/**

 * 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 */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#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>

/**

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

 * @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;

}

/**

 * Create a device context.\n

 * @msdn{dd144871}

 * @return new device context

 */

HGDI_DC gdi_CreateDC(UINT32 format)

{

	HGDI_DC hDC;

	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;

}

/**

 * Create a new device context compatible with the given device context.\n

 * @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;

}

/**

 * Select a GDI object in the current device context.\n

 * @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;

}

/**

 * Delete a GDI object.\n

 * @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;

}

/**

 * Delete device context.\n

 * @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;

}