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Diffstat (limited to 'xorg-server/hw/xfree86/modes')
-rw-r--r--xorg-server/hw/xfree86/modes/xf86Crtc.c89
1 files changed, 89 insertions, 0 deletions
diff --git a/xorg-server/hw/xfree86/modes/xf86Crtc.c b/xorg-server/hw/xfree86/modes/xf86Crtc.c
index f9ae46596..e4b393cb1 100644
--- a/xorg-server/hw/xfree86/modes/xf86Crtc.c
+++ b/xorg-server/hw/xfree86/modes/xf86Crtc.c
@@ -428,6 +428,7 @@ extern XF86ConfigPtr xf86configptr;
typedef enum {
OPTION_PREFERRED_MODE,
+ OPTION_ZOOM_MODES,
OPTION_POSITION,
OPTION_BELOW,
OPTION_RIGHT_OF,
@@ -446,6 +447,7 @@ 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},
@@ -1418,6 +1420,90 @@ 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 *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 */
+ if (*len > 0)
+ return &(*token)[*len];
+ else
+ return NULL;
+}
+
+/** 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 specification matches the next output mode
+ * with the same name.
+ *
+ * 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)
{
@@ -1713,6 +1799,9 @@ 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) {