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Expose libvips centre option, mimics *magick +0.5px convention

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This commit is contained in:
Lovell Fuller
2016-11-04 18:16:16 +00:00
parent deb978bf57
commit 9911863441
9 changed files with 201 additions and 163 deletions
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11
src/pipeline.cc
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@@ -388,10 +388,16 @@ class PipelineWorker : public Nan::AsyncWorker {
throw vips::VError("Unknown kernel");
}
if (yresidual < 1.0) {
image = image.reducev(1.0 / yresidual, VImage::option()->set("kernel", kernel));
image = image.reducev(1.0 / yresidual, VImage::option()
->set("kernel", kernel)
->set("centre", baton->centreSampling)
);
}
if (xresidual < 1.0) {
image = image.reduceh(1.0 / xresidual, VImage::option()->set("kernel", kernel));
image = image.reduceh(1.0 / xresidual, VImage::option()
->set("kernel", kernel)
->set("centre", baton->centreSampling)
);
}
}
// Perform affine enlargement
@@ -1063,6 +1069,7 @@ NAN_METHOD(pipeline) {
baton->crop = AttrTo<int32_t>(options, "crop");
baton->kernel = AttrAsStr(options, "kernel");
baton->interpolator = AttrAsStr(options, "interpolator");
baton->centreSampling = AttrTo<bool>(options, "centreSampling");
// Join Channel Options
if(HasAttr(options, "joinChannelIn")) {
v8::Local<v8::Object> joinChannelObject = Nan::Get(options, Nan::New("joinChannelIn").ToLocalChecked())

2
src/pipeline.h
View File

@@ -50,6 +50,7 @@ struct PipelineBaton {
int cropCalcTop;
std::string kernel;
std::string interpolator;
bool centreSampling;
double background[4];
bool flatten;
bool negate;
@@ -119,6 +120,7 @@ struct PipelineBaton {
crop(0),
cropCalcLeft(-1),
cropCalcTop(-1),
centreSampling(false),
flatten(false),
negate(false),
blurSigma(0.0),