Send raw coordinates to client but scale when getting relative
The current code scales the coordinates before sending to the client.
This changes the coordinates so when the client requests raw
coordinates, they are actually getting the scaled ones. Instead, don't
scale the coordinates in InputDispatcher and instead send the scale
factors to the client. When the client requests raw coordinates, they
will get the unscaled ones. When they request relative coordinates, they
will get the coordinates with the scale and offset applied.
Fixes: 140786233
Test: atest libinput_tests
Change-Id: I99b9ce7236511f595a8780506bf5aea8c75ed577
diff --git a/services/inputflinger/dispatcher/InputDispatcher.cpp b/services/inputflinger/dispatcher/InputDispatcher.cpp
index 5ae2419..3635f3b 100644
--- a/services/inputflinger/dispatcher/InputDispatcher.cpp
+++ b/services/inputflinger/dispatcher/InputDispatcher.cpp
@@ -2424,26 +2424,28 @@
PointerCoords scaledCoords[MAX_POINTERS];
const PointerCoords* usingCoords = motionEntry->pointerCoords;
- // Set the X and Y offset depending on the input source.
- float xOffset, yOffset;
+ // Set the X and Y offset and X and Y scale depending on the input source.
+ float xOffset = 0.0f, yOffset = 0.0f;
+ float xScale = 1.0f, yScale = 1.0f;
if ((motionEntry->source & AINPUT_SOURCE_CLASS_POINTER) &&
!(dispatchEntry->targetFlags & InputTarget::FLAG_ZERO_COORDS)) {
float globalScaleFactor = dispatchEntry->globalScaleFactor;
- float wxs = dispatchEntry->windowXScale;
- float wys = dispatchEntry->windowYScale;
- xOffset = dispatchEntry->xOffset * wxs;
- yOffset = dispatchEntry->yOffset * wys;
- if (wxs != 1.0f || wys != 1.0f || globalScaleFactor != 1.0f) {
+ xScale = dispatchEntry->windowXScale;
+ yScale = dispatchEntry->windowYScale;
+ xOffset = dispatchEntry->xOffset * xScale;
+ yOffset = dispatchEntry->yOffset * yScale;
+ if (globalScaleFactor != 1.0f) {
for (uint32_t i = 0; i < motionEntry->pointerCount; i++) {
scaledCoords[i] = motionEntry->pointerCoords[i];
- scaledCoords[i].scale(globalScaleFactor, wxs, wys);
+ // Don't apply window scale here since we don't want scale to affect raw
+ // coordinates. The scale will be sent back to the client and applied
+ // later when requesting relative coordinates.
+ scaledCoords[i].scale(globalScaleFactor, 1 /* windowXScale */,
+ 1 /* windowYScale */);
}
usingCoords = scaledCoords;
}
} else {
- xOffset = 0.0f;
- yOffset = 0.0f;
-
// We don't want the dispatch target to know.
if (dispatchEntry->targetFlags & InputTarget::FLAG_ZERO_COORDS) {
for (uint32_t i = 0; i < motionEntry->pointerCount; i++) {
@@ -2462,10 +2464,8 @@
dispatchEntry->resolvedFlags,
motionEntry->edgeFlags, motionEntry->metaState,
motionEntry->buttonState,
- motionEntry->classification,
- dispatchEntry->windowXScale,
- dispatchEntry->windowYScale, xOffset, yOffset,
- motionEntry->xPrecision,
+ motionEntry->classification, xScale, yScale,
+ xOffset, yOffset, motionEntry->xPrecision,
motionEntry->yPrecision,
motionEntry->xCursorPosition,
motionEntry->yCursorPosition,