Can Coppermine do this: auto-adjusting background to image itself

[zeeforel]

Hi,

I am new here and have been looking around searching if Coppermine has functionality to auto-adjust the background of an image it displays to the most common color in the image.

I mean like this http://www.noahgrey.com/view.php?p=826&s=1

Anyone?

Many thanks in advance.

Best regards,
Marcel

[Tranz]

Coppermine doesn't have the functionality built in. Have you tried contacting the site owner to ask how it was done? There are probably multiple ways to achieve the effect.

[zeeforel]

Hi TranzNDance

I already contacted the site owner, but he did not tell me how it was done, only that it is part of some private script. Anyway, I have just asked him again.

Would it be nice to have this functionality in Coppermine? How do you think to can be done then? Is there a script that will do the "background-to-image matching"?

Thanks.

Marcel

[Tranz]

I think it would need to be done with the image libraries (GD, Imagemagick) that Coppermine uses. I'm not familiar with the image libraries enough to know if it's possible for them to output the hex value of the dominant color of an image file. If it is possible, then it should be pretty easy to put that into the css style for the body.

Although this would be a nice mod to have available, it's not something that would/should be added to the core.

[Tranz]

I've come up with a simple method of selecting 3 random points and averaging the rgb values. I'm not sure if averaging rgb value is the right thing to do but oh well. You can play with the math to select particular points and/or more of them. Also, instead of changing the body color, I've set it to change the canvas color (display_media).

Here's the code to put into your theme's theme.php:

Code Select Expand

function theme_html_picture()
{
    global $CONFIG, $CURRENT_PIC_DATA, $CURRENT_ALBUM_DATA, $USER;
    global $album, $comment_date_fmt, $template_display_media;
    global $lang_display_image_php, $lang_picinfo;

    $pid = $CURRENT_PIC_DATA['pid'];
    $pic_title = '';

    if (!isset($USER['liv']) || !is_array($USER['liv'])) {
        $USER['liv'] = array();
    }
    // Add 1 to hit counter
    if (!USER_IS_ADMIN && !in_array($pid, $USER['liv']) && isset($_COOKIE[$CONFIG['cookie_name'] . '_data'])) {
        add_hit($pid);
        if (count($USER['liv']) > 4) array_shift($USER['liv']);
        array_push($USER['liv'], $pid);
    }

    if($CONFIG['thumb_use']=='ht' && $CURRENT_PIC_DATA['pheight'] > $CONFIG['picture_width'] ){ // The wierd comparision is because only picture_width is stored
      $condition = true;
    }elseif($CONFIG['thumb_use']=='wd' && $CURRENT_PIC_DATA['pwidth'] > $CONFIG['picture_width']){
      $condition = true;
    }elseif($CONFIG['thumb_use']=='any' && max($CURRENT_PIC_DATA['pwidth'], $CURRENT_PIC_DATA['pheight']) > $CONFIG['picture_width']){
      $condition = true;
    }else{
     $condition = false;
    }

    if ($CURRENT_PIC_DATA['title'] != '') {
        $pic_title .= $CURRENT_PIC_DATA['title'] . "\n";
    }
    if ($CURRENT_PIC_DATA['caption'] != '') {
        $pic_title .= $CURRENT_PIC_DATA['caption'] . "\n";
    }
    if ($CURRENT_PIC_DATA['keywords'] != '') {
        $pic_title .= $lang_picinfo['Keywords'] . ": " . $CURRENT_PIC_DATA['keywords'];
    }

    if (!$CURRENT_PIC_DATA['title'] && !$CURRENT_PIC_DATA['caption']) {
        template_extract_block($template_display_media, 'img_desc');
    } else {
        if (!$CURRENT_PIC_DATA['title']) {
            template_extract_block($template_display_media, 'title');
        }
        if (!$CURRENT_PIC_DATA['caption']) {
            template_extract_block($template_display_media, 'caption');
        }
    }

    $CURRENT_PIC_DATA['menu'] = html_picture_menu(); //((USER_ADMIN_MODE && $CURRENT_ALBUM_DATA['category'] == FIRST_USER_CAT + USER_ID) || ($CONFIG['users_can_edit_pics'] && $CURRENT_PIC_DATA['owner_id'] == USER_ID && USER_ID != 0) || GALLERY_ADMIN_MODE) ? html_picture_menu($pid) : '';

    if ($CONFIG['make_intermediate'] && $condition ) {
        $picture_url = get_pic_url($CURRENT_PIC_DATA, 'normal');
    } else {
        $picture_url = get_pic_url($CURRENT_PIC_DATA, 'fullsize');
    }
    $image_size = compute_img_size($CURRENT_PIC_DATA['pwidth'], $CURRENT_PIC_DATA['pheight'], $CONFIG['picture_width']);

/* CODE FOR GD AUTO-ADJUSTING BACKGROUND */
$im = imagecreatefromjpeg(urldecode($picture_url));
$im_size = getimagesize(urldecode($picture_url));

