diff options
Diffstat (limited to 'fpdfsdk/src/fpdf_transformpage.cpp')
| -rw-r--r-- | fpdfsdk/src/fpdf_transformpage.cpp | 325 |
1 files changed, 325 insertions, 0 deletions
diff --git a/fpdfsdk/src/fpdf_transformpage.cpp b/fpdfsdk/src/fpdf_transformpage.cpp new file mode 100644 index 0000000000..f171c5e526 --- /dev/null +++ b/fpdfsdk/src/fpdf_transformpage.cpp @@ -0,0 +1,325 @@ +// Copyright 2014 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 "../include/fsdk_define.h"
+#include "../include/fpdf_transformpage.h"
+
+DLLEXPORT void STDCALL FPDFPage_SetMediaBox(FPDF_PAGE page, float left, float bottom, float right, float top)
+{
+ if(!page)
+ return;
+ CPDF_Page* pPage = (CPDF_Page*)page;
+ CPDF_Dictionary* pPageDict = pPage->m_pFormDict;
+ CPDF_Array* pMediaBoxArray = FX_NEW CPDF_Array;
+ pMediaBoxArray->Add(FX_NEW CPDF_Number(left));
+ pMediaBoxArray->Add(FX_NEW CPDF_Number(bottom));
+ pMediaBoxArray->Add(FX_NEW CPDF_Number(FX_FLOAT(right)));
+ pMediaBoxArray->Add(FX_NEW CPDF_Number(FX_FLOAT(top)));
+
+ pPageDict->SetAt("MediaBox", pMediaBoxArray);
+}
+
+
+DLLEXPORT void STDCALL FPDFPage_SetCropBox(FPDF_PAGE page, float left, float bottom, float right, float top)
+{
+ if(!page)
+ return;
+ CPDF_Page* pPage = (CPDF_Page*)page;
+ CPDF_Dictionary* pPageDict = pPage->m_pFormDict;
+ CPDF_Array* pCropBoxArray = FX_NEW CPDF_Array;
+ pCropBoxArray->Add(FX_NEW CPDF_Number(left));
+ pCropBoxArray->Add(FX_NEW CPDF_Number(bottom));
+ pCropBoxArray->Add(FX_NEW CPDF_Number(FX_FLOAT(right)));
+ pCropBoxArray->Add(FX_NEW CPDF_Number(FX_FLOAT(top)));
+
+
+ pPageDict->SetAt("CropBox", pCropBoxArray);
+}
+
+
+DLLEXPORT FX_BOOL STDCALL FPDFPage_GetMediaBox(FPDF_PAGE page, float* left, float* bottom, float* right, float* top)
+{
+ if(!page)
+ return FALSE;
+ CPDF_Page* pPage = (CPDF_Page*)page;
+ CPDF_Dictionary* pPageDict = pPage->m_pFormDict;
+ CPDF_Array* pArray = pPageDict->GetArray("MediaBox");
+ if(pArray)
+ {
+ *left = pArray->GetFloat(0);
+ *bottom = pArray->GetFloat(1);
+ *right = pArray->GetFloat(2);
+ *top = pArray->GetFloat(3);
+ return TRUE;
+ }
+ return FALSE;
+}
+
+DLLEXPORT FPDF_BOOL STDCALL FPDFPage_GetCropBox(FPDF_PAGE page, float* left, float* bottom, float* right, float* top)
+{
+ if(!page)
+ return FALSE;
+ CPDF_Page* pPage = (CPDF_Page*)page;
+ CPDF_Dictionary* pPageDict = pPage->m_pFormDict;
+ CPDF_Array* pArray = pPageDict->GetArray("CropBox");
+ if(pArray)
+ {
+ *left = pArray->GetFloat(0);
+ *bottom = pArray->GetFloat(1);
+ *right = pArray->GetFloat(2);
+ *top = pArray->GetFloat(3);
+ return TRUE;
