| // 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 "core/fpdfapi/fpdf_page/include/cpdf_page.h" |
| #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h" |
| #include "core/fpdfapi/fpdf_parser/include/cpdf_document.h" |
| #include "core/fpdfapi/fpdf_parser/include/cpdf_number.h" |
| #include "core/fpdfapi/fpdf_parser/include/cpdf_reference.h" |
| #include "fpdfsdk/include/fsdk_define.h" |
| |
| namespace { |
| |
| void SetBoundingBox(CPDF_Page* page, |
| const CFX_ByteStringC& key, |
| float left, |
| float bottom, |
| float right, |
| float top) { |
| CPDF_Dictionary* pPageDict = page->m_pFormDict; |
| CPDF_Array* pBoundingBoxArray = new CPDF_Array; |
| pBoundingBoxArray->Add(new CPDF_Number(left)); |
| pBoundingBoxArray->Add(new CPDF_Number(bottom)); |
| pBoundingBoxArray->Add(new CPDF_Number(right)); |
| pBoundingBoxArray->Add(new CPDF_Number(top)); |
| pPageDict->SetAt(key, pBoundingBoxArray); |
| } |
| |
| FPDF_BOOL GetBoundingBox(CPDF_Page* page, |
| const CFX_ByteStringC& key, |
| float* left, |
| float* bottom, |
| float* right, |
| float* top) { |
| CPDF_Dictionary* pPageDict = page->m_pFormDict; |
| CPDF_Array* pArray = pPageDict->GetArrayBy(key); |
| if (!pArray) |
| return FALSE; |
| |
| *left = pArray->GetFloatAt(0); |
| *bottom = pArray->GetFloatAt(1); |
| *right = pArray->GetFloatAt(2); |
| *top = pArray->GetFloatAt(3); |
| return TRUE; |
| } |
| |
| } // namespace |
| |
| DLLEXPORT void STDCALL FPDFPage_SetMediaBox(FPDF_PAGE page, |
| float left, |
| float bottom, |
| float right, |
| float top) { |
| CPDF_Page* pPage = CPDFPageFromFPDFPage(page); |
| if (!pPage) |
| return; |
| |
| SetBoundingBox(pPage, "MediaBox", left, bottom, right, top); |
| } |
| |
| DLLEXPORT void STDCALL FPDFPage_SetCropBox(FPDF_PAGE page, |
| float left, |
| float bottom, |
| float right, |
| float top) { |
| CPDF_Page* pPage = CPDFPageFromFPDFPage(page); |
| if (!pPage) |
| return; |
| |
| SetBoundingBox(pPage, "CropBox", left, bottom, right, top); |
| } |
| |
| DLLEXPORT FPDF_BOOL STDCALL FPDFPage_GetMediaBox(FPDF_PAGE page, |
| float* left, |
| float* bottom, |
| float* right, |
| float* top) { |
| CPDF_Page* pPage = CPDFPageFromFPDFPage(page); |
| return pPage && GetBoundingBox(pPage, "MediaBox", left, bottom, right, top); |
| } |
| |
| DLLEXPORT FPDF_BOOL STDCALL FPDFPage_GetCropBox(FPDF_PAGE page, |
| float* left, |
| float* bottom, |
| float* right, |
| float* top) { |
| CPDF_Page* pPage = CPDFPageFromFPDFPage(page); |
| return pPage && GetBoundingBox(pPage, "CropBox", left, bottom, right, top); |
| } |
| |
| DLLEXPORT FPDF_BOOL STDCALL FPDFPage_TransFormWithClip(FPDF_PAGE page, |
| FS_MATRIX* matrix, |
| FS_RECTF* clipRect) { |
| CPDF_Page* pPage = CPDFPageFromFPDFPage(page); |
| if (!pPage) |
| 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_Dictionary* pPageDic = pPage->m_pFormDict; |
| CPDF_Object* pContentObj = |
| pPageDic ? pPageDic->GetElement("Contents") : nullptr; |
| if (!pContentObj) |
| pContentObj = pPageDic ? pPageDic->GetArrayBy("Contents") : nullptr; |
| if (!pContentObj) |
| return FALSE; |
| |
| CPDF_Dictionary* pDic = new CPDF_Dictionary; |
| CPDF_Stream* pStream = new CPDF_Stream(nullptr, 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(nullptr, 0, pDic); |
