core/fxge/win32/cpsoutput.cpp

// Copyright 2016 PDFium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com

#include "core/fxge/win32/cpsoutput.h"

#include <algorithm>

#include "core/fxcrt/fx_system.h"

CPSOutput::CPSOutput(HDC hDC) {
  m_hDC = hDC;
}

CPSOutput::~CPSOutput() {}

void CPSOutput::Release() {
  delete this;
}

void CPSOutput::OutputPS(const FX_CHAR* str, int len) {
  if (len < 0)
    len = static_cast<int>(FXSYS_strlen(str));

  int sent_len = 0;
  while (len > 0) {
    FX_CHAR buffer[1026];
    int send_len = std::min(len, 1024);
    *(reinterpret_cast<uint16_t*>(buffer)) = send_len;
    FXSYS_memcpy(buffer + 2, str + sent_len, send_len);

    // TODO(thestig/rbpotter): Do PASSTHROUGH for non-Chromium usage.
    // ExtEscape(m_hDC, PASSTHROUGH, send_len + 2, buffer, 0, nullptr);
    ::GdiComment(m_hDC, send_len + 2, reinterpret_cast<const BYTE*>(buffer));
    sent_len += send_len;
    len -= send_len;
  }
}