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Add support for negating only non-alpha channels

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Fixes #1035
This commit is contained in:
Espen Hovlandsdal
2021-07-22 23:27:27 +02:00
committed by Lovell Fuller
parent 21d1a7ca62
commit b7ddbe71f7
14 changed files with 122 additions and 6 deletions
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3
src/pipeline.cc
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@@ -327,7 +327,7 @@ class PipelineWorker : public Napi::AsyncWorker {
// Negate the colours in the image
if (baton->negate) {
image = image.invert();
image = sharp::Negate(image, baton->negateAlpha);
}
// Gamma encoding (darken)
@@ -1320,6 +1320,7 @@ Napi::Value pipeline(const Napi::CallbackInfo& info) {
baton->flatten = sharp::AttrAsBool(options, "flatten");
baton->flattenBackground = sharp::AttrAsVectorOfDouble(options, "flattenBackground");
baton->negate = sharp::AttrAsBool(options, "negate");
baton->negateAlpha = sharp::AttrAsBool(options, "negateAlpha");
baton->blurSigma = sharp::AttrAsDouble(options, "blurSigma");
baton->brightness = sharp::AttrAsDouble(options, "brightness");
baton->saturation = sharp::AttrAsDouble(options, "saturation");