Attachment 3897 Details for Bug 5153 – Code, manpage and Makefile.am for cvt

[patch] Code, manpage and Makefile.am for cvt

cvt.diff (text/plain), 20.99 KB, created by Luc Verhaegen on 2005-11-25 06:16:51 UTC

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Creator: Luc Verhaegen

Created: 2005-11-25 06:16:51 UTC

Size: 20.99 KB

patch

obsolete

>diff -u -r -N /tmp/cvt/cvt.c cvt/cvt.c
>--- /tmp/cvt/cvt.c	1970-01-01 01:00:00.000000000 +0100
>+++ cvt/cvt.c	2005-11-24 19:30:57.012593032 +0100
>@@ -0,0 +1,534 @@
>+/*
>+ * Copyright (c) 2005 by Luc Verhaegen.
>+ * Copyright (c) 1997-2003 by The XFree86 Project, Inc.
>+ *
>+ * Permission is hereby granted, free of charge, to any person obtaining a
>+ * copy of this software and associated documentation files (the "Software"),
>+ * to deal in the Software without restriction, including without limitation
>+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
>+ * and/or sell copies of the Software, and to permit persons to whom the
>+ * Software is furnished to do so, subject to the following conditions:
>+ *
>+ * The above copyright notice and this permission notice shall be included in
>+ * all copies or substantial portions of the Software.
>+ *
>+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
>+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
>+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
>+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
>+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
>+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
>+ * OTHER DEALINGS IN THE SOFTWARE.
>+ *
>+ * Except as contained in this notice, the name of the copyright holder(s)
>+ * and author(s) shall not be used in advertising or otherwise to promote
>+ * the sale, use or other dealings in this Software without prior written
>+ * authorization from the copyright holder(s) and author(s).
>+ */
>+
>+/*
>+ * Calculate VESA CVT standard timing modelines.
>+ *
>+ * My own copyright is added. This is only there for the standalone version.
>+ * I don't want to polute the xf86Mode.c license.
>+ * 
>+ */
>+#include "xorg/xf86.h"
>+
>+/*
>+ * Add this to modeflags.
>+ */
>+#define V_REDBLANK 0x8000
>+
>+/*
>+ * Grabbed from xf86Mode.c from the Xorg tree. Hence the copyright and license.
>+ *
>+ * Altered for stdout printing and reduced blanking ModeFlag.
>+ */
>+static void
>+add(char **p, char *new)
>+{
>+    *p = xnfrealloc(*p, strlen(*p) + strlen(new) + 2);
>+    strcat(*p, " ");
>+    strcat(*p, new);
>+}
>+
>+static void
>+PrintModeline(DisplayModePtr mode)
>+{
>+    char tmp[256];
>+    char *flags = xnfcalloc(1, 1);
>+
>+    if (mode->HSkew) { 
>+	snprintf(tmp, 256, "hskew %i", mode->HSkew); 
>+	add(&flags, tmp);
>+    }
>+    if (mode->VScan) { 
>+	snprintf(tmp, 256, "vscan %i", mode->VScan); 
>+	add(&flags, tmp);
>+    }
>+    if (mode->Flags & V_INTERLACE) add(&flags, "interlace");
>+    if (mode->Flags & V_CSYNC) add(&flags, "composite");
>+    if (mode->Flags & V_DBLSCAN) add(&flags, "doublescan");
>+    if (mode->Flags & V_BCAST) add(&flags, "bcast");
>+    if (mode->Flags & V_PHSYNC) add(&flags, "+hsync");
>+    if (mode->Flags & V_NHSYNC) add(&flags, "-hsync");
>+    if (mode->Flags & V_PVSYNC) add(&flags, "+vsync");
>+    if (mode->Flags & V_NVSYNC) add(&flags, "-vsync");
>+    if (mode->Flags & V_PCSYNC) add(&flags, "+csync");
>+    if (mode->Flags & V_NCSYNC) add(&flags, "-csync");
>+#if 0
>+    if (mode->Flags & V_CLKDIV2) add(&flags, "vclk/2");
>+#endif
>+    if (mode->Flags & V_REDBLANK) add(&flags, "reduced");
>+
>+    printf("Modeline \"%s\"  %6.2f  %i %i %i %i  %i %i %i %i%s\n",
>+           mode->name, mode->Clock/1000., mode->HDisplay,
>+           mode->HSyncStart, mode->HSyncEnd, mode->HTotal,
>+           mode->VDisplay, mode->VSyncStart, mode->VSyncEnd,
>+           mode->VTotal, flags);
>+    xfree(flags);
>+}
>+
>+
>+/*
>+ * New code... Well, somewhat.
