99 lines
No EOL
2.8 KiB
C++
99 lines
No EOL
2.8 KiB
C++
#include <Magick++.h>
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#include <napi.h>
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#include <iostream>
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#include <list>
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#include <string_view>
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using namespace std;
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using namespace Magick;
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template <typename T>
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constexpr auto type_name() noexcept {
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std::string_view name = "Error: unsupported compiler", prefix, suffix;
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#ifdef __clang__
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name = __PRETTY_FUNCTION__;
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prefix = "auto type_name() [T = ";
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suffix = "]";
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#elif defined(__GNUC__)
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name = __PRETTY_FUNCTION__;
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prefix = "constexpr auto type_name() [with T = ";
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suffix = "]";
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#elif defined(_MSC_VER)
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name = __FUNCSIG__;
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prefix = "auto __cdecl type_name<";
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suffix = ">(void) noexcept";
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#endif
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name.remove_prefix(prefix.size());
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name.remove_suffix(suffix.size());
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return name;
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}
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Napi::Value Uncaption(const Napi::CallbackInfo &info) {
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Napi::Env env = info.Env();
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try {
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Napi::Object obj = info[0].As<Napi::Object>();
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Napi::Buffer<char> data = obj.Get("data").As<Napi::Buffer<char>>();
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string type = obj.Get("type").As<Napi::String>().Utf8Value();
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int delay =
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obj.Has("delay") ? obj.Get("delay").As<Napi::Number>().Int32Value() : 0;
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Blob blob;
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list<Image> frames;
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list<Image> coalesced;
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list<Image> mid;
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readImages(&frames, Blob(data.Data(), data.Length()));
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coalesceImages(&coalesced, frames.begin(), frames.end());
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Image firstImage = coalesced.front();
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ssize_t columns = firstImage.columns();
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ssize_t rows = firstImage.rows();
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//ssize_t column;
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ssize_t row;
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//bool found = false;
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for (row = 0; row < rows; ++row) {
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//for (column = 0; column < columns; ++column) {
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ColorGray color = firstImage.pixelColor(0, row);
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if (color.shade() < 0.9765625) {
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//found = true;
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break;
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}
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//}
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//if (found) break;
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}
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Geometry geom = Geometry(columns, row == rows ? rows : rows - row, 0,
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row == rows ? 0 : row);
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for (Image &image : coalesced) {
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image.virtualPixelMethod(Magick::TransparentVirtualPixelMethod);
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image.backgroundColor("none");
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image.extent(geom);
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image.magick(type);
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mid.push_back(image);
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}
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optimizeTransparency(mid.begin(), mid.end());
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if (type == "gif") {
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for (Image &image : mid) {
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image.quantizeDither(false);
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image.quantize();
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if (delay != 0) image.animationDelay(delay);
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}
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}
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writeImages(mid.begin(), mid.end(), &blob);
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Napi::Object result = Napi::Object::New(env);
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result.Set("data", Napi::Buffer<char>::Copy(env, (char *)blob.data(),
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blob.length()));
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result.Set("type", type);
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return result;
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} catch (std::exception const &err) {
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throw Napi::Error::New(env, err.what());
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} catch (...) {
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throw Napi::Error::New(env, "Unknown error");
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}
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} |