$im_width = $im_size[0];
$im_height = $im_size[1];
// get a color
$start_x = rand(0,$im_width);
$start_y = rand(0,$im_height);
$color_index = imagecolorat($im, $start_x, $start_y);

// get a color
$start_x2 = rand(0,$im_width);
$start_y2 = rand(0,$im_height);
$color_index2 = imagecolorat($im, $start_x2, $start_y2);

// get a color
$start_x3 = rand(0,$im_width);
$start_y3 = rand(0,$im_height);
$color_index3 = imagecolorat($im, $start_x3, $start_y3);

// make it human readable
$color_tran = imagecolorsforindex($im, $color_index);
// make it human readable
$color_tran2 = imagecolorsforindex($im, $color_index2);
// make it human readable
$color_tran3 = imagecolorsforindex($im, $color_index3);

// what is it ?
$red = $color_tran[red];
$green = $color_tran[green];
$blue = $color_tran[blue];
$red2 = $color_tran2[red];
$green2 = $color_tran2[green];
$blue2 = $color_tran2[blue];
$css_red = round(($red + $red2 + $red3)/3);
$css_green = round(($green + $green2 + $green3)/3);
$css_blue = round(($blue + $blue2 + $blue3)/3);

    $pic_title = '';
    $mime_content = cpg_get_type($CURRENT_PIC_DATA['filename']);


    if ($mime_content['content']=='movie' || $mime_content['content']=='audio') {

        if ($CURRENT_PIC_DATA['pwidth']==0 || $CURRENT_PIC_DATA['pheight']==0) {
            $CURRENT_PIC_DATA['pwidth']  = 320; // Default width

            // Set default height; if file is a movie
            if ($mime_content['content']=='movie') {
                $CURRENT_PIC_DATA['pheight'] = 240; // Default height
            }
        }

        $ctrl_offset['mov']=15;
        $ctrl_offset['wmv']=45;
        $ctrl_offset['swf']=0;
        $ctrl_offset['rm']=0;
        $ctrl_offset_default=45;
        $ctrl_height = (isset($ctrl_offset[$mime_content['extension']]))?($ctrl_offset[$mime_content['extension']]):$ctrl_offset_default;
        $image_size['whole']='width="'.$CURRENT_PIC_DATA['pwidth'].'" height="'.($CURRENT_PIC_DATA['pheight']+$ctrl_height).'"';
    }

    if ($mime_content['content']=='image') {
        if (isset($image_size['reduced'])) {
            $winsizeX = $CURRENT_PIC_DATA['pwidth']+5;  //the +'s are the mysterious FF and IE paddings
            $winsizeY = $CURRENT_PIC_DATA['pheight']+3; //the +'s are the mysterious FF and IE paddings
            $pic_html = "<a href=\"javascript:;\" onclick=\"MM_openBrWindow('displayimage.php?pid=$pid&amp;fullsize=1','" . uniqid(rand()) . "','scrollbars=yes,toolbar=no,status=no,resizable=yes,width=$winsizeX,height=$winsizeY')\">";
            $pic_title = $lang_display_image_php['view_fs'] . "\n==============\n" . $pic_title;
            $pic_html .= "<img src=\"" . $picture_url . "\" class=\"image\" border=\"0\" alt=\"{$lang_display_image_php['view_fs']}\" /><br />";
            $pic_html .= "</a>\n";
        } else {
            $pic_html = "<img src=\"" . $picture_url . "\" {$image_size['geom']} class=\"image\" border=\"0\" alt=\"\" /><br />\n";
        }
    } elseif ($mime_content['content']=='document') {
        $pic_thumb_url = get_pic_url($CURRENT_PIC_DATA,'thumb');
        $pic_html = "<a href=\"{$picture_url}\" target=\"_blank\" class=\"document_link\"><img src=\"".$pic_thumb_url."\" border=\"0\" class=\"image\" /></a>\n<br />";
    } else {
        $autostart = ($CONFIG['media_autostart']) ? ('true'):('false');

        $players['WMP'] = array('id' => 'MediaPlayer',
                                'clsid' => 'classid="clsid:6BF52A52-394A-11d3-B153-00C04F79FAA6" ',
                                'codebase' => 'codebase="http://activex.microsoft.com/activex/controls/mplayer/en/nsmp2inf.cab#Version=5,1,52,701" ',
                                'mime' => 'type="application/x-mplayer2" ',
                               );
        $players['RMP'] = array('id' => 'RealPlayer',
                                'clsid' => 'classid="clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA" ',
                                'codebase' => '',
                                'mime' => 'type="audio/x-pn-realaudio-plugin" '
                               );
        $players['QT']  = array('id' => 'QuickTime',
                                'clsid' => 'classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B" ',
                                'codebase' => 'codebase="http://www.apple.com/qtactivex/qtplugin.cab" ',
                                'mime' => 'type="video/x-quicktime" '
                               );
        $players['SWF'] = array('id' => 'SWFlash',
                                'clsid' => ' classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" ',
                                'codebase' => 'codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0" ',
                                'mime' => 'type="application/x-shockwave-flash" '
                               );
        $players['UNK'] = array('id' => 'DefaultPlayer',
                                'clsid' => '',
                                'codebase' => '',
                                'mime' => ''
                               );

        if (isset($_COOKIE[$CONFIG['cookie_name'].'_'.$mime_content['extension'].'player'])) {
            $user_player = $_COOKIE[$CONFIG['cookie_name'].'_'.$mime_content['extension'].'player'];
        } else {
            $user_player = $mime_content['player'];
        }