>+ */
>+
>+
>+/*
>+ * These calculations are stolen from the CVT calculation spreadsheet written
>+ * by Graham Loveridge. He seems to be claiming no copyright and there seems to
>+ * be no license attached to this. He apparently just wants to see his name
>+ * mentioned.
>+ *
>+ * This file can be found at http://www.vesa.org/Public/CVT/CVTd6r1.xls
>+ *
>+ * Comments and structure corresponds to the comments and structure of the xls.
>+ * This should ease importing of future changes to the standard (not very
>+ * likely though).
>+ *
>+ * About margins; i'm sure that they are to be the bit between HDisplay and
>+ * HBlankStart, HBlankEnd and HTotal, VDisplay and VBlankStart, VBlankEnd and 
>+ * VTotal, where the overscan colour is shown. FB seems to call _all_ blanking
>+ * outside sync "margin" for some reason. Since we prefer seeing proper
>+ * blanking instead of the overscan colour, and since the Crtc* values will
>+ * probably get altered after us, we will disable margins altogether. With
>+ * these calculations, Margins will plainly expand H/VDisplay, and we don't
>+ * want that.
>+ *
>+ */
>+static DisplayModeRec *
>+xf86CVTMode(int HDisplay, int VDisplay, float VRefresh, Bool Reduced,
>+            Bool Interlaced)
>+{
>+    DisplayModeRec  *Mode = xnfalloc(sizeof(DisplayModeRec));
>+
>+    /* 1) top/bottom margin size (% of height) - default: 1.8 */
>+#define CVT_MARGIN_PERCENTAGE 1.8    
>+
>+    /* 2) character cell horizontal granularity (pixels) - default 8 */
>+#define CVT_H_GRANULARITY 8
>+
>+    /* 4) Minimum vertical porch (lines) - default 3 */
>+#define CVT_MIN_V_PORCH 3
>+
>+    /* 4) Minimum number of vertical back porch lines - default 6 */
>+#define CVT_MIN_V_BPORCH 6
>+
>+    /* Pixel Clock step (kHz) */
>+#define CVT_CLOCK_STEP 250
>+
>+    Bool Margins = FALSE;
>+    float  VFieldRate, HPeriod;
>+    int  HDisplayRnd, HMargin;
>+    int  VDisplayRnd, VMargin, VSync;
>+    float  Interlace; /* Please rename this */
>+
>+    /* CVT default is 60.0Hz */
>+    if (!VRefresh)
>+        VRefresh = 60.0;
>+
>+    /* 1. Required field rate */
>+    if (Interlaced)
>+        VFieldRate = VRefresh * 2;
>+    else
>+        VFieldRate = VRefresh;
>+
>+    /* 2. Horizontal pixels */
>+    HDisplayRnd = HDisplay - (HDisplay % CVT_H_GRANULARITY);
>+
>+    /* 3. Determine left and right borders */
>+    if (Margins) {
>+        /* right margin is actually exactly the same as left */
>+        HMargin = (((float) HDisplayRnd) * CVT_MARGIN_PERCENTAGE / 100.0);
>+        HMargin -= HMargin % CVT_H_GRANULARITY;
>+    } else
>+        HMargin = 0;
>+
>+    /* 4. Find total active pixels */
>+    Mode->HDisplay = HDisplayRnd + 2*HMargin;
>+
>+    /* 5. Find number of lines per field */
>+    if (Interlaced)
>+        VDisplayRnd = VDisplay / 2;
>+    else
>+        VDisplayRnd = VDisplay;
>+
>+    /* 6. Find top and bottom margins */
>+    /* nope. */
>+    if (Margins)
>+        /* top and bottom margins are equal again. */
>+        VMargin = (((float) VDisplayRnd) * CVT_MARGIN_PERCENTAGE / 100.0);
>+    else
>+        VMargin = 0;
