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kdegraphics3
kpdf-bug-487098.patch
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File kpdf-bug-487098.patch of Package kdegraphics3
--- kpdf/xpdf/xpdf/JBIG2Stream.h.sav 2007-05-14 09:39:30.000000000 +0200 +++ kpdf/xpdf/xpdf/JBIG2Stream.h 2009-04-22 18:47:47.000000000 +0200 @@ -78,6 +78,10 @@ private: Guint *refSegs, Guint nRefSegs); void readGenericRegionSeg(Guint segNum, GBool imm, GBool lossless, Guint length); + void mmrAddPixels(int a1, int blackPixels, + int *codingLine, int *a0i, int w); + void mmrAddPixelsNeg(int a1, int blackPixels, + int *codingLine, int *a0i, int w); JBIG2Bitmap *readGenericBitmap(GBool mmr, int w, int h, int templ, GBool tpgdOn, GBool useSkip, JBIG2Bitmap *skip, --- kpdf/xpdf/xpdf/JBIG2Stream.cc.sav 2008-08-19 20:12:37.000000000 +0200 +++ kpdf/xpdf/xpdf/JBIG2Stream.cc 2009-04-22 18:49:36.000000000 +0200 @@ -422,12 +422,14 @@ void JBIG2HuffmanDecoder::buildTable(JBI table[i] = table[len]; // assign prefixes - i = 0; - prefix = 0; - table[i++].prefix = prefix++; - for (; table[i].rangeLen != jbig2HuffmanEOT; ++i) { - prefix <<= table[i].prefixLen - table[i-1].prefixLen; - table[i].prefix = prefix++; + if (table[0].rangeLen != jbig2HuffmanEOT) { + i = 0; + prefix = 0; + table[i++].prefix = prefix++; + for (; table[i].rangeLen != jbig2HuffmanEOT; ++i) { + prefix <<= table[i].prefixLen - table[i-1].prefixLen; + table[i].prefix = prefix++; + } } } @@ -491,7 +493,7 @@ int JBIG2MMRDecoder::get2DCode() { } if (p->bits < 0) { error(str->getPos(), "Bad two dim code in JBIG2 MMR stream"); - return 0; + return EOF; } bufLen -= p->bits; return p->n; @@ -684,8 +686,9 @@ JBIG2Bitmap::JBIG2Bitmap(Guint segNumA, h = hA; line = (wA + 7) >> 3; if (w <= 0 || h <= 0 || line <= 0 || h >= (INT_MAX - 1) / line) { - data = NULL; - return; + // force a call to gmalloc(-1), which will throw an exception + h = -1; + line = 2; } // need to allocate one extra guard byte for use in combine() data = (Guchar *)gmalloc(h * line + 1); @@ -699,8 +702,9 @@ JBIG2Bitmap::JBIG2Bitmap(Guint segNumA, h = bitmap->h; line = bitmap->line; if (w <= 0 || h <= 0 || line <= 0 || h >= (INT_MAX - 1) / line) { - data = NULL; - return; + // force a call to gmalloc(-1), which will throw an exception + h = -1; + line = 2; } // need to allocate one extra guard byte for use in combine() data = (Guchar *)gmalloc(h * line + 1); @@ -755,6 +759,8 @@ void JBIG2Bitmap::clearToOne() { inline void JBIG2Bitmap::getPixelPtr(int x, int y, JBIG2BitmapPtr *ptr) { if (y < 0 || y >= h || x >= w) { ptr->p = NULL; + ptr->shift = 0; // make gcc happy + ptr->x = 0; // make gcc happy } else if (x < 0) { ptr->p = &data[y * line]; ptr->shift = 7; @@ -799,6 +805,10 @@ void JBIG2Bitmap::combine(JBIG2Bitmap *b Guint src0, src1, src, dest, s1, s2, m1, m2, m3; GBool oneByte; + // check for the