feat(文件拆分): 拆分PDF格式适配模块

internal/codec/pdf/threed_mode.go

@@ -0,0 +1,77 @@
+// Copyright 2025-2026 肖其顿 (XIAO QI DUN)
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package pdf
+
+import (
+	basethreed "github.com/xiaoqidun/ofdgo/internal/base/threed"
+	"github.com/xiaoqidun/pdfgo"
+)
+
+// threeDRenderMode 将PDF标准绘制模式映射到通用几何绘制参数
+// 入参: source 三维参数, options 绘制选项
+// 返回: error 未支持的模式错误
+func threeDRenderMode(source pdfgo.ThreeD, options *basethreed.U3DRenderOptions) error {
+	mode := source.Presentation.RenderMode
+	if mode == nil {
+		return nil
+	}
+	switch mode.Subtype {
+	case "Solid":
+	case "Transparent":
+		options.Opacity = &mode.Opacity
+	case "SolidWireframe", "TransparentWireframe":
+		options.Mode, options.AuxiliaryColor = basethreed.U3DRenderSolidWireframe, &mode.AuxiliaryColor
+		if mode.Subtype == "TransparentWireframe" {
+			options.Opacity = &mode.Opacity
+		}
+	case "Wireframe":
+		options.Mode, options.AuxiliaryColor = basethreed.U3DRenderWireframe, &mode.AuxiliaryColor
+	case "ShadedWireframe":
+		options.Mode = basethreed.U3DRenderShadedWireframe
+	case "HiddenWireframe":
+		options.Mode, options.AuxiliaryColor = basethreed.U3DRenderHiddenWireframe, &mode.AuxiliaryColor
+	case "Vertices":
+		options.Mode, options.AuxiliaryColor = basethreed.U3DRenderVertices, &mode.AuxiliaryColor
+	case "ShadedVertices":
+		options.Mode = basethreed.U3DRenderShadedVertices
+	case "BoundingBox":
+		options.Mode, options.AuxiliaryColor = basethreed.U3DRenderBoundingBox, &mode.AuxiliaryColor
+	case "TransparentBoundingBox", "TransparentBoundingBoxOutline":
+		options.Mode = basethreed.U3DRenderBoundingBoxFaces
+		options.FaceColor, options.Opacity = mode.FaceColor, &mode.Opacity
+		if mode.Subtype == "TransparentBoundingBoxOutline" {
+			options.Mode, options.AuxiliaryColor = basethreed.U3DRenderBoundingBoxOutline, &mode.AuxiliaryColor
+		}
+	case "Illustration":
+		options.Mode = basethreed.U3DRenderIllustration
+		options.AuxiliaryColor, options.FaceColor, options.CreaseAngle = &mode.AuxiliaryColor, mode.FaceColor, &mode.CreaseAngle
+	case "SolidOutline", "ShadedIllustration":
+		options.Mode = basethreed.U3DRenderSolidOutline
+		if mode.Subtype == "ShadedIllustration" {
+			options.Mode = basethreed.U3DRenderShadedIllustration
+		}
+		options.AuxiliaryColor, options.CreaseAngle = &mode.AuxiliaryColor, &mode.CreaseAngle
+	default:
+		return &pdfgo.UnsupportedError{Feature: "3D render mode " + string(mode.Subtype)}
+	}
+	if mode.AnnotationBackground && (mode.Subtype == "Illustration" || mode.Subtype == "TransparentBoundingBox" || mode.Subtype == "TransparentBoundingBoxOutline") {
+		options.FaceColor = source.AnnotationBackground
+		if source.AnnotationBackground == nil {
+			zero := 0.0
+			options.Opacity = &zero
+		}
+	}
+	return nil
+}