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fix: generate favourite icon without imagick svg support #55132

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fix: generate favourite icon without imagick svg support #55132

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69057a5
fix: generate favourite icon without imagick svg support
SebastianKrupinski Sep 15, 2025
d2f2f62
fixup! fix: generate favourite icon without imagick svg support
SebastianKrupinski Dec 3, 2025
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20 changes: 14 additions & 6 deletions apps/theming/lib/Controller/IconController.php
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@
use OCP\AppFramework\Http\NotFoundResponse;
use OCP\AppFramework\Http\Response;
use OCP\Files\NotFoundException;
use OCP\IConfig;
use OCP\IRequest;

class IconController extends Controller {
Expand All @@ -30,6 +31,7 @@ class IconController extends Controller {
public function __construct(
$appName,
IRequest $request,
private IConfig $config,
private ThemingDefaults $themingDefaults,
private IconBuilder $iconBuilder,
private ImageManager $imageManager,
Expand Down Expand Up @@ -79,7 +81,7 @@ public function getThemedIcon(string $app, string $image): Response {
* Return a 32x32 favicon as png
*
* @param string $app ID of the app
* @return DataDisplayResponse<Http::STATUS_OK, array{Content-Type: 'image/x-icon'}>|FileDisplayResponse<Http::STATUS_OK, array{Content-Type: 'image/x-icon'}>|NotFoundResponse<Http::STATUS_NOT_FOUND, array{}>
* @return DataDisplayResponse<Http::STATUS_OK, array{Content-Type: 'image/png'}>|FileDisplayResponse<Http::STATUS_OK, array{Content-Type: 'image/x-icon'}>|NotFoundResponse<Http::STATUS_NOT_FOUND, array{}>
* @throws \Exception
*
* 200: Favicon returned
Expand All @@ -95,12 +97,14 @@ public function getFavicon(string $app = 'core'): Response {

$response = null;
$iconFile = null;
// retrieve instance favicon
try {
$iconFile = $this->imageManager->getImage('favicon', false);
$response = new FileDisplayResponse($iconFile, Http::STATUS_OK, ['Content-Type' => 'image/x-icon']);
} catch (NotFoundException $e) {
}
if ($iconFile === null && $this->imageManager->shouldReplaceIcons()) {
// retrieve or generate app specific favicon
if (($this->imageManager->canConvert('PNG') || $this->imageManager->canConvert('SVG')) && $this->imageManager->canConvert('ICO')) {
$color = $this->themingDefaults->getColorPrimary();
try {
$iconFile = $this->imageManager->getCachedImage('favIcon-' . $app . $color);
Expand All @@ -113,9 +117,10 @@ public function getFavicon(string $app = 'core'): Response {
}
$response = new FileDisplayResponse($iconFile, Http::STATUS_OK, ['Content-Type' => 'image/x-icon']);
}
// fallback to core favicon
if ($response === null) {
$fallbackLogo = \OC::$SERVERROOT . '/core/img/favicon.png';
$response = new DataDisplayResponse($this->fileAccessHelper->file_get_contents($fallbackLogo), Http::STATUS_OK, ['Content-Type' => 'image/x-icon']);
$response = new DataDisplayResponse($this->fileAccessHelper->file_get_contents($fallbackLogo), Http::STATUS_OK, ['Content-Type' => 'image/png']);
}
$response->cacheFor(86400);
return $response;
Expand All @@ -125,7 +130,7 @@ public function getFavicon(string $app = 'core'): Response {
* Return a 512x512 icon for touch devices
*
* @param string $app ID of the app
* @return DataDisplayResponse<Http::STATUS_OK, array{Content-Type: 'image/png'}>|FileDisplayResponse<Http::STATUS_OK, array{Content-Type: 'image/x-icon'|'image/png'}>|NotFoundResponse<Http::STATUS_NOT_FOUND, array{}>
* @return DataDisplayResponse<Http::STATUS_OK, array{Content-Type: 'image/png'}>|FileDisplayResponse<Http::STATUS_OK, array{Content-Type: string}>|NotFoundResponse<Http::STATUS_NOT_FOUND, array{}>
* @throws \Exception
*
* 200: Touch icon returned
Expand All @@ -140,12 +145,14 @@ public function getTouchIcon(string $app = 'core'): Response {
}

