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JXL/HEIF/AVIF/WebP/PNG Exif data support #213

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merged 9 commits into from
Jun 29, 2023
Merged

JXL/HEIF/AVIF/WebP/PNG Exif data support #213

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7fd982b
support reading jxl exif data
qbnu Jun 19, 2023
0b2a7f0
ignore orientation Exif tags for JXL
qbnu Jun 20, 2023
6fab641
HEIF Exif support
qbnu Jun 21, 2023
2ce3887
ignore all-whitespace Exif comments
qbnu Jun 21, 2023
e1852b2
AVIF Exif data support
qbnu Jun 21, 2023
84eec26
WebP Exif support
qbnu Jun 21, 2023
d029446
better bound checking for HEIF Exif
qbnu Jun 21, 2023
1808e05
PNG eXIf support
qbnu Jun 22, 2023
51487e4
move jxl exif vector to cache
qbnu Jun 23, 2023
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17 changes: 16 additions & 1 deletion src/JPEGView/AVIFWrapper.cpp
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Expand Up @@ -22,6 +22,7 @@ void* AvifReader::ReadImage(int& width,
int frame_index,
int& frame_count,
int& frame_time,
void*& exif_chunk,
bool& outOfMemory,
const void* buffer,
int sizebytes)
Expand All @@ -30,6 +31,7 @@ void* AvifReader::ReadImage(int& width,
width = height = 0;
nchannels = 4;
has_animation = false;
exif_chunk = NULL;

avifResult result;
int nthreads = 256; // sets maximum number of active threads allowed for libavif, default is 1
Expand Down Expand Up @@ -93,9 +95,22 @@ void* AvifReader::ReadImage(int& width,
if (cache.transform == NULL)
cache.transform = ICCProfileTransform::CreateTransform(icc.data, icc.size, ICCProfileTransform::FORMAT_BGRA);
ICCProfileTransform::DoTransform(cache.transform, cache.rgb.pixels, cache.rgb.pixels, width, height);

avifRWData exif = cache.decoder->image->exif;
if (exif.size > 8 && exif.size < 65528 && exif.data != NULL) {
exif_chunk = malloc(exif.size + 10);
if (exif_chunk != NULL) {
memcpy(exif_chunk, "\xFF\xE1\0\0Exif\0\0", 10);
*((unsigned short*)exif_chunk + 1) = _byteswap_ushort(exif.size + 8);
memcpy((uint8_t*)exif_chunk + 10, exif.data, exif.size);
}
}

void* pPixelData = cache.rgb.pixels;
if (!has_animation)
DeleteCache();
return cache.rgb.pixels;

return pPixelData;
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}

void AvifReader::DeleteCache() {
Expand Down
1 change: 1 addition & 0 deletions src/JPEGView/AVIFWrapper.h
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Expand Up @@ -14,6 +14,7 @@ class AvifReader
int frame_index, // index of frame
int& frame_count, // number of frames
int& frame_time, // frame duration in milliseconds
void*& exif_chunk, // Pointer to Exif data (must be freed by caller)
bool& outOfMemory, // set to true when no memory to read image
const void* buffer, // memory address containing jxl compressed data.
int sizebytes); // size of jxl compressed data
Expand Down
4 changes: 2 additions & 2 deletions src/JPEGView/EXIFDisplayCtl.cpp
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Expand Up @@ -121,7 +121,7 @@ void CEXIFDisplayCtl::FillEXIFDataDisplay() {
CRawMetadata* pRawMetaData = CurrentImage()->GetRawMetadata();
if (pEXIFReader != NULL) {
sComment = pEXIFReader->GetUserComment();
if (sComment == NULL || sComment[0] == 0) {
if (sComment == NULL || sComment[0] == 0 || ((std::wstring) sComment).find_first_not_of(L" \t\n\r\f\v", 0) == std::wstring::npos) {
sComment = pEXIFReader->GetImageDescription();
}
if (pEXIFReader->GetAcquisitionTimePresent()) {
Expand Down Expand Up @@ -201,7 +201,7 @@ void CEXIFDisplayCtl::FillEXIFDataDisplay() {
}
}

