CODEWITHSUNDEEP
winapibitmapgdimask
andygeers
andygeers

Reputation: 6986

Raster Operator to use for MaskBlt

I'm trying to use the GDI MaskBlt command to draw an image with transparency: http://msdn.microsoft.com/en-us/library/dd145047(VS.85).aspx

I can't seem to find anything in the documentation about what raster operator to use for the obvious use case: a sort of MAKEROP4(SRCCOPY, DSTCOPY) - blitting where the mask is 1, and leaving the destination untouched where the mask is 0. SRCCOPY is a valid ROP, but what should I use in place of my fictional DSTCOPY ?

Upvotes: 0

Views: 2272

Answers (2)

gtk
gtk

Reputation:

Avoid MaskBlt and use transparency Win32 apis.

Upvotes: -1

andygeers
andygeers

Reputation: 6986

The MSDN page "Ternary Raster Operations" explains that the correct value is 0x00AA0029.

Upvotes: 5

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