Mathis/sharp
1
0
Fork 0
mirror of https://github.com/lovell/sharp.git synced 2025-12-19 07:15:08 +01:00
Code Issues Packages Projects Releases Wiki Activity

Expose levels metadata for multi-level images #2222

Browse Source
This commit is contained in:
Lovell Fuller
2020-06-04 20:29:02 +01:00
parent f8144dd89c
commit 760550ca0d
5 changed files with 26 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
src/metadata.cc
View File

@@ -74,6 +74,15 @@ class MetadataWorker : public Napi::AsyncWorker {
if (image.get_typeof("heif-primary") == G_TYPE_INT) {
baton->pagePrimary = image.get_int("heif-primary");
}
if (image.get_typeof("openslide.level-count") == VIPS_TYPE_REF_STRING) {
int const levels = std::stoi(image.get_string("openslide.level-count"));
for (int l = 0; l < levels; l++) {
std::string prefix = "openslide.level[" + std::to_string(l) + "].";
int const width = std::stoi(image.get_string((prefix + "width").data()));
int const height = std::stoi(image.get_string((prefix + "height").data()));
baton->levels.push_back(std::pair<int, int>(width, height));
}
}
baton->hasProfile = sharp::HasProfile(image);
// Derived attributes
baton->hasAlpha = sharp::HasAlpha(image);
@@ -177,6 +186,17 @@ class MetadataWorker : public Napi::AsyncWorker {
if (baton->pagePrimary > -1) {
info.Set("pagePrimary", baton->pagePrimary);
}
if (!baton->levels.empty()) {
int i = 0;
Napi::Array levels = Napi::Array::New(env, static_cast<size_t>(baton->levels.size()));
for (std::pair<int, int> const l : baton->levels) {
Napi::Object level = Napi::Object::New(env);
level.Set("width", l.first);
level.Set("height", l.second);
levels.Set(i++, level);
}
info.Set("levels", levels);
}
info.Set("hasProfile", baton->hasProfile);
info.Set("hasAlpha", baton->hasAlpha);
if (baton->orientation > 0) {

1
src/metadata.h
View File

@@ -39,6 +39,7 @@ struct MetadataBaton {
int loop;
std::vector<int> delay;
int pagePrimary;
std::vector<std::pair<int, int>> levels;
bool hasProfile;
bool hasAlpha;
int orientation;