text: /**
   * FreeRDP: A Remote Desktop Protocol Implementation
   * GDI Graphics Pipeline
   *
   * Copyright 2014 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.
   */
  
  #ifdef HAVE_CONFIG_H
  #include "config.h"
  #endif
  
  #include "../core/update.h"
  
  #include <freerdp/log.h>
  #include <freerdp/gdi/gfx.h>
  #include <freerdp/gdi/region.h>
  
  #define TAG FREERDP_TAG("gdi")
  
  static DWORD gfx_align_scanline(DWORD widthInBytes, DWORD alignment)
  {
  	const UINT32 align = alignment;
  	const UINT32 pad = align - (widthInBytes % alignment);
  	UINT32 scanline = widthInBytes;
  
  	if (align != pad)
  		scanline += pad;
  
  	return scanline;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_ResetGraphics(RdpgfxClientContext* context,
                                const RDPGFX_RESET_GRAPHICS_PDU* resetGraphics)
  {
  	UINT rc = ERROR_INTERNAL_ERROR;
  	UINT32 index;
  	UINT16 count;
  	UINT32 DesktopWidth;
  	UINT32 DesktopHeight;
  	gdiGfxSurface* surface;
  	UINT16* pSurfaceIds = NULL;
  	rdpGdi* gdi = (rdpGdi*)context->custom;
  	rdpUpdate* update = gdi->context->update;
  	rdpSettings* settings = gdi->context->settings;
  	EnterCriticalSection(&context->mux);
  	DesktopWidth = resetGraphics->width;
  	DesktopHeight = resetGraphics->height;
  
  	if ((DesktopWidth != settings->DesktopWidth) || (DesktopHeight != settings->DesktopHeight))
  	{
  		settings->DesktopWidth = DesktopWidth;
  		settings->DesktopHeight = DesktopHeight;
  
  		if (update)
  			update->DesktopResize(gdi->context);
  	}
  
  	context->GetSurfaceIds(context, &pSurfaceIds, &count);
  
  	for (index = 0; index < count; index++)
  	{
  		surface = (gdiGfxSurface*)context->GetSurfaceData(context, pSurfaceIds[index]);
  
  		if (!surface || !surface->outputMapped)
  			continue;
  
  		region16_clear(&surface->invalidRegion);
  	}
  
  	free(pSurfaceIds);
  
  	if (!freerdp_client_codecs_reset(gdi->context->codecs, FREERDP_CODEC_ALL, gdi->width,
  	                                 gdi->height))
  		goto fail;
  
  	rc = CHANNEL_RC_OK;
  fail:
  	LeaveCriticalSection(&context->mux);
  	return rc;
  }
  
  static UINT gdi_OutputUpdate(rdpGdi* gdi, gdiGfxSurface* surface)
  {
  	UINT rc = ERROR_INTERNAL_ERROR;
  	UINT32 surfaceX, surfaceY;
  	RECTANGLE_16 surfaceRect;
  	const RECTANGLE_16* rects;
  	UINT32 i, nbRects;
  	double sx, sy;
  	rdpUpdate* update = gdi->context->update;
  
  	if (gdi->suppressOutput)
  		return CHANNEL_RC_OK;
  
  	surfaceX = surface->outputOriginX;
  	surfaceY = surface->outputOriginY;
  	surfaceRect.left = 0;
  	surfaceRect.top = 0;
  	surfaceRect.right = surface->mappedWidth;
  	surfaceRect.bottom = surface->mappedHeight;
  	region16_intersect_rect(&(surface->invalidRegion), &(surface->invalidRegion), &surfaceRect);
  	sx = surface->outputTargetWidth / (double)surface->mappedWidth;
  	sy = surface->outputTargetHeight / (double)surface->mappedHeight;
  
  	if (!(rects = region16_rects(&surface->invalidRegion, &nbRects)) || !nbRects)
  		return CHANNEL_RC_OK;
  
  	if (!update_begin_paint(update))
  		goto fail;
  
  	for (i = 0; i < nbRects; i++)
  	{
  		const UINT32 nXSrc = rects[i].left;
  		const UINT32 nYSrc = rects[i].top;
  		const UINT32 nXDst = (UINT32)MIN(surfaceX + nXSrc * sx, gdi->width - 1);
  		const UINT32 nYDst = (UINT32)MIN(surfaceY + nYSrc * sy, gdi->height - 1);
  		const UINT32 swidth = rects[i].right - rects[i].left;
  		const UINT32 sheight = rects[i].bottom - rects[i].top;
  		const UINT32 dwidth = MIN((UINT32)(swidth * sx), (UINT32)gdi->width - nXDst);
  		const UINT32 dheight = MIN((UINT32)(sheight * sy), (UINT32)gdi->height - nYDst);
  
  		if (!freerdp_image_scale(gdi->primary_buffer, gdi->dstFormat, gdi->stride, nXDst, nYDst,
  		                         dwidth, dheight, surface->data, surface->format, surface->scanline,
  		                         nXSrc, nYSrc, swidth, sheight))
  			return CHANNEL_RC_NULL_DATA;
  
  		gdi_InvalidateRegion(gdi->primary->hdc, (INT32)nXDst, (INT32)nYDst, (INT32)dwidth,
  		                     (INT32)dheight);
  	}
  
  	rc = CHANNEL_RC_OK;
  fail:
  
  	if (!update_end_paint(update))
  		rc = ERROR_INTERNAL_ERROR;
  
  	region16_clear(&(surface->invalidRegion));
  	return rc;
  }
  
  static UINT gdi_UpdateSurfaces(RdpgfxClientContext* context)
  {
  	UINT16 count;
  	UINT16 index;
  	UINT status = ERROR_INTERNAL_ERROR;
  	gdiGfxSurface* surface;
  	UINT16* pSurfaceIds = NULL;
  	rdpGdi* gdi = (rdpGdi*)context->custom;
  
  	EnterCriticalSection(&context->mux);
  	context->GetSurfaceIds(context, &pSurfaceIds, &count);
  	status = CHANNEL_RC_OK;
  
  	for (index = 0; index < count; index++)
  	{
  		surface = (gdiGfxSurface*)context->GetSurfaceData(context, pSurfaceIds[index]);
  
  		if (!surface)
  			continue;
  
