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docs(cursor): explain image decoding and Retina sampling

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fufesou
2026-09-12 20:51:58 +08:00
parent bbf86259e9
commit 02e4f02815
2 changed files with 6 additions and 1 deletions
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4
flutter/lib/models/model.dart
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@@ -2995,7 +2995,9 @@ class PredefinedCursor {
() async {
_image?.dispose();
// PNG stores straight alpha; let the codec prepare the pixels for ui.Image.
// Native registration uses this ui.Image. The RGBA bytes from img2 are
// straight alpha, but PixelFormat.rgba8888 requires premultiplied alpha.
// Decode the PNG directly to preserve translucent cursor colors.
final codec = await ui.instantiateImageCodec(pngBytes);
final ui.Image nativeImage;
try {