                // There isn't a player selected or user wants client-side control
        if (!$user_player) {
            $user_player = 'UNK';
        }

        $player = $players[$user_player];

        $pic_html  = '<object id="'.$player['id'].'" '.$player['clsid'].$player['codebase'].$player['mime'].$image_size['whole'].'>';
        $pic_html .= "<param name=\"autostart\" value=\"$autostart\" /><param name=\"src\" value=\"". $picture_url . "\" />";
        $pic_html .= '<embed '.$image_size['whole'].' src="'. $picture_url . '" autostart="'.$autostart.'" '.$player['mime'].'></embed>';
        $pic_html .= "</object><br />\n";
    }

    $CURRENT_PIC_DATA['html'] = $pic_html;
    $CURRENT_PIC_DATA['header'] = '';
    $CURRENT_PIC_DATA['footer'] = '';

    $CURRENT_PIC_DATA = CPGPluginAPI::filter('file_data',$CURRENT_PIC_DATA);

    $params = array('{CELL_HEIGHT}' => '100',
        '{IMAGE}' => $CURRENT_PIC_DATA['header'].$CURRENT_PIC_DATA['html'].$CURRENT_PIC_DATA['footer'],
        '{ADMIN_MENU}' => $CURRENT_PIC_DATA['menu'],
        '{TITLE}' => bb_decode($CURRENT_PIC_DATA['title']),
        '{CAPTION}' => bb_decode(process_smilies($CURRENT_PIC_DATA['caption'])),
'{BG_COLOR}' => "$css_red,$css_green,$css_blue",
        );

    return template_eval($template_display_media, $params);
}
$template_display_media = <<<EOT
        <tr>
                <td align="center" class="display_media" nowrap="nowrap" style="background-color:rgb({BG_COLOR})">
                        <table cellspacing="2" cellpadding="0" class="imageborder">
                                <tr>
                                        <td align="center">
                                                {IMAGE}

                                        </td>
                                </tr>
                        </table>
                </td></tr>
                <tr><td>
                                                <table width="100%" cellspacing="2" cellpadding="0" class="tableb">
                                <tr>
                                        <td align="center">

                                                {ADMIN_MENU}
                                        </td>
                                </tr>
                        </table>





<!-- BEGIN img_desc -->
                        <table cellpadding="0" cellspacing="0" class="tableb" width="100%">
<!-- BEGIN title -->
                                <tr>
                                        <td class="tableb"><center><b>
                                                {TITLE}
                                        </b></center></td>
                                </tr>
<!-- END title -->
<!-- BEGIN caption -->
                                <tr>
                                        <td class="tableb"><center>
                                                {CAPTION}
                                        </center></td>
                                </tr>
<!-- END caption -->
                        </table>
<!-- END img_desc -->
                </td>
        </tr>

EOT;


Look for /* CODE FOR GD AUTO-ADJUSTING BACKGROUND */

Probably the best thing to do is create a for loop that samples a greater number of points and finds the color values that occur most frequently.

[Tranz]

Here's the improved version:
* samples hundreds of points ($n). adjust $n by adjusting $sample_factor
* it doesn't average the color values; instead, picks the most common color in a random sample. This means the color can change based on the random sampling
* ignores image borders to reduce noise
* doesn't separate the color points into rgb (which made things buggy)
* changes bg color for image displays only

demo: http://takethu.com/displayimage.php?album=17&pos=0&theme=thu_dark

Code Select Expand

function theme_html_picture()
{
    global $CONFIG, $CURRENT_PIC_DATA, $CURRENT_ALBUM_DATA, $USER;
    global $album, $comment_date_fmt, $template_display_media;
    global $lang_display_image_php, $lang_picinfo;

    $pid = $CURRENT_PIC_DATA['pid'];
    $pic_title = '';

    if (!isset($USER['liv']) || !is_array($USER['liv'])) {
        $USER['liv'] = array();
    }
    // Add 1 to hit counter
    if (!USER_IS_ADMIN && !in_array($pid, $USER['liv']) && isset($_COOKIE[$CONFIG['cookie_name'] . '_data'])) {
        add_hit($pid);
        if (count($USER['liv']) > 4) array_shift($USER['liv']);
        array_push($USER['liv'], $pid);
    }

