Beefy Boxes and Bandwidth Generously Provided by pair Networks
Don't ask to ask, just ask

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
hello bliako,

also XPM format (used for icons in Tk) can be fed with an array like in my woodpeaker icon

I rewrote your exmple using GD and maybe is faster (untested).

my $W = 100; my $W = 100; use GD; # create a new image $im = new GD::Image($W,$W) or die "called to new GD::Image has failed +.";; for my $x (0..$W){ for my $y (0..$H){ my $rgb = $result->[$x + $y * $W]; next unless defined $rgb; # ARGB here, or any other scheme my $R = ($rgb & 0x00FF0000) >> 16; my $G = ($rgb & 0x0000FF00) >> 8; my $B = ($rgb & 0x000000FF); my $color = $im->colorAllocate($R, $G, $B); $im->setPixel($x, $y, $color); } } open my $outfile, '>', 'out.png' or die; binmode $outfile; print $outfile $im->png(0); # 0 is no compression. Possible values 0-9


There are no rules, there are no thumbs..
Reinvent the wheel, then learn The Wheel; may be one day you reinvent one of THE WHEELS.

In reply to Re: How to create and save an image from RGB values -- GD by Discipulus
in thread How to create and save an image from RGB values by bliako

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or or How to display code and escape characters are good places to start.
Log In?

What's my password?
Create A New User
Domain Nodelet?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others exploiting the Monastery: (7)
As of 2022-08-10 07:52 GMT
Find Nodes?
    Voting Booth?

    No recent polls found