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Merge remote-tracking branch 'whot/two-screen-coordinates'

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This commit is contained in:
Keith Packard
2011-11-02 21:20:07 -07:00
parent 8df3a9ca5a 401150d7dc
commit d91aa0e660
14 changed files with 270 additions and 67 deletions
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142
dix/getevents.c
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@@ -257,10 +257,10 @@ CreateClassesChangedEvent(InternalEvent* event,
*/
static double
rescaleValuatorAxis(double coord, AxisInfoPtr from, AxisInfoPtr to,
double defmax)
double defmin, double defmax)
{
double fmin = 0.0, fmax = defmax;
double tmin = 0.0, tmax = defmax;
double fmin = defmin, fmax = defmax;
double tmin = defmin, tmax = defmax;
if (from && from->min_value < from->max_value) {
fmin = from->min_value;
@@ -295,7 +295,7 @@ updateSlaveDeviceCoords(DeviceIntPtr master, DeviceIntPtr pDev)
int i;
DeviceIntPtr lastSlave;
/* master->last.valuators[0]/[1] is in screen coords and the actual
/* master->last.valuators[0]/[1] is in desktop-wide coords and the actual
* position of the pointer */
pDev->last.valuators[0] = master->last.valuators[0];
pDev->last.valuators[1] = master->last.valuators[1];
@@ -309,14 +309,14 @@ updateSlaveDeviceCoords(DeviceIntPtr master, DeviceIntPtr pDev)
pDev->last.valuators[0] = rescaleValuatorAxis(pDev->last.valuators[0],
NULL,
pDev->valuator->axes + 0,
scr->width);
0, scr->width);
}
if(pDev->valuator->numAxes > 1)
{
pDev->last.valuators[1] = rescaleValuatorAxis(pDev->last.valuators[1],
NULL,
pDev->valuator->axes + 1,
scr->height);
0, scr->height);
}
/* calculate the other axis as well based on info from the old
@@ -333,7 +333,7 @@ updateSlaveDeviceCoords(DeviceIntPtr master, DeviceIntPtr pDev)
{
double val = pDev->last.valuators[i];
val = rescaleValuatorAxis(val, lastSlave->valuator->axes + i,
pDev->valuator->axes + i, 0);
pDev->valuator->axes + i, 0, 0);
pDev->last.valuators[i] = val;
}
}
@@ -445,7 +445,7 @@ GetMotionHistory(DeviceIntPtr pDev, xTimecoord **buff, unsigned long start,
/* scale to screen coords */
to = &core_axis;
to->max_value = pScreen->width;
coord = rescaleValuatorAxis(coord, &from, to, pScreen->width);
coord = rescaleValuatorAxis(coord, &from, to, 0, pScreen->width);
memcpy(corebuf, &coord, sizeof(INT16));
corebuf++;
@@ -456,7 +456,7 @@ GetMotionHistory(DeviceIntPtr pDev, xTimecoord **buff, unsigned long start,
memcpy(&coord, icbuf++, sizeof(INT32));
to->max_value = pScreen->height;
coord = rescaleValuatorAxis(coord, &from, to, pScreen->height);
coord = rescaleValuatorAxis(coord, &from, to, 0, pScreen->height);
memcpy(corebuf, &coord, sizeof(INT16));
} else if (IsMaster(pDev))
@@ -484,7 +484,7 @@ GetMotionHistory(DeviceIntPtr pDev, xTimecoord **buff, unsigned long start,
from.max_value = pScreen->height;
/* scale from stored range into current range */
coord = rescaleValuatorAxis(coord, &from, to, 0);
coord = rescaleValuatorAxis(coord, &from, to, 0, 0);
memcpy(ocbuf, &coord, sizeof(INT32));
ocbuf++;
}
@@ -757,8 +757,8 @@ accelPointer(DeviceIntPtr dev, ValuatorMask* valuators, CARD32 ms)
* device's coordinate range.
*
* @param dev The device to scale for.
* @param[in, out] mask The mask in sceen coordinates, modified in place to
* contain device coordinate range.
* @param[in, out] mask The mask in desktop coordinates, modified in place
* to contain device coordinate range.
