xorg-server-1.4/hw/dmx/dmxvisual.c

   1 /*
   2  * Copyright 2002-2004 Red Hat Inc., Durham, North Carolina.
   3  *
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining
   7  * a copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation on the rights to use, copy, modify, merge,
  10  * publish, distribute, sublicense, and/or sell copies of the Software,
  11  * and to permit persons to whom the Software is furnished to do so,
  12  * subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial
  16  * portions of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  21  * NON-INFRINGEMENT.  IN NO EVENT SHALL RED HAT AND/OR THEIR SUPPLIERS
  22  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  23  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  24  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  25  * SOFTWARE.
  26  */
  27
  28 /*
  29  * Authors:
  30  *   Kevin E. Martin <kem@redhat.com>
  31  *
  32  */
  33
  34 /** \file
  35  * This file provides support for visuals. */
  36
  37 #ifdef HAVE_DMX_CONFIG_H
  38 #include <dmx-config.h>
  39 #endif
  40
  41 #include "dmx.h"
  42 #include "dmxvisual.h"
  43
  44 #include "scrnintstr.h"
  45
  46 #ifdef GLXEXT
  47
  48 #include <GL/glxint.h>
  49
  50 extern VisualID glxMatchVisualInConfigList(ScreenPtr pScreen,
  51                                            VisualPtr pVisual,
  52                                            __GLXvisualConfig *configs,
  53                                            int nconfigs);
  54
  55 static Visual *dmxLookupGLXVisual(ScreenPtr pScreen, VisualPtr pVisual)
  56 {
  57     DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];
  58     int            j;
  59     VisualID       vid;
  60
  61     vid = glxMatchVisualInConfigList(pScreen, pVisual,
  62                                      dmxScreen->glxVisuals,
  63                                      dmxScreen->numGlxVisuals);
  64     if (vid) {
  65         /* Find the X visual of the matching GLX visual */
  66         for (j = 0; j < dmxScreen->beNumVisuals; j++)
  67             if (vid == dmxScreen->beVisuals[j].visualid)
  68                 return dmxScreen->beVisuals[j].visual;
  69     }
  70
  71     /* No matching visual found */
  72     return NULL;
  73 }
  74 #endif
  75
  76 /** Return the visual that matched \a pVisual. */
  77 Visual *dmxLookupVisual(ScreenPtr pScreen, VisualPtr pVisual)
  78 {
  79     DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];
  80     int            i;
  81 #ifdef GLXEXT
  82     Visual        *retval;
  83 #endif
  84
  85     if (!dmxScreen->beDisplay)
  86         return NULL;
  87
  88 #ifdef GLXEXT
  89     if ((retval = dmxLookupGLXVisual(pScreen, pVisual)))
  90         return retval;
  91 #endif
  92
  93     for (i = 0; i < dmxScreen->beNumVisuals; i++) {
  94         if (pVisual->class == dmxScreen->beVisuals[i].class &&
  95             pVisual->bitsPerRGBValue == dmxScreen->beVisuals[i].bits_per_rgb &&
  96             pVisual->ColormapEntries == dmxScreen->beVisuals[i].colormap_size &&
  97             pVisual->nplanes == dmxScreen->beVisuals[i].depth &&
  98             pVisual->redMask == dmxScreen->beVisuals[i].red_mask &&
  99             pVisual->greenMask == dmxScreen->beVisuals[i].green_mask &&
 100             pVisual->blueMask == dmxScreen->beVisuals[i].blue_mask) {
 101             return dmxScreen->beVisuals[i].visual;
 102         }
 103     }
 104
 105     return NULL;
 106 }
 107
 108 /** Return the visual that matched the \a vid. */
 109 Visual *dmxLookupVisualFromID(ScreenPtr pScreen, VisualID vid)
 110 {
 111     Visual *visual;
 112     int     i;
 113
 114     if (!dmxScreens[pScreen->myNum].beDisplay)
 115         return NULL;
 116
 117     for (i = 0; i < pScreen->numVisuals; i++) {
 118         if (pScreen->visuals[i].vid == vid) {
 119             visual = dmxLookupVisual(pScreen, &pScreen->visuals[i]);
 120             if (visual) return visual;
 121         }
 122     }
 123
 124     return NULL;
 125 }
 126
 127 /** Return the colormap for the \a visual. */
 128 Colormap dmxColormapFromDefaultVisual(ScreenPtr pScreen, Visual *visual)
 129 {
 130     DMXScreenInfo *dmxScreen = &dmxScreens[pScreen->myNum];
 131     int            i;
 132
 133     if (dmxScreen->beDisplay) {
 134         for (i = 0; i < dmxScreen->beNumDefColormaps; i++)
 135             if (visual == dmxScreen->beVisuals[i].visual)
 136                 return dmxScreen->beDefColormaps[i];
 137     }
 138
 139     return None;
 140 }