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fix(cursor): align painted and native minimum sizes

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This commit is contained in:
fufesou
2026-09-12 20:01:26 +08:00
parent 6934b3cb14
commit 8dfff101f8
2 changed files with 49 additions and 7 deletions
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8
flutter/lib/desktop/pages/remote_page.dart
View File

@@ -1423,10 +1423,14 @@ class CursorPaint extends StatelessWidget {
}
final image = m.image ?? preDefaultCursor.image;
final nativePixels = isWindows ? MediaQuery.devicePixelRatioOf(context) : 1.0;
// Match native registration's logical minimum for density-aware scaled views.
final logicalMinimum = (m.cache?.pixelRatio ?? 0) > 0 &&
c.viewStyle.style != kRemoteViewStyleOriginal;
final nativePixels = isWindows && !logicalMinimum
? MediaQuery.devicePixelRatioOf(context) : 1.0;
// Show remote cursor follows the image scale, independently of Zoom cursor.
double scale = _cursorImageScale(c.parent.target!, m);
if (image != null && scale * nativePixels != 1.0) {
if (image != null && (logicalMinimum || scale * nativePixels != 1.0)) {
final sx = kMinCursorSize / (image.width * nativePixels);
final sy = kMinCursorSize / (image.height * nativePixels);
// Preserve Original's short-edge minimum; scaled views use the long edge.

48
flutter/test/cursor_paint_scale_test.dart
View File

@@ -16,9 +16,12 @@ const _canvasOffset = Offset(15.125, 10.25);
const _viewport = Size(200, 160);
class _CursorModel extends ChangeNotifier implements CursorModel {
_CursorModel(this.image, this.position);
_CursorModel(this.image, this.position, this.density);
final Offset position;
final double density;
@override
CursorData get cache => _Density(density);
@override
final ui.Image image;
@@ -35,6 +38,12 @@ class _CursorModel extends ChangeNotifier implements CursorModel {
dynamic noSuchMethod(Invocation invocation) => super.noSuchMethod(invocation);
}
class _Density extends Fake implements CursorData {
_Density(this.pixelRatio);
@override
final double pixelRatio;
}
class _ImageModel extends Fake implements ImageModel {
_ImageModel(this.useTextureRender);
@@ -136,7 +145,7 @@ class _Canvas extends Fake implements Canvas {
Future<ImagePainter> _paintCursor(WidgetTester tester, CanvasModel canvas,
{double dpr = 2, bool zoom = true, (int, int) source = (48, 64),
Offset position = _remotePosition}) async {
Offset position = _remotePosition, double density = 0}) async {
final image = (await tester
.runAsync(() => createTestImage(width: source.$1, height: source.$2)))!;
addTearDown(image.dispose);
@@ -144,7 +153,7 @@ Future<ImagePainter> _paintCursor(WidgetTester tester, CanvasModel canvas,
data: MediaQueryData(devicePixelRatio: dpr),
child: MultiProvider(
providers: [
ChangeNotifierProvider<CursorModel>(create: (_) => _CursorModel(image, position)),
ChangeNotifierProvider<CursorModel>(create: (_) => _CursorModel(image, position, density)),
ChangeNotifierProvider<CanvasModel>(create: (_) => canvas),
],
child: CursorPaint(id: 'cursor-test', zoomCursor: zoom.obs),
@@ -156,7 +165,7 @@ Future<ImagePainter> _paintCursor(WidgetTester tester, CanvasModel canvas,
return painter;
}
void main() {
void _linuxDisplayTests() {
for (final (texture, displayScale, allDisplays) in [
(false, 2.0, false), (true, 2.0, false), (true, 2.0, true),
(false, 1.0, false), (true, 1.0, false),
@@ -175,7 +184,7 @@ void main() {
: peer.pi.displays.length - 1;
peer.rect = Rect.fromLTWH(allDisplays ? -960 : 0, 0, 3840, 2160);
final painter = await _paintCursor(tester, canvas,
dpr: 1, zoom: false, source: (64, 64),
dpr: 1, zoom: false, source: (64, 64), density: 2,
position: allDisplays ? _remotePosition + const Offset(960, 0)
: _remotePosition);
final pixelScale = 2 / displayScale;
@@ -189,6 +198,35 @@ void main() {
position * 2 + origin);
});
}
}
void _minimumTests() {
for (final (style, dpr, source, viewScale, expected) in [
(kRemoteViewStyleAdaptive, 1.0, (48, 64), 0.05, 0.1875),
(kRemoteViewStyleAdaptive, 2.0, (48, 64), 0.05, 0.1875),
(kRemoteViewStyleCustom, 1.0, (48, 64), 0.05, 0.1875),
(kRemoteViewStyleCustom, 2.0, (48, 64), 0.05, 0.1875),
(kRemoteViewStyleCustom, 2.0, (8, 10), 1.0, 1.2),
(kRemoteViewStyleOriginal, 1.0, (48, 64), 0.05, 0.25),
(kRemoteViewStyleOriginal, 2.0, (48, 64), 0.05, Platform.isWindows ? 0.125 : 0.25),
]) {
testWidgets('density-aware $style DPR=$dpr source=$source minimum',
(tester) async {
final painter = await _paintCursor(tester,
_CanvasModel(style, viewScale, true),
dpr: dpr, source: source, density: 2);
expect(painter.scale, expected);
final hotspot = (Offset(painter.x, painter.y) + _hotspot) * painter.scale;
final target = _remotePosition * viewScale + _canvasOffset;
expect(hotspot.dx, closeTo(target.dx, 1e-9));
expect(hotspot.dy, closeTo(target.dy, 1e-9));
});
}
}
void main() {
_linuxDisplayTests();
_minimumTests();
final minimumScale = Platform.isWindows ? 1 / 3 : 2 / 3;
for (final (style, zoom, dpr, source, canvasScale, scale, texture) in [
(kRemoteViewStyleAdaptive, false, 2.0, (48, 64), 0.375, 0.375, true),