mirror of
https://github.com/gwm17/glfw.git
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402 lines
11 KiB
C
402 lines
11 KiB
C
//========================================================================
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// GLFW 3.0 X11 - www.glfw.org
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//------------------------------------------------------------------------
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// Copyright (c) 2002-2006 Marcus Geelnard
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// Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.org>
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//
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// This software is provided 'as-is', without any express or implied
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// warranty. In no event will the authors be held liable for any damages
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// arising from the use of this software.
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//
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// Permission is granted to anyone to use this software for any purpose,
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// including commercial applications, and to alter it and redistribute it
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// freely, subject to the following restrictions:
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//
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// 1. The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software. If you use this software
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// in a product, an acknowledgment in the product documentation would
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// be appreciated but is not required.
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//
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// 2. Altered source versions must be plainly marked as such, and must not
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// be misrepresented as being the original software.
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//
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// 3. This notice may not be removed or altered from any source
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// distribution.
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//
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//========================================================================
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#include "internal.h"
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#include <limits.h>
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#include <stdlib.h>
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#include <string.h>
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static int calculateRefreshRate(const XRRModeInfo* mi)
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{
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if (!mi->hTotal || !mi->vTotal)
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return 0;
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return (int) ((double) mi->dotClock / ((double) mi->hTotal * (double) mi->vTotal));
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}
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static const XRRModeInfo* getModeInfo(const XRRScreenResources* sr, RRMode id)
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{
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int i;
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for (i = 0; i < sr->nmode; i++)
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{
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if (sr->modes[i].id == id)
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return sr->modes + i;
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}
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return NULL;
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}
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//////////////////////////////////////////////////////////////////////////
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////// GLFW internal API //////
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//////////////////////////////////////////////////////////////////////////
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// Set the current video mode for the specified monitor
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//
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void _glfwSetVideoMode(_GLFWmonitor* monitor, const GLFWvidmode* desired)
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{
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if (_glfw.x11.randr.available)
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{
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int i, j;
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XRRScreenResources* sr;
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XRRCrtcInfo* ci;
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XRROutputInfo* oi;
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RRMode bestMode = 0;
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unsigned int sizeDiff, leastSizeDiff = UINT_MAX;
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unsigned int rateDiff, leastRateDiff = UINT_MAX;
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sr = XRRGetScreenResources(_glfw.x11.display, _glfw.x11.root);
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ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
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oi = XRRGetOutputInfo(_glfw.x11.display, sr, monitor->x11.output);
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for (i = 0; i < sr->nmode; i++)
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{
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const XRRModeInfo* mi = sr->modes + i;
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if (mi->modeFlags & RR_Interlace)
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continue;
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for (j = 0; j < oi->nmode; j++)
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{
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if (oi->modes[j] == mi->id)
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break;
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}
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if (j == oi->nmode)
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continue;
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sizeDiff = (mi->width - desired->width) *
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(mi->width - desired->width) +
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(mi->height - desired->height) *
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(mi->height - desired->height);
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if (desired->refreshRate)
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rateDiff = abs(calculateRefreshRate(mi) - desired->refreshRate);
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else
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rateDiff = UINT_MAX - calculateRefreshRate(mi);
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if ((sizeDiff < leastSizeDiff) ||
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(sizeDiff == leastSizeDiff && rateDiff < leastRateDiff))
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{
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bestMode = mi->id;
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leastSizeDiff = sizeDiff;
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leastRateDiff = rateDiff;
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}
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}
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if (monitor->x11.oldMode == None)
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monitor->x11.oldMode = ci->mode;
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XRRSetCrtcConfig(_glfw.x11.display,
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sr, monitor->x11.crtc,
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CurrentTime,
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ci->x, ci->y,
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bestMode,
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ci->rotation,
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ci->outputs,
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ci->noutput);
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XRRFreeOutputInfo(oi);
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XRRFreeCrtcInfo(ci);
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XRRFreeScreenResources(sr);
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}
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}
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// Restore the saved (original) video mode for the specified monitor
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//
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void _glfwRestoreVideoMode(_GLFWmonitor* monitor)
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{
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if (_glfw.x11.randr.available)
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{
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XRRScreenResources* sr;
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XRRCrtcInfo* ci;
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if (monitor->x11.oldMode == None)
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return;
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sr = XRRGetScreenResources(_glfw.x11.display, _glfw.x11.root);
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ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
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XRRSetCrtcConfig(_glfw.x11.display,
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sr, monitor->x11.crtc,
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CurrentTime,
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ci->x, ci->y,
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monitor->x11.oldMode,
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ci->rotation,
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ci->outputs,
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ci->noutput);
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XRRFreeCrtcInfo(ci);
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XRRFreeScreenResources(sr);
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monitor->x11.oldMode = None;
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}
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}
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//////////////////////////////////////////////////////////////////////////
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////// GLFW platform API //////
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//////////////////////////////////////////////////////////////////////////
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_GLFWmonitor** _glfwPlatformGetMonitors(int* count)
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{
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_GLFWmonitor** monitors = NULL;
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*count = 0;
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if (_glfw.x11.randr.available)
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{
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int i, found = 0;
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RROutput primary;
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XRRScreenResources* sr;
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sr = XRRGetScreenResources(_glfw.x11.display, _glfw.x11.root);
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primary = XRRGetOutputPrimary(_glfw.x11.display, _glfw.x11.root);
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monitors = calloc(sr->ncrtc, sizeof(_GLFWmonitor*));
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for (i = 0; i < sr->ncrtc; i++)
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{
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int j;
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XRROutputInfo* oi;
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XRRCrtcInfo* ci;
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RROutput output;
