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glfw/src/x11_monitor.c
Camilla Löwy 56a4cb0a3a Add runtime platform selection 
This adds compile-time support for multiple platforms and runtime
detection of them.  Window system related platform functions are now
called from shared code via the function pointer struct _GLFWplatform.

The timer, thread and module loading platform functions are still called
directly by name and the implementation chosen at link-time.  These
functions are the same for any backend on a given OS, including the Null
backend.

The platforms are now enabled via CMake dependent options following the
GLFW_BUILD_<platform> pattern instead of a mix of automagic and ad-hoc
option names.  There is no longer any option for the Null backend as it
is now always enabled.

Much of the struct stitching work in platform.h was based on an earlier
experimental branch for runtime platform selection by @ronchaine.

Every platform function related to windows, contexts, monitors, input,
event processing and Vulkan have been renamed so that multiple sets of
them can exist without colliding.  Calls to these are now routed through
the _glfw.platform struct member.  These changes makes up most of this
commit.

For Wayland and X11 the client library loading and display creation is
used to detect a running compositor/server.  The XDG_SESSION_TYPE
environment variable is ignored for now, as X11 is still by far the more
complete implementation.

Closes #1655
Closes #1958
2021-10-13 21:47:11 +02:00

617 lines
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//========================================================================
// GLFW 3.4 X11 - www.glfw.org
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Marcus Geelnard
// Copyright (c) 2006-2019 Camilla Löwy <elmindreda@glfw.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.
//
//========================================================================
// It is fine to use C99 in this file because it will not be built with VS
//========================================================================
#include "internal.h"
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
// Check whether the display mode should be included in enumeration
//
static GLFWbool modeIsGood(const XRRModeInfo* mi)
{
return (mi->modeFlags & RR_Interlace) == 0;
}
// Calculates the refresh rate, in Hz, from the specified RandR mode info
//
static int calculateRefreshRate(const XRRModeInfo* mi)
{
if (mi->hTotal && mi->vTotal)
return (int) round((double) mi->dotClock / ((double) mi->hTotal * (double) mi->vTotal));
else
return 0;
}
// Returns the mode info for a RandR mode XID
//
static const XRRModeInfo* getModeInfo(const XRRScreenResources* sr, RRMode id)
{
for (int i = 0; i < sr->nmode; i++)
{
if (sr->modes[i].id == id)
return sr->modes + i;
}
return NULL;
}
// Convert RandR mode info to GLFW video mode
//
static GLFWvidmode vidmodeFromModeInfo(const XRRModeInfo* mi,
const XRRCrtcInfo* ci)
{
GLFWvidmode mode;
if (ci->rotation == RR_Rotate_90 || ci->rotation == RR_Rotate_270)
{
mode.width = mi->height;
mode.height = mi->width;
}
else
{
mode.width = mi->width;
mode.height = mi->height;
}
mode.refreshRate = calculateRefreshRate(mi);
_glfwSplitBPP(DefaultDepth(_glfw.x11.display, _glfw.x11.screen),
&mode.redBits, &mode.greenBits, &mode.blueBits);
return mode;
}
//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
//////////////////////////////////////////////////////////////////////////
// Poll for changes in the set of connected monitors
//
void _glfwPollMonitorsX11(void)
{
if (_glfw.x11.randr.available && !_glfw.x11.randr.monitorBroken)
{
int disconnectedCount, screenCount = 0;
_GLFWmonitor** disconnected = NULL;
XineramaScreenInfo* screens = NULL;
XRRScreenResources* sr = XRRGetScreenResourcesCurrent(_glfw.x11.display,
