/**
 * FreeRDP: A Remote Desktop Protocol Implementation
 * Interleaved RLE Bitmap Codec
 *
 * Copyright 2014 Marc-Andre Moreau <marcandre.moreau@gmail.com>
 * Copyright 2015 Thincast Technologies GmbH
 * Copyright 2015 DI (FH) Martin Haimberger <martin.haimberger@thincast.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 <freerdp/codec/interleaved.h>
#include <freerdp/log.h>

#define TAG FREERDP_TAG("codec")

/*
   RLE Compressed Bitmap Stream (RLE_BITMAP_STREAM)
   http://msdn.microsoft.com/en-us/library/cc240895%28v=prot.10%29.aspx
   pseudo-code
   http://msdn.microsoft.com/en-us/library/dd240593%28v=prot.10%29.aspx
*/

#define REGULAR_BG_RUN              0x00
#define MEGA_MEGA_BG_RUN            0xF0
#define REGULAR_FG_RUN              0x01
#define MEGA_MEGA_FG_RUN            0xF1
#define LITE_SET_FG_FG_RUN          0x0C
#define MEGA_MEGA_SET_FG_RUN        0xF6
#define LITE_DITHERED_RUN           0x0E
#define MEGA_MEGA_DITHERED_RUN      0xF8
#define REGULAR_COLOR_RUN           0x03
#define MEGA_MEGA_COLOR_RUN         0xF3
#define REGULAR_FGBG_IMAGE          0x02
#define MEGA_MEGA_FGBG_IMAGE        0xF2
#define LITE_SET_FG_FGBG_IMAGE      0x0D
#define MEGA_MEGA_SET_FGBG_IMAGE    0xF7
#define REGULAR_COLOR_IMAGE         0x04
#define MEGA_MEGA_COLOR_IMAGE       0xF4
#define SPECIAL_FGBG_1              0xF9
#define SPECIAL_FGBG_2              0xFA
#define SPECIAL_WHITE               0xFD
#define SPECIAL_BLACK               0xFE

#define BLACK_PIXEL 0x000000
#define WHITE_PIXEL 0xFFFFFF

typedef UINT32 PIXEL;

static const BYTE g_MaskBit0 = 0x01; /* Least significant bit */
static const BYTE g_MaskBit1 = 0x02;
static const BYTE g_MaskBit2 = 0x04;
static const BYTE g_MaskBit3 = 0x08;
static const BYTE g_MaskBit4 = 0x10;
static const BYTE g_MaskBit5 = 0x20;
static const BYTE g_MaskBit6 = 0x40;
static const BYTE g_MaskBit7 = 0x80; /* Most significant bit */

static const BYTE g_MaskSpecialFgBg1 = 0x03;
static const BYTE g_MaskSpecialFgBg2 = 0x05;

static const BYTE g_MaskRegularRunLength = 0x1F;
static const BYTE g_MaskLiteRunLength = 0x0F;

/**
 * Reads the supplied order header and extracts the compression
 * order code ID.
 */
static INLINE UINT32 ExtractCodeId(BYTE bOrderHdr)
{
	if ((bOrderHdr & 0xC0U) != 0xC0U) {
		/* REGULAR orders
		 * (000x xxxx, 001x xxxx, 010x xxxx, 011x xxxx, 100x xxxx)
		 */
		return bOrderHdr >> 5;
	}
	else if ((bOrderHdr & 0xF0U) == 0xF0U) {
		/* MEGA and SPECIAL orders (0xF*) */
		return bOrderHdr;
	}
	else {
		/* LITE orders
		 * 1100 xxxx, 1101 xxxx, 1110 xxxx)
		 */
		return bOrderHdr >> 4;
	}
}

