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fix: wake render thread directly to stop FPS drop during touch input #538

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fix: wake render thread directly to stop FPS drop during touch input #538

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055dd99
fix: wake render thread directly to stop FPS drop during touch input
maxjivi05 Jun 9, 2026
bc9764a
Merge branch 'main' into touchscreen-fps-fix
Xnick417x Jun 16, 2026
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14 changes: 2 additions & 12 deletions app/src/main/runtime/display/renderer/VulkanRenderer.java
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Original file line number Diff line number Diff line change
Expand Up @@ -3,10 +3,8 @@
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Handler;
import android.os.Looper;
import android.util.Log;
import android.view.Choreographer;
import android.view.Surface;
import androidx.preference.PreferenceManager;
import com.winlator.cmod.BuildConfig;
Expand Down Expand Up @@ -119,9 +117,6 @@ public void setSwapRB(boolean v) {

private final ByteBuffer sceneBuf =
ByteBuffer.allocateDirect(SCENE_BUF_SIZE).order(ByteOrder.nativeOrder());
private final Handler mainHandler = new Handler(Looper.getMainLooper());
private final AtomicBoolean renderRequested = new AtomicBoolean(false);

// Reusable scratch — sized once, refilled per frame.
private final float[] sceneXform = XForm.getInstance();
// Effect.writeParams writes into a float[]; we copy into the ByteBuffer afterwards.
Expand Down Expand Up @@ -169,13 +164,8 @@ public void destroy() {
}

public void requestRenderCoalesced() {
if (renderRequested.compareAndSet(false, true)) {
mainHandler.post(() ->
Choreographer.getInstance().postFrameCallback(frameTimeNanos -> {
renderRequested.set(false);
xServerView.requestRender();
}));
}
// Wake the render thread directly; the UI-thread/Choreographer hop stalls under touch input.
xServerView.requestRender();
}

private Drawable createRootCursorDrawable() {
Expand Down