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cjpx_decoder.h
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1// Copyright 2017 The PDFium Authors
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#ifndef CORE_FXCODEC_JPX_CJPX_DECODER_H_
8#define CORE_FXCODEC_JPX_CJPX_DECODER_H_
9
10#include <stdint.h>
11
12#include <memory>
13
14#include "core/fxcrt/unowned_ptr.h"
15#include "third_party/base/containers/span.h"
16
17#if defined(USE_SYSTEM_LIBOPENJPEG2)
18#include <openjpeg.h>
19#else
20#include "third_party/libopenjpeg/openjpeg.h"
21#endif
22
23namespace fxcodec {
24
25struct DecodeData;
26
28 public:
29 // Calculated as log2(2^32 / 1), where 2^32 is the largest image dimension and
30 // 1 is the smallest required size.
31 static constexpr uint8_t kMaxResolutionsToSkip = 32;
32
38
39 struct JpxImageInfo {
40 uint32_t width;
41 uint32_t height;
42 uint32_t channels;
43 COLOR_SPACE colorspace;
44 };
45
47 pdfium::span<const uint8_t> src_span,
49 uint8_t resolution_levels_to_skip);
50
51 static void Sycc420ToRgbForTesting(opj_image_t* img);
52
53 ~CJPX_Decoder();
54
55 JpxImageInfo GetInfo() const;
56 bool StartDecode();
57
58 // `swap_rgb` can only be set when an image's color space type contains at
59 // least 3 color components. Note that this `component_count` is not
60 // equivalent to `JpxImageInfo::channels`. The JpxImageInfo channels can
61 // contain extra information for rendering the image besides the color
62 // component information. Therefore the `JpxImageInfo::channels` must be no
63 // less than the component count.
64 //
65 // Example: If a JPX image's color space type is OPJ_CLRSPC_SRGB, the
66 // component count for this color space is 3, and the channel count of its
67 // JpxImageInfo can be 4. This is because the extra channel might contain
68 // extra information, such as the transparency level of the image.
69 bool Decode(pdfium::span<uint8_t> dest_buf,
70 uint32_t pitch,
71 bool swap_rgb,
72 uint32_t component_count);
73
74 private:
75 // Use Create() to instantiate.
76 explicit CJPX_Decoder(ColorSpaceOption option);
77
78 bool Init(pdfium::span<const uint8_t> src_data,
79 uint8_t resolution_levels_to_skip);
80
81 const ColorSpaceOption m_ColorSpaceOption;
82 pdfium::span<const uint8_t> m_SrcData;
83 UnownedPtr<opj_image_t> m_Image;
84 UnownedPtr<opj_codec_t> m_Codec;
85 std::unique_ptr<DecodeData> m_DecodeData;
86 UnownedPtr<opj_stream_t> m_Stream;
87 opj_dparameters_t m_Parameters = {};
88};
89
90} // namespace fxcodec
91
92using fxcodec::CJPX_Decoder;
93
94#endif // CORE_FXCODEC_JPX_CJPX_DECODER_H_
bool HasPalette() const
Definition cfx_dibbase.h:62
FXDIB_Format m_Format
void SetPaletteArgb(int index, uint32_t color)
Family GetFamily() const
static uint32_t ComponentsForFamily(Family family)
static RetainPtr< CPDF_ColorSpace > GetStockCS(Family family)
~CPDF_DIB() override
RetainPtr< CPDF_DIB > DetachMask()
Definition cpdf_dib.cpp:881
size_t GetEstimatedImageMemoryBurden() const override
uint32_t GetMatteColor() const
Definition cpdf_dib.h:53
bool SkipToScanline(int line, PauseIndicatorIface *pPause) const override
bool IsJBigImage() const
Definition cpdf_dib.cpp:885
RetainPtr< CPDF_ColorSpace > GetColorSpace() const
Definition cpdf_dib.h:52
LoadState ContinueLoadDIBBase(PauseIndicatorIface *pPause)
