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Closing #5 : preserving transparency in images while converting them to webp

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Kibi Kelburton
2026-05-11 08:50:28 +02:00
parent fc2e366647
commit f608724968
3 changed files with 3 additions and 3 deletions
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2
src/avatar_handler.mjs
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@@ -137,7 +137,7 @@ export const handleAvatarUpload = async (req, res) => {
// Convert to webp using ImageMagick with coalesce for GIF handling
try {
await execFile('magick', [tmpPath, '-coalesce', '-resize', '256x256^', '-gravity', 'center', '-extent', '256x256', '-quality', '50', finalPath]);
await execFile('magick', [tmpPath, '-coalesce', '-resize', '256x256^', '-gravity', 'center', '-background', 'none', '-extent', '256x256', '-quality', '50', finalPath]);
} catch (err) {
console.error('[AVATAR HANDLER] Magick error:', err);
await fs.unlink(tmpPath).catch(() => { });

2
src/hall_image_handler.mjs
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@@ -101,7 +101,7 @@ export const handleHallImageUpload = async (req, res) => {
// -coalesce is required for animated GIFs: it composites delta frames into full frames
// before resizing, preventing heavy artifacts. Output is animated WebP for GIFs.
try {
await execFile('magick', [tmpPath, '-coalesce', '-resize', '600x300^', '-gravity', 'center', '-extent', '600x300', '-quality', '85', finalPath]);
await execFile('magick', [tmpPath, '-coalesce', '-resize', '600x300^', '-gravity', 'center', '-background', 'none', '-extent', '600x300', '-quality', '85', finalPath]);
} catch (err) {
console.error('[HALL IMG] Magick error:', err.stderr || err.message);
await fs.unlink(tmpPath).catch(() => {});

2
src/user_hall_image_handler.mjs
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@@ -97,7 +97,7 @@ export const handleUserHallImageUpload = async (req, res, slug) => {
// Resize to 600x300 webp
try {
await execFile('magick', [tmpPath, '-coalesce', '-resize', '600x300^', '-gravity', 'center', '-extent', '600x300', '-quality', '85', finalPath]);
await execFile('magick', [tmpPath, '-coalesce', '-resize', '600x300^', '-gravity', 'center', '-background', 'none', '-extent', '600x300', '-quality', '85', finalPath]);
} catch (err) {
console.error('[USER_HALL_IMG] Magick error:', err.stderr || err.message);
await fs.unlink(tmpPath).catch(() => {});