>+
>+    Mode->VDisplay = VDisplay + 2*VMargin;
>+
>+    /* 7. Interlace */
>+    if (Interlaced)
>+        Interlace = 0.5;
>+    else
>+        Interlace = 0.0;
>+
>+    /* Determine VSync Width from aspect ratio */
>+    if (!(VDisplay % 3) && ((VDisplay * 4 / 3) == HDisplay))
>+        VSync = 4;
>+    else if (!(VDisplay % 9) && ((VDisplay * 16 / 9) == HDisplay))
>+        VSync = 5;
>+    else if (!(VDisplay % 10) && ((VDisplay * 16 / 10) == HDisplay))
>+        VSync = 6;
>+    else if (!(VDisplay % 4) && ((VDisplay * 5 / 4) == HDisplay))
>+        VSync = 7;
>+    else if (!(VDisplay % 9) && ((VDisplay * 15 / 9) == HDisplay))
>+        VSync = 7;
>+    else /* Custom */
>+        VSync = 10;
>+
>+    if (!Reduced) { /* simplified GTF calculation */
>+
>+        /* 4) Minimum time of vertical sync + back porch interval (µs) 
>+         * default 550.0 */
>+#define CVT_MIN_VSYNC_BP 550.0
>+
>+        /* 3) Nominal HSync width (% of line period) - default 8 */
>+#define CVT_HSYNC_PERCENTAGE 8
>+
>+        float  HBlankPercentage;
>+        int  VSyncAndBackPorch, VBackPorch;
>+        int  HBlank;
>+
>+        /* 8. Estimated Horizontal period */
>+        HPeriod = ((float) (1000000.0 / VFieldRate - CVT_MIN_VSYNC_BP)) / 
>+            (VDisplayRnd + 2 * VMargin + CVT_MIN_V_PORCH + Interlace);
>+
>+        /* 9. Find number of lines in sync + backporch */
>+        if (((int)(CVT_MIN_VSYNC_BP / HPeriod) + 1) < (VSync + CVT_MIN_V_PORCH))
>+            VSyncAndBackPorch = VSync + CVT_MIN_V_PORCH;
>+        else
>+            VSyncAndBackPorch = (int)(CVT_MIN_VSYNC_BP / HPeriod) + 1;
>+
>+        /* 10. Find number of lines in back porch */
>+        VBackPorch = VSyncAndBackPorch - VSync;
>+
>+        /* 11. Find total number of lines in vertical field */
>+        Mode->VTotal = VDisplayRnd + 2 * VMargin + VSyncAndBackPorch + Interlace
>+            + CVT_MIN_V_PORCH;
>+
>+        /* 5) Definition of Horizontal blanking time limitation */
>+        /* Gradient (%/kHz) - default 600 */
>+#define CVT_M_FACTOR 600
>+
>+        /* Offset (%) - default 40 */
>+#define CVT_C_FACTOR 40
>+
>+        /* Blanking time scaling factor - default 128 */
>+#define CVT_K_FACTOR 128
>+
>+        /* Scaling factor weighting - default 20 */
>+#define CVT_J_FACTOR 20
>+
>+#define CVT_M_PRIME CVT_M_FACTOR * CVT_K_FACTOR / 256
>+#define CVT_C_PRIME (CVT_C_FACTOR - CVT_J_FACTOR) * CVT_K_FACTOR / 256 + \
>+        CVT_J_FACTOR
>+
>+        /* 12. Find ideal blanking duty cycle from formula */
>+        HBlankPercentage = CVT_C_PRIME - CVT_M_PRIME * HPeriod/1000.0;
>+
>+        /* 13. Blanking time */
>+        if (HBlankPercentage < 20)
>+            HBlankPercentage = 20;
>+
>+        HBlank = Mode->HDisplay * HBlankPercentage/(100.0 - HBlankPercentage);
>+        HBlank -= HBlank % (2*CVT_H_GRANULARITY);
>+        
>+        /* 14. Find total number of pixels in a line. */
>+        Mode->HTotal = Mode->HDisplay + HBlank;
>+
>+        /* Fill in HSync values */
>+        Mode->HSyncEnd = Mode->HDisplay + HBlank / 2;
>+
>+        Mode->HSyncStart = Mode->HSyncEnd - 
