// 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 ofdgo

import (
	"context"
	"crypto/sha256"
	"encoding/binary"
	"fmt"
	"image/color"
	"math"
	"reflect"
	"strconv"

	basegeom "github.com/xiaoqidun/ofdgo/internal/base/geom"
	codecpdf "github.com/xiaoqidun/ofdgo/internal/codec/pdf"
	"github.com/xiaoqidun/pdfgo"
)

// pdfPointBounds 逐点汇总边界，不保留文字或路径的临时坐标数组
type pdfPointBounds struct {
	minX, minY, maxX, maxY float64
	found                  bool
}

// pdfClipPath 保存导入器只读的裁剪几何，不缓存对象位移或文字裁剪
type pdfClipPath struct {
	box  Box
	data string
	path *[1]PathObject
}

// pdfGeometryPath 转换PDF路径并衔接OFD几何类型
// 入参: ctx 取消上下文, source PDF路径, matrix 坐标变换
// 返回: GeometryPath 独立几何路径, error 指令、坐标或取消错误
func pdfGeometryPath(ctx context.Context, source pdfgo.Path, matrix pdfgo.Matrix) (GeometryPath, error) {
	path, err := codecpdf.GeometryPath(ctx, source, matrix)
	return GeometryPath(path), err
}

// compileCoverage 直接编译无文字裁剪的填充覆盖，其他语义交给配置的页面编译器
// 入参: node 图元, stroke 是否描边
// 返回: *RasterPage 覆盖场景, Box 页面区域, error 编译错误
func (p *pdfImporter) compileCoverage(node pdfCompositeNode, stroke bool) (*RasterPage, Box, error) {
	if node.path != nil && pdfPaintedPathEmpty(node.path.Path) {
		return nil, Box{}, p.emptyPaintedPath()
	}
	fallback := func() (*RasterPage, Box, error) {
		return p.compileGroup(func(local *pdfImporter) error { return node.coverage(local, stroke) })
	}
	if stroke || node.path == nil && node.image == nil {
		return fallback()
	}
	deferredClip := false
	switch p.editor.Backends().Compiler.(type) {
	case CanvasBackend, *CanvasBackend:
	case OFDCompiler, *OFDCompiler:
		deferredClip = true
	default:
		return fallback()
	}
	style, _, _ := node.style()
	for _, clip := range style.Clips {
		if len(clip.Text) != 0 {
			return fallback()
		}
	}
	geometry, err := p.renderer.Geometry()
	if err != nil {
		return nil, Box{}, err
	}
	switch geometry.(type) {
	case CanvasBackend, *CanvasBackend:
	default:
		return fallback()
	}
	var path GeometryPath
	evenOdd := false
	if node.path != nil {
		path, err = pdfGeometryPath(p.ctx, node.path.Path, p.matrix)
		evenOdd = node.path.Path.EvenOdd
	} else {
		path, err = geometry.Transform(GeometryPath(basegeom.Rectangle(Box{W: 1, H: 1})), MatrixFromValues([6]float64(p.matrix.Mul(node.image.Matrix))))
	}
	if err != nil {
		return nil, Box{}, err
	}
	if len(path) == 0 {
		return nil, Box{}, p.emptyPaintedPath()
	}
	path = GeometryPath(basegeom.Close(basegeom.Path(path)))
	clip, err := p.coverageClip(style.Clips, geometry)
	if err != nil || len(clip) == 0 {
		return nil, Box{}, err
	}
	compiler := semanticCompiler{geometry: geometry, page: &RasterPage{Width: p.pageWidth, Height: p.pageHeight, DPI: p.rasterDPI}}
	var bounds pdfPointBounds
	for _, segment := range path {
		if segment.Verb != GeometryClose {
			bounds.add(pdfgo.Point{X: segment.End.X, Y: segment.End.Y})
		}
		if segment.Verb == GeometryCubic {
			bounds.add(pdfgo.Point{X: segment.Control1.X, Y: segment.Control1.Y})
			bounds.add(pdfgo.Point{X: segment.Control2.X, Y: segment.Control2.Y})
		}
	}
	boundary := GeometryPath(basegeom.Rectangle(bounds.box()))
	clip, err = clipGeometry(geometry, clip, &boundary)
	if err != nil {
		return nil, Box{}, err
	}
	if deferredClip {
		if err := compiler.command(path, Paint{Color: color.RGBA{255, 255, 255, 255}}, evenOdd, &clip, IdentityMatrix, nil); err != nil {
			return nil, Box{}, err
		}
		return p.groupSceneBounds(compiler.page)
	}
	box, err := geometry.Bounds(path)
	if err != nil {
		return nil, Box{}, err
	}
	rect, rectangle := basegeom.RectangleBounds(basegeom.Path(clip))
	if !rectangle || box.X < rect.X || box.Y < rect.Y || box.X+box.W > rect.X+rect.W || box.Y+box.H > rect.Y+rect.H {
		if evenOdd {
			path, err = geometry.Normalize(path, true)
			if err != nil {
				return nil, Box{}, err
			}
			evenOdd = false
		}
		var clipped GeometryPath
		var linear bool
		var clipErr error
		if rectangle {
			clipped, linear, clipErr = clipLinearFillGeometry(path, clip)
		}
		if clipErr != nil {
			return nil, Box{}, clipErr
		}
		if linear {
			path = clipped
		} else {
			path, err = clipGeometry(geometry, path, &clip)
			if err != nil {
				return nil, Box{}, err
			}
		}
	}
	if err := compiler.command(path, Paint{Color: color.RGBA{255, 255, 255, 255}}, evenOdd, nil, IdentityMatrix, nil); err != nil {
		return nil, Box{}, err
	}
	return p.groupSceneBounds(compiler.page)
}

