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FreeRDP/libfreerdp/codec/clear.c

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/**
* FreeRDP: A Remote Desktop Protocol Implementation
* ClearCodec Bitmap Compression
*
* 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 <winpr/crt.h>
#include <winpr/print.h>
#include <winpr/bitstream.h>
#include <freerdp/codec/color.h>
#include <freerdp/codec/clear.h>
#include <freerdp/log.h>
#define TAG FREERDP_TAG("codec.clear")
static const UINT32 CLEAR_LOG2_FLOOR[256] =
{
0, 0, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3,
4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5,
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7,
7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7
};
static const BYTE CLEAR_8BIT_MASKS[9] =
{
0x00, 0x01, 0x03, 0x07, 0x0F, 0x1F, 0x3F, 0x7F, 0xFF
};
static void convert_color(BYTE* dst, UINT32 nDstStep, UINT32 DstFormat,
UINT32 nXDst, UINT32 nYDst, UINT32 nWidth, UINT32 nHeight,
const BYTE* src, UINT32 nSrcStep, UINT32 SrcFormat,
UINT32 nDstWidth, UINT32 nDstHeight, const gdiPalette* palette)
{
UINT32 x, y;
if (nWidth + nXDst > nDstWidth)
nWidth = nDstWidth - nXDst;
if (nHeight + nYDst > nDstHeight)
nHeight = nDstHeight - nYDst;
for (y = 0; y < nHeight; y++)
{
const BYTE* pSrcLine = &src[y * nSrcStep];
BYTE* pDstLine = &dst[(nYDst + y) * nDstStep];
for (x = 0; x < nWidth; x++)
{
const BYTE* pSrcPixel =
&pSrcLine[x * GetBytesPerPixel(SrcFormat)];
BYTE* pDstPixel =
&pDstLine[(nXDst + x) * GetBytesPerPixel(DstFormat)];
UINT32 color = ReadColor(pSrcPixel, SrcFormat);
color = ConvertColor(color, SrcFormat,
DstFormat, palette);
WriteColor(pDstPixel, DstFormat, color);
}
}
}
static BOOL clear_decompress_nscodec(NSC_CONTEXT* nsc, UINT32 width,
UINT32 height,
wStream* s, UINT32 bitmapDataByteCount,
BYTE* pDstData, UINT32 DstFormat, UINT32 nDstStep,
UINT32 nXDstRel, UINT32 nYDstRel)
{
BOOL rc;
if (Stream_GetRemainingLength(s) < bitmapDataByteCount)
return FALSE;
rc = nsc_process_message(nsc, 32, width, height, Stream_Pointer(s),
bitmapDataByteCount, pDstData, DstFormat,
nDstStep, nXDstRel, nYDstRel, width, height);
Stream_Seek(s, bitmapDataByteCount);
return rc;
}
static BOOL clear_decompress_subcode_rlex(wStream* s,
UINT32 bitmapDataByteCount,
UINT32 width, UINT32 height,
BYTE* pDstData, UINT32 DstFormat, UINT32 nDstStep,
UINT32 nXDstRel, UINT32 nYDstRel, UINT32 nDstWidth, UINT32 nDstHeight)
{
UINT32 x = 0, y = 0;
UINT32 i;
UINT32 SrcFormat = PIXEL_FORMAT_BGR24;
UINT32 pixelCount;
UINT32 nSrcStep;
UINT32 bitmapDataOffset;
UINT32 pixelIndex;
UINT32 numBits;
BYTE startIndex;
BYTE stopIndex;
BYTE suiteIndex;
BYTE suiteDepth;
BYTE paletteCount;
UINT32 palette[128];
if (Stream_GetRemainingLength(s) < bitmapDataByteCount)
return FALSE;
Stream_Read_UINT8(s, paletteCount);
bitmapDataOffset = 1 + (paletteCount * 3);
