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Designing SVG Web Graphics by Andrew H. Watt

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Why Use Filters

The filters provided in the SVG specification give to SVG many of the features you might have associated in the past exclusively with bitmap graphics programs.

All graphics are presented onscreen as bitmaps. The only question is when a graphic is converted to bitmaps. In graphics programs like Adobe Photoshop or Jasc Paint Shop Pro, the rendering to bitmap is carried out within the graphics program and, when you are creating GIFs and JPEGs, for example, the generated gradients are saved and exported as bitmap graphics. With SVG, the instructions are retained in an editable format until the SVG elements are rendered on the client machine by the SVG viewer.

Not surprisingly, companies such as Adobe and Jasc, which have expertise ...

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