );
With "SDL::GFX::Rotozoom::surface" you have the opportunity to rotate and zoom a given surface. The surface will be rotated counter
clockwise (in degrees). Pass "SMOOTHING_ON" or "SMOOTHING_OFF" in order to turn it on or off.
Note: The new surface (with $"zoom == 1") will usually be bigger than the source $surface.
Note: Note: new surface should be less than 16384 in width and height.
Example:
use SDL;
use SDL::Video;
use SDL::Rect;
use SDL::Surface;
use SDL::GFX::Rotozoom;
my $screen_width = 640;
my $screen_height = 480;
SDL::init(SDL_INIT_VIDEO);
my $screen = SDL::Video::set_video_mode(800, 600, 32, SDL_SWSURFACE);
my $picture = SDL::Video::load_BMP('test.bmp');
my $rotated = SDL::GFX::Rotozoom::surface( $picture, 45, 0.8, SMOOTHING_ON );
SDL::Video::blit_surface( $rotated, SDL::Rect->new(0, 0, $rotated->w, $rotated->h),
$screen, SDL::Rect->new(0, 0, 0, 0) );
SDL::Video::update_rect( $screen, 0, 0, 0, 0 );
sleep(2);
surface_xy
my $new_surface = SDL::GFX::Rotozoom::surface_xy( $surface, $angle, $zoom_x, $zoom_y, $smooth );
Same as SDL::GFX::Rotozoom::surface but you can specify the zoomlevel for x and y separately.
surface_size
my ($new_width, $new_height) = @{ SDL::GFX::Rotozoom::surface_size( $width, $height, $angle, $zoom ) };
"surface_size" will give you the width and height of an rotating/zoom operation for the given $width and $height. Helpful for knowing the
surface size before actually do the rotating/zoom operation.
surface_size_xy
my ($new_width, $new_height) = @{ SDL::GFX::Rotozoom::surface_size_xy( $width, $height, $angle, $zoom_x, $zoom_y ) };
Same as SDL::GFX::Rotozoom::surface_size but you can specify the zoomlevel for x and y separately.
zoom_surface
my $new_surface = SDL::GFX::Rotozoom::zoom_surface( $surface, $zoom_x, $zoom_y, $smooth );
Same as SDL::GFX::Rotozoom::surface_xy except you can zoom only.
zoom_surface_size
my ($new_width, $new_height) = SDL::GFX::Rotozoom::zoom_surface_size( $width, $height, $zoom_x, $zoom_y );
Same as SDL::GFX::Rotozoom::surface_size_xy except you can specify zoom only.
shrink_surface
my $new_surface = SDL::GFX::Rotozoom::shrink_surface( $surface, $factor_x, $factor_y );
Specialized function for shrinking a surface.
rotate_surface_90_degrees
my $new_surface = SDL::GFX::Rotozoom::rotate_surface_90_degrees( $surface, $num_clockwise_turns );
Rotating a surface $num_clockwise_turns-times.
AUTHORS
See "AUTHORS" in SDL.
perl v5.14.2 2012-05-28 pods::SDL::GFX::Rotozoom(3pm)