diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/fl_color.cxx | 42 |
1 files changed, 22 insertions, 20 deletions
diff --git a/src/fl_color.cxx b/src/fl_color.cxx index 2c1544a18..64368168f 100644 --- a/src/fl_color.cxx +++ b/src/fl_color.cxx @@ -1,5 +1,5 @@ // -// "$Id: fl_color.cxx,v 1.11 1999/01/19 19:10:39 mike Exp $" +// "$Id: fl_color.cxx,v 1.12 1999/01/25 20:43:05 mike Exp $" // // Color functions for the Fast Light Tool Kit (FLTK). // @@ -316,25 +316,27 @@ void Fl::get_color(Fl_Color i, uchar &red, uchar &green, uchar &blue) { blue = uchar(c>>8); } +Fl_Color fl_color_average(Fl_Color color1, Fl_Color color2, float weight) { + Fl_Color avg; + unsigned rgb1 = fl_cmap[color1]; + unsigned rgb2 = fl_cmap[color2]; + uchar r, g, b; + + r = (uchar)(((uchar)(rgb1>>24))*weight + ((uchar)(rgb2>>24))*(1-weight)); + g = (uchar)(((uchar)(rgb1>>16))*weight + ((uchar)(rgb2>>16))*(1-weight)); + b = (uchar)(((uchar)(rgb1>>8))*weight + ((uchar)(rgb2>>8))*(1-weight)); + + if (r == g && r == b) { // get it out of gray ramp + avg = fl_gray_ramp(r*FL_NUM_GRAY/256); + } else { // get it out of color cube: + avg = fl_color_cube(r*FL_NUM_RED/256,g*FL_NUM_GREEN/256,b*FL_NUM_BLUE/256); + } + + return avg; +} + Fl_Color inactive(Fl_Color c) { - // cache because it is like to ask for the same color a lot: - static Fl_Color cache_from = FL_GRAY; - static Fl_Color cache_to = FL_GRAY; - if (c == cache_from) return cache_to; - cache_from = c; - // do a 33% mix between this color and FL_GRAY: - unsigned rgb1 = fl_cmap[c]; - unsigned rgb2 = fl_cmap[FL_GRAY]; - uchar r = (uchar)((((uchar)(rgb1>>24)) + ((uchar)(rgb2>>24))*2)/3); - uchar g = (uchar)((((uchar)(rgb1>>16)) + ((uchar)(rgb2>>16))*2)/3); - uchar b = (uchar)((((uchar)(rgb1>> 8)) + ((uchar)(rgb2>> 8))*2)/3); - // and find the closest color in gray ramp or color cube: - if (r == g && r == b) // get it out of gray ramp - cache_to = fl_gray_ramp(r*FL_NUM_GRAY/256); - else // get it out of color cube: - cache_to = - fl_color_cube(r*FL_NUM_RED/256,g*FL_NUM_GREEN/256,b*FL_NUM_BLUE/256); - return cache_to; + return fl_color_average(c, FL_GRAY, .33f); } Fl_Color contrast(Fl_Color fg, Fl_Color bg) { @@ -349,5 +351,5 @@ Fl_Color contrast(Fl_Color fg, Fl_Color bg) { } // -// End of "$Id: fl_color.cxx,v 1.11 1999/01/19 19:10:39 mike Exp $". +// End of "$Id: fl_color.cxx,v 1.12 1999/01/25 20:43:05 mike Exp $". // |