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// 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 "../../public/fpdf_transformpage.h"
#include "../include/fsdk_define.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 = new CPDF_Array;
pMediaBoxArray->Add(new CPDF_Number(left));
pMediaBoxArray->Add(new CPDF_Number(bottom));
pMediaBoxArray->Add(new CPDF_Number(FX_FLOAT(right)));
pMediaBoxArray->Add(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 = new CPDF_Array;
pCropBoxArray->Add(new CPDF_Number(left));
pCropBoxArray->Add(new CPDF_Number(bottom));
pCropBoxArray->Add(new CPDF_Number(FX_FLOAT(right)));
pCropBoxArray->Add(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 ? pPageDic->GetElement("Contents") : NULL;
if(!pContentObj)
pContentObj = pPageDic ? pPageDic->GetArray("Contents") : NULL;
if(!pContentObj)
return FALSE;
CPDF_Dictionary* pDic = new CPDF_Dictionary;
CPDF_Stream* pStream = 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 = new CPDF_Dictionary;
CPDF_Stream* pEndStream = 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 = 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 = new CPDF_Reference(pDoc, pStream->GetObjNum());
pContentArray->InsertAt(0, pRef);
pContentArray->AddReference(pDoc,pEndStream);
}
else if(pDirectObj->GetType() == PDFOBJ_STREAM)
{
pContentArray = 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 = 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 ? pPageDic->GetElement("Contents") : NULL;
if(!pContentObj)
pContentObj = pPageDic ? pPageDic->GetArray("Contents") : NULL;
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 = new CPDF_Dictionary;
CPDF_Stream* pStream = 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 = 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 = new CPDF_Reference(pDoc, pStream->GetObjNum());
pContentArray->InsertAt(0, pRef);
}
else if(pDirectObj->GetType() == PDFOBJ_STREAM)
{
pContentArray = new CPDF_Array();
pContentArray->AddReference(pDoc,pStream->GetObjNum());
pContentArray->AddReference(pDoc,pDirectObj->GetObjNum());
pPageDic->SetAtReference("Contents", pDoc, pDoc->AddIndirectObject(pContentArray));
}
}
}
}