SVN commit 508640 by mwiesweg:
digikam from trunk: DImg: always preserve metadata, better bitBlt support
- group data members of a DImg object:
- metadata
- image data (null, width, height, alpha, sixteenbit)
- data pointer
With imaging operations, the first group is always preserved, the latter two may change
- add a few private methods for often reused code
- add a private constructor which copies metadata, but creates a new data buffer with a new size,
used by copy and scale
- add a putImage method which replaces the data pointer and the image data,
used by DImgInterface and thus the image plugins
- add a stripImageData method which allows to "strip" the data off, take
ownership of the buffer, and leave the image as null. Useful for temporary images.
- extend bitBlt to support source coordinates, width and height parameters.
- add some flavors of the bitBltImage method, all using bitBlt in the end
- use bitBlt for copy and crop to eliminate all the code doing simple blitting operations
- add some comments in dimg files
- add a method metadata(DImg::METADATA) in analogy to attribute() and embeddedText().
Is a method setMetadata necessary?
CCMAIL:
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M +260 -147 dimg.cpp
M +47 -9 dimg.h
M +3 -5 dimgscale.cpp
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