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Add removeAlpha op, removes alpha channel if any #1248

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Lovell Fuller
2018-08-07 20:32:11 +01:00
parent 25bd2cea3e
commit c14434f9e7
10 changed files with 93 additions and 24 deletions
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7
src/pipeline.cc
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@@ -698,6 +698,12 @@ class PipelineWorker : public Nan::AsyncWorker {
.extract_band(baton->extractChannel)
.copy(VImage::option()->set("interpretation", VIPS_INTERPRETATION_B_W));
}
// Remove alpha channel, if any
if (baton->removeAlpha) {
image = sharp::RemoveAlpha(image);
}
// Convert image to sRGB, if not already
if (sharp::Is16Bit(image.interpretation())) {
image = image.cast(VIPS_FORMAT_USHORT);
@@ -1235,6 +1241,7 @@ NAN_METHOD(pipeline) {
baton->extendLeft = AttrTo<int32_t>(options, "extendLeft");
baton->extendRight = AttrTo<int32_t>(options, "extendRight");
baton->extractChannel = AttrTo<int32_t>(options, "extractChannel");
baton->removeAlpha = AttrTo<bool>(options, "removeAlpha");
if (HasAttr(options, "boolean")) {
baton->boolean = CreateInputDescriptor(AttrAs<v8::Object>(options, "boolean"), buffersToPersist);
baton->booleanOp = sharp::GetBooleanOperation(AttrAsStr(options, "booleanOp"));