Bug 493455 - [win32] remove alpha and alphaData from Image

Only use the alpha channel of the underlying BITMAP since it is hard if
not impossible to keep alphaData manually in sync with the alpha channel
of the underlying BITMAP when a GC is used to draw onto the image with
transparency.

Change-Id: I61780ff5c54e22ef5137c6c21eb4cfa8c903c7ac
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.swt/+/190395
Tested-by: Niraj Modi <niraj.modi@in.ibm.com>
Reviewed-by: Niraj Modi <niraj.modi@in.ibm.com>
2 files changed
tree: 4ec50e66f3e84ef501471f49aa05cd38da606b38
  1. bundles/
  2. container/
  3. examples/
  4. features/
  5. local-build/
  6. tests/
  7. .gitattributes
  8. .gitignore
  9. CONTRIBUTING
  10. Jenkinsfile
  11. LICENSE
  12. NOTICE
  13. pom.xml
  14. README.md
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