pathological case where y = -2^31 + if (y < -0x7fffffff) { + return; + } if (y < 0) { y0 = -y; } else { @@ -1012,8 +1022,13 @@ private: JBIG2SymbolDict::JBIG2SymbolDict(Guint segNumA, Guint sizeA): JBIG2Segment(segNumA) { + Guint i; + size = sizeA; bitmaps = (JBIG2Bitmap **)gmallocn(size, sizeof(JBIG2Bitmap *)); + for (i = 0; i < size; ++i) { + bitmaps[i] = NULL; + } genericRegionStats = NULL; refinementRegionStats = NULL; } @@ -1022,7 +1037,9 @@ JBIG2SymbolDict::~JBIG2SymbolDict() { Guint i; for (i = 0; i < size; ++i) { - delete bitmaps[i]; + if (bitmaps[i]) { + delete bitmaps[i]; + } } gfree(bitmaps); if (genericRegionStats) { @@ -1301,6 +1318,13 @@ void JBIG2Stream::readSegments() { // keep track of the start of the segment data segDataPos = getPos(); + // check for missing page information segment + if (!pageBitmap && ((segType >= 4 && segType <= 7) || + (segType >= 20 && segType <= 43))) { + error(getPos(), "First JBIG2 segment associated with a page must be a page information segment"); + goto syntaxError; + } + // read the segment data switch (segType) { case 0: @@ -1455,6 +1479,8 @@ GBool JBIG2Stream::readSymbolDictSeg(Gui Guint i, j, k; Guchar *p; + symWidths = NULL; + // symbol dictionary flags if (!readUWord(&flags)) { goto eofError; @@ -1510,26 +1536,32 @@ GBool JBIG2Stream::readSymbolDictSeg(Gui codeTables = new GList(); numInputSyms = 0; for (i = 0; i < nRefSegs; ++i) { - // This is need by poppler bug 12014, returning gFalse makes it not crash - // but we end up with a empty page while acroread is able to render - // part of it if ((seg = findSegment(refSegs[i]))) { if (seg->getType() == jbig2SegSymbolDict) { - numInputSyms += ((JBIG2SymbolDict *)seg)->getSize(); + j = ((JBIG2SymbolDict *)seg)->getSize(); + if (numInputSyms > UINT_MAX - j) { + error(getPos(), "Too many input symbols in JBIG2 symbol dictionary"); + delete codeTables; + goto eofError; + } + numInputSyms += j; } else if (seg->getType() == jbig2SegCodeTable) { - codeTables->append(seg); + codeTables->append(seg); } - } else { - return gFalse; } } + if (numInputSyms > UINT_MAX - numNewSyms) { + error(getPos(), "Too many input symbols in JBIG2 symbol dictionary"); + delete codeTables; + goto eofError; + } // compute symbol code length - symCodeLen = 0; - i = 1; - while (i < numInputSyms + numNewSyms) { + symCodeLen = 1; + i = (numInputSyms + numNewSyms) >> 1; + while (i) { ++symCodeLen; - i <<= 1; + i >>= 1; } // get the input symbol bitmaps @@ -1541,11 +1573,12 @@ GBool JBIG2Stream::readSymbolDictSeg(Gui k = 0; inputSymbolDict = NULL; for (i = 0; i < nRefSegs; ++i) { - seg = findSegment(refSegs[i]); - if (seg->getType() == jbig2SegSymbolDict) { - inputSymbolDict = (JBIG2SymbolDict *)seg; - for (j = 0; j < inputSymbolDict->getSize(); ++j) { - bitmaps[k++] = inputSymbolDict->getBitmap(j); + if ((seg = findSegment(refSegs[i]))) { + if (seg->getType() == jbig2SegSymbolDict) { + inputSymbolDict = (JBIG2SymbolDict *)seg; + for (j = 0; j < inputSymbolDict->getSize(); ++j) { + bitmaps[k++] = inputSymbolDict->getBitmap(j); + } } } } @@ -1560,6 +1593,9 @@ GBool JBIG2Stream::readSymbolDictSeg(Gui } else if (huffDH == 1) { huffDHTable = huffTableE; } else { + if (i >= (Guint)codeTables->getLength()) { + goto codeTableError; + } huffDHTable = ((JBIG2CodeTable *)codeTables->get(i++))->getHuffTable(); } if (huffDW == 0) { @@ -1567,17 +1603,26 @@ GBool JBIG2Stream::readSymbolDictSeg(Gui } else if (huffDW == 1) { huffDWTable = huffTableC; } else { + if (i >= (Guint)codeTables->getLength()) { + goto codeTableError; + } huffDWTable = ((JBIG2CodeTable *)codeTables->get(i++))->getHuffTable(); } if (huffBMSize == 0) { huffBMSizeTable = huffTableA; } else { + if (i >= (Guint)codeTables->getLength()) { + goto codeTableError; + } huffBMSizeTable = ((JBIG2CodeTable *)codeTables->get(i++))->getHuffTable(); } if (huffAggInst == 0) { huffAggInstTable = huffTableA; } else { + if (i >= (Guint)codeTables->getLength()) { + goto codeTableError; + } huffAggInstTable = ((JBIG2CodeTable *)codeTables->get(i++))->getHuffTable(); } @@ -1610,7 +1655,6 @@ GBool JBIG2Stream::readSymbolDictSeg(Gui } // allocate symbol widths storage - symWidths = NULL; if (huff && !refAgg) { symWidths = (Guint *)gmallocn(numNewSyms, sizeof(Guint)); } @@ -1652,6 +1696,10 @@ GBool JBIG2Stream::readSymbolDictSeg(Gui goto syntaxError; } symWidth += dw; + if (i >= numNewSyms) { + error(getPos(), "Too many symbols in JBIG2 symbol dictionary"); + goto syntaxError; + } // using a collective bitmap, so don't read a bitmap here if (huff && !refAgg) { @@ -1688,6 +1736,10 @@ GBool JBIG2Stream::readSymbolDictSeg(Gui arithDecoder->decodeInt(&refDX, iardxStats); arithDecoder->decodeInt(&refDY, iardyStats); } + if (symID >= numInputSyms + i) { + error(getPos(), "Invalid symbol ID in JBIG2 symbol dictionary"); + goto syntaxError; + } refBitmap = bitmaps[symID]; bitmaps[numInputSyms + i] = readGenericRefinementRegion(symWidth, symHeight, @@ -1754,6 +1806,12 @@ GBool JBIG2Stream::readSymbolDictSeg(Gui } else { arithDecoder->decodeInt(&run, iaexStats); } + if (i + run > numInputSyms + numNewSyms || + (ex && j + run > numExSyms)) { + error(getPos(), "Too many exported symbols in JBIG2 symbol dictionary"); + delete symbolDict; + goto syntaxError; + } if (ex) { for (cnt = 0; cnt < run; ++cnt) { symbolDict->setBitmap(j++, bitmaps[i++]->copy()); @@ -1763,6 +1821,11 @@ GBool JBIG2Stream::readSymbolDictSeg(Gui } ex = !ex; } + if (j != numExSyms) { + error(getPos(), "Too few symbols in JBIG2 symbol dictionary"); + delete symbolDict; + goto syntaxError; + } for (i = 0; i < numNewSyms; ++i) { delete bitmaps[numInputSyms + i]; @@ -1785,6 +1848,10 @@ GBool JBIG2Stream::readSymbolDictSeg(Gui return gTrue; + codeTableError: + error(getPos(), "Missing code table in JBIG2 symbol dictionary"); + delete codeTables; + syntaxError: for (i = 0; i < numNewSyms; ++i) { if (bitmaps[numInputSyms + i]) { @@ -1887,6 +1954,8 @@ void JBIG2Stream::readTextRegionSeg(Guin } } else { error(getPos(), "Invalid segment reference in JBIG2 text region"); + delete codeTables; + return; } } symCodeLen = 0; @@ -1921,6 +1990,9 @@ void JBIG2Stream::readTextRegionSeg(Guin } else if (huffFS == 1) { huffFSTable = huffTableG; } else { + if (i >= (Guint)codeTables->getLength()) { + goto codeTableError; + } huffFSTable = ((JBIG2CodeTable *)codeTables->get(i++))->getHuffTable(); } if (huffDS == 0) { @@ -1930,6 +2002,9 @@ void JBIG2Stream::readTextRegionSeg(Guin } else if (huffDS == 2) { huffDSTable = huffTableJ; } else { + if (i >= (Guint)codeTables->getLength()) { + goto codeTableError; + } huffDSTable = ((JBIG2CodeTable *)codeTables->get(i++))->getHuffTable(); } if (huffDT == 0) { @@ -1939,6 +2014,9 @@ void JBIG2Stream::readTextRegionSeg(Guin } else if (huffDT == 2) { huffDTTable = huffTableM; } else { + if (i >= (Guint)codeTables->getLength()) { + goto codeTableError; + } huffDTTable = ((JBIG2CodeTable *)codeTables->get(i++))->getHuffTable(); } if (huffRDW == 0) { @@ -1946,6 +2024,9 @@ void JBIG2Stream::readTextRegionSeg(Guin } else if (huffRDW == 1) { huffRDWTable = huffTableO; } else { + if (i >= (Guint)codeTables->getLength()) { + goto codeTableError; + } huffRDWTable = ((JBIG2CodeTable *)codeTables->get(i++))->getHuffTable(); } if (huffRDH == 0) { @@ -1953,6 +2034,9 @@ void JBIG2Stream::readTextRegionSeg(Guin } else if (huffRDH == 1) { huffRDHTable = huffTableO; } else { + if (i >= (Guint)codeTables->getLength()) { + goto codeTableError; + } huffRDHTable = ((JBIG2CodeTable *)codeTables->get(i++))->getHuffTable(); } if (huffRDX == 0) { @@ -1960,6 +2044,9 @@ void JBIG2Stream::readTextRegionSeg(Guin } else if (huffRDX == 1) { huffRDXTable = huffTableO; } else { + if (i >= (Guint)codeTables->getLength()) { + goto codeTableError; + } huffRDXTable = ((JBIG2CodeTable *)codeTables->get(i++))->getHuffTable(); } if (huffRDY == 0) { @@ -1967,11 +2054,17 @@ void JBIG2Stream::readTextRegionSeg(Guin } else if (huffRDY == 1) { huffRDYTable = huffTableO; } else { + if (i >= (Guint)codeTables->getLength()) { + goto codeTableError; + } huffRDYTable = ((JBIG2CodeTable *)codeTables->get(i++))->getHuffTable(); } if (huffRSize == 0) { huffRSizeTable = huffTableA; } else { + if (i >= (Guint)codeTables->getLength()) { + goto codeTableError; + } huffRSizeTable = ((JBIG2CodeTable *)codeTables->get(i++))->getHuffTable(); } @@ -2066,8 +2159,15 @@ void JBIG2Stream::readTextRegionSeg(Guin return; + codeTableError: + error(getPos(), "Missing code table in JBIG2 text region"); + gfree(codeTables); + delete syms; + return; + eofError: error(getPos(), "Unexpected EOF in JBIG2 stream"); + return; } JBIG2Bitmap *JBIG2Stream::readTextRegion(GBool huff, GBool refine, @@ -2374,8 +2474,8 @@ void JBIG2Stream::readHalftoneRegionSeg( error(getPos(), "Bad symbol dictionary reference in JBIG2 halftone segment"); return; } - seg = findSegment(refSegs[0]); - if (seg->getType() != jbig2SegPatternDict) { + if (!