>+            (Mode->HTotal * CVT_HSYNC_PERCENTAGE) / 100;
>+        Mode->HSyncStart += CVT_H_GRANULARITY - 
>+            Mode->HSyncStart % CVT_H_GRANULARITY;
>+
>+        /* Fill in VSync values */
>+        Mode->VSyncStart = Mode->VDisplay + CVT_MIN_V_PORCH;
>+        Mode->VSyncEnd = Mode->VSyncStart + VSync;
>+
>+    } else { /* Reduced blanking */
>+        /* Minimum vertical blanking interval time (µs) - default 460 */
>+#define CVT_RB_MIN_VBLANK 460.0
>+
>+        /* Fixed number of clocks for horizontal sync */
>+#define CVT_RB_H_SYNC 32.0
>+
>+        /* Fixed number of clocks for horizontal blanking */
>+#define CVT_RB_H_BLANK 160.0
>+
>+        /* Fixed number of lines for vertical front porch - default 3 */
>+#define CVT_RB_VFPORCH 3
>+
>+        int  VBILines;
>+
>+        /* 8. Estimate Horizontal period. */
>+        HPeriod = ((float) (1000000.0 / VFieldRate - CVT_RB_MIN_VBLANK)) / 
>+            (VDisplayRnd + 2*VMargin);
>+
>+        /* 9. Find number of lines in vertical blanking */
>+        VBILines = ((float) CVT_RB_MIN_VBLANK) / HPeriod + 1;
>+
>+        /* 10. Check if vertical blanking is sufficient */
>+        if (VBILines < (CVT_RB_VFPORCH + VSync + CVT_MIN_V_BPORCH))
>+            VBILines = CVT_RB_VFPORCH + VSync + CVT_MIN_V_BPORCH;
>+        
>+        /* 11. Find total number of lines in vertical field */
>+        Mode->VTotal = VDisplayRnd + 2 * VMargin + Interlace + VBILines;
>+
>+        /* 12. Find total number of pixels in a line */
>+        Mode->HTotal = Mode->HDisplay + CVT_RB_H_BLANK;
>+
>+        /* Fill in HSync values */
>+        Mode->HSyncEnd = Mode->HDisplay + CVT_RB_H_BLANK / 2;
>+        Mode->HSyncStart = Mode->HSyncEnd - CVT_RB_H_SYNC;
>+
>+        /* Fill in VSync values */
>+        Mode->VSyncStart = Mode->VDisplay + CVT_RB_VFPORCH;
>+        Mode->VSyncEnd = Mode->VSyncStart + VSync;
>+    }
>+
>+    /* 15/13. Find pixel clock frequency (kHz for xf86) */
>+    Mode->Clock = Mode->HTotal * 1000.0 / HPeriod;
>+    Mode->Clock -= Mode->Clock % CVT_CLOCK_STEP;
>+
>+    /* 16/14. Find actual Horizontal Frequency (kHz) */
>+    Mode->HSync = ((float) Mode->Clock) / ((float) Mode->HTotal);
>+
>+    /* 17/15. Find actual Field rate */
>+    Mode->VRefresh = (1000.0 * ((float) Mode->Clock)) / 
>+        ((float) (Mode->HTotal * Mode->VTotal));
>+
>+    /* 18/16. Find actual vertical frame frequency */
>+    /* ignore - just set the mode flag for interlaced */
>+    if (Interlaced)
>+        Mode->VTotal *= 2;
>+
>+    /* Fill in Mode parameters */
>+    {
>+        char  Name[256];
>+        Name[0] = 0;
>+        snprintf(Name, 256, "%dx%d_%.2f", HDisplay, VDisplay, VRefresh);
>+        Mode->name = xnfalloc(strlen(Name) + 1);
>+        memcpy(Mode->name, Name, strlen(Name));
>+    }
>+
>+    if (Reduced)
>+        Mode->Flags |= V_PHSYNC | V_NVSYNC | V_REDBLANK;
>+    else
>+        Mode->Flags |= V_NHSYNC | V_PVSYNC;
>+
>+    if (Interlaced)
>+        Mode->Flags |= V_INTERLACE;
>+
>+    return Mode;
>+}
>+
>+
>+/*
>+ * Quickly check wether this is a CVT standard mode.
