示例#1
0
        bool _applyClip(uiRect?queryBounds)
        {
            if (queryBounds == null || queryBounds.Value.isEmpty)
            {
                return(false);
            }

            var         layer       = this._currentLayer;
            var         layerBounds = layer.layerBounds;
            ReducedClip reducedClip = ReducedClip.create(layer.clipStack, layerBounds, queryBounds.Value);

            if (reducedClip.isEmpty())
            {
                ObjectPool <ReducedClip> .release(reducedClip);

                return(false);
            }

            var scissor      = reducedClip.scissor;
            var physicalRect = uiRectHelper.fromLTRB(0, 0, layer.width, layer.height);

            if (uiRectHelper.equals(scissor, layerBounds))
            {
                this._tryAddScissor(layer, null);
            }
            else
            {
                var deviceScissor = uiRectHelper.fromLTRB(
                    scissor.Value.left - layerBounds.left, layerBounds.bottom - scissor.Value.bottom,
                    scissor.Value.right - layerBounds.left, layerBounds.bottom - scissor.Value.top
                    );
                deviceScissor = uiRectHelper.scale(deviceScissor, layer.width / layerBounds.width,
                                                   layer.height / layerBounds.height);
                deviceScissor = uiRectHelper.roundOut(deviceScissor);
                deviceScissor = uiRectHelper.intersect(deviceScissor, physicalRect);

                if (deviceScissor.isEmpty)
                {
                    ObjectPool <ReducedClip> .release(reducedClip);

                    return(false);
                }

                this._tryAddScissor(layer, deviceScissor);
            }

            var maskGenID = reducedClip.maskGenID();

            if (this._mustRenderClip(maskGenID, reducedClip.scissor.Value))
            {
                if (maskGenID == ClipStack.wideOpenGenID)
                {
                    layer.ignoreClip = true;
                }
                else
                {
                    layer.ignoreClip = false;

                    // need to inflate a bit to make sure all area is cleared.
                    var inflatedScissor = uiRectHelper.inflate(reducedClip.scissor.Value, this._fringeWidth);
                    var boundsMesh      = uiMeshMesh.create(inflatedScissor);
                    layer.draws.Add(CanvasShader.stencilClear(layer, boundsMesh));

                    foreach (var maskElement in reducedClip.maskElements)
                    {
                        layer.draws.Add(CanvasShader.stencil0(layer, maskElement.mesh.duplicate()));
                        layer.draws.Add(CanvasShader.stencil1(layer, boundsMesh.duplicate()));
                    }
                }

                this._setLastClipGenId(maskGenID, reducedClip.scissor.Value);
            }

            ObjectPool <ReducedClip> .release(reducedClip);

            return(true);
        }
示例#2
0
        bool _applyClip(Rect queryBounds)
        {
            var         layer       = this._currentLayer;
            var         layerBounds = layer.layerBounds;
            ReducedClip reducedClip = new ReducedClip(layer.clipStack, layerBounds, queryBounds);

            if (reducedClip.isEmpty())
            {
                return(false);
            }

            var scissor      = reducedClip.scissor;
            var physicalRect = Rect.fromLTRB(0, 0, layer.width, layer.height);

            if (scissor == layerBounds)
            {
                this._tryAddScissor(layer, null);
            }
            else
            {
                var deviceScissor = Rect.fromLTRB(
                    scissor.left - layerBounds.left, layerBounds.bottom - scissor.bottom,
                    scissor.right - layerBounds.left, layerBounds.bottom - scissor.top
                    ).scale(layer.width / layerBounds.width, layer.height / layerBounds.height);
                deviceScissor = deviceScissor.roundOut();
                deviceScissor = deviceScissor.intersect(physicalRect);

                if (deviceScissor.isEmpty)
                {
                    return(false);
                }

                this._tryAddScissor(layer, deviceScissor);
            }

            var maskGenID = reducedClip.maskGenID();

            if (this._mustRenderClip(maskGenID, reducedClip.scissor))
            {
                if (maskGenID == ClipStack.wideOpenGenID)
                {
                    layer.ignoreClip = true;
                }
                else
                {
                    layer.ignoreClip = false;

                    var boundsMesh = new MeshMesh(reducedClip.scissor);
                    layer.draws.Add(CanvasShader.stencilClear(layer, boundsMesh));

                    foreach (var maskElement in reducedClip.maskElements)
                    {
                        layer.draws.Add(CanvasShader.stencil0(layer, maskElement.mesh));
                        layer.draws.Add(CanvasShader.stencil1(layer, boundsMesh));
                    }
                }

                this._setLastClipGenId(maskGenID, reducedClip.scissor);
            }

            return(true);
        }