andreacavalli/xserver-multidpi
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Input: Modify mask in-place in positionSprite

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Instead of taking pointers to x and y values to modify in
positionSprite, just modify the mask (as well as dev->last) in place.

Signed-off-by: Daniel Stone <daniel@fooishbar.org>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
This commit is contained in:
Daniel Stone 2011-03-02 17:18:48 +00:00 committed by Peter Hutterer
parent 629a575261
commit 3b7fb0f68d
1 changed files with 31 additions and 38 deletions
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69
dix/getevents.c
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@ -774,26 +774,34 @@ accelPointer(DeviceIntPtr dev, ValuatorMask* valuators, CARD32 ms)
*
* @param dev The device to be moved.
* @param mode Movement mode (Absolute or Relative)
* @param x Pointer to current x-axis value, may be modified.
* @param y Pointer to current y-axis value, may be modified.
* @param scr Screen the device's sprite is currently on.
* @param mask Mask of axis values for this event
* @param screenx Screen x coordinate the sprite is on after the update.
* @param screeny Screen y coordinate the sprite is on after the update.
*/
static void
positionSprite(DeviceIntPtr dev, int mode, double *x, double *y, ScreenPtr scr,
positionSprite(DeviceIntPtr dev, int mode, ScreenPtr scr, ValuatorMask *mask,
double *screenx, double *screeny)
{
int isx, isy; /* screen {x, y}, in int */
double x, y;
if (!dev->valuator || dev->valuator->numAxes < 2)
return;
/* scale x&y to screen */
*screenx = rescaleValuatorAxis(*x, dev->valuator->axes + 0, NULL,
scr->width);
if (valuator_mask_isset(mask, 0))
x = valuator_mask_get_double(mask, 0);
else
x = dev->last.valuators[0] + dev->last.remainder[0];
if (valuator_mask_isset(mask, 1))
y = valuator_mask_get_double(mask, 1);
else
y = dev->last.valuators[1] + dev->last.remainder[1];
*screeny = rescaleValuatorAxis(*y, dev->valuator->axes + 1, NULL,
/* scale x&y to screen */
*screenx = rescaleValuatorAxis(x, dev->valuator->axes + 0, NULL,
scr->width);
*screeny = rescaleValuatorAxis(y, dev->valuator->axes + 1, NULL,
scr->height);
/* miPointerSetPosition takes care of crossing screens for us, as well as
@ -807,14 +815,14 @@ positionSprite(DeviceIntPtr dev, int mode, double *x, double *y, ScreenPtr scr,
if (isx != trunc(*screenx))
{
*screenx -= trunc(*screenx) - isx;
*x = rescaleValuatorAxis(*screenx, NULL, dev->valuator->axes + 0,
scr->width);
x = rescaleValuatorAxis(*screenx, NULL, dev->valuator->axes + 0,
scr->width);
}
if (isy != trunc(*screeny))
{
*screeny -= trunc(*screeny) - isy;
*y = rescaleValuatorAxis(*screeny, NULL, dev->valuator->axes + 1,
scr->height);
y = rescaleValuatorAxis(*screeny, NULL, dev->valuator->axes + 1,
scr->height);
}
/* Update the MD's co-ordinates, which are always in screen space. */
@ -827,10 +835,15 @@ positionSprite(DeviceIntPtr dev, int mode, double *x, double *y, ScreenPtr scr,
}
/* dropy x/y (device coordinates) back into valuators for next event */
dev->last.valuators[0] = trunc(*x);
dev->last.valuators[1] = trunc(*y);
dev->last.remainder[0] = *x - trunc(*x);
dev->last.remainder[1] = *y - trunc(*y);
dev->last.valuators[0] = trunc(x);
dev->last.valuators[1] = trunc(y);
dev->last.remainder[0] = x - trunc(x);
dev->last.remainder[1] = y - trunc(y);
if (valuator_mask_isset(mask, 0))
valuator_mask_set_double(mask, 0, x);
if (valuator_mask_isset(mask, 1))
valuator_mask_set_double(mask, 1, y);
}
/**
@ -1076,8 +1089,7 @@ GetPointerEvents(InternalEvent *events, DeviceIntPtr pDev, int type, int buttons
CARD32 ms;
DeviceEvent *event;
RawDeviceEvent *raw;
double x = 0.0, y = 0.0; /* device coords */
double screenx = 0.0, screeny = 0.0; /* screen coords */
double screenx = 0.0, screeny = 0.0;
ScreenPtr scr = miPointerGetScreen(pDev);
ValuatorMask mask;
@ -1154,29 +1166,10 @@ GetPointerEvents(InternalEvent *events, DeviceIntPtr pDev, int type, int buttons
set_raw_valuators(raw, &mask, raw->valuators.data,
raw->valuators.data_frac);
if (valuator_mask_isset(&mask, 0))
x = valuator_mask_get_double(&mask, 0);
else
x = pDev->last.valuators[0] + pDev->last.remainder[0];
if (valuator_mask_isset(&mask, 1))
y = valuator_mask_get_double(&mask, 1);
else
y = pDev->last.valuators[1] + pDev->last.remainder[1];
positionSprite(pDev, (flags & POINTER_ABSOLUTE) ? Absolute : Relative,
&x, &y, scr, &screenx, &screeny);
if (valuator_mask_isset(&mask, 0))
valuator_mask_set_double(&mask, 0, x);
if (valuator_mask_isset(&mask, 1))
valuator_mask_set_double(&mask, 1, y);
positionSprite(pDev, (flags & POINTER_ABSOLUTE) ? Absolute : Relative, scr,
&mask, &screenx, &screeny);
updateHistory(pDev, &mask, ms);
/* Update the valuators with the true value sent to the client*/
if (valuator_mask_isset(&mask, 0))
valuator_mask_set(&mask, 0, x);
if (valuator_mask_isset(&mask, 1))
valuator_mask_set(&mask, 1, y);
clipValuators(pDev, &mask);
event = &events->device_event;