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Diffstat (limited to 'mfb/mfbcmap.c')
| -rw-r--r-- | mfb/mfbcmap.c | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/mfb/mfbcmap.c b/mfb/mfbcmap.c new file mode 100644 index 000000000..656c9daf6 --- /dev/null +++ b/mfb/mfbcmap.c @@ -0,0 +1,198 @@ +/*********************************************************** + +Copyright 1987, 1998 The Open Group + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN +AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of The Open Group shall not be +used in advertising or otherwise to promote the sale, use or other dealings +in this Software without prior written authorization from The Open Group. + + +Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts. + + All Rights Reserved + +Permission to use, copy, modify, and distribute this software and its +documentation for any purpose and without fee is hereby granted, +provided that the above copyright notice appear in all copies and that +both that copyright notice and this permission notice appear in +supporting documentation, and that the name of Digital not be +used in advertising or publicity pertaining to distribution of the +software without specific, written prior permission. + +DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING +ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL +DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR +ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, +WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, +ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS +SOFTWARE. + +******************************************************************/ +/* $Xorg: mfbcmap.c,v 1.4 2001/02/09 02:05:18 xorgcvs Exp $ */ +#include "X.h" +#include "scrnintstr.h" +#include "colormapst.h" +#include "resource.h" + +/* A monochrome frame buffer is a static gray colormap with two entries. + * We have a "required list" of length 1. Because we can only support 1 + * colormap, we never have to change it, but we may have to change the + * name we call it. If someone installs a new colormap, we know it must + * look just like the old one (because we've checked in dispatch that it was + * a valid colormap identifier, and all the colormap IDs for this device + * look the same). Nevertheless, we still have to uninstall the old colormap + * and install the new one. Similarly, if someone uninstalls a colormap, + * we have to install the default map, even though we know those two looked + * alike. + * The required list concept is pretty much irrelevant when you can only + * have one map installed at a time. + */ +static ColormapPtr InstalledMaps[MAXSCREENS]; + +int +mfbListInstalledColormaps(pScreen, pmaps) + ScreenPtr pScreen; + Colormap *pmaps; +{ + /* By the time we are processing requests, we can guarantee that there + * is always a colormap installed */ + *pmaps = InstalledMaps[pScreen->myNum]->mid; + return (1); +} + + +void +mfbInstallColormap(pmap) + ColormapPtr pmap; +{ + int index = pmap->pScreen->myNum; + ColormapPtr oldpmap = InstalledMaps[index]; + + if(pmap != oldpmap) + { + /* Uninstall pInstalledMap. No hardware changes required, just + * notify all interested parties. */ + if(oldpmap != (ColormapPtr)None) + WalkTree(pmap->pScreen, TellLostMap, (pointer)&oldpmap->mid); + /* Install pmap */ + InstalledMaps[index] = pmap; + WalkTree(pmap->pScreen, TellGainedMap, (pointer)&pmap->mid); + + } +} + +void +mfbUninstallColormap(pmap) + ColormapPtr pmap; +{ + int index = pmap->pScreen->myNum; + ColormapPtr curpmap = InstalledMaps[index]; + + if(pmap == curpmap) + { + if (pmap->mid != pmap->pScreen->defColormap) + { + curpmap = (ColormapPtr) LookupIDByType(pmap->pScreen->defColormap, + RT_COLORMAP); + (*pmap->pScreen->InstallColormap)(curpmap); + } + } +} + +/*ARGSUSED*/ +void +mfbResolveColor (pred, pgreen, pblue, pVisual) + unsigned short *pred; + unsigned short *pgreen; + unsigned short *pblue; + VisualPtr pVisual; +{ + /* + * Gets intensity from RGB. If intensity is >= half, pick white, else + * pick black. This may well be more trouble than it's worth. + */ + *pred = *pgreen = *pblue = + (((30L * *pred + + 59L * *pgreen + + 11L * *pblue) >> 8) >= (((1<<8)-1)*50)) ? ~0 : 0; +} + +Bool +mfbCreateColormap(pMap) + ColormapPtr pMap; +{ + ScreenPtr pScreen; + unsigned short red0, green0, blue0; + unsigned short red1, green1, blue1; + Pixel pix; + + pScreen = pMap->pScreen; + if (pScreen->whitePixel == 0) + { + red0 = green0 = blue0 = ~0; + red1 = green1 = blue1 = 0; + } + else + { + red0 = green0 = blue0 = 0; + red1 = green1 = blue1 = ~0; + } + + /* this is a monochrome colormap, it only has two entries, just fill + * them in by hand. If it were a more complex static map, it would be + * worth writing a for loop or three to initialize it */ + + /* this will be pixel 0 */ + pix = 0; + if (AllocColor(pMap, &red0, &green0, &blue0, &pix, 0) != Success) + return FALSE; + + /* this will be pixel 1 */ + if (AllocColor(pMap, &red1, &green1, &blue1, &pix, 0) != Success) + return FALSE; + return TRUE; +} + +/*ARGSUSED*/ +void +mfbDestroyColormap (pMap) + ColormapPtr pMap; +{ + return; +} + +Bool +mfbCreateDefColormap (pScreen) + ScreenPtr pScreen; +{ + VisualPtr pVisual; + ColormapPtr pColormap; + + for (pVisual = pScreen->visuals; + pVisual->vid != pScreen->rootVisual; + pVisual++) + ; + if (CreateColormap (pScreen->defColormap, pScreen, pVisual, + &pColormap, AllocNone, 0) != Success) + { + return FALSE; + } + (*pScreen->InstallColormap) (pColormap); + return TRUE; +} |