  		/* Already handled in UpdateSurfaceArea callbacks */
  		if (context->UpdateSurfaceArea)
  		{
  			if (surface->windowId != 0)
  				continue;
  		}
  
  		if (!surface->outputMapped)
  			continue;
  
  		status = gdi_OutputUpdate(gdi, surface);
  
  		if (status != CHANNEL_RC_OK)
  			break;
  	}
  
  	free(pSurfaceIds);
  	LeaveCriticalSection(&context->mux);
  	return status;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_StartFrame(RdpgfxClientContext* context, const RDPGFX_START_FRAME_PDU* startFrame)
  {
  	rdpGdi* gdi = (rdpGdi*)context->custom;
  	gdi->inGfxFrame = TRUE;
  	return CHANNEL_RC_OK;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_EndFrame(RdpgfxClientContext* context, const RDPGFX_END_FRAME_PDU* endFrame)
  {
  	UINT status = CHANNEL_RC_NOT_INITIALIZED;
  	rdpGdi* gdi = (rdpGdi*)context->custom;
  	IFCALLRET(context->UpdateSurfaces, status, context);
  	gdi->inGfxFrame = FALSE;
  	return status;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_SurfaceCommand_Uncompressed(rdpGdi* gdi, RdpgfxClientContext* context,
                                              const RDPGFX_SURFACE_COMMAND* cmd)
  {
  	UINT status = CHANNEL_RC_OK;
  	gdiGfxSurface* surface;
  	RECTANGLE_16 invalidRect;
  	surface = (gdiGfxSurface*)context->GetSurfaceData(context, cmd->surfaceId);
  
  	if (!surface)
  	{
  		WLog_ERR(TAG, "%s: unable to retrieve surfaceData for surfaceId=%" PRIu32 "", __FUNCTION__,
  		         cmd->surfaceId);
  		return ERROR_NOT_FOUND;
  	}
  
  	if (!freerdp_image_copy(surface->data, surface->format, surface->scanline, cmd->left, cmd->top,
  	                        cmd->width, cmd->height, cmd->data, cmd->format, 0, 0, 0, NULL,
  	                        FREERDP_FLIP_NONE))
  		return ERROR_INTERNAL_ERROR;
  
  	invalidRect.left = cmd->left;
  	invalidRect.top = cmd->top;
  	invalidRect.right = cmd->right;
  	invalidRect.bottom = cmd->bottom;
  	region16_union_rect(&(surface->invalidRegion), &(surface->invalidRegion), &invalidRect);
  	status = IFCALLRESULT(CHANNEL_RC_OK, context->UpdateSurfaceArea, context, surface->surfaceId, 1,
  	                      &invalidRect);
  
  	if (status != CHANNEL_RC_OK)
  		goto fail;
  
  	if (!gdi->inGfxFrame)
  	{
  		status = CHANNEL_RC_NOT_INITIALIZED;
  		IFCALLRET(context->UpdateSurfaces, status, context);
  	}
  
  fail:
  	return status;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_SurfaceCommand_RemoteFX(rdpGdi* gdi, RdpgfxClientContext* context,
                                          const RDPGFX_SURFACE_COMMAND* cmd)
  {
  	UINT status = ERROR_INTERNAL_ERROR;
  	gdiGfxSurface* surface;
  	REGION16 invalidRegion;
  	const RECTANGLE_16* rects;
  	UINT32 nrRects, x;
  	surface = (gdiGfxSurface*)context->GetSurfaceData(context, cmd->surfaceId);
  
  	if (!surface)
  	{
  		WLog_ERR(TAG, "%s: unable to retrieve surfaceData for surfaceId=%" PRIu32 "", __FUNCTION__,
  		         cmd->surfaceId);
  		return ERROR_NOT_FOUND;
  	}
  
  	rfx_context_set_pixel_format(surface->codecs->rfx, cmd->format);
  	region16_init(&invalidRegion);
  
  	if (!rfx_process_message(surface->codecs->rfx, cmd->data, cmd->length, cmd->left, cmd->top,
  	                         surface->data, surface->format, surface->scanline, surface->height,
  	                         &invalidRegion))
  	{
  		WLog_ERR(TAG, "Failed to process RemoteFX message");
  		goto fail;
  	}
  
  	rects = region16_rects(&invalidRegion, &nrRects);
  	status = IFCALLRESULT(CHANNEL_RC_OK, context->UpdateSurfaceArea, context, surface->surfaceId,
  	                      nrRects, rects);
  
  	if (status != CHANNEL_RC_OK)
  		goto fail;
  
  	for (x = 0; x < nrRects; x++)
  		region16_union_rect(&surface->invalidRegion, &surface->invalidRegion, &rects[x]);
  
  	if (!gdi->inGfxFrame)
  	{
  		status = CHANNEL_RC_NOT_INITIALIZED;
  		IFCALLRET(context->UpdateSurfaces, status, context);
  	}
  
  fail:
  	region16_uninit(&invalidRegion);
  	return status;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_SurfaceCommand_ClearCodec(rdpGdi* gdi, RdpgfxClientContext* context,
                                            const RDPGFX_SURFACE_COMMAND* cmd)
  {
  	INT32 rc;
  	UINT status = CHANNEL_RC_OK;
  	gdiGfxSurface* surface;
  	RECTANGLE_16 invalidRect;
  	surface = (gdiGfxSurface*)context->GetSurfaceData(context, cmd->surfaceId);
  
  	if (!surface)
  	{
  		WLog_ERR(TAG, "%s: unable to retrieve surfaceData for surfaceId=%" PRIu32 "", __FUNCTION__,
  		         cmd->surfaceId);
  		return ERROR_NOT_FOUND;
  	}
  
  	rc = clear_decompress(surface->codecs->clear, cmd->data, cmd->length, cmd->width, cmd->height,
  	                      surface->data, surface->format, surface->scanline, cmd->left, cmd->top,
  	                      surface->width, surface->height, &gdi->palette);
  
  	if (rc < 0)
  	{
  		WLog_ERR(TAG, "clear_decompress failure: %" PRId32 "", rc);
  		return ERROR_INTERNAL_ERROR;
  	}
  
  	invalidRect.left = cmd->left;
  	invalidRect.top = cmd->top;
  	invalidRect.right = cmd->right;
  	invalidRect.bottom = cmd->bottom;
  	region16_union_rect(&(surface->invalidRegion), &(surface->invalidRegion), &invalidRect);
  	status = IFCALLRESULT(CHANNEL_RC_OK, context->UpdateSurfaceArea, context, surface->surfaceId, 1,
  	                      &invalidRect);
  
  	if (status != CHANNEL_RC_OK)
  		goto fail;
  
  	if (!gdi->inGfxFrame)
  	{
  		status = CHANNEL_RC_NOT_INITIALIZED;
  		IFCALLRET(context->UpdateSurfaces, status, context);
  	}
  
  fail:
  	return status;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_SurfaceCommand_Planar(rdpGdi* gdi, RdpgfxClientContext* context,
                                        const RDPGFX_SURFACE_COMMAND* cmd)
  {
  	UINT status = CHANNEL_RC_OK;
  	BYTE* DstData = NULL;
  	gdiGfxSurface* surface;
  	RECTANGLE_16 invalidRect;
  	surface = (gdiGfxSurface*)context->GetSurfaceData(context, cmd->surfaceId);
  
  	if (!surface)
  	{
  		WLog_ERR(TAG, "%s: unable to retrieve surfaceData for surfaceId=%" PRIu32 "", __FUNCTION__,
  		         cmd->surfaceId);
  		return ERROR_NOT_FOUND;
  	}
  
