Closed galebnas closed 8 years ago
Hi This happens every time I post an issue on github (I find the solution) This is a PHP function that will convert base30 to png it is based on your 'jSignature_Tools_Base30.php'
<?php
require_once('jSignature_Tools_Base30.php');
function base30_to_jpeg($base30_string, $output_file) {
$data = str_replace('image/jsignature;base30,', '', $base30_string);
$converter = new jSignature_Tools_Base30();
$raw = $converter->Base64ToNative($data);
//Calculate dimensions
$width = 0;
$height = 0;
foreach($raw as $line)
{
if (max($line['x'])>$width)$width=max($line['x']);
if (max($line['y'])>$height)$height=max($line['y']);
}
// Create an image
$im = imagecreatetruecolor($width+20,$height+20);
// Save transparency for PNG
imagesavealpha($im, true);
// Fill background with transparency
$trans_colour = imagecolorallocatealpha($im, 255, 255, 255, 127);
imagefill($im, 0, 0, $trans_colour);
// Set pen thickness
imagesetthickness($im, 2);
// Set pen color to black
$black = imagecolorallocate($im, 0, 0, 0);
// Loop through array pairs from each signature word
for ($i = 0; $i < count($raw); $i++)
{
// Loop through each pair in a word
for ($j = 0; $j < count($raw[$i]['x']); $j++)
{
// Make sure we are not on the last coordinate in the array
if ( ! isset($raw[$i]['x'][$j]))
break;
if ( ! isset($raw[$i]['x'][$j+1]))
// Draw the dot for the coordinate
imagesetpixel ( $im, $raw[$i]['x'][$j], $raw[$i]['y'][$j], $black);
else
// Draw the line for the coordinate pair
imageline($im, $raw[$i]['x'][$j], $raw[$i]['y'][$j], $raw[$i]['x'][$j+1], $raw[$i]['y'][$j+1], $black);
}
}
//Create Image
$ifp = fopen($output_file, "wb");
imagepng($im, $output_file);
fclose($ifp);
imagedestroy($im);
return $output_file;
}
//test
$imgStr='image/jsignature;base30,7U010100010000000001_1G88b8ace99aab756856_bE2000000010000000101_1D6689cbaa9b956558564_8w757698987766566556545_3PZ2110101010100000000Y10_fF0000Z2100001000Y110_1V9789cb86966655475_fK_1x';
base30_to_jpeg($imgStr, 'test.png');
?>
Is there a way to prevent to save file to disk and display inline image with base64 encoding? (always from base30)
hello @galebnas i already implement you code,but for show image with id from database how??
Hi First thank you for this great plugin. everything is working perfectly I am storing the Signatures in the database using the base30 type witch is very good and small in size but unfortunately I cant find a way to convert it to PNG. do you have any php code to convert the base30 to png.
Note: I tried the SignatureDataConversion_PHP class in the extra folder but I didn't manage to understand it or utilize it, a small working sample code would be great Thanks again :)