/**
 * Extract the run length of a compression order.
 */
static INLINE UINT32 ExtractRunLength(UINT32 code, const BYTE* pbOrderHdr, UINT32* advance)
{
	UINT32 runLength;
	UINT32 ladvance;

	ladvance = 1;
	runLength = 0;
	switch (code)
	{
	case REGULAR_FGBG_IMAGE:
		runLength = (*pbOrderHdr) & g_MaskRegularRunLength;
		if (runLength == 0)
		{
			runLength = (*(pbOrderHdr + 1)) + 1;
			ladvance += 1;
		}
		else
		{
			runLength = runLength * 8;
		}
		break;
	case LITE_SET_FG_FGBG_IMAGE:
		runLength = (*pbOrderHdr) & g_MaskLiteRunLength;
		if (runLength == 0)
		{
			runLength = (*(pbOrderHdr + 1)) + 1;
			ladvance += 1;
		}
		else
		{
			runLength = runLength * 8;
		}
		break;
	case REGULAR_BG_RUN:
	case REGULAR_FG_RUN:
	case REGULAR_COLOR_RUN:
	case REGULAR_COLOR_IMAGE:
		runLength = (*pbOrderHdr) & g_MaskRegularRunLength;
		if (runLength == 0)
		{
			/* An extended (MEGA) run. */
			runLength = (*(pbOrderHdr + 1)) + 32;
			ladvance += 1;
		}
		break;
	case LITE_SET_FG_FG_RUN:
	case LITE_DITHERED_RUN:
		runLength = (*pbOrderHdr) & g_MaskLiteRunLength;
		if (runLength == 0)
		{
			/* An extended (MEGA) run. */
			runLength = (*(pbOrderHdr + 1)) + 16;
			ladvance += 1;
		}
		break;
	case MEGA_MEGA_BG_RUN:
	case MEGA_MEGA_FG_RUN:
	case MEGA_MEGA_SET_FG_RUN:
	case MEGA_MEGA_DITHERED_RUN:
	case MEGA_MEGA_COLOR_RUN:
	case MEGA_MEGA_FGBG_IMAGE:
	case MEGA_MEGA_SET_FGBG_IMAGE:
	case MEGA_MEGA_COLOR_IMAGE:
		runLength = ((UINT16) pbOrderHdr[1]) | ((UINT16) (pbOrderHdr[2] << 8));
		ladvance += 2;
		break;
	}
	*advance = ladvance;
	return runLength;
}

#define UNROLL_COUNT 4
#define UNROLL(_exp) do { _exp _exp _exp _exp } while (0)

#undef DESTWRITEPIXEL
#undef DESTREADPIXEL
#undef SRCREADPIXEL
#undef DESTNEXTPIXEL
#undef SRCNEXTPIXEL
#undef WRITEFGBGIMAGE
#undef WRITEFIRSTLINEFGBGIMAGE
#undef RLEDECOMPRESS
#undef RLEEXTRA
#define DESTWRITEPIXEL(_buf, _pix) (_buf)[0] = (BYTE)(_pix)
#define DESTREADPIXEL(_pix, _buf) _pix = (_buf)[0]
#define SRCREADPIXEL(_pix, _buf) _pix = (_buf)[0]
#define DESTNEXTPIXEL(_buf) _buf += 1
#define SRCNEXTPIXEL(_buf) _buf += 1
#define WRITEFGBGIMAGE WriteFgBgImage8to8
#define WRITEFIRSTLINEFGBGIMAGE WriteFirstLineFgBgImage8to8
#define RLEDECOMPRESS RleDecompress8to8
#define RLEEXTRA
#include "include/bitmap.c"

#undef DESTWRITEPIXEL
#undef DESTREADPIXEL
#undef SRCREADPIXEL
#undef DESTNEXTPIXEL
#undef SRCNEXTPIXEL
#undef WRITEFGBGIMAGE
#undef WRITEFIRSTLINEFGBGIMAGE
#undef RLEDECOMPRESS
#undef RLEEXTRA
#define DESTWRITEPIXEL(_buf, _pix) ((UINT16*)(_buf))[0] = (UINT16)(_pix)
#define DESTREADPIXEL(_pix, _buf) _pix = ((UINT16*)(_buf))[0]
#ifdef HAVE_ALIGNED_REQUIRED
#define SRCREADPIXEL(_pix, _buf) _pix = (_buf)[0] | ((_buf)[1] << 8)
#else
#define SRCREADPIXEL(_pix, _buf) _pix = ((UINT16*)(_buf))[0]
#endif
#define DESTNEXTPIXEL(_buf) _buf += 2
#define SRCNEXTPIXEL(_buf) _buf += 2
#define WRITEFGBGIMAGE WriteFgBgImage16to16
#define WRITEFIRSTLINEFGBGIMAGE WriteFirstLineFgBgImage16to16
#define RLEDECOMPRESS RleDecompress16to16
#define RLEEXTRA
#include "include/bitmap.c"

