1 | // |
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2 | // "$Id$" |
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3 | // |
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4 | // Private colormap support for the Fast Light Tool Kit (FLTK). |
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5 | // |
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6 | // Copyright 1998-2005 by Bill Spitzak and others. |
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7 | // |
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8 | // This library is free software; you can redistribute it and/or |
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9 | // modify it under the terms of the GNU Library General Public |
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10 | // License as published by the Free Software Foundation; either |
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11 | // version 2 of the License, or (at your option) any later version. |
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12 | // |
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13 | // This library is distributed in the hope that it will be useful, |
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14 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
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15 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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16 | // Library General Public License for more details. |
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17 | // |
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18 | // You should have received a copy of the GNU Library General Public |
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19 | // License along with this library; if not, write to the Free Software |
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20 | // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 |
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21 | // USA. |
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22 | // |
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23 | // Please report all bugs and problems on the following page: |
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24 | // |
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25 | // http://www.fltk.org/str.php |
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26 | // |
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27 | |
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28 | // Using the default system colormap can be a bad idea on PseudoColor |
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29 | // visuals, since typically every application uses the default colormap and |
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30 | // you can run out of colormap entries easily. |
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31 | // |
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32 | // The solution is to always create a new colormap on PseudoColor displays |
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33 | // and copy the first 16 colors from the default colormap so that we won't |
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34 | // get huge color changes when switching windows. |
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35 | |
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36 | #include <config.h> |
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37 | #include <FL/Fl.H> |
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38 | #include <FL/x.H> |
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39 | |
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40 | #ifdef WIN32 |
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41 | // There is probably something relevant to do on MSWindows 8-bit displays |
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42 | // but I don't know what it is |
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43 | |
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44 | void Fl::own_colormap() {} |
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45 | |
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46 | #elif defined(__APPLE__) |
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47 | // MacOS X always provides a TrueColor interface... |
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48 | |
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49 | void Fl::own_colormap() {} |
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50 | #else |
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51 | // X version |
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52 | |
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53 | void Fl::own_colormap() { |
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54 | fl_open_display(); |
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55 | #if USE_COLORMAP |
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56 | switch (fl_visual->c_class) { |
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57 | case GrayScale : |
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58 | case PseudoColor : |
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59 | case DirectColor : |
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60 | break; |
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61 | default: |
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62 | return; // don't do anything for non-colormapped visuals |
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63 | } |
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64 | int i; |
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65 | XColor colors[16]; |
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66 | // Get the first 16 colors from the default colormap... |
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67 | for (i = 0; i < 16; i ++) colors[i].pixel = i; |
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68 | XQueryColors(fl_display, fl_colormap, colors, 16); |
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69 | // Create a new colormap... |
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70 | fl_colormap = XCreateColormap(fl_display, |
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71 | RootWindow(fl_display,fl_screen), |
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72 | fl_visual->visual, AllocNone); |
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73 | // Copy those first 16 colors to our own colormap: |
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74 | for (i = 0; i < 16; i ++) |
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75 | XAllocColor(fl_display, fl_colormap, colors + i); |
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76 | #endif |
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77 | } |
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78 | |
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79 | #endif |
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80 | |
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81 | // |
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82 | // End of "$Id$". |
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83 | // |
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