$response = null;
// retrieve instance favicon
try {
$iconFile = $this->imageManager->getImage('favicon');
$response = new FileDisplayResponse($iconFile, Http::STATUS_OK, ['Content-Type' => 'image/x-icon']);
$response = new FileDisplayResponse($iconFile, Http::STATUS_OK, ['Content-Type' => $iconFile->getMimeType()]);
} catch (NotFoundException $e) {
}
if ($this->imageManager->shouldReplaceIcons()) {
// retrieve or generate app specific touch icon
if ($this->imageManager->canConvert('PNG')) {
$color = $this->themingDefaults->getColorPrimary();
try {
$iconFile = $this->imageManager->getCachedImage('touchIcon-' . $app . $color);
Expand All @@ -158,6 +165,7 @@ public function getTouchIcon(string $app = 'core'): Response {
}
$response = new FileDisplayResponse($iconFile, Http::STATUS_OK, ['Content-Type' => 'image/png']);
}
// fallback to core touch icon
if ($response === null) {
$fallbackLogo = \OC::$SERVERROOT . '/core/img/favicon-touch.png';
$response = new DataDisplayResponse($this->fileAccessHelper->file_get_contents($fallbackLogo), Http::STATUS_OK, ['Content-Type' => 'image/png']);
Expand Down
8 changes: 2 additions & 6 deletions apps/theming/lib/Controller/ThemingController.php
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -345,6 +345,7 @@ public function undoAll(): DataResponse {
#[OpenAPI(scope: OpenAPI::SCOPE_DEFAULT)]
public function getImage(string $key, bool $useSvg = true) {
try {
$useSvg = $useSvg && $this->imageManager->canConvert('SVG');
$file = $this->imageManager->getImage($key, $useSvg);
} catch (NotFoundException $e) {
return new NotFoundResponse();
Expand All @@ -355,13 +356,8 @@ public function getImage(string $key, bool $useSvg = true) {
$csp->allowInlineStyle();
$response->setContentSecurityPolicy($csp);
$response->cacheFor(3600);
$response->addHeader('Content-Type', $this->config->getAppValue($this->appName, $key . 'Mime', ''));
$response->addHeader('Content-Type', $file->getMimeType());
$response->addHeader('Content-Disposition', 'attachment; filename="' . $key . '"');
if (!$useSvg) {
$response->addHeader('Content-Type', 'image/png');
} else {
$response->addHeader('Content-Type', $this->config->getAppValue($this->appName, $key . 'Mime', ''));
}
return $response;
}

Expand Down
169 changes: 97 additions & 72 deletions apps/theming/lib/IconBuilder.php
View file
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@
namespace OCA\Theming;

use Imagick;
use ImagickDraw;
use ImagickPixel;
use OCP\Files\SimpleFS\ISimpleFile;

Expand All @@ -30,17 +31,18 @@ public function __construct(
* @return string|false image blob
*/
public function getFavicon($app) {
if (!$this->imageManager->shouldReplaceIcons()) {
if (!$this->imageManager->canConvert('PNG')) {
return false;
}
try {
$favicon = new Imagick();
$favicon->setFormat('ico');
$icon = $this->renderAppIcon($app, 128);
if ($icon === false) {
return false;
}
$icon->setImageFormat('png32');
$icon->setImageFormat('PNG32');

$favicon = new Imagick();
$favicon->setFormat('ICO');

$clone = clone $icon;
$clone->scaleImage(16, 0);
Expand Down Expand Up @@ -96,7 +98,9 @@ public function getTouchIcon($app) {
* @return Imagick|false
*/
public function renderAppIcon($app, $size) {
$appIcon = $this->util->getAppIcon($app);
$supportSvg = $this->imageManager->canConvert('SVG');
// retrieve app icon
$appIcon = $this->util->getAppIcon($app, $supportSvg);
if ($appIcon instanceof ISimpleFile) {
$appIconContent = $appIcon->getContent();
$mime = $appIcon->getMimeType();
Expand All @@ -110,80 +114,101 @@ public function renderAppIcon($app, $size) {
if ($appIconContent === false || $appIconContent === '') {
return false;
}

