TCustomBitmap.RawimageNeeded procedure
Ensures that the RawImage data is allocated prior to use.
Declaration
procedure RawimageNeeded(ADescOnly: Boolean)Arguments
ADescOnly | True when only the image descriptor in the raw image data is needed. |
Description
Ensures that the RawImage property is allocated prior to accessing
values in the raw image data.
ADescOnly indicates whether the image descriptor or the
complete raw image data is required. When ADescOnly is
True, only the
TRawImageDescription in the raw image is needed. When set to
False, all values in the
TRawImage instance are
required.
RawImageNeeded is called from methods access the raw image data, and occurs before the value in RawImage is accessed. For example:
- SetSize
- UpdatePixelFormat
- GetMonochrome
- UnshareImage
- GetRawImagePtr
- GetRawImageDescriptionPtr
An experiment, built from development snapshots. Not the official Free Pascal or Lazarus documentation.