glfw/src/x11_fullscreen.c

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//========================================================================
// GLFW - An OpenGL library
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// Platform: X11/GLX
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// API version: 3.0
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// WWW: http://www.glfw.org/
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Marcus Geelnard
// Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.org>
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would
// be appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not
// be misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//
//========================================================================
#include "internal.h"
#include <limits.h>
#include <stdlib.h>
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//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
//////////////////////////////////////////////////////////////////////////
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//========================================================================
// Finds the video mode closest in size to the specified desired size
//========================================================================
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int _glfwGetClosestVideoMode(int* width, int* height, int* rate)
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{
int i, match, bestmatch;
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if (_glfwLibrary.X11.RandR.available)
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{
#if defined(_GLFW_HAS_XRANDR)
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int sizecount, bestsize;
int ratecount, bestrate;
short* ratelist;
XRRScreenConfiguration* sc;
XRRScreenSize* sizelist;
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sc = XRRGetScreenInfo(_glfwLibrary.X11.display, _glfwLibrary.X11.root);
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sizelist = XRRConfigSizes(sc, &sizecount);
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// Find the best matching mode
bestsize = -1;
bestmatch = INT_MAX;
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for (i = 0; i < sizecount; i++)
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{
match = (*width - sizelist[i].width) *
(*width - sizelist[i].width) +
(*height - sizelist[i].height) *
(*height - sizelist[i].height);
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if (match < bestmatch)
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{
bestmatch = match;
bestsize = i;
}
}
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if (bestsize != -1)
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{
// Report width & height of best matching mode
*width = sizelist[bestsize].width;
*height = sizelist[bestsize].height;
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if (*rate > 0)
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{
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ratelist = XRRConfigRates(sc, bestsize, &ratecount);
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bestrate = -1;
bestmatch = INT_MAX;
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for (i = 0; i < ratecount; i++)
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{
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match = abs(ratelist[i] - *rate);
if (match < bestmatch)
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{
bestmatch = match;
bestrate = ratelist[i];
}
}
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if (bestrate != -1)
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*rate = bestrate;
}
}
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XRRFreeScreenConfigInfo(sc);
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if (bestsize != -1)
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return bestsize;
#endif /*_GLFW_HAS_XRANDR*/
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}
else if (_glfwLibrary.X11.VidMode.available)
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{
#if defined(_GLFW_HAS_XF86VIDMODE)
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XF86VidModeModeInfo** modelist;
int bestmode, modecount;
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// Get a list of all available display modes
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XF86VidModeGetAllModeLines(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen,
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&modecount, &modelist);
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// Find the best matching mode
bestmode = -1;
bestmatch = INT_MAX;
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for (i = 0; i < modecount; i++)
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{
match = (*width - modelist[i]->hdisplay) *
(*width - modelist[i]->hdisplay) +
(*height - modelist[i]->vdisplay) *
(*height - modelist[i]->vdisplay);
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if (match < bestmatch)
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{
bestmatch = match;
bestmode = i;
}
}
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if (bestmode != -1)
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{
// Report width & height of best matching mode
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*width = modelist[bestmode]->hdisplay;
*height = modelist[bestmode]->vdisplay;
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}
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XFree(modelist);
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if (bestmode != -1)
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return bestmode;
#endif /*_GLFW_HAS_XF86VIDMODE*/
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}
// Default: Simply use the screen resolution
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*width = DisplayWidth(_glfwLibrary.X11.display, _glfwLibrary.X11.screen);
*height = DisplayHeight(_glfwLibrary.X11.display, _glfwLibrary.X11.screen);
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return 0;
}
//========================================================================
// Change the current video mode
//========================================================================
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void _glfwSetVideoModeMODE(int mode, int rate)
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{
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if (_glfwLibrary.X11.RandR.available)
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{
#if defined(_GLFW_HAS_XRANDR)
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XRRScreenConfiguration* sc;
Window root;
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root = _glfwLibrary.X11.root;
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sc = XRRGetScreenInfo(_glfwLibrary.X11.display, root);
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// Remember old size and flag that we have changed the mode
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if (!_glfwLibrary.X11.FS.modeChanged)
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{
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_glfwLibrary.X11.FS.oldSizeID = XRRConfigCurrentConfiguration(sc, &_glfwLibrary.X11.FS.oldRotation);
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_glfwLibrary.X11.FS.oldWidth = DisplayWidth(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen);
_glfwLibrary.X11.FS.oldHeight = DisplayHeight(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen);
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_glfwLibrary.X11.FS.modeChanged = GL_TRUE;
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}
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if (rate > 0)
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{
// Set desired configuration
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XRRSetScreenConfigAndRate(_glfwLibrary.X11.display,
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sc,
root,
mode,
RR_Rotate_0,
(short) rate,
CurrentTime);
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}
else
{
// Set desired configuration
