Auto Compression

// Simplified version of Imperial's compression logic
async function compressImage(buffer, mimeType, quality = 80) {
  const sharpInstance = sharp(buffer);

  switch (mimeType) {
    case "image/jpeg":
      return await sharpInstance
        .jpeg({
          quality,
          progressive: true, // Better for web loading
          optimizeScans: true, // Optimal scan compression
          chromaSubsampling: "4:2:0", // Standard subsampling
        })
        .toBuffer();

    case "image/png":
      return await sharpInstance
        .png({
          quality,
          compressionLevel: 9, // Maximum compression
          adaptiveFiltering: true, // Better compression
          palette: true, // Use indexed color if possible
        })
        .toBuffer();

    case "image/webp":
      return await sharpInstance
        .webp({
          quality,
          effort: 4, // Balance speed vs compression
          smartSubsample: true, // Better quality at edges
        })
        .toBuffer();
  }
}

Original JPEG (iPhone 14 Pro Max):
├─ Resolution: 4032 × 3024
├─ File size: 3.8 MB
└─ Quality: 100%

After 80% Compression:
├─ Resolution: 4032 × 3024 (unchanged)
├─ File size: 1.4 MB (63% smaller)
└─ Quality: Visually identical

Original PNG (4K monitor):
├─ Resolution: 3840 × 2160
├─ File size: 2.2 MB
└─ Colors: 16.7 million

After Compression:
├─ Resolution: 3840 × 2160 (unchanged)
├─ File size: 1.6 MB (27% smaller)
└─ Colors: Optimized palette

Original WebP (design export):
├─ Resolution: 1920 × 1080
├─ File size: 890 KB
└─ Transparency: Yes

After 80% Compression:
├─ Resolution: 1920 × 1080 (unchanged)
├─ File size: 310 KB (65% smaller)
└─ Transparency: Preserved

1 image at 80% compression:
├─ Original: 2.5 MB
├─ Compressed: 1.0 MB
└─ Saved: 1.5 MB (60%)

100 images:
└─ Saved: 150 MB

1,000 images:
└─ Saved: 1.5 GB

10,000 images:
└─ Saved: 15 GB ✨

Starter Plan (5 GB):
├─ Without compression: ~2,000 images
└─ With compression: ~5,000 images (2.5x more!)

Pro Plan (10 GB):
├─ Without compression: ~4,000 images
└─ With compression: ~10,000 images

# Uploads automatically compressed based on your settings
curl -X POST https://api.imperial.gay/images/upload \
  -H "Authorization: Bearer imperial_live_xxxxxxxxxxxxx" \
  -F "file=@photo.jpg"

# Response includes compression info
{
  "compressed": true,
  "originalSize": 2500000,
  "compressedSize": 1000000
}

Baseline JPEG:
└─ Loads top-to-bottom
└─ Slow on poor connections

Progressive JPEG:
├─ Loads in increasing quality
├─ Shows full image immediately (low quality)
└─ Refines to full quality
└─ Better perceived performance