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add transparency mode for png images #22

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add transparency mode for png images #22

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c73aa66
Add transparency feature for png files
pcr-coding Sep 16, 2014
06684a2
Add transparency example to demo page
pcr-coding Sep 16, 2014
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45 changes: 26 additions & 19 deletions index.php
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
<?php
<?php
/*
* PHP QR Code encoder
*
Expand All @@ -22,7 +22,7 @@
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/

echo "<h1>PHP QR Code</h1><hr/>";
echo "<h1>PHP QR Code</h1><hr/>";

//set it to writable location, a place for temp generated PNG files
$PNG_TEMP_DIR = dirname(__FILE__).DIRECTORY_SEPARATOR.'temp'.DIRECTORY_SEPARATOR;
Expand All @@ -34,7 +34,7 @@

//ofcourse we need rights to create temp dir
if (!file_exists($PNG_TEMP_DIR))
mkdir($PNG_TEMP_DIR);
mkdir($PNG_TEMP_DIR);


$filename = $PNG_TEMP_DIR.'test.png';
Expand All @@ -49,27 +49,33 @@
if (isset($_REQUEST['size']))
$matrixPointSize = min(max((int)$_REQUEST['size'], 1), 10);


$backTransparent = false;
if (isset($_REQUEST['back_transparent']))
$backTransparent = (bool) $_REQUEST['back_transparent'];


if (isset($_REQUEST['data'])) {

//it's very important!
if (trim($_REQUEST['data']) == '')
die('data cannot be empty! <a href="?">back</a>');

// user data
$filename = $PNG_TEMP_DIR.'test'.md5($_REQUEST['data'].'|'.$errorCorrectionLevel.'|'.$matrixPointSize).'.png';
QRcode::png($_REQUEST['data'], $filename, $errorCorrectionLevel, $matrixPointSize, 2);

$filename = $PNG_TEMP_DIR.'test'.md5($_REQUEST['data'].'|'.$errorCorrectionLevel.'|'.$matrixPointSize).'.png';
QRcode::png($_REQUEST['data'], $filename, $errorCorrectionLevel, $matrixPointSize, 2, false, 0xFFFFFF, 0x000000, $backTransparent);
} else {

//default data
echo 'You can provide data in GET parameter: <a href="?data=like_that">like that</a><hr/>';
QRcode::png('PHP QR Code :)', $filename, $errorCorrectionLevel, $matrixPointSize, 2);

}
//default data
echo 'You can provide data in GET parameter: <a href="?data=like_that">like that</a><hr/>';
QRcode::png('PHP QR Code :)', $filename, $errorCorrectionLevel, $matrixPointSize, 2, false, 0xFFFFFF, 0x000000, $backTransparent);

//display generated file
echo '<img src="'.$PNG_WEB_DIR.basename($filename).'" /><hr/>';
}

//display generated file
echo '<div style="background-color: #c097e0; padding: 1em;">
<img src="'.$PNG_WEB_DIR.basename($filename).'" />
</div><hr/>';

//config form
echo '<form action="index.php" method="post">
Expand All @@ -86,9 +92,10 @@
echo '<option value="'.$i.'"'.(($matrixPointSize==$i)?' selected':'').'>'.$i.'</option>';

echo '</select>&nbsp;
<input type="checkbox" name="back_transparent" value="backTransparent"'.(($backTransparent==true)?' checked':'').'> Transparent
<input type="submit" value="GENERATE"></form><hr/>';

// benchmark
QRtools::timeBenchmark();


// benchmark
QRtools::timeBenchmark();
9 changes: 5 additions & 4 deletions qrencode.php
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Original file line number Diff line number Diff line change
Expand Up @@ -280,9 +280,9 @@ public function encodeString($string, $version, $level, $hint, $casesensitive)
}