if (sComment == NULL || sComment[0] == 0) {
if (sComment == NULL || sComment[0] == 0 || ((std::wstring)sComment).find_first_not_of(L" \t\n\r\f\v", 0) == std::wstring::npos) {
sComment = CurrentImage()->GetJPEGComment();
}
if (CSettingsProvider::This().ShowJPEGComments() && sComment != NULL && sComment[0] != 0) {
Expand Down
8 changes: 6 additions & 2 deletions src/JPEGView/EXIFReader.cpp
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Expand Up @@ -241,7 +241,7 @@ bool CEXIFReader::ParseDateString(SYSTEMTIME & date, const CString& str) {
return false;
}

CEXIFReader::CEXIFReader(void* pApp1Block)
CEXIFReader::CEXIFReader(void* pApp1Block, EImageFormat eImageFormat)
: m_exposureTime(0, 0) {

memset(&m_acqDate, 0, sizeof(SYSTEMTIME));
Expand Down Expand Up @@ -297,7 +297,11 @@ CEXIFReader::CEXIFReader(void* pApp1Block)
m_pLastIFD0 = pLastIFD0;

// image orientation
uint8* pTagOrientation = FindTag(pIFD0, pLastIFD0, 0x112, bLittleEndian);
uint8* pTagOrientation = NULL;
// orientation tags must be ignored for JXL, they are taken care of by the decoder
if (eImageFormat != IF_JXL) {
pTagOrientation = FindTag(pIFD0, pLastIFD0, 0x112, bLittleEndian);
}
if (pTagOrientation != NULL) {
m_nImageOrientation = ReadShortTag(pTagOrientation, bLittleEndian);
}
Expand Down
2 changes: 1 addition & 1 deletion src/JPEGView/EXIFReader.h
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Expand Up @@ -38,7 +38,7 @@ class CEXIFReader {
// The pApp1Block must point to the APP1 block of the EXIF data, including the APP1 block marker
// The class does not take ownership of the memory (no copy made), thus the APP1 block must not be deleted
// while the EXIF reader class is deleted.
CEXIFReader(void* pApp1Block);
CEXIFReader(void* pApp1Block, EImageFormat eImageFormat);
~CEXIFReader(void);

// Parse date string in the EXIF date/time format
Expand Down
16 changes: 16 additions & 0 deletions src/JPEGView/HEIFWrapper.cpp
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Expand Up @@ -8,6 +8,7 @@ void * HeifReader::ReadImage(int &width,
int &height,
int &nchannels,
int &frame_count,
void* &exif_chunk,
bool &outOfMemory,
int frame_index,
const void *buffer,
Expand All @@ -18,6 +19,7 @@ void * HeifReader::ReadImage(int &width,
nchannels = 4;

unsigned char* pPixelData = NULL;
exif_chunk = NULL;

heif::Context context;
context.read_from_memory_without_copy(buffer, sizebytes);
Expand Down Expand Up @@ -69,5 +71,19 @@ void * HeifReader::ReadImage(int &width,
}
ICCProfileTransform::DeleteTransform(transform);

std::vector<heif_item_id> exif_blocks = handle.get_list_of_metadata_block_IDs("Exif");

if (!exif_blocks.empty()) {
std::vector<uint8_t> exif = handle.get_metadata(exif_blocks[0]);
if (exif.size() > 8 && exif.size() < 65538) {
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where's the magic 65538 number come from? I see it in other EXIF chunks of the code, where size+some number is 65538. It's an odd number, not a power of 2?

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These libraries all have their own ideas about where to start the Exif data from. JPEG Exif blocks are in the format FF E1 SS SS 45 78 69 66 00 00 [data]. The SS SS is a big-endian unsigned short representing the size of everything after FF E1.

libjxl gives 00 00 00 00 [data], libheif gives 00 00 00 00 45 78 69 66 00 00 [data], libavif, libwebp and libpng give [data], so they have different limits for size. If you want I can change it to 65536 + an offset and add notes explaining why.

