746e7b22e1
Doing so generates the same timings as given in the DMT spec for 120Hz RB, so we should be set there. Other rates might be legal too but why push our luck.
283 lines
7.9 KiB
C
283 lines
7.9 KiB
C
/*
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* Copyright 2005-2006 Luc Verhaegen.
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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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*/
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/* Standalone VESA CVT standard timing modelines generator. */
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#include "xf86.h"
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/* xnfalloc implementation used by the server code we built in */
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pointer
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XNFalloc(unsigned long n)
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{
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pointer r;
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r = malloc(n);
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if (!r) {
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perror("malloc failed");
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exit(1);
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}
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return r;
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}
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/* xnfcalloc implementation used by the server code we built in */
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pointer
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XNFcalloc(unsigned long n)
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{
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pointer r;
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r = calloc(1, n);
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if (!r) {
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perror("calloc failed");
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exit(1);
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}
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return r;
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}
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/*
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* Quickly check wether this is a CVT standard mode.
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*/
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static Bool
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CVTCheckStandard(int HDisplay, int VDisplay, float VRefresh, Bool Reduced,
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Bool Verbose)
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{
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Bool IsCVT = TRUE;
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if ((!(VDisplay % 3) && ((VDisplay * 4 / 3) == HDisplay)) ||
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(!(VDisplay % 9) && ((VDisplay * 16 / 9) == HDisplay)) ||
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(!(VDisplay % 10) && ((VDisplay * 16 / 10) == HDisplay)) ||
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(!(VDisplay % 4) && ((VDisplay * 5 / 4) == HDisplay)) ||
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(!(VDisplay % 9) && ((VDisplay * 15 / 9) == HDisplay)))
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;
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else {
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if (Verbose)
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fprintf(stderr, "Warning: Aspect Ratio is not CVT standard.\n");
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IsCVT = FALSE;
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}
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if ((VRefresh != 50.0) && (VRefresh != 60.0) &&
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(VRefresh != 75.0) && (VRefresh != 85.0)) {
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if (Verbose)
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fprintf(stderr, "Warning: Refresh Rate is not CVT standard "
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"(50, 60, 75 or 85Hz).\n");
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IsCVT = FALSE;
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}
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return IsCVT;
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}
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/*
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* I'm not documenting --interlaced for obvious reasons, even though I did
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* implement it. I also can't deny having looked at gtf here.
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*/
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static void
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PrintUsage(char *Name)
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{
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fprintf(stderr, "\n");
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fprintf(stderr, "usage: %s [-v|--verbose] [-r|--reduced] X Y [refresh]\n",
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Name);
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fprintf(stderr, "\n");
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fprintf(stderr, " -v|--verbose : Warn about CVT standard adherance.\n");
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fprintf(stderr, " -r|--reduced : Create a mode with reduced blanking "
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"(default: normal blanking).\n");
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fprintf(stderr, " X : Desired horizontal resolution "
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"(multiple of 8, required).\n");
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fprintf(stderr, " Y : Desired vertical resolution (required).\n");
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fprintf(stderr, " refresh : Desired refresh rate (default: 60.0Hz).\n");
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fprintf(stderr, "\n");
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fprintf(stderr, "Calculates VESA CVT (Coordinated Video Timing) modelines"
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" for use with X.\n");
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}
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/*
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*
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*/
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static void
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PrintComment(DisplayModeRec *Mode, Bool CVT, Bool Reduced)
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{
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printf("# %dx%d %.2f Hz ", Mode->HDisplay, Mode->VDisplay, Mode->VRefresh);
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if (CVT) {
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printf("(CVT %.2fM",
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((float) Mode->HDisplay * Mode->VDisplay) / 1000000.0);
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if (!(Mode->VDisplay % 3) &&
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((Mode->VDisplay * 4 / 3) == Mode->HDisplay))
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printf("3");
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else if (!(Mode->VDisplay % 9) &&
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((Mode->VDisplay * 16 / 9) == Mode->HDisplay))
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printf("9");
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else if (!(Mode->VDisplay % 10) &&
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((Mode->VDisplay * 16 / 10) == Mode->HDisplay))
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printf("A");
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else if (!(Mode->VDisplay % 4) &&
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((Mode->VDisplay * 5 / 4) == Mode->HDisplay))
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printf("4");
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else if (!(Mode->VDisplay % 9) &&
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((Mode->VDisplay * 15 / 9) == Mode->HDisplay))
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printf("9");
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if (Reduced)
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printf("-R");
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printf(") ");
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} else
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printf("(CVT) ");
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printf("hsync: %.2f kHz; ", Mode->HSync);
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printf("pclk: %.2f MHz", ((float ) Mode->Clock) / 1000.0);
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printf("\n");
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}
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/*
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* Originally grabbed from xf86Mode.c.
