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kdrive: add support to +X+Y syntax in -screen option parsing

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This patch enhances current -screen option parsing for kdrive-based
applications. It can parse strings like
<WIDTH>x<HEIGHT>+<XOFFSET>+<YOFFSET>, storing X and Y offsets
in KdScreenInfo instances.

For negative values, this patch supports +-X+-Y (not -X-Y) syntax.

It will allow e.g. proper Xephyr window placement for multiseat
purposes.

Signed-off-by: Laércio de Sousa <laerciosousa@sme-mogidascruzes.sp.gov.br>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
This commit is contained in:
Laércio de Sousa 2014-08-18 08:45:41 -03:00 committed by Keith Packard
parent fe5018e056
commit 376f4de8ae
2 changed files with 21 additions and 4 deletions
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23
hw/kdrive/src/kdrive.c
View File

@ -300,6 +300,8 @@ KdParseScreen(KdScreenInfo * screen, const char *arg)
screen->softCursor = kdSoftCursor;
screen->origin = kdOrigin;
screen->randr = RR_Rotate_0;
screen->x = 0;
screen->y = 0;
screen->width = 0;
screen->height = 0;
screen->width_mm = 0;
@ -313,7 +315,7 @@ KdParseScreen(KdScreenInfo * screen, const char *arg)
return;
for (i = 0; i < 2; i++) {
arg = KdParseFindNext(arg, "x/@XY", save, &delim);
arg = KdParseFindNext(arg, "x/+@XY", save, &delim);
if (!save[0])
return;
@ -321,7 +323,7 @@ KdParseScreen(KdScreenInfo * screen, const char *arg)
mm = 0;
if (delim == '/') {
arg = KdParseFindNext(arg, "x@XY", save, &delim);
arg = KdParseFindNext(arg, "x+@XY", save, &delim);
if (!save[0])
return;
mm = atoi(save);
@ -335,7 +337,8 @@ KdParseScreen(KdScreenInfo * screen, const char *arg)
screen->height = pixels;
screen->height_mm = mm;
}
if (delim != 'x' && delim != '@' && delim != 'X' && delim != 'Y' &&
if (delim != 'x' && delim != '+' && delim != '@' &&
delim != 'X' && delim != 'Y' &&
(delim != '\0' || i == 0))
return;
}
@ -346,6 +349,18 @@ KdParseScreen(KdScreenInfo * screen, const char *arg)
kdSoftCursor = FALSE;
kdSubpixelOrder = SubPixelUnknown;
if (delim == '+') {
arg = KdParseFindNext(arg, "+@xXY", save, &delim);
if (save[0])
screen->x = atoi(save);
}
if (delim == '+') {
arg = KdParseFindNext(arg, "@xXY", save, &delim);
if (save[0])
screen->y = atoi(save);
}
if (delim == '@') {
arg = KdParseFindNext(arg, "xXY", save, &delim);
if (save[0]) {
@ -425,7 +440,7 @@ KdUseMsg(void)
{
ErrorF("\nTinyX Device Dependent Usage:\n");
ErrorF
("-screen WIDTH[/WIDTHMM]xHEIGHT[/HEIGHTMM][@ROTATION][X][Y][xDEPTH/BPP[xFREQ]] Specify screen characteristics\n");
("-screen WIDTH[/WIDTHMM]xHEIGHT[/HEIGHTMM][+[-]XOFFSET][+[-]YOFFSET][@ROTATION][X][Y][xDEPTH/BPP[xFREQ]] Specify screen characteristics\n");
ErrorF
("-rgba rgb/bgr/vrgb/vbgr/none Specify subpixel ordering for LCD panels\n");
ErrorF

2
hw/kdrive/src/kdrive.h
View File

@ -89,6 +89,8 @@ typedef struct _KdScreenInfo {
ScreenPtr pScreen;
void *driver;
Rotation randr; /* rotation and reflection */
int x;
int y;
int width;
int height;
int rate;