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
CPDF_PageObjectHolder()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
~CPDF_PageObjectHolder()27 CPDF_PageObjectHolder::~CPDF_PageObjectHolder() {}
28
ContinueParse(IFX_Pause * pPause)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
Transform(const CFX_Matrix & matrix)40 void CPDF_PageObjectHolder::Transform(const CFX_Matrix& matrix) {
41 for (auto& pObj : m_PageObjectList)
42 pObj->Transform(matrix);
43 }
44
CalcBoundingBox() const45 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
LoadTransInfo()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