    if($CONFIG['thumb_use']=='ht' && $CURRENT_PIC_DATA['pheight'] > $CONFIG['picture_width'] ){ // The wierd comparision is because only picture_width is stored
      $condition = true;
    }elseif($CONFIG['thumb_use']=='wd' && $CURRENT_PIC_DATA['pwidth'] > $CONFIG['picture_width']){
      $condition = true;
    }elseif($CONFIG['thumb_use']=='any' && max($CURRENT_PIC_DATA['pwidth'], $CURRENT_PIC_DATA['pheight']) > $CONFIG['picture_width']){
      $condition = true;
    }else{
     $condition = false;
    }

    if ($CURRENT_PIC_DATA['title'] != '') {
        $pic_title .= $CURRENT_PIC_DATA['title'] . "\n";
    }
    if ($CURRENT_PIC_DATA['caption'] != '') {
        $pic_title .= $CURRENT_PIC_DATA['caption'] . "\n";
    }
    if ($CURRENT_PIC_DATA['keywords'] != '') {
        $pic_title .= $lang_picinfo['Keywords'] . ": " . $CURRENT_PIC_DATA['keywords'];
    }

    if (!$CURRENT_PIC_DATA['title'] && !$CURRENT_PIC_DATA['caption']) {
        template_extract_block($template_display_media, 'img_desc');
    } else {
        if (!$CURRENT_PIC_DATA['title']) {
            template_extract_block($template_display_media, 'title');
        }
        if (!$CURRENT_PIC_DATA['caption']) {
            template_extract_block($template_display_media, 'caption');
        }
    }

    $CURRENT_PIC_DATA['menu'] = html_picture_menu(); //((USER_ADMIN_MODE && $CURRENT_ALBUM_DATA['category'] == FIRST_USER_CAT + USER_ID) || ($CONFIG['users_can_edit_pics'] && $CURRENT_PIC_DATA['owner_id'] == USER_ID && USER_ID != 0) || GALLERY_ADMIN_MODE) ? html_picture_menu($pid) : '';

    if ($CONFIG['make_intermediate'] && $condition ) {
        $picture_url = get_pic_url($CURRENT_PIC_DATA, 'normal');
    } else {
        $picture_url = get_pic_url($CURRENT_PIC_DATA, 'fullsize');
    }
    $image_size = compute_img_size($CURRENT_PIC_DATA['pwidth'], $CURRENT_PIC_DATA['pheight'], $CONFIG['picture_width']);

    $pic_title = '';
    $mime_content = cpg_get_type($CURRENT_PIC_DATA['filename']);


    if ($mime_content['content']=='movie' || $mime_content['content']=='audio') {

        if ($CURRENT_PIC_DATA['pwidth']==0 || $CURRENT_PIC_DATA['pheight']==0) {
            $CURRENT_PIC_DATA['pwidth']  = 320; // Default width

            // Set default height; if file is a movie
            if ($mime_content['content']=='movie') {
                $CURRENT_PIC_DATA['pheight'] = 240; // Default height
            }
        }

        $ctrl_offset['mov']=15;
        $ctrl_offset['wmv']=45;
        $ctrl_offset['swf']=0;
        $ctrl_offset['rm']=0;
        $ctrl_offset_default=45;
        $ctrl_height = (isset($ctrl_offset[$mime_content['extension']]))?($ctrl_offset[$mime_content['extension']]):$ctrl_offset_default;
        $image_size['whole']='width="'.$CURRENT_PIC_DATA['pwidth'].'" height="'.($CURRENT_PIC_DATA['pheight']+$ctrl_height).'"';
    }

$bg_color = '';
    if ($mime_content['content']=='image') {
/* CODE FOR GD AUTO-ADJUSTING BACKGROUND */

$im = imagecreatefromjpeg(urldecode($picture_url));
$im_size = getimagesize(urldecode($picture_url));
$im_width = $im_size[0];
$im_height = $im_size[1];
$sample_factor = 240; #increase this to lower n; decrease to increase n
$n = round(($im_width*$im_height)/$sample_factor); #the sample size is proportional to the image size
function rgb2html($r, $g=-1, $b=-1)
/*from: http://www.anyexample.com/programming/php/php_convert_rgb_from_to_html_hex_color.xml*/
{
if (is_array($r) && sizeof($r) == 3)
list($r, $g, $b) = $r;

$r = intval($r); $g = intval($g);
$b = intval($b);

$r = dechex($r<0?0:($r>255?255:$r));
$g = dechex($g<0?0:($g>255?255:$g));
$b = dechex($b<0?0:($b>255?255:$b));

