93 lines
3.4 KiB
C
93 lines
3.4 KiB
C
/*
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* Copyright 2005-2006 Luc Verhaegen.
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* Copyright © 2021 Red Hat, Inc.
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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 "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <xwayland-config.h>
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#include <string.h>
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#include <randrstr.h>
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#include <libxcvt/libxcvt.h>
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#include "xwayland-cvt.h"
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static void
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xwayland_modinfo_from_cvt(xRRModeInfo *modeinfo,
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int hdisplay, int vdisplay, float vrefresh,
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Bool reduced, Bool interlaced)
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{
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struct libxcvt_mode_info *libxcvt_mode_info;
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libxcvt_mode_info =
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libxcvt_gen_mode_info(hdisplay, vdisplay, vrefresh, reduced, interlaced);
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modeinfo->width = libxcvt_mode_info->hdisplay;
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modeinfo->height = libxcvt_mode_info->vdisplay;
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modeinfo->dotClock = libxcvt_mode_info->dot_clock * 1000.0;
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modeinfo->hSyncStart = libxcvt_mode_info->hsync_start;
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modeinfo->hSyncEnd = libxcvt_mode_info->hsync_end;
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modeinfo->hTotal = libxcvt_mode_info->htotal;
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modeinfo->vSyncStart = libxcvt_mode_info->vsync_start;
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modeinfo->vSyncEnd = libxcvt_mode_info->vsync_end;
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modeinfo->vTotal = libxcvt_mode_info->vtotal;
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modeinfo->modeFlags = libxcvt_mode_info->mode_flags;
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free(libxcvt_mode_info);
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}
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static void
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xwayland_modinfo_from_values(xRRModeInfo *modeinfo,
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int hdisplay, int vdisplay, float vrefresh)
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{
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modeinfo->width = hdisplay;
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modeinfo->height = vdisplay;
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modeinfo->hTotal = hdisplay;
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modeinfo->vTotal = vdisplay;
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modeinfo->dotClock = hdisplay * vdisplay * vrefresh;
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}
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RRModePtr
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xwayland_cvt(int hdisplay, int vdisplay, float vrefresh, Bool reduced,
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Bool interlaced)
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{
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char name[128];
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xRRModeInfo modeinfo = { 0, };
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xwayland_modinfo_from_cvt(&modeinfo,
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hdisplay, vdisplay, vrefresh, reduced, interlaced);
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/* Horizontal granularity in libxcvt is 8, so if our horizontal size is not
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* divisible by 8, libxcvt will round it down, and we will advertise a wrong
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* size to our XRandR clients. Fallback to a simpler method in that case.
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*/
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if (modeinfo.width != hdisplay || modeinfo.height != vdisplay) {
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memset(&modeinfo, 0, sizeof(xRRModeInfo));
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xwayland_modinfo_from_values(&modeinfo,
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hdisplay, vdisplay, vrefresh);
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}
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snprintf(name, sizeof name, "%dx%d",
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modeinfo.width, modeinfo.height);
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modeinfo.nameLength = strlen(name);
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return RRModeGet(&modeinfo, name);
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}
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