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/*
* ***** BEGIN GPL LICENSE BLOCK *****
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
* All rights reserved.
*
* The Original Code is: all of this file.
*
* Video mode switching
* Copyright (C) 1997-2001 Id Software, Inc.
* Ported from Quake 2 by Alex Fraser <alex@phatcore.com>
*
* ***** END GPL LICENSE BLOCK *****
*/
/** \file ghost/intern/GHOST_DisplayManagerX11.cpp
* \ingroup GHOST
*/
#ifdef WITH_X11_XF86VMODE
# include <X11/Xlib.h>
# include <X11/extensions/xf86vmode.h>
#endif
#include "GHOST_DisplayManagerX11.h"
#include "GHOST_SystemX11.h"
GHOST_DisplayManagerX11::
GHOST_DisplayManagerX11(
GHOST_SystemX11 *system)
: GHOST_DisplayManager(),
m_system(system)
{
/* nothing to do. */
}
GHOST_TSuccess
GHOST_DisplayManagerX11::
getNumDisplays(GHOST_TUns8& numDisplays) const
{
numDisplays = m_system->getNumDisplays();
return GHOST_kSuccess;
}
GHOST_TSuccess
GHOST_DisplayManagerX11::
getNumDisplaySettings(
GHOST_TUns8 display,
GHOST_TInt32& numSettings) const
{
#ifdef WITH_X11_XF86VMODE
int majorVersion, minorVersion;
XF86VidModeModeInfo **vidmodes;
Display *dpy = m_system->getXDisplay();
GHOST_ASSERT(display < 1, "Only single display systems are currently supported.\n");
if (dpy == NULL)
return GHOST_kFailure;
majorVersion = minorVersion = 0;
if (!XF86VidModeQueryVersion(dpy, &majorVersion, &minorVersion)) {
fprintf(stderr, "Error: XF86VidMode extension missing!\n");
return GHOST_kFailure;
}
if (XF86VidModeGetAllModeLines(dpy, DefaultScreen(dpy), &numSettings, &vidmodes)) {
XFree(vidmodes);
}
#else
/* We only have one X11 setting at the moment. */
GHOST_ASSERT(display < 1, "Only single display systems are currently supported.\n");
numSettings = 1;
#endif
return GHOST_kSuccess;
}
/* from SDL2 */
#ifdef WITH_X11_XF86VMODE
static int
calculate_rate(XF86VidModeModeInfo *info)
{
return (info->htotal
&& info->vtotal) ? (1000 * info->dotclock / (info->htotal *
info->vtotal)) : 0;
}
#endif
GHOST_TSuccess
GHOST_DisplayManagerX11::
getDisplaySetting(
GHOST_TUns8 display,
GHOST_TInt32 index,
GHOST_DisplaySetting& setting) const
{
Display *dpy = m_system->getXDisplay();
if (dpy == NULL)
return GHOST_kFailure;
#ifdef WITH_X11_XF86VMODE
int majorVersion, minorVersion;
GHOST_ASSERT(display < 1, "Only single display systems are currently supported.\n");
majorVersion = minorVersion = 0;
if (XF86VidModeQueryVersion(dpy, &majorVersion, &minorVersion)) {
XF86VidModeModeInfo **vidmodes;
int numSettings;
if (XF86VidModeGetAllModeLines(dpy, DefaultScreen(dpy), &numSettings, &vidmodes)) {
GHOST_ASSERT(index < numSettings, "Requested setting outside of valid range.\n");
setting.xPixels = vidmodes[index]->hdisplay;
setting.yPixels = vidmodes[index]->vdisplay;
setting.bpp = DefaultDepth(dpy, DefaultScreen(dpy));
setting.frequency = calculate_rate(vidmodes[index]);
XFree(vidmodes);
return GHOST_kSuccess;
}
}
else {
fprintf(stderr, "Warning: XF86VidMode extension missing!\n");
/* fallback to non xf86vmode below */
}
#endif /* WITH_X11_XF86VMODE */
GHOST_ASSERT(display < 1, "Only single display systems are currently supported.\n");
GHOST_ASSERT(index < 1, "Requested setting outside of valid range.\n");
setting.xPixels = DisplayWidth(dpy, DefaultScreen(dpy));
setting.yPixels = DisplayHeight(dpy, DefaultScreen(dpy));
setting.bpp = DefaultDepth(dpy, DefaultScreen(dpy));
setting.frequency = 60.0f;
return GHOST_kSuccess;
}
GHOST_TSuccess
GHOST_DisplayManagerX11::
getCurrentDisplaySetting(
GHOST_TUns8 display,
GHOST_DisplaySetting& setting) const
{
/* According to the xf86vidmodegetallmodelines man page,
* "The first element of the array corresponds to the current video mode."