$color = (strlen($r) < 2?'0':'').$r;
$color .= (strlen($g) < 2?'0':'').$g;
$color .= (strlen($b) < 2?'0':'').$b;
return $color;
}
for ($i = 1; $i <= $n; $i++) {
// get a color
$start_x = rand($im_width*.2,$im_width-(2*$im_width*.2));
$start_y = rand($im_height*.1,$im_height-(2*$im_height*.2));
$color_index = imagecolorat($im, $start_x, $start_y);
// make it human readable
$color_tran = imagecolorsforindex($im, $color_index);
// convert rgb to hex
$color = rgb2html($color_tran[red],$color_tran[green],$color_tran[blue]);
if ($color != '000000' && !strstr($color,'ff')) {
$colors[] = $color;
}
}
$color_count = array_count_values($colors);
arsort($color_count);
$color_keys = array_keys($color_count);
$color_mode = array_slice($color_keys,0,1);
$hex_color = "#$color_mode[0]";
$bg_color = 'style="background-color:'.$hex_color.'"';

        if (isset($image_size['reduced'])) {
            $winsizeX = $CURRENT_PIC_DATA['pwidth']+5;  //the +'s are the mysterious FF and IE paddings
            $winsizeY = $CURRENT_PIC_DATA['pheight']+3; //the +'s are the mysterious FF and IE paddings
            $pic_html = "<a href=\"javascript:;\" onclick=\"MM_openBrWindow('displayimage.php?pid=$pid&amp;fullsize=1','" . uniqid(rand()) . "','scrollbars=yes,toolbar=no,status=no,resizable=yes,width=$winsizeX,height=$winsizeY')\">";
            $pic_title = $lang_display_image_php['view_fs'] . "\n==============\n" . $pic_title;
            $pic_html .= "<img src=\"" . $picture_url . "\" class=\"image\" border=\"0\" alt=\"{$lang_display_image_php['view_fs']}\" /><br />";
            $pic_html .= "</a>\n";
        } else {
            $pic_html = "<img src=\"" . $picture_url . "\" {$image_size['geom']} class=\"image\" border=\"0\" alt=\"\" /><br />\n";
        }
    } elseif ($mime_content['content']=='document') {
        $pic_thumb_url = get_pic_url($CURRENT_PIC_DATA,'thumb');
        $pic_html = "<a href=\"{$picture_url}\" target=\"_blank\" class=\"document_link\"><img src=\"".$pic_thumb_url."\" border=\"0\" class=\"image\" /></a>\n<br />";
    } else {
        $autostart = ($CONFIG['media_autostart']) ? ('true'):('false');

        $players['WMP'] = array('id' => 'MediaPlayer',
                                'clsid' => 'classid="clsid:6BF52A52-394A-11d3-B153-00C04F79FAA6" ',
                                'codebase' => 'codebase="http://activex.microsoft.com/activex/controls/mplayer/en/nsmp2inf.cab#Version=5,1,52,701" ',
                                'mime' => 'type="application/x-mplayer2" ',
                               );
        $players['RMP'] = array('id' => 'RealPlayer',
                                'clsid' => 'classid="clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA" ',
                                'codebase' => '',
                                'mime' => 'type="audio/x-pn-realaudio-plugin" '
                               );
        $players['QT']  = array('id' => 'QuickTime',
                                'clsid' => 'classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B" ',
                                'codebase' => 'codebase="http://www.apple.com/qtactivex/qtplugin.cab" ',
                                'mime' => 'type="video/x-quicktime" '
                               );
        $players['SWF'] = array('id' => 'SWFlash',
                                'clsid' => ' classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" ',
                                'codebase' => 'codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0" ',
                                'mime' => 'type="application/x-shockwave-flash" '
                               );
        $players['UNK'] = array('id' => 'DefaultPlayer',
                                'clsid' => '',
                                'codebase' => '',
                                'mime' => ''
                               );

        if (isset($_COOKIE[$CONFIG['cookie_name'].'_'.$mime_content['extension'].'player'])) {
            $user_player = $_COOKIE[$CONFIG['cookie_name'].'_'.$mime_content['extension'].'player'];
        } else {
            $user_player = $mime_content['player'];
        }


                // There isn't a player selected or user wants client-side control
        if (!$user_player) {
            $user_player = 'UNK';
        }

        $player = $players[$user_player];

        $pic_html  = '<object id="'.$player['id'].'" '.$player['clsid'].$player['codebase'].$player['mime'].$image_size['whole'].'>';
        $pic_html .= "<param name=\"autostart\" value=\"$autostart\" /><param name=\"src\" value=\"". $picture_url . "\" />";
        $pic_html .= '<embed '.$image_size['whole'].' src="'. $picture_url . '" autostart="'.$autostart.'" '.$player['mime'].'></embed>';
        $pic_html .= "</object><br />\n";
    }

    $CURRENT_PIC_DATA['html'] = $pic_html;
    $CURRENT_PIC_DATA['header'] = '';
    $CURRENT_PIC_DATA['footer'] = '';

    $CURRENT_PIC_DATA = CPGPluginAPI::filter('file_data',$CURRENT_PIC_DATA);

    $params = array('{CELL_HEIGHT}' => '100',
        '{IMAGE}' => $CURRENT_PIC_DATA['header'].$CURRENT_PIC_DATA['html'].$CURRENT_PIC_DATA['footer'],
        '{ADMIN_MENU}' => $CURRENT_PIC_DATA['menu'],
        '{TITLE}' => bb_decode($CURRENT_PIC_DATA['title']),
        '{CAPTION}' => bb_decode(process_smilies($CURRENT_PIC_DATA['caption'])),
'{BG_COLOR}' => $bg_color,
        );

    return template_eval($template_display_media, $params);
}
$template_display_media = <<<EOT
        <tr>
                <td align="center" class="display_media" nowrap="nowrap" {BG_COLOR}>
                        <table cellspacing="2" cellpadding="0" class="imageborder">
                                <tr>
                                        <td align="center">
                                                {IMAGE}

