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MDL-8855 - Wrote additional GD code to support alpha transparency in PNG files.

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This commit is contained in:
nicolasconnault 2007-03-13 02:40:18 +00:00
parent 86c4258a72
commit f7cec5cf56
1 changed files with 18 additions and 2 deletions

20
mod/data/field/picture/field.class.php

@ -246,6 +246,12 @@ class data_field_picture extends data_field_file {
} else {
$im1 = ImageCreate($thumbwidth,$thumbheight);
}
// Prevent alpha blending for PNG images
if ($image->type == 3) {
imagealphablending($im1, false);
}
$cx = $image->width / 2;
$cy = $image->height / 2;
@ -255,12 +261,22 @@ class data_field_picture extends data_field_file {
ImageCopyBicubic($im1, $im, 0, 0, $cx-$halfwidth, $cy-$halfheight,
$thumbwidth, $thumbheight, $halfwidth*2, $halfheight*2);
if (function_exists('ImageJpeg')) {
// Save alpha transparency for PNG images
if ($image->type == 3) {
imagesavealpha($im1, true);
}
if (function_exists('ImageJpeg') && $image->type != 3) {
@touch($thumbnaillocation); // Helps in Safe mode
if (ImageJpeg($im1, $thumbnaillocation, 90)) {
@chmod($thumbnaillocation, 0666);
}
} elseif (function_exists('ImagePng') && $image->type == 3) {
@touch($thumbnaillocation); // Helps in Safe mode
if (ImagePng($im1, $thumbnaillocation, 9)) {
@chmod($thumbnaillocation, 0666);
}
}
} else { // Try and remove the thumbnail - we don't want thumbnailing active