/**

 * FreeRDP: A Remote Desktop Protocol Implementation

 *

 * Copyright 2014 Marc-Andre Moreau <marcandre.moreau@gmail.com>

 *

 * 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.

 */

#ifdef HAVE_CONFIG_H

#include "config.h"

#endif

#include "shadow.h"

#include "shadow_surface.h"

#define ALIGN_SCREEN_SIZE(size, align) ((size + align - 1) & (~(align - 1)))

rdpShadowSurface* shadow_surface_new(rdpShadowServer* server, int x, int y, int width, int height)

{

	rdpShadowSurface* surface;

	surface = (rdpShadowSurface*)calloc(1, sizeof(rdpShadowSurface));

	if (!surface)

		return NULL;

	surface->server = server;

	surface->x = x;

	surface->y = y;

	surface->width = width;

	surface->height = height;

	surface->scanline = ALIGN_SCREEN_SIZE(surface->width, 4) * 4;

	surface->format = PIXEL_FORMAT_BGRX32;

	surface->data = (BYTE*)calloc(ALIGN_SCREEN_SIZE(surface->height, 4), surface->scanline);

	if (!surface->data)

	{

		free(surface);

		return NULL;

	}

	if (!InitializeCriticalSectionAndSpinCount(&(surface->lock), 4000))

	{

		free(surface->data);

		free(surface);

		return NULL;

	}

	region16_init(&(surface->invalidRegion));

	return surface;

}

void shadow_surface_free(rdpShadowSurface* surface)

{

	if (!surface)

		return;

	free(surface->data);

	DeleteCriticalSection(&(surface->lock));

	region16_uninit(&(surface->invalidRegion));

	free(surface);

}

BOOL shadow_surface_resize(rdpShadowSurface* surface, int x, int y, int width, int height)

{

	BYTE* buffer = NULL;

	int scanline = ALIGN_SCREEN_SIZE(width, 4) * 4;

	if (!surface)

		return FALSE;

	if ((width == surface->width) && (height == surface->height))

	{

		/* We don't need to reset frame buffer, just update left top */

		surface->x = x;

		surface->y = y;

		return TRUE;

	}

	buffer = (BYTE*)realloc(surface->data, scanline * ALIGN_SCREEN_SIZE(height, 4));

	if (buffer)

	{

		surface->x = x;

		surface->y = y;

		surface->width = width;

		surface->height = height;

		surface->scanline = scanline;

		surface->data = buffer;

		return TRUE;

	}

	return FALSE;

}