53 lines
1.5 KiB
Plaintext
53 lines
1.5 KiB
Plaintext
#include "closure.h"
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#include "Canvas.h"
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#ifdef HAVE_JPEG
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void JpegClosure::init_destination(j_compress_ptr cinfo) {
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JpegClosure* closure = (JpegClosure*)cinfo->client_data;
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closure->vec.resize(PAGE_SIZE);
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closure->jpeg_dest_mgr->next_output_byte = &closure->vec[0];
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closure->jpeg_dest_mgr->free_in_buffer = closure->vec.size();
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}
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boolean JpegClosure::empty_output_buffer(j_compress_ptr cinfo) {
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JpegClosure* closure = (JpegClosure*)cinfo->client_data;
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size_t currentSize = closure->vec.size();
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closure->vec.resize(currentSize * 1.5);
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closure->jpeg_dest_mgr->next_output_byte = &closure->vec[currentSize];
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closure->jpeg_dest_mgr->free_in_buffer = closure->vec.size() - currentSize;
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return true;
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}
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void JpegClosure::term_destination(j_compress_ptr cinfo) {
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JpegClosure* closure = (JpegClosure*)cinfo->client_data;
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size_t finalSize = closure->vec.size() - closure->jpeg_dest_mgr->free_in_buffer;
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closure->vec.resize(finalSize);
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}
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#endif
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void
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EncodingWorker::Init(void (*work_fn)(Closure*), Closure* closure) {
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this->work_fn = work_fn;
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this->closure = closure;
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}
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void
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EncodingWorker::Execute() {
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this->work_fn(this->closure);
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}
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void
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EncodingWorker::OnWorkComplete(Napi::Env env, napi_status status) {
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Napi::HandleScope scope(env);
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if (closure->status) {
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closure->cb.Call({ closure->canvas->CairoError(closure->status).Value() });
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} else {
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Napi::Object buf = Napi::Buffer<uint8_t>::Copy(env, &closure->vec[0], closure->vec.size());
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closure->cb.Call({ env.Null(), buf });
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}
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closure->canvas->Unref();
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delete closure;
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}
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