if (paletteCount > 127)
return FALSE;
for (i = 0; i < paletteCount; i++)
{
BYTE r, g, b;
Stream_Read_UINT8(s, b);
Stream_Read_UINT8(s, g);
Stream_Read_UINT8(s, r);
UINT32 color = GetColor(SrcFormat, r, g, b, 0xFF);
palette[i] = ConvertColor(color, SrcFormat, DstFormat, NULL);
}
pixelIndex = 0;
pixelCount = width * height;
numBits = CLEAR_LOG2_FLOOR[paletteCount - 1] + 1;
while (bitmapDataOffset < bitmapDataByteCount)
{
UINT32 tmp;
UINT32 color;
UINT32 runLengthFactor;
if (Stream_GetRemainingLength(s) < 2)
return FALSE;
Stream_Read_UINT8(s, tmp);
Stream_Read_UINT8(s, runLengthFactor);
bitmapDataOffset += 2;
suiteDepth = (tmp >> numBits) & CLEAR_8BIT_MASKS[(8 - numBits)];
stopIndex = tmp & CLEAR_8BIT_MASKS[numBits];
startIndex = stopIndex - suiteDepth;
if (runLengthFactor >= 0xFF)
{
if (Stream_GetRemainingLength(s) < 2)
return FALSE;
Stream_Read_UINT16(s, runLengthFactor);
bitmapDataOffset += 2;
if (runLengthFactor >= 0xFFFF)
{
if (Stream_GetRemainingLength(s) < 4)
return FALSE;
Stream_Read_UINT32(s, runLengthFactor);
bitmapDataOffset += 4;
}
}
if (startIndex >= paletteCount)
return FALSE;
if (stopIndex >= paletteCount)
return FALSE;
suiteIndex = startIndex;
color = palette[suiteIndex];
if ((pixelIndex + runLengthFactor) > pixelCount)
return FALSE;
for (i = 0; i < runLengthFactor; i++)
{
BYTE* pTmpData = &pDstData[(nXDstRel + x) * GetBytesPerPixel(DstFormat) +
(nYDstRel + y) * nDstStep];
if ((nXDstRel + x < nDstWidth) && (nYDstRel + y < nDstHeight))
WriteColor(pTmpData, DstFormat, color);
if (++x >= width)
{
y++;
x = 0;
}
}
pixelIndex += runLengthFactor;
if ((pixelIndex + (suiteDepth + 1)) > pixelCount)
return FALSE;
for (i = 0; i <= suiteDepth; i++)
{
BYTE* pTmpData = &pDstData[(nXDstRel + x) * GetBytesPerPixel(DstFormat) +
(nYDstRel + y) * nDstStep];
UINT32 color = palette[suiteIndex++];
if ((nXDstRel + x < nDstWidth) && (nYDstRel + y < nDstHeight))
WriteColor(pTmpData, DstFormat, color);
if (++x >= width)
{
y++;
x = 0;
}
}
pixelIndex += (suiteDepth + 1);
}
nSrcStep = width * GetBytesPerPixel(DstFormat);
if (pixelIndex != pixelCount)
return FALSE;
return TRUE;
}
static BOOL clear_decompress_residual_data(CLEAR_CONTEXT* clear,
wStream* s,
UINT32 residualByteCount,
UINT32 nWidth, UINT32 nHeight,
BYTE* pDstData, UINT32 DstFormat, UINT32 nDstStep,
UINT32 nXDst, UINT32 nYDst,
UINT32 nDstWidth, UINT32 nDstHeight,
const gdiPalette* palette)
{
UINT32 i;
UINT32 nSrcStep;
UINT32 suboffset;
BYTE* dstBuffer;
UINT32 pixelIndex;
UINT32 pixelCount;
if (Stream_GetRemainingLength(s) < residualByteCount)
return FALSE;
suboffset = 0;
pixelIndex = 0;
pixelCount = nWidth * nHeight;
dstBuffer = clear->TempBuffer;
while (suboffset < residualByteCount)
{
BYTE r, g, b;
UINT32 runLengthFactor;
UINT32 color;
if (Stream_GetRemainingLength(s) < 4)
return FALSE;
Stream_Read_UINT8(s, b);
Stream_Read_UINT8(s, g);
Stream_Read_UINT8(s, r);
