Attachment 69915 Details for Bug 17954 – monitor Option "ZoomModes": xserver code and manual page description

[patch] monitor Option "ZoomModes": xserver code and manual page description

0001-Add-monitor-Option-ZoomModes.patch (text/plain), 5.58 KB, created by vdb128 on 2012-11-11 21:47:15 UTC

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Creator: vdb128

Created: 2012-11-11 21:47:15 UTC

Size: 5.58 KB

patch

obsolete

>From 6c6ad6771c02ea6b1e6b73e50c3be7e3c5bf924c Mon Sep 17 00:00:00 2001
>From: Servaas Vandenberghe <vdb@picaros.org>
>Date: Sun, 11 Nov 2012 19:13:17 +0100
>Subject: [PATCH] Add monitor Option "ZoomModes"
>
>Add support for the Option "ZoomModes" in a monitor section:
>
>Section "Monitor"
>  Identifier "a21inch"
>  Option "PreferredMode" "1600x1200"
>  Option "ZoomModes" "1600x1200 1280x1024 1280x1024 640x480"
>EndSection
>
>The option's effect is to search for and mark once each named mode in
>the output modes list.  So the specification order is free and the zoom
>modes order follows the order of the output modes list.  All marked
>modes are available via the Ctrl+Alt+Keypad-{Plus,Minus} key
>combination.
>
>Signed-off-by: Servaas Vandenberghe <vdb@picaros.org>
>---
> hw/xfree86/man/xorg.conf.man |   10 +++++
> hw/xfree86/modes/xf86Crtc.c  |   87 ++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 97 insertions(+), 0 deletions(-)
>
>diff --git a/hw/xfree86/man/xorg.conf.man b/hw/xfree86/man/xorg.conf.man
>index 5d92bbe..729d301 100644
>--- a/hw/xfree86/man/xorg.conf.man
>+++ b/hw/xfree86/man/xorg.conf.man
>@@ -1676,6 +1676,16 @@ This optional entry specifies a mode to be marked as the preferred initial mode
> of the monitor.
> (RandR 1.2-supporting drivers only)
> .TP 7
>+.BI "Option \*qZoomModes\*q \*q" name " " name " " ... \*q
>+This optional entry specifies modes to be marked as zoom modes.
>+It is possible to switch to the next and previous mode via
>+.BR Ctrl+Alt+Keypad\-Plus " and " Ctrl+Alt+Keypad\-Minus .
>+All these keypad available modes are selected from the screen mode
>+list.  This list is a copy of the compatibility output monitor mode
>+list.  Since this output is the output connected to the lowest
>+dot\-area monitor, as determined from its largest size mode, that
>+monitor defines the available zoom modes.
>+.TP 7
> .BI "Option \*qPosition\*q \*q" x " " y \*q
> This optional entry specifies the position of the monitor within the X
> screen.
>diff --git a/hw/xfree86/modes/xf86Crtc.c b/hw/xfree86/modes/xf86Crtc.c
>index 154f684..2e46885 100644
>--- a/hw/xfree86/modes/xf86Crtc.c
>+++ b/hw/xfree86/modes/xf86Crtc.c
>@@ -427,6 +427,7 @@ extern XF86ConfigPtr xf86configptr;
> 
> typedef enum {
>     OPTION_PREFERRED_MODE,
>+    OPTION_ZOOM_MODES,
>     OPTION_POSITION,
>     OPTION_BELOW,
>     OPTION_RIGHT_OF,
>@@ -445,6 +446,7 @@ typedef enum {
> 
> static OptionInfoRec xf86OutputOptions[] = {
>     {OPTION_PREFERRED_MODE, "PreferredMode", OPTV_STRING, {0}, FALSE},
>+    {OPTION_ZOOM_MODES, "ZoomModes", OPTV_STRING, {0}, FALSE },
>     {OPTION_POSITION, "Position", OPTV_STRING, {0}, FALSE},
>     {OPTION_BELOW, "Below", OPTV_STRING, {0}, FALSE},
>     {OPTION_RIGHT_OF, "RightOf", OPTV_STRING, {0}, FALSE},