Definition cpdf_dib.cpp:315
bool Load()
Definition cpdf_dib.cpp:224
pdfium::span< const uint8_t > GetScanline(int line) const override
LoadState StartLoadDIBBase(bool bHasMask, const CPDF_Dictionary *pFormResources, const CPDF_Dictionary *pPageResources, bool bStdCS, CPDF_ColorSpace::Family GroupFamily, bool bLoadMask, const CFX_Size &max_size_required)
Definition cpdf_dib.cpp:269
static bool IsValidJpegBitsPerComponent(int32_t bpc)
static bool IsValidJpegComponent(int32_t comps)
int GetMaxIndex() const
static DataVector< uint8_t > RunLengthEncode(pdfium::span< const uint8_t > src_span)
static std::unique_ptr< ScanlineDecoder > CreateRunLengthDecoder(pdfium::span< const uint8_t > src_buf, int width, int height, int nComps, int bpc)
BasicModule & operator=(const BasicModule &)=delete
BasicModule(const BasicModule &)=delete
static DataVector< uint8_t > A85Encode(pdfium::span< const uint8_t > src_span)
static void Sycc420ToRgbForTesting(opj_image_t *img)
static constexpr uint8_t kMaxResolutionsToSkip
static std::unique_ptr< CJPX_Decoder > Create(pdfium::span< const uint8_t > src_span, CJPX_Decoder::ColorSpaceOption option, uint8_t resolution_levels_to_skip)
bool Decode(pdfium::span< uint8_t > dest_buf, uint32_t pitch, bool swap_rgb, uint32_t component_count)
JpxImageInfo GetInfo() const
static bool IsValidIccComponents(int components)
pdfium::span< const uint8_t > m_pSrcSpan
pdfium::span< const uint8_t > m_pGlobalSpan
std::unique_ptr< CJBig2_Context > m_pContext
UNOWNED_PTR_EXCLUSION uint8_t * m_dest_buf
static FXCODEC_STATUS StartDecode(Jbig2Context *pJbig2Context, JBig2_DocumentContext *pJbig2DocumentContext, uint32_t width, uint32_t height, pdfium::span< const uint8_t > src_span, uint64_t src_key, pdfium::span< const uint8_t > global_span, uint64_t global_key, pdfium::span< uint8_t > dest_buf, uint32_t dest_pitch, PauseIndicatorIface *pPause)
static FXCODEC_STATUS ContinueDecode(Jbig2Context *pJbig2Context, PauseIndicatorIface *pPause)
Jbig2Decoder(const Jbig2Decoder &)=delete
Jbig2Decoder & operator=(const Jbig2Decoder &)=delete
JpegModule & operator=(const JpegModule &)=delete
static absl::optional< ImageInfo > LoadInfo(pdfium::span< const uint8_t > src_span)
static std::unique_ptr< ScanlineDecoder > CreateDecoder(pdfium::span< const uint8_t > src_span, uint32_t width, uint32_t height, int nComps, bool ColorTransform)
JpegModule(const JpegModule &)=delete
bool operator==(const char *ptr) const
bool IsEmpty() const
Definition bytestring.h:119
bool operator!=(const char *ptr) const
Definition bytestring.h:130
constexpr size_t kHugeImageSize
Definition cpdf_dib.h:39
FXCODEC_STATUS
#define FXARGB_B(argb)
Definition fx_dib.h:127
#define FXARGB_G(argb)
Definition fx_dib.h:126
FXDIB_Format MakeRGBFormat(int bpp)
Definition fx_dib.cpp:23
constexpr FX_ARGB ArgbEncode(uint32_t a, uint32_t r, uint32_t g, uint32_t b)
Definition fx_dib.h:118
#define FXARGB_R(argb)
Definition fx_dib.h:125
FXDIB_Format
Definition fx_dib.h:19
int FXSYS_roundf(float f)
Definition fx_system.cpp:92
#define CHECK(cvref)
#define CONSTRUCT_VIA_MAKE_RETAIN
Definition retain_ptr.h:224
float m_DecodeStep
Definition cpdf_dib.h:29
int m_ColorKeyMin
Definition cpdf_dib.h:30
int m_ColorKeyMax
Definition cpdf_dib.h:31
float m_DecodeMin
Definition cpdf_dib.h:28
#define UNOWNED_PTR_EXCLUSION