Stream_Read_UINT8(s, runLengthFactor);
suboffset += 4;
color = GetColor(clear->format, r, g, b, 0xFF);
if (runLengthFactor >= 0xFF)
{
if (Stream_GetRemainingLength(s) < 2)
return FALSE;
Stream_Read_UINT16(s, runLengthFactor);
suboffset += 2;
if (runLengthFactor >= 0xFFFF)
{
if (Stream_GetRemainingLength(s) < 4)
return FALSE;
Stream_Read_UINT32(s, runLengthFactor);
suboffset += 4;
}
}
if ((pixelIndex + runLengthFactor) > pixelCount)
return FALSE;
for (i = 0; i < runLengthFactor; i++)
{
WriteColor(dstBuffer, clear->format, color);
dstBuffer += GetBytesPerPixel(clear->format);
}
pixelIndex += runLengthFactor;
}
nSrcStep = nWidth * GetBytesPerPixel(clear->format);
if (pixelIndex != pixelCount)
return -1019;
convert_color(pDstData, nDstStep, DstFormat,
nXDst, nYDst, nWidth, nHeight,
clear->TempBuffer, nSrcStep, clear->format,
nDstWidth, nDstHeight, palette);
return TRUE;
}
static BOOL clear_decompress_subcodecs_data(CLEAR_CONTEXT* clear, wStream* s,
UINT32 subcodecByteCount, UINT32 nWidth, UINT32 nHeight,
BYTE* pDstData, UINT32 DstFormat, UINT32 nDstStep,
UINT32 nXDst, UINT32 nYDst, UINT32 nDstWidth, UINT32 nDstHeight,
const gdiPalette* palette)
{
UINT16 xStart;
UINT16 yStart;
UINT16 width;
UINT16 height;
UINT32 bitmapDataByteCount;
BYTE subcodecId;
UINT32 suboffset;
if (Stream_GetRemainingLength(s) < subcodecByteCount)
return FALSE;
suboffset = 0;
while (suboffset < subcodecByteCount)
{
UINT32 nXDstRel;
UINT32 nYDstRel;
if (Stream_GetRemainingLength(s) < 13)
return FALSE;
Stream_Read_UINT16(s, xStart);
Stream_Read_UINT16(s, yStart);
Stream_Read_UINT16(s, width);
Stream_Read_UINT16(s, height);
Stream_Read_UINT32(s, bitmapDataByteCount);
Stream_Read_UINT8(s, subcodecId);
suboffset += 13;
if (Stream_GetRemainingLength(s) < bitmapDataByteCount)
return FALSE;
nXDstRel = nXDst + xStart;
nYDstRel = nYDst + yStart;
if (width > nWidth)
return FALSE;
if (height > nHeight)
return FALSE;
if ((width * height * GetBytesPerPixel(clear->format)) >
clear->TempSize)
{
clear->TempSize = (width * height * GetBytesPerPixel(clear->format));
clear->TempBuffer = (BYTE*) realloc(clear->TempBuffer, clear->TempSize);
if (!clear->TempBuffer)
return FALSE;
}
switch (subcodecId)
{
case 0: /* Uncompressed */
{
UINT32 nSrcStep = width * GetBytesPerPixel(PIXEL_FORMAT_BGR24);;
UINT32 nSrcSize = nSrcStep * height;
if (bitmapDataByteCount != nSrcSize)
return FALSE;
convert_color(pDstData, nDstStep, DstFormat,
nXDstRel, nYDstRel, width, height,
Stream_Pointer(s), nSrcStep,
PIXEL_FORMAT_BGR24,
nDstWidth, nDstHeight, palette);
Stream_Seek(s, bitmapDataByteCount);
}
break;
case 1: /* NSCodec */
if (!clear_decompress_nscodec(clear->nsc, width, height,
s, bitmapDataByteCount,
pDstData, DstFormat, nDstStep,
nXDstRel, nYDstRel))
return FALSE;
break;
case 2: /* CLEARCODEC_SUBCODEC_RLEX */
if (!clear_decompress_subcode_rlex(s,
bitmapDataByteCount,
