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74 行
2.9 KiB

using Unity.UIWidgets.foundation;
using UnityEngine;
namespace Unity.UIWidgets.ui {
public partial class PictureFlusher {
void _drawRRectShadow(uiPath path, uiPaint paint) {
D.assert(path.isNaiveRRect, () => "Cannot draw fast Shadow for non-NaiveRRect shapes");
D.assert(paint.style == PaintingStyle.fill, () => "Cannot draw fast Shadow for stroke lines");
var layer = this._currentLayer;
var state = layer.currentState;
var cache = path.flatten(state.scale * this._devicePixelRatio);
bool convex;
cache.computeFillMesh(this._fringeWidth, out convex);
var fillMesh = cache.fillMesh;
var meshBounds = fillMesh.transform(state.matrix);
var clipBounds = layer.layerBounds;
uiRect? stackBounds;
bool iior;
layer.clipStack.getBounds(out stackBounds, out iior);
if (stackBounds != null) {
clipBounds = uiRectHelper.intersect(clipBounds, stackBounds.Value);
}
if (clipBounds.isEmpty) {
ObjectPool<uiMeshMesh>.release(meshBounds);
return;
}
var maskBounds = meshBounds.bounds;
maskBounds = uiRectHelper.intersect(maskBounds, clipBounds);
if (maskBounds.isEmpty) {
ObjectPool<uiMeshMesh>.release(meshBounds);
return;
}
var blurMesh = ImageMeshGenerator.imageMesh(null, uiRectHelper.one, maskBounds);
if (!this._applyClip(blurMesh.bounds)) {
ObjectPool<uiMeshMesh>.release(meshBounds);
ObjectPool<uiMeshMesh>.release(blurMesh);
return;
}
var bound = path.getBounds();
var sigma = state.scale * paint.maskFilter.Value.sigma;
var vertices = ObjectPool<uiList<Vector3>>.alloc();
vertices.SetCapacity(4);
vertices.Add(new Vector2(0, 0));
vertices.Add(new Vector2(1, 0));
vertices.Add(new Vector2(0, 1));
vertices.Add(new Vector2(1, 1));
var _triangles = ObjectPool<uiList<int>>.alloc();
_triangles.SetCapacity(6);
_triangles.Add(0);
_triangles.Add(1);
_triangles.Add(2);
_triangles.Add(2);
_triangles.Add(1);
_triangles.Add(3);
ObjectPool<uiMeshMesh>.release(meshBounds);
ObjectPool<uiMeshMesh>.release(blurMesh);
var mesh = uiMeshMesh.create(state.matrix, vertices, _triangles);
layer.draws.Add(CanvasShader.fastShadow(layer, mesh, sigma, path.isRect, path.isCircle, path.rRectCorner, new Vector4(bound.left, bound.top, bound.right, bound.bottom), paint.color));
}
}
}