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*
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* Ignoring the actual Mode->name, as the user will want something solid
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* to grab hold of.
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*/
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static void
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PrintModeline(DisplayModePtr Mode, int HDisplay, int VDisplay, float VRefresh,
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Bool Reduced)
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{
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if (Reduced)
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printf("Modeline \"%dx%dR\" ", HDisplay, VDisplay);
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else
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printf("Modeline \"%dx%d_%.2f\" ", HDisplay, VDisplay, VRefresh);
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printf("%6.2f %i %i %i %i %i %i %i %i", Mode->Clock/1000., Mode->HDisplay,
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Mode->HSyncStart, Mode->HSyncEnd, Mode->HTotal, Mode->VDisplay,
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Mode->VSyncStart, Mode->VSyncEnd, Mode->VTotal);
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if (Mode->Flags & V_INTERLACE)
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printf(" interlace");
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if (Mode->Flags & V_PHSYNC)
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printf(" +hsync");
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if (Mode->Flags & V_NHSYNC)
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printf(" -hsync");
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if (Mode->Flags & V_PVSYNC)
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printf(" +vsync");
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if (Mode->Flags & V_NVSYNC)
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printf(" -vsync");
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printf("\n");
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}
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/*
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*
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*/
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int
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main (int argc, char *argv[])
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{
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DisplayModeRec *Mode;
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int HDisplay = 0, VDisplay = 0;
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float VRefresh = 0.0;
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Bool Reduced = FALSE, Verbose = FALSE, IsCVT;
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Bool Interlaced = FALSE;
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int n;
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if ((argc < 3) || (argc > 7)) {
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PrintUsage(argv[0]);
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return 1;
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}
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/* This doesn't filter out bad flags properly. Bad flags get passed down
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* to atoi/atof, which then return 0, so that these variables can get
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* filled next time round. So this is just a cosmetic problem.
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*/
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for (n = 1; n < argc; n++) {
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if (!strcmp(argv[n], "-r") || !strcmp(argv[n], "--reduced"))
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Reduced = TRUE;
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else if (!strcmp(argv[n], "-i") || !strcmp(argv[n], "--interlaced"))
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Interlaced = TRUE;
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else if (!strcmp(argv[n], "-v") || !strcmp(argv[n], "--verbose"))
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Verbose = TRUE;
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else if (!strcmp(argv[n], "-h") || !strcmp(argv[n], "--help")) {
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PrintUsage(argv[0]);
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return 0;
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} else if (!HDisplay) {
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HDisplay = atoi(argv[n]);
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if (!HDisplay) {
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PrintUsage(argv[0]);
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return 1;
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}
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}
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else if (!VDisplay) {
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VDisplay = atoi(argv[n]);
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if (!VDisplay) {
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PrintUsage(argv[0]);
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return 1;
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}
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}
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else if (!VRefresh) {
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VRefresh = atof(argv[n]);
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if (!VRefresh) {
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PrintUsage(argv[0]);
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return 1;
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}
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}
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else {
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PrintUsage(argv[0]);
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return 1;
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}
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}
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if (!HDisplay || !VDisplay) {
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PrintUsage(argv[0]);
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return 0;
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}
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/* Default to 60.0Hz */
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if (!VRefresh)
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VRefresh = 60.0;
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/* Horizontal timing is always a multiple of 8: round up. */
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if (HDisplay & 0x07) {
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HDisplay &= ~0x07;
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HDisplay += 8;
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}
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if (Reduced) {
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if ((VRefresh / 60.0) != floor(VRefresh / 60.0)) {
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fprintf(stderr,
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"\nERROR: Multiple of 60Hz refresh rate required for "
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" reduced blanking.\n");
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PrintUsage(argv[0]);
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return 0;
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}
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}
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IsCVT = CVTCheckStandard(HDisplay, VDisplay, VRefresh, Reduced, Verbose);
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Mode = xf86CVTMode(HDisplay, VDisplay, VRefresh, Reduced, Interlaced);
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PrintComment(Mode, IsCVT, Reduced);
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PrintModeline(Mode, HDisplay, VDisplay, VRefresh, Reduced);
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return 0;
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}
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