                                        </td>
                                </tr>
                        </table>
                </td></tr>
                <tr><td>
                                                <table width="100%" cellspacing="2" cellpadding="0" class="tableb">
                                <tr>
                                        <td align="center">

                                                {ADMIN_MENU}
                                        </td>
                                </tr>
                        </table>





<!-- BEGIN img_desc -->
                        <table cellpadding="0" cellspacing="0" class="tableb" width="100%">
<!-- BEGIN title -->
                                <tr>
                                        <td class="tableb"><center><b>
                                                {TITLE}
                                        </b></center></td>
                                </tr>
<!-- END title -->
<!-- BEGIN caption -->
                                <tr>
                                        <td class="tableb"><center>
                                                {CAPTION}
                                        </center></td>
                                </tr>
<!-- END caption -->
                        </table>
<!-- END img_desc -->
                </td>
        </tr>

EOT;




[Stramm]

Code Select Expand

<?php
$img = @imagecreatefromjpeg("i:/test.jpg");
$newimg = ImageCreateTruecolor(1, 1);
ImageCopyResampled ($newimg, $img, 0, 0, 0, 0, 1, 1, ImageSX($img),ImageSY($img));

$color = imagecolorsforindex($newimg,imagecolorat($newimg,0,0));
var_dump($color);
?>

[zeeforel]

Hi TranzNDance,

You did it! Look's great. Will definitely try it out.

Many thanks.

Best regards,
Marcel

[zeeforel]

@Stramm,

I do not understand what your small code means in relation to the big chunk of code provided by TranzNDance. Did you improve part of it?

By the way, should I install a specific library to use all of this or is is standard PHP (this question concerns both code blocks)?

Many thanks.

Best regards,
Marcel

[Tranz]

You'll need to have GD2, which you can't install yourself unless you manage the server yourself. You can check for GD in phpinfo under Admin Tools to confirm you have it. If Coppermine was able to generate thumbnails, you have GD unless you're using Imagemagick.

[Stramm]

I do not understand what your small code means

means you don't need to sample the orig image a bunch of times. If you create a new 1x1 image  (1 line) and copy the orig into that new image (1 line), then the new image averages the colors of the orig. You can read that color (1 line)

However I haven't put that sample into coppermine code. It's a standalone demo. You neee to replace i:/test.jpg with a path to a pic on your box

[Tranz]

Thanks for explaining what the code does, Stramm.

Here's the version of the code that implements it:

Code Select Expand

function theme_html_picture()
{
    global $CONFIG, $CURRENT_PIC_DATA, $CURRENT_ALBUM_DATA, $USER;
    global $album, $comment_date_fmt, $template_display_media;
    global $lang_display_image_php, $lang_picinfo;

    $pid = $CURRENT_PIC_DATA['pid'];
    $pic_title = '';

    if (!isset($USER['liv']) || !is_array($USER['liv'])) {
        $USER['liv'] = array();
    }
    // Add 1 to hit counter
    if (!USER_IS_ADMIN && !in_array($pid, $USER['liv']) && isset($_COOKIE[$CONFIG['cookie_name'] . '_data'])) {
        add_hit($pid);
        if (count($USER['liv']) > 4) array_shift($USER['liv']);
        array_push($USER['liv'], $pid);
    }

    if($CONFIG['thumb_use']=='ht' && $CURRENT_PIC_DATA['pheight'] > $CONFIG['picture_width'] ){ // The wierd comparision is because only picture_width is stored
      $condition = true;
    }elseif($CONFIG['thumb_use']=='wd' && $CURRENT_PIC_DATA['pwidth'] > $CONFIG['picture_width']){
      $condition = true;
    }elseif($CONFIG['thumb_use']=='any' && max($CURRENT_PIC_DATA['pwidth'], $CURRENT_PIC_DATA['pheight']) > $CONFIG['picture_width']){
      $condition = true;
    }else{
     $condition = false;
    }

    if ($CURRENT_PIC_DATA['title'] != '') {
        $pic_title .= $CURRENT_PIC_DATA['title'] . "\n";
    }
    if ($CURRENT_PIC_DATA['caption'] != '') {
        $pic_title .= $CURRENT_PIC_DATA['caption'] . "\n";
    }
    if ($CURRENT_PIC_DATA['keywords'] != '') {
        $pic_title .= $lang_picinfo['Keywords'] . ": " . $CURRENT_PIC_DATA['keywords'];
    }

    if (!$CURRENT_PIC_DATA['title'] && !$CURRENT_PIC_DATA['caption']) {
        template_extract_block($template_display_media, 'img_desc');
    } else {
        if (!$CURRENT_PIC_DATA['title']) {
            template_extract_block($template_display_media, 'title');
        }
        if (!$CURRENT_PIC_DATA['caption']) {
            template_extract_block($template_display_media, 'caption');
        }
    }

