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Port crop

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Essem 2022-02-22 21:21:06 -06:00
parent 8b59e70fe5
commit 9e4cdd7120
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1 changed files with 34 additions and 37 deletions
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natives/crop.cc
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@ -1,11 +1,11 @@
#include <Magick++.h>
#include <napi.h> #include <napi.h>
#include <iostream> #include <iostream>
#include <list> #include <list>
#include <vips/vips8>
using namespace std; using namespace std;
using namespace Magick; using namespace vips;
Napi::Value Crop(const Napi::CallbackInfo &info) { Napi::Value Crop(const Napi::CallbackInfo &info) {
Napi::Env env = info.Env(); Napi::Env env = info.Env();
@ -17,49 +17,46 @@ Napi::Value Crop(const Napi::CallbackInfo &info) {
int delay = int delay =
obj.Has("delay") ? obj.Get("delay").As<Napi::Number>().Int32Value() : 0; obj.Has("delay") ? obj.Get("delay").As<Napi::Number>().Int32Value() : 0;
Blob blob; VOption *options = VImage::option()->set("access", "sequential");
list<Image> frames; VImage in =
list<Image> coalesced; VImage::new_from_buffer(data.Data(), data.Length(), "",
list<Image> mid; type == "gif" ? options->set("n", -1) : options)
try { .colourspace(VIPS_INTERPRETATION_sRGB);
readImages(&frames, Blob(data.Data(), data.Length()));
} catch (Magick::WarningCoder &warning) {
cerr << "Coder Warning: " << warning.what() << endl;
} catch (Magick::Warning &warning) {
cerr << "Warning: " << warning.what() << endl;
}
coalesceImages(&coalesced, frames.begin(), frames.end());
for (Image &image : coalesced) { int width = in.width();
image.extent(Geometry(to_string(image.columns() / image.rows() >= 1 int page_height = vips_image_get_page_height(in.get_image());
? image.rows() int n_pages = vips_image_get_n_pages(in.get_image());
: image.columns()) +
"x"), vector<VImage> img;
Magick::CenterGravity); int finalHeight = 0;
image.extent(Geometry("x" + to_string(image.columns() / image.rows() <= 1 for (int i = 0; i < n_pages; i++) {
? image.columns() VImage img_frame =
: image.rows())), type == "gif" ? in.crop(0, i * page_height, width, page_height) : in;
Magick::CenterGravity); int frameWidth = img_frame.width();
image.magick(type); int frameHeight = img_frame.height();
mid.push_back(image); bool widthOrHeight = frameWidth / frameHeight >= 1;
int size = widthOrHeight ? frameHeight : frameWidth;
//img_frame.crop(frameWidth - size, frameHeight - size, size, size);
VImage result = img_frame.smartcrop(size, size, VImage::option()->set("interesting", VIPS_INTERESTING_CENTRE));
finalHeight = size;
img.push_back(result);
} }
optimizeTransparency(mid.begin(), mid.end()); VImage final = VImage::arrayjoin(img, VImage::option()->set("across", 1));
final.set(VIPS_META_PAGE_HEIGHT, finalHeight);
if (delay) final.set("delay", delay);
if (type == "gif") { void *buf;
for (Image &image : mid) { size_t length;
image.quantizeDither(false); final.write_to_buffer(
image.quantize(); ("." + type).c_str(), &buf, &length,
if (delay != 0) image.animationDelay(delay); type == "gif" ? VImage::option()->set("dither", 0) : 0);
}
}
writeImages(mid.begin(), mid.end(), &blob); vips_thread_shutdown();
Napi::Object result = Napi::Object::New(env); Napi::Object result = Napi::Object::New(env);
result.Set("data", Napi::Buffer<char>::Copy(env, (char *)blob.data(), result.Set("data", Napi::Buffer<char>::Copy(env, (char *)buf, length));
blob.length()));
result.Set("type", type); result.Set("type", type);
return result; return result;
} catch (std::exception const &err) { } catch (std::exception const &err) {