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Increase control over output metadata (#3856)

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Add withX and keepX functions to take advantage of
libvips 8.15.0 new 'keep' metadata feature.
This commit is contained in:
Lovell Fuller
2023-11-22 09:03:57 +00:00
committed by GitHub
parent 3f7313d031
commit e78200cc84
13 changed files with 694 additions and 179 deletions
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49
src/common.cc
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@@ -531,7 +531,33 @@ namespace sharp {
Does this image have an embedded profile?
*/
bool HasProfile(VImage image) {
return (image.get_typeof(VIPS_META_ICC_NAME) != 0) ? TRUE : FALSE;
return image.get_typeof(VIPS_META_ICC_NAME) == VIPS_TYPE_BLOB;
}
/*
Get copy of embedded profile.
*/
std::pair<char*, size_t> GetProfile(VImage image) {
std::pair<char*, size_t> icc(nullptr, 0);
if (HasProfile(image)) {
size_t length;
const void *data = image.get_blob(VIPS_META_ICC_NAME, &length);
icc.first = static_cast<char*>(g_malloc(length));
icc.second = length;
memcpy(icc.first, data, length);
}
return icc;
}
/*
Set embedded profile.
*/
VImage SetProfile(VImage image, std::pair<char*, size_t> icc) {
if (icc.first != nullptr) {
image = image.copy();
image.set(VIPS_META_ICC_NAME, reinterpret_cast<VipsCallbackFn>(vips_area_free_cb), icc.first, icc.second);
}
return image;
}
/*
@@ -542,6 +568,27 @@ namespace sharp {
return image.has_alpha();
}
static void* RemoveExifCallback(VipsImage *image, char const *field, GValue *value, void *data) {
std::vector<std::string> *fieldNames = static_cast<std::vector<std::string> *>(data);
std::string fieldName(field);
if (fieldName.substr(0, 8) == ("exif-ifd")) {
fieldNames->push_back(fieldName);
}
return nullptr;
}
/*
Remove all EXIF-related image fields.
*/
VImage RemoveExif(VImage image) {
std::vector<std::string> fieldNames;
vips_image_map(image.get_image(), static_cast<VipsImageMapFn>(RemoveExifCallback), &fieldNames);
for (const auto& f : fieldNames) {
image.remove(f.data());
}
return image;
}
/*
Get EXIF Orientation of image, if any.
*/