function image_decal_couleur_127($coul, $val)
{
include_spip('filtres/images_lib');
return _image_decale_composante_127($coul, $val);
}
function image_sepia($im, $rgb = "896f5e")
{
include_spip('filtres/images_lib');
if (!function_exists("imagecreatetruecolor")) {
return $im;
}
$couleurs = _couleur_hex_to_dec($rgb);
$dr = $couleurs["red"];
$dv = $couleurs["green"];
$db = $couleurs["blue"];
$fonction = array('image_sepia', func_get_args());
$image = _image_valeurs_trans($im, "sepia-{$dr}-{$dv}-{$db}", false, $fonction);
if (!$image) {
return "";
}
$x_i = $image["largeur"];
$y_i = $image["hauteur"];
$im = $image["fichier"];
$dest = $image["fichier_dest"];
$creer = $image["creer"];
if ($creer) {
// Creation de l'image en deux temps
// de facon a conserver les GIF transparents
$im = $image["fonction_imagecreatefrom"]($im);
imagepalettetotruecolor($im);
$im_ = imagecreatetruecolor($x_i, $y_i);
@imagealphablending($im_, false);
@imagesavealpha($im_, true);
$color_t = ImageColorAllocateAlpha($im_, 255, 255, 255, 127);
imagefill($im_, 0, 0, $color_t);
imagecopy($im_, $im, 0, 0, 0, 0, $x_i, $y_i);
for ($x = 0; $x < $x_i; $x++) {
for ($y = 0; $y < $y_i; $y++) {
$rgb = ImageColorAt($im_, $x, $y);
$a = $rgb >> 24 & 0xff;
$r = $rgb >> 16 & 0xff;
$g = $rgb >> 8 & 0xff;
$b = $rgb & 0xff;
$r = round(0.299 * $r + 0.587 * $g + 0.114 * $b);
$g = $r;
$b = $r;
$r = _image_decale_composante_127($r, $dr);
$g = _image_decale_composante_127($g, $dv);
$b = _image_decale_composante_127($b, $db);
$color = ImageColorAllocateAlpha($im_, $r, $g, $b, $a);
imagesetpixel($im_, $x, $y, $color);
}
}
_image_gd_output($im_, $image);
imagedestroy($im_);
imagedestroy($im);
}
return _image_ecrire_tag($image, array('src' => $dest));
}