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XRRSetScreenConfig(_glfwLibrary.X11.display,
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sc,
root,
mode,
RR_Rotate_0,
CurrentTime);
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}
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XRRFreeScreenConfigInfo(sc);
#endif /*_GLFW_HAS_XRANDR*/
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}
else if (_glfwLibrary.X11.VidMode.available)
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{
#if defined(_GLFW_HAS_XF86VIDMODE)
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XF86VidModeModeInfo **modelist;
int modecount;
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// Get a list of all available display modes
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XF86VidModeGetAllModeLines(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen,
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&modecount, &modelist);
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// Unlock mode switch if necessary
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if (_glfwLibrary.X11.FS.modeChanged)
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{
XF86VidModeLockModeSwitch(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen,
0);
}
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// Change the video mode to the desired mode
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XF86VidModeSwitchToMode(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen,
modelist[mode]);
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// Set viewport to upper left corner (where our window will be)
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XF86VidModeSetViewPort(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen,
0, 0);
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// Lock mode switch
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XF86VidModeLockModeSwitch(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen,
1);
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// Remember old mode and flag that we have changed the mode
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if (!_glfwLibrary.X11.FS.modeChanged)
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{
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_glfwLibrary.X11.FS.oldMode = *modelist[0];
_glfwLibrary.X11.FS.modeChanged = GL_TRUE;
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}
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XFree(modelist);
#endif /*_GLFW_HAS_XF86VIDMODE*/
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}
}
//========================================================================
// Change the current video mode
//========================================================================
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void _glfwSetVideoMode(int* width, int* height, int* rate)
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{
int bestmode;
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// Find a best match mode
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bestmode = _glfwGetClosestVideoMode(width, height, rate);
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// Change mode
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_glfwSetVideoModeMODE(bestmode, *rate);
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}
//========================================================================
// Restore the previously saved (original) video mode
//========================================================================
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void _glfwRestoreVideoMode(void)
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{
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if (_glfwLibrary.X11.FS.modeChanged)
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{
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if (_glfwLibrary.X11.RandR.available)
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{
#if defined(_GLFW_HAS_XRANDR)
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XRRScreenConfiguration* sc;
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if (_glfwLibrary.X11.RandR.available)
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{
sc = XRRGetScreenInfo(_glfwLibrary.X11.display,
_glfwLibrary.X11.root);
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XRRSetScreenConfig(_glfwLibrary.X11.display,
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sc,
_glfwLibrary.X11.root,
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_glfwLibrary.X11.FS.oldSizeID,
_glfwLibrary.X11.FS.oldRotation,
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CurrentTime);
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XRRFreeScreenConfigInfo(sc);
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}
#endif /*_GLFW_HAS_XRANDR*/
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}
else if (_glfwLibrary.X11.VidMode.available)
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{
#if defined(_GLFW_HAS_XF86VIDMODE)
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// Unlock mode switch
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XF86VidModeLockModeSwitch(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen,
0);
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// Change the video mode back to the old mode
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XF86VidModeSwitchToMode(_glfwLibrary.X11.display,
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_glfwLibrary.X11.screen,
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&_glfwLibrary.X11.FS.oldMode);
#endif /*_GLFW_HAS_XF86VIDMODE*/
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}
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_glfwLibrary.X11.FS.modeChanged = GL_FALSE;
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}
}
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//////////////////////////////////////////////////////////////////////////
////// GLFW platform API //////
//////////////////////////////////////////////////////////////////////////
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struct _glfwResolution
{
int width;
int height;
};
//========================================================================
// List available video modes
//========================================================================
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int _glfwPlatformGetVideoModes(GLFWvidmode* list, int maxcount)
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{
int count, k, l, r, g, b, rgba, gl;
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int depth;
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XVisualInfo* vislist;
XVisualInfo dummy;
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int viscount, rgbcount, rescount;
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int* rgbarray;
struct _glfwResolution* resarray;
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// Get list of visuals
vislist = XGetVisualInfo(_glfwLibrary.X11.display, 0, &dummy, &viscount);
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if (vislist == NULL)
{
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_glfwSetError(GLFW_PLATFORM_ERROR,
"X11/GLX: Failed to retrieve the available visuals");
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return 0;
}
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rgbarray = (int*) malloc(sizeof(int) * viscount);
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rgbcount = 0;
// Build RGB array
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for (k = 0; k < viscount; k++)
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{
// Does the visual support OpenGL & true color?
glXGetConfig(_glfwLibrary.X11.display, &vislist[k], GLX_USE_GL, &gl);
glXGetConfig(_glfwLibrary.X11.display, &vislist[k], GLX_RGBA, &rgba);
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if (gl && rgba)
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{
// Get color depth for this visual
depth = vislist[k].depth;
// Convert to RGB
_glfwSplitBPP(depth, &r, &g, &b);
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depth = (r << 16) | (g << 8) | b;
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// Is this mode unique?
