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Add support for bicubic and Nohalo interpolation #41

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Lovell Fuller
2014-06-08 20:46:03 +01:00
parent f0a9d82bf7
commit 4eb910fec9
5 changed files with 110 additions and 6 deletions
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11
src/sharp.cc
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@@ -23,6 +23,7 @@ struct resize_baton {
bool max;
VipsExtend extend;
bool sharpen;
std::string interpolator;
bool progressive;
bool without_enlargement;
VipsAccess access_method;
@@ -294,12 +295,17 @@ class ResizeWorker : public NanAsyncWorker {
}
g_object_unref(shrunk_on_load);
// Use vips_affine with the remaining float part using bilinear interpolation
// Use vips_affine with the remaining float part
VipsImage *affined = vips_image_new();
if (residual != 0) {
if (vips_affine(shrunk, &affined, residual, 0, 0, residual, "interpolate", vips_interpolate_bilinear_static(), NULL)) {
// Create interpolator - "bilinear" (default), "bicubic" or "nohalo"
VipsInterpolate *interpolator = vips_interpolate_new(baton->interpolator.c_str());
// Perform affine transformation
if (vips_affine(shrunk, &affined, residual, 0, 0, residual, "interpolate", interpolator, NULL)) {
g_object_unref(interpolator);
return resize_error(baton, shrunk);
}
g_object_unref(interpolator);
} else {
vips_copy(shrunk, &affined, NULL);
}
@@ -461,6 +467,7 @@ NAN_METHOD(resize) {
}
// Other options
baton->sharpen = options->Get(NanNew<String>("sharpen"))->BooleanValue();
baton->interpolator = *String::Utf8Value(options->Get(NanNew<String>("interpolator"))->ToString());
baton->progressive = options->Get(NanNew<String>("progressive"))->BooleanValue();
baton->without_enlargement = options->Get(NanNew<String>("withoutEnlargement"))->BooleanValue();
baton->access_method = options->Get(NanNew<String>("sequentialRead"))->BooleanValue() ? VIPS_ACCESS_SEQUENTIAL : VIPS_ACCESS_RANDOM;