Ignore:
Timestamp:
Dec 25, 2003, 7:08:46 PM (16 years ago)
Author:
Sam Hocevar
Message:
  • NOTES: + Added a section with a proposed solution to the slang problem.
File:
1 edited

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  • libcaca/trunk/NOTES

    r231 r279  
    123123      works around the problem but gets rid of the alternate charset.
    124124
     125      We can work around this problem. See this usage grid:
     126
     127                      bg                         1 1 1 1 1 1
     128        fg                  0 1 2 3 4 5 6 7  8 9 0 1 2 3 4 5
     129
     130        0 (black)             C C C C C C F  B c c c c c c F
     131        1 (blue)            A   h D h D * f  C C h E h E F g
     132        2 (green)           A h   D h * D f  C h C E h * E g
     133        3 (cyan)            A D D   * h h f  C E E C * h h g
     134        4 (red)             A h h *   D D f  C h h * C E E g
     135        5 (magenta)         A D * h D   h f  C E * h E C h g
     136        6 (brown)           A * D h D h   f  C * E h E h C g
     137        7 (light gray)      A a a a a a a    B C C C C C C B
     138
     139        8 (dark gray)       A C C C C C C B    d d d d d d C
     140        9 (light blue)      A C h E h E * C  e   h D h D * C
     141        10 (light green)    A h C E h * E C  e h   D h * D C
     142        11 (light cyan)     A E E C * h h C  e D D   * h h C
     143        12 (light red)      A h h * C E E C  e h h *   D D C
     144        13 (light magenta)  A E * h E C h C  e D * h D   h C
     145        14 (yellow)         A F E h E h C C  e * D h D h   C
     146        15 (white)          A b b b b b b B  C C C C C C C 
     147
     148      ' ': useless colour pairs that can be emulated by printing a space in
     149           any other colour pair that has the same background
     150      'A': black background colour pairs that are needed for the old renderer
     151      'B': gray combinations used for grayscale dithering
     152      'C': white/light, light/dark, lightgray/light, darkgray/dark, dark/black
     153           combinations often used for saturation/value dithering (the two
     154           other possible combinations, lightgray/dark and darkgray/light, are
     155           not considered here)
     156      'D': next colour combinations for hue dithering (magenta/blue, blue/green
     157           and so on)
     158      'E': next colour combinations for hue/value dithering (blue/lightgreen,
     159           green/lightblue and so on)
     160      'F': black on light gray, black on white, and yellow/blue (chosen
     161           arbitrarily)
     162
     163      'A': 15 colour pairs
     164      'A'+'B': 20 colour pairs
     165      'A'+'B'+'C': 76 colour pairs
     166      'A'+'B'+'C'+'D': 100 colour pairs
     167      'A'+'B'+'C'+'D'+'E': 124 colour pairs
     168      'A'+'B'+'C'+'D'+'E'+'F': 128 colour pairs
     169
     170      The remaining slightly important colour pairs are:
     171
     172      'a': light gray on dark colour: emulate with light colour on dark colour
     173      'b': white on dark colour: emulate with light gray on light colour
     174      'c': black on light colour: emulate with dark gray on dark colour
     175      'd': dark gray on light colour: emulate with dark colour on light colour
     176      'e': light colour on dark gray: emulate with dark colour on dark gray
     177      'f': dark colour on light gray: emulate with light colour on dark gray
     178      'g': dark colour on white: emulate with light colour on white
     179
     180      And now the seldom used pairs:
     181
     182      'h': 120 degree hue pairs can be emulated as well; for instance blue on
     183           red can be emulated using magenta on red, and blue on green using
     184           cyan on green
     185
     186      And the almost never used pairs:
     187
     188      'i': dark opposite on dark: emulate with dark opposite on black
     189      'j': light opposite on dark: emulate with light opposite on black
     190      'k': dark opposite on light: emulate with black on dark
     191      'l': light opposite on light: emulate with white on light
     192
    125193   o  MS-DOS: all bright colours, bright backgrounds, and bright combinations
    126194      work using <conio.h>. No need to kludge anything.
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