  	DstData = surface->data;
  
  	if (!planar_decompress(surface->codecs->planar, cmd->data, cmd->length, cmd->width, cmd->height,
  	                       DstData, surface->format, surface->scanline, cmd->left, cmd->top,
  	                       cmd->width, cmd->height, FALSE))
  		return ERROR_INTERNAL_ERROR;
  
  	invalidRect.left = cmd->left;
  	invalidRect.top = cmd->top;
  	invalidRect.right = cmd->right;
  	invalidRect.bottom = cmd->bottom;
  	region16_union_rect(&(surface->invalidRegion), &(surface->invalidRegion), &invalidRect);
  	status = IFCALLRESULT(CHANNEL_RC_OK, context->UpdateSurfaceArea, context, surface->surfaceId, 1,
  	                      &invalidRect);
  
  	if (status != CHANNEL_RC_OK)
  		goto fail;
  
  	if (!gdi->inGfxFrame)
  	{
  		status = CHANNEL_RC_NOT_INITIALIZED;
  		IFCALLRET(context->UpdateSurfaces, status, context);
  	}
  
  fail:
  	return status;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_SurfaceCommand_AVC420(rdpGdi* gdi, RdpgfxClientContext* context,
                                        const RDPGFX_SURFACE_COMMAND* cmd)
  {
  #ifdef WITH_GFX_H264
  	INT32 rc;
  	UINT status = CHANNEL_RC_OK;
  	UINT32 i;
  	gdiGfxSurface* surface;
  	RDPGFX_H264_METABLOCK* meta;
  	RDPGFX_AVC420_BITMAP_STREAM* bs;
  
  	surface = (gdiGfxSurface*)context->GetSurfaceData(context, cmd->surfaceId);
  
  	if (!surface)
  	{
  		WLog_ERR(TAG, "%s: unable to retrieve surfaceData for surfaceId=%" PRIu32 "", __FUNCTION__,
  		         cmd->surfaceId);
  		return ERROR_NOT_FOUND;
  	}
  
  	if (!surface->h264)
  	{
  		surface->h264 = h264_context_new(FALSE);
  
  		if (!surface->h264)
  		{
  			WLog_ERR(TAG, "%s: unable to create h264 context", __FUNCTION__);
  			return ERROR_NOT_ENOUGH_MEMORY;
  		}
  
  		if (!h264_context_reset(surface->h264, surface->width, surface->height))
  			return ERROR_INTERNAL_ERROR;
  	}
  
  	if (!surface->h264)
  		return ERROR_NOT_SUPPORTED;
  
  	bs = (RDPGFX_AVC420_BITMAP_STREAM*)cmd->extra;
  
  	if (!bs)
  		return ERROR_INTERNAL_ERROR;
  
  	meta = &(bs->meta);
  	rc = avc420_decompress(surface->h264, bs->data, bs->length, surface->data, surface->format,
  	                       surface->scanline, surface->width, surface->height, meta->regionRects,
  	                       meta->numRegionRects);
  
  	if (rc < 0)
  	{
  		WLog_WARN(TAG, "avc420_decompress failure: %" PRId32 ", ignoring update.", rc);
  		return CHANNEL_RC_OK;
  	}
  
  	for (i = 0; i < meta->numRegionRects; i++)
  	{
  		region16_union_rect(&(surface->invalidRegion), &(surface->invalidRegion),
  		                    (RECTANGLE_16*)&(meta->regionRects[i]));
  	}
  
  	status = IFCALLRESULT(CHANNEL_RC_OK, context->UpdateSurfaceArea, context, surface->surfaceId,
  	                      meta->numRegionRects, meta->regionRects);
  
  	if (status != CHANNEL_RC_OK)
  		goto fail;
  
  	if (!gdi->inGfxFrame)
  	{
  		status = CHANNEL_RC_NOT_INITIALIZED;
  		IFCALLRET(context->UpdateSurfaces, status, context);
  	}
  
  fail:
  	return status;
  #else
  	return ERROR_NOT_SUPPORTED;
  #endif
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_SurfaceCommand_AVC444(rdpGdi* gdi, RdpgfxClientContext* context,
                                        const RDPGFX_SURFACE_COMMAND* cmd)
  {
  #ifdef WITH_GFX_H264
  	INT32 rc;
  	UINT status = CHANNEL_RC_OK;
  	UINT32 i;
  	gdiGfxSurface* surface;
  	RDPGFX_AVC444_BITMAP_STREAM* bs;
  	RDPGFX_AVC420_BITMAP_STREAM* avc1;
  	RDPGFX_H264_METABLOCK* meta1;
  	RDPGFX_AVC420_BITMAP_STREAM* avc2;
  	RDPGFX_H264_METABLOCK* meta2;
  	surface = (gdiGfxSurface*)context->GetSurfaceData(context, cmd->surfaceId);
  
  	if (!surface)
  	{
  		WLog_ERR(TAG, "%s: unable to retrieve surfaceData for surfaceId=%" PRIu32 "", __FUNCTION__,
  		         cmd->surfaceId);
  		return ERROR_NOT_FOUND;
  	}
  
  	if (!surface->h264)
  	{
  		surface->h264 = h264_context_new(FALSE);
  
  		if (!surface->h264)
  		{
  			WLog_ERR(TAG, "%s: unable to create h264 context", __FUNCTION__);
  			return ERROR_NOT_ENOUGH_MEMORY;
  		}
  
  		if (!h264_context_reset(surface->h264, surface->width, surface->height))
  			return ERROR_INTERNAL_ERROR;
  	}
  
  	if (!surface->h264)
  		return ERROR_NOT_SUPPORTED;
  
  	bs = (RDPGFX_AVC444_BITMAP_STREAM*)cmd->extra;
  
  	if (!bs)
  		return ERROR_INTERNAL_ERROR;
  
  	avc1 = &bs->bitstream[0];
  	avc2 = &bs->bitstream[1];
  	meta1 = &avc1->meta;
  	meta2 = &avc2->meta;
  	rc = avc444_decompress(surface->h264, bs->LC, meta1->regionRects, meta1->numRegionRects,
  	                       avc1->data, avc1->length, meta2->regionRects, meta2->numRegionRects,
  	                       avc2->data, avc2->length, surface->data, surface->format,
  	                       surface->scanline, surface->width, surface->height, cmd->codecId);
  
  	if (rc < 0)
  	{
  		WLog_WARN(TAG, "avc444_decompress failure: %" PRIu32 ", ignoring update.", status);
  		return CHANNEL_RC_OK;
  	}
  
  	for (i = 0; i < meta1->numRegionRects; i++)
  	{
  		region16_union_rect(&(surface->invalidRegion), &(surface->invalidRegion),
  		                    &(meta1->regionRects[i]));
  	}
  
