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Add ensureAlpha op, adds alpha channel if missing #1153

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Lovell Fuller
2019-01-05 21:12:33 +00:00
parent 8e70579e47
commit 4c01a099ea
9 changed files with 84 additions and 0 deletions
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6
src/pipeline.cc
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@@ -677,6 +677,11 @@ class PipelineWorker : public Nan::AsyncWorker {
image = sharp::RemoveAlpha(image);
}
// Ensure alpha channel, if missing
if (baton->ensureAlpha) {
image = sharp::EnsureAlpha(image);
}
// Convert image to sRGB, if not already
if (sharp::Is16Bit(image.interpretation())) {
image = image.cast(VIPS_FORMAT_USHORT);
@@ -1236,6 +1241,7 @@ NAN_METHOD(pipeline) {
baton->extractChannel = AttrTo<int32_t>(options, "extractChannel");
baton->removeAlpha = AttrTo<bool>(options, "removeAlpha");
baton->ensureAlpha = AttrTo<bool>(options, "ensureAlpha");
if (HasAttr(options, "boolean")) {
baton->boolean = CreateInputDescriptor(AttrAs<v8::Object>(options, "boolean"), buffersToPersist);
baton->booleanOp = sharp::GetBooleanOperation(AttrAsStr(options, "booleanOp"));