>+ */
>+static Bool
>+xf86CVTCheckStandard(int HDisplay, int VDisplay, float VRefresh, Bool Reduced,
>+                     Bool Verbose)
>+{
>+    Bool  IsCVT = TRUE;
>+
>+    if ((!(VDisplay % 3) && ((VDisplay * 4 / 3) == HDisplay)) ||
>+        (!(VDisplay % 9) && ((VDisplay * 16 / 9) == HDisplay)) ||
>+        (!(VDisplay % 10) && ((VDisplay * 16 / 10) == HDisplay)) ||
>+        (!(VDisplay % 4) && ((VDisplay * 5 / 4) == HDisplay)) ||
>+        (!(VDisplay % 9) && ((VDisplay * 15 / 9) == HDisplay)))
>+        ;
>+    else {
>+        if (Verbose)
>+            fprintf(stderr, "Warning: Aspect Ratio is not CVT standard.\n");
>+        IsCVT = FALSE;
>+    }
>+    
>+    if ((VRefresh != 50.0) && (VRefresh != 60.0) &&
>+        (VRefresh != 75.0) && (VRefresh != 85.0)) {
>+        if (Verbose)
>+            fprintf(stderr, "Warning: Refresh Rate is not CVT standard "
>+                    "(50, 60, 75 or 85Hz).\n");
>+        IsCVT = FALSE;
>+    }
>+    
>+    if (Reduced && (VRefresh != 60.0)) {
>+        if (Verbose)
>+            fprintf(stderr, "Warning: 60Hz refresh rate preferred for reduced "
>+                    "blanking.\n");
>+        IsCVT = FALSE;
>+    }
>+
>+    return IsCVT;
>+}
>+
>+
>+/*
>+ * I'm not documenting --interlaced for obvious reasons, even though I did
>+ * implement it. I also can't deny having looked at gtf here.
>+ */
>+static void
>+PrintUsage(char *Name)
>+{
>+    fprintf(stderr, "\n");
>+    fprintf(stderr, "usage: %s [-v|--verbose] [-r|--reduced] X Y [refresh]\n",
>+            Name);
>+    fprintf(stderr, "\n");
>+    fprintf(stderr, " -v|--verbose : Warn about CVT standard adherance.\n");
>+    fprintf(stderr, " -r|--reduced : Create a mode with reduced blanking "
>+            "(default: normal blanking).\n");
>+    fprintf(stderr, "            X : Desired horizontal resolution "
>+            "(multiple of 8, required).\n");
>+    fprintf(stderr, "            Y : Desired vertical resolution (required).\n");
>+    fprintf(stderr, "      refresh : Desired refresh rate (default: 60.0Hz).\n");
>+    fprintf(stderr, "\n");
>+
>+    fprintf(stderr, "Calculates VESA CVT (Common Video Timing) modelines for"
>+            " use with X.\n");
>+}
>+
>+
>+/*
>+ *
>+ */
>+static void
>+PrintComment(DisplayModeRec *Mode, Bool CVT)
>+{
>+    printf("# %dx%d %.2f Hz ", Mode->HDisplay, Mode->VDisplay, Mode->VRefresh);
>+
>+    if (CVT) {
>+        printf("(CVT %.2fM",
>+               ((float) Mode->HDisplay * Mode->VDisplay) / 1000000.0);
>+
>+        if (!(Mode->VDisplay % 3) &&
>+            ((Mode->VDisplay * 4 / 3) == Mode->HDisplay))
>+            printf("3");
>+        else if (!(Mode->VDisplay % 9) &&
>+                 ((Mode->VDisplay * 16 / 9) == Mode->HDisplay))
>+            printf("9");
>+        else if (!(Mode->VDisplay % 10) &&
>+                 ((Mode->VDisplay * 16 / 10) == Mode->HDisplay))
>+            printf("A");
>+        else if (!(Mode->VDisplay % 4) &&
>+                 ((Mode->VDisplay * 5 / 4) == Mode->HDisplay))
>+            printf("4");
>+        else if (!(Mode->VDisplay % 9) &&