  	status = IFCALLRESULT(CHANNEL_RC_OK, context->UpdateSurfaceArea, context, surface->surfaceId,
  	                      meta1->numRegionRects, meta1->regionRects);
  
  	if (status != CHANNEL_RC_OK)
  		goto fail;
  
  	for (i = 0; i < meta2->numRegionRects; i++)
  	{
  		region16_union_rect(&(surface->invalidRegion), &(surface->invalidRegion),
  		                    &(meta2->regionRects[i]));
  	}
  
  	status = IFCALLRESULT(CHANNEL_RC_OK, context->UpdateSurfaceArea, context, surface->surfaceId,
  	                      meta2->numRegionRects, meta2->regionRects);
  
  	if (status != CHANNEL_RC_OK)
  		goto fail;
  
  	if (!gdi->inGfxFrame)
  	{
  		status = CHANNEL_RC_NOT_INITIALIZED;
  		IFCALLRET(context->UpdateSurfaces, status, context);
  	}
  
  fail:
  	return status;
  #else
  	return ERROR_NOT_SUPPORTED;
  #endif
  }
  
  static BOOL gdi_apply_alpha(BYTE* data, UINT32 format, UINT32 stride, RECTANGLE_16* rect,
                              UINT32 startOffsetX, UINT32 count, BYTE a)
  {
  	UINT32 y;
  	UINT32 written = 0;
  	BOOL first = TRUE;
  	const UINT32 bpp = GetBytesPerPixel(format);
  
  	for (y = rect->top; y < rect->bottom; y++)
  	{
  		UINT32 x;
  		BYTE* line = &data[stride * y];
  
  		for (x = first ? rect->left + startOffsetX : rect->left; x < rect->right; x++)
  		{
  			UINT32 color;
  			BYTE r, g, b;
  			BYTE* src;
  
  			if (written == count)
  				return TRUE;
  
  			src = &line[x * bpp];
  			color = ReadColor(src, format);
  			SplitColor(color, format, &r, &g, &b, NULL, NULL);
  			color = FreeRDPGetColor(format, r, g, b, a);
  			WriteColor(src, format, color);
  			written++;
  		}
  
  		first = FALSE;
  	}
  
  	return TRUE;
  }
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_SurfaceCommand_Alpha(rdpGdi* gdi, RdpgfxClientContext* context,
                                       const RDPGFX_SURFACE_COMMAND* cmd)
  {
  	UINT status = CHANNEL_RC_OK;
  	UINT16 alphaSig, compressed;
  	gdiGfxSurface* surface;
  	RECTANGLE_16 invalidRect;
  	wStream s;
  	Stream_StaticInit(&s, cmd->data, cmd->length);
  
  	if (Stream_GetRemainingLength(&s) < 4)
  		return ERROR_INVALID_DATA;
  
  	surface = (gdiGfxSurface*)context->GetSurfaceData(context, cmd->surfaceId);
  
  	if (!surface)
  	{
  		WLog_ERR(TAG, "%s: unable to retrieve surfaceData for surfaceId=%" PRIu32 "", __FUNCTION__,
  		         cmd->surfaceId);
  		return ERROR_NOT_FOUND;
  	}
  
  	Stream_Read_UINT16(&s, alphaSig);
  	Stream_Read_UINT16(&s, compressed);
  
  	if (alphaSig != 0x414C)
  		return ERROR_INVALID_DATA;
  
  	if (compressed == 0)
  	{
  		UINT32 x, y;
  
  		if (Stream_GetRemainingLength(&s) < cmd->height * cmd->width)
  			return ERROR_INVALID_DATA;
  
  		for (y = cmd->top; y < cmd->top + cmd->height; y++)
  		{
  			BYTE* line = &surface->data[surface->scanline * y];
  
  			for (x = cmd->left; x < cmd->left + cmd->width; x++)
  			{
  				UINT32 color;
  				BYTE r, g, b, a;
  				BYTE* src = &line[x * GetBytesPerPixel(surface->format)];
  				Stream_Read_UINT8(&s, a);
  				color = ReadColor(src, surface->format);
  				SplitColor(color, surface->format, &r, &g, &b, NULL, NULL);
  				color = FreeRDPGetColor(surface->format, r, g, b, a);
  				WriteColor(src, surface->format, color);
  			}
  		}
  	}
  	else
  	{
  		UINT32 startOffsetX = 0;
  		RECTANGLE_16 rect;
  		rect.left = cmd->left;
  		rect.top = cmd->top;
  		rect.right = cmd->left + cmd->width;
  		rect.bottom = cmd->top + cmd->height;
  
  		while (rect.top < rect.bottom)
  		{
  			UINT32 count;
  			BYTE a;
  
  			if (Stream_GetRemainingLength(&s) < 2)
  				return ERROR_INVALID_DATA;
  
  			Stream_Read_UINT8(&s, a);
  			Stream_Read_UINT8(&s, count);
  
  			if (count >= 0xFF)
  			{
  				if (Stream_GetRemainingLength(&s) < 2)
  					return ERROR_INVALID_DATA;
  
  				Stream_Read_UINT16(&s, count);
  
  				if (count >= 0xFFFF)
  				{
  					if (Stream_GetRemainingLength(&s) < 4)
  						return ERROR_INVALID_DATA;
  
  					Stream_Read_UINT32(&s, count);
  				}
  			}
  
  			if (!gdi_apply_alpha(surface->data, surface->format, surface->scanline, &rect,
  			                     startOffsetX, count, a))
  				return ERROR_INTERNAL_ERROR;
  
  			startOffsetX += count;
  
  			while (startOffsetX >= cmd->width)
  			{
  				startOffsetX -= cmd->width;
  				rect.top++;
  			}
  		}
  	}
  
  	invalidRect.left = cmd->left;
  	invalidRect.top = cmd->top;
  	invalidRect.right = cmd->right;
  	invalidRect.bottom = cmd->bottom;
  	region16_union_rect(&(surface->invalidRegion), &(surface->invalidRegion), &invalidRect);
  	status = IFCALLRESULT(CHANNEL_RC_OK, context->UpdateSurfaceArea, context, surface->surfaceId, 1,
  	                      &invalidRect);
  
  	if (status != CHANNEL_RC_OK)
  		goto fail;
  
  	if (!gdi->inGfxFrame)
  	{
  		status = CHANNEL_RC_NOT_INITIALIZED;
  		IFCALLRET(context->UpdateSurfaces, status, context);
  	}
  
  fail:
  	return status;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_SurfaceCommand_Progressive(rdpGdi* gdi, RdpgfxClientContext* context,
                                             const RDPGFX_SURFACE_COMMAND* cmd)
  {
  	INT32 rc;
  	UINT status = CHANNEL_RC_OK;
  	gdiGfxSurface* surface;
  	REGION16 invalidRegion;
  	const RECTANGLE_16* rects;
  	UINT32 nrRects, x;
  	/**
  	 * Note: Since this comes via a Wire-To-Surface-2 PDU the
  	 * cmd's top/left/right/bottom/width/height members are always zero!
  	 * The update region is determined during decompression.
  	 */
  	surface = (gdiGfxSurface*)context->GetSurfaceData(context, cmd->surfaceId);
  
