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Use the blurhash when the remote picture doesn't load

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This commit is contained in:
Michael 2022-12-04 14:58:53 +00:00
parent a5be5b27e3
commit cfe5101b9b
3 changed files with 34 additions and 12 deletions
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8
src/Model/Photo.php
View file

@ -346,11 +346,14 @@ class Photo
* @param string $url Image URL
* @param int $uid User ID of the requesting person
* @param string $mimetype Image mime type. Is guessed by file name when empty.
* @param string $blurhash The blurhash that will be used to generate a picture when the original picture can't be fetched
* @param int $width Image width
* @param int $height Image height
*
* @return array
* @throws \Exception
*/
public static function createPhotoForExternalResource(string $url, int $uid = 0, string $mimetype = ''): array
public static function createPhotoForExternalResource(string $url, int $uid = 0, string $mimetype = '', string $blurhash = '', int $width = 0, int $height = 0): array
{
if (empty($mimetype)) {
$mimetype = Images::guessTypeByExtension($url);
@ -364,6 +367,9 @@ class Photo
$photo['backend-ref'] = json_encode(['url' => $url, 'uid' => $uid]);
$photo['type'] = $mimetype;
$photo['cacheable'] = true;
$photo['blurhash'] = $blurhash;
$photo['width'] = $width;
$photo['height'] = $height;
return $photo;
}

22
src/Module/Photo.php
View file

@ -153,8 +153,12 @@ class Photo extends BaseModule
$stamp = microtime(true);
$imgdata = MPhoto::getImageDataForPhoto($photo);
if (empty($imgdata)) {
if (empty($imgdata) && empty($photo['blurhash'])) {
throw new HTTPException\NotFoundException();
} elseif (empty($imgdata) && !empty($photo['blurhash'])) {
$image = New Image('', 'image/png');
$image->getFromBlurHash($photo['blurhash'], $photo['width'], $photo['height']);
$imgdata = $image->asString();
}
// The mimetype for an external or system resource can only be known reliably after it had been fetched
@ -240,14 +244,18 @@ class Photo extends BaseModule
{
switch($type) {
case 'preview':
$media = DBA::selectFirst('post-media', ['preview', 'url', 'mimetype', 'type', 'uri-id'], ['id' => $id]);
$media = DBA::selectFirst('post-media', ['preview', 'url', 'preview-height', 'preview-width', 'height', 'width', 'mimetype', 'type', 'uri-id', 'blurhash'], ['id' => $id]);
if (empty($media)) {
return false;
}
$url = $media['preview'];
$url = $media['preview'];
$width = $media['preview-width'];
$height = $media['preview-height'];
if (empty($url) && ($media['type'] == Post\Media::IMAGE)) {
$url = $media['url'];
$url = $media['url'];
$width = $media['width'];
$height = $media['height'];
}
if (empty($url)) {
@ -258,9 +266,9 @@ class Photo extends BaseModule
return MPhoto::getPhoto($matches[1], $matches[2]);
}
return MPhoto::createPhotoForExternalResource($url, (int)DI::userSession()->getLocalUserId(), $media['mimetype'] ?? '');
return MPhoto::createPhotoForExternalResource($url, (int)DI::userSession()->getLocalUserId(), $media['mimetype'] ?? '', $media['blurhash'], $width, $height);
case 'media':
$media = DBA::selectFirst('post-media', ['url', 'mimetype', 'uri-id'], ['id' => $id, 'type' => Post\Media::IMAGE]);
$media = DBA::selectFirst('post-media', ['url', 'height', 'width', 'mimetype', 'uri-id', 'blurhash'], ['id' => $id, 'type' => Post\Media::IMAGE]);
if (empty($media)) {
return false;
}
@ -269,7 +277,7 @@ class Photo extends BaseModule
return MPhoto::getPhoto($matches[1], $matches[2]);
}
return MPhoto::createPhotoForExternalResource($media['url'], (int)DI::userSession()->getLocalUserId(), $media['mimetype']);
return MPhoto::createPhotoForExternalResource($media['url'], (int)DI::userSession()->getLocalUserId(), $media['mimetype'], $media['blurhash'], $media['width'], $media['height']);
case 'link':
$link = DBA::selectFirst('post-link', ['url', 'mimetype'], ['id' => $id]);
if (empty($link)) {

16
src/Object/Image.php
View file

@ -780,13 +780,21 @@ class Image
return;
}
$pixels = Blurhash::decode($blurhash, $width, $height);
$this->image = imagecreatetruecolor($width, $height);
for ($y = 0; $y < $height; ++$y) {
for ($x = 0; $x < $width; ++$x) {
$scaled = Images::getScalingDimensions($width, $height, 90);
$pixels = Blurhash::decode($blurhash, $scaled['width'], $scaled['height']);
$this->image = imagecreatetruecolor($scaled['width'], $scaled['height']);
for ($y = 0; $y < $scaled['height']; ++$y) {
for ($x = 0; $x < $scaled['width']; ++$x) {
[$r, $g, $b] = $pixels[$y][$x];
imagesetpixel($this->image, $x, $y, imagecolorallocate($this->image, $r, $g, $b));
}
}
$this->width = imagesx($this->image);
$this->height = imagesy($this->image);
$this->valid = true;
$this->scaleUp(min($width, $height));
}
}