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This repository was archived by the owner on May 28, 2025. It is now read-only.
This repository was archived by the owner on May 28, 2025. It is now read-only.

CGDataProvider is, but should not be, an NS/CFData. #1450

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CGDataProvider is, but should not be, an NS/CFData.#1450
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aballway
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Area-FoundationSubArea-CoreGraphicsTask
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1701
@DHowett-MSFT

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@DHowett-MSFT
DHowett-MSFT
opened on Nov 23, 2016
  • CGDataProviderCopyData returns another CGDataProvider masquerading as a CFData.
  • CGDataProvider is an Objective-C class in an otherwise C framework.
  • CGDataProvider confounds the debugger, which knows it is an NSData (but not really, so it shows 0 bytes)
  • CGDataProvider cannot hash like a normal NSCFData, making it useless for operations requiring hashing.
  • CGDataProvider does not support streams.
  • CGDataProvider doesn't have a CFTypeID since it's not a CFType.

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Area-FoundationSubArea-CoreGraphicsTask

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