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_contentparser.h" 12 #include "core/fpdfapi/page/cpdf_pageobject.h" 13 #include "core/fpdfapi/page/pageint.h" 14 #include "core/fpdfapi/parser/cpdf_dictionary.h" 15 16 CPDF_PageObjectHolder::CPDF_PageObjectHolder() 17 : m_pFormDict(nullptr), 18 m_pFormStream(nullptr), 19 m_pDocument(nullptr), 20 m_pPageResources(nullptr), 21 m_pResources(nullptr), 22 m_Transparency(0), 23 m_bBackgroundAlphaNeeded(false), 24 m_bHasImageMask(false), 25 m_ParseState(CONTENT_NOT_PARSED) {} 26 27 CPDF_PageObjectHolder::~CPDF_PageObjectHolder() {} 28 29 void CPDF_PageObjectHolder::ContinueParse(IFX_Pause* pPause) { 30 if (!m_pParser) { 31 return; 32 } 33 m_pParser->Continue(pPause); 34 if (m_pParser->GetStatus() == CPDF_ContentParser::Done) { 35 m_ParseState = CONTENT_PARSED; 36 m_pParser.reset(); 37 } 38 } 39 40 void CPDF_PageObjectHolder::Transform(const CFX_Matrix& matrix) { 41 for (auto& pObj : m_PageObjectList) 42 pObj->Transform(matrix); 43 } 44 45 CFX_FloatRect CPDF_PageObjectHolder::CalcBoundingBox() const { 46 if (m_PageObjectList.empty()) 47 return CFX_FloatRect(0, 0, 0, 0); 48 49 FX_FLOAT left = 1000000.0f; 50 FX_FLOAT right = -1000000.0f; 51 FX_FLOAT bottom = 1000000.0f; 52 FX_FLOAT top = -1000000.0f; 53 for (const auto& pObj : m_PageObjectList) { 54 left = std::min(left, pObj->m_Left); 55 right = std::max(right, pObj->m_Right); 56 bottom = std::min(bottom, pObj->m_Bottom); 57 top = std::max(top, pObj->m_Top); 58 } 59 return CFX_FloatRect(left, bottom, right, top); 60 } 61 62 void CPDF_PageObjectHolder::LoadTransInfo() { 63 if (!m_pFormDict) { 64 return; 65 } 66 CPDF_Dictionary* pGroup = m_pFormDict->GetDictFor("Group"); 67 if (!pGroup) { 68 return; 69 } 70 if (pGroup->GetStringFor("S") != "Transparency") { 71 return; 72 } 73 m_Transparency |= PDFTRANS_GROUP; 74 if (pGroup->GetIntegerFor("I")) { 75 m_Transparency |= PDFTRANS_ISOLATED; 76 } 77 if (pGroup->GetIntegerFor("K")) { 78 m_Transparency |= PDFTRANS_KNOCKOUT; 79 } 80 } 81
