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Implement CachedBitmap #8987

Merged

JeremyKuhne merged 1 commit into dotnet:main from JeremyKuhne:cachedbitmap

Apr 14, 2023

Commits on Apr 13, 2023

Implement CachedBitmap

Implements GDI+ `CachedBitmap` wrapper which allows caching a device dependent copy of `Bitmap`. Rendering is signficantly faster (5x+), although it has a few caveats:

- It needs to be regenerated if color depth changes
- It cannot be rendered to a Graphics object that has a tranform other than translation (no rotation, scaling)

Fixes dotnet#8822

JeremyKuhne committed Apr 13, 2023