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Add JPEG (DCTDecode) XObject rendering support
Implement image XObject handling in the parser and Cairo backend.
Detect Do operators, resolve XObject resources, and dispatch Image
and Form subtypes. Introduce a device_draw_image() entry point for
rendering.
Replace unsupported pdfioObjGetStream usage with pdfioObjOpenStream
and buffered pdfioStreamRead to avoid nested stream issues. Decode
JPEG (DCTDecode) image data, convert it into a Cairo image surface,
and render it with correct PDF coordinate orientation.
Update content stream handling to safely process Do by closing the
active page stream before opening XObject streams. Add basic testing
with image-based PDFs.
Test
Single Image Pdf
Multi-Image Pdf
Preview
PDF with single image
PDF with multiple image