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I see, now it makes sense. Regarding the documentation, I'll just refer to this comment. This is good investigative information.

exif_chunk = malloc(exif.size());
if (exif_chunk != NULL) {
memcpy(exif_chunk, exif.data(), exif.size());
*((unsigned short*)exif_chunk) = _byteswap_ushort(0xFFE1);
*((unsigned short*)exif_chunk + 1) = _byteswap_ushort(exif.size() - 2);
}
}
}

return (void*)pPixelData;
}
1 change: 1 addition & 0 deletions src/JPEGView/HEIFWrapper.h
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Expand Up @@ -10,6 +10,7 @@ class HeifReader
int &height, // height of the image loaded.
int &bpp, // BYTES (not bits) PER PIXEL.
int &frame_count, // number of top-level images
void* &exif_chunk, // Pointer to Exif data (must be freed by caller)
bool &outOfMemory, // set to true when no memory to read image
int frame_index, // index of requested frame
const void *buffer, // memory address containing heic compressed data.
Expand Down
30 changes: 20 additions & 10 deletions src/JPEGView/ImageLoadThread.cpp
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Expand Up @@ -638,7 +638,8 @@ void CImageLoadThread::ProcessReadWEBPRequest(CRequest * request) {
int nFrameCount = 1;
int nFrameTimeMs = 0;
int nBPP;
uint8* pPixelData = (uint8*)WebpReaderWriter::ReadImage(nWidth, nHeight, nBPP, bHasAnimation, nFrameCount, nFrameTimeMs, request->OutOfMemory, pBuffer, nFileSize);
void* pEXIFData;
uint8* pPixelData = (uint8*)WebpReaderWriter::ReadImage(nWidth, nHeight, nBPP, bHasAnimation, nFrameCount, nFrameTimeMs, pEXIFData, request->OutOfMemory, pBuffer, nFileSize);
if (pPixelData && nBPP == 4) {
// Multiply alpha value into each AABBGGRR pixel
uint32* pImage32 = (uint32*)pPixelData;
Expand All @@ -648,7 +649,8 @@ void CImageLoadThread::ProcessReadWEBPRequest(CRequest * request) {
if (bHasAnimation) {
m_sLastWebpFileName = sFileName;
}
request->Image = new CJPEGImage(nWidth, nHeight, pPixelData, NULL, nBPP, 0, IF_WEBP, bHasAnimation, request->FrameIndex, nFrameCount, nFrameTimeMs);
request->Image = new CJPEGImage(nWidth, nHeight, pPixelData, pEXIFData, nBPP, 0, IF_WEBP, bHasAnimation, request->FrameIndex, nFrameCount, nFrameTimeMs);
free(pEXIFData);
}
else {
delete[] pPixelData;
Expand Down Expand Up @@ -710,10 +712,11 @@ void CImageLoadThread::ProcessReadPNGRequest(CRequest* request) {
int nWidth, nHeight, nBPP, nFrameCount, nFrameTimeMs;
bool bHasAnimation;
uint8* pPixelData = NULL;
void* pEXIFData;

// If UseEmbeddedColorProfiles is true and the image isn't animated, we should use GDI+ for better color management
if (bUseCachedDecoder || !CSettingsProvider::This().UseEmbeddedColorProfiles() || PngReader::IsAnimated(pBuffer, nFileSize))
pPixelData = (uint8*)PngReader::ReadImage(nWidth, nHeight, nBPP, bHasAnimation, nFrameCount, nFrameTimeMs, request->OutOfMemory, pBuffer, nFileSize);
pPixelData = (uint8*)PngReader::ReadImage(nWidth, nHeight, nBPP, bHasAnimation, nFrameCount, nFrameTimeMs, pEXIFData, request->OutOfMemory, pBuffer, nFileSize);

if (pPixelData != NULL) {
if (bHasAnimation)
Expand All @@ -723,7 +726,8 @@ void CImageLoadThread::ProcessReadPNGRequest(CRequest* request) {
for (int i = 0; i < nWidth * nHeight; i++)
*pImage32++ = WebpAlphaBlendBackground(*pImage32, CSettingsProvider::This().ColorTransparency());