width, height,
pDstData, DstFormat, nDstStep,
nXDstRel, nYDstRel,
nDstWidth, nDstHeight))
return FALSE;
break;
default:
return FALSE;
}
suboffset += bitmapDataByteCount;
}
return TRUE;
}
static BOOL resize_vbar_entry(CLEAR_CONTEXT* clear, CLEAR_VBAR_ENTRY* vBarEntry)
{
if (vBarEntry->count > vBarEntry->size)
{
const UINT32 bpp = GetBytesPerPixel(clear->format);
const UINT32 oldPos = vBarEntry->size * bpp;
const UINT32 diffSize = (vBarEntry->count - vBarEntry->size) * bpp;
BYTE* tmp;
vBarEntry->size = vBarEntry->count;
tmp = (BYTE*) realloc(vBarEntry->pixels,
vBarEntry->count * bpp);
if (!tmp)
return FALSE;
memset(&tmp[oldPos], 0, diffSize);
vBarEntry->pixels = tmp;
}
if (!vBarEntry->pixels && vBarEntry->size)
return FALSE;
return TRUE;
}
static BOOL clear_decompress_bands_data(CLEAR_CONTEXT* clear,
wStream* s, UINT32 bandsByteCount,
UINT32 nWidth, UINT32 nHeight,
BYTE* pDstData, UINT32 DstFormat, UINT32 nDstStep,
UINT32 nXDst, UINT32 nYDst)
{
UINT32 i, y;
UINT32 count;
UINT32 suboffset;
UINT32 nXDstRel;
UINT32 nYDstRel;
if (Stream_GetRemainingLength(s) < bandsByteCount)
return FALSE;
suboffset = 0;
while (suboffset < bandsByteCount)
{
BYTE r, g, b;
UINT16 xStart;
UINT16 xEnd;
UINT16 yStart;
UINT16 yEnd;
UINT32 colorBkg;
UINT16 vBarHeader;
UINT16 vBarIndex;
UINT16 vBarYOn;
UINT16 vBarYOff;
UINT32 vBarCount;
UINT32 vBarPixelCount;
UINT32 vBarShortPixelCount;
if (Stream_GetRemainingLength(s) < 11)
return FALSE;
Stream_Read_UINT16(s, xStart);
Stream_Read_UINT16(s, xEnd);
Stream_Read_UINT16(s, yStart);
Stream_Read_UINT16(s, yEnd);
Stream_Read_UINT8(s, b);
Stream_Read_UINT8(s, g);
Stream_Read_UINT8(s, r);
suboffset += 11;
colorBkg = GetColor(clear->format, r, g, b, 0xFF);
if (xEnd < xStart)
return FALSE;
if (yEnd < yStart)
return FALSE;
vBarCount = (xEnd - xStart) + 1;
for (i = 0; i < vBarCount; i++)
{
UINT32 vBarHeight;
CLEAR_VBAR_ENTRY* vBarEntry = NULL;
CLEAR_VBAR_ENTRY* vBarShortEntry;
BOOL vBarUpdate = FALSE;
const BYTE* pSrcPixel;
if (Stream_GetRemainingLength(s) < 2)
return FALSE;
Stream_Read_UINT16(s, vBarHeader);;
suboffset += 2;
vBarHeight = (yEnd - yStart + 1);
if (vBarHeight > 52)
return FALSE;
if ((vBarHeader & 0xC000) == 0x4000) /* SHORT_VBAR_CACHE_HIT */
{
vBarIndex = (vBarHeader & 0x3FFF);
vBarShortEntry = &(clear->ShortVBarStorage[vBarIndex]);
if (!vBarShortEntry)
return FALSE;
if (Stream_GetRemainingLength(s) < 1)
return FALSE;
Stream_Read_UINT8(s, vBarYOn);
suboffset += 1;
vBarShortPixelCount = vBarShortEntry->count;
vBarUpdate = TRUE;
}
else if ((vBarHeader & 0xC000) == 0x0000) /* SHORT_VBAR_CACHE_MISS */
{
vBarYOn = (vBarHeader & 0xFF);
vBarYOff = ((vBarHeader >> 8) & 0x3F);
if (vBarYOff < vBarYOn)
return FALSE;
vBarShortPixelCount = (vBarYOff - vBarYOn);
if (vBarShortPixelCount > 52)
return FALSE;
if (Stream_GetRemainingLength(s) < (vBarShortPixelCount * 3))
return FALSE;