>+                 ((Mode->VDisplay * 15 / 9) == Mode->HDisplay))
>+            printf("9");
>+
>+        if (Mode->Flags & V_REDBLANK)
>+            printf("-R");
>+
>+        printf(") ");
>+    } else
>+        printf("(CVT) ");
>+
>+    printf("hsync: %.2f kHz; ", Mode->HSync);
>+    printf("pclk: %.2f MHz", ((float ) Mode->Clock) / 1000.0);
>+
>+    printf("\n");
>+}
>+
>+
>+/*
>+ *
>+ */
>+int
>+main (int argc, char *argv[])
>+{
>+    DisplayModeRec  *Mode;
>+    int  HDisplay = 0, VDisplay = 0;
>+    float  VRefresh = 0.0;
>+    Bool  Reduced = FALSE, Verbose = FALSE, IsCVT;
>+    Bool  Interlaced = FALSE;
>+    int  n;
>+
>+    if ((argc < 3) || (argc > 7)) {
>+        PrintUsage(argv[0]);
>+        return 0;
>+    }
>+
>+    /* This doesn't filter out bad flags properly. Bad flags get passed down
>+     * to atoi/atof, which then return 0, so that these variables can get
>+     * filled next time round. So this is just a cosmetic problem.
>+     */
>+    for (n = 1; n < argc; n++) {
>+        if (!strcmp(argv[n], "-r") || !strcmp(argv[n], "--reduced"))
>+            Reduced = TRUE;
>+        else if (!strcmp(argv[n], "-i") || !strcmp(argv[n], "--interlaced"))
>+            Interlaced = TRUE;
>+        else if (!strcmp(argv[n], "-v") || !strcmp(argv[n], "--verbose"))
>+            Verbose = TRUE;
>+        else if (!strcmp(argv[n], "-h") || !strcmp(argv[n], "--help")) {
>+            PrintUsage(argv[0]);
>+            return 0;
>+        } else if (!HDisplay)
>+            HDisplay = atoi(argv[n]);
>+        else if (!VDisplay)
>+            VDisplay = atoi(argv[n]);
>+        else if (!VRefresh)
>+            VRefresh = atof(argv[n]);
>+        else {
>+            PrintUsage(argv[0]);
>+            return 0;
>+        }
>+    }
>+
>+    if (!HDisplay || !VDisplay) {
>+        PrintUsage(argv[0]);
>+        return 0;
>+    }
>+
>+    /* Default to 60.0Hz */
>+    if (!VRefresh)
>+        VRefresh = 60.0;
>+
>+    /* Enforce hard limitation */
>+    if (HDisplay % 8) {
>+        fprintf(stderr, "\nERROR: Horizontal Resolution needs to be a "
>+                "multiple of 8.\n");
>+        PrintUsage(argv[0]);
>+        return 0;
>+    }
>+
>+    IsCVT = xf86CVTCheckStandard(HDisplay, VDisplay, VRefresh, Reduced, Verbose);
>+
>+    Mode = xf86CVTMode(HDisplay, VDisplay, VRefresh, Reduced, Interlaced);
>+
>+    PrintComment(Mode, IsCVT);
>+    PrintModeline(Mode);
>+    
>+    return 0;
>+}
>diff -u -r -N /tmp/cvt/cvt.man.pre cvt/cvt.man.pre
>--- /tmp/cvt/cvt.man.pre	1970-01-01 01:00:00.000000000 +0100
>+++ cvt/cvt.man.pre	2005-11-24 16:46:47.000000000 +0100
>@@ -0,0 +1,41 @@
>+.\" $XFree86$
>+.TH CVT 1 __vendorversion__
>+.SH NAME
>+cvt - calculate VESA CVT mode lines
>+.SH SYNOPSIS
>+.B cvt
>+.RB [ \-v | \-\-verbose ]
>+.RB [ \-r | \-\-reduced ]
>+.I h-resolution
>+.I v-resolution
>+.RB [ refresh ]
>+.SH DESCRIPTION
>+.I Cvt
>+is a utility for calculating VESA Common Video Timing modes.  Given the
>+desired horizontal and vertical resolutions, a modeline adhering to the CVT
>+standard is printed. This modeline can be included in __xservername__ 
>+.B __xconfigfile__(__filemansuffix__)
>+.