+ }
+ return FALSE;
+}
+
+DLLEXPORT FPDF_BOOL STDCALL FPDFPage_TransFormWithClip(FPDF_PAGE page, FS_MATRIX* matrix, FS_RECTF* clipRect)
+{
+ if(!page)
+ return FALSE;
+
+ CFX_ByteTextBuf textBuf;
+ textBuf<<"q ";
+ CFX_FloatRect rect(clipRect->left, clipRect->bottom, clipRect->right, clipRect->top);
+ rect.Normalize();
+ CFX_ByteString bsClipping;
+ bsClipping.Format("%f %f %f %f re W* n ", rect.left, rect.bottom, rect.Width(), rect.Height());
+ textBuf<<bsClipping;
+
+ CFX_ByteString bsMatix;
+ bsMatix.Format("%f %f %f %f %f %f cm ", matrix->a, matrix->b,matrix->c,matrix->d,matrix->e,matrix->f);
+ textBuf<<bsMatix;
+
+
+ CPDF_Page* pPage = (CPDF_Page*)page;
+ CPDF_Dictionary* pPageDic = pPage->m_pFormDict;
+ CPDF_Object* pContentObj = pPageDic->GetElement("Contents");
+ if(!pContentObj)
+ pContentObj = pPageDic->GetArray("Contents");
+ if(!pContentObj)
+ return FALSE;
+
+ CPDF_Dictionary* pDic = FX_NEW CPDF_Dictionary;
+ CPDF_Stream* pStream = FX_NEW CPDF_Stream(NULL,0, pDic);
+ pStream->SetData(textBuf.GetBuffer(), textBuf.GetSize(), FALSE, FALSE);
+ CPDF_Document* pDoc = pPage->m_pDocument;
+ if(!pDoc)
+ return FALSE;
+ pDoc->AddIndirectObject(pStream);
+
+ pDic = FX_NEW CPDF_Dictionary;
+ CPDF_Stream* pEndStream = FX_NEW CPDF_Stream(NULL,0, pDic);
+ pEndStream->SetData((FX_LPCBYTE)" Q", 2, FALSE, FALSE);
+ pDoc->AddIndirectObject(pEndStream);
+
+ CPDF_Array* pContentArray = NULL;
+ if (pContentObj && pContentObj->GetType() == PDFOBJ_ARRAY)
+ {
+ pContentArray = (CPDF_Array*)pContentObj;
+ CPDF_Reference* pRef = FX_NEW CPDF_Reference(pDoc, pStream->GetObjNum());
+ pContentArray->InsertAt(0, pRef);
+ pContentArray->AddReference(pDoc,pEndStream);
+
+ }
+ else if(pContentObj && pContentObj->GetType() == PDFOBJ_REFERENCE)
+ {
+ CPDF_Reference* pReference = (CPDF_Reference*)pContentObj;
+ CPDF_Object* pDirectObj = pReference->GetDirect();
+ if(pDirectObj != NULL)
+ {
+ if(pDirectObj->GetType() == PDFOBJ_ARRAY)
+ {
+ pContentArray = (CPDF_Array*)pDirectObj;
+ CPDF_Reference* pRef = FX_NEW CPDF_Reference(pDoc, pStream->GetObjNum());
+ pContentArray->InsertAt(0, pRef);
+ pContentArray->AddReference(pDoc,pEndStream);
+
+ }
+ else if(pDirectObj->GetType() == PDFOBJ_STREAM)
+ {
+ pContentArray = FX_NEW CPDF_Array();
+ pContentArray->AddReference(pDoc,pStream->GetObjNum());
+ pContentArray->AddReference(pDoc,pDirectObj->GetObjNum());
+ pContentArray->AddReference(pDoc, pEndStream);
+ pPageDic->SetAtReference("Contents", pDoc, pDoc->AddIndirectObject(pContentArray));
+ }
+ }
+ }
+
+ //Need to transform the patterns as well.
