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Add gravity support to embed feature (#1038)

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This commit is contained in:
Kenric D'Souza
2017-12-13 00:59:16 +05:30
committed by Lovell Fuller
parent 1d7a0ea99e
commit 927b77700d
28 changed files with 426 additions and 7 deletions
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20
src/pipeline.cc
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@@ -446,12 +446,25 @@ class PipelineWorker : public Nan::AsyncWorker {
image = image.bandjoin(
VImage::new_matrix(image.width(), image.height()).new_from_image(255 * multiplier));
}
// Embed
int left = static_cast<int>(round((baton->width - image.width()) / 2));
int top = static_cast<int>(round((baton->height - image.height()) / 2));
image = image.embed(left, top, baton->width, baton->height, VImage::option()
// Calculate where to position the embeded image if gravity specified, else center.
int left;
int top;
left = static_cast<int>(round((baton->width - image.width()) / 2));
top = static_cast<int>(round((baton->height - image.height()) / 2));
int width = std::max(image.width(), baton->width);
int height = std::max(image.height(), baton->height);
std::tie(left, top) = sharp::CalculateEmbedPosition(
image.width(), image.height(), baton->width, baton->height, baton->embed);
image = image.embed(left, top, width, height, VImage::option()
->set("extend", VIPS_EXTEND_BACKGROUND)
->set("background", background));
} else if (baton->canvas != Canvas::IGNORE_ASPECT) {
// Crop/max/min
if (baton->crop < 9) {
@@ -1141,6 +1154,7 @@ NAN_METHOD(pipeline) {
// Resize options
baton->withoutEnlargement = AttrTo<bool>(options, "withoutEnlargement");
baton->crop = AttrTo<int32_t>(options, "crop");
baton->embed = AttrTo<int32_t>(options, "embed");
baton->kernel = AttrAsStr(options, "kernel");
baton->fastShrinkOnLoad = AttrTo<bool>(options, "fastShrinkOnLoad");
// Join Channel Options