xorg-server-1.4/hw/xfree86/utils/cvt/cvt.c

   1 /*
   2  * Copyright 2005-2006 Luc Verhaegen.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  */
  23
  24 /* Standalone VESA CVT standard timing modelines generator. */
  25
  26 #include "xf86.h"
  27
  28 /*
  29  * Quickly check wether this is a CVT standard mode.
  30  */
  31 static Bool
  32 CVTCheckStandard(int HDisplay, int VDisplay, float VRefresh, Bool Reduced,
  33                      Bool Verbose)
  34 {
  35     Bool  IsCVT = TRUE;
  36
  37     if ((!(VDisplay % 3) && ((VDisplay * 4 / 3) == HDisplay)) ||
  38         (!(VDisplay % 9) && ((VDisplay * 16 / 9) == HDisplay)) ||
  39         (!(VDisplay % 10) && ((VDisplay * 16 / 10) == HDisplay)) ||
  40         (!(VDisplay % 4) && ((VDisplay * 5 / 4) == HDisplay)) ||
  41         (!(VDisplay % 9) && ((VDisplay * 15 / 9) == HDisplay)))
  42         ;
  43     else {
  44         if (Verbose)
  45             fprintf(stderr, "Warning: Aspect Ratio is not CVT standard.\n");
  46         IsCVT = FALSE;
  47     }
  48
  49     if ((VRefresh != 50.0) && (VRefresh != 60.0) &&
  50         (VRefresh != 75.0) && (VRefresh != 85.0)) {
  51         if (Verbose)
  52             fprintf(stderr, "Warning: Refresh Rate is not CVT standard "
  53                     "(50, 60, 75 or 85Hz).\n");
  54         IsCVT = FALSE;
  55     }
  56
  57     return IsCVT;
  58 }
  59
  60
  61 /*
  62  * I'm not documenting --interlaced for obvious reasons, even though I did
  63  * implement it. I also can't deny having looked at gtf here.
  64  */
  65 static void
  66 PrintUsage(char *Name)
  67 {
  68     fprintf(stderr, "\n");
  69     fprintf(stderr, "usage: %s [-v|--verbose] [-r|--reduced] X Y [refresh]\n",
  70             Name);
  71     fprintf(stderr, "\n");
  72     fprintf(stderr, " -v|--verbose : Warn about CVT standard adherance.\n");
  73     fprintf(stderr, " -r|--reduced : Create a mode with reduced blanking "
  74             "(default: normal blanking).\n");
  75     fprintf(stderr, "            X : Desired horizontal resolution "
  76             "(multiple of 8, required).\n");
  77     fprintf(stderr, "            Y : Desired vertical resolution (required).\n");
  78     fprintf(stderr, "      refresh : Desired refresh rate (default: 60.0Hz).\n");
  79     fprintf(stderr, "\n");
  80
  81     fprintf(stderr, "Calculates VESA CVT (Coordinated Video Timing) modelines"
  82             " for use with X.\n");
  83 }
  84
  85
  86 /*
  87  *
  88  */
  89 static void
  90 PrintComment(DisplayModeRec *Mode, Bool CVT, Bool Reduced)
  91 {
  92     printf("# %dx%d %.2f Hz ", Mode->HDisplay, Mode->VDisplay, Mode->VRefresh);
  93
  94     if (CVT) {
  95         printf("(CVT %.2fM",
  96                ((float) Mode->HDisplay * Mode->VDisplay) / 1000000.0);
  97
  98         if (!(Mode->VDisplay % 3) &&
  99             ((Mode->VDisplay * 4 / 3) == Mode->HDisplay))
 100             printf("3");
 101         else if (!(Mode->VDisplay % 9) &&
 102                  ((Mode->VDisplay * 16 / 9) == Mode->HDisplay))
 103             printf("9");
 104         else if (!(Mode->VDisplay % 10) &&
 105                  ((Mode->VDisplay * 16 / 10) == Mode->HDisplay))
 106             printf("A");
 107         else if (!(Mode->VDisplay % 4) &&
 108                  ((Mode->VDisplay * 5 / 4) == Mode->HDisplay))
 109             printf("4");
 110         else if (!(Mode->VDisplay % 9) &&
 111                  ((Mode->VDisplay * 15 / 9) == Mode->HDisplay))
 112             printf("9");
 113
 114         if (Reduced)
 115             printf("-R");
 116
 117         printf(") ");
 118     } else
 119         printf("(CVT) ");
 120
 121     printf("hsync: %.2f kHz; ", Mode->HSync);
 122     printf("pclk: %.2f MHz", ((float ) Mode->Clock) / 1000.0);
 123
 124     printf("\n");
 125 }
 126
 127
 128 /*
 129  * Originally grabbed from xf86Mode.c.