// coverageClip 按完整路径、变换和页面范围复用只读裁剪，不缓存失败结果
// 入参: paths 无文字裁剪的路径集合, geometry 几何后端
// 返回: GeometryPath 共享只读轮廓, error 几何或取消错误
func (p *pdfImporter) coverageClip(paths []pdfgo.Path, geometry GeometryBackend) (GeometryPath, error) {
	if err := p.ctx.Err(); err != nil {
		return nil, err
	}
	clip := GeometryPath(basegeom.Rectangle(Box{W: p.pageWidth, H: p.pageHeight}))
	if len(paths) == 0 {
		return clip, nil
	}
	hash := sha256.New()
	var size [16]byte
	binary.LittleEndian.PutUint64(size[:8], math.Float64bits(p.pageWidth))
	binary.LittleEndian.PutUint64(size[8:], math.Float64bits(p.pageHeight))
	hash.Write(size[:])
	for _, path := range paths {
		key, err := codecpdf.ClipPathKey(p.ctx, path, p.matrix)
		if err != nil {
			return nil, err
		}
		hash.Write(key[:])
	}
	var key [32]byte
	hash.Sum(key[:0])
	cache := p.compositingCache().clipCache()
	if cached, ok := cache.get(key); ok {
		return cached, nil
	}
	for _, source := range paths {
		part, err := pdfGeometryPath(p.ctx, source, p.matrix)
		if err != nil {
			return nil, err
		}
		part = GeometryPath(basegeom.Close(basegeom.Path(part)))
		if _, rectangle := basegeom.RectangleBounds(basegeom.Path(part)); source.EvenOdd && !rectangle {
			part, err = geometry.Normalize(part, true)
			if err != nil {
				return nil, err
			}
		}
		clip, err = clipGeometry(geometry, part, &clip)
		if err != nil {
			return nil, err
		}
		if len(clip) == 0 {
			break
		}
	}
	if err := p.ctx.Err(); err != nil {
		return nil, err
	}
	if len(clip) <= (cache.limit-128)/112 {
		cache.put(key, clip, 128+len(clip)*112)
	}
	return clip, nil
}

// pdfGlyphPath 将OFD字形几何交给PDF路径适配器转换
// 入参: outline 字形轮廓, matrix 字形到页面的变换
// 返回: pdfgo.Path 页面路径, error 非字体轮廓指令
func pdfGlyphPath(outline GeometryPath, matrix pdfgo.Matrix) (pdfgo.Path, error) {
	return codecpdf.GlyphPath(basegeom.Path(outline), matrix)
}

// pdfNumbers 按OFD数值格式序列化坐标
// 入参: values 数值列表
// 返回: string 空格分隔的数值
func pdfNumbers(values ...float64) string {
	var buffer [128]byte
	data := buffer[:0]
	for n, v := range values {
		if n != 0 {
			data = append(data, ' ')
		}
		data = strconv.AppendFloat(data, v, 'g', -1, 64)
	}
	return string(data)
}

