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// -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
// Display.cc for Blackbox - an X11 Window manager
// Copyright (c) 2001 - 2005 Sean 'Shaleh' Perry <shaleh@debian.org>
// Copyright (c) 1997 - 2000, 2002 - 2005
// Bradley T Hughes <bhughes at trolltech.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// 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 AUTHORS OR COPYRIGHT HOLDERS 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.
#include "Display.hh"
#include <algorithm>
#include <X11/Xutil.h>
#include <assert.h>
#include <fcntl.h>
#include <stdio.h>
namespace bt {
void createBitmapLoader(const Display &display);
void destroyBitmapLoader(void);
void createColorCache(const Display &display);
void destroyColorCache(void);
void createFontCache(const Display &display);
void destroyFontCache(void);
void createPenCache(const Display &display);
void destroyPenCache(void);
void createPixmapCache(const Display &display);
void destroyPixmapCache(void);
void destroyColorTables(void);
#ifdef MITSHM
void startupShm(const Display &display);
#endif // MITSHM
} // namespace bt
bt::Display::Display(const char *dpy_name, bool multi_head) {
if (!(xdisplay = XOpenDisplay(dpy_name))) {
fprintf(stderr, "bt::Display: failed to open display '%s'\n",
dpy_name ? dpy_name : "");
::exit(2);
}
#ifdef DEBUG
XSynchronize(xdisplay, True);
#endif // DEBUG
if (fcntl(XConnectionNumber(xdisplay), F_SETFD, 1) == -1) {
fprintf(stderr, "bt::Display: failed to mark connection close-on-exec\n");
::exit(2);
}
if (!multi_head || ScreenCount(xdisplay) == 1) {
screen_info_count = 1;
screen_info_list = new bt::ScreenInfo*[screen_info_count];
screen_info_list[0] = new bt::ScreenInfo(*this, DefaultScreen(xdisplay));
} else {
screen_info_count = ScreenCount(xdisplay);
screen_info_list = new bt::ScreenInfo*[screen_info_count];
for (unsigned int i = 0; i < screen_info_count; ++i)
screen_info_list[i] = new bt::ScreenInfo(*this, i);
}
createBitmapLoader(*this);
createColorCache(*this);
createFontCache(*this);
createPenCache(*this);
createPixmapCache(*this);
#ifdef MITSHM
startupShm(*this);
#endif // MITSHM
}
bt::Display::~Display() {
destroyColorTables();
destroyPixmapCache();
destroyPenCache();
destroyFontCache();
destroyColorCache();
destroyBitmapLoader();
std::for_each(screen_info_list, screen_info_list + screen_info_count,
bt::PointerAssassin());
delete [] screen_info_list;
XCloseDisplay(xdisplay);
}
const bt::ScreenInfo &bt::Display::screenInfo(unsigned int i) const {
if (screen_info_count == 1)
return *(screen_info_list[0]);
assert(i < screen_info_count);
return *screen_info_list[i];
}
bt::ScreenInfo::ScreenInfo(bt::Display& d, unsigned int num)
: _display(d), _screennumber(num)
{
_rootwindow = RootWindow(_display.XDisplay(), _screennumber);
_rect.setSize(WidthOfScreen(ScreenOfDisplay(_display.XDisplay(),
_screennumber)),
HeightOfScreen(ScreenOfDisplay(_display.XDisplay(),
_screennumber)));
/*
If the default depth is at least 8 we will use that,
otherwise we try to find the largest TrueColor visual.
Preference is given to 24 bit over larger depths if 24 bit is an option.
*/
_depth = DefaultDepth(_display.XDisplay(), _screennumber);
_visual = DefaultVisual(_display.XDisplay(), _screennumber);
_colormap = DefaultColormap(_display.XDisplay(), _screennumber);
if (_depth < 8) {
// search for a TrueColor Visual... if we can't find one...
// we will use the default visual for the screen
XVisualInfo vinfo_template, *vinfo_return;
int vinfo_nitems;
int best = -1;
vinfo_template.screen = _screennumber;
vinfo_template.c_class = TrueColor;
vinfo_return = XGetVisualInfo(_display.XDisplay(),
VisualScreenMask | VisualClassMask,
&vinfo_template, &vinfo_nitems);
if (vinfo_return) {
int max_depth = 1;
for (int i = 0; i < vinfo_nitems; ++i) {
if (vinfo_return[i].depth < max_depth ||
// prefer 24 bit over 32
(max_depth == 24 && vinfo_return[i].depth > 24))
continue;
max_depth = vinfo_return[i].depth;
best = i;
}
if (max_depth < _depth) best = -1;
}
if (best != -1) {
_depth = vinfo_return[best].depth;
_visual = vinfo_return[best].visual;
_colormap = XCreateColormap(_display.XDisplay(), _rootwindow,
_visual, AllocNone);
}
XFree(vinfo_return);
}
// get the default display string and strip the screen number
std::string default_string = DisplayString(_display.XDisplay());
const std::string::size_type pos = default_string.rfind(".");
if (pos != std::string::npos)
default_string.resize(pos);
_displaystring = std::string("DISPLAY=") + default_string + '.' +
bt::itostring(_screennumber);
}
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