watermark (solo testo) su immagine

[blekm]

partendo da qua

http://php.html.it/script/vedi/4508/...age-with-text/

watermark_text.example.php

<?php  

#################################################################################
# Watermark Image using Text script usage example
# For updates visit [url]http://www.zubrag.com/scripts/[/url]
#################################################################################

// Watermark text
$text = 'zubrag.com';

// Watermark text color, Hex format. Must start from #
$color = '#000000';

// Font name. Case sensitive (i.e. Arial not equals arial)
$font = 'arial.ttf';

// Font size
$font_size = '8';

// Angle for text rotation. For example 0 - horizontal, 90 - vertical
$angle = 90;

// Horizontal offset in pixels, from the right
$offset_x = 0;

// Vertical offset in pixels, from the bottom
$offset_y = 0;

// Shadow? true or false
$drop_shadow = true;

// Shadow color, Hex format. Must start from #
// This may help to make watermark text more distinguishable from image background
$shadow_color = '#909009';

// 1 - save as file on the server, 2 - output to browser, 3 - do both
$mode = 1;

// Images folder, must end with slash.
$images_folder = '/www/water/';

// Save watermarked images to this folder, must end with slash.
$destination_folder = '/www/water/dest/';

#################################################################################
#     END OF SETTINGS
#################################################################################

// Load functions for image watermarking
include("watermark_text.class.php");

// Watermark all the "jpg" files from images folder
// and save watermarked images into destination folder
foreach (glob($images_folder."*.jpg") as $filename)
{
  // Image path
  $imgpath = $filename;

  // Where to save watermarked image
  $imgdestpath = $destination_folder . basename($filename);

  // create class instance
  $img = new Zubrag_watermark($imgpath);

  // shadow params
  $img->setShadow($drop_shadow, $shadow_color);

  // font params
  $img->setFont($font, $font_size);

  // Apply watermark
  $img->ApplyWatermark($text, $color, $angle, $offset_x, $offset_y);

  // Save on server
  $img->SaveAsFile($imgdestpath);

  // Output to browser
  $img->Output();
  
  // release resources
  $img->Free();
}
?>

watermark_text.class.php

<?php  

#################################################################################
# Watermark Image with Text Class 1.0
#################################################################################
# For updates visit [url]http://www.zubrag.com/scripts/[/url]
#################################################################################
#
# REQUIREMENTS:
# PHP 4.0.6 and GD 2.0.1 or later
# May not work with GIFs if GD2 library installed on your server 
# does not support GIF functions in full
#
#################################################################################

class Zubrag_watermark {

  var $font = 'arial.ttf';
  var $font_size = 16;
  var $angle = 0;
  var $offset_x = 0;
  var $offset_y = 0;
  var $quality = 100;
  var $image_type = -1; // Image type: 1 = GIF, 2 = JPG, 3 = PNG
  var $force_image_type = -1; // Change image type? (-1 = same as original, 1 = GIF, 2 = JPG, 3 = PNG)
  var $save_to_file = true;
  var $drop_shadow = false;

  function Zubrag_watermark($image_path='') {
    $this->setImagePath($image_path);
  }

  function setImagePath($image_path) {
    $this->image_path = $image_path;
  }

  function setShadow($drop_shadow,$color='#606060') {
    $this->drop_shadow = $drop_shadow;
    $this->shadow_color = $color;
  }

  function setText($text, $color) {
    $this->text = $text;
    $this->color = $color;
  }

  function setAngle($angle) {
    $this->angle = $angle;
  }

  function setOffset($x, $y) {
    $this->offset_x = $x;
    $this->offset_y = $y;
  }

  function setFont($font, $size = 0) {
    if (!empty($font)) $this->font = $font;
    if ($size != 0) $this->font_size = $size;
  }

  function ImageCreateFromType($type,$filename) {
   $im = null;
   switch ($type) {
     case 1:
       $im = ImageCreateFromGif($filename);
       break;
     case 2:
       $im = ImageCreateFromJpeg($filename);
       break;
     case 3:
       $im = ImageCreateFromPNG($filename);
       break;
    }
    return $im;
  }

  function ApplyWatermark($text='', $color='', $angle=0, $offset_x=0, $offset_y=0) {

    $this->setText($text, $color);
    $this->setAngle($angle);
    $this->setOffset($offset_x, $offset_y);

    // Determine image size and type
    $size = getimagesize($this->image_path);
    $size_x = $size[0];
    $size_y = $size[1];
    $image_type = $size[2]; // 1 = GIF, 2 = JPG, 3 = PNG

    // Load image
    $this->image = $this->ImageCreateFromType($image_type, $this->image_path);
    
    // Translate color to decimal
    $color = sscanf($this->color, '#%2x%2x%2x');
    $color_r = $color[0];
    $color_g = $color[1];
    $color_b = $color[2];

    $this->image_type = ($this->force_image_type != -1 ? $this->force_image_type : $image_type);

    /* Calculate TTF text size */
    $ttfsize = imagettfbbox($this->font_size, $this->angle, $this->font, $this->text);
    
    // Add custom insets
    $ttfx = $this->offset_x + max($ttfsize[0],$ttfsize[2],$ttfsize[4],$ttfsize[6]);
    $ttfy = $this->offset_y + max($ttfsize[1],$ttfsize[3],$ttfsize[5],$ttfsize[7]);
    
    /* shadow */
    if ($this->drop_shadow) {
      // Translate color to decimal
      $scolor = sscanf($this->shadow_color, '#%2x%2x%2x');
      $scolor_r = $scolor[0];
      $scolor_g = $scolor[1];
      $scolor_b = $scolor[2];