+ CPDF_Dictionary* pRes = pPageDic->GetDict(FX_BSTRC("Resources"));
+ if(pRes)
+ {
+ CPDF_Dictionary* pPattenDict = pRes->GetDict(FX_BSTRC("Pattern"));
+ if(pPattenDict)
+ {
+ FX_POSITION pos = pPattenDict->GetStartPos();
+ while(pos)
+ {
+ CPDF_Dictionary* pDict = NULL;
+ CFX_ByteString key;
+ CPDF_Object* pObj = pPattenDict->GetNextElement(pos, key);
+ if(pObj->GetType() == PDFOBJ_REFERENCE)
+ pObj = pObj->GetDirect();
+ if(pObj->GetType() == PDFOBJ_DICTIONARY)
+ {
+ pDict = (CPDF_Dictionary*)pObj;
+ }
+ else if(pObj->GetType() == PDFOBJ_STREAM)
+ {
+ pDict = ((CPDF_Stream*)pObj)->GetDict();
+ }
+ else
+ continue;
+
+ CFX_AffineMatrix m = pDict->GetMatrix(FX_BSTRC("Matrix"));
+ CFX_AffineMatrix t = *(CFX_AffineMatrix*)matrix;
+ m.Concat(t);
+ pDict->SetAtMatrix(FX_BSTRC("Matrix"), m);
+ }
+ }
+ }
+
+ return TRUE;
+}
+
+DLLEXPORT void STDCALL FPDFPageObj_TransformClipPath(FPDF_PAGEOBJECT page_object,double a, double b, double c, double d, double e, double f)
+{
+ CPDF_PageObject* pPageObj = (CPDF_PageObject*)page_object;
+ if(pPageObj == NULL)
+ return;
+ CFX_AffineMatrix matrix((FX_FLOAT)a,(FX_FLOAT)b,(FX_FLOAT)c,(FX_FLOAT)d,(FX_FLOAT)e,(FX_FLOAT)f);
+
+ //Special treatment to shading object, because the ClipPath for shading object is already transformed.
+ if(pPageObj->m_Type != PDFPAGE_SHADING)
+ pPageObj->TransformClipPath(matrix);
+ pPageObj->TransformGeneralState(matrix);
+}
+
+
+DLLEXPORT FPDF_CLIPPATH STDCALL FPDF_CreateClipPath(float left, float bottom, float right, float top)
+{
+ CPDF_ClipPath* pNewClipPath = FX_NEW CPDF_ClipPath();
+ pNewClipPath->GetModify();
+ CPDF_Path Path;
+ Path.GetModify();
+ Path.AppendRect(left, bottom, right, top);
+ pNewClipPath->AppendPath(Path, FXFILL_ALTERNATE, FALSE);
+ return pNewClipPath;
+}
+
+DLLEXPORT void STDCALL FPDF_DestroyClipPath(FPDF_CLIPPATH clipPath)
+{
+ if(clipPath)
+ delete (CPDF_ClipPath*)clipPath;
+}
+
+void OutputPath(CFX_ByteTextBuf& buf, CPDF_Path path)
+{
+ const CFX_PathData* pPathData = path;
+ if (pPathData == NULL) return;
+
+ FX_PATHPOINT* pPoints = pPathData->GetPoints();
+
+ if (path.IsRect()) {
+ buf << (pPoints[0].m_PointX) << " " << (pPoints[0].m_PointY) << " "
+ << (pPoints[2].m_PointX - pPoints[0].m_PointX) << " "
+ << (pPoints[2].m_PointY - pPoints[0].m_PointY) << " re\n";
+ return;
+ }
+
+ CFX_ByteString temp;
+ for (int i = 0; i < pPathData->GetPointCount(); i ++) {
+ buf << (pPoints[i].m_PointX) << " " << (pPoints[i].m_PointY);
+ int point_type = pPoints[i].m_Flag & FXPT_TYPE;
+ if (point_type == FXPT_MOVETO)
+ buf << " m\n";
+ else if (point_type == FXPT_BEZIERTO) {