(seg = findSegment(refSegs[0])) || + seg->getType() != jbig2SegPatternDict) { error(getPos(), "Bad symbol dictionary reference in JBIG2 halftone segment"); return; } @@ -2533,7 +2633,7 @@ void JBIG2Stream::readGenericRegionSeg(G // read the bitmap bitmap = readGenericBitmap(mmr, w, h, templ, tpgdOn, gFalse, - NULL, atx, aty, mmr ? 0 : length - 18); + NULL, atx, aty, mmr ? length - 18 : 0); // combine the region bitmap into the page bitmap if (imm) { @@ -2555,6 +2655,43 @@ void JBIG2Stream::readGenericRegionSeg(G error(getPos(), "Unexpected EOF in JBIG2 stream"); } +inline void JBIG2Stream::mmrAddPixels(int a1, int blackPixels, + int *codingLine, int *a0i, int w) { + if (a1 > codingLine[*a0i]) { + if (a1 > w) { + error(getPos(), "JBIG2 MMR row is wrong length ({0:d})", a1); + a1 = w; + } + if ((*a0i & 1) ^ blackPixels) { + ++*a0i; + } + codingLine[*a0i] = a1; + } +} + +inline void JBIG2Stream::mmrAddPixelsNeg(int a1, int blackPixels, + int *codingLine, int *a0i, int w) { + if (a1 > codingLine[*a0i]) { + if (a1 > w) { + error(getPos(), "JBIG2 MMR row is wrong length ({0:d})", a1); + a1 = w; + } + if ((*a0i & 1) ^ blackPixels) { + ++*a0i; + } + codingLine[*a0i] = a1; + } else if (a1 < codingLine[*a0i]) { + if (a1 < 0) { + error(getPos(), "Invalid JBIG2 MMR code"); + a1 = 0; + } + while (*a0i > 0 && a1 <= codingLine[*a0i - 1]) { + --*a0i; + } + codingLine[*a0i] = a1; + } +} + JBIG2Bitmap *JBIG2Stream::readGenericBitmap(GBool mmr, int w, int h, int templ, GBool tpgdOn, GBool useSkip, JBIG2Bitmap *skip, @@ -2567,7 +2704,7 @@ JBIG2Bitmap *JBIG2Stream::readGenericBit JBIG2BitmapPtr atPtr0, atPtr1, atPtr2, atPtr3; int *refLine, *codingLine; int code1, code2, code3; - int x, y, a0, pix, i, refI, codingI; + int x, y, a0i, b1i, blackPixels, pix, i; bitmap = new JBIG2Bitmap(0, w, h); bitmap->clearToZero(); @@ -2577,9 +2714,18 @@ JBIG2Bitmap *JBIG2Stream::readGenericBit if (mmr) { mmrDecoder->reset(); + if (w > INT_MAX - 2) { + error(getPos(), "Bad width in JBIG2 generic bitmap"); + // force a call to gmalloc(-1), which will throw an exception + w = -3; + } + // 0 <= codingLine[0] < codingLine[1] < ... < codingLine[n] = w + // ---> max codingLine size = w + 1 + // refLine has one extra guard entry at the end + // ---> max refLine size = w + 2 + codingLine = (int *)gmallocn(w + 1, sizeof(int)); refLine = (int *)gmallocn(w + 2, sizeof(int)); - codingLine = (int *)gmallocn(w + 2, sizeof(int)); - codingLine[0] = codingLine[1] = w; + codingLine[0] = w; for (y = 0; y < h; ++y) { @@ -2587,128 +2733,157 @@ JBIG2Bitmap *JBIG2Stream::readGenericBit for (i = 0; codingLine[i] < w; ++i) { refLine[i] = codingLine[i]; } - refLine[i] = refLine[i + 1] = w; + refLine[i++] = w; + refLine[i] = w; // decode a line - refI = 0; // b1 = refLine[refI] - codingI = 0; // a1 = codingLine[codingI] - a0 = 0; - do { + codingLine[0] = 0; + a0i = 0; + b1i = 0; + blackPixels = 0; + // invariant: + // refLine[b1i-1] <= codingLine[a0i] < refLine[b1i] < refLine[b1i+1] <= w + // exception at left edge: + // codingLine[a0i = 0] = refLine[b1i = 0] = 0 is possible + // exception at right edge: + // refLine[b1i] = refLine[b1i+1] = w is possible + while (codingLine[a0i] < w) { code1 = mmrDecoder->get2DCode(); switch (code1) { case twoDimPass: - if (refLine[refI] < w) { - a0 = refLine[refI + 1]; - refI += 2; - } - break; + mmrAddPixels(refLine[b1i + 1], blackPixels, codingLine, &a0i, w); + if (refLine[b1i + 1] < w) { + b1i += 2; + } + break; case twoDimHoriz: - if (codingI & 1) { - code1 = 0; - do { - code1 += code3 = mmrDecoder->getBlackCode(); - } while (code3 >= 64); - code2 = 0; - do { - code2 += code3 = mmrDecoder->getWhiteCode(); - } while (code3 >= 64); - } else { - code1 = 0; - do { - code1 += code3 = mmrDecoder->getWhiteCode(); - } while (code3 >= 64); - code2 = 0; - do { - code2 += code3 = mmrDecoder->getBlackCode(); - } while (code3 >= 64); - } - if (code1 > 0 || code2 > 0) { - a0 = codingLine[codingI++] = a0 + code1; - a0 = codingLine[codingI++] = a0 + code2; - while (refLine[refI] <= a0 && refLine[refI] < w) { - refI += 2; - } - } - break; - case twoDimVert0: - a0 = codingLine[codingI++] = refLine[refI]; - if (refLine[refI] < w) { - ++refI; - } - break; - case twoDimVertR1: - a0 = codingLine[codingI++] = refLine[refI] + 1; - if (refLine[refI] < w) { - ++refI; - while (refLine[refI] <= a0 && refLine[refI] < w) { - refI += 2; - } - } - break; - case twoDimVertR2: - a0 = codingLine[codingI++] = refLine[refI] + 2; - if (refLine[refI] < w) { - ++refI; - while (refLine[refI] <= a0 && refLine[refI] < w) { - refI += 2; - } - } - break; + code1 = code2 = 0; + if (blackPixels) { + do { + code1 += code3 = mmrDecoder->getBlackCode(); + } while (code3 >= 64); + do { + code2 += code3 = mmrDecoder->getWhiteCode(); + } while (code3 >= 64); + } else { + do { + code1 += code3 = mmrDecoder->getWhiteCode(); + } while (code3 >= 64); + do { + code2 += code3 = mmrDecoder->getBlackCode(); + } while (code3 >= 64); + } + mmrAddPixels(codingLine[a0i] + code1, blackPixels, + codingLine, &a0i, w); + if (codingLine[a0i] < w) { + mmrAddPixels(codingLine[a0i] + code2, blackPixels ^ 1, + codingLine, &a0i, w); + } + while (refLine[b1i] <= codingLine[a0i] && refLine[b1i] < w) { + b1i += 2; + } + break; case twoDimVertR3: - a0 = codingLine[codingI++] = refLine[refI] + 3; - if (refLine[refI] < w) { - ++refI; - while (refLine[refI] <= a0 && refLine[refI] < w) { - refI += 2; - } - } - break; - case twoDimVertL1: - a0 = codingLine[codingI++] = refLine[refI] - 1; - if (refI > 0) { - --refI; - } else { - ++refI; - } - while (refLine[refI] <= a0 && refLine[refI] < w) { - refI += 2; - } - break; - case twoDimVertL2: - a0 = codingLine[codingI++] = refLine[refI] - 2; - if (refI > 0) { - --refI; - } else { - ++refI; - } - while (refLine[refI] <= a0 && refLine[refI] < w) { - refI += 2; - } - break; + mmrAddPixels(refLine[b1i] + 3, blackPixels, codingLine, &a0i, w); + blackPixels ^= 1; + if (codingLine[a0i] < w) { + ++b1i; + while (refLine[b1i] <= codingLine[a0i] && refLine[b1i] < w) { + b1i += 2; + } + } + break; + case twoDimVertR2: + mmrAddPixels(refLine[b1i] + 2, blackPixels, codingLine, &a0i, w); + blackPixels ^= 1; + if (codingLine[a0i] < w) { + ++b1i; + while (refLine[b1i] <= codingLine[a0i] && refLine[b1i] < w) { + b1i += 2; + } + } + break; + case twoDimVertR1: + mmrAddPixels(refLine[b1i] + 1, blackPixels, codingLine, &a0i, w); + blackPixels ^= 1; + if (codingLine[a0i] < w) { + ++b1i; + while (refLine[b1i] <= codingLine[a0i] && refLine[b1i] < w) { + b1i += 2; + } + } + break; + case twoDimVert0: + mmrAddPixels(refLine[b1i], blackPixels, codingLine, &a0i, w); + blackPixels ^= 1; + if (codingLine[a0i] < w) { + ++b1i; + while (refLine[b1i] <= codingLine[a0i] && refLine[b1i] < w) { + b1i += 2; + } + } + break; case twoDimVertL3: - a0 = codingLine[codingI++] = refLine[refI] - 3; - if (refI > 0) { - --refI; - } else { - ++refI; - } - while (refLine[refI] <= a0 && refLine[refI] < w) { - refI += 2; - } - break; + mmrAddPixelsNeg(refLine[b1i] - 3, blackPixels, codingLine, &a0i, w); + blackPixels ^= 1; + if (codingLine[a0i] < w) { + if (b1i > 0) { + --b1i; + } else { + ++b1i; + } + while (refLine[b1i] <= codingLine[a0i] && refLine[b1i] < w) { + b1i += 2; + } + } + break; + case twoDimVertL2: + mmrAddPixelsNeg(refLine[b1i] - 2, blackPixels, codingLine, &a0i, w); + blackPixels ^= 1; + if (codingLine[a0i] < w) { + if (b1i > 0) { + --b1i; + } else { + ++b1i; + } + while (refLine[b1i] <= codingLine[a0i] && refLine[b1i] < w) { + b1i += 2; + } + } + break; + case twoDimVertL1: + mmrAddPixelsNeg(refLine[b1i] - 1, blackPixels, codingLine, &a0i, w); + blackPixels ^= 1; + if (codingLine[a0i] < w) { + if (b1i > 0) { + --b1i; + } else { + ++b1i; + } + while (refLine[b1i] <= codingLine[a0i] && refLine[b1i] < w) { + b1i += 2; + } + } + break; + case EOF: + mmrAddPixels(w, 0, codingLine, &a0i, w); + break; default: error(getPos(), "Illegal code in JBIG2 MMR bitmap data"); + mmrAddPixels(w, 0, codingLine, &a0i, w); break; } - } while (a0 < w); - codingLine[codingI++] = w; + } // convert the run lengths to a bitmap line i = 0; - while (codingLine[i] < w) { + while (1) { for (x = codingLine[i]; x < codingLine[i+1]; ++x) { bitmap->setPixel(x, y); } + if (codingLine[i+1] >= w || codingLine[i+2] >= w) { + break; + } i += 2; } } @@ -2756,7 +2931,9 @@ JBIG2Bitmap *JBIG2Stream::readGenericBit ltp = !ltp; } if (ltp) { - bitmap->duplicateRow(y, y-1); + if (y > 0) { + bitmap->duplicateRow(y, y-1); + } continue; } } @@ -2959,8 +3136,8 @@ void JBIG2Stream::readGenericRefinementR return; } if (nRefSegs == 1) { - seg = findSegment(refSegs[0]); - if (seg->getType() != jbig2SegBitmap) { + if (!