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Allow separate parameters for gamma encoding and decoding (#1439)

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Daiz
2018-11-11 11:15:38 +02:00
committed by Lovell Fuller
parent 1fa388370e
commit a48f8fbb61
8 changed files with 41 additions and 5 deletions
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5
src/pipeline.cc
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@@ -612,8 +612,8 @@ class PipelineWorker : public Nan::AsyncWorker {
baton->premultiplied = shouldPremultiplyAlpha;
// Gamma decoding (brighten)
if (baton->gamma >= 1 && baton->gamma <= 3) {
image = sharp::Gamma(image, baton->gamma);
if (baton->gammaOut >= 1 && baton->gammaOut <= 3) {
image = sharp::Gamma(image, baton->gammaOut);
}
// Linear adjustment (a * in + b)
@@ -1193,6 +1193,7 @@ NAN_METHOD(pipeline) {
baton->thresholdGrayscale = AttrTo<bool>(options, "thresholdGrayscale");
baton->trimThreshold = AttrTo<double>(options, "trimThreshold");
baton->gamma = AttrTo<double>(options, "gamma");
baton->gammaOut = AttrTo<double>(options, "gammaOut");
baton->linearA = AttrTo<double>(options, "linearA");
baton->linearB = AttrTo<double>(options, "linearB");
baton->greyscale = AttrTo<bool>(options, "greyscale");

1
src/pipeline.h
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@@ -87,6 +87,7 @@ struct PipelineBaton {
double linearA;
double linearB;
double gamma;
double gammaOut;
bool greyscale;
bool normalise;
bool useExifOrientation;