_glfw.x11.root);
RROutput primary = XRRGetOutputPrimary(_glfw.x11.display,
_glfw.x11.root);
if (_glfw.x11.xinerama.available)
screens = XineramaQueryScreens(_glfw.x11.display, &screenCount);
disconnectedCount = _glfw.monitorCount;
if (disconnectedCount)
{
disconnected = _glfw_calloc(_glfw.monitorCount, sizeof(_GLFWmonitor*));
memcpy(disconnected,
_glfw.monitors,
_glfw.monitorCount * sizeof(_GLFWmonitor*));
}
for (int i = 0; i < sr->noutput; i++)
{
int j, type, widthMM, heightMM;
XRROutputInfo* oi = XRRGetOutputInfo(_glfw.x11.display, sr, sr->outputs[i]);
if (oi->connection != RR_Connected || oi->crtc == None)
{
XRRFreeOutputInfo(oi);
continue;
}
for (j = 0; j < disconnectedCount; j++)
{
if (disconnected[j] &&
disconnected[j]->x11.output == sr->outputs[i])
{
disconnected[j] = NULL;
break;
}
}
if (j < disconnectedCount)
{
XRRFreeOutputInfo(oi);
continue;
}
XRRCrtcInfo* ci = XRRGetCrtcInfo(_glfw.x11.display, sr, oi->crtc);
if (ci->rotation == RR_Rotate_90 || ci->rotation == RR_Rotate_270)
{
widthMM = oi->mm_height;
heightMM = oi->mm_width;
}
else
{
widthMM = oi->mm_width;
heightMM = oi->mm_height;
}
if (widthMM <= 0 || heightMM <= 0)
{
// HACK: If RandR does not provide a physical size, assume the
// X11 default 96 DPI and calculate from the CRTC viewport
// NOTE: These members are affected by rotation, unlike the mode
// info and output info members
widthMM = (int) (ci->width * 25.4f / 96.f);
heightMM = (int) (ci->height * 25.4f / 96.f);
}
_GLFWmonitor* monitor = _glfwAllocMonitor(oi->name, widthMM, heightMM);
monitor->x11.output = sr->outputs[i];
monitor->x11.crtc = oi->crtc;
for (j = 0; j < screenCount; j++)
{
if (screens[j].x_org == ci->x &&
screens[j].y_org == ci->y &&
screens[j].width == ci->width &&
screens[j].height == ci->height)
{
monitor->x11.index = j;
break;
}
}
if (monitor->x11.output == primary)
type = _GLFW_INSERT_FIRST;
else
type = _GLFW_INSERT_LAST;
_glfwInputMonitor(monitor, GLFW_CONNECTED, type);
XRRFreeOutputInfo(oi);
XRRFreeCrtcInfo(ci);
}
XRRFreeScreenResources(sr);
if (screens)
XFree(screens);
for (int i = 0; i < disconnectedCount; i++)
{
if (disconnected[i])
_glfwInputMonitor(disconnected[i], GLFW_DISCONNECTED, 0);
}
_glfw_free(disconnected);
}
else
{
const int widthMM = DisplayWidthMM(_glfw.x11.display, _glfw.x11.screen);
const int heightMM = DisplayHeightMM(_glfw.x11.display, _glfw.x11.screen);
_glfwInputMonitor(_glfwAllocMonitor("Display", widthMM, heightMM),
GLFW_CONNECTED,
_GLFW_INSERT_FIRST);
}
}
// Set the current video mode for the specified monitor
//
void _glfwSetVideoModeX11(_GLFWmonitor* monitor, const GLFWvidmode* desired)
{
if (_glfw.x11.randr.available && !_glfw.x11.randr.monitorBroken)
{
GLFWvidmode current;
RRMode native = None;
const GLFWvidmode* best = _glfwChooseVideoMode(monitor, desired);
_glfwGetVideoModeX11(monitor, &current);
if (_glfwCompareVideoModes(&current, best) == 0)
return;
XRRScreenResources* sr =
XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
XRRCrtcInfo* ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
XRROutputInfo* oi = XRRGetOutputInfo(_glfw.x11.display, sr, monitor->x11.output);
for (int i = 0; i < oi->nmode; i++)
{
const XRRModeInfo* mi = getModeInfo(sr, oi->modes[i]);
if (!modeIsGood(mi))
continue;
const GLFWvidmode mode = vidmodeFromModeInfo(mi, ci);
if (_glfwCompareVideoModes(best, &mode) == 0)
{
native = mi->id;
break;
}
}
if (native)
{
if (monitor->x11.oldMode == None)
monitor->x11.oldMode = ci->mode;
XRRSetCrtcConfig(_glfw.x11.display,
sr, monitor->x11.crtc,
CurrentTime,
ci->x, ci->y,
native,
ci->rotation,
ci->outputs,
ci->noutput);
}
XRRFreeOutputInfo(oi);
XRRFreeCrtcInfo(ci);
XRRFreeScreenResources(sr);
}
}
// Restore the saved (original) video mode for the specified monitor
//
void _glfwRestoreVideoModeX11(_GLFWmonitor* monitor)
{