 130  *
 131  * Ignoring the actual Mode->name, as the user will want something solid
 132  * to grab hold of.
 133  */
 134 static void
 135 PrintModeline(DisplayModePtr Mode, int HDisplay, int VDisplay, float VRefresh,
 136               Bool Reduced)
 137 {
 138     if (Reduced)
 139         printf("Modeline \"%dx%dR\"  ", HDisplay, VDisplay);
 140     else
 141         printf("Modeline \"%dx%d_%.2f\"  ", HDisplay, VDisplay, VRefresh);
 142
 143     printf("%6.2f  %i %i %i %i  %i %i %i %i", Mode->Clock/1000., Mode->HDisplay,
 144            Mode->HSyncStart, Mode->HSyncEnd, Mode->HTotal, Mode->VDisplay,
 145            Mode->VSyncStart, Mode->VSyncEnd, Mode->VTotal);
 146
 147     if (Mode->Flags & V_INTERLACE)
 148         printf(" interlace");
 149     if (Mode->Flags & V_PHSYNC)
 150         printf(" +hsync");
 151     if (Mode->Flags & V_NHSYNC)
 152         printf(" -hsync");
 153     if (Mode->Flags & V_PVSYNC)
 154         printf(" +vsync");
 155     if (Mode->Flags & V_NVSYNC)
 156         printf(" -vsync");
 157
 158     printf("\n");
 159 }
 160
 161
 162 /*
 163  *
 164  */
 165 int
 166 main (int argc, char *argv[])
 167 {
 168     DisplayModeRec  *Mode;
 169     int  HDisplay = 0, VDisplay = 0;
 170     float  VRefresh = 0.0;
 171     Bool  Reduced = FALSE, Verbose = FALSE, IsCVT;
 172     Bool  Interlaced = FALSE;
 173     int  n;
 174
 175     if ((argc < 3) || (argc > 7)) {
 176         PrintUsage(argv[0]);
 177         return 0;
 178     }
 179
 180     /* This doesn't filter out bad flags properly. Bad flags get passed down
 181      * to atoi/atof, which then return 0, so that these variables can get
 182      * filled next time round. So this is just a cosmetic problem.
 183      */
 184     for (n = 1; n < argc; n++) {
 185         if (!strcmp(argv[n], "-r") || !strcmp(argv[n], "--reduced"))
 186             Reduced = TRUE;
 187         else if (!strcmp(argv[n], "-i") || !strcmp(argv[n], "--interlaced"))
 188             Interlaced = TRUE;
 189         else if (!strcmp(argv[n], "-v") || !strcmp(argv[n], "--verbose"))
 190             Verbose = TRUE;
 191         else if (!strcmp(argv[n], "-h") || !strcmp(argv[n], "--help")) {
 192             PrintUsage(argv[0]);
 193             return 0;
 194         } else if (!HDisplay)
 195             HDisplay = atoi(argv[n]);
 196         else if (!VDisplay)
 197             VDisplay = atoi(argv[n]);
 198         else if (!VRefresh)
 199             VRefresh = atof(argv[n]);
 200         else {
 201             PrintUsage(argv[0]);
 202             return 0;
 203         }
 204     }
 205
 206     if (!HDisplay || !VDisplay) {
 207         PrintUsage(argv[0]);
 208         return 0;
 209     }
 210
 211     /* Default to 60.0Hz */
 212     if (!VRefresh)
 213         VRefresh = 60.0;
 214
 215     /* Horizontal timing is always a multiple of 8: round up. */
 216     if (HDisplay & 0x07) {
 217         HDisplay &= ~0x07;
 218         HDisplay += 8;
 219     }
 220
 221     if (Reduced && (VRefresh != 60.0)) {
 222         fprintf(stderr, "\nERROR: 60Hz refresh rate required for reduced"
 223                 " blanking.\n");
 224         PrintUsage(argv[0]);
 225         return 0;
 226     }
 227
 228     IsCVT = CVTCheckStandard(HDisplay, VDisplay, VRefresh, Reduced, Verbose);
 229
 230     Mode = xf86CVTMode(HDisplay, VDisplay, VRefresh, Reduced, Interlaced);
 231
 232     PrintComment(Mode, IsCVT, Reduced);
 233     PrintModeline(Mode, HDisplay, VDisplay, VRefresh, Reduced);
 234
 235     return 0;
 236 }