+ buf << " " << (pPoints[i+1].m_PointX) << " " << (pPoints[i+1].m_PointY) << " " <<
+ (pPoints[i+2].m_PointX) << " " << (pPoints[i+2].m_PointY);
+ if (pPoints[i+2].m_Flag & FXPT_CLOSEFIGURE)
+ buf << " c h\n";
+ else
+ buf << " c\n";
+ i += 2;
+ } else if (point_type == FXPT_LINETO) {
+ if (pPoints[i].m_Flag & FXPT_CLOSEFIGURE)
+ buf << " l h\n";
+ else
+ buf << " l\n";
+ }
+ }
+}
+
+DLLEXPORT void STDCALL FPDFPage_InsertClipPath(FPDF_PAGE page,FPDF_CLIPPATH clipPath)
+{
+ if(!page)
+ return;
+ CPDF_Page* pPage = (CPDF_Page*)page;
+ CPDF_Dictionary* pPageDic = pPage->m_pFormDict;
+ CPDF_Object* pContentObj = pPageDic->GetElement("Contents");
+ if(!pContentObj)
+ pContentObj = pPageDic->GetArray("Contents");
+ if(!pContentObj)
+ return;
+
+ CFX_ByteTextBuf strClip;
+ CPDF_ClipPath* pClipPath = (CPDF_ClipPath*)clipPath;
+ FX_DWORD i;
+ for (i = 0; i < pClipPath->GetPathCount(); i ++) {
+ CPDF_Path path = pClipPath->GetPath(i);
+ int iClipType = pClipPath->GetClipType(i);
+ if (path.GetPointCount() == 0) {
+ // Empty clipping (totally clipped out)
+ strClip << "0 0 m W n ";
+ } else {
+ OutputPath(strClip, path);
+ if (iClipType == FXFILL_WINDING)
+ strClip << "W n\n";
+ else
+ strClip << "W* n\n";
+ }
+ }
+ CPDF_Dictionary* pDic = FX_NEW CPDF_Dictionary;
+ CPDF_Stream* pStream = FX_NEW CPDF_Stream(NULL,0, pDic);
+ pStream->SetData(strClip.GetBuffer(), strClip.GetSize(), FALSE, FALSE);
+ CPDF_Document* pDoc = pPage->m_pDocument;
+ if(!pDoc)
+ return;
+ pDoc->AddIndirectObject(pStream);
+
+ CPDF_Array* pContentArray = NULL;
+ if (pContentObj && pContentObj->GetType() == PDFOBJ_ARRAY)
+ {
+ pContentArray = (CPDF_Array*)pContentObj;
+ CPDF_Reference* pRef = FX_NEW CPDF_Reference(pDoc, pStream->GetObjNum());
+ pContentArray->InsertAt(0, pRef);
+
+ }
+ else if(pContentObj && pContentObj->GetType() == PDFOBJ_REFERENCE)
+ {
+ CPDF_Reference* pReference = (CPDF_Reference*)pContentObj;
+ CPDF_Object* pDirectObj = pReference->GetDirect();
+ if(pDirectObj != NULL)
+ {
+ if(pDirectObj->GetType() == PDFOBJ_ARRAY)
+ {
+ pContentArray = (CPDF_Array*)pDirectObj;
+ CPDF_Reference* pRef = FX_NEW CPDF_Reference(pDoc, pStream->GetObjNum());
+ pContentArray->InsertAt(0, pRef);
+
+ }
+ else if(pDirectObj->GetType() == PDFOBJ_STREAM)
+ {
+ pContentArray = FX_NEW CPDF_Array();
+ pContentArray->AddReference(pDoc,pStream->GetObjNum());
+ pContentArray->AddReference(pDoc,pDirectObj->GetObjNum());
+ pPageDic->SetAtReference("Contents", pDoc, pDoc->AddIndirectObject(pContentArray));
+ }
+ }
+ }
+}
+
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