// pdfDashPattern 换算PDF虚线长度，将单值数组展开为等长线段与间隔
// 入参: dash PDF虚线数组, scale 坐标缩放比例
// 返回: string OFD虚线数组
func pdfDashPattern(dash []float64, scale float64) string {
	if len(dash) == 0 {
		return ""
	}
	values := make([]float64, max(2, len(dash)))
	for i, value := range dash {
		values[i] = value * scale
	}
	if len(dash) == 1 {
		values[1] = values[0]
	}
	return pdfNumbers(values...)
}

// pdfBoundary 序列化对象边界
// 入参: b 对象边界
// 返回: string OFD边界数据
func pdfBoundary(b Box) string { return pdfNumbers(b.X, b.Y, b.W, b.H) }

// pdfBounds 计算点集合的包围框
// 入参: points 坐标点集合
// 返回: Box 包围框
func pdfBounds(points []pdfgo.Point) Box {
	var bounds pdfPointBounds
	for _, point := range points {
		bounds.add(point)
	}
	return bounds.box()
}

// add 按原顺序累计一个控制点的最小和最大坐标
// 入参: point 坐标点
func (b *pdfPointBounds) add(point pdfgo.Point) {
	if !b.found {
		b.minX, b.minY, b.maxX, b.maxY = point.X, point.Y, point.X, point.Y
		b.found = true
	}
	b.minX, b.minY = math.Min(b.minX, point.X), math.Min(b.minY, point.Y)
	b.maxX, b.maxY = math.Max(b.maxX, point.X), math.Max(b.maxY, point.Y)
}

// box 取得原精度边界，空集合仍返回零值
// 返回: Box 坐标范围
func (b *pdfPointBounds) box() Box {
	if !b.found {
		return Box{}
	}
	return Box{X: b.minX, Y: b.minY, W: math.Max(b.maxX-b.minX, 1e-6), H: math.Max(b.maxY-b.minY, 1e-6)}
}

// path 保留每次路径绘制操作，重叠描边不合并为单次绘制
// 入参: mark PDF路径绘制信息
// 返回: error 错误信息
func (p *pdfImporter) path(mark pdfgo.PathMark) error {
	if err := p.ctx.Err(); err != nil {
		return err
	}
	if pdfPaintedPathEmpty(mark.Path) {
		return p.emptyPaintedPath()
	}
	if mark.Style.BlendMode != "" && mark.Style.BlendMode != "Normal" && mark.Style.BlendMode != "Compatible" {
		return &pdfgo.UnsupportedError{Feature: "path blend mode " + string(mark.Style.BlendMode)}
	}
	return p.appendPath(mark)
}

