// Copyright 2016 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#include "core/fpdfapi/fpdf_page/cpdf_shadingpattern.h"
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#include "core/fpdfapi/fpdf_page/pageint.h"
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#include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
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#include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h"
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#include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
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#include "core/fpdfapi/fpdf_parser/include/cpdf_object.h"
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namespace {
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ShadingType ToShadingType(int type) {
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return (type > static_cast<int>(kInvalidShading) &&
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type < static_cast<int>(kMaxShading))
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? static_cast<ShadingType>(type)
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: kInvalidShading;
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}
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} // namespace
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CPDF_ShadingPattern::CPDF_ShadingPattern(CPDF_Document* pDoc,
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CPDF_Object* pPatternObj,
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FX_BOOL bShading,
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const CFX_Matrix& parentMatrix)
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: CPDF_Pattern(SHADING,
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pDoc,
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bShading ? nullptr : pPatternObj,
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parentMatrix),
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m_ShadingType(kInvalidShading),
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m_bShadingObj(bShading),
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m_pShadingObj(pPatternObj),
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m_pCS(nullptr),
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m_pCountedCS(nullptr) {
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if (!bShading) {
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CPDF_Dictionary* pDict = m_pPatternObj->GetDict();
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m_Pattern2Form = pDict->GetMatrixBy("Matrix");
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m_pShadingObj = pDict->GetDirectObjectBy("Shading");
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m_Pattern2Form.Concat(parentMatrix);
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}
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}
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CPDF_ShadingPattern::~CPDF_ShadingPattern() {
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CPDF_ColorSpace* pCS = m_pCountedCS ? m_pCountedCS->get() : nullptr;
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if (pCS && m_pDocument)
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m_pDocument->GetPageData()->ReleaseColorSpace(pCS->GetArray());
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}
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CPDF_TilingPattern* CPDF_ShadingPattern::AsTilingPattern() {
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return nullptr;
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}
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CPDF_ShadingPattern* CPDF_ShadingPattern::AsShadingPattern() {
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return this;
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}
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bool CPDF_ShadingPattern::Load() {
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if (m_ShadingType != kInvalidShading)
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return TRUE;
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CPDF_Dictionary* pShadingDict =
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m_pShadingObj ? m_pShadingObj->GetDict() : nullptr;
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if (!pShadingDict)
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return FALSE;
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m_pFunctions.clear();
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CPDF_Object* pFunc = pShadingDict->GetDirectObjectBy("Function");
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if (pFunc) {
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if (CPDF_Array* pArray = pFunc->AsArray()) {
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m_pFunctions.resize(std::min<size_t>(pArray->GetCount(), 4));
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for (size_t i = 0; i < m_pFunctions.size(); ++i)
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m_pFunctions[i] = CPDF_Function::Load(pArray->GetDirectObjectAt(i));
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} else {
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m_pFunctions.push_back(CPDF_Function::Load(pFunc));
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}
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}
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CPDF_Object* pCSObj = pShadingDict->GetDirectObjectBy("ColorSpace");
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if (!pCSObj)
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return FALSE;
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CPDF_DocPageData* pDocPageData = m_pDocument->GetPageData();
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m_pCS = pDocPageData->GetColorSpace(pCSObj, nullptr);
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if (m_pCS)
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m_pCountedCS = pDocPageData->FindColorSpacePtr(m_pCS->GetArray());
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m_ShadingType = ToShadingType(pShadingDict->GetIntegerBy("ShadingType"));
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// We expect to have a stream if our shading type is a mesh.
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if (IsMeshShading() && !ToStream(m_pShadingObj))
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return FALSE;
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return TRUE;
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}
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