| pEndStream->SetData((const uint8_t*)" Q", 2, FALSE, FALSE); |
| pDoc->AddIndirectObject(pEndStream); |
| |
| CPDF_Array* pContentArray = nullptr; |
| if (CPDF_Array* pArray = ToArray(pContentObj)) { |
| pContentArray = pArray; |
| CPDF_Reference* pRef = new CPDF_Reference(pDoc, pStream->GetObjNum()); |
| pContentArray->InsertAt(0, pRef); |
| pContentArray->AddReference(pDoc, pEndStream); |
| } else if (CPDF_Reference* pReference = ToReference(pContentObj)) { |
| CPDF_Object* pDirectObj = pReference->GetDirect(); |
| if (pDirectObj) { |
| if (CPDF_Array* pArray = pDirectObj->AsArray()) { |
| pContentArray = pArray; |
| CPDF_Reference* pRef = new CPDF_Reference(pDoc, pStream->GetObjNum()); |
| pContentArray->InsertAt(0, pRef); |
| pContentArray->AddReference(pDoc, pEndStream); |
| } else if (pDirectObj->IsStream()) { |
| 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->GetDictBy("Resources"); |
| if (pRes) { |
| CPDF_Dictionary* pPattenDict = pRes->GetDictBy("Pattern"); |
| if (pPattenDict) { |
| for (const auto& it : *pPattenDict) { |
| CPDF_Object* pObj = it.second; |
| if (pObj->IsReference()) |
| pObj = pObj->GetDirect(); |
| |
| CPDF_Dictionary* pDict = nullptr; |
| if (pObj->IsDictionary()) |
| pDict = pObj->AsDictionary(); |
| else if (CPDF_Stream* pStream = pObj->AsStream()) |
| pDict = pStream->GetDict(); |
| else |
| continue; |
| |
| CFX_Matrix m = pDict->GetMatrixBy("Matrix"); |
| CFX_Matrix t = *(CFX_Matrix*)matrix; |
| m.Concat(t); |
| pDict->SetAtMatrix("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) |
| return; |
| CFX_Matrix 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->IsShading()) |
| 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) { |
| delete (CPDF_ClipPath*)clipPath; |
| } |
| |
| void OutputPath(CFX_ByteTextBuf& buf, CPDF_Path path) { |
| const CFX_PathData* pPathData = path; |
| if (!pPathData) |
| 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) { |
| CPDF_Page* pPage = CPDFPageFromFPDFPage(page); |
| if (!pPage) |
| return; |
| |
| CPDF_Dictionary* pPageDic = pPage->m_pFormDict; |
| CPDF_Object* pContentObj = |
| pPageDic ? pPageDic->GetElement("Contents") : nullptr; |
| if (!pContentObj) |
| pContentObj = pPageDic ? pPageDic->GetArrayBy("Contents") : nullptr; |
| 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(nullptr, 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 = nullptr; |
| if (CPDF_Array* pArray = ToArray(pContentObj)) { |
| pContentArray = pArray; |
| CPDF_Reference* pRef = new CPDF_Reference(pDoc, pStream->GetObjNum()); |
| pContentArray->InsertAt(0, pRef); |
| } else if (CPDF_Reference* pReference = ToReference(pContentObj)) { |
| CPDF_Object* pDirectObj = pReference->GetDirect(); |
| if (pDirectObj) { |
| if (CPDF_Array* pArray = pDirectObj->AsArray()) { |
| pContentArray = pArray; |
| CPDF_Reference* pRef = new CPDF_Reference(pDoc, pStream->GetObjNum()); |
| pContentArray->InsertAt(0, pRef); |
| } else if (pDirectObj->IsStream()) { |
| pContentArray = new CPDF_Array(); |
| pContentArray->AddReference(pDoc, pStream->GetObjNum()); |
| pContentArray->AddReference(pDoc, pDirectObj->GetObjNum()); |
| pPageDic->SetAtReference("Contents", pDoc, |
| pDoc->AddIndirectObject(pContentArray)); |
| } |
| } |
| } |
| } |