request->Image = new CJPEGImage(nWidth, nHeight, pPixelData, NULL, 4, 0, IF_PNG, bHasAnimation, request->FrameIndex, nFrameCount, nFrameTimeMs);
request->Image = new CJPEGImage(nWidth, nHeight, pPixelData, pEXIFData, 4, 0, IF_PNG, bHasAnimation, request->FrameIndex, nFrameCount, nFrameTimeMs);
free(pEXIFData);
bSuccess = true;
}
else {
Expand Down Expand Up @@ -787,7 +791,8 @@ void CImageLoadThread::ProcessReadJXLRequest(CRequest* request) {
if (bUseCachedDecoder || (::ReadFile(hFile, pBuffer, nFileSize, (LPDWORD)&nNumBytesRead, NULL) && nNumBytesRead == nFileSize)) {
int nWidth, nHeight, nBPP, nFrameCount, nFrameTimeMs;
bool bHasAnimation;
uint8* pPixelData = (uint8*)JxlReader::ReadImage(nWidth, nHeight, nBPP, bHasAnimation, nFrameCount, nFrameTimeMs, request->OutOfMemory, pBuffer, nFileSize);
void* pEXIFData;
uint8* pPixelData = (uint8*)JxlReader::ReadImage(nWidth, nHeight, nBPP, bHasAnimation, nFrameCount, nFrameTimeMs, pEXIFData, request->OutOfMemory, pBuffer, nFileSize);
if (pPixelData != NULL) {
if (bHasAnimation)
m_sLastJxlFileName = sFileName;
Expand All @@ -796,7 +801,8 @@ void CImageLoadThread::ProcessReadJXLRequest(CRequest* request) {
for (int i = 0; i < nWidth * nHeight; i++)
*pImage32++ = WebpAlphaBlendBackground(*pImage32, CSettingsProvider::This().ColorTransparency());

request->Image = new CJPEGImage(nWidth, nHeight, pPixelData, NULL, 4, 0, IF_JXL, bHasAnimation, request->FrameIndex, nFrameCount, nFrameTimeMs);
request->Image = new CJPEGImage(nWidth, nHeight, pPixelData, pEXIFData, 4, 0, IF_JXL, bHasAnimation, request->FrameIndex, nFrameCount, nFrameTimeMs);
free(pEXIFData);
} else {
DeleteCachedJxlDecoder();
}
Expand Down Expand Up @@ -858,8 +864,9 @@ void CImageLoadThread::ProcessReadAVIFRequest(CRequest* request) {
if (bUseCachedDecoder || (::ReadFile(hFile, pBuffer, nFileSize, (LPDWORD)&nNumBytesRead, NULL) && nNumBytesRead == nFileSize)) {
int nWidth, nHeight, nBPP, nFrameCount, nFrameTimeMs;
bool bHasAnimation;
void* pEXIFData;
uint8* pPixelData = (uint8*)AvifReader::ReadImage(nWidth, nHeight, nBPP, bHasAnimation, request->FrameIndex,
nFrameCount, nFrameTimeMs, request->OutOfMemory, pBuffer, nFileSize);
nFrameCount, nFrameTimeMs, pEXIFData, request->OutOfMemory, pBuffer, nFileSize);
if (pPixelData != NULL) {
if (bHasAnimation)
m_sLastAvifFileName = sFileName;
Expand All @@ -868,7 +875,8 @@ void CImageLoadThread::ProcessReadAVIFRequest(CRequest* request) {
for (int i = 0; i < nWidth * nHeight; i++)
*pImage32++ = WebpAlphaBlendBackground(*pImage32, CSettingsProvider::This().ColorTransparency());

