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Public Member Functions | Static Public Member Functions | List of all members
SkTiffImageFileDirectory Class Reference

#include <SkTiffUtility.h>

Public Member Functions

uint16_t getNumEntries () const
 
uint32_t nextIfdOffset () const
 
uint16_t getEntryTag (uint16_t entryIndex) const
 
bool getEntryUnsignedShort (uint16_t entryIndex, uint32_t count, uint16_t *values) const
 
bool getEntryUnsignedLong (uint16_t entryIndex, uint32_t count, uint32_t *values) const
 
bool getEntrySignedRational (uint16_t entryIndex, uint32_t count, float *values) const
 
bool getEntryUnsignedRational (uint16_t entryIndex, uint32_t count, float *values) const
 
sk_sp< SkData > getEntryUndefinedData (uint16_t entryIndex) const
 

Static Public Member Functions

static bool ParseHeader (const SkData *data, bool *outLittleEndian, uint32_t *outIfdOffset)
 
static std::unique_ptr< SkTiffImageFileDirectory > MakeFromOffset (sk_sp< SkData > data, bool littleEndian, uint32_t ifdOffset)
 

Detailed Description

Definition at line 22 of file SkTiffUtility.h.

Member Function Documentation

◆ getEntrySignedRational()

bool SkTiffImageFileDirectory::getEntrySignedRational ( uint16_t  entryIndex,
uint32_t  count,
float *  values 
) const
inline

Definition at line 65 of file SkTiffUtility.h.

65 {
66 return getEntryValuesGeneric(entryIndex, kTypeSignedRational, count, values);
67 }
count
int count
Definition FontMgrTest.cpp:50

◆ getEntryTag()

uint16_t SkTiffImageFileDirectory::getEntryTag ( uint16_t  entryIndex) const

Definition at line 158 of file SkTiffUtility.cpp.

158 {
159 const uint8_t* entry = get_entry_address(fData.get(), fOffset, entryIndex);
160 return get_endian_short(entry, fLittleEndian);
161}
get_endian_short
static uint16_t get_endian_short(const uint8_t *data, bool littleEndian)
Definition SkCodecPriv.h:194
get_entry_address
static const uint8_t * get_entry_address(const SkData *data, uint32_t ifdOffset, uint16_t entryIndex)
Definition SkTiffUtility.cpp:53
sk_sp::get
T * get() const
Definition SkRefCnt.h:303

◆ getEntryUndefinedData()

sk_sp< SkData > SkTiffImageFileDirectory::getEntryUndefinedData ( uint16_t  entryIndex) const

Definition at line 208 of file SkTiffUtility.cpp.

208 {
209 uint16_t type = 0;
210 uint32_t count = 0;
211 const uint8_t* data = nullptr;
212 size_t size = 0;
213 if (!getEntryRawData(entryIndex, nullptr, &type, &count, &data, &size)) {
214 return nullptr;
215 }
216 if (type != kTypeUndefined) {
217 return nullptr;
218 }
219 return SkData::MakeSubset(fData.get(), data - fData->bytes(), size);
220}
SkData::bytes
const uint8_t * bytes() const
Definition SkData.h:43
SkData::MakeSubset
static sk_sp< SkData > MakeSubset(const SkData *src, size_t offset, size_t length)
Definition SkData.cpp:173
type
uint8_t type
Definition fl_standard_message_codec_test.cc:1115
flutter::data
DEF_SWITCHES_START aot vmservice shared library Name of the *so containing AOT compiled Dart assets for launching the service isolate vm snapshot data
Definition switches.h:41
flutter::size
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Definition switches.h:259

◆ getEntryUnsignedLong()

bool SkTiffImageFileDirectory::getEntryUnsignedLong ( uint16_t  entryIndex,
uint32_t  count,
uint32_t *  values 
) const
inline

Definition at line 62 of file SkTiffUtility.h.

62 {
63 return getEntryValuesGeneric(entryIndex, kTypeUnsignedLong, count, values);
64 }

◆ getEntryUnsignedRational()

bool SkTiffImageFileDirectory::getEntryUnsignedRational ( uint16_t  entryIndex,
uint32_t  count,
float *  values 
) const
inline

Definition at line 68 of file SkTiffUtility.h.

68 {
69 return getEntryValuesGeneric(entryIndex, kTypeUnsignedRational, count, values);
70 }

◆ getEntryUnsignedShort()

bool SkTiffImageFileDirectory::getEntryUnsignedShort ( uint16_t  entryIndex,
uint32_t  count,
uint16_t *  values 
) const
inline

Definition at line 59 of file SkTiffUtility.h.

59 {
60 return getEntryValuesGeneric(entryIndex, kTypeUnsignedShort, count, values);
61 }

◆ getNumEntries()

uint16_t SkTiffImageFileDirectory::getNumEntries ( ) const
inline

Definition at line 42 of file SkTiffUtility.h.

42{ return fNumEntries; }

◆ MakeFromOffset()

std::unique_ptr< SkTiffImageFileDirectory > SkTiffImageFileDirectory::MakeFromOffset ( sk_sp< SkData >  data,
bool  littleEndian,
uint32_t  ifdOffset 
)
static

Definition at line 135 of file SkTiffUtility.cpp.

136 {
137 uint16_t numEntries = 0;
138 uint32_t nextOffset = 0;
139 if (!validate_ifd(data.get(), littleEndian, ifdOffset, &numEntries, &nextOffset)) {
140 SkCodecPrintf("Failed to validate IFD.\n");
141 return nullptr;
142 }
143 return std::unique_ptr<SkTiffImageFileDirectory>(new SkTiffImageFileDirectory(
144 std::move(data), littleEndian, ifdOffset, numEntries, nextOffset));
145}
SkCodecPrintf
#define SkCodecPrintf(...)
Definition SkCodecPriv.h:23
validate_ifd
static bool validate_ifd(const SkData *data, bool littleEndian, uint32_t ifdOffset, uint16_t *outNumEntries, uint32_t *outNextIfdOffset)
Definition SkTiffUtility.cpp:64

◆ nextIfdOffset()

uint32_t SkTiffImageFileDirectory::nextIfdOffset ( ) const
inline

Definition at line 47 of file SkTiffUtility.h.

47{ return fNextIfdOffset; }

◆ ParseHeader()

bool SkTiffImageFileDirectory::ParseHeader ( const SkData *  data,
bool *  outLittleEndian,
uint32_t *  outIfdOffset 
)
static

Definition at line 115 of file SkTiffUtility.cpp.

117 {
118 // Read the endianness (4 bytes) and IFD offset (4 bytes).
119 if (data->size() < 8) {
120 SkCodecPrintf("Tiff header must be at least 8 bytes.\n");
121 return false;
122 }
123 if (!is_valid_endian_marker(data->bytes(), outLittleEndian)) {
124 SkCodecPrintf("Tiff header had invalid endian marker 0x%x,0x%x,0x%x,0x%x.\n",
125 data->bytes()[0],
126 data->bytes()[1],
127 data->bytes()[2],
128 data->bytes()[3]);
129 return false;
130 }
131 *outIfdOffset = get_endian_int(data->bytes() + 4, *outLittleEndian);
132 return true;
133}
get_endian_int
static uint32_t get_endian_int(const uint8_t *data, bool littleEndian)
Definition SkCodecPriv.h:202
is_valid_endian_marker
static bool is_valid_endian_marker(const uint8_t *data, bool *isLittleEndian)
Definition SkCodecPriv.h:184
The documentation for this class was generated from the following files:
Generated on Fri Apr 26 2024 06:20:22 for Flutter Engine by doxygen 1.9.8