Colorizing a bitmap
Colorizing a bitmap
- Subject: Colorizing a bitmap
- From: "Craig Dooley" <email@hidden>
- Date: Mon, 21 Aug 2006 09:46:07 -0400
I am writing a remote desktop client, and one of the drawing
operations is drawing text in color. Glyphs are sent in one operation
as a bitmap, and cached. It is later requested that a string of
glyphs be drawn in a specific color.
Currently I am creating a new NSBitmapImageRep for each glyph and
drawing that in black, but I am having a hard time figuring out the
best way to color this. The options I have thought of are
1. Store the bitmap and then create a new image each time I want to
draw by creating a new solid plane for the color and using the bitmap
as an alpha mask.
2. Colorize the image using
colorizeByMappingGray:toColor:blackMapping:whiteMapping:. However, I
would have to have a 8 bits per sample NSBitmapImageRep, and currently
I am only using 1bit per sample.
3. Use core graphics to create a stencil pattern.
4. Use core graphics with the bitmap as an image mask.
Is there an easier way that I have overlooked? Any suggestions?
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Craig Dooley <email@hidden>
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