JPEG Format & libjpeg Integration Skill (wlframe/C Style)

When to Apply

Use this skill when implementing, integrating, or reviewing JPEG read/write C code in wlframe, especially in image/, buffer/, or related modules, or when using libjpeg for JPEG parsing/generation.

JPEG Format Essentials

• JPEG is a lossy compressed image format, widely used for photographs.
• Uses DCT, quantization, Huffman coding; supports grayscale and color (YCbCr).
• File starts with 0xFFD8 (SOI), ends with 0xFFD9 (EOI), contains various markers (APPn, DQT, DHT, SOF, SOS, etc.).