1 // Copyright 2016 PDFium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com 6 7 #include "core/fpdfapi/page/cpdf_pageobjectholder.h" 8 9 #include <algorithm> 10 11 #include "core/fpdfapi/page/cpdf_allstates.h" 12 #include "core/fpdfapi/page/cpdf_contentparser.h" 13 #include "core/fpdfapi/page/cpdf_pageobject.h" 14 #include "core/fpdfapi/parser/cpdf_dictionary.h" 15 16 CPDF_PageObjectHolder::CPDF_PageObjectHolder(CPDF_Document* pDoc, 17 CPDF_Dictionary* pFormDict) 18 : m_pFormDict(pFormDict), 19 m_pFormStream(nullptr), 20 m_pDocument(pDoc), 21 m_pPageResources(nullptr), 22 m_pResources(nullptr), 23 m_iTransparency(0), 24 m_bBackgroundAlphaNeeded(false), 25 m_ParseState(CONTENT_NOT_PARSED) { 26 // TODO(thestig): Check if |m_pFormDict| is never a nullptr and simplify 27 // callers that checks for that. 28 } 29 30 CPDF_PageObjectHolder::~CPDF_PageObjectHolder() {} 31 32 bool CPDF_PageObjectHolder::IsPage() const { 33 return false; 34 } 35 36 void CPDF_PageObjectHolder::ContinueParse(IFX_PauseIndicator* pPause) { 37 if (!m_pParser) 38 return; 39 40 if (m_pParser->Continue(pPause)) 41 return; 42 43 m_ParseState = CONTENT_PARSED; 44 if (m_pParser->GetCurStates()) 45 m_LastCTM = m_pParser->GetCurStates()->m_CTM; 46 m_pParser.reset(); 47 } 48 49 void CPDF_PageObjectHolder::AddImageMaskBoundingBox(const CFX_FloatRect& box) { 50 m_MaskBoundingBoxes.push_back(box); 51 } 52 53 void CPDF_PageObjectHolder::Transform(const CFX_Matrix& matrix) { 54 for (auto& pObj : m_PageObjectList) 55 pObj->Transform(matrix); 56 } 57 58 CFX_FloatRect CPDF_PageObjectHolder::CalcBoundingBox() const { 59 if (m_PageObjectList.empty()) 60 return CFX_FloatRect(); 61 62 float left = 1000000.0f; 63 float right = -1000000.0f; 64 float bottom = 1000000.0f; 65 float top = -1000000.0f; 66 for (const auto& pObj : m_PageObjectList) { 67 left = std::min(left, pObj->m_Left); 68 right = std::max(right, pObj->m_Right); 69 bottom = std::min(bottom, pObj->m_Bottom); 70 top = std::max(top, pObj->m_Top); 71 } 72 return CFX_FloatRect(left, bottom, right, top); 73 } 74 75 void CPDF_PageObjectHolder::LoadTransInfo() { 76 if (!m_pFormDict) { 77 return; 78 } 79 CPDF_Dictionary* pGroup = m_pFormDict->GetDictFor("Group"); 80 if (!pGroup) { 81 return; 82 } 83 if (pGroup->GetStringFor("S") != "Transparency") { 84 return; 85 } 86 m_iTransparency |= PDFTRANS_GROUP; 87 if (pGroup->GetIntegerFor("I")) { 88 m_iTransparency |= PDFTRANS_ISOLATED; 89 } 90 if (pGroup->GetIntegerFor("K")) { 91 m_iTransparency |= PDFTRANS_KNOCKOUT; 92 } 93 } 94