request->Image = new CJPEGImage(nWidth, nHeight, pPixelData, NULL, 4, 0, IF_AVIF, bHasAnimation, request->FrameIndex, nFrameCount, nFrameTimeMs);
request->Image = new CJPEGImage(nWidth, nHeight, pPixelData, pEXIFData, 4, 0, IF_AVIF, bHasAnimation, request->FrameIndex, nFrameCount, nFrameTimeMs);
free(pEXIFData);
bSuccess = true;
} else {
DeleteCachedAvifDecoder();
Expand Down Expand Up @@ -920,14 +928,16 @@ void CImageLoadThread::ProcessReadHEIFRequest(CRequest* request) {
int nWidth, nHeight, nBPP, nFrameCount, nFrameTimeMs;
nFrameCount = 1;
nFrameTimeMs = 0;
uint8* pPixelData = (uint8*)HeifReader::ReadImage(nWidth, nHeight, nBPP, nFrameCount, request->OutOfMemory, request->FrameIndex, pBuffer, nFileSize);
void* pEXIFData;
uint8* pPixelData = (uint8*)HeifReader::ReadImage(nWidth, nHeight, nBPP, nFrameCount, pEXIFData, request->OutOfMemory, request->FrameIndex, pBuffer, nFileSize);
if (pPixelData != NULL) {
// Multiply alpha value into each AABBGGRR pixel
uint32* pImage32 = (uint32*)pPixelData;
for (int i = 0; i < nWidth * nHeight; i++)
*pImage32++ = WebpAlphaBlendBackground(*pImage32, CSettingsProvider::This().ColorTransparency());

request->Image = new CJPEGImage(nWidth, nHeight, pPixelData, NULL, nBPP, 0, IF_HEIF, false, request->FrameIndex, nFrameCount, nFrameTimeMs);
request->Image = new CJPEGImage(nWidth, nHeight, pPixelData, pEXIFData, nBPP, 0, IF_HEIF, false, request->FrameIndex, nFrameCount, nFrameTimeMs);
free(pEXIFData);
}
}
} catch(heif::Error he) {
Expand Down
2 changes: 1 addition & 1 deletion src/JPEGView/JPEGImage.cpp
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Expand Up @@ -83,7 +83,7 @@ CJPEGImage::CJPEGImage(int nWidth, int nHeight, void* pPixels, void* pEXIFData,
m_nEXIFSize = pEXIF[2]*256 + pEXIF[3] + 2;
m_pEXIFData = new char[m_nEXIFSize];
memcpy(m_pEXIFData, pEXIFData, m_nEXIFSize);
m_pEXIFReader = new CEXIFReader(m_pEXIFData);
m_pEXIFReader = new CEXIFReader(m_pEXIFData, eImageFormat);
} else {
m_nEXIFSize = 0;
m_pEXIFData = NULL;
Expand Down
42 changes: 42 additions & 0 deletions src/JPEGView/JXLWrapper.cpp
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Expand Up @@ -18,11 +18,13 @@ struct JxlReader::jxl_cache {
int width;
int height;
void* transform;
std::vector<uint8_t> exif;
};

JxlReader::jxl_cache JxlReader::cache = { 0 };

// based on https://github.com/libjxl/libjxl/blob/main/examples/decode_oneshot.cc
// and https://github.com/libjxl/libjxl/blob/main/examples/decode_exif_metadata.cc
bool JxlReader::DecodeJpegXlOneShot(const uint8_t* jxl, size_t size, std::vector<uint8_t>* pixels, int& xsize,
int& ysize, bool& have_animation, int& frame_count, int& frame_time, std::vector<uint8_t>* icc_profile, bool& outOfMemory) {

Expand All @@ -33,11 +35,15 @@ bool JxlReader::DecodeJpegXlOneShot(const uint8_t* jxl, size_t size, std::vector
if (JXL_DEC_SUCCESS !=
JxlDecoderSubscribeEvents(cache.decoder.get(), JXL_DEC_BASIC_INFO |
JXL_DEC_COLOR_ENCODING |
JXL_DEC_BOX |
JXL_DEC_FRAME |
JXL_DEC_FULL_IMAGE)) {
return false;
}

if (JXL_DEC_SUCCESS != JxlDecoderSetDecompressBoxes(cache.decoder.get(), JXL_TRUE)) {
return false;
}

if (JXL_DEC_SUCCESS != JxlDecoderSetParallelRunner(cache.decoder.get(),
JxlResizableParallelRunner,
Expand All @@ -53,6 +59,8 @@ bool JxlReader::DecodeJpegXlOneShot(const uint8_t* jxl, size_t size, std::vector

