/*

 * FreeRDP: A Remote Desktop Protocol Implementation

 * GDI Device Context Functions

 *

 * Copyright 2010-2011 Marc-Andre Moreau <marcandre.moreau@gmail.com>

 * Copyright 2016 Armin Novak <armin.novak@thincast.com>

 * Copyright 2016 Thincast Technologies GmbH

 *

 * Licensed under the Apache License, Version 2.0 (the "License");

 * you may not use this file except in compliance with the License.

 * You may obtain a copy of the License at

 *

 *     http://www.apache.org/licenses/LICENSE-2.0

 *

 * Unless required by applicable law or agreed to in writing, software

 * distributed under the License is distributed on an "AS IS" BASIS,

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

 * See the License for the specific language governing permissions and

 * limitations under the License.

 */

/* Device Context Functions: http://msdn.microsoft.com/en-us/library/dd183554 */

#include <freerdp/config.h>

#include <stdio.h>

#include <stdlib.h>

#include <freerdp/freerdp.h>

#include <freerdp/gdi/gdi.h>

#include <freerdp/gdi/region.h>

#include <freerdp/gdi/dc.h>

/**

 * @brief Get the current device context (a new one is created each time).

 * msdn{dd144871}

 *

 * @return current device context

 */

HGDI_DC gdi_GetDC(void)

{

  HGDI_DC hDC = (HGDI_DC)calloc(1, sizeof(GDI_DC));

  if (!hDC)

    return NULL;

  hDC->format = PIXEL_FORMAT_XRGB32;

  hDC->drawMode = GDI_R2_BLACK;

  hDC->clip = gdi_CreateRectRgn(0, 0, 0, 0);

  if (!hDC->clip)

  {

    free(hDC);

    return NULL;

  }

  hDC->clip->null = TRUE;

  hDC->hwnd = NULL;

  return hDC;

}

/**

 * @brief Create a device context.

 * msdn{dd144871}

 *

 * @return new device context

 */

HGDI_DC gdi_CreateDC(UINT32 format)

{

  HGDI_DC hDC = NULL;

  if (!(hDC = (HGDI_DC)calloc(1, sizeof(GDI_DC))))

    return NULL;

  hDC->drawMode = GDI_R2_BLACK;

  if (!(hDC->clip = gdi_CreateRectRgn(0, 0, 0, 0)))

    goto fail;

  hDC->clip->null = TRUE;

  hDC->hwnd = NULL;

  hDC->format = format;

  if (!(hDC->hwnd = (HGDI_WND)calloc(1, sizeof(GDI_WND))))

    goto fail;

  if (!(hDC->hwnd->invalid = gdi_CreateRectRgn(0, 0, 0, 0)))

    goto fail;

  hDC->hwnd->invalid->null = TRUE;

  hDC->hwnd->count = 32;

  if (!(hDC->hwnd->cinvalid = (HGDI_RGN)calloc(hDC->hwnd->count, sizeof(GDI_RGN))))

    goto fail;

  hDC->hwnd->ninvalid = 0;

  return hDC;

fail:

  gdi_DeleteDC(hDC);

  return NULL;

}

/**

 * @brief Create a new device context compatible with the given device context.

 * msdn{dd183489}

 * @param hdc device context

 * @return new compatible device context

 */

HGDI_DC gdi_CreateCompatibleDC(HGDI_DC hdc)

{

  HGDI_DC hDC = (HGDI_DC)calloc(1, sizeof(GDI_DC));

  if (!hDC)

    return NULL;

  if (!(hDC->clip = gdi_CreateRectRgn(0, 0, 0, 0)))

  {

    free(hDC);

    return NULL;

  }

  hDC->clip->null = TRUE;

  hDC->format = hdc->format;

  hDC->drawMode = hdc->drawMode;

  hDC->hwnd = NULL;

  return hDC;

}

/**

 * @brief Select a GDI object in the current device context.

 * msdn{dd162957}

 *

 * @param hdc device context

 * @param hgdiobject new selected GDI object

 * @return previous selected GDI object

 */

HGDIOBJECT gdi_SelectObject(HGDI_DC hdc, HGDIOBJECT hgdiobject)

{

  HGDIOBJECT previousSelectedObject = hdc->selectedObject;

  if (hgdiobject == NULL)

    return NULL;

  if (hgdiobject->objectType == GDIOBJECT_BITMAP)

  {

    hdc->selectedObject = hgdiobject;

  }

  else if (hgdiobject->objectType == GDIOBJECT_PEN)

  {

    previousSelectedObject = (HGDIOBJECT)hdc->pen;

    hdc->pen = (HGDI_PEN)hgdiobject;

  }

  else if (hgdiobject->objectType == GDIOBJECT_BRUSH)

  {

    previousSelectedObject = (HGDIOBJECT)hdc->brush;

    hdc->brush = (HGDI_BRUSH)hgdiobject;

  }

  else if (hgdiobject->objectType == GDIOBJECT_REGION)

  {

    hdc->selectedObject = hgdiobject;

    previousSelectedObject = (HGDIOBJECT)COMPLEXREGION;

  }

  else if (hgdiobject->objectType == GDIOBJECT_RECT)

  {

    hdc->selectedObject = hgdiobject;

    previousSelectedObject = (HGDIOBJECT)SIMPLEREGION;

  }

  else

  {

    /* Unknown GDI Object Type */

    return NULL;

  }

  return previousSelectedObject;

}

/**

 * @brief Delete a GDI object.

 * msdn{dd183539}

 * @param hgdiobject GDI object

 * @return nonzero if successful, 0 otherwise

 */

BOOL gdi_DeleteObject(HGDIOBJECT hgdiobject)

{

  if (!hgdiobject)

    return FALSE;

  if (hgdiobject->objectType == GDIOBJECT_BITMAP)

  {

    HGDI_BITMAP hBitmap = (HGDI_BITMAP)hgdiobject;

    if (hBitmap->data && hBitmap->free)

    {

      hBitmap->free(hBitmap->data);

      hBitmap->data = NULL;

    }

    free(hBitmap);

  }

  else if (hgdiobject->objectType == GDIOBJECT_PEN)

  {

    HGDI_PEN hPen = (HGDI_PEN)hgdiobject;

    free(hPen);

  }

  else if (hgdiobject->objectType == GDIOBJECT_BRUSH)

  {

    HGDI_BRUSH hBrush = (HGDI_BRUSH)hgdiobject;

    free(hBrush);

  }

  else if (hgdiobject->objectType == GDIOBJECT_REGION)

  {

    free(hgdiobject);

  }

  else if (hgdiobject->objectType == GDIOBJECT_RECT)

  {

    free(hgdiobject);

  }

  else

  {

    /* Unknown GDI Object Type */

    free(hgdiobject);

    return FALSE;

  }

  return TRUE;

}

/**

 * @brief Delete device context.

 * msdn{dd183533}

 * @param hdc device context

 * @return nonzero if successful, 0 otherwise

 */

BOOL gdi_DeleteDC(HGDI_DC hdc)

{

  if (hdc)

  {

    if (hdc->hwnd)

    {

      free(hdc->hwnd->cinvalid);

      free(hdc->hwnd->invalid);

      free(hdc->hwnd);

    }

    free(hdc->clip);

    free(hdc);

  }

  return TRUE;

}