if (clear->ShortVBarStorageCursor >= CLEARCODEC_VBAR_SHORT_SIZE)
return FALSE;
vBarShortEntry = &(clear->ShortVBarStorage[clear->ShortVBarStorageCursor]);
vBarShortEntry->count = vBarShortPixelCount;
if (!resize_vbar_entry(clear, vBarShortEntry))
return FALSE;
for (y = 0; y < vBarShortPixelCount; y++)
{
BYTE r, g, b;
BYTE* dstBuffer =
&vBarShortEntry->pixels[y * GetBytesPerPixel(clear->format)];
UINT32 color;
Stream_Read_UINT8(s, b);
Stream_Read_UINT8(s, g);
Stream_Read_UINT8(s, r);
color = GetColor(clear->format, r, g, b, 0xFF);
WriteColor(dstBuffer, clear->format, color);
}
suboffset += (vBarShortPixelCount * 3);
vBarShortEntry->count = vBarShortPixelCount;
clear->ShortVBarStorageCursor =
(clear->ShortVBarStorageCursor + 1) % CLEARCODEC_VBAR_SHORT_SIZE;
vBarUpdate = TRUE;
}
else if ((vBarHeader & 0x8000) == 0x8000) /* VBAR_CACHE_HIT */
{
vBarIndex = (vBarHeader & 0x7FFF);
vBarEntry = &(clear->VBarStorage[vBarIndex]);
}
else
{
return FALSE; /* invalid vBarHeader */
}
if (vBarUpdate)
{
UINT32 x;
BYTE* pSrcPixel;
BYTE* dstBuffer;
if (clear->VBarStorageCursor >= CLEARCODEC_VBAR_SIZE)
return FALSE;
vBarEntry = &(clear->VBarStorage[clear->VBarStorageCursor]);
vBarPixelCount = vBarHeight;
vBarEntry->count = vBarPixelCount;
if (!resize_vbar_entry(clear, vBarEntry))
return FALSE;
dstBuffer = vBarEntry->pixels;
/* if (y < vBarYOn), use colorBkg */
y = 0;
count = vBarYOn;
if ((y + count) > vBarPixelCount)
count = (vBarPixelCount > y) ? (vBarPixelCount - y) : 0;
while (count--)
{
WriteColor(dstBuffer, clear->format, colorBkg);
dstBuffer += GetBytesPerPixel(clear->format);
}
/*
* if ((y >= vBarYOn) && (y < (vBarYOn + vBarShortPixelCount))),
* use vBarShortPixels at index (y - shortVBarYOn)
*/
y = vBarYOn;
count = vBarShortPixelCount;
if ((y + count) > vBarPixelCount)
count = (vBarPixelCount > y) ? (vBarPixelCount - y) : 0;
pSrcPixel = &vBarShortEntry->pixels[(y - vBarYOn) * GetBytesPerPixel(
clear->format)];
for (x = 0; x < count; x++)
{
UINT32 color;
color = ReadColor(&vBarShortEntry->pixels[x * GetBytesPerPixel(clear->format)],
clear->format);
WriteColor(dstBuffer, clear->format, color);
dstBuffer += GetBytesPerPixel(clear->format);
}
/* if (y >= (vBarYOn + vBarShortPixelCount)), use colorBkg */
y = vBarYOn + vBarShortPixelCount;
count = (vBarPixelCount > y) ? (vBarPixelCount - y) : 0;
while (count--)
{
WriteColor(dstBuffer, clear->format, colorBkg);
dstBuffer += GetBytesPerPixel(clear->format);
}
vBarEntry->count = vBarPixelCount;
clear->VBarStorageCursor = (clear->VBarStorageCursor + 1) %
CLEARCODEC_VBAR_SIZE;
}
if (vBarEntry->count != vBarHeight)
return FALSE;
nXDstRel = nXDst + xStart;
nYDstRel = nYDst + yStart;
pSrcPixel = vBarEntry->pixels;
if (i < nWidth)
{
count = vBarEntry->count;
if (count > nHeight)
count = nHeight;
for (y = 0; y < count; y++)
{
BYTE* pDstPixel8 = &pDstData[((nYDstRel + y) * nDstStep) +
