DecodeBufferWorker::DecodeBufferWorker(
NanCallback * callback,
Local<Object> & buff,
buf_dec_f_t decoder
): NanAsyncWorker(callback), _decoder(decoder), _pixbuf(NULL), _width(0),
_height(0), _channels(0), _trans(false), _metadata("") {
SaveToPersistent("buff", buff); // make sure buff isn't GC'ed
_buffer = Buffer::Data(buff);
_buffsize = Buffer::Length(buff);
}
BufferWorker(
NanCallback *callback
, int milliseconds
, v8::Local<v8::Object> &bufferHandle
)
: NanAsyncWorker(callback), milliseconds(milliseconds) {
NanScope();
SaveToPersistent("buffer", bufferHandle);
}
PasteWorker::PasteWorker(
size_t left,
size_t top,
Local<Object> & pixbuf,
size_t width,
size_t height,
CImg<unsigned char> * cimg,
NanCallback * callback
): NanAsyncWorker(callback), _left(left), _top(top), _width(width),
_height(height), _cimg(cimg) {
SaveToPersistent("pixbuf", pixbuf);
_pixels = (unsigned char *) Buffer::Data(pixbuf);
}
EncodeToGifBufferWorker::EncodeToGifBufferWorker(
Local<Object> & buff,
size_t width,
size_t height,
int cmapSize,
int colors,
bool interlaced,
bool trans,
int threshold,
Nan::Callback * callback
): Nan::AsyncWorker(callback), _width(width), _height(height),
_cmapSize(cmapSize), _colors(colors), _interlaced(interlaced), _trans(trans),
_threshold(threshold), _gifbuf(NULL), _gifbufsize(0) {
SaveToPersistent("buff", buff); // make sure buff isn't GC'ed
_pixbuf = (unsigned char *) Buffer::Data(buff);
if (_trans){
// make room in the color table for a transparent color
if (_cmapSize == 256){
if (_colors == 256) _colors--;
} else if (_cmapSize == _colors){
_cmapSize *= 2;
}
}
}