(seg = findSegment(refSegs[0])) || + seg->getType() != jbig2SegBitmap) { error(getPos(), "Bad bitmap reference in JBIG2 generic refinement segment"); return; } @@ -3054,6 +3231,10 @@ JBIG2Bitmap *JBIG2Stream::readGenericRef tpgrCX2 = refBitmap->nextPixel(&tpgrCXPtr2); tpgrCX2 = (tpgrCX2 << 1) | refBitmap->nextPixel(&tpgrCXPtr2); tpgrCX2 = (tpgrCX2 << 1) | refBitmap->nextPixel(&tpgrCXPtr2); + } else { + tpgrCXPtr0.p = tpgrCXPtr1.p = tpgrCXPtr2.p = NULL; // make gcc happy + tpgrCXPtr0.shift = tpgrCXPtr1.shift = tpgrCXPtr2.shift = 0; + tpgrCXPtr0.x = tpgrCXPtr1.x = tpgrCXPtr2.x = 0; } for (x = 0; x < w; ++x) { @@ -3125,6 +3306,10 @@ JBIG2Bitmap *JBIG2Stream::readGenericRef tpgrCX2 = refBitmap->nextPixel(&tpgrCXPtr2); tpgrCX2 = (tpgrCX2 << 1) | refBitmap->nextPixel(&tpgrCXPtr2); tpgrCX2 = (tpgrCX2 << 1) | refBitmap->nextPixel(&tpgrCXPtr2); + } else { + tpgrCXPtr0.p = tpgrCXPtr1.p = tpgrCXPtr2.p = NULL; // make gcc happy + tpgrCXPtr0.shift = tpgrCXPtr1.shift = tpgrCXPtr2.shift = 0; + tpgrCXPtr0.x = tpgrCXPtr1.x = tpgrCXPtr2.x = 0; } for (x = 0; x < w; ++x) { --- kpdf/xpdf/goo/gmem.cc.sav 2008-02-13 10:37:05.000000000 +0100 +++ kpdf/xpdf/goo/gmem.cc 2009-04-22 18:47:47.000000000 +0200 @@ -55,7 +55,15 @@ void *gmalloc(int size) GMEM_EXCEP { void *data; unsigned long *trl, *p; - if (size <= 0) { + if (size < 0) { +#if USE_EXCEPTIONS + throw GMemException(); +#else + fprintf(stderr, "Invalid memory allocation size\n"); + exit(1); +#endif + } + if (size == 0) { return NULL; } size1 = gMemDataSize(size); @@ -91,7 +99,15 @@ void *gmalloc(int size) GMEM_EXCEP { #else void *p; - if (size <= 0) { + if (size < 0) { +#if USE_EXCEPTIONS + throw GMemException(); +#else + fprintf(stderr, "Invalid memory allocation size\n"); + exit(1); +#endif + } + if (size == 0) { return NULL; } if (!(p = malloc(size))) { @@ -112,7 +128,15 @@ void *grealloc(void *p, int size) GMEM_E void *q; int oldSize; - if (size <= 0) { + if (size < 0) { +#if USE_EXCEPTIONS + throw GMemException(); +#else + fprintf(stderr, "Invalid memory allocation size\n"); + exit(1); +#endif + } + if (size == 0) { if (p) { gfree(p); } @@ -131,7 +155,15 @@ void *grealloc(void *p, int size) GMEM_E #else void *q; - if (size <= 0) { + if (size < 0) { +#if USE_EXCEPTIONS + throw GMemException(); +#else + fprintf(stderr, "Invalid memory allocation size\n"); + exit(1); +#endif + } + if (size == 0) { if (p) { free(p); }
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