((nXDstRel + i) * GetBytesPerPixel(DstFormat))];
UINT32 color = ReadColor(pSrcPixel, clear->format);
color = ConvertColor(color, clear->format,
DstFormat, NULL);
WriteColor(pDstPixel8, DstFormat, color);
pSrcPixel += GetBytesPerPixel(clear->format);
}
}
}
}
return TRUE;
}
static BOOL clear_decompress_glyph_data(CLEAR_CONTEXT* clear,
wStream* s, UINT32 glyphFlags,
UINT32 nWidth, UINT32 nHeight,
BYTE* pDstData, UINT32 DstFormat, UINT32 nDstStep,
UINT32 nXDst, UINT32 nYDst,
UINT32 nDstWidth, UINT32 nDstHeight,
const gdiPalette* palette)
{
UINT16 glyphIndex = 0;
if ((glyphFlags & CLEARCODEC_FLAG_GLYPH_HIT) &&
!(glyphFlags & CLEARCODEC_FLAG_GLYPH_INDEX))
{
WLog_ERR(TAG, "Invalid glyph flags %08X", glyphFlags);
return FALSE;
}
if ((glyphFlags & CLEARCODEC_FLAG_GLYPH_INDEX) == 0)
return TRUE;
if ((nWidth * nHeight) > (1024 * 1024))
{
WLog_ERR(TAG, "glyph too large: %ux%u", nWidth, nHeight);
return FALSE;
}
if (Stream_GetRemainingLength(s) < 2)
return FALSE;
Stream_Read_UINT16(s, glyphIndex);
if (glyphIndex >= 4000)
{
WLog_ERR(TAG, "Invalid glyphIndex %u", glyphIndex);
return FALSE;
}
if (glyphFlags & CLEARCODEC_FLAG_GLYPH_HIT)
{
UINT32 nSrcStep;
CLEAR_GLYPH_ENTRY* glyphEntry = &(clear->GlyphCache[glyphIndex]);
BYTE* glyphData = (BYTE*) glyphEntry->pixels;
if (!glyphData)
return FALSE;
if ((nWidth * nHeight) > (int) glyphEntry->count)
return FALSE;
nSrcStep = nWidth * GetBytesPerPixel(clear->format);
convert_color(pDstData, nDstStep, DstFormat,
nXDst, nYDst, nWidth, nHeight,
glyphData, nSrcStep, clear->format,
nDstWidth, nDstHeight, palette);
return TRUE;
}
if (glyphFlags & CLEARCODEC_FLAG_GLYPH_INDEX)
{
BYTE* glyphData;
UINT32 nSrcStep;
CLEAR_GLYPH_ENTRY* glyphEntry = &(clear->GlyphCache[glyphIndex]);
glyphEntry->count = nWidth * nHeight;
if (glyphEntry->count > glyphEntry->size)
{
UINT32* tmp;
glyphEntry->size = glyphEntry->count;
tmp = (UINT32*) realloc(glyphEntry->pixels, glyphEntry->size * 4);
if (!tmp)
return FALSE;
glyphEntry->pixels = tmp;
}
if (!glyphEntry->pixels)
return FALSE;
glyphData = (BYTE*) glyphEntry->pixels;
nSrcStep = nWidth * GetBytesPerPixel(clear->format);
convert_color(pDstData, nDstStep, DstFormat,
nXDst, nYDst, nWidth, nHeight,
glyphData, nSrcStep, clear->format,
nDstWidth, nDstHeight, palette);
}
return TRUE;
}
INT32 clear_decompress(CLEAR_CONTEXT* clear, const BYTE* pSrcData,
UINT32 SrcSize, UINT32 nWidth, UINT32 nHeight,
BYTE* pDstData, UINT32 DstFormat, UINT32 nDstStep,
UINT32 nXDst, UINT32 nYDst, UINT32 nDstWidth,
UINT32 nDstHeight, const gdiPalette* palette)
{
INT32 rc = -1;
BYTE seqNumber;
BYTE glyphFlags;
UINT32 residualByteCount;
UINT32 bandsByteCount;
UINT32 subcodecByteCount;
wStream* s;
if (!pDstData)
return -1002;
if ((nDstWidth == 0) || (nDstHeight == 0))
return -1022;
if ((nWidth > 0xFFFF) || (nHeight > 0xFFFF))
return -1004;
s = Stream_New((BYTE*)pSrcData, SrcSize);
if (!s)
return -2005;