$appIconIsSvg = ($mime === 'image/svg+xml' || str_starts_with($appIconContent, '<svg') || str_starts_with($appIconContent, '<?xml'));
// if source image is svg but svg not supported, abort.
// source images are both user and developer set, and there is guarantees that mime and extension match actual contents type
if ($appIconIsSvg && !$supportSvg) {
return false;
}

$color = $this->themingDefaults->getColorPrimary();

// generate background image with rounded corners
$cornerRadius = 0.2 * $size;
$background = '<?xml version="1.0" encoding="UTF-8"?>'
. '<svg xmlns="http://www.w3.org/2000/svg" version="1.1" xmlns:cc="http://creativecommons.org/ns#" width="' . $size . '" height="' . $size . '" xmlns:xlink="http://www.w3.org/1999/xlink">'
. '<rect x="0" y="0" rx="' . $cornerRadius . '" ry="' . $cornerRadius . '" width="' . $size . '" height="' . $size . '" style="fill:' . $color . ';" />'
. '</svg>';
// resize svg magic as this seems broken in Imagemagick
if ($mime === 'image/svg+xml' || substr($appIconContent, 0, 4) === '<svg') {
if (substr($appIconContent, 0, 5) !== '<?xml') {
$svg = '<?xml version="1.0"?>' . $appIconContent;
} else {
$svg = $appIconContent;
}
$tmp = new Imagick();
$tmp->setBackgroundColor(new ImagickPixel('transparent'));
$tmp->setResolution(72, 72);
$tmp->readImageBlob($svg);
$x = $tmp->getImageWidth();
$y = $tmp->getImageHeight();
$tmp->destroy();

// convert svg to resized image
// construct original image object
try {
$appIconFile = new Imagick();
$resX = (int)(72 * $size / $x);
$resY = (int)(72 * $size / $y);
$appIconFile->setResolution($resX, $resY);
$appIconFile->setBackgroundColor(new ImagickPixel('transparent'));
$appIconFile->readImageBlob($svg);

/**
* invert app icons for bright primary colors
* the default nextcloud logo will not be inverted to black
*/
if ($this->util->isBrightColor($color)
&& !$appIcon instanceof ISimpleFile
&& $app !== 'core'
) {
$appIconFile->negateImage(false);

if ($appIconIsSvg) {
// handle SVG images
// ensure proper XML declaration
if (str_starts_with($appIconContent, '<?xml')) {
$svg = '<?xml version="1.0"?>' . $appIconContent;
} else {
$svg = $appIconContent;
}
// get dimensions for resolution calculation
$tmp = new Imagick();
$tmp->setBackgroundColor(new ImagickPixel('transparent'));
$tmp->setResolution(72, 72);
$tmp->readImageBlob($svg);
$x = $tmp->getImageWidth();
$y = $tmp->getImageHeight();
$tmp->destroy();
// set resolution for proper scaling
$resX = (int)(72 * $size / $x);
$resY = (int)(72 * $size / $y);
$appIconFile->setResolution($resX, $resY);
$appIconFile->readImageBlob($svg);
} else {
// handle non-SVG images
$appIconFile->readImageBlob($appIconContent);
}
} else {
$appIconFile = new Imagick();
$appIconFile->setBackgroundColor(new ImagickPixel('transparent'));
$appIconFile->readImageBlob($appIconContent);
} catch (\ImagickException $e) {
return false;
}
// offset for icon positioning
$padding = 0.15;
$border_w = (int)($appIconFile->getImageWidth() * $padding);
$border_h = (int)($appIconFile->getImageHeight() * $padding);
$innerWidth = ($appIconFile->getImageWidth() - $border_w * 2);
$innerHeight = ($appIconFile->getImageHeight() - $border_h * 2);
$appIconFile->adaptiveResizeImage($innerWidth, $innerHeight);
// center icon
$offset_w = (int)($size / 2 - $innerWidth / 2);
$offset_h = (int)($size / 2 - $innerHeight / 2);