    $CURRENT_PIC_DATA['menu'] = html_picture_menu(); //((USER_ADMIN_MODE && $CURRENT_ALBUM_DATA['category'] == FIRST_USER_CAT + USER_ID) || ($CONFIG['users_can_edit_pics'] && $CURRENT_PIC_DATA['owner_id'] == USER_ID && USER_ID != 0) || GALLERY_ADMIN_MODE) ? html_picture_menu($pid) : '';

    if ($CONFIG['make_intermediate'] && $condition ) {
        $picture_url = get_pic_url($CURRENT_PIC_DATA, 'normal');
    } else {
        $picture_url = get_pic_url($CURRENT_PIC_DATA, 'fullsize');
    }
    $image_size = compute_img_size($CURRENT_PIC_DATA['pwidth'], $CURRENT_PIC_DATA['pheight'], $CONFIG['picture_width']);

    $pic_title = '';
    $mime_content = cpg_get_type($CURRENT_PIC_DATA['filename']);


    if ($mime_content['content']=='movie' || $mime_content['content']=='audio') {

        if ($CURRENT_PIC_DATA['pwidth']==0 || $CURRENT_PIC_DATA['pheight']==0) {
            $CURRENT_PIC_DATA['pwidth']  = 320; // Default width

            // Set default height; if file is a movie
            if ($mime_content['content']=='movie') {
                $CURRENT_PIC_DATA['pheight'] = 240; // Default height
            }
        }

        $ctrl_offset['mov']=15;
        $ctrl_offset['wmv']=45;
        $ctrl_offset['swf']=0;
        $ctrl_offset['rm']=0;
        $ctrl_offset_default=45;
        $ctrl_height = (isset($ctrl_offset[$mime_content['extension']]))?($ctrl_offset[$mime_content['extension']]):$ctrl_offset_default;
        $image_size['whole']='width="'.$CURRENT_PIC_DATA['pwidth'].'" height="'.($CURRENT_PIC_DATA['pheight']+$ctrl_height).'"';
    }

$bg_color = '';
    if ($mime_content['content']=='image') {
/* CODE FOR GD AUTO-ADJUSTING BACKGROUND */

$img = @imagecreatefromjpeg(urldecode($picture_url));
$im_size = getimagesize(urldecode($picture_url));
$im_width = $im_size[0];
$im_height = $im_size[1];

// leave out image edges
$start_x = $im_width*.2;
$start_y = $im_height*.1;
$end_x = $im_width-(2*$im_width*.2);
$end_y = $im_height-(2*$im_height*.2);

$newimg = ImageCreateTruecolor(1, 1);
ImageCopyResampled ($newimg, $img, 0, 0, $start_x, $start_y, 1, 1, $end_x, $end_y);
$color = imagecolorsforindex($newimg,imagecolorat($newimg,0,0));
function rgb2html($r, $g=-1, $b=-1)
/*from: http://www.anyexample.com/programming/php/php_convert_rgb_from_to_html_hex_color.xml*/
{
if (is_array($r) && sizeof($r) == 3)
list($r, $g, $b) = $r;

$r = intval($r); $g = intval($g);
$b = intval($b);

$r = dechex($r<0?0:($r>255?255:$r));
$g = dechex($g<0?0:($g>255?255:$g));
$b = dechex($b<0?0:($b>255?255:$b));

$color = (strlen($r) < 2?'0':'').$r;
$color .= (strlen($g) < 2?'0':'').$g;
$color .= (strlen($b) < 2?'0':'').$b;
return $color;
}
$color = rgb2html($color[red],$color[green],$color[blue]);
$bg_color = 'style="background-color:#'.$color.'"';

        if (isset($image_size['reduced'])) {
            $winsizeX = $CURRENT_PIC_DATA['pwidth']+5;  //the +'s are the mysterious FF and IE paddings
            $winsizeY = $CURRENT_PIC_DATA['pheight']+3; //the +'s are the mysterious FF and IE paddings
            $pic_html = "<a href=\"javascript:;\" onclick=\"MM_openBrWindow('displayimage.php?pid=$pid&amp;fullsize=1','" . uniqid(rand()) . "','scrollbars=yes,toolbar=no,status=no,resizable=yes,width=$winsizeX,height=$winsizeY')\">";
            $pic_title = $lang_display_image_php['view_fs'] . "\n==============\n" . $pic_title;
            $pic_html .= "<img src=\"" . $picture_url . "\" class=\"image\" border=\"0\" alt=\"{$lang_display_image_php['view_fs']}\" /><br />";
            $pic_html .= "</a>\n";
        } else {
            $pic_html = "<img src=\"" . $picture_url . "\" {$image_size['geom']} class=\"image\" border=\"0\" alt=\"\" /><br />\n";
        }
    } elseif ($mime_content['content']=='document') {
        $pic_thumb_url = get_pic_url($CURRENT_PIC_DATA,'thumb');
        $pic_html = "<a href=\"{$picture_url}\" target=\"_blank\" class=\"document_link\"><img src=\"".$pic_thumb_url."\" border=\"0\" class=\"image\" /></a>\n<br />";
    } else {
        $autostart = ($CONFIG['media_autostart']) ? ('true'):('false');

