:: com :: sun :: star :: rendering ::
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unpublished |
interface XHalfFloatReadOnlyBitmap |
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- Base Interfaces
XHalfFloatReadOnlyBitmap
┗ XBitmap
XBitmap |
- (referenced interface's summary:)
- This is a generic interface to a bitmap.
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- Usage Restrictions
- not published
- Description
- Specialized interface for bitmaps containing half floats as their
color components. Half floats are 16 bit wide, and some high-end
GPUs already have them as supported frame buffer format. In
contrast to XHalfFloatBitmap, this interface only
permits read-only access.
Use this interface for e.g. bitmaps that are calculated
on-the-fly, or that are pure functional, and thus cannot be
modified.
If you get passed an instance of
XHalfFloatReadOnlyBitmap that also supports the
XVolatileBitmap interface, things become a bit more
complicated. When reading data, one has to check for both
VolatileContentDestroyedException and mismatching
FloatingPointBitmapLayout return values. If either of them
occurs, the whole bitmap read operation should be repeated.
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Methods' Summary |
getData |
Query the raw data of this bitmap. |
getPixel |
Get a single pixel of the bitmap, returning its color
value. |
getMemoryLayout |
Query the memory layout for this bitmap. |
Methods' Details |
getData
- Description
- Query the raw data of this bitmap.
Query the raw data of this bitmap, in the format as defined by
getMemoryLayout(). With the given rectangle, a subset of the
whole bitmap can be queried. When querying subsets of the
bitmap, the same scanline padding takes place as when the
whole bitmap is requested. Note: as we currently have no 16
bit float UNO data type, the values are transported as 16 bit
integers across the API (which requires casting on both
sides).
- Throws
- VolatileContentDestroyedException
if the bitmap is volatile, and the content has been destroyed by the system.
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getPixel
- Description
- Get a single pixel of the bitmap, returning its color
value.
- Throws
- VolatileContentDestroyedException
if the bitmap is volatile, and the content has been destroyed by the system.
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getMemoryLayout
- Description
- Query the memory layout for this bitmap.
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