diff options
Diffstat (limited to 'xorg-server/hw/xfree86/modes')
-rw-r--r-- | xorg-server/hw/xfree86/modes/xf86Crtc.c | 89 |
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) { |