*/
static void
scale_from_screen(DeviceIntPtr dev, ValuatorMask *mask)
@@ -768,16 +768,18 @@ scale_from_screen(DeviceIntPtr dev, ValuatorMask *mask)
if (valuator_mask_isset(mask, 0))
{
scaled = rescaleValuatorAxis(valuator_mask_get_double(mask, 0),
scaled = valuator_mask_get_double(mask, 0) + scr->x;
scaled = rescaleValuatorAxis(scaled,
NULL, dev->valuator->axes + 0,
scr->width);
0, scr->width);
valuator_mask_set_double(mask, 0, scaled);
}
if (valuator_mask_isset(mask, 1))
{
scaled = rescaleValuatorAxis(valuator_mask_get_double(mask, 1),
scaled = valuator_mask_get_double(mask, 1) + scr->y;
scaled = rescaleValuatorAxis(scaled,
NULL, dev->valuator->axes + 1,
scr->height);
0, scr->height);
valuator_mask_set_double(mask, 1, scaled);
}
}
@@ -793,16 +795,21 @@ scale_from_screen(DeviceIntPtr dev, ValuatorMask *mask)
*
* The coordinates provided are always absolute. The parameter mode
* specifies whether it was relative or absolute movement that landed us at
* those coordinates.
* those coordinates. see fill_pointer_events for information on coordinate
* systems.
*
* @param dev The device to be moved.
* @param mode Movement mode (Absolute or Relative)
* @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.
* @param[in,out] mask Mask of axis values for this event, returns the
* per-screen device coordinates after confinement
* @param[out] devx x desktop-wide coordinate in device coordinate system
* @param[out] devy y desktop-wide coordinate in device coordinate system
* @param[out] screenx x coordinate in desktop coordinate system
* @param[out] screeny y coordinate in desktop coordinate system
*/
static ScreenPtr
positionSprite(DeviceIntPtr dev, int mode, ValuatorMask *mask,
double *devx, double *devy,
double *screenx, double *screeny)
{
double x, y;
@@ -821,16 +828,20 @@ positionSprite(DeviceIntPtr dev, int mode, ValuatorMask *mask,
else
y = dev->last.valuators[1];
/* scale x&y to screen */
/* scale x&y to desktop coordinates */
*screenx = rescaleValuatorAxis(x, dev->valuator->axes + 0, NULL,
scr->width);
screenInfo.x, screenInfo.width);
*screeny = rescaleValuatorAxis(y, dev->valuator->axes + 1, NULL,
scr->height);
screenInfo.y, screenInfo.height);
tmpx = *screenx;
tmpy = *screeny;
*devx = x;
*devy = y;
/* miPointerSetPosition takes care of crossing screens for us, as well as
* clipping to the current screen. */
* clipping to the current screen. Coordinates returned are in desktop
* coord system */
scr = miPointerSetPosition(dev, mode, screenx, screeny);
/* If we were constrained, rescale x/y from the screen coordinates so
@@ -838,17 +849,24 @@ positionSprite(DeviceIntPtr dev, int mode, ValuatorMask *mask,
* crossing this doesn't matter much, the coords would be 0 or max.
*/
if (tmpx != *screenx)
x = rescaleValuatorAxis(*screenx, NULL, dev->valuator->axes + 0,
scr->width);
*devx = rescaleValuatorAxis(*screenx, NULL, dev->valuator->axes + 0,
screenInfo.x, screenInfo.width);
if (tmpy != *screeny)
y = rescaleValuatorAxis(*screeny, NULL, dev->valuator->axes + 1,
scr->height);
*devy = rescaleValuatorAxis(*screeny, NULL, dev->valuator->axes + 1,
screenInfo.y, screenInfo.height);
if (valuator_mask_isset(mask, 0))
/* Recalculate the per-screen device coordinates */
if (valuator_mask_isset(mask, 0)) {
x = rescaleValuatorAxis(*screenx - scr->x, NULL, dev->valuator->axes + 0,
0, scr->width);
valuator_mask_set_double(mask, 0, x);
if (valuator_mask_isset(mask, 1))
}
if (valuator_mask_isset(mask, 1)) {
y = rescaleValuatorAxis(*screeny - scr->y, NULL, dev->valuator->axes + 1,
0, scr->height);
valuator_mask_set_double(mask, 1, y);
}
return scr;
}
@@ -1105,6 +1123,38 @@ QueuePointerEvents(DeviceIntPtr device, int type,
*
* Should not be called by anyone other than GetPointerEvents.
*
* We use several different coordinate systems and need to switch between
* the three in fill_pointer_events, positionSprite and
* miPointerSetPosition. "desktop" refers to the width/height of all
* screenInfo.screens[n]->width/height added up. "screen" is ScreenRec, not
* output.