// appendPath 添加独立可编辑路径
// 入参: mark PDF路径绘制信息
// 返回: error 错误信息
func (p *pdfImporter) appendPath(mark pdfgo.PathMark) error {
	if pdfPaintedPathEmpty(mark.Path) {
		return p.emptyPaintedPath()
	}
	var err error
	mark.Style, err = p.maskStyle(mark.Style)
	if err != nil {
		if p.rasterMaskAllowed(err) {
			mask := mark.Style.SoftMask
			mark.Style.SoftMask = nil
			return p.rasterGroup(pdfgo.GroupMark{Alpha: 1, SoftMask: mask}, func(v pdfgo.Visitor) error { return v.Path(mark) })
		}
		return err
	}
	if mark.Fill && mark.Style.FillOverprint && codecpdf.OverprintNeedsSeparation(mark.Style.Fill) || mark.Stroke && mark.Style.StrokeOverprint && codecpdf.OverprintNeedsSeparation(mark.Style.Stroke) {
		return &pdfgo.UnsupportedError{Feature: "color separation overprint"}
	}
	if p.warning != nil && (mark.Fill && p.gradientError(mark.Style.Fill) != nil || mark.Stroke && p.gradientError(mark.Style.Stroke) != nil) {
		if err := p.ctx.Err(); err != nil {
			return err
		}
		return p.gradientPath(mark)
	}
	box, err := codecpdf.PathBounds(p.ctx, mark.Path, p.matrix)
	if err != nil {
		return err
	}
	scale := math.Hypot(p.matrix[0], p.matrix[1])
	drawing, origin, ctm := *p, box, ""
	marginScale := scale
	if mark.StrokeMatrix != (pdfgo.Matrix{}) {
		inverse, ok := mark.StrokeMatrix.Inverse()
		if !ok {
			return fmt.Errorf("invalid PDF stroke matrix")
		}
		drawing.matrix, origin, scale = inverse, Box{}, 1
		m := p.matrix.Mul(mark.StrokeMatrix)
		marginScale = math.Max(math.Hypot(m[0], m[2]), math.Hypot(m[1], m[3]))
	}
	if mark.Stroke {
		margin := mark.Style.LineWidth * marginScale / 2 * math.Max(1, mark.Style.MiterLimit)
		box = Box{X: box.X - margin, Y: box.Y - margin, W: box.W + 2*margin, H: box.H + 2*margin}
	}
	if mark.StrokeMatrix == (pdfgo.Matrix{}) {
		origin = box
	} else {
		m := p.matrix.Mul(mark.StrokeMatrix)
		m[4], m[5] = m[4]-box.X, m[5]-box.Y
		ctm = pdfNumbers(m[:]...)
	}
	paint := func(value pdfgo.Paint) (*FillColor, error) {
		if value.Tiling == nil && value.Axial == nil && value.Radial == nil && value.Mesh == nil && value.Function == nil && value.Shading == nil {
			return p.color(value, mark.Style.RenderingIntent)
		}
		if value.Tiling != nil || pdfGradientPattern(value) {
			return p.paintColor(value, box, mark.Style.RenderingIntent)
		}
		return drawing.paintColor(value, origin, mark.Style.RenderingIntent)
	}
	fillColor, err := p.color(mark.Style.Fill, mark.Style.RenderingIntent)
	if err != nil {
		return err
	}
	strokePaint, err := p.color(mark.Style.Stroke, mark.Style.RenderingIntent)
	if err != nil {
		return err
	}
	if mark.Fill {
		fillColor, err = paint(mark.Style.Fill)
		if err != nil {
			return err
		}
	}
	if mark.Stroke {
		strokePaint, err = paint(mark.Style.Stroke)
		if err != nil {
			return err
		}
	}
	strokeColor := StrokeColor(*strokePaint)
	clips, err := p.clips(mark.Style.Clips, box)
	if err != nil {
		return err
	}
	data, err := codecpdf.PathData(p.ctx, mark.Path, drawing.matrix, origin)
	if err != nil {
		return err
	}
	object := PathObject{Boundary: pdfBoundary(box), CTM: ctm, AbbreviatedData: data, Fill: &mark.Fill, Stroke: &mark.Stroke, FillColor: fillColor, StrokeColor: &strokeColor, LineWidth: mark.Style.LineWidth * scale, Cap: []string{"Butt", "Round", "Square"}[mark.Style.Cap], Join: []string{"Miter", "Round", "Bevel"}[mark.Style.Join], MiterLimit: mark.Style.MiterLimit, Clips: clips}
	object.LineWidthSet = object.LineWidth == 0
	if mark.Path.EvenOdd {
		object.Rule = "Even-Odd"
	}
	if len(mark.Style.Dash) > 0 {
		object.DashPattern = pdfDashPattern(mark.Style.Dash, scale)
		phase := mark.Style.DashPhase * scale
		object.DashOffset = &phase
	}
	p.appendSequenceObject(GraphicObject{Type: "PathObject", PathObject: object}, mark.Sequence)
	p.report.PathObjects++
	return nil
}

// pdfPaintedPathEmpty 判断无坐标路径，不排除具有坐标的退化描边
// 入参: path PDF路径
// 返回: bool 是否没有坐标
func pdfPaintedPathEmpty(path pdfgo.Path) bool {
	for _, segment := range path.Segments {
		if segment.Operator != "C" || len(segment.Points) != 0 {
			return false
		}
	}
	return true
}

// emptyPaintedPath 按诊断策略忽略不绘制内容的空路径，严格模式仍拒绝
// 返回: error 严格模式或取消错误
func (p *pdfImporter) emptyPaintedPath() error {
	if err := p.ctx.Err(); err != nil {
		return err
	}
	if p.warning == nil {
		return fmt.Errorf("empty PDF painted path")
	}
	p.warning(pdfgo.Diagnostic{Message: "empty PDF painted path ignored"})
	return p.ctx.Err()
}

