Colormap
Name
Colormap -- An class for creating a color palette for use with a Raster.
Description
Mechanism used to map numbers in the range [0, 255] to colour names. Create an XColormap, allocate colours in it, and pass it to a Raster widget for drawing.
Methods
Phase: Using
- (void)
unsetColor: (Color)
c Remove color at index `c' from the color map.
- (BOOL)
setColor: (Color)
c ToGrey: (double)
g Add a color of a certain level of grey.
- (BOOL)
setColor: (Color)
c ToName: (const char *)
colorName Add color index `c' looking up the color name in the color database.
- (BOOL)
setColor: (Color)
c ToRed: (double)
r Green: (double)
g Blue: (double)
b Add color index `c' to the color map, using a certain percent of red, green, and blue.
- (PixelValue)
white The pixel value for white.
- (PixelValue)
black The pixel value for black.
- (PixelValue *)
map The current palette, per color-index.