Stream_SetLength(s, SrcSize);
if (Stream_GetRemainingLength(s) < 2)
goto fail;
Stream_Read_UINT8(s, glyphFlags);
Stream_Read_UINT8(s, seqNumber);
if (!clear->seqNumber && seqNumber)
clear->seqNumber = seqNumber;
if (seqNumber != clear->seqNumber)
{
WLog_ERR(TAG, "Sequence number unexpected %u - %u",
seqNumber, clear->seqNumber);
goto fail;
}
clear->seqNumber = (seqNumber + 1) % 256;
if (glyphFlags & CLEARCODEC_FLAG_CACHE_RESET)
{
clear->VBarStorageCursor = 0;
clear->ShortVBarStorageCursor = 0;
}
if (!clear_decompress_glyph_data(clear, s, glyphFlags, nWidth,
nHeight, pDstData, DstFormat,
nDstStep, nXDst, nYDst,
nDstWidth, nDstHeight, palette))
goto fail;
/* Read composition payload header parameters */
if (Stream_GetRemainingLength(s) < 12)
{
const UINT32 mask = (CLEARCODEC_FLAG_GLYPH_HIT | CLEARCODEC_FLAG_GLYPH_INDEX);
if ((glyphFlags & mask) == mask)
goto finish;
goto fail;
}
Stream_Read_UINT32(s, residualByteCount);
Stream_Read_UINT32(s, bandsByteCount);
Stream_Read_UINT32(s, subcodecByteCount);
if (residualByteCount > 0)
{
if (!clear_decompress_residual_data(clear, s, residualByteCount, nWidth,
nHeight, pDstData, DstFormat, nDstStep, nXDst, nYDst,
nDstWidth, nDstHeight, palette))
goto fail;
}
if (bandsByteCount > 0)
{
if (!clear_decompress_bands_data(clear, s, bandsByteCount, nWidth, nHeight,
pDstData, DstFormat, nDstStep, nXDst, nYDst))
goto fail;
}
if (subcodecByteCount > 0)
{
if (!clear_decompress_subcodecs_data(clear, s, subcodecByteCount, nWidth,
nHeight, pDstData, DstFormat,
nDstStep, nXDst, nYDst,
nDstWidth, nDstHeight, palette))
goto fail;
}
finish:
rc = 0;
fail:
Stream_Free(s, FALSE);
return rc;
}
int clear_compress(CLEAR_CONTEXT* clear, BYTE* pSrcData, UINT32 SrcSize,
BYTE** ppDstData, UINT32* pDstSize)
{
return 1;
}
BOOL clear_context_reset(CLEAR_CONTEXT* clear)
{
if (!clear)
return FALSE;
clear->seqNumber = 0;
clear->VBarStorageCursor = 0;
clear->ShortVBarStorageCursor = 0;
return TRUE;
}
CLEAR_CONTEXT* clear_context_new(BOOL Compressor)
{
CLEAR_CONTEXT* clear;
clear = (CLEAR_CONTEXT*) calloc(1, sizeof(CLEAR_CONTEXT));
if (!clear)
return NULL;
clear->Compressor = Compressor;
clear->nsc = nsc_context_new();
clear->format = PIXEL_FORMAT_BGRX32;
if (!clear->nsc)
goto error_nsc;
nsc_context_set_pixel_format(clear->nsc, PIXEL_FORMAT_RGB24);
clear->TempSize = 512 * 512 * 4;
clear->TempBuffer = (BYTE*) malloc(clear->TempSize);
clear_context_reset(clear);
return clear;
error_nsc:
free(clear);
return NULL;
}
void clear_context_free(CLEAR_CONTEXT* clear)
{
int i;
if (!clear)
return;
nsc_context_free(clear->nsc);
free(clear->TempBuffer);
for (i = 0; i < 4000; i++)
free(clear->GlyphCache[i].pixels);
for (i = 0; i < 32768; i++)
free(clear->VBarStorage[i].pixels);
for (i = 0; i < 16384; i++)
free(clear->ShortVBarStorage[i].pixels);
free(clear);
}
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