//----------------------------------------------------------------------
public static function png($text, $outfile = false, $level = QR_ECLEVEL_L, $size = 3, $margin = 4, $saveandprint=false, $back_color = 0xFFFFFF, $fore_color = 0x000000)
public static function png($text, $outfile = false, $level = QR_ECLEVEL_L, $size = 3, $margin = 4, $saveandprint=false, $back_color = 0xFFFFFF, $fore_color = 0x000000, $back_transparent = false)
{
$enc = QRencode::factory($level, $size, $margin, $back_color, $fore_color);
$enc = QRencode::factory($level, $size, $margin, $back_color, $fore_color, false, $back_transparent);
return $enc->encodePNG($text, $outfile, $saveandprint=false);
}

Expand Down Expand Up @@ -424,14 +424,15 @@ class QRencode {
public $hint = QR_MODE_8;

//----------------------------------------------------------------------
public static function factory($level = QR_ECLEVEL_L, $size = 3, $margin = 4, $back_color = 0xFFFFFF, $fore_color = 0x000000, $cmyk = false)
public static function factory($level = QR_ECLEVEL_L, $size = 3, $margin = 4, $back_color = 0xFFFFFF, $fore_color = 0x000000, $cmyk = false, $back_transparent = false)
{
$enc = new QRencode();
$enc->size = $size;
$enc->margin = $margin;
$enc->fore_color = $fore_color;
$enc->back_color = $back_color;
$enc->cmyk = $cmyk;
$enc->back_transparent = $back_transparent;

switch ($level.'') {
case '0':
Expand Down Expand Up @@ -510,7 +511,7 @@ public function encodePNG($intext, $outfile = false,$saveandprint=false)

$maxSize = (int)(QR_PNG_MAXIMUM_SIZE / (count($tab)+2*$this->margin));

QRimage::png($tab, $outfile, min(max(1, $this->size), $maxSize), $this->margin,$saveandprint, $this->back_color, $this->fore_color);
QRimage::png($tab, $outfile, min(max(1, $this->size), $maxSize), $this->margin,$saveandprint, $this->back_color, $this->fore_color, $this->back_transparent);

} catch (Exception $e) {

Expand Down
14 changes: 10 additions & 4 deletions qrimage.php
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Original file line number Diff line number Diff line change
Expand Up @@ -27,9 +27,9 @@
class QRimage {

//----------------------------------------------------------------------
public static function png($frame, $filename = false, $pixelPerPoint = 4, $outerFrame = 4,$saveandprint=FALSE, $back_color, $fore_color)
public static function png($frame, $filename = false, $pixelPerPoint = 4, $outerFrame = 4,$saveandprint=FALSE, $back_color, $fore_color, $back_transparent)
{
$image = self::image($frame, $pixelPerPoint, $outerFrame, $back_color, $fore_color);
$image = self::image($frame, $pixelPerPoint, $outerFrame, $back_color, $fore_color, $back_transparent);

if ($filename === false) {
Header("Content-type: image/png");
Expand Down Expand Up @@ -63,7 +63,7 @@ public static function jpg($frame, $filename = false, $pixelPerPoint = 8, $outer
}

//----------------------------------------------------------------------
private static function image($frame, $pixelPerPoint = 4, $outerFrame = 4, $back_color = 0xFFFFFF, $fore_color = 0x000000)
private static function image($frame, $pixelPerPoint = 4, $outerFrame = 4, $back_color = 0xFFFFFF, $fore_color = 0x000000, $back_transparent = false)
{
$h = count($frame);
$w = strlen($frame[0]);
Expand Down Expand Up @@ -100,8 +100,14 @@ private static function image($frame, $pixelPerPoint = 4, $outerFrame = 4, $back

$target_image =ImageCreate($imgW * $pixelPerPoint, $imgH * $pixelPerPoint);
ImageCopyResized($target_image, $base_image, 0, 0, 0, 0, $imgW * $pixelPerPoint, $imgH * $pixelPerPoint, $imgW, $imgH);

if ($back_transparent == true) {
$col[2] = imagecolorexact($target_image, $r2, $b2, $g2);
ImageColorTransparent($target_image, $col[2]);
}

ImageDestroy($base_image);

return $target_image;
}
}
}