  	if (!surface)
  	{
  		WLog_ERR(TAG, "%s: unable to retrieve surfaceData for surfaceId=%" PRIu32 "", __FUNCTION__,
  		         cmd->surfaceId);
  		return ERROR_NOT_FOUND;
  	}
  
  	rc = progressive_create_surface_context(surface->codecs->progressive, cmd->surfaceId,
  	                                        surface->width, surface->height);
  
  	if (rc < 0)
  	{
  		WLog_ERR(TAG, "progressive_create_surface_context failure: %" PRId32 "", rc);
  		return ERROR_INTERNAL_ERROR;
  	}
  
  	region16_init(&invalidRegion);
  	rc = progressive_decompress(surface->codecs->progressive, cmd->data, cmd->length, surface->data,
  	                            surface->format, surface->scanline, cmd->left, cmd->top,
  	                            &invalidRegion, cmd->surfaceId);
  
  	if (rc < 0)
  	{
  		WLog_ERR(TAG, "progressive_decompress failure: %" PRId32 "", rc);
  		region16_uninit(&invalidRegion);
  		return ERROR_INTERNAL_ERROR;
  	}
  
  	rects = region16_rects(&invalidRegion, &nrRects);
  	status = IFCALLRESULT(CHANNEL_RC_OK, context->UpdateSurfaceArea, context, surface->surfaceId,
  	                      nrRects, rects);
  
  	if (status != CHANNEL_RC_OK)
  		goto fail;
  
  	for (x = 0; x < nrRects; x++)
  		region16_union_rect(&surface->invalidRegion, &surface->invalidRegion, &rects[x]);
  
  	region16_uninit(&invalidRegion);
  
  	if (!gdi->inGfxFrame)
  	{
  		status = CHANNEL_RC_NOT_INITIALIZED;
  		IFCALLRET(context->UpdateSurfaces, status, context);
  	}
  
  fail:
  	return status;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_SurfaceCommand(RdpgfxClientContext* context, const RDPGFX_SURFACE_COMMAND* cmd)
  {
  	UINT status = CHANNEL_RC_OK;
  	rdpGdi* gdi;
  
  	if (!context || !cmd)
  		return ERROR_INVALID_PARAMETER;
  
  	gdi = (rdpGdi*)context->custom;
  
  	EnterCriticalSection(&context->mux);
  	WLog_Print(gdi->log, WLOG_TRACE,
  	           "surfaceId=%" PRIu32 ", codec=%" PRIu32 ", contextId=%" PRIu32 ", format=%s, "
  	           "left=%" PRIu32 ", top=%" PRIu32 ", right=%" PRIu32 ", bottom=%" PRIu32
  	           ", width=%" PRIu32 ", height=%" PRIu32 " "
  	           "length=%" PRIu32 ", data=%p, extra=%p",
  	           cmd->surfaceId, cmd->codecId, cmd->contextId, FreeRDPGetColorFormatName(cmd->format),
  	           cmd->left, cmd->top, cmd->right, cmd->bottom, cmd->width, cmd->height, cmd->length,
  	           (void*)cmd->data, (void*)cmd->extra);
  
  	switch (cmd->codecId)
  	{
  		case RDPGFX_CODECID_UNCOMPRESSED:
  			status = gdi_SurfaceCommand_Uncompressed(gdi, context, cmd);
  			break;
  
  		case RDPGFX_CODECID_CAVIDEO:
  			status = gdi_SurfaceCommand_RemoteFX(gdi, context, cmd);
  			break;
  
  		case RDPGFX_CODECID_CLEARCODEC:
  			status = gdi_SurfaceCommand_ClearCodec(gdi, context, cmd);
  			break;
  
  		case RDPGFX_CODECID_PLANAR:
  			status = gdi_SurfaceCommand_Planar(gdi, context, cmd);
  			break;
  
  		case RDPGFX_CODECID_AVC420:
  			status = gdi_SurfaceCommand_AVC420(gdi, context, cmd);
  			break;
  
  		case RDPGFX_CODECID_AVC444v2:
  		case RDPGFX_CODECID_AVC444:
  			status = gdi_SurfaceCommand_AVC444(gdi, context, cmd);
  			break;
  
  		case RDPGFX_CODECID_ALPHA:
  			status = gdi_SurfaceCommand_Alpha(gdi, context, cmd);
  			break;
  
  		case RDPGFX_CODECID_CAPROGRESSIVE:
  			status = gdi_SurfaceCommand_Progressive(gdi, context, cmd);
  			break;
  
  		case RDPGFX_CODECID_CAPROGRESSIVE_V2:
  			WLog_WARN(TAG, "SurfaceCommand 0x%08" PRIX32 " not implemented", cmd->codecId);
  			break;
  
  		default:
  			WLog_WARN(TAG, "Invalid SurfaceCommand 0x%08" PRIX32 "", cmd->codecId);
  			break;
  	}
  
  	LeaveCriticalSection(&context->mux);
  	return status;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT
  gdi_DeleteEncodingContext(RdpgfxClientContext* context,
                            const RDPGFX_DELETE_ENCODING_CONTEXT_PDU* deleteEncodingContext)
  {
  	return CHANNEL_RC_OK;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_CreateSurface(RdpgfxClientContext* context,
                                const RDPGFX_CREATE_SURFACE_PDU* createSurface)
  {
  	UINT rc = ERROR_INTERNAL_ERROR;
  	gdiGfxSurface* surface;
  	rdpGdi* gdi = (rdpGdi*)context->custom;
  	EnterCriticalSection(&context->mux);
  	surface = (gdiGfxSurface*)calloc(1, sizeof(gdiGfxSurface));
  
  	if (!surface)
  		goto fail;
  
  	surface->codecs = gdi->context->codecs;
  
  	if (!surface->codecs)
  	{
  		free(surface);
  		goto fail;
  	}
  
  	surface->surfaceId = createSurface->surfaceId;
  	surface->width = gfx_align_scanline(createSurface->width, 16);
  	surface->height = gfx_align_scanline(createSurface->height, 16);
  	surface->mappedWidth = createSurface->width;
  	surface->mappedHeight = createSurface->height;
  	surface->outputTargetWidth = createSurface->width;
  	surface->outputTargetHeight = createSurface->height;
  
  	switch (createSurface->pixelFormat)
  	{
  		case GFX_PIXEL_FORMAT_ARGB_8888:
  			surface->format = PIXEL_FORMAT_BGRA32;
  			break;
  
  		case GFX_PIXEL_FORMAT_XRGB_8888:
  			surface->format = PIXEL_FORMAT_BGRX32;
  			break;
  