JxlBasicInfo info;
JxlPixelFormat format = { 4, JXL_TYPE_UINT8, JXL_NATIVE_ENDIAN, 0 };
const constexpr size_t kChunkSize = 65536;
size_t output_pos = 0;

bool loop_check = false;
for (;;) {
Expand Down Expand Up @@ -139,6 +147,26 @@ bool JxlReader::DecodeJpegXlOneShot(const uint8_t* jxl, size_t size, std::vector
JxlDecoderSubscribeEvents(cache.decoder.get(), JXL_DEC_FRAME | JXL_DEC_FULL_IMAGE);
JxlDecoderSetInput(cache.decoder.get(), cache.data, cache.data_size);
JxlDecoderCloseInput(cache.decoder.get());
} else if (status == JXL_DEC_BOX) {
if (!cache.exif.empty()) {
size_t remaining = JxlDecoderReleaseBoxBuffer(cache.decoder.get());
cache.exif.resize(cache.exif.size() - remaining);
} else {
JxlBoxType type;
if (JXL_DEC_SUCCESS !=
JxlDecoderGetBoxType(cache.decoder.get(), type, true)) {
return false;
}
if (!memcmp(type, "Exif", 4)) {
cache.exif.resize(kChunkSize);
JxlDecoderSetBoxBuffer(cache.decoder.get(), cache.exif.data(), cache.exif.size());
}
}
} else if (status == JXL_DEC_BOX_NEED_MORE_OUTPUT) {
size_t remaining = JxlDecoderReleaseBoxBuffer(cache.decoder.get());
output_pos += kChunkSize - remaining;
cache.exif.resize(cache.exif.size() + kChunkSize);
JxlDecoderSetBoxBuffer(cache.decoder.get(), cache.exif.data() + output_pos, cache.exif.size() - output_pos);
} else {
return false;
}
Expand All @@ -151,6 +179,7 @@ void* JxlReader::ReadImage(int& width,
bool& has_animation,
int& frame_count,
int& frame_time,
void*& exif_chunk,
bool& outOfMemory,
const void* buffer,
int sizebytes)
Expand All @@ -160,6 +189,7 @@ void* JxlReader::ReadImage(int& width,
nchannels = 4;
has_animation = false;
unsigned char* pPixelData = NULL;
exif_chunk = NULL;


std::vector<uint8_t> pixels;
Expand All @@ -182,8 +212,20 @@ void* JxlReader::ReadImage(int& width,
for (uint32_t* i = (uint32_t*)pPixelData; (uint8_t*)i < pPixelData + size; i++)
*i = ((*i & 0x00FF0000) >> 16) | ((*i & 0x0000FF00)) | ((*i & 0x000000FF) << 16) | ((*i & 0xFF000000));
}

// Copy Exif data into the format understood by CEXIFReader
if (!cache.exif.empty() && cache.exif.size() > 8 && cache.exif.size() < 65532) {
exif_chunk = malloc(cache.exif.size() + 6);
if (exif_chunk != NULL) {
memcpy(exif_chunk, "\xFF\xE1\0\0Exif\0\0", 10);
*((unsigned short*)exif_chunk + 1) = _byteswap_ushort(cache.exif.size() + 4);
memcpy((uint8_t*)exif_chunk + 10, cache.exif.data() + 4, cache.exif.size() - 4);
}
}

if (!has_animation)
DeleteCache();

return pPixelData;
}

Expand Down
1 change: 1 addition & 0 deletions src/JPEGView/JXLWrapper.h
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Expand Up @@ -13,6 +13,7 @@ class JxlReader
bool& has_animation, // if the image is animated
int& frame_count, // number of frames
int& frame_time, // frame duration in milliseconds
void*& exif, // Pointer to Exif data (must be freed by caller)
bool& outOfMemory, // set to true when no memory to read image
const void* buffer, // memory address containing jxl compressed data.
int sizebytes); // size of jxl compressed data
Expand Down
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