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/* Copyright (c) Mark J. Kilgard, 1996. */
/* This program is freely distributable without licensing fees
and is provided without guarantee or warrantee expressed or
implied. This program is -not- in the public domain. */
#include <stdlib.h>
#include "sovLayerUtil.h"
static Bool layersRead;
static Atom overlayVisualsAtom;
static sovOverlayInfo **overlayInfoPerScreen;
static int *numOverlaysPerScreen;
sovVisualInfo *
sovGetVisualInfo(Display *display, long lvinfo_mask,
sovVisualInfo *lvinfo_template, int *nitems_return)
{
XVisualInfo *vinfo;
sovVisualInfo *layerInfo;
Window root;
Status status;
Atom actualType;
unsigned long sizeData, bytesLeft;
int actualFormat, numVisuals, numScreens, count, i, j;
vinfo = XGetVisualInfo(display, lvinfo_mask & VisualAllMask,
&lvinfo_template->vinfo, nitems_return);
if (vinfo == NULL)
return NULL;
numVisuals = *nitems_return;
if (layersRead == False) {
overlayVisualsAtom = XInternAtom(display,
"SERVER_OVERLAY_VISUALS", True);
if (overlayVisualsAtom != None) {
numScreens = ScreenCount(display);
overlayInfoPerScreen = (sovOverlayInfo **)
malloc(numScreens * sizeof(sovOverlayInfo *));
numOverlaysPerScreen = (int *) malloc(numScreens * sizeof(int));
if (overlayInfoPerScreen != NULL &&
numOverlaysPerScreen != NULL) {
for (i = 0; i < numScreens; i++) {
root = RootWindow(display, i);
status = XGetWindowProperty(display, root, overlayVisualsAtom,
0L, (long) 10000, False, overlayVisualsAtom,
&actualType, &actualFormat,
&sizeData, &bytesLeft,
(unsigned char **) &overlayInfoPerScreen[i]);
if (status != Success ||
actualType != overlayVisualsAtom ||
actualFormat != 32 || sizeData < 4)
numOverlaysPerScreen[i] = 0;
else
numOverlaysPerScreen[i] = sizeData / 4;
}
layersRead = True;
} else {
if (overlayInfoPerScreen != NULL)
free(overlayInfoPerScreen);
if (numOverlaysPerScreen != NULL)
free(numOverlaysPerScreen);
}
}
}
layerInfo = (sovVisualInfo *)
malloc(numVisuals * sizeof(sovVisualInfo));
if (layerInfo == NULL) {
XFree(vinfo);
return NULL;
}
count = 0;
for (i = 0; i < numVisuals; i++) {
XVisualInfo *pVinfo;
int screen;
sovOverlayInfo *overlayInfo;
pVinfo = &vinfo[i];
screen = pVinfo->screen;
overlayInfo = NULL;
if (layersRead) {
for (j = 0; j < numOverlaysPerScreen[screen]; j++)
if (pVinfo->visualid ==
overlayInfoPerScreen[screen][j].overlay_visual) {
overlayInfo = &overlayInfoPerScreen[screen][j];
break;
}
}
if (lvinfo_mask & VisualLayerMask)
if (overlayInfo == NULL) {
if (lvinfo_template->layer != 0)
continue;
} else if (lvinfo_template->layer != overlayInfo->layer)
continue;
if (lvinfo_mask & VisualTransparentType)
if (overlayInfo == NULL) {
if (lvinfo_template->type != None)
continue;
} else if (lvinfo_template->type !=
overlayInfo->transparent_type)
continue;
if (lvinfo_mask & VisualTransparentValue)
if (overlayInfo == NULL)
/* non-overlay visuals have no sense of
TransparentValue */
continue;
else if (lvinfo_template->value != overlayInfo->value)
continue;
layerInfo[count].vinfo = *pVinfo;
if (overlayInfo == NULL) {
layerInfo[count].layer = 0;
layerInfo[count].type = None;
layerInfo[count].value = 0; /* meaningless */
} else {
layerInfo[count].layer = overlayInfo->layer;
layerInfo[count].type = overlayInfo->transparent_type;
layerInfo[count].value = overlayInfo->value;
}
count++;
}
XFree(vinfo);
*nitems_return = count;
if (count == 0) {
XFree(layerInfo);
return NULL;
} else
return layerInfo;
}
Status
sovMatchVisualInfo(Display *display, int screen,
int depth, int class, int layer, sovVisualInfo *lvinfo_return)
{
sovVisualInfo *lvinfo;
sovVisualInfo lvinfoTemplate;
int nitems;
lvinfoTemplate.vinfo.screen = screen;
lvinfoTemplate.vinfo.depth = depth;
lvinfoTemplate.vinfo.class = class;
lvinfoTemplate.layer = layer;
lvinfo = sovGetVisualInfo(display,
VisualScreenMask|VisualDepthMask|VisualClassMask|VisualLayerMask,
&lvinfoTemplate, &nitems);
if (lvinfo != NULL && nitems > 0) {
*lvinfo_return = *lvinfo;
return 1;
} else
return 0;
}
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