public static ClipElement create(int saveCount, uiPath uiPath, uiMatrix3 matrix, float scale)
{
ClipElement newElement = ObjectPool <ClipElement> .alloc();
newElement.saveCount = saveCount;
var pathCache = uiPath.flatten(scale);
var fillMesh = pathCache.getFillMesh(out newElement.convex);
newElement.mesh = fillMesh.transform(matrix);
var vertices = newElement.mesh.vertices;
if (newElement.convex && vertices.Count == 4 && matrix.rectStaysRect() &&
(Mathf.Abs(vertices[0].x - vertices[1].x) < 1e-6 && Mathf.Abs(vertices[1].y - vertices[2].y) < 1e-6 &&
Mathf.Abs(vertices[2].x - vertices[3].x) < 1e-6 && Mathf.Abs(vertices[3].y - vertices[0].y) < 1e-6 ||
Mathf.Abs(vertices[0].y - vertices[1].y) < 1e-6 && Mathf.Abs(vertices[1].x - vertices[2].x) < 1e-6 &&
Mathf.Abs(vertices[2].y - vertices[3].y) < 1e-6 && Mathf.Abs(vertices[3].x - vertices[0].x) < 1e-6))
{
newElement.isRect = true;
newElement.rect = newElement.mesh.bounds;
}
else
{
newElement.isRect = false;
newElement.rect = null;
}
return(newElement);
}
void _drawPath(uiPath path, uiPaint paint)
{
D.assert(path != null);
//draw fast shadow
if (paint.maskFilter != null && paint.maskFilter.Value.style == BlurStyle.fast_shadow)
{
this._drawRRectShadow(path, paint);
return;
}
if (paint.style == PaintingStyle.fill)
{
var state = this._currentLayer.currentState;
var cache = path.flatten(state.scale * this._devicePixelRatio);
bool convex;
cache.computeFillMesh(this._fringeWidth, out convex);
var fillMesh = cache.fillMesh;
var strokeMesh = cache.strokeMesh;
var fmesh = fillMesh.transform(state.matrix);
var smesh = strokeMesh?.transform(state.matrix);
float strokeMult = 1.0f;
if (paint.maskFilter != null && paint.maskFilter.Value.sigma != 0)
{
this._drawWithMaskFilter(fmesh.bounds, paint, paint.maskFilter.Value, fmesh, smesh, convex, 0,
strokeMult, null,
uiRectHelper.zero, null, false, this.___drawPathDrawMeshCallback);
return;
}
this._drawPathDrawMeshCallback(paint, fmesh, smesh, convex, 1.0f, strokeMult, null, uiRectHelper.zero,
null, false);
}
else
{
var state = this._currentLayer.currentState;
float strokeWidth = (paint.strokeWidth * state.scale).clamp(0, 200.0f);
float alpha = 1.0f;
if (strokeWidth == 0)
{
strokeWidth = this._fringeWidth;
}
else if (strokeWidth < this._fringeWidth)
{
// If the stroke width is less than pixel size, use alpha to emulate coverage.
// Since coverage is area, scale by alpha*alpha.
alpha = (strokeWidth / this._fringeWidth).clamp(0.0f, 1.0f);
alpha *= alpha;
strokeWidth = this._fringeWidth;
}
strokeWidth = strokeWidth / state.scale * 0.5f;
float strokeMult = (this._fringeWidth * 0.5f + strokeWidth * 0.5f) / this._fringeWidth;
var cache = path.flatten(state.scale * this._devicePixelRatio);
cache.computeStrokeMesh(
strokeWidth,
this._fringeWidth,
paint.strokeCap,
paint.strokeJoin,
paint.strokeMiterLimit);
var strokeMesh = cache.strokeMesh;
var mesh = strokeMesh.transform(state.matrix);
if (paint.maskFilter != null && paint.maskFilter.Value.sigma != 0)
{
this._drawWithMaskFilter(mesh.bounds, paint, paint.maskFilter.Value, null, mesh, false, alpha,
strokeMult, null,
uiRectHelper.zero, null, false, this.___drawPathDrawMeshCallback2);
return;
}
this._drawPathDrawMeshCallback2(paint, null, mesh, false, alpha, strokeMult, null, uiRectHelper.zero,
null, false);
}
}
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 / 3f;
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);
var shadowColor = paint.color.withAlpha(128);
layer.draws.Add(CanvasShader.fastShadow(layer, mesh, sigma, path.isRect, path.isCircle, path.rRectCorner, new Vector4(bound.left, bound.top, bound.right, bound.bottom), shadowColor));
}