// clipPath 复用页面内重复路径编码，按估算字节预算淘汰且不缓存错误
// 入参: path 裁剪路径
// 返回: pdfClipPath 变换后的边界及编码, error 取消错误
func (p *pdfImporter) clipPath(path pdfgo.Path) (pdfClipPath, error) {
	key, err := codecpdf.ClipPathKey(p.ctx, path, p.matrix)
	if err != nil {
		return pdfClipPath{}, err
	}
	if p.clipPaths == nil {
		p.clipPaths = resourceCache[[32]byte, pdfClipPath](p.resources, 8<<20)
	}
	if cached, ok := p.clipPaths.get(key); ok {
		return cached, nil
	}
	box, err := codecpdf.PathBounds(p.ctx, path, p.matrix)
	if err != nil {
		return pdfClipPath{}, err
	}
	data, err := codecpdf.PathData(p.ctx, path, p.matrix, box)
	if err != nil {
		return pdfClipPath{}, err
	}
	rule := "NonZero"
	if path.EvenOdd {
		rule = "Even-Odd"
	}
	boundary := pdfBoundary(box)
	fill, stroke := true, false
	result := pdfClipPath{box: box, data: data, path: &[1]PathObject{{Boundary: boundary, AbbreviatedData: data, Rule: rule, Fill: &fill, Stroke: &stroke}}}
	p.clipPaths.put(key, result, len(data)+len(boundary)+512)
	return result, nil
}

// sharedClipObjects 将连续重复的大裁剪区提取为复合对象，同步缓冲区及来源区段
// 入参: objects 本库生成且尚未分配标识的对象
// 返回: []GraphicObject 提取后的对象, error 资源创建或取消错误
func (p *pdfImporter) sharedClipObjects(objects []GraphicObject) ([]GraphicObject, error) {
	var output []GraphicObject
	var mapped pdfObjectBuffer
	for start := 0; start < len(objects); {
		if err := p.ctx.Err(); err != nil {
			return nil, err
		}
		clips := pdfPageClip(objects[start])
		end := start + 1
		if clips != nil {
			for end < len(objects) && p.objects.origin(start).equal(p.objects.origin(end)) && pdfMatchesPageClip(objects[end], clips) {
				if err := p.ctx.Err(); err != nil {
					return nil, err
				}
				end++
			}
		}
		if end-start < 2 {
			if output != nil {
				mapped.recordOrigin(len(output), p.objects.origin(start))
				output = append(output, objects[start])
			}
			start = end
			continue
		}
		if output == nil {
			output = append(make([]GraphicObject, 0, len(objects)), objects[:start]...)
			if p.objects != nil {
				for _, run := range p.objects.sequences {
					if run.start >= start {
						break
					}
					mapped.sequences = append(mapped.sequences, run)
				}
			}
		}
		members := objects[start:end:end]
		for index := range members {
			*editorObjectClips(&members[index]) = nil
		}
		id, err := p.objectValidation().addOwnedVector(p.ctx, members, p.pageWidth, p.pageHeight)
		if err != nil {
			return nil, err
		}
		mapped.recordOrigin(len(output), p.objects.origin(start))
		output = append(output, GraphicObject{Type: "CompositeObject", CompositeGraphicUnit: CompositeGraphicUnit{
			Boundary: pdfBoundary(Box{W: p.pageWidth, H: p.pageHeight}), ResourceID: id, Clips: clips,
		}})
		start = end
	}
	if output == nil {
		return objects, nil
	}
	if p.objects != nil {
		mapped.parts = [][]GraphicObject{output}
		mapped.size = len(output)
		*p.objects = mapped
	}
	return output, nil
}

// pdfPageClip 将导入裁剪区还原到页面坐标，仅提取包含大量重复路径数据的裁剪
// 入参: object 导入对象
// 返回: *Clips 页面坐标裁剪，不满足提取条件时为空
func pdfPageClip(object GraphicObject) *Clips {
	if object.Type != "TextObject" && object.Type != "PathObject" && object.Type != "ImageObject" {
		return nil
	}
	clips := *editorObjectClips(&object)
	if clips == nil || clips.usesObjectMatrix() || len(clips.Clip) == 0 {
		return nil
	}
	boundary, _ := editorGeometry(object)
	box, err := ParseBox(boundary)
	if err != nil {
		return nil
	}
	translation := ""
	if box.X != 0 || box.Y != 0 {
		translation = pdfNumbers(1, 0, 0, 1, -box.X, -box.Y)
	}
	bytes := 0
	result := &Clips{Clip: make([]Clip, len(clips.Clip))}
	for index, clip := range clips.Clip {
		if len(clip.Area) != 1 || clip.Area[0].CTM != translation {
			return nil
		}
		area := clip.Area[0]
		area.CTM = ""
		result.Clip[index].Area = []ClipArea{area}
		for _, path := range area.Path {
			bytes += len(path.AbbreviatedData)
		}
	}
	if bytes < 2048 {
		return nil
	}
	return result
}

