注釈の外観辞書で、透明度を設定できない

ページの方のRESOURCES辞書に入ってしまうので、注釈のコンテンツからは参照できない模様。

注釈のRESOURCES辞書に入れないといけないが、、、そんな方法は用意されていないみたいで、自分で辞書を作って、コンテンツを作文して対応しました。

参考コード、例：

 var a = PdfAnnotation.CreateSquareCircle(wr1, pi.GetPDFRect(tx.Bounds), "", true);

 a.Put(PdfName.IC, pi.GetPdfArray(tx.Fore));//interior color
 a.Flags = PdfAnnotation.FLAGS_PRINT;
 {
  PdfDictionary objAP = new PdfDictionary();
  {
   PdfContentByte wr = new PdfContentByte(wr1);
   var bcFore = pi.GetBaseColor(tx.Fore);
   bcFore = new BaseColor(bcFore.R, bcFore.G, bcFore.B, (int)(255 * 0.3));

   var rc1 = pi.GetPDFRect(tx.Bounds);

   //PdfGState gs1 = new PdfGState();
   //gs1.FillOpacity = 0.3f;

   wr.SaveState();
   //wr.SetGState(gs1);
   wr.InternalBuffer.Append(" /GS1 gs ");
   wr.SetColorFill(bcFore);
   wr.SetLineWidth(0);
   wr.Rectangle(rc1.Left, rc1.Bottom, rc1.Width, rc1.Height);
   wr.Fill();
   wr.RestoreState();

   var bbox = pi.GetPDFRect(tx.Bounds);
   PdfStream objN = new PdfStream(wr.ToPdf(wr.PdfWriter));
   wr.Reset();
   objN.Put(PdfName.TYPE, PdfName.XOBJECT);
   objN.Put(PdfName.SUBTYPE, PdfName.FORM);
   objN.Put(PdfName.FORMTYPE, new PdfNumber(1));
   objN.Put(PdfName.BBOX, new PdfArray(new float[] { bbox.Left, bbox.Bottom, bbox.Right, bbox.Top }));
   {
    PdfDictionary objRes = new PdfDictionary();
    {
     PdfArray objProcSet = new PdfArray();
     {
      objProcSet.Add(PdfName.PDF);
     }
     objRes.Put(PdfName.PROCSET, objProcSet);
    }
    {
     PdfDictionary objExtGState = new PdfDictionary();
     {
      PdfDictionary objGS1 = new PdfDictionary();
      objGS1.Put(PdfName.ca, new PdfNumber(0.3f));

      objExtGState.Put(new PdfName("GS1"), objGS1);
     }
     objRes.Put(PdfName.EXTGSTATE, objExtGState);
    }
    objN.Put(PdfName.RESOURCES, objRes);
   }
   objAP.Put(PdfName.N, wr1.AddToBody(objN).IndirectReference);

  }
  a.Flags = PdfAnnotation.FLAGS_PRINT;
  a.Put(PdfName.AP, objAP);
  a.Put(PdfName.CA, new PdfNumber(0.3f));
 }
 wr1.AddAnnotation(a);

FreeTextCalloutのRD

PDF注釈の「引き出し線ツール」

回転ができます。これがややこしい。。。

RDは、回転した後の矩形で指定します。

[   ←  ↓   →   ↑   ]

+-----------------+
|        | 4      |
|        V        |
|   +---------+ 3 |
|-->|         |<--|
| 1 +---------+   |
|        A        |
|      2 |        |
+-----------------+

[ 1 2 3 4 ] の順で、DeflateRectする量を指定。

アノーテーションの例：

iTextSharp.text.Rectangle 座標系

左下が原点
右が+x
上が+y

new iTextSharp.text.Rectangle(llx, lly, urx, ury);

new iTextSharp.text.Rectangle(左下x, 左下y, 右上x, 右上y);

+y

A
|
|     +------------B
|     |            |
|     |            |
|     |            |
|     A------------+
|
0-------------------------> +x

A = (llx, lly)  B = (urx, ury)


(lower left X, lower left Y) - (upper right X, upper right Y)


単位はポイント pt です。1pt ≒ 0.352777mm  参考

A4 の場合、約 595x842 pt ⇔ 210x297 mm

寸法・座標系の件

↓A3横(Windowsビットマップ)

(0, 0)
+--------------+ → +x
|              |
| A3 Landscape |
|              |
+--------------+ (3309, 2339)
↓ +y

↓A3横(PDF)

(0, 842.357361)

↑ +y
+--------------+ (1191.68909, 842.357361)
|              |
| A3 Landscape |
|              |
+--------------+ → +x (1191.68909, 0)
(0, 0)

rectangle について
[ llx lly urx ury ]
[ lower-left x, lower-left y, upper-right x, upper-right-y ]
[ left bottom right top ]