>+
>+.SH OPTIONS
>+.TP 8
>+.BR refresh
>+Provide a vertical refresh rate in kHz.  The CVT standard prefers either 50.0,
>+60.0, 75.0 or 85.0kHz.  The default is 60.0kHz.
>+.TP 8
>+.BR \-v | \-\-verbose
>+Warn verbosely when a given mode does not completely correspond with CVT
>+standards.
>+.TP 8
>+.BR \-r | \-\-reduced
>+Create a mode with reduced blanking.  This allows for higher frequency signals,
>+with a lower or equal dotclock. Not for Cathode Ray Tube based displays though.
>+
>+.SH "SEE ALSO"
>+__xconfigfile__(__filemansuffix__)
>+.SH AUTHOR
>+Luc Verhaegen.
>+.PP
>+This program is based on the Common Video Timing sample implementation
>+written by Graham Loveridge. This file is publically available at
>+<http://www.vesa.org/Public/CVT/CVTd6r1.xls>. CVT is a VESA trademark.
>diff -u -r -N /tmp/cvt/Makefile.am cvt/Makefile.am
>--- /tmp/cvt/Makefile.am	1970-01-01 01:00:00.000000000 +0100
>+++ cvt/Makefile.am	2005-11-24 08:55:55.000000000 +0100
>@@ -0,0 +1,43 @@
>+# Copyright 2005 Sun Microsystems, Inc.  All rights reserved.
>+# 
>+# Permission is hereby granted, free of charge, to any person obtaining a
>+# copy of this software and associated documentation files (the
>+# "Software"), to deal in the Software without restriction, including
>+# without limitation the rights to use, copy, modify, merge, publish,
>+# distribute, and/or sell copies of the Software, and to permit persons
>+# to whom the Software is furnished to do so, provided that the above
>+# copyright notice(s) and this permission notice appear in all copies of
>+# the Software and that both the above copyright notice(s) and this
>+# permission notice appear in supporting documentation.
>+# 
>+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
>+# OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
>+# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
>+# OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
>+# HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
>+# INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
>+# FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
>+# NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
>+# WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
>+# 
>+# Except as contained in this notice, the name of a copyright holder
>+# shall not be used in advertising or otherwise to promote the sale, use
>+# or other dealings in this Software without prior written authorization
>+# of the copyright holder.
>+# 
>+
>+bin_PROGRAMS = cvt
>+
>+DUMMYLIB_SRCDIR = $(XFREE86_SRCDIR)/dummylib
>+
>+cvt_SOURCES = cvt.c
>+cvt_CFLAGS = $(XORG_CFLAGS)
>+cvt_LDADD = ../../dummylib/libdummy-nonserver.a
>+
>+man1_MANS = cvt.man
>+
>+CLEANFILES = $(man1_MANS)
>+
>+include $(top_srcdir)/cpprules.in
>+
>+EXTRA_DIST = cvt.man.pre

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