IMAGEPALETTETOTRUECOLOR(3) 1 IMAGEPALETTETOTRUECOLOR(3)imagepalettetotruecolor - Converts a palette based image to true colorSYNOPSIS
bool imagepalettetotruecolor (resource $src)
DESCRIPTION
Converts a palette based image, created by functions like imagecreate(3) to a true color image, like imagecreatetruecolor(3).
PARAMETERS
o $
image -An image resource, returned by one of the image creation functions, such as imagecreatetruecolor(3).
RETURN VALUES
Returns TRUE if the convertion was complete, or if the source image already is a true color image, otherwise FALSE is returned.
EXAMPLES
Example #1
Converts any image resource to true color
<?php
// Backwards compatiblity
if(!function_exists('imagepalettetotruecolor'))
{
function imagepalettetotruecolor(&$src)
{
if(imageistruecolor($src))
{
return(true);
}
$dst = imagecreatetruecolor(imagesx($src), imagesy($src));
imagecopy($dst, $src, 0, 0, 0, 0, imagesx($src), imagesy($src));
imagedestroy($src);
$src = $dst;
return(true);
}
}
// Helper closure
$typeof = function() use($im)
{
echo 'typeof($im) = ' . (imageistruecolor($im) ? 'true color' : 'palette'), PHP_EOL;
};
// Create a palette based image
$im = imagecreate(100, 100);
$typeof();
// Convert it to true color
imagepalettetotruecolor($im);
$typeof();
// Free the memory
imagedestroy($im);
?>
The above example will output:
typeof($im) = palette
typeof($im) = true color
SEE ALSO imagecreatetruecolor(3), imageistruecolor(3).
PHP Documentation Group IMAGEPALETTETOTRUECOLOR(3)
Check Out this Related Man Page
IMAGETRUECOLORTOPALETTE(3) 1 IMAGETRUECOLORTOPALETTE(3)imagetruecolortopalette - Convert a true color image to a palette imageSYNOPSIS
bool imagetruecolortopalette (resource $image, bool $dither, int $ncolors)
DESCRIPTION imagetruecolortopalette(3) converts a truecolor image to a palette image. The code for this function was originally drawn from the Indepen-
dent JPEG Group library code, which is excellent. The code has been modified to preserve as much alpha channel information as possible in
the resulting palette, in addition to preserving colors as well as possible. This does not work as well as might be hoped. It is usually
best to simply produce a truecolor output image instead, which guarantees the highest output quality.
PARAMETERS
o $
image -An image resource, returned by one of the image creation functions, such as imagecreatetruecolor(3).
o $dither
- Indicates if the image should be dithered - if it is TRUE then dithering will be used which will result in a more speckled image
but with better color approximation.
o $ncolors
- Sets the maximum number of colors that should be retained in the palette.
RETURN VALUES
Returns TRUE on success or FALSE on failure.
EXAMPLES
Example #1
Converting a true color image to a palette-based image
<?php
// Create a new true color image
$im = imagecreatetruecolor(100, 100);
// Convert to palette-based with no dithering and 255 colors
imagetruecolortopalette($im, false, 255);
// Save the image
imagepng($im, './paletteimage.png');
imagedestroy($im);
?>
NOTES
Note
This function requires GD 2.0.1 or later (2.0.28 or later is recommended).
PHP Documentation Group IMAGETRUECOLORTOPALETTE(3)
Hi all! I am in need of some advice. I have a sco open server with NO redundancy. I am exploring different ways of trying to backup everything. Either to an image (ghost) or tape. Only problem is I dont know how. Using ghost in windows is pretty straight forward, but not know much about unix I... (1 Reply)
Hi,
My source file happens to be src.src with following contents:
1,liv 52,syrup,twice a day,children
When I do a :
for ii in `cat src.src`
do
echo $ii
medicine_name=`echo $ii | cut -f -d2","`
echo $medicine_name
done
I get output of
echo $medicine_name
as :
an the output of... (2 Replies)
Hi,
Please can anyone advise if Acronis true image can be used to take a image backup of the disk on sco unixware 7.1.4 and what version of software would I need to use this. The FS are vxfs. Would I need to power off the server before I can use this.
Thanks (1 Reply)