// pdfMatchesPageClip 比较页面坐标裁剪，不将相同外接矩形视为相同路径
// 入参: object 导入对象, pageClip 已还原的裁剪区
// 返回: bool 是否可共享裁剪区
func pdfMatchesPageClip(object GraphicObject, pageClip *Clips) bool {
	if object.Type != "TextObject" && object.Type != "PathObject" && object.Type != "ImageObject" {
		return false
	}
	clips := *editorObjectClips(&object)
	if clips == nil || clips.usesObjectMatrix() || len(clips.Clip) != len(pageClip.Clip) {
		return false
	}
	boundary, _ := editorGeometry(object)
	box, err := ParseBox(boundary)
	if err != nil {
		return false
	}
	translation := ""
	if box.X != 0 || box.Y != 0 {
		translation = pdfNumbers(1, 0, 0, 1, -box.X, -box.Y)
	}
	for index, clip := range clips.Clip {
		if len(clip.Area) != 1 || clip.Area[0].CTM != translation {
			return false
		}
		area, expected := clip.Area[0], pageClip.Clip[index].Area[0]
		if area.DrawParam != expected.DrawParam || !reflect.DeepEqual(area.Path, expected.Path) || !reflect.DeepEqual(area.Text, expected.Text) {
			return false
		}
	}
	return true
}

// clips 省略覆盖对象边界的矩形裁剪，复用其余几何并保留位移及路径交集
// 入参: paths 裁剪路径, origin 对象边界
// 返回: *Clips OFD裁剪区域，无裁剪时为空, error 未解析的裁剪字形
func (p *pdfImporter) clips(paths []pdfgo.Path, origin Box) (*Clips, error) {
	if len(paths) == 0 {
		return nil, nil
	}
	var clips *Clips
	var areas []ClipArea
	translation := ""
	for _, path := range paths {
		if err := p.ctx.Err(); err != nil {
			return nil, err
		}
		if codecpdf.ClipContainsBoundary(path, p.matrix, origin) {
			continue
		}
		if clips == nil {
			clips = &Clips{Clip: make([]Clip, 0, len(paths))}
			areas = make([]ClipArea, len(paths))
			if origin.X != 0 || origin.Y != 0 {
				translation = pdfNumbers(1, 0, 0, 1, -origin.X, -origin.Y)
			}
		}
		index := len(clips.Clip)
		area := &areas[index]
		area.CTM = translation
		if len(path.Segments) != 0 {
			encoded, err := p.clipPath(path)
			if err != nil {
				return nil, err
			}
			area.Path = encoded.path[:1:1]
		}
		for _, mark := range path.Text {
			objects, ok := p.clipTexts[mark]
			if !ok {
				count := p.objects.len()
				textCount := p.report.TextObjects
				if err := p.text(pdfgo.TextMark{Font: mark.Font, Glyphs: mark.Glyphs, Positions: mark.Positions, Matrix: mark.Matrix, Size: mark.Size, HorizontalScale: mark.HorizontalScale, Mode: 7, Clip: mark, Style: pdfgo.Style{Fill: pdfgo.Paint{Alpha: 1}}}); err != nil {
					return nil, err
				}
				p.objects.truncate(count)
				p.report.TextObjects = textCount
				objects = p.clipTexts[mark]
			}
			if len(path.Text) == 1 {
				area.Text = objects[:len(objects):len(objects)]
			} else {
				area.Text = append(area.Text, objects...)
			}
		}
		if len(area.Path)+len(area.Text) == 0 {
			fill, stroke := true, false
			area.Path = []PathObject{{Boundary: "0 0 1 1", AbbreviatedData: "M 0 0 C", Fill: &fill, Stroke: &stroke}}
		}
		clips.Clip = append(clips.Clip, Clip{Area: areas[index : index+1 : index+1]})
	}
	return clips, nil
}