#undef DESTWRITEPIXEL
#undef DESTREADPIXEL
#undef SRCREADPIXEL
#undef DESTNEXTPIXEL
#undef SRCNEXTPIXEL
#undef WRITEFGBGIMAGE
#undef WRITEFIRSTLINEFGBGIMAGE
#undef RLEDECOMPRESS
#undef RLEEXTRA
#define DESTWRITEPIXEL(_buf, _pix) do { (_buf)[0] = (BYTE)(_pix);  \
	(_buf)[1] = (BYTE)((_pix) >> 8); (_buf)[2] = (BYTE)((_pix) >> 16); } while (0)
#define DESTREADPIXEL(_pix, _buf) _pix = (_buf)[0] | ((_buf)[1] << 8) | \
	((_buf)[2] << 16)
#define SRCREADPIXEL(_pix, _buf) _pix = (_buf)[0] | ((_buf)[1] << 8) | \
	((_buf)[2] << 16)
#define DESTNEXTPIXEL(_buf) _buf += 3
#define SRCNEXTPIXEL(_buf) _buf += 3
#define WRITEFGBGIMAGE WriteFgBgImage24to24
#define WRITEFIRSTLINEFGBGIMAGE WriteFirstLineFgBgImage24to24
#define RLEDECOMPRESS RleDecompress24to24
#define RLEEXTRA
#include "include/bitmap.c"

INT32 interleaved_decompress(BITMAP_INTERLEAVED_CONTEXT* interleaved,
				 const BYTE* pSrcData, UINT32 SrcSize,
				 UINT32 bpp,
				 BYTE* pDstData, UINT32 DstFormat,
				 UINT32 nDstStep, UINT32 nXDst, UINT32 nYDst,
				 UINT32 nWidth, UINT32 nHeight,
				 const gdiPalette* palette)
{
	INT32 status;
	UINT32 scanline;
	UINT32 SrcFormat;
	UINT32 BufferSize;
	UINT32 dstBitsPerPixel;
	UINT32 dstBytesPerPixel;

	dstBitsPerPixel = GetBitsPerPixel(DstFormat);
	dstBytesPerPixel = GetBytesPerPixel(DstFormat);

	if (!interleaved)
		return -1;

	if (nDstStep <= 0)
		nDstStep = nWidth * dstBytesPerPixel;

	switch(bpp)
	{
	case 24:
		scanline = nWidth * 3;
		SrcFormat = PIXEL_FORMAT_BGR24_VF;
		break;
	case 16:
		scanline = nWidth * 2;
		SrcFormat = PIXEL_FORMAT_RGB16_VF;
		break;
	case 15:
		scanline = nWidth * 2;
		SrcFormat = PIXEL_FORMAT_RGB15_VF;
		break;
	case 8:
		scanline = nWidth;
		SrcFormat = PIXEL_FORMAT_RGB8_VF;
		break;
	default:
		WLog_ERR(TAG, "Invalid color depth %d", bpp);
		return -1;
	}

