fix wrong git ignore

internal/pdf/creator/filled_curve.go

@@ -0,0 +1,107 @@
+package creator
+
+import (
+	pdfcontent "gitea.tecamino.com/paadi/pdfmerge/internal/pdf/contentstream"
+	"gitea.tecamino.com/paadi/pdfmerge/internal/pdf/contentstream/draw"
+	pdfcore "gitea.tecamino.com/paadi/pdfmerge/internal/pdf/core"
+	pdf "gitea.tecamino.com/paadi/pdfmerge/internal/pdf/model"
+)
+
+// FilledCurve represents a closed path of Bezier curves with a border and fill.
+type FilledCurve struct {
+	curves        []draw.CubicBezierCurve
+	FillEnabled   bool // Show fill?
+	fillColor     *pdf.PdfColorDeviceRGB
+	BorderEnabled bool // Show border?
+	BorderWidth   float64
+	borderColor   *pdf.PdfColorDeviceRGB
+}
+
+// NewFilledCurve returns a instance of filled curve.
+func NewFilledCurve() *FilledCurve {
+	curve := FilledCurve{}
+	curve.curves = []draw.CubicBezierCurve{}
+	return &curve
+}
+
+// AppendCurve appends a Bezier curve to the filled curve.
+func (fc *FilledCurve) AppendCurve(curve draw.CubicBezierCurve) *FilledCurve {
+	fc.curves = append(fc.curves, curve)
+	return fc
+}
+
+// SetFillColor sets the fill color for the path.
+func (fc *FilledCurve) SetFillColor(color Color) {
+	fc.fillColor = pdf.NewPdfColorDeviceRGB(color.ToRGB())
+}
+
+// SetBorderColor sets the border color for the path.
+func (fc *FilledCurve) SetBorderColor(color Color) {
+	fc.borderColor = pdf.NewPdfColorDeviceRGB(color.ToRGB())
+}
+
+// draw draws the filled curve. Can specify a graphics state (gsName) for setting opacity etc. Otherwise leave empty ("").
+// Returns the content stream as a byte array, the bounding box and an error on failure.
+func (fc *FilledCurve) draw(gsName string) ([]byte, *pdf.PdfRectangle, error) {
+	bpath := draw.NewCubicBezierPath()
+	for _, c := range fc.curves {
+		bpath = bpath.AppendCurve(c)
+	}
+
+	creator := pdfcontent.NewContentCreator()
+	creator.Add_q()
+
+	if fc.FillEnabled {
+		creator.Add_rg(fc.fillColor.R(), fc.fillColor.G(), fc.fillColor.B())
+	}
+	if fc.BorderEnabled {
+		creator.Add_RG(fc.borderColor.R(), fc.borderColor.G(), fc.borderColor.B())
+		creator.Add_w(fc.BorderWidth)
+	}
+	if len(gsName) > 1 {
+		// If a graphics state is provided, use it. (can support transparency).
+		creator.Add_gs(pdfcore.PdfObjectName(gsName))
+	}
+
+	draw.DrawBezierPathWithCreator(bpath, creator)
+	creator.Add_h() // Close the path.
+
+	if fc.FillEnabled && fc.BorderEnabled {
+		creator.Add_B() // fill and stroke.
+	} else if fc.FillEnabled {
+		creator.Add_f() // Fill.
+	} else if fc.BorderEnabled {
+		creator.Add_S() // Stroke.
+	}
+	creator.Add_Q()
+
+	// Get bounding box.
+	pathBbox := bpath.GetBoundingBox()
+	if fc.BorderEnabled {
+		// Account for stroke width.
+		pathBbox.Height += fc.BorderWidth
+		pathBbox.Width += fc.BorderWidth
+		pathBbox.X -= fc.BorderWidth / 2
+		pathBbox.Y -= fc.BorderWidth / 2
+	}
+
+	// Bounding box - global coordinate system.
+	bbox := &pdf.PdfRectangle{}
+	bbox.Llx = pathBbox.X
+	bbox.Lly = pathBbox.Y
+	bbox.Urx = pathBbox.X + pathBbox.Width
+	bbox.Ury = pathBbox.Y + pathBbox.Height
+	return creator.Bytes(), bbox, nil
+}
+
+// GeneratePageBlocks draws the filled curve on page blocks.
+func (fc *FilledCurve) GeneratePageBlocks(ctx DrawContext) ([]*Block, DrawContext, error) {
+	block := NewBlock(ctx.PageWidth, ctx.PageHeight)
+
+	contents, _, _ := fc.draw("")
+	err := block.addContentsByString(string(contents))
+	if err != nil {
+		return nil, ctx, err
+	}
+	return []*Block{block}, ctx, nil
+}