Details
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Type:
Improvement
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Status: Closed
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Priority:
Major
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Resolution: Fixed
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Affects Version/s: 4.3
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Fix Version/s: 5.0
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Component/s: Core/Parsing
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Labels:None
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Environment:any
Description
When a PDF document is loaded that contains images a relatively significant amount of time is spent parsing the image data. When the image is being parsed it blocks the main content thread and as a result the perception of load time is greatly increased even if there was text or other shapes that could be immediately been painted.
I would like to introduce an image proxy that would differ image loading until the image actually needs to be painted or processed by a separate consumer thread. The Shapes class already has a paint observer setup for incremental painting, this same mechanism could be used to queue a repaint of a page when the images becomes available.
I would like to introduce an image proxy that would differ image loading until the image actually needs to be painted or processed by a separate consumer thread. The Shapes class already has a paint observer setup for incremental painting, this same mechanism could be used to queue a repaint of a page when the images becomes available.
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Page proxy has been added to the rendering core. The proxy can be turned off with the property org.icepdf.core.imageProxy=false.