	BufferSize = scanline * nHeight;
	if (BufferSize > interleaved->TempSize)
	{
		interleaved->TempBuffer = _aligned_realloc(
						  interleaved->TempBuffer,
						  BufferSize, 16);
		interleaved->TempSize = BufferSize;
	}

	if (!interleaved->TempBuffer)
		return -1;

	switch(bpp)
	{
	case 24:
		RleDecompress24to24(pSrcData, SrcSize, interleaved->TempBuffer,
					scanline, nWidth, nHeight);
		break;
	case 16:
	case 15:
		RleDecompress16to16(pSrcData, SrcSize, interleaved->TempBuffer,
					scanline, nWidth, nHeight);
		break;
	case 8:
		RleDecompress8to8(pSrcData, SrcSize, interleaved->TempBuffer,
				  scanline, nWidth, nHeight);
		break;
	default:
		return -1;
	}

	status = freerdp_image_copy(pDstData, DstFormat, nDstStep, nXDst, nYDst,
					nWidth, nHeight, interleaved->TempBuffer,
					SrcFormat, scanline, 0, 0, palette);

	return status;
}

BOOL interleaved_compress(BITMAP_INTERLEAVED_CONTEXT* interleaved,
			  BYTE* pDstData, UINT32* pDstSize,
			  UINT32 nWidth, UINT32 nHeight,
			  const BYTE* pSrcData, UINT32 SrcFormat,
			  UINT32 nSrcStep, UINT32 nXSrc, UINT32 nYSrc,
			  const gdiPalette* palette, UINT32 bpp)
{
	int status;
	wStream* s;
	UINT32 DstFormat = 0;
	int maxSize = 64 * 64 * 4;

	if (nWidth % 4)
	{
		WLog_ERR(TAG, "interleaved_compress: width is not a multiple of 4");
		return FALSE;
	}

	if ((nWidth > 64) || (nHeight > 64))
	{
		WLog_ERR(TAG, "interleaved_compress: width (%d) or height (%d) is greater than 64", nWidth, nHeight);
		return FALSE;
	}

	if (bpp == 24)
		DstFormat = PIXEL_FORMAT_XRGB32;
	else if (bpp == 16)
		DstFormat = PIXEL_FORMAT_RGB16;
	else if (bpp == 15)
		DstFormat = PIXEL_FORMAT_RGB15;
	else if (bpp == 8)
		DstFormat = PIXEL_FORMAT_RGB8;

	if (!DstFormat)
		return FALSE;

	status = freerdp_image_copy(interleaved->TempBuffer, DstFormat, 0, 0, 0, nWidth, nHeight,
					pSrcData, SrcFormat, nSrcStep, nXSrc, nYSrc, palette);

	s = Stream_New(pDstData, maxSize);

	if (!s)
		return FALSE;

	status = freerdp_bitmap_compress((char*) interleaved->TempBuffer, nWidth, nHeight,
					 s, bpp, maxSize, nHeight - 1, interleaved->bts, 0);

	Stream_SealLength(s);
	*pDstSize = (UINT32) Stream_Length(s);

	Stream_Free(s, FALSE);

	return status;
}

BOOL bitmap_interleaved_context_reset(BITMAP_INTERLEAVED_CONTEXT* interleaved)
{
	if (!interleaved)
		return FALSE;

	return TRUE;
}

BITMAP_INTERLEAVED_CONTEXT* bitmap_interleaved_context_new(BOOL Compressor)
{
	BITMAP_INTERLEAVED_CONTEXT* interleaved;

	interleaved = (BITMAP_INTERLEAVED_CONTEXT*) calloc(1, sizeof(BITMAP_INTERLEAVED_CONTEXT));

	if (interleaved)
	{
		interleaved->TempSize = 64 * 64 * 4;
		interleaved->TempBuffer = _aligned_malloc(interleaved->TempSize, 16);
		if (!interleaved->TempBuffer)
		{
			free(interleaved);
			WLog_ERR(TAG, "_aligned_malloc failed!");
			return NULL;
		}
		interleaved->bts = Stream_New(NULL, interleaved->TempSize);

		if (!interleaved->bts)
		{
			_aligned_free(interleaved->TempBuffer);
			free(interleaved);
			WLog_ERR(TAG, "Stream_New failed!");
			return NULL;
		}
	}

	return interleaved;
}

void bitmap_interleaved_context_free(BITMAP_INTERLEAVED_CONTEXT* interleaved)
{
	if (!interleaved)
		return;

	_aligned_free(interleaved->TempBuffer);
	Stream_Free(interleaved->bts, TRUE);

	free(interleaved);
}