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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.
#include <stdint.h>
#include <memory>
#include <tuple>
#include <vector>
#include "core/fpdfapi/page/cpdf_shadingpattern.h"
#include "core/fxcrt/cfx_bitstream.h"
#include "core/fxcrt/retain_ptr.h"
class CPDF_StreamAcc;
class CPDF_MeshVertex {
CPDF_MeshVertex(const CPDF_MeshVertex&);
CFX_PointF position;
float r = 0.0f;
float g = 0.0f;
float b = 0.0f;
class CFX_Matrix;
class CPDF_ColorSpace;
class CPDF_Function;
class CPDF_Stream;
class CPDF_MeshStream {
CPDF_MeshStream(ShadingType type,
const std::vector<std::unique_ptr<CPDF_Function>>& funcs,
const CPDF_Stream* pShadingStream,
const RetainPtr<CPDF_ColorSpace>& pCS);
bool Load();
bool CanReadFlag() const;
bool CanReadCoords() const;
bool CanReadColor() const;
uint32_t ReadFlag();
CFX_PointF ReadCoords();
std::tuple<float, float, float> ReadColor();
bool ReadVertex(const CFX_Matrix& pObject2Bitmap,
CPDF_MeshVertex* vertex,
uint32_t* flag);
std::vector<CPDF_MeshVertex> ReadVertexRow(const CFX_Matrix& pObject2Bitmap,
int count);
CFX_BitStream* BitStream() { return m_BitStream.get(); }
uint32_t ComponentBits() const { return m_nComponentBits; }
uint32_t Components() const { return m_nComponents; }
static constexpr uint32_t kMaxComponents = 8;
const ShadingType m_type;
const std::vector<std::unique_ptr<CPDF_Function>>& m_funcs;
RetainPtr<const CPDF_Stream> const m_pShadingStream;
RetainPtr<CPDF_ColorSpace> const m_pCS;
uint32_t m_nCoordBits = 0;
uint32_t m_nComponentBits = 0;
uint32_t m_nFlagBits = 0;
uint32_t m_nComponents = 0;
uint32_t m_CoordMax = 0;
uint32_t m_ComponentMax = 0;
float m_xmin = 0.0f;
float m_xmax = 0.0f;
float m_ymin = 0.0f;
float m_ymax = 0.0f;
RetainPtr<CPDF_StreamAcc> m_pStream;
std::unique_ptr<CFX_BitStream> m_BitStream;
float m_ColorMin[kMaxComponents] = {};
float m_ColorMax[kMaxComponents] = {};