public function writeWatermarkInfo(&$sourcefileId, $thumbnailMode, CacheFile $cacheFile)
{
if (!$this->config->isUsedWatermark() || $thumbnailMode) {
return;
}
static $disable_alpha_warning;
$watermarkfile = $this->config->getWatermarkFile();
$align = $this->config->getWatermarkLeft();
$valign = $this->config->getWatermarkTop();
if ($this->config->getWatermarkTransparencyType() == 'alpha') {
$transcolor = FALSE;
} else {
$transcolor = $this->config->getWatermarkTransparentColor();
}
$transparency = $this->config->getWatermarkTransparency();
try {
$watermarkfile_id = $this->loadWatermarkFile($watermarkfile);
} catch (Exception $e) {
return false;
}
@imageAlphaBlending($watermarkfile_id, false);
$result = @imageSaveAlpha($watermarkfile_id, true);
if (!$result) {
if (!$disable_alpha_warning) {
$msg = "Watermark problem: your server does not support alpha blending (requires GD 2.0.1+)";
JLog::add($msg, JLog::WARNING);
}
$disable_alpha_warning = true;
imagedestroy($watermarkfile_id);
return false;
}
$offset_w = $cacheFile->offsetX();
$offset_h = $cacheFile->offsetY();
$w = $cacheFile->displayWidth();
$h = $cacheFile->displayHeight();
$watermarkfileWidth = imageSX($watermarkfile_id);
$watermarkfileHeight = imageSY($watermarkfile_id);
$watermarkOffsetX = $this->calcXOffsetForWatermark($align, $watermarkfileWidth, $offset_w, $w);
$watermarkOffsetY = $this->calcYOffsetForWatermark($valign, $watermarkfileHeight, $offset_h, $h);
$fileType = strtolower(pathinfo($watermarkfile, PATHINFO_EXTENSION));
$sourcefileId = $this->upsampleImageIfNecessary($fileType, $sourcefileId);
if ($transcolor !== false) {
$transcolAsInt = intval(str_replace('#', '', $transcolor), 16);
imagecolortransparent($watermarkfile_id, $transcolAsInt);
// use transparent color
imagecopymerge($sourcefileId, $watermarkfile_id, $watermarkOffsetX, $watermarkOffsetY, 0, 0, $watermarkfileWidth, $watermarkfileHeight, $transparency);
} else {
imagecopy($sourcefileId, $watermarkfile_id, $watermarkOffsetX, $watermarkOffsetY, 0, 0, $watermarkfileWidth, $watermarkfileHeight);
// True
// alphablend
}
imagedestroy($watermarkfile_id);
return true;
}
