Ben Anderson
198 lines
5.0 KiB
C++
198 lines
5.0 KiB
C++
#include "global.h"
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#include "X11Helper.h"
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#include <X11/Xlib.h>
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#include "RageLog.h"
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#include "RageDisplay.h"
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#include "RageThreads.h"
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// Currently open masks:
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static vector<long> g_aiMasks;
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// Number of subsystems using the X connection:
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static int g_iRefCount = 0;
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// Do we have a window?
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static bool g_bHaveWin = false;
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Display *X11Helper::Dpy = NULL;
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Window X11Helper::Win;
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int protoErrorCallback( Display*, XErrorEvent* );
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int protoFatalCallback( Display* );
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bool X11Helper::Go()
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{
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if( g_iRefCount == 0 )
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{
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Dpy = XOpenDisplay(0);
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if( Dpy == NULL )
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return false;
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XSetIOErrorHandler( &protoFatalCallback );
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XSetErrorHandler( &protoErrorCallback );
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}
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g_iRefCount++;
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return true;
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}
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void X11Helper::Stop()
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{
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g_iRefCount--;
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if( g_iRefCount == 0 )
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{
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XCloseDisplay( Dpy );
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Dpy = NULL; // For sanity's sake
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g_aiMasks.clear();
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}
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}
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static bool pApplyMasks();
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bool X11Helper::OpenMask( long mask )
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{
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g_aiMasks.push_back(mask);
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return pApplyMasks();
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}
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bool X11Helper::CloseMask( long mask )
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{
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vector<long>::iterator i = find( g_aiMasks.begin(), g_aiMasks.end(), mask );
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if( i == g_aiMasks.end() )
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return true;
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g_aiMasks.erase( i );
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return pApplyMasks();
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}
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static bool pApplyMasks()
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{
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if( X11Helper::Dpy == NULL || !g_bHaveWin )
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return true;
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LOG->Trace("X11Helper: Reapplying event masks.");
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long iMask = 0;
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for( unsigned i = 0; i < g_aiMasks.size(); ++i )
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iMask |= g_aiMasks[i];
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if( XSelectInput(X11Helper::Dpy, X11Helper::Win, iMask) == 0 )
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return false;
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return true;
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}
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bool X11Helper::MakeWindow( int screenNum, int depth, Visual *visual, int width, int height, bool overrideRedirect )
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{
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if( g_iRefCount == 0 )
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return false;
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if( g_bHaveWin )
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{
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XDestroyWindow( Dpy, Win );
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g_bHaveWin = false;
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}
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// pHaveWin will stay false if an error occurs once I do error
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// checking here...
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Win = CreateWindow( screenNum, depth, visual, width, height, overrideRedirect );
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g_bHaveWin = true;
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return true;
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}
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Window X11Helper::CreateWindow( int screenNum, int depth, Visual *visual, int width, int height, bool overrideRedirect )
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{
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vector<long>::iterator i;
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XSetWindowAttributes winAttribs;
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winAttribs.border_pixel = 0;
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winAttribs.event_mask = 0;
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i = g_aiMasks.begin();
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while( i != g_aiMasks.end() )
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{
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winAttribs.event_mask |= *i;
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i++;
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}
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// XXX: Error catching/handling?
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winAttribs.colormap = XCreateColormap( Dpy, RootWindow(Dpy, screenNum), visual, AllocNone );
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Window Win;
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if( overrideRedirect )
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{
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winAttribs.override_redirect = True;
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Win = XCreateWindow( Dpy, RootWindow(Dpy, screenNum), 0, 0, width,
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height, 0, depth, InputOutput, visual,
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CWBorderPixel | CWColormap | CWEventMask | CWOverrideRedirect, &winAttribs );
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}
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else
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{
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Win = XCreateWindow( Dpy, RootWindow(Dpy, screenNum), 0, 0, width,
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height, 0, depth, InputOutput, visual,
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CWBorderPixel | CWColormap | CWEventMask, &winAttribs );
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}
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/* Hide the mouse cursor. */
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{
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const char pBlank[] = { 0,0,0,0,0,0,0,0 };
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Pixmap BlankBitmap = XCreateBitmapFromData( Dpy, Win, pBlank, 8, 8 );
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XColor black = { 0, 0, 0, 0, 0, 0 };
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Cursor pBlankPointer = XCreatePixmapCursor( Dpy, BlankBitmap, BlankBitmap, &black, &black, 0, 0 );
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XFreePixmap( Dpy, BlankBitmap );
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XDefineCursor( Dpy, Win, pBlankPointer );
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XFreeCursor( Dpy, pBlankPointer );
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}
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return Win;
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}
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int protoErrorCallback( Display *d, XErrorEvent *err )
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{
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char errText[512];
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XGetErrorText( d, err->error_code, errText, 512 );
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LOG->Warn( "X11 Protocol error %s (%d) has occurred, caused by request %d,%d, resource ID %d",
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errText, err->error_code, err->request_code, err->minor_code, err->resourceid );
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return 0; // Xlib ignores our return value
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}
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int protoFatalCallback( Display *d )
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{
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RageException::Throw( "Fatal I/O error communicating with X server." );
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}
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/*
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* (c) 2005 Ben Anderson
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, and/or sell copies of the Software, and to permit persons to
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* whom the Software is furnished to do so, provided that the above
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* copyright notice(s) and this permission notice appear in all copies of
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* the Software and that both the above copyright notice(s) and this
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* permission notice appear in supporting documentation.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF
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* THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
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* INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
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* OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
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* OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
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* OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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