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Chapter 6. Rendering > Scan Conversion Details

6.5. Scan Conversion Details

The final step of rendering is scan conversion. As discussed in Section 2.1.4, “Scan Conversion,” the application executes a scan conversion algorithm to paint graphics, text, and images in the raster memory of the output device.

The specifics of the scan conversion algorithm are not defined as part of PDF. Different implementations can perform scan conversion in different ways; techniques that are appropriate for one device may be inappropriate for another. Still, it is useful to have a general understanding of how scan conversion works, particularly when creating PDF documents intended for viewing on a display. At the low resolutions typical of displays, variations of even one pixel's width can have a noticeable effect on the appearance of painted shapes.


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