if (_glfw.x11.randr.available && !_glfw.x11.randr.monitorBroken)
{
if (monitor->x11.oldMode == None)
return;
XRRScreenResources* sr =
XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
XRRCrtcInfo* ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
XRRSetCrtcConfig(_glfw.x11.display,
sr, monitor->x11.crtc,
CurrentTime,
ci->x, ci->y,
monitor->x11.oldMode,
ci->rotation,
ci->outputs,
ci->noutput);
XRRFreeCrtcInfo(ci);
XRRFreeScreenResources(sr);
monitor->x11.oldMode = None;
}
}
//////////////////////////////////////////////////////////////////////////
////// GLFW platform API //////
//////////////////////////////////////////////////////////////////////////
void _glfwFreeMonitorX11(_GLFWmonitor* monitor)
{
}
void _glfwGetMonitorPosX11(_GLFWmonitor* monitor, int* xpos, int* ypos)
{
if (_glfw.x11.randr.available && !_glfw.x11.randr.monitorBroken)
{
XRRScreenResources* sr =
XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
XRRCrtcInfo* ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
if (ci)
{
if (xpos)
*xpos = ci->x;
if (ypos)
*ypos = ci->y;
XRRFreeCrtcInfo(ci);
}
XRRFreeScreenResources(sr);
}
}
void _glfwGetMonitorContentScaleX11(_GLFWmonitor* monitor,
float* xscale, float* yscale)
{
if (xscale)
*xscale = _glfw.x11.contentScaleX;
if (yscale)
*yscale = _glfw.x11.contentScaleY;
}
void _glfwGetMonitorWorkareaX11(_GLFWmonitor* monitor,
int* xpos, int* ypos,
int* width, int* height)
{
int areaX = 0, areaY = 0, areaWidth = 0, areaHeight = 0;
if (_glfw.x11.randr.available && !_glfw.x11.randr.monitorBroken)
{
XRRScreenResources* sr =
XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
XRRCrtcInfo* ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
areaX = ci->x;
areaY = ci->y;
const XRRModeInfo* mi = getModeInfo(sr, ci->mode);
if (ci->rotation == RR_Rotate_90 || ci->rotation == RR_Rotate_270)
{
areaWidth = mi->height;
areaHeight = mi->width;
}
else
{
areaWidth = mi->width;
areaHeight = mi->height;
}
XRRFreeCrtcInfo(ci);
XRRFreeScreenResources(sr);
}
else
{
areaWidth = DisplayWidth(_glfw.x11.display, _glfw.x11.screen);
areaHeight = DisplayHeight(_glfw.x11.display, _glfw.x11.screen);
}
if (_glfw.x11.NET_WORKAREA && _glfw.x11.NET_CURRENT_DESKTOP)
{
Atom* extents = NULL;
Atom* desktop = NULL;
const unsigned long extentCount =
_glfwGetWindowPropertyX11(_glfw.x11.root,
_glfw.x11.NET_WORKAREA,
XA_CARDINAL,
(unsigned char**) &extents);
if (_glfwGetWindowPropertyX11(_glfw.x11.root,
_glfw.x11.NET_CURRENT_DESKTOP,
XA_CARDINAL,
(unsigned char**) &desktop) > 0)
{
if (extentCount >= 4 && *desktop < extentCount / 4)
{
const int globalX = extents[*desktop * 4 + 0];
const int globalY = extents[*desktop * 4 + 1];
const int globalWidth = extents[*desktop * 4 + 2];
const int globalHeight = extents[*desktop * 4 + 3];
if (areaX < globalX)
{
areaWidth -= globalX - areaX;
areaX = globalX;
}
if (areaY < globalY)
{
areaHeight -= globalY - areaY;
areaY = globalY;
}
if (areaX + areaWidth > globalX + globalWidth)
areaWidth = globalX - areaX + globalWidth;
if (areaY + areaHeight > globalY + globalHeight)
areaHeight = globalY - areaY + globalHeight;
}
}
if (extents)
XFree(extents);
if (desktop)
XFree(desktop);
}
if (xpos)
*xpos = areaX;
if (ypos)
*ypos = areaY;
if (width)
*width = areaWidth;
if (height)
*height = areaHeight;
}
GLFWvidmode* _glfwGetVideoModesX11(_GLFWmonitor* monitor, int* count)
{
GLFWvidmode* result;
*count = 0;
if (_glfw.x11.randr.available && !_glfw.x11.randr.monitorBroken)
{
XRRScreenResources* sr =
XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
XRRCrtcInfo* ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
XRROutputInfo* oi = XRRGetOutputInfo(_glfw.x11.display, sr, monitor->x11.output);
result = _glfw_calloc(oi->nmode, sizeof(GLFWvidmode));
for (int i = 0; i < oi->nmode; i++)
{
const XRRModeInfo* mi = getModeInfo(sr, oi->modes[i]);