  		default:
  			free(surface);
  			goto fail;
  	}
  
  	surface->scanline = gfx_align_scanline(surface->width * 4, 16);
  	surface->data = (BYTE*)_aligned_malloc(surface->scanline * surface->height, 16);
  
  	if (!surface->data)
  	{
  		free(surface);
  		goto fail;
  	}
  
  	surface->outputMapped = FALSE;
  	region16_init(&surface->invalidRegion);
  	rc = context->SetSurfaceData(context, surface->surfaceId, (void*)surface);
  fail:
  	LeaveCriticalSection(&context->mux);
  	return rc;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_DeleteSurface(RdpgfxClientContext* context,
                                const RDPGFX_DELETE_SURFACE_PDU* deleteSurface)
  {
  	UINT rc = ERROR_INTERNAL_ERROR;
  	rdpCodecs* codecs = NULL;
  	gdiGfxSurface* surface = NULL;
  	EnterCriticalSection(&context->mux);
  	surface = (gdiGfxSurface*)context->GetSurfaceData(context, deleteSurface->surfaceId);
  
  	if (surface)
  	{
  		if (surface->windowId != 0)
  			rc = IFCALLRESULT(CHANNEL_RC_OK, context->UnmapWindowForSurface, context,
  			                  surface->windowId);
  
  #ifdef WITH_GFX_H264
  		h264_context_free(surface->h264);
  #endif
  		region16_uninit(&surface->invalidRegion);
  		codecs = surface->codecs;
  		_aligned_free(surface->data);
  		free(surface);
  	}
  
  	rc = context->SetSurfaceData(context, deleteSurface->surfaceId, NULL);
  
  	if (codecs && codecs->progressive)
  		progressive_delete_surface_context(codecs->progressive, deleteSurface->surfaceId);
  
  	LeaveCriticalSection(&context->mux);
  	return rc;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_SolidFill(RdpgfxClientContext* context, const RDPGFX_SOLID_FILL_PDU* solidFill)
  {
  	UINT status = ERROR_INTERNAL_ERROR;
  	UINT16 index;
  	UINT32 color;
  	BYTE a, r, g, b;
  	UINT32 nWidth, nHeight;
  	RECTANGLE_16* rect;
  	gdiGfxSurface* surface;
  	RECTANGLE_16 invalidRect;
  	rdpGdi* gdi = (rdpGdi*)context->custom;
  	EnterCriticalSection(&context->mux);
  	surface = (gdiGfxSurface*)context->GetSurfaceData(context, solidFill->surfaceId);
  
  	if (!surface)
  		goto fail;
  
  	b = solidFill->fillPixel.B;
  	g = solidFill->fillPixel.G;
  	r = solidFill->fillPixel.R;
  	/* a = solidFill->fillPixel.XA;
  	 * Ignore alpha channel, this is a solid fill. */
  	a = 0xFF;
  	color = FreeRDPGetColor(surface->format, r, g, b, a);
  
  	for (index = 0; index < solidFill->fillRectCount; index++)
  	{
  		rect = &(solidFill->fillRects[index]);
  		nWidth = rect->right - rect->left;
  		nHeight = rect->bottom - rect->top;
  		invalidRect.left = rect->left;
  		invalidRect.top = rect->top;
  		invalidRect.right = rect->right;
  		invalidRect.bottom = rect->bottom;
  
  		if (!freerdp_image_fill(surface->data, surface->format, surface->scanline, rect->left,
  		                        rect->top, nWidth, nHeight, color))
  			goto fail;
  
  		region16_union_rect(&(surface->invalidRegion), &(surface->invalidRegion), &invalidRect);
  	}
  
  	status = IFCALLRESULT(CHANNEL_RC_OK, context->UpdateSurfaceArea, context, surface->surfaceId,
  	                      solidFill->fillRectCount, solidFill->fillRects);
  
  	if (status != CHANNEL_RC_OK)
  		goto fail;
  
  	LeaveCriticalSection(&context->mux);
  
  	if (!gdi->inGfxFrame)
  	{
  		status = CHANNEL_RC_NOT_INITIALIZED;
  		IFCALLRET(context->UpdateSurfaces, status, context);
  	}
  
  	return status;
  fail:
  	LeaveCriticalSection(&context->mux);
  	return status;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_SurfaceToSurface(RdpgfxClientContext* context,
                                   const RDPGFX_SURFACE_TO_SURFACE_PDU* surfaceToSurface)
  {
  	UINT status = ERROR_INTERNAL_ERROR;
  	UINT16 index;
  	BOOL sameSurface;
  	UINT32 nWidth, nHeight;
  	const RECTANGLE_16* rectSrc;
  	RDPGFX_POINT16* destPt;
  	RECTANGLE_16 invalidRect;
  	gdiGfxSurface* surfaceSrc;
  	gdiGfxSurface* surfaceDst;
  	rdpGdi* gdi = (rdpGdi*)context->custom;
  	EnterCriticalSection(&context->mux);
  	rectSrc = &(surfaceToSurface->rectSrc);
  	surfaceSrc = (gdiGfxSurface*)context->GetSurfaceData(context, surfaceToSurface->surfaceIdSrc);
  	sameSurface =
  	    (surfaceToSurface->surfaceIdSrc == surfaceToSurface->surfaceIdDest) ? TRUE : FALSE;
  
  	if (!sameSurface)
  		surfaceDst =
  		    (gdiGfxSurface*)context->GetSurfaceData(context, surfaceToSurface->surfaceIdDest);
  	else
  		surfaceDst = surfaceSrc;
  
  	if (!surfaceSrc || !surfaceDst)
  		goto fail;
  
  	nWidth = rectSrc->right - rectSrc->left;
  	nHeight = rectSrc->bottom - rectSrc->top;
  
  	for (index = 0; index < surfaceToSurface->destPtsCount; index++)
  	{
  		destPt = &surfaceToSurface->destPts[index];
  
  		if (!freerdp_image_copy(surfaceDst->data, surfaceDst->format, surfaceDst->scanline,
  		                        destPt->x, destPt->y, nWidth, nHeight, surfaceSrc->data,
  		                        surfaceSrc->format, surfaceSrc->scanline, rectSrc->left,
  		                        rectSrc->top, NULL, FREERDP_FLIP_NONE))
  			goto fail;
  
  		invalidRect.left = destPt->x;
  		invalidRect.top = destPt->y;
  		invalidRect.right = destPt->x + rectSrc->right;
  		invalidRect.bottom = destPt->y + rectSrc->bottom;
  		region16_union_rect(&surfaceDst->invalidRegion, &surfaceDst->invalidRegion, &invalidRect);
  		status = IFCALLRESULT(CHANNEL_RC_OK, context->UpdateSurfaceArea, context,
  		                      surfaceDst->surfaceId, 1, &invalidRect);
  
