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Add hasProfile attribute to metadata response

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At the very least will be useful investigating #125
This commit is contained in:
Lovell Fuller 2014-11-24 17:24:29 +00:00
parent 94b47508c0
commit 4e01d63195
3 changed files with 36 additions and 12 deletions
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1
README.md
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@ -234,6 +234,7 @@ Fast access to image metadata without decoding any compressed image data.
* `height`: Number of pixels high
* `space`: Name of colour space interpretation e.g. `srgb`, `rgb`, `scrgb`, `cmyk`, `lab`, `xyz`, `b-w` [...](https://github.com/jcupitt/libvips/blob/master/libvips/iofuncs/enumtypes.c#L522)
* `channels`: Number of bands e.g. `3` for sRGB, `4` for CMYK
* `hasProfile`: Boolean indicating the presence of an embedded ICC profile
* `hasAlpha`: Boolean indicating the presence of an alpha transparency channel
* `orientation`: Number value of the EXIF Orientation header, if present

3
src/metadata.cc
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@ -20,6 +20,7 @@ struct MetadataBaton {
int height;
std::string space;
int channels;
bool hasProfile;
bool hasAlpha;
int orientation;
std::string err;
@ -73,6 +74,7 @@ class MetadataWorker : public NanAsyncWorker {
baton->height = image->Ysize;
baton->space = vips_enum_nick(VIPS_TYPE_INTERPRETATION, image->Type);
baton->channels = image->Bands;
baton->hasProfile = (vips_image_get_typeof(image, VIPS_META_ICC_NAME) > 0) ? TRUE : FALSE;
// Derived attributes
baton->hasAlpha = HasAlpha(image);
baton->orientation = ExifOrientation(image);
@ -99,6 +101,7 @@ class MetadataWorker : public NanAsyncWorker {
info->Set(NanNew<String>("height"), NanNew<Number>(baton->height));
info->Set(NanNew<String>("space"), NanNew<String>(baton->space));
info->Set(NanNew<String>("channels"), NanNew<Number>(baton->channels));
info->Set(NanNew<String>("hasProfile"), NanNew<Boolean>(baton->hasProfile));
info->Set(NanNew<String>("hasAlpha"), NanNew<Boolean>(baton->hasAlpha));
if (baton->orientation > 0) {
info->Set(NanNew<String>("orientation"), NanNew<Number>(baton->orientation));

24
test/unit/metadata.js
View File

@ -18,6 +18,8 @@ describe('Image metadata', function() {
assert.strictEqual(2225, metadata.height);
assert.strictEqual('srgb', metadata.space);
assert.strictEqual(3, metadata.channels);
assert.strictEqual(true, metadata.hasProfile);
assert.strictEqual(false, metadata.hasAlpha);
assert.strictEqual('undefined', typeof metadata.orientation);
done();
});
@ -31,6 +33,7 @@ describe('Image metadata', function() {
assert.strictEqual(600, metadata.height);
assert.strictEqual('srgb', metadata.space);
assert.strictEqual(3, metadata.channels);
assert.strictEqual(true, metadata.hasProfile);
assert.strictEqual(false, metadata.hasAlpha);
assert.strictEqual(8, metadata.orientation);
done();
@ -45,6 +48,7 @@ describe('Image metadata', function() {
assert.strictEqual(3248, metadata.height);
assert.strictEqual('b-w', metadata.space);
assert.strictEqual(1, metadata.channels);
assert.strictEqual(false, metadata.hasProfile);
assert.strictEqual(false, metadata.hasAlpha);
done();
});
@ -58,6 +62,7 @@ describe('Image metadata', function() {
assert.strictEqual(2074, metadata.height);
assert.strictEqual('b-w', metadata.space);
assert.strictEqual(1, metadata.channels);
assert.strictEqual(false, metadata.hasProfile);
assert.strictEqual(false, metadata.hasAlpha);
done();
});
@ -71,6 +76,7 @@ describe('Image metadata', function() {
assert.strictEqual(1536, metadata.height);
assert.strictEqual('srgb', metadata.space);
assert.strictEqual(4, metadata.channels);
assert.strictEqual(false, metadata.hasProfile);
assert.strictEqual(true, metadata.hasAlpha);
done();
});
@ -84,6 +90,7 @@ describe('Image metadata', function() {
assert.strictEqual(772, metadata.height);
assert.strictEqual('srgb', metadata.space);
assert.strictEqual(3, metadata.channels);
assert.strictEqual(false, metadata.hasProfile);
assert.strictEqual(false, metadata.hasAlpha);
done();
});
@ -96,6 +103,7 @@ describe('Image metadata', function() {
assert.strictEqual(800, metadata.width);
assert.strictEqual(533, metadata.height);
assert.strictEqual(3, metadata.channels);
assert.strictEqual(false, metadata.hasProfile);
assert.strictEqual(false, metadata.hasAlpha);
done();
});
@ -108,6 +116,7 @@ describe('Image metadata', function() {
assert.strictEqual(2225, metadata.height);
assert.strictEqual('srgb', metadata.space);
assert.strictEqual(3, metadata.channels);
assert.strictEqual(true, metadata.hasProfile);
assert.strictEqual(false, metadata.hasAlpha);
done();
});
@ -122,6 +131,7 @@ describe('Image metadata', function() {
assert.strictEqual(2225, metadata.height);
assert.strictEqual('srgb', metadata.space);
assert.strictEqual(3, metadata.channels);
assert.strictEqual(true, metadata.hasProfile);
assert.strictEqual(false, metadata.hasAlpha);
done();
}).catch(function(err) {
@ -139,6 +149,7 @@ describe('Image metadata', function() {
assert.strictEqual(2225, metadata.height);
assert.strictEqual('srgb', metadata.space);
assert.strictEqual(3, metadata.channels);
assert.strictEqual(true, metadata.hasProfile);
assert.strictEqual(false, metadata.hasAlpha);
done();
});
@ -154,6 +165,7 @@ describe('Image metadata', function() {
assert.strictEqual(2225, metadata.height);
assert.strictEqual('srgb', metadata.space);
assert.strictEqual(3, metadata.channels);
assert.strictEqual(true, metadata.hasProfile);
assert.strictEqual(false, metadata.hasAlpha);
image.resize(metadata.width / 2).toBuffer(function(err, data, info) {
if (err) throw err;
@ -166,10 +178,14 @@ describe('Image metadata', function() {
});
it('Keep EXIF metadata after a resize', function(done) {
sharp(fixtures.inputJpgWithExif).resize(320, 240).withMetadata().toBuffer(function(err, buffer) {
sharp(fixtures.inputJpgWithExif)
.resize(320, 240)
.withMetadata()
.toBuffer(function(err, buffer) {
if (err) throw err;
sharp(buffer).metadata(function(err, metadata) {
if (err) throw err;
assert.strictEqual(true, metadata.hasProfile);
assert.strictEqual(8, metadata.orientation);
done();
});
@ -177,10 +193,14 @@ describe('Image metadata', function() {
});
it('Remove EXIF metadata after a resize', function(done) {
sharp(fixtures.inputJpgWithExif).resize(320, 240).withMetadata(false).toBuffer(function(err, buffer) {
sharp(fixtures.inputJpgWithExif)
.resize(320, 240)
.withMetadata(false)
.toBuffer(function(err, buffer) {
if (err) throw err;
sharp(buffer).metadata(function(err, metadata) {
if (err) throw err;
assert.strictEqual(false, metadata.hasProfile);
assert.strictEqual('undefined', typeof metadata.orientation);
done();
});