if (!modeIsGood(mi))
continue;
const GLFWvidmode mode = vidmodeFromModeInfo(mi, ci);
int j;
for (j = 0; j < *count; j++)
{
if (_glfwCompareVideoModes(result + j, &mode) == 0)
break;
}
// Skip duplicate modes
if (j < *count)
continue;
(*count)++;
result[*count - 1] = mode;
}
XRRFreeOutputInfo(oi);
XRRFreeCrtcInfo(ci);
XRRFreeScreenResources(sr);
}
else
{
*count = 1;
result = _glfw_calloc(1, sizeof(GLFWvidmode));
_glfwGetVideoModeX11(monitor, result);
}
return result;
}
void _glfwGetVideoModeX11(_GLFWmonitor* monitor, GLFWvidmode* mode)
{
if (_glfw.x11.randr.available && !_glfw.x11.randr.monitorBroken)
{
XRRScreenResources* sr =
XRRGetScreenResourcesCurrent(_glfw.x11.display, _glfw.x11.root);
XRRCrtcInfo* ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
if (ci)
{
const XRRModeInfo* mi = getModeInfo(sr, ci->mode);
if (mi) // mi can be NULL if the monitor has been disconnected
*mode = vidmodeFromModeInfo(mi, ci);
XRRFreeCrtcInfo(ci);
}
XRRFreeScreenResources(sr);
}
else
{
mode->width = DisplayWidth(_glfw.x11.display, _glfw.x11.screen);
mode->height = DisplayHeight(_glfw.x11.display, _glfw.x11.screen);
mode->refreshRate = 0;
_glfwSplitBPP(DefaultDepth(_glfw.x11.display, _glfw.x11.screen),
&mode->redBits, &mode->greenBits, &mode->blueBits);
}
}
GLFWbool _glfwGetGammaRampX11(_GLFWmonitor* monitor, GLFWgammaramp* ramp)
{
if (_glfw.x11.randr.available && !_glfw.x11.randr.gammaBroken)
{
const size_t size = XRRGetCrtcGammaSize(_glfw.x11.display,
monitor->x11.crtc);
XRRCrtcGamma* gamma = XRRGetCrtcGamma(_glfw.x11.display,
monitor->x11.crtc);
_glfwAllocGammaArrays(ramp, size);
memcpy(ramp->red, gamma->red, size * sizeof(unsigned short));
memcpy(ramp->green, gamma->green, size * sizeof(unsigned short));
memcpy(ramp->blue, gamma->blue, size * sizeof(unsigned short));
XRRFreeGamma(gamma);
return GLFW_TRUE;
}
else if (_glfw.x11.vidmode.available)
{
int size;
XF86VidModeGetGammaRampSize(_glfw.x11.display, _glfw.x11.screen, &size);
_glfwAllocGammaArrays(ramp, size);
XF86VidModeGetGammaRamp(_glfw.x11.display,
_glfw.x11.screen,
ramp->size, ramp->red, ramp->green, ramp->blue);
return GLFW_TRUE;
}
else
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"X11: Gamma ramp access not supported by server");
return GLFW_FALSE;
}
}
void _glfwSetGammaRampX11(_GLFWmonitor* monitor, const GLFWgammaramp* ramp)
{
if (_glfw.x11.randr.available && !_glfw.x11.randr.gammaBroken)
{
if (XRRGetCrtcGammaSize(_glfw.x11.display, monitor->x11.crtc) != ramp->size)
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"X11: Gamma ramp size must match current ramp size");
return;
}
XRRCrtcGamma* gamma = XRRAllocGamma(ramp->size);
memcpy(gamma->red, ramp->red, ramp->size * sizeof(unsigned short));
memcpy(gamma->green, ramp->green, ramp->size * sizeof(unsigned short));
memcpy(gamma->blue, ramp->blue, ramp->size * sizeof(unsigned short));
XRRSetCrtcGamma(_glfw.x11.display, monitor->x11.crtc, gamma);
XRRFreeGamma(gamma);
}
else if (_glfw.x11.vidmode.available)
{
XF86VidModeSetGammaRamp(_glfw.x11.display,
_glfw.x11.screen,
ramp->size,
(unsigned short*) ramp->red,
(unsigned short*) ramp->green,
(unsigned short*) ramp->blue);
}
else
{
_glfwInputError(GLFW_PLATFORM_ERROR,
"X11: Gamma ramp access not supported by server");
}
}
//////////////////////////////////////////////////////////////////////////
////// GLFW native API //////
//////////////////////////////////////////////////////////////////////////
GLFWAPI RRCrtc glfwGetX11Adapter(GLFWmonitor* handle)
{
_GLFWmonitor* monitor = (_GLFWmonitor*) handle;
_GLFW_REQUIRE_INIT_OR_RETURN(None);
return monitor->x11.crtc;
}
GLFWAPI RROutput glfwGetX11Monitor(GLFWmonitor* handle)
{
_GLFWmonitor* monitor = (_GLFWmonitor*) handle;
_GLFW_REQUIRE_INIT_OR_RETURN(None);
return monitor->x11.output;
}
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