  		if (status != CHANNEL_RC_OK)
  			goto fail;
  	}
  
  	LeaveCriticalSection(&context->mux);
  
  	if (!gdi->inGfxFrame)
  	{
  		status = CHANNEL_RC_NOT_INITIALIZED;
  		IFCALLRET(context->UpdateSurfaces, status, context);
  	}
  
  	return status;
  fail:
  	LeaveCriticalSection(&context->mux);
  	return status;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_SurfaceToCache(RdpgfxClientContext* context,
                                 const RDPGFX_SURFACE_TO_CACHE_PDU* surfaceToCache)
  {
  	const RECTANGLE_16* rect;
  	gdiGfxSurface* surface;
  	gdiGfxCacheEntry* cacheEntry;
  	UINT rc = ERROR_INTERNAL_ERROR;
  	EnterCriticalSection(&context->mux);
  	rect = &(surfaceToCache->rectSrc);
  	surface = (gdiGfxSurface*)context->GetSurfaceData(context, surfaceToCache->surfaceId);
  
  	if (!surface)
  		goto fail;
  
  	cacheEntry = (gdiGfxCacheEntry*)calloc(1, sizeof(gdiGfxCacheEntry));
  
  	if (!cacheEntry)
  		goto fail;
  
  	cacheEntry->width = (UINT32)(rect->right - rect->left);
  	cacheEntry->height = (UINT32)(rect->bottom - rect->top);
  	cacheEntry->format = surface->format;
  	cacheEntry->scanline = gfx_align_scanline(cacheEntry->width * 4, 16);
  	cacheEntry->data = (BYTE*)calloc(cacheEntry->height, cacheEntry->scanline);
  
  	if (!cacheEntry->data)
  	{
  		free(cacheEntry);
  		goto fail;
  	}
  
  	if (!freerdp_image_copy(cacheEntry->data, cacheEntry->format, cacheEntry->scanline, 0, 0,
  	                        cacheEntry->width, cacheEntry->height, surface->data, surface->format,
  	                        surface->scanline, rect->left, rect->top, NULL, FREERDP_FLIP_NONE))
  	{
  		free(cacheEntry->data);
  		free(cacheEntry);
  		goto fail;
  	}
  
  	rc = context->SetCacheSlotData(context, surfaceToCache->cacheSlot, (void*)cacheEntry);
  fail:
  	LeaveCriticalSection(&context->mux);
  	return rc;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_CacheToSurface(RdpgfxClientContext* context,
                                 const RDPGFX_CACHE_TO_SURFACE_PDU* cacheToSurface)
  {
  	UINT status = ERROR_INTERNAL_ERROR;
  	UINT16 index;
  	RDPGFX_POINT16* destPt;
  	gdiGfxSurface* surface;
  	gdiGfxCacheEntry* cacheEntry;
  	RECTANGLE_16 invalidRect;
  	rdpGdi* gdi = (rdpGdi*)context->custom;
  	EnterCriticalSection(&context->mux);
  	surface = (gdiGfxSurface*)context->GetSurfaceData(context, cacheToSurface->surfaceId);
  	cacheEntry = (gdiGfxCacheEntry*)context->GetCacheSlotData(context, cacheToSurface->cacheSlot);
  
  	if (!surface || !cacheEntry)
  		goto fail;
  
  	for (index = 0; index < cacheToSurface->destPtsCount; index++)
  	{
  		destPt = &cacheToSurface->destPts[index];
  
  		if (!freerdp_image_copy(surface->data, surface->format, surface->scanline, destPt->x,
  		                        destPt->y, cacheEntry->width, cacheEntry->height, cacheEntry->data,
  		                        cacheEntry->format, cacheEntry->scanline, 0, 0, NULL,
  		                        FREERDP_FLIP_NONE))
  			goto fail;
  
  		invalidRect.left = destPt->x;
  		invalidRect.top = destPt->y;
  		invalidRect.right = destPt->x + cacheEntry->width;
  		invalidRect.bottom = destPt->y + cacheEntry->height;
  		region16_union_rect(&surface->invalidRegion, &surface->invalidRegion, &invalidRect);
  		status = IFCALLRESULT(CHANNEL_RC_OK, context->UpdateSurfaceArea, context,
  		                      surface->surfaceId, 1, &invalidRect);
  
  		if (status != CHANNEL_RC_OK)
  			goto fail;
  	}
  
  	LeaveCriticalSection(&context->mux);
  
  	if (!gdi->inGfxFrame)
  	{
  		status = CHANNEL_RC_NOT_INITIALIZED;
  		IFCALLRET(context->UpdateSurfaces, status, context);
  	}
  	else
  		status = CHANNEL_RC_OK;
  
  	return status;
  fail:
  	LeaveCriticalSection(&context->mux);
  	return status;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_CacheImportReply(RdpgfxClientContext* context,
                                   const RDPGFX_CACHE_IMPORT_REPLY_PDU* cacheImportReply)
  {
  	return CHANNEL_RC_OK;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_EvictCacheEntry(RdpgfxClientContext* context,
                                  const RDPGFX_EVICT_CACHE_ENTRY_PDU* evictCacheEntry)
  {
  	gdiGfxCacheEntry* cacheEntry;
  	UINT rc = ERROR_NOT_FOUND;
  	EnterCriticalSection(&context->mux);
  	cacheEntry = (gdiGfxCacheEntry*)context->GetCacheSlotData(context, evictCacheEntry->cacheSlot);
  
  	if (cacheEntry)
  	{
  		free(cacheEntry->data);
  		free(cacheEntry);
  		rc = context->SetCacheSlotData(context, evictCacheEntry->cacheSlot, NULL);
  	}
  
  	LeaveCriticalSection(&context->mux);
  	return rc;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_MapSurfaceToOutput(RdpgfxClientContext* context,
                                     const RDPGFX_MAP_SURFACE_TO_OUTPUT_PDU* surfaceToOutput)
  {
  	UINT rc = ERROR_INTERNAL_ERROR;
  	gdiGfxSurface* surface;
  	EnterCriticalSection(&context->mux);
  	surface = (gdiGfxSurface*)context->GetSurfaceData(context, surfaceToOutput->surfaceId);
  
  	if (!surface)
  		goto fail;
  
  	surface->outputMapped = TRUE;
  	surface->outputOriginX = surfaceToOutput->outputOriginX;
  	surface->outputOriginY = surfaceToOutput->outputOriginY;
  	surface->outputTargetWidth = surface->mappedWidth;
  	surface->outputTargetHeight = surface->mappedHeight;
  	region16_clear(&surface->invalidRegion);
  	rc = CHANNEL_RC_OK;
  fail:
  	LeaveCriticalSection(&context->mux);
  	return rc;
  }
  
  static UINT
  gdi_MapSurfaceToScaledOutput(RdpgfxClientContext* context,
                               const RDPGFX_MAP_SURFACE_TO_SCALED_OUTPUT_PDU* surfaceToOutput)
  {
  	UINT rc = ERROR_INTERNAL_ERROR;
  	gdiGfxSurface* surface;
  	EnterCriticalSection(&context->mux);
  	surface = (gdiGfxSurface*)context->GetSurfaceData(context, surfaceToOutput->surfaceId);
  
  	if (!surface)
  		goto fail;
  
  	surface->outputMapped = TRUE;
  	surface->outputOriginX = surfaceToOutput->outputOriginX;
  	surface->outputOriginY = surfaceToOutput->outputOriginY;
  	surface->outputTargetWidth = surfaceToOutput->targetWidth;
  	surface->outputTargetHeight = surfaceToOutput->targetHeight;
  	region16_clear(&surface->invalidRegion);
  	rc = CHANNEL_RC_OK;
  fail:
  	LeaveCriticalSection(&context->mux);
  	return rc;
  }
  