      $text_color = imagecolorallocate($this->image, $scolor_r, $scolor_g, $scolor_b);
      imagettftext($this->image, $this->font_size, 
        $this->angle, // angle
        $size_x - $ttfx - 2, // left inset
        $size_y - $ttfy - 2, // top inset
        $text_color, $this->font , $this->text)
        or die('Cannot render TTF text.');
    }

    /* Render text */
    $text_color = imagecolorallocate($this->image, $color_r, $color_g, $color_b);
    imagettftext($this->image, $this->font_size, 
      $this->angle, // angle
      $size_x - $ttfx - 3, // left inset
      $size_y - $ttfy - 3, // top inset
      $text_color, $this->font , $this->text)
      or die('Cannot render TTF text.');

  } // ApplyWatermark

  function OutputImageInternal($im, $filename='') {
 
    $res = null;
 
    // ImageGIF is not included into some GD2 releases, so it might not work
    // output png if gifs are not supported
    if(($this->image_type == 1)  && !function_exists('imagegif')) $this->image_type = 3;

    switch ($this->image_type) {
      case 1:
        if ($this->save_to_file) {
          $res = ImageGIF($im,$filename);
        }
        else {
          header("Content-type: image/gif");
          $res = ImageGIF($im);
        }
        break;
      case 2:
        if ($this->save_to_file) {
          $res = ImageJPEG($im,$filename,$this->quality);
        }
        else {
          header("Content-type: image/jpeg");
          $res = ImageJPEG($im, NULL, $this->quality);
        }
        break;
      case 3:
        if (PHP_VERSION >= '5.1.2') {
          // Convert to PNG quality.
          // PNG quality: 0 (best quality, bigger file) to 9 (worst quality, smaller file)
          $quality = 9 - min( round($this->quality / 10), 9 );
          if ($this->save_to_file) {
            $res = ImagePNG($im, $filename, $quality);
          }
          else {
            header("Content-type: image/png");
            $res = ImagePNG($im, NULL, $quality);
          }
        }
        else {
          if ($this->save_to_file) {
            $res = ImagePNG($im, $filename);
          }
          else {
            header("Content-type: image/png");
            $res = ImagePNG($im);
          }
        }
        break;
    }
 
    return $res;
 
  }

  function Output() {
    $this->save_to_file = false;
    $this->OutputImageInternal($this->image);
  }

  function SaveAsFile($filename) {
    $this->save_to_file = true;
    $this->OutputImageInternal($this->image, $filename);
  }

  function Free() {
    imagedestroy($this->image);
  }

}
?>

non capisco perchè non mi entra in questo ciclo

foreach (glob($images_folder."*.jpg") as $filename)

var_dump di glob($images_folder."*.jpg"); mi dice array di 0 elementi, mentre io nella cartella /www/dest/ ho un immagine -> mare.jpg

qualche idea?

[blekm]

ho trovato una variante, che pare funzionare

<?

$SourceFile = 'mare.jpg';
$DestinationFile = 'mare-w.jpg';
$WaterMarkText = 'Copyright';

watermarkImage ($SourceFile, $WaterMarkText, $DestinationFile);

function watermarkImage ($SourceFile, $WaterMarkText, $DestinationFile) {
   list($width, $height) = getimagesize($SourceFile);
   $image_p = imagecreatetruecolor($width, $height);
   $image = imagecreatefromjpeg($SourceFile);
   imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width, $height);
   $black = imagecolorallocate($image_p, 0, 0, 0);
   $font = 'arial.ttf';
   $font_size = 14;
   imagettftext($image_p, $font_size, 0, 10, 20, $black, $font, $WaterMarkText);
   if ($DestinationFile<>'') {
      imagejpeg ($image_p, $DestinationFile, 100);
   } else {
      header('Content-Type: image/jpeg');
      imagejpeg($image_p, null, 100);
   };
   imagedestroy($image);
   imagedestroy($image_p);
};
?>

la domanda è

imagettftext($image_p, $font_size, 0, 10, 20, $black, $font, $WaterMarkText);

10 e 20 sono le coordinate, che partono dall'alto a sinistra... in questo modo la scritta è in alto a sinistra, se io la volessi in basso a destra? Non posso mettere una misura precisa, perchè se cambia la dimensione della foto mi salta tutto, no?

Esiste una maniera per far partire x e y dal basso in destrA?

qua non ho trovato niente che mi risolva questo dubbio http://it2.php.net/imagettftext

[brodik]

certo, basta che ti ricavi la larghezza e l'altezza dell'immagine in cui andrai ad applicare il watermark e gli sottrai i valori che vuoi..

[blekm]

hai ragione, non ci avevo pensato

proverò, grazie

[blekm]

sotto consiglio di brodik, ho ricavato le dimensioni dell'immagine a cui applicare il watermark, e dentro il codice modificato cosi

$height_diviso_2 = $height/2;
$width_diviso_2 = $width/2;

imagettftext($image_p, $font_size, 0, $width_diviso_2, $height_diviso_2, $white, $font, $WaterMarkText); 

però ho un problema. In verticale la scritta è sempre centrata, ma in orizzontale no.

Vorrei poter inserire una qualsiasi scritta di qualunque dimensione e lunghezza, e che questa sia sempre centrata anche in orizzontale (cioè a destra e sinistra stesso spazio), ora ottengo questi risultati





qualche idea?