chromium/third_party/pdfium/core/fpdfapi/page/cpdf_function.cpp

// Copyright 2017 The PDFium Authors
// 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/page/cpdf_function.h"

#include <algorithm>
#include <utility>
#include <vector>

#include "core/fpdfapi/page/cpdf_expintfunc.h"
#include "core/fpdfapi/page/cpdf_psfunc.h"
#include "core/fpdfapi/page/cpdf_sampledfunc.h"
#include "core/fpdfapi/page/cpdf_stitchfunc.h"
#include "core/fpdfapi/parser/cpdf_array.h"
#include "core/fpdfapi/parser/cpdf_dictionary.h"
#include "core/fpdfapi/parser/cpdf_stream.h"
#include "core/fpdfapi/parser/fpdf_parser_utility.h"
#include "core/fxcrt/containers/contains.h"
#include "core/fxcrt/fx_safe_types.h"
#include "core/fxcrt/scoped_set_insertion.h"
#include "core/fxcrt/stl_util.h"

namespace {

CPDF_Function::Type IntegerToFunctionType(int iType) { … }

}  // namespace

// static
std::unique_ptr<CPDF_Function> CPDF_Function::Load(
    RetainPtr<const CPDF_Object> pFuncObj) { … }

// static
std::unique_ptr<CPDF_Function> CPDF_Function::Load(
    RetainPtr<const CPDF_Object> pFuncObj,
    VisitedSet* pVisited) { … }

CPDF_Function::CPDF_Function(Type type) : … { … }

CPDF_Function::~CPDF_Function() = default;

bool CPDF_Function::Init(const CPDF_Object* pObj, VisitedSet* pVisited) { … }

std::optional<uint32_t> CPDF_Function::Call(pdfium::span<const float> inputs,
                                            pdfium::span<float> results) const { … }

// See PDF Reference 1.7, page 170.
float CPDF_Function::Interpolate(float x,
                                 float xmin,
                                 float xmax,
                                 float ymin,
                                 float ymax) const { … }

#if defined(PDF_USE_SKIA)
const CPDF_SampledFunc* CPDF_Function::ToSampledFunc() const { … }

const CPDF_ExpIntFunc* CPDF_Function::ToExpIntFunc() const { … }

const CPDF_StitchFunc* CPDF_Function::ToStitchFunc() const { … }
#endif  // defined(PDF_USE_SKIA)