* {hardwarespecific} contains width of RAMDAC
* cmap[X] is programmed to (X << red.offset) | (X << green.offset) | (X << blue.offset)
* RAMDAC[X] is programmed to (red, green, blue)
- *
+ *
* Pseudocolor:
- * uses offset = 0 && length = RAMDAC register width.
- * var->{color}.offset is 0
- * var->{color}.length contains widht of DAC
+ * var->{color}.offset is 0 unless the palette index takes less than
+ * bits_per_pixel bits and is stored in the upper
+ * bits of the pixel value
+ * var->{color}.length is set so that 1 << length is the number of available
+ * palette entries
* cmap is not used
* RAMDAC[X] is programmed to (red, green, blue)
+ *
* Truecolor:
* does not use DAC. Usually 3 are present.
* var->{color}.offset contains start of bitfield