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Fixed touch normalized coordinates

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When converting normalized coordinates to pixel coordinates, the valid range is 0 to (width or height) - 1, and the pixel coordinate of width or height is past the edge of the window.

Fixes https://github.com/libsdl-org/SDL/issues/2913
This commit is contained in:
Sam Lantinga 2023-11-05 00:03:23 -07:00
parent ff3c20a799
commit 9302d7732d
6 changed files with 72 additions and 16 deletions
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30
android-project/app/src/main/java/org/libsdl/app/SDLSurface.java
View file

@ -196,6 +196,24 @@ public class SDLSurface extends SurfaceView implements SurfaceHolder.Callback,
return SDLActivity.handleKeyEvent(v, keyCode, event, null);
}
private float getNormalizedX(float x)
{
if (mWidth <= 1) {
return 0.5f;
} else {
return (x / (mWidth - 1));
}
}
private float getNormalizedY(float y)
{
if (mHeight <= 1) {
return 0.5f;
} else {
return (y / (mHeight - 1));
}
}
// Touch events
@Override
public boolean onTouch(View v, MotionEvent event) {
@ -242,8 +260,8 @@ public class SDLSurface extends SurfaceView implements SurfaceHolder.Callback,
case MotionEvent.ACTION_MOVE:
for (i = 0; i < pointerCount; i++) {
pointerFingerId = event.getPointerId(i);
x = event.getX(i) / mWidth;
y = event.getY(i) / mHeight;
x = getNormalizedX(event.getX(i));
y = getNormalizedY(event.getY(i));
p = event.getPressure(i);
if (p > 1.0f) {
// may be larger than 1.0f on some devices
@ -267,8 +285,8 @@ public class SDLSurface extends SurfaceView implements SurfaceHolder.Callback,
}
pointerFingerId = event.getPointerId(i);
x = event.getX(i) / mWidth;
y = event.getY(i) / mHeight;
x = getNormalizedX(event.getX(i));
y = getNormalizedY(event.getY(i));
p = event.getPressure(i);
if (p > 1.0f) {
// may be larger than 1.0f on some devices
@ -281,8 +299,8 @@ public class SDLSurface extends SurfaceView implements SurfaceHolder.Callback,
case MotionEvent.ACTION_CANCEL:
for (i = 0; i < pointerCount; i++) {
pointerFingerId = event.getPointerId(i);
x = event.getX(i) / mWidth;
y = event.getY(i) / mHeight;
x = getNormalizedX(event.getX(i));
y = getNormalizedY(event.getY(i));
p = event.getPressure(i);
if (p > 1.0f) {
// may be larger than 1.0f on some devices