        $players['WMP'] = array('id' => 'MediaPlayer',
                                'clsid' => 'classid="clsid:6BF52A52-394A-11d3-B153-00C04F79FAA6" ',
                                'codebase' => 'codebase="http://activex.microsoft.com/activex/controls/mplayer/en/nsmp2inf.cab#Version=5,1,52,701" ',
                                'mime' => 'type="application/x-mplayer2" ',
                               );
        $players['RMP'] = array('id' => 'RealPlayer',
                                'clsid' => 'classid="clsid:CFCDAA03-8BE4-11cf-B84B-0020AFBBCCFA" ',
                                'codebase' => '',
                                'mime' => 'type="audio/x-pn-realaudio-plugin" '
                               );
        $players['QT']  = array('id' => 'QuickTime',
                                'clsid' => 'classid="clsid:02BF25D5-8C17-4B23-BC80-D3488ABDDC6B" ',
                                'codebase' => 'codebase="http://www.apple.com/qtactivex/qtplugin.cab" ',
                                'mime' => 'type="video/x-quicktime" '
                               );
        $players['SWF'] = array('id' => 'SWFlash',
                                'clsid' => ' classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" ',
                                'codebase' => 'codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0" ',
                                'mime' => 'type="application/x-shockwave-flash" '
                               );
        $players['UNK'] = array('id' => 'DefaultPlayer',
                                'clsid' => '',
                                'codebase' => '',
                                'mime' => ''
                               );

        if (isset($_COOKIE[$CONFIG['cookie_name'].'_'.$mime_content['extension'].'player'])) {
            $user_player = $_COOKIE[$CONFIG['cookie_name'].'_'.$mime_content['extension'].'player'];
        } else {
            $user_player = $mime_content['player'];
        }


                // There isn't a player selected or user wants client-side control
        if (!$user_player) {
            $user_player = 'UNK';
        }

        $player = $players[$user_player];

        $pic_html  = '<object id="'.$player['id'].'" '.$player['clsid'].$player['codebase'].$player['mime'].$image_size['whole'].'>';
        $pic_html .= "<param name=\"autostart\" value=\"$autostart\" /><param name=\"src\" value=\"". $picture_url . "\" />";
        $pic_html .= '<embed '.$image_size['whole'].' src="'. $picture_url . '" autostart="'.$autostart.'" '.$player['mime'].'></embed>';
        $pic_html .= "</object><br />\n";
    }

    $CURRENT_PIC_DATA['html'] = $pic_html;
    $CURRENT_PIC_DATA['header'] = '';
    $CURRENT_PIC_DATA['footer'] = '';

    $CURRENT_PIC_DATA = CPGPluginAPI::filter('file_data',$CURRENT_PIC_DATA);

    $params = array('{CELL_HEIGHT}' => '100',
        '{IMAGE}' => $CURRENT_PIC_DATA['header'].$CURRENT_PIC_DATA['html'].$CURRENT_PIC_DATA['footer'],
        '{ADMIN_MENU}' => $CURRENT_PIC_DATA['menu'],
        '{TITLE}' => bb_decode($CURRENT_PIC_DATA['title']),
        '{CAPTION}' => bb_decode(process_smilies($CURRENT_PIC_DATA['caption'])),
'{BG_COLOR}' => $bg_color,
        );

    return template_eval($template_display_media, $params);
}
$template_display_media = <<<EOT
        <tr>
                <td align="center" class="display_media" nowrap="nowrap" {BG_COLOR}>
                        <table cellspacing="2" cellpadding="0" class="imageborder">
                                <tr>
                                        <td align="center">
                                                {IMAGE}

                                        </td>
                                </tr>
                        </table>
                </td></tr>
                <tr><td>
                                                <table width="100%" cellspacing="2" cellpadding="0" class="tableb">
                                <tr>
                                        <td align="center">

                                                {ADMIN_MENU}
                                        </td>
                                </tr>
                        </table>





<!-- BEGIN img_desc -->
                        <table cellpadding="0" cellspacing="0" class="tableb" width="100%">
<!-- BEGIN title -->
                                <tr>
                                        <td class="tableb"><center><b>
                                                {TITLE}
                                        </b></center></td>
                                </tr>
<!-- END title -->
<!-- BEGIN caption -->
                                <tr>
                                        <td class="tableb"><center>
                                                {CAPTION}
                                        </center></td>
                                </tr>
<!-- END caption -->
                        </table>
<!-- END img_desc -->
                </td>
        </tr>

EOT;


[Joachim Müller]

Keep in mind though that this will burn a lot of cpu cycles. In an ideal world, you'd perform this only once during upload and store the average color in an additional column in the database.