$finalIconFile = new Imagick();
$finalIconFile->setBackgroundColor(new ImagickPixel('transparent'));
$finalIconFile->readImageBlob($background);
$finalIconFile->setImageVirtualPixelMethod(Imagick::VIRTUALPIXELMETHOD_TRANSPARENT);
$finalIconFile->setImageArtifact('compose:args', '1,0,-0.5,0.5');
$finalIconFile->compositeImage($appIconFile, Imagick::COMPOSITE_ATOP, $offset_w, $offset_h);
$finalIconFile->setImageFormat('png24');
if (defined('Imagick::INTERPOLATE_BICUBIC') === true) {
$filter = Imagick::INTERPOLATE_BICUBIC;
} else {
$filter = Imagick::FILTER_LANCZOS;
// calculate final image size and position
$padding = 0.85;
$original_w = $appIconFile->getImageWidth();
$original_h = $appIconFile->getImageHeight();
$contentSize = (int)floor($size * $padding);
$scale = min($contentSize / $original_w, $contentSize / $original_h);
$new_w = max(1, (int)floor($original_w * $scale));
$new_h = max(1, (int)floor($original_h * $scale));
$offset_w = (int)floor(($size - $new_w) / 2);
$offset_h = (int)floor(($size - $new_h) / 2);
$cornerRadius = 0.2 * $size;
$color = $this->themingDefaults->getColorPrimary();
// resize original image
$appIconFile->resizeImage($new_w, $new_h, Imagick::FILTER_LANCZOS, 1);
/**
* invert app icons for bright primary colors
* the default nextcloud logo will not be inverted to black
*/
if ($this->util->isBrightColor($color)
&& !$appIcon instanceof ISimpleFile
&& $app !== 'core'
) {
$appIconFile->negateImage(false);
}
// construct final image object
try {
// image background
$finalIconFile = new Imagick();
$finalIconFile->setBackgroundColor(new ImagickPixel('transparent'));
// icon background
$finalIconFile->newImage($size, $size, new ImagickPixel('transparent'));
$draw = new ImagickDraw();
$draw->setFillColor($color);
$draw->roundRectangle(0, 0, $size - 1, $size - 1, $cornerRadius, $cornerRadius);
$finalIconFile->drawImage($draw);
$draw->destroy();
// overlay icon
$finalIconFile->setImageVirtualPixelMethod(Imagick::VIRTUALPIXELMETHOD_TRANSPARENT);
$finalIconFile->setImageArtifact('compose:args', '1,0,-0.5,0.5');
$finalIconFile->compositeImage($appIconFile, Imagick::COMPOSITE_ATOP, $offset_w, $offset_h);
$finalIconFile->setImageFormat('PNG32');
if (defined('Imagick::INTERPOLATE_BICUBIC') === true) {
$filter = Imagick::INTERPOLATE_BICUBIC;
} else {
$filter = Imagick::FILTER_LANCZOS;
}
$finalIconFile->resizeImage($size, $size, $filter, 1, false);

return $finalIconFile;
} finally {
unset($appIconFile);
}
$finalIconFile->resizeImage($size, $size, $filter, 1, false);

$appIconFile->destroy();
return $finalIconFile;
return false;
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@kesselb kesselb Dec 3, 2025

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Did you forgot the catch block for the exception?

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@SebastianKrupinski SebastianKrupinski Dec 3, 2025

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Nope, this is just a default return, this should never get triggered but I did not want to change the function signature. The original code did not throw a error, so just matching that.

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@kesselb kesselb Dec 4, 2025 •
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The try-catch-finally block does not catch any exceptions. That means if an error occurs, the variable is unset and the exception still bubbles up. If no exception occurs, the function returns earlier. This makes the final return block unreachable. It is not documented that the functions throw and the previous try-catch block does catch the ImagickException, so I wanted to check whether the catch block is missing.

}

/**
Expand Down
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