Graphics operators

PDF32000_2008.pdf より、一部抜き取り。

General graphics state
w	Set the line width
J	Set the line cap style
j	Set the line join style
M	Set the miter limit
d	Set the line dash pattern (dashArray dashPhase)
ri	Set the colur rendering intent
i	Set the flatness tolerance
gs	Set the specified parameters (dictName)
gs Graphics state parameter dictionary
LW	The line width
LC	The line cap style
LJ	The line joint style
ML	The miter limit
D	The line dash pattern
RI	The name of the rendering intent.
OP	whether to apply overprint; both or only stroking
op	whether to apply overprint for painting operations
OPM	The overprint mode
Font	An array of the form [font size]
BG	The black-generation function
BG2	Same as BG, function or name
UCR	The undercolor-removal function
UCR2	Same as UCR, function or name
TR	The transfer function
TR2	Same as TR, function, array, or name
HT	The halftone dictionary or stream
FL	The flatness tolerance
SM	The smoothness tolerance
SA	apply automatic stroke adjustment
BM	The current blend mode
SMask	The current soft mask
CA	The current stroking alpha constant
ca	Same as CA; non-stroking operationg
AIS	The alpha source flag
TK	The text knockout flag
Special graphics state
q	Save the current graphics state
Q	Restore the graphics state
cm	Modify the current transformation matrix (CTM) by concatenating the specified matrix (a b c d e f)
Path construction
m	Begin a new subpath (x y)
l	Append a straight line segment (x y)
c	Append a cubic Bezier curve (x1 y1 x2 y2 x3 y3)
v	Append a cubic Bezier curve (x2 y2 x3 y3)
y	Append a cubic Bezier curve (x1 y1 x3 y3)
h	Close the current subpath
re	Append a rectangle (x y width height)
Path painting
S	Stroke the path
s	Close and stroke the path
f	Fill the path
F	Equivalent to f; compatibility
f*	Fill the path
B	Fill and then stroke the path; winding
B*	Fill and then stroke the path; even-odd
b	Close, fill and then stroke the path; winding
b*	Close, fill and then stroke the path; even-odd
n	End the path object
Clipping paths
W	Modify yhe current clipping path; winding
W*	Modify the current clipping path; even-odd
Text objects
BT	Begin a text object
ET	End a text object
Text state
Tc	Set the character spacing (charSpace)
Tw	Set the word spacing (wordSpace)
Tz	Set the horz scaling (scale)
TL	Set the text leading (leading)
Tf	Set the text font (font size)
Tr	Set the rendering mode (render)
Ts	Set the text rise (rise)
Text positioning
Td	Move to the start of the next line (tx ty)
TD	Move to the start of the next line rel (tx ty)
Tm	Set the text matrix (a b c d e f)
T*	Move to the start of the next line
Text showing
Tj	Show a text string (string)
TJ	Show one or more text strings (array)
'	Move to the next line and show a text string (string)
"	Move to the next line and show a text string (aw ac string)
Type 3 fonts
d0	Set width info for the glyph (wx wy)
d1	Set width and bbox info for the glypj (wx wy llx lly urx ury)
Color
CS	Set the current colour space (name)
cs	Same as CS; non-stroking operations
SC	Set the colour to use for stroking (c1...cn)
SCN	Same as SC; supports Pattern,Separation,DeviceN and ICCBased (c1...cn; c1...cn name)
sc	Same as SC; for non-stroking operations (c1...cn)
scn	same as SCN; for non-stroking operations (c1...cn; c1...cn names)
G	Set the stroking colour space to DeviceGray (gray)
g	Same as G; for non-stroking operations (gray)
RG	Set the stroking colour space to DeviceRGB (r g b)
rg	Same as RG; for non-stroking operations
K	Set the stroking colour space to DeviceCMYK (c m y k)
k	Same as K; for non-stroking operations
Shading patterns
sh	Paint the shape and colour shading (name)
Inline images
BI	Begin an inline image object
ID	Begin the image data for an inline image object
EI	End an inline image object
XObjects
Do	Invoke named XObject (name)
Marked content
MP	Desginate a marked-content point (tag)
DP	Designate a marked-content point (tag properties)
BMC	Begin a marked-content sequence (tag)
BDC	Begin a marked-content sequence (tag properties)
EMC	End a marked-content sequence
Compatibility
BX	Begin compatibility section
EX	End compatibility section

PDFファイルを作成する

プログラムからPDFファイルを作成。

注釈(アノーテーション)を表示しようと思ったら、外観辞書(AP辞書)なる物が必要。情報源

実装方法として、既存のPDFに、注釈だけを後付けする方法。iTextSharp

細かい部分のドキュメントが十分ではないので、PDF32000_2008.pdfなどを調べます。

外観辞書のデバッグには、他のPDFのものとも比べたいはず。PDFXplorerなどを使います。