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for (l = 0; l < rgbcount; l++)
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{
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if (depth == rgbarray[l])
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break;
}
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if (l >= rgbcount)
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{
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rgbarray[rgbcount] = depth;
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rgbcount++;
}
}
}
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XFree(vislist);
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rescount = 0;
resarray = NULL;
// Build resolution array
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if (_glfwLibrary.X11.RandR.available)
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{
#if defined(_GLFW_HAS_XRANDR)
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XRRScreenConfiguration* sc;
XRRScreenSize* sizelist;
int sizecount;
sc = XRRGetScreenInfo(_glfwLibrary.X11.display, _glfwLibrary.X11.root);
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sizelist = XRRConfigSizes(sc, &sizecount);
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resarray = (struct _glfwResolution*) malloc(sizeof(struct _glfwResolution) * sizecount);
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for (k = 0; k < sizecount; k++)
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{
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resarray[rescount].width = sizelist[k].width;
resarray[rescount].height = sizelist[k].height;
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rescount++;
}
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XRRFreeScreenConfigInfo(sc);
#endif /*_GLFW_HAS_XRANDR*/
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}
else if (_glfwLibrary.X11.VidMode.available)
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{
#if defined(_GLFW_HAS_XF86VIDMODE)
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XF86VidModeModeInfo** modelist;
int modecount, width, height;
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XF86VidModeGetAllModeLines(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen,
&modecount, &modelist);
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resarray = (struct _glfwResolution*) malloc(sizeof(struct _glfwResolution) * modecount);
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for (k = 0; k < modecount; k++)
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{
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width = modelist[k]->hdisplay;
height = modelist[k]->vdisplay;
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// Is this mode unique?
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for (l = 0; l < rescount; l++)
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{
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if (width == resarray[l].width && height == resarray[l].height)
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break;
}
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if (l >= rescount)
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{
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resarray[rescount].width = width;
resarray[rescount].height = height;
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rescount++;
}
}
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XFree(modelist);
#endif /*_GLFW_HAS_XF86VIDMODE*/
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}
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if (!resarray)
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{
rescount = 1;
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resarray = (struct _glfwResolution*) malloc(sizeof(struct _glfwResolution) * rescount);
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resarray[0].width = DisplayWidth(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen);
resarray[0].height = DisplayHeight(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen);
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}
// Build permutations of colors and resolutions
count = 0;
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for (k = 0; k < rgbcount && count < maxcount; k++)
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{
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for (l = 0; l < rescount && count < maxcount; l++)
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{
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list[count].width = resarray[l].width;
list[count].height = resarray[l].height;
list[count].redBits = (rgbarray[k] >> 16) & 255;
list[count].greenBits = (rgbarray[k] >> 8) & 255;
list[count].blueBits = rgbarray[k] & 255;
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count++;
}
}
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free(resarray);
free(rgbarray);
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return count;
}
//========================================================================
// Get the desktop video mode
//========================================================================
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void _glfwPlatformGetDesktopMode(GLFWvidmode* mode)
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{
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int bpp;
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// Get and split display depth
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bpp = DefaultDepth(_glfwLibrary.X11.display, _glfwLibrary.X11.screen);
_glfwSplitBPP(bpp, &mode->redBits, &mode->greenBits, &mode->blueBits);
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if (_glfwLibrary.X11.FS.modeChanged)
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{
if (_glfwLibrary.X11.RandR.available)
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{
#if defined(_GLFW_HAS_XRANDR)
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mode->width = _glfwLibrary.X11.FS.oldWidth;
mode->height = _glfwLibrary.X11.FS.oldHeight;
#endif /*_GLFW_HAS_XRANDR*/
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}
else if (_glfwLibrary.X11.VidMode.available)
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{
#if defined(_GLFW_HAS_XF86VIDMODE)
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mode->width = _glfwLibrary.X11.FS.oldMode.hdisplay;
mode->height = _glfwLibrary.X11.FS.oldMode.vdisplay;
#endif /*_GLFW_HAS_XF86VIDMODE*/
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}
}
else
{
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mode->width = DisplayWidth(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen);
mode->height = DisplayHeight(_glfwLibrary.X11.display,
_glfwLibrary.X11.screen);
}
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}