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pranav8iisc@gmail.com writes:
Hi,
My display supports 32-bit visuals. I have alpha channel information for every pixel in the pixmap. I want to know if it is possible to initialize this pixmap directly pixel-by-pixel? Or, do I need to create an XImage, set alpha channel there and call XPutImage?, If so, could anyone please share
the code to create XImage with alpha channel information.
More specific details: I want to implement edge-blending in our multiprojector tiled display system using NVIDIA Warp and Blend API. I have pre-computed alpha values for each pixel which I want to set in the pixmap
to be forwarded to GPU via this API.
That's pretty much the only way to do it, by creating an image buffer, and
then writing it out to a pixmap. That's how I do it; except that I use the
xcb library instead of Xlib, so my code won't help you much.
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