/*****************************************************************************/
// Copyright 2006-2019 Adobe Systems Incorporated
// All Rights Reserved.
//
// NOTICE:  Adobe permits you to use, modify, and distribute this file in
// accordance with the terms of the Adobe license agreement accompanying it.
/*****************************************************************************/

#include "dng_filter_task.h"

#include "dng_bottlenecks.h"
#include "dng_exceptions.h"
#include "dng_image.h"
#include "dng_memory.h"
#include "dng_tag_types.h"
#include "dng_tag_values.h"
#include "dng_utils.h"

/*****************************************************************************/

dng_filter_task::dng_filter_task (const char *name,
								  const dng_image &srcImage,
						 		  dng_image &dstImage)

	:	dng_area_task (name)

	,	fSrcImage     (srcImage)
	,	fDstImage     (dstImage)

	,	fSrcPlane     (0                    )
	,	fSrcPlanes    (srcImage.Planes    ())
	,	fSrcPixelType (srcImage.PixelType ())

	,	fDstPlane     (0                    )
	,	fDstPlanes    (dstImage.Planes    ())
	,	fDstPixelType (dstImage.PixelType ())

	,	fSrcRepeat    (1, 1)
	,	fSrcTileSize  (0, 0)

	{

	}

/*****************************************************************************/

dng_filter_task::~dng_filter_task ()
	{

	}

/*****************************************************************************/

void dng_filter_task::Start (uint32 threadCount,
							 const dng_rect & /* dstArea */,
							 const dng_point &tileSize,
							 dng_memory_allocator *allocator,
							 dng_abort_sniffer * /* sniffer */)
	{

	fSrcTileSize = SrcTileSize (tileSize);

	uint32 srcBufferSize = ComputeBufferSize (fSrcPixelType,
											  fSrcTileSize,
											  fSrcPlanes,
											  padSIMDBytes);

	uint32 dstBufferSize = ComputeBufferSize (fDstPixelType,
											  tileSize,
											  fDstPlanes,
											  padSIMDBytes);

	for (uint32 threadIndex = 0; threadIndex < threadCount; threadIndex++)
		{

		fSrcBuffer [threadIndex] . Reset (allocator->Allocate (srcBufferSize));

		fDstBuffer [threadIndex] . Reset (allocator->Allocate (dstBufferSize));

		// Zero buffers so any pad bytes have defined values.

		DoZeroBytes (fSrcBuffer [threadIndex]->Buffer      (),
					 fSrcBuffer [threadIndex]->LogicalSize ());

		DoZeroBytes (fDstBuffer [threadIndex]->Buffer      (),
					 fDstBuffer [threadIndex]->LogicalSize ());

		}

	}

/*****************************************************************************/

void dng_filter_task::Process (uint32 threadIndex,
							   const dng_rect &area,
							   dng_abort_sniffer * /* sniffer */)
	{

	// Find source area for this destination area.

	dng_rect srcArea = SrcArea (area);

	// Safety check.

	int32 src_area_w;
	int32 src_area_h;

	if (!ConvertUint32ToInt32 (srcArea.W (),
							   &src_area_w) ||
		!ConvertUint32ToInt32 (srcArea.H (),
							   &src_area_h) ||
		src_area_w > fSrcTileSize.h ||
		src_area_h > fSrcTileSize.v)
		{

		ThrowMemoryFull ("Area exceeds tile size.");

		}

	// Setup srcBuffer.

	dng_pixel_buffer srcBuffer (srcArea,
								fSrcPlane,
								fSrcPlanes,
								fSrcPixelType,
								pcRowInterleavedAlignSIMD,
								fSrcBuffer [threadIndex]->Buffer ());

	// Setup dstBuffer.

	dng_pixel_buffer dstBuffer (area,
								fDstPlane,
								fDstPlanes,
								fDstPixelType,
								pcRowInterleavedAlignSIMD,
								fDstBuffer [threadIndex]->Buffer ());

	// Get source pixels.

	fSrcImage.Get (srcBuffer,
				   dng_image::edge_repeat,
				   fSrcRepeat.v,
				   fSrcRepeat.h);

	// Process area.

	ProcessArea (threadIndex,
				 srcBuffer,
				 dstBuffer);

	// Save result pixels.

	fDstImage.Put (dstBuffer);

	}

/*****************************************************************************/