*/
return getDisplaySetting(display, 0, setting);
}
GHOST_TSuccess
GHOST_DisplayManagerX11::
setCurrentDisplaySetting(
GHOST_TUns8 display,
const GHOST_DisplaySetting& setting)
{
#ifdef WITH_X11_XF86VMODE
/* Mode switching code ported from SDL:
* See: src/video/x11/SDL_x11modes.c:set_best_resolution
*/
int majorVersion, minorVersion;
XF86VidModeModeInfo **vidmodes;
Display *dpy = m_system->getXDisplay();
int scrnum, num_vidmodes;
if (dpy == NULL)
return GHOST_kFailure;
scrnum = DefaultScreen(dpy);
/* Get video mode list */
majorVersion = minorVersion = 0;
if (!XF86VidModeQueryVersion(dpy, &majorVersion, &minorVersion)) {
fprintf(stderr, "Error: XF86VidMode extension missing!\n");
return GHOST_kFailure;
}
# ifdef DEBUG
printf("Using XFree86-VidModeExtension Version %d.%d\n",
majorVersion, minorVersion);
# endif
if (XF86VidModeGetAllModeLines(dpy, scrnum, &num_vidmodes, &vidmodes)) {
int best_fit = -1;
for (int i = 0; i < num_vidmodes; i++) {
if (vidmodes[i]->hdisplay < setting.xPixels ||
vidmodes[i]->vdisplay < setting.yPixels)
{
continue;
}
if (best_fit == -1 ||
(vidmodes[i]->hdisplay < vidmodes[best_fit]->hdisplay) ||
(vidmodes[i]->hdisplay == vidmodes[best_fit]->hdisplay &&
vidmodes[i]->vdisplay < vidmodes[best_fit]->vdisplay))
{
best_fit = i;
continue;
}
if ((vidmodes[i]->hdisplay == vidmodes[best_fit]->hdisplay) &&
(vidmodes[i]->vdisplay == vidmodes[best_fit]->vdisplay))
{
if (!setting.frequency) {
/* Higher is better, right? */
if (calculate_rate(vidmodes[i]) >
calculate_rate(vidmodes[best_fit]))
{
best_fit = i;
}
}
else {
if (abs(calculate_rate(vidmodes[i]) - (int)setting.frequency) <
abs(calculate_rate(vidmodes[best_fit]) - (int)setting.frequency))
{
best_fit = i;
}
}
}
}
if (best_fit != -1) {
# ifdef DEBUG
printf("Switching to video mode %dx%d %dx%d %d\n",
vidmodes[best_fit]->hdisplay, vidmodes[best_fit]->vdisplay,
vidmodes[best_fit]->htotal, vidmodes[best_fit]->vtotal,
calculate_rate(vidmodes[best_fit]));
# endif
/* change to the mode */
XF86VidModeSwitchToMode(dpy, scrnum, vidmodes[best_fit]);
/* Move the viewport to top left */
XF86VidModeSetViewPort(dpy, scrnum, 0, 0);
}
XFree(vidmodes);
}
else {
return GHOST_kFailure;
}
XFlush(dpy);
return GHOST_kSuccess;
#else
/* Just pretend the request was successful. */
return GHOST_kSuccess;
#endif
}
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