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MDL-11000 finally switching to png images with jpg fallback, based on code by Luigi Pinca :-)

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This commit is contained in:
Petr Skoda
2010-07-25 16:28:09 +00:00
parent 0972665f65
commit 2cc895aab7
2 changed files with 38 additions and 14 deletions
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lib/gdlib.php
+29 -10
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@@ -43,7 +43,7 @@ defined('MOODLE_INTERNAL') || die();
* @return bool
* @todo Finish documenting this function
*/
function ImageCopyBicubic ($dst_img, $src_img, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) {
function ImageCopyBicubic($dst_img, $src_img, $dst_x, $dst_y, $src_x, $src_y, $dst_w, $dst_h, $src_w, $src_h) {
global $CFG;
@@ -145,10 +145,34 @@ function process_new_icon($context, $component, $filearea, $itemid, $originalfil
return false;
}
if (function_exists('ImagePng')) {
$imagefnc = 'ImagePng';
$imageext = '.png';
$filters = PNG_NO_FILTER;
$quality = 1;
} else if (function_exists('ImageJpeg')) {
$imagefnc = 'ImageJpeg';
$imageext = '.jpg';
$filters = null; // not used
$quality = 90;
} else {
debugging('Jpeg and png not supported on this server, please fix server configuration');
return false;
}
if (function_exists('ImageCreateTrueColor') and $CFG->gdversion >= 2) {
$im1 = ImageCreateTrueColor(100,100);
$im2 = ImageCreateTrueColor(35,35);
if ($image->type == IMAGETYPE_PNG and $imagefnc === 'ImagePng') {
imagealphablending($im1, false);
$color = imagecolorallocatealpha($im1, 0, 0, 0, 127);
imagefill($im1, 0, 0, $color);
imagesavealpha($im1, true);
imagealphablending($im2, false);
$color = imagecolorallocatealpha($im2, 0, 0, 0, 127);
imagefill($im2, 0, 0, $color);
imagesavealpha($im2, true);
}
} else {
$im1 = ImageCreate(100,100);
$im2 = ImageCreate(35,35);
@@ -166,36 +190,31 @@ function process_new_icon($context, $component, $filearea, $itemid, $originalfil
ImageCopyBicubic($im1, $im, 0, 0, $cx-$half, $cy-$half, 100, 100, $half*2, $half*2);
ImageCopyBicubic($im2, $im, 0, 0, $cx-$half, $cy-$half, 35, 35, $half*2, $half*2);
if (!function_exists('ImageJpeg')) {
debugging('Jpeg not supported on this server, please fix server configuration');
return false;
}
$fs = get_file_storage();
$icon = array('contextid'=>$context->id, 'component'=>$component, 'filearea'=>$filearea, 'itemid'=>$itemid, 'filepath'=>'/');
ob_start();
if (!ImageJpeg($im1, NULL, 90)) {
if (!$imagefnc($im1, NULL, $quality, $filters)) {
// keep old icons
ob_end_clean();
return false;
}
$data = ob_get_clean();
ImageDestroy($im1);
$icon['filename'] = 'f1.jpg';
$icon['filename'] = 'f1'.$imageext;
$fs->delete_area_files($context->id, $component, $filearea, $itemid);
$fs->create_file_from_string($icon, $data);
ob_start();
if (!ImageJpeg($im2, NULL, 95)) {
if (!$imagefnc($im2, NULL, $quality, $filters)) {
ob_end_clean();
$fs->delete_area_files($context->id, $component, $filearea, $itemid);
return false;
}
$data = ob_get_clean();
ImageDestroy($im2);
$icon['filename'] = 'f2.jpg';
$icon['filename'] = 'f2'.$imageext;
$fs->create_file_from_string($icon, $data);
return true;