123 lines
3.8 KiB
C++
123 lines
3.8 KiB
C++
// -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
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#ifdef HAVE_CONFIG_H
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# include "../config.h"
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#endif // HAVE_CONFIG_H
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extern "C" {
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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}
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#include "screeninfo.hh"
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#include "display.hh"
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#include "util.hh"
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using std::string;
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namespace otk {
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ScreenInfo::ScreenInfo(unsigned int num) {
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_screen = num;
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_root_window = RootWindow(**display, _screen);
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_rect.setSize(WidthOfScreen(ScreenOfDisplay(**display,
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_screen)),
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HeightOfScreen(ScreenOfDisplay(**display,
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_screen)));
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/*
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If the default depth is at least 8 we will use that,
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otherwise we try to find the largest TrueColor visual.
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Preference is given to 24 bit over larger depths if 24 bit is an option.
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*/
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_depth = DefaultDepth(**display, _screen);
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_visual = DefaultVisual(**display, _screen);
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_colormap = DefaultColormap(**display, _screen);
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if (_depth < 8) {
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// search for a TrueColor Visual... if we can't find one...
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// we will use the default visual for the screen
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XVisualInfo vinfo_template, *vinfo_return;
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int vinfo_nitems;
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int best = -1;
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vinfo_template.screen = _screen;
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vinfo_template.c_class = TrueColor;
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vinfo_return = XGetVisualInfo(**display,
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VisualScreenMask | VisualClassMask,
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&vinfo_template, &vinfo_nitems);
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if (vinfo_return) {
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int max_depth = 1;
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for (int i = 0; i < vinfo_nitems; ++i) {
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if (vinfo_return[i].depth > max_depth) {
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if (max_depth == 24 && vinfo_return[i].depth > 24)
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break; // prefer 24 bit over 32
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max_depth = vinfo_return[i].depth;
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best = i;
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}
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}
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if (max_depth < _depth) best = -1;
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}
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if (best != -1) {
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_depth = vinfo_return[best].depth;
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_visual = vinfo_return[best].visual;
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_colormap = XCreateColormap(**display, _root_window, _visual,
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AllocNone);
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}
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XFree(vinfo_return);
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}
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// get the default display string and strip the screen number
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string default_string = DisplayString(**display);
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const string::size_type pos = default_string.rfind(".");
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if (pos != string::npos)
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default_string.resize(pos);
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_display_string = string("DISPLAY=") + default_string + '.' +
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itostring(static_cast<unsigned long>(_screen));
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#if 0 //def XINERAMA
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_xinerama_active = False;
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if (d->hasXineramaExtensions()) {
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if (d->getXineramaMajorVersion() == 1) {
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// we know the version 1(.1?) protocol
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/*
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in this version of Xinerama, we can't query on a per-screen basis, but
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in future versions we should be able, so the 'activeness' is checked
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on a pre-screen basis anyways.
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*/
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if (XineramaIsActive(**display)) {
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/*
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If Xinerama is being used, there there is only going to be one screen
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present. We still, of course, want to use the screen class, but that
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is why no screen number is used in this function call. There should
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never be more than one screen present with Xinerama active.
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*/
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int num;
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XineramaScreenInfo *info = XineramaQueryScreens(**display, &num);
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if (num > 0 && info) {
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_xinerama_areas.reserve(num);
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for (int i = 0; i < num; ++i) {
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_xinerama_areas.push_back(Rect(info[i].x_org, info[i].y_org,
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info[i].width, info[i].height));
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}
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XFree(info);
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// if we can't find any xinerama regions, then we act as if it is not
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// active, even though it said it was
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_xinerama_active = True;
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}
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}
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}
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}
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#endif // XINERAMA
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}
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}
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