*
* Coordinate systems:
* - relative events have a mask_in in relative coordinates, mapped to
* pixels. These events are mapped to the current position±delta.
* - absolute events have a mask_in in absolute device coordinates in
* device-specific range. This range is mapped to the desktop.
* - POINTER_SCREEN absolute events (x86WarpCursor) are in screen-relative
* screen coordinate range.
* - rootx/rooty in events must be be relative to the current screen's
* origin (screen coordinate system)
* - XI2 valuators must be relative to the current screen's origin. On
* the protocol the device min/max range maps to the current screen.
*
* For screen switching we need to get the desktop coordinates for each
* event, then map that to the respective position on each screen and
* position the cursor there.
* The device's last.valuator[] stores the last position in desktop-wide
* coordinates (in device range for slave devices, desktop range for master
* devices).
*
* screen-relative device coordinates requires scaling: A device coordinate
* x/y of range [n..m] that maps to positions Sx/Sy on Screen S must be
* rescaled to match Sx/Sy for [n..m]. In the simplest example, x of (m/2-1)
* is the last coordinate on the first screen and must be rescaled for the
* event to be m. XI2 clients that do their own coordinate mapping would
* otherwise interpret the position of the device elsewere to the cursor.
*
* @return the number of events written into events.
*/
static int
@@ -1115,8 +1165,10 @@ fill_pointer_events(InternalEvent *events, DeviceIntPtr pDev, int type,
int num_events = 1, i;
DeviceEvent *event;
RawDeviceEvent *raw;
double screenx = 0.0, screeny = 0.0;
double screenx = 0.0, screeny = 0.0; /* desktop coordinate system */
double devx = 0.0, devy = 0.0; /* desktop-wide in device coords */
ValuatorMask mask;
ScreenPtr scr;
switch (type)
{
@@ -1155,6 +1207,8 @@ fill_pointer_events(InternalEvent *events, DeviceIntPtr pDev, int type,
set_raw_valuators(raw, &mask, raw->valuators.data_raw);
}
/* valuators are in driver-native format (rel or abs) */
if (flags & POINTER_ABSOLUTE)
{
if (flags & POINTER_SCREEN) /* valuators are in screen coords */
@@ -1168,22 +1222,34 @@ fill_pointer_events(InternalEvent *events, DeviceIntPtr pDev, int type,
moveRelative(pDev, &mask);
}
/* valuators are in device coordinate system in absolute coordinates */
if ((flags & POINTER_NORAW) == 0)
set_raw_valuators(raw, &mask, raw->valuators.data);
positionSprite(pDev, (flags & POINTER_ABSOLUTE) ? Absolute : Relative,
&mask, &screenx, &screeny);
scr = positionSprite(pDev, (flags & POINTER_ABSOLUTE) ? Absolute : Relative,
&mask, &devx, &devy, &screenx, &screeny);
/* screenx, screeny are in desktop coordinates,
mask is in device coordinates per-screen (the event data)
devx/devy is in device coordinate desktop-wide */
updateHistory(pDev, &mask, ms);
clipValuators(pDev, &mask);
for (i = 0; i < valuator_mask_size(&mask); i++)
/* store desktop-wide in last.valuators */
if (valuator_mask_isset(&mask, 0))
pDev->last.valuators[0] = devx;
if (valuator_mask_isset(&mask, 1))
pDev->last.valuators[1] = devy;
for (i = 2; i < valuator_mask_size(&mask); i++)
{
if (valuator_mask_isset(&mask, i))
pDev->last.valuators[i] = valuator_mask_get_double(&mask, i);
}
/* Update the MD's co-ordinates, which are always in screen space. */
/* Update the MD's co-ordinates, which are always in desktop space. */
if (!IsMaster(pDev) || !IsFloating(pDev)) {
DeviceIntPtr master = GetMaster(pDev, MASTER_POINTER);
master->last.valuators[0] = screenx;
@@ -1209,8 +1275,8 @@ fill_pointer_events(InternalEvent *events, DeviceIntPtr pDev, int type,
event->detail.button = buttons;
}
/* root_x and root_y must be in screen co-ordinates */
event_set_root_coordinates(event, screenx, screeny);
/* root_x and root_y must be in per-screen co-ordinates */
event_set_root_coordinates(event, screenx - scr->x, screeny - scr->y);
if (flags & POINTER_EMULATED) {
raw->flags = XIPointerEmulated;