>@@ -1424,6 +1426,88 @@ preferredMode(ScrnInfoPtr pScrn, xf86OutputPtr output)
>     return preferred_mode;
> }
> 
>+/** identify a token
>+ * args
>+ *   *src     a string with zero or more tokens, e.g. "tok0 tok1",
>+ *   **token  stores a pointer to the first token character,
>+ *   *len     stores the token length.
>+ * return
>+ *   a pointer into src[] at the token terminating character, or
>+ *   NULL if no token is found.
>+ */
>+static const char *
>+gettoken(const char *src, const char **token, int *len)
>+{
>+    const char *next, *delim = " \t";
>+    int skip;
>+
>+    if (!src)
>+        return NULL;
>+
>+    skip = strspn(src, delim);
>+    *token = &src[skip];
>+
>+    *len = strcspn(*token, delim);
>+    /* Support for backslash escaped delimiters could be implemented
>+     * here.
>+     */
>+
>+    /* (*token)[0] != '\0'  <==>  *len > 0 */
>+    next = *len > 0 ? &(*token)[*len] : NULL;
>+
>+    return next;
>+}
>+
>+/** Check for a user configured zoom mode list, Option "ZoomModes":
>+ *
>+ * Section "Monitor"
>+ *   Identifier "a21inch"
>+ *   Option "ZoomModes" "1600x1200 1280x1024 1280x1024 640x480"
>+ * EndSection
>+ *
>+ * Each user mode name is searched for independently so the list
>+ * specification order is free.  An output mode is matched at most
>+ * once, a mode with an already set M_T_USERDEF type bit is skipped.
>+ * Thus a repeat mode name specificaton matches the next output mode.
>+ *
>+ * Ctrl+Alt+Keypad-{Plus,Minus} zooms {in,out} by selecting the
>+ * {next,previous} M_T_USERDEF mode in the screen modes list, itself
>+ * sorted toward lower dot area or lower dot clock frequency, see
>+ *   modes/xf86Crtc.c: xf86SortModes() xf86SetScrnInfoModes(), and
>+ *   common/xf86Cursor.c: xf86ZoomViewport().
>+ */
>+static int
>+processZoomModes(xf86OutputPtr output)
>+{
>+    const char *zoom_modes;
>+    int count = 0;
>+
>+    zoom_modes = xf86GetOptValString(output->options, OPTION_ZOOM_MODES);
>+
>+    if (zoom_modes) {
>+        const char *token, *next;
>+        int len;
>+
>+        next = gettoken(zoom_modes, &token, &len);
>+        while (next) {
>+            DisplayModePtr mode;
>+
>+            for (mode = output->probed_modes; mode; mode = mode->next)
>+                if (!strncmp(token, mode->name, len)  /* prefix match */
>+                    && mode->name[len] == '\0'        /* equal length */
>+                    && !(mode->type & M_T_USERDEF)) { /* no rematch */
>+                    mode->type |= M_T_USERDEF;
>+                    break;
>+                }
>+
>+            count++;
>+            next = gettoken(next, &token, &len);
>+        }
>+    }
>+
>+    return count;
>+}
>+
> static void
> GuessRangeFromModes(MonPtr mon, DisplayModePtr mode)
> {
>@@ -1719,6 +1803,9 @@ xf86ProbeOutputModes(ScrnInfoPtr scrn, int maxX, int maxY)
>             }
>         }
> 
>+        /* Ctrl+Alt+Keypad-{Plus,Minus} zoom mode: M_T_USERDEF mode type */
>+        processZoomModes(output);
>+
>         output->initial_rotation = xf86OutputInitialRotation(output);
> 
>         if (debug_modes) {
>-- 
>1.7.4.5
>

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