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// Copyright 2016 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 "core/fpdfapi/fpdf_page/cpdf_shadingpattern.h"
#include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
#include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h"
#include "core/fpdfapi/fpdf_parser/include/cpdf_document.h"
#include "core/fpdfapi/fpdf_parser/include/cpdf_object.h"
namespace {
ShadingType ToShadingType(int type) {
return (type > static_cast<int>(kInvalidShading) &&
type < static_cast<int>(kMaxShading))
? static_cast<ShadingType>(type)
: kInvalidShading;
}
} // namespace
CPDF_ShadingPattern::CPDF_ShadingPattern(CPDF_Document* pDoc,
CPDF_Object* pPatternObj,
FX_BOOL bShading,
const CFX_Matrix* parentMatrix)
: CPDF_Pattern(SHADING,
pDoc,
bShading ? nullptr : pPatternObj,
parentMatrix),
m_ShadingType(kInvalidShading),
m_bShadingObj(bShading),
m_pShadingObj(pPatternObj),
m_pCS(nullptr),
m_pCountedCS(nullptr),
m_nFuncs(0) {
if (!bShading) {
CPDF_Dictionary* pDict = m_pPatternObj->GetDict();
m_Pattern2Form = pDict->GetMatrixBy("Matrix");
m_pShadingObj = pDict->GetElementValue("Shading");
if (parentMatrix)
m_Pattern2Form.Concat(*parentMatrix);
}
for (int i = 0; i < FX_ArraySize(m_pFunctions); ++i)
m_pFunctions[i] = nullptr;
}
CPDF_ShadingPattern::~CPDF_ShadingPattern() {
for (int i = 0; i < m_nFuncs; ++i)
delete m_pFunctions[i];
CPDF_ColorSpace* pCS = m_pCountedCS ? m_pCountedCS->get() : nullptr;
if (pCS && m_pDocument)
m_pDocument->GetPageData()->ReleaseColorSpace(pCS->GetArray());
}
FX_BOOL CPDF_ShadingPattern::Load() {
if (m_ShadingType != kInvalidShading)
return TRUE;
CPDF_Dictionary* pShadingDict =
m_pShadingObj ? m_pShadingObj->GetDict() : nullptr;
if (!pShadingDict)
return FALSE;
if (m_nFuncs) {
for (int i = 0; i < m_nFuncs; i++)
delete m_pFunctions[i];
m_nFuncs = 0;
}
CPDF_Object* pFunc = pShadingDict->GetElementValue("Function");
if (pFunc) {
if (CPDF_Array* pArray = pFunc->AsArray()) {
m_nFuncs = std::min<int>(pArray->GetCount(), 4);
for (int i = 0; i < m_nFuncs; i++)
m_pFunctions[i] = CPDF_Function::Load(pArray->GetElementValue(i));
} else {
m_pFunctions[0] = CPDF_Function::Load(pFunc);
m_nFuncs = 1;
}
}
CPDF_Object* pCSObj = pShadingDict->GetElementValue("ColorSpace");
if (!pCSObj)
return FALSE;
CPDF_DocPageData* pDocPageData = m_pDocument->GetPageData();
m_pCS = pDocPageData->GetColorSpace(pCSObj, nullptr);
if (m_pCS)
m_pCountedCS = pDocPageData->FindColorSpacePtr(m_pCS->GetArray());
m_ShadingType = ToShadingType(pShadingDict->GetIntegerBy("ShadingType"));
// We expect to have a stream if our shading type is a mesh.
if (IsMeshShading() && !ToStream(m_pShadingObj))
return FALSE;
return TRUE;
}
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