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ci = XRRGetCrtcInfo(_glfw.x11.display, sr, sr->crtcs[i]);
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if (ci->noutput == 0)
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{
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XRRFreeCrtcInfo(ci);
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continue;
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}
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output = ci->outputs[0];
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for (j = 0; j < ci->noutput; j++)
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{
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if (ci->outputs[j] == primary)
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{
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output = primary;
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break;
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}
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}
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oi = XRRGetOutputInfo(_glfw.x11.display, sr, output);
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if (oi->connection != RR_Connected)
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{
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XRRFreeOutputInfo(oi);
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XRRFreeCrtcInfo(ci);
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continue;
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}
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monitors[found] = _glfwCreateMonitor(oi->name,
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oi->mm_width, oi->mm_height);
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monitors[found]->x11.output = output;
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monitors[found]->x11.crtc = oi->crtc;
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XRRFreeOutputInfo(oi);
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XRRFreeCrtcInfo(ci);
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found++;
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}
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XRRFreeScreenResources(sr);
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for (i = 0; i < found; i++)
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{
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if (monitors[i]->x11.output == primary)
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{
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_GLFWmonitor* temp = monitors[0];
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monitors[0] = monitors[i];
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monitors[i] = temp;
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break;
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}
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}
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if (found == 0)
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{
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free(monitors);
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monitors = NULL;
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}
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*count = found;
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}
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else
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{
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monitors = calloc(1, sizeof(_GLFWmonitor*));
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monitors[0] = _glfwCreateMonitor("Display",
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DisplayWidthMM(_glfw.x11.display,
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_glfw.x11.screen),
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DisplayHeightMM(_glfw.x11.display,
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_glfw.x11.screen));
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*count = 1;
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}
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return monitors;
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}
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GLboolean _glfwPlatformIsSameMonitor(_GLFWmonitor* first, _GLFWmonitor* second)
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{
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return first->x11.crtc == second->x11.crtc;
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}
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void _glfwPlatformGetMonitorPos(_GLFWmonitor* monitor, int* xpos, int* ypos)
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{
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if (_glfw.x11.randr.available)
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{
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XRRScreenResources* sr;
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XRRCrtcInfo* ci;
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sr = XRRGetScreenResources(_glfw.x11.display, _glfw.x11.root);
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ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
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if (xpos)
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*xpos = ci->x;
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if (ypos)
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*ypos = ci->y;
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XRRFreeCrtcInfo(ci);
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XRRFreeScreenResources(sr);
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}
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else
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{
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if (xpos)
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*xpos = 0;
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if (ypos)
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*ypos = 0;
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}
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}
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GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, int* found)
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{
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GLFWvidmode* result;
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int depth, r, g, b;
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depth = DefaultDepth(_glfw.x11.display, _glfw.x11.screen);
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_glfwSplitBPP(depth, &r, &g, &b);
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*found = 0;
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// Build array of available resolutions
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if (_glfw.x11.randr.available)
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{
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int i, j;
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XRRScreenResources* sr;
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XRROutputInfo* oi;
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sr = XRRGetScreenResources(_glfw.x11.display, _glfw.x11.root);
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oi = XRRGetOutputInfo(_glfw.x11.display, sr, monitor->x11.output);
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result = calloc(oi->nmode, sizeof(GLFWvidmode));
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for (i = 0; i < oi->nmode; i++)
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{
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GLFWvidmode mode;
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const XRRModeInfo* mi = getModeInfo(sr, oi->modes[i]);
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mode.width = mi->width;
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mode.height = mi->height;
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mode.refreshRate = calculateRefreshRate(mi);
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for (j = 0; j < *found; j++)
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{
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if (result[j].width == mode.width &&
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result[j].height == mode.height &&
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result[j].refreshRate == mode.refreshRate)
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{
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break;
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}
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}
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if (j < *found)
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{
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// This is a duplicate, so skip it
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continue;
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}
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mode.redBits = r;
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mode.greenBits = g;
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mode.blueBits = b;
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result[*found] = mode;
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(*found)++;
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}
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XRRFreeOutputInfo(oi);
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XRRFreeScreenResources(sr);
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}
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else
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{
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*found = 1;
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result = calloc(1, sizeof(GLFWvidmode));
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result[0].width = DisplayWidth(_glfw.x11.display, _glfw.x11.screen);
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result[0].height = DisplayHeight(_glfw.x11.display, _glfw.x11.screen);
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result[0].redBits = r;
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result[0].greenBits = g;
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result[0].blueBits = b;
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result[0].refreshRate = 0;
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}
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return result;
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}
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void _glfwPlatformGetVideoMode(_GLFWmonitor* monitor, GLFWvidmode* mode)
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{
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if (_glfw.x11.randr.available)
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{
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XRRScreenResources* sr;
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XRRCrtcInfo* ci;
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sr = XRRGetScreenResources(_glfw.x11.display, _glfw.x11.root);
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ci = XRRGetCrtcInfo(_glfw.x11.display, sr, monitor->x11.crtc);
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mode->width = ci->width;
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mode->height = ci->height;
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mode->refreshRate = calculateRefreshRate(getModeInfo(sr, ci->mode));
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XRRFreeCrtcInfo(ci);
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XRRFreeScreenResources(sr);
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}
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else
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{
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mode->width = DisplayWidth(_glfw.x11.display, _glfw.x11.screen);
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mode->height = DisplayHeight(_glfw.x11.display, _glfw.x11.screen);
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mode->refreshRate = 0;
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}
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_glfwSplitBPP(DefaultDepth(_glfw.x11.display, _glfw.x11.screen),
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&mode->redBits, &mode->greenBits, &mode->blueBits);
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}
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