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They test for NULL and make the code look nicer.
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The run-together words are dead! Long live the underscores!
The postscript inspired naming convention of using all run-together
words has served us well, but it is now time for more readable code.
In this commit I have also added the sed script, rename.sed, that I used
to convert the source. Use it on your patches and application code.
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Only scale grayscale images before color converting,
at least until we figure out how to consistently handle
premultiplied alpha with the smooth scaling and color
conversion code.
We must also take care not to scale indexed images!
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Grayscale images should be converted to RGB after downscaling,
and vice versa for CMYK -> RGB. Separation and DeviceN based
images have very expensive color conversions and should also
be converted after scaling.
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image dictionary.
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functions.
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alpha painting.
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rendering loops so they don't depend on the scan converter.
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transparency buffer after popping the XObject clip masks.
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when drawing primitive objects.
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don't divide by zero).
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Changed key bindings a bit.
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