diff options
Diffstat (limited to 'util')
| -rw-r--r-- | util/README.txt | 6 | ||||
| -rw-r--r-- | util/cmap.cxx | 198 |
2 files changed, 204 insertions, 0 deletions
diff --git a/util/README.txt b/util/README.txt new file mode 100644 index 000000000..bfafb80fd --- /dev/null +++ b/util/README.txt @@ -0,0 +1,6 @@ + +Utility programs used to build the FLTK library. + +Contents: + + cmap.cxx generate src/fl_cmap.h diff --git a/util/cmap.cxx b/util/cmap.cxx new file mode 100644 index 000000000..e413c4534 --- /dev/null +++ b/util/cmap.cxx @@ -0,0 +1,198 @@ +// +// Colormap generation program for the Fast Light Tool Kit (FLTK). +// +// Copyright 1998-2022 by Bill Spitzak and others. +// +// This library is free software. Distribution and use rights are outlined in +// the file "COPYING" which should have been included with this file. If this +// file is missing or damaged, see the license at: +// +// https://www.fltk.org/COPYING.php +// +// Please see the following page on how to report bugs and issues: +// +// https://www.fltk.org/bugs.php +// + +// +// This program produces the contents of "fl_cmap.h" on stdout +// +// Compile, link, run and delete the program 'cmap' (for instance on a +// Linux system) to generate fl_cmap.h: +// +// gcc -o cmap cmap.cxx -lm && ./cmap > ../src/fl_cmap.h && rm -f ./cmap + +#include <stdio.h> +#include <math.h> +#include <time.h> + +// This table is initialized with color values I got by reading the +// colormap on an IRIX 4.3 machine: + +// "full intensity colors" have been turned down some to make white +// background less intense by default. The hope is that this will make +// fltk programs more friendly on color-adjusted screens. If you want +// pure colors you should get them out of the colormap. + +// #define III 244 // maximum intensity of the basic colors + +// that results in errors and unshared colormap entries, so full intensity: + +#define III 255 // maximum intensity of the basic colors + +static short cmap[256][3] = { + + // 3-bit colormap: + + { 0, 0, 0}, // black + {III, 0, 0}, // red + { 0,III, 0}, // green + {III,III, 0}, // yellow + { 0, 0,III}, // blue + {III, 0,III}, // magenta + { 0,III,III}, // cyan + {III,III,III}, // white + + // pastel versions of those colors, from SGI's standard color map: + + { 85, 85, 85}, // 1/3 gray + {198,113,113}, // salmon? pale red? + {113,198,113}, // pale green + {142,142, 56}, // khaki + {113,113,198}, // pale blue + {142, 56,142}, // purple, orchid, pale magenta + { 56,142,142}, // cadet blue, aquamarine, pale cyan + + // The next location (15) is used for FL_SELECTION_COLOR. It formerly was + // 2/3 gray but this is changed to be the Windows blue color. This allows + // the default behavior on both X and Windows to match: + // {170,170,170}, // old 2/3 gray color + + { 0, 0,128}, // 15 = FL_SELECTION_COLOR + + // These next 16 (index 16 - 31) are the FL_FREE_COLOR area. In some + // versions of fltk these were filled with random colors that a Irix 5.3 + // machine placed in these locations. + + // This version uses colors that NewTek has assigned for their GUI + // (from George Yohng): + + {168,168,152}, // 16 = FL_FREE_COLOR + {232,232,216}, + {104,104, 88}, + {152,168,168}, + {216,232,232}, + { 88,104,104}, + {156,156,168}, + {220,220,232}, + { 92, 92,104}, + {156,168,156}, + {220,232,220}, + { 92,104, 92}, + {144,144,144}, + {192,192,192}, + { 80, 80, 80}, + {160,160,160}, // 31 + + // The rest of the colormap is a gray ramp and table, filled in below: +}; + +// This is Fl::background from Fl_get_system_colors.cxx, with modifications: + +#define FL_GRAY_RAMP 32 +#define FL_NUM_GRAY 24 +#define FL_GRAY 49 // old value is 47 +typedef unsigned char uchar; + +void background(uchar r, uchar g, uchar b) { + // replace the gray ramp so that color 47 (by default 2/3) is this color + if (!r) + r = 1; + else if (r == 255) + r = 254; + double powr = log(r / 255.0) / log((FL_GRAY - FL_GRAY_RAMP) / (FL_NUM_GRAY - 1.0)); + if (!g) + g = 1; + else if (g == 255) + g = 254; + double powg = log(g / 255.0) / log((FL_GRAY - FL_GRAY_RAMP) / (FL_NUM_GRAY - 1.0)); + if (!b) + b = 1; + else if (b == 255) + b = 254; + double powb = log(b / 255.0) / log((FL_GRAY - FL_GRAY_RAMP) / (FL_NUM_GRAY - 1.0)); + for (int i = 0; i < FL_NUM_GRAY; i++) { + double gray = i / (FL_NUM_GRAY - 1.0); + cmap[i + FL_GRAY_RAMP][0] = uchar(pow(gray, powr) * 255 + .5); + cmap[i + FL_GRAY_RAMP][1] = uchar(pow(gray, powg) * 255 + .5); + cmap[i + FL_GRAY_RAMP][2] = uchar(pow(gray, powb) * 255 + .5); + } +} + +int main() { + + int i, r, g, b, year; + time_t t = time(0); + struct tm *lt = localtime(&t); + year = lt->tm_year + 1900; // copyright year + + // fill in the gray ramp: + // background(170, 170, 170); // old fltk colors + background(0xc0, 0xc0, 0xc0); // microsoft colors + + // copy the 1/3 and 2/3 gray to the closest locations in gray ramp: + cmap[39][0] = cmap[39][1] = cmap[39][2] = 85; + cmap[47][0] = cmap[47][1] = cmap[47][2] = 170; + + // fill in the color cube + i = 56; + for (b = 0; b < 5; b++) { + for (r = 0; r < 5; r++) { + for (g = 0; g < 8; g++) { + cmap[i][0] = r * 255 / 4; + cmap[i][1] = g * 255 / 7; + cmap[i][2] = b * 255 / 4; + i++; + } + } + } + + // write comment into 'cmap.h' so the reader knows what it is good for + + printf("//\n"); + printf("// DO NOT EDIT THIS FILE !\n"); + printf("//\n"); + printf("// This file must be generated by \"util/cmap.cxx\".\n"); + printf("// See instructions in this file.\n"); + printf("//\n"); + printf("// Copyright 1998-%d by Bill Spitzak and others.\n", year); + printf("//\n"); + printf("// This library is free software. Distribution and use rights are outlined in\n"); + printf("// the file \"COPYING\" which should have been included with this file. If this\n"); + printf("// file is missing or damaged, see the license at:\n"); + printf("//\n"); + printf("// https://www.fltk.org/COPYING.php\n"); + printf("//\n"); + printf("// Please see the following page on how to report bugs and issues:\n"); + printf("//\n"); + printf("// https://www.fltk.org/bugs.php\n"); + printf("//\n"); + + // write color map values + + for (i = 0; i < 256; i++) { + printf(" 0x%02x%02x%02x00", cmap[i][0], cmap[i][1], cmap[i][2]); + if (i < 255) + printf(", // %3d\n", i); + else + printf(" // %3d\n", i); + } + + // write final comment + + printf("//\n"); + printf("// End of fl_cmap.h - generated by cmap.cxx\n"); + printf("//\n"); + + return 0; +} |