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Input: Convert positionSprite and GetPointerEvents to double

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Use doubles internally in both of these functions, eliminating most of
the remaining int co-ordinate usage.

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 17:04:57 +00:00 committed by Peter Hutterer
parent 51437995a5
commit 629a575261
1 changed files with 54 additions and 90 deletions
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144
dix/getevents.c
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@ -776,91 +776,61 @@ accelPointer(DeviceIntPtr dev, ValuatorMask* valuators, CARD32 ms)
* @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 x_frac Fractional part of current x-axis value, may be modified.
* @param y_frac Fractional part of current y-axis value, may be modified.
* @param scr Screen the device's sprite is currently on.
* @param screenx Screen x coordinate the sprite is on after the update.
* @param screeny Screen y coordinate the sprite is on after the update.
* @param screenx_frac Fractional part of screen x coordinate, as above.
* @param screeny_frac Fractional part of screen y coordinate, as above.
*/
static void
positionSprite(DeviceIntPtr dev, int mode,
int *x, int *y, float x_frac, float y_frac,
ScreenPtr scr, int *screenx, int *screeny, float *screenx_frac, float *screeny_frac)
positionSprite(DeviceIntPtr dev, int mode, double *x, double *y, ScreenPtr scr,
double *screenx, double *screeny)
{
int old_screenx, old_screeny;
double val, ret;
int isx, isy; /* screen {x, y}, in int */
if (!dev->valuator || dev->valuator->numAxes < 2)
return;
/* scale x&y to screen */
val = *x + x_frac;
ret = rescaleValuatorAxis(val, dev->valuator->axes + 0, NULL, scr->width);
*screenx = trunc(ret);
*screenx_frac = ret - trunc(ret);
*screenx = rescaleValuatorAxis(*x, dev->valuator->axes + 0, NULL,
scr->width);
val = *y + y_frac;
ret = rescaleValuatorAxis(val, dev->valuator->axes + 1, NULL, scr->height);
*screeny = trunc(ret);
*screeny_frac = ret - trunc(ret);
*screeny = rescaleValuatorAxis(*y, dev->valuator->axes + 1, NULL,
scr->height);
/* Hit the left screen edge? */
if (*screenx <= 0 && *screenx_frac < 0.0f)
/* miPointerSetPosition takes care of crossing screens for us, as well as
* clipping to the current screen. In the event we actually change screen,
* we just drop the float component on the floor, then convert from
* screenx back into device co-ordinates. */
isx = trunc(*screenx);
isy = trunc(*screeny);
miPointerSetPosition(dev, mode, &isx, &isy);
scr = miPointerGetScreen(dev);
if (isx != trunc(*screenx))
{
*screenx_frac = 0.0f;
x_frac = 0.0f;
*screenx -= trunc(*screenx) - isx;
*x = rescaleValuatorAxis(*screenx, NULL, dev->valuator->axes + 0,
scr->width);
}
if (*screeny <= 0 && *screeny_frac < 0.0f)
if (isy != trunc(*screeny))
{
*screeny_frac = 0.0f;
y_frac = 0.0f;
*screeny -= trunc(*screeny) - isy;
*y = rescaleValuatorAxis(*screeny, NULL, dev->valuator->axes + 1,
scr->height);
}
old_screenx = *screenx;
old_screeny = *screeny;
/* This takes care of crossing screens for us, as well as clipping
* to the current screen. */
miPointerSetPosition(dev, mode, screenx, screeny);
if(!IsMaster(dev) && !IsFloating(dev)) {
/* Update the MD's co-ordinates, which are always in screen space. */
if (!IsMaster(dev) || !IsFloating(dev)) {
DeviceIntPtr master = GetMaster(dev, MASTER_POINTER);
master->last.valuators[0] = *screenx;
master->last.valuators[1] = *screeny;
master->last.remainder[0] = *screenx_frac;
master->last.remainder[1] = *screeny_frac;
}
if (dev->valuator)
{
/* Crossed screen? Scale back to device coordiantes */
if(*screenx != old_screenx)
{
scr = miPointerGetScreen(dev);
val = *screenx + *screenx_frac;
ret = rescaleValuatorAxis(val, NULL, dev->valuator->axes + 0,
scr->width);
*x = trunc(ret);
x_frac = ret - trunc(ret);
}
if(*screeny != old_screeny)
{
scr = miPointerGetScreen(dev);
val = *screeny + *screeny_frac;
ret = rescaleValuatorAxis(val, NULL, dev->valuator->axes + 1,
scr->height);
*y = trunc(ret);
y_frac = ret - trunc(ret);
}
master->last.valuators[0] = trunc(*screenx);
master->last.remainder[0] = *screenx - trunc(*screenx);
master->last.valuators[1] = trunc(*screeny);
master->last.remainder[1] = *screeny - trunc(*screeny);
}
/* dropy x/y (device coordinates) back into valuators for next event */
dev->last.valuators[0] = *x;
dev->last.valuators[1] = *y;
dev->last.remainder[0] = x_frac;
dev->last.remainder[1] = y_frac;
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);
}
/**
@ -1106,9 +1076,8 @@ GetPointerEvents(InternalEvent *events, DeviceIntPtr pDev, int type, int buttons
CARD32 ms;
DeviceEvent *event;
RawDeviceEvent *raw;
int x = 0, y = 0, /* device coords */
cx, cy; /* only screen coordinates */
float x_frac = 0.0, y_frac = 0.0, cx_frac, cy_frac;
double x = 0.0, y = 0.0; /* device coords */
double screenx = 0.0, screeny = 0.0; /* screen coords */
ScreenPtr scr = miPointerGetScreen(pDev);
ValuatorMask mask;
@ -1155,7 +1124,7 @@ GetPointerEvents(InternalEvent *events, DeviceIntPtr pDev, int type, int buttons
{
if (flags & POINTER_SCREEN) /* valuators are in screen coords */
{
int scaled;
double scaled;
if (valuator_mask_isset(&mask, 0))
{
@ -1185,27 +1154,21 @@ 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)) {
double tmp = valuator_mask_get_double(&mask, 0);
x = trunc(tmp);
x_frac = tmp - x;
}
else {
x = pDev->last.valuators[0];
x_frac = pDev->last.remainder[0];
}
if (valuator_mask_isset(&mask, 1)) {
double tmp = valuator_mask_get_double(&mask, 1);
y = trunc(tmp);
y_frac = tmp - y;
}
else {
y = pDev->last.valuators[1];
y_frac = pDev->last.remainder[1];
}
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, x_frac, y_frac, scr, &cx, &cy, &cx_frac, &cy_frac);
&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);
updateHistory(pDev, &mask, ms);
/* Update the valuators with the true value sent to the client*/
@ -1235,10 +1198,11 @@ GetPointerEvents(InternalEvent *events, DeviceIntPtr pDev, int type, int buttons
event->detail.button = buttons;
}
event->root_x = cx; /* root_x/y always in screen coords */
event->root_y = cy;
event->root_x_frac = cx_frac;
event->root_y_frac = cy_frac;
/* root_x and root_y must be in screen co-ordinates */
event->root_x = trunc(screenx);
event->root_y = trunc(screeny);
event->root_x_frac = screenx - trunc(screenx);
event->root_y_frac = screeny - trunc(screeny);
set_valuators(pDev, event, &mask);