  /**
   * Function description
   *
   * @return 0 on success, otherwise a Win32 error code
   */
  static UINT gdi_MapSurfaceToWindow(RdpgfxClientContext* context,
                                     const RDPGFX_MAP_SURFACE_TO_WINDOW_PDU* surfaceToWindow)
  {
  	UINT rc = ERROR_INTERNAL_ERROR;
  	gdiGfxSurface* surface;
  	EnterCriticalSection(&context->mux);
  	surface = (gdiGfxSurface*)context->GetSurfaceData(context, surfaceToWindow->surfaceId);
  
  	if (!surface)
  		goto fail;
  
  	if (surface->windowId != 0)
  	{
  		if (surface->windowId != surfaceToWindow->windowId)
  			goto fail;
  	}
  
  	surface->windowId = surfaceToWindow->windowId;
  	surface->mappedWidth = surfaceToWindow->mappedWidth;
  	surface->mappedHeight = surfaceToWindow->mappedHeight;
  	surface->outputTargetWidth = surfaceToWindow->mappedWidth;
  	surface->outputTargetHeight = surfaceToWindow->mappedHeight;
  	rc = IFCALLRESULT(CHANNEL_RC_OK, context->MapWindowForSurface, context,
  	                  surfaceToWindow->surfaceId, surfaceToWindow->windowId);
  fail:
  	LeaveCriticalSection(&context->mux);
  	return rc;
  }
  
  static UINT
  gdi_MapSurfaceToScaledWindow(RdpgfxClientContext* context,
                               const RDPGFX_MAP_SURFACE_TO_SCALED_WINDOW_PDU* surfaceToWindow)
  {
  	UINT rc = ERROR_INTERNAL_ERROR;
  	gdiGfxSurface* surface;
  	EnterCriticalSection(&context->mux);
  	surface = (gdiGfxSurface*)context->GetSurfaceData(context, surfaceToWindow->surfaceId);
  
  	if (!surface)
  		goto fail;
  
  	if (surface->windowId != 0)
  	{
  		if (surface->windowId != surfaceToWindow->windowId)
  			goto fail;
  	}
  
  	surface->windowId = surfaceToWindow->windowId;
  	surface->mappedWidth = surfaceToWindow->mappedWidth;
  	surface->mappedHeight = surfaceToWindow->mappedHeight;
  	surface->outputTargetWidth = surfaceToWindow->targetWidth;
  	surface->outputTargetHeight = surfaceToWindow->targetHeight;
  	rc = IFCALLRESULT(CHANNEL_RC_OK, context->MapWindowForSurface, context,
  	                  surfaceToWindow->surfaceId, surfaceToWindow->windowId);
  fail:
  	LeaveCriticalSection(&context->mux);
  	return rc;
  }
  
  BOOL gdi_graphics_pipeline_init(rdpGdi* gdi, RdpgfxClientContext* gfx)
  {
  	return gdi_graphics_pipeline_init_ex(gdi, gfx, NULL, NULL, NULL);
  }
  
  BOOL gdi_graphics_pipeline_init_ex(rdpGdi* gdi, RdpgfxClientContext* gfx,
                                     pcRdpgfxMapWindowForSurface map,
                                     pcRdpgfxUnmapWindowForSurface unmap,
                                     pcRdpgfxUpdateSurfaceArea update)
  {
  	if (!gdi || !gfx)
  		return FALSE;
  
  	gdi->gfx = gfx;
  	gfx->custom = (void*)gdi;
  	gfx->ResetGraphics = gdi_ResetGraphics;
  	gfx->StartFrame = gdi_StartFrame;
  	gfx->EndFrame = gdi_EndFrame;
  	gfx->SurfaceCommand = gdi_SurfaceCommand;
  	gfx->DeleteEncodingContext = gdi_DeleteEncodingContext;
  	gfx->CreateSurface = gdi_CreateSurface;
  	gfx->DeleteSurface = gdi_DeleteSurface;
  	gfx->SolidFill = gdi_SolidFill;
  	gfx->SurfaceToSurface = gdi_SurfaceToSurface;
  	gfx->SurfaceToCache = gdi_SurfaceToCache;
  	gfx->CacheToSurface = gdi_CacheToSurface;
  	gfx->CacheImportReply = gdi_CacheImportReply;
  	gfx->EvictCacheEntry = gdi_EvictCacheEntry;
  	gfx->MapSurfaceToOutput = gdi_MapSurfaceToOutput;
  	gfx->MapSurfaceToWindow = gdi_MapSurfaceToWindow;
  	gfx->MapSurfaceToScaledOutput = gdi_MapSurfaceToScaledOutput;
  	gfx->MapSurfaceToScaledWindow = gdi_MapSurfaceToScaledWindow;
  	gfx->UpdateSurfaces = gdi_UpdateSurfaces;
  	gfx->MapWindowForSurface = map;
  	gfx->UnmapWindowForSurface = unmap;
  	gfx->UpdateSurfaceArea = update;
  	InitializeCriticalSection(&gfx->mux);
  	PROFILER_CREATE(gfx->SurfaceProfiler, "GFX-PROFILER");
  
  	/**
  	 * gdi->graphicsReset will be removed in FreeRDP v3 from public headers,
  	 * since the EGFX Reset Graphics PDU seems to be optional.
  	 * There are still some clients that expect and check it and therefore
  	 * we simply initialize it with TRUE here for now.
  	 */
  	gdi->graphicsReset = TRUE;
  
  	return TRUE;
  }
  
  void gdi_graphics_pipeline_uninit(rdpGdi* gdi, RdpgfxClientContext* gfx)
  {
  	if (gdi)
  		gdi->gfx = NULL;
  
  	if (!gfx)
  		return;
  
  	gfx->custom = NULL;
  	DeleteCriticalSection(&gfx->mux);
  	PROFILER_PRINT_HEADER
  	PROFILER_PRINT(gfx->SurfaceProfiler)
  	PROFILER_PRINT_FOOTER
  	PROFILER_FREE(gfx->SurfaceProfiler)
  }
  