Generate default AP stream for ink annotation.

core/fpdfdoc/cpvt_generateap.cpp

 // Copyright 2016 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "core/fpdfdoc/cpvt_generateap.h"
 
 #include "core/fpdfapi/fpdf_font/include/cpdf_font.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h"
@@ skipping 700 matching lines @@
              << rect.left << " " << rect.bottom << " l "
              << "h f\n";
 
   CPDF_Dictionary* pExtGStateDict =
       GenerateExtGStateDict(*pAnnotDict, sExtGSDictName, "Multiply");
   GenerateAndSetAPDict(pDoc, pAnnotDict, sAppStream, pExtGStateDict);
 
   return true;
 }
 
+bool CPVT_GenerateAP::GenerateInkAP(CPDF_Document* pDoc,
+                                    CPDF_Dictionary* pAnnotDict) {
+  // If AP dictionary exists, we use the appearance defined in the
+  // existing AP dictionary.
+  if (pAnnotDict->KeyExist("AP"))
+    return false;
+
+  FX_FLOAT fBorderWidth = GetBorderWidth(*pAnnotDict);
+  bool bIsStroke = fBorderWidth > 0;
+
+  if (!bIsStroke)
+    return false;
+
+  CPDF_Array* pInkList = pAnnotDict->GetArrayBy("InkList");
+  if (!pInkList || pInkList->IsEmpty())
+    return false;
+
+  CFX_ByteTextBuf sAppStream;
+  CFX_ByteString sExtGSDictName = "GS";
+  sAppStream << "/" << sExtGSDictName << " gs ";
+
+  sAppStream << GetColorStringWithDefault(pAnnotDict->GetArrayBy("C"),
+                                          CPVT_Color(CPVT_Color::kRGB, 0, 0, 0),
+                                          PaintOperation::STROKE);
+
+  sAppStream << fBorderWidth << " w ";
+  sAppStream << GetDashPatternString(*pAnnotDict);
+
+  // Set inflated rect as a new rect because paths near the border with large
+  // width should not be clipped to the original rect.
+  CFX_FloatRect rect = pAnnotDict->GetRectBy("Rect");
+  rect.Inflate(fBorderWidth / 2, fBorderWidth / 2);
+  pAnnotDict->SetAtRect("Rect", rect);
+
+  for (size_t i = 0; i < pInkList->GetCount(); i++) {
+    CPDF_Array* pInkCoordList = pInkList->GetArrayAt(i);
+    if (!pInkCoordList || pInkCoordList->GetCount() < 2)
+      continue;
+
+    sAppStream << pInkCoordList->GetNumberAt(0) << " "
+               << pInkCoordList->GetNumberAt(1) << " m ";
+
+    for (size_t i = 0; i < pInkCoordList->GetCount() - 1; i += 2) {

[Lei Zhang, 2016/08/09 21:38:57]

This |i| is a shadow variable. Time for |j|.

[jaepark, 2016/08/09 22:19:09]

Done.

+      sAppStream << pInkCoordList->GetNumberAt(i) << " "
+                 << pInkCoordList->GetNumberAt(i + 1) << " l ";
+    }
+
+    sAppStream << "S\n";
+  }
+
+  CPDF_Dictionary* pExtGStateDict =
+      GenerateExtGStateDict(*pAnnotDict, sExtGSDictName, "Normal");
+  GenerateAndSetAPDict(pDoc, pAnnotDict, sAppStream, pExtGStateDict);
+  return true;
+}
+
 bool CPVT_GenerateAP::GenerateUnderlineAP(CPDF_Document* pDoc,
                                           CPDF_Dictionary* pAnnotDict) {
   // If AP dictionary exists, we use the appearance defined in the
   // existing AP dictionary.
   if (pAnnotDict->KeyExist("AP"))
     return false;
 
   CFX_ByteTextBuf sAppStream;
   CFX_ByteString sExtGSDictName = "GS";
   sAppStream << "/" << sExtGSDictName << " gs ";
@@ skipping 407 matching lines @@
                                                  int32_t nFontIndex,
                                                  FX_FLOAT fFontSize) {
   CFX_ByteTextBuf sRet;
   if (pFontMap) {
     CFX_ByteString sFontAlias = pFontMap->GetPDFFontAlias(nFontIndex);
     if (sFontAlias.GetLength() > 0 && fFontSize > 0)
       sRet << "/" << sFontAlias << " " << fFontSize << " Tf\n";
   }
   return sRet.MakeString();
 }