diff --git a/third_party/libtiff/tif_getimage.c b/third_party/libtiff/tif_getimage.c index 53c938a89..03c9a81fb 100644 --- a/third_party/libtiff/tif_getimage.c +++ b/third_party/libtiff/tif_getimage.c @@ -627,7 +627,7 @@ gtTileContig(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h) uint32 col, row, y, rowstoread; tmsize_t pos; uint32 tw, th; - unsigned char* buf; + unsigned char* buf = NULL; int32 fromskew, toskew; int64 safeskew; uint32 nrow; @@ -636,13 +636,14 @@ gtTileContig(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h) int32 this_toskew, leftmost_toskew; int32 leftmost_fromskew; uint32 leftmost_tw; + tmsize_t bufsize; - buf = (unsigned char*) _TIFFmalloc(TIFFTileSize(tif)); - if (buf == 0) { - TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "%s", "No space for tile buffer"); - return (0); + bufsize = TIFFTileSize(tif); + if (bufsize == 0) { + TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "%s", "No space for tile buffer"); + return (0); } - _TIFFmemset(buf, 0, TIFFTileSize(tif)); + TIFFGetField(tif, TIFFTAG_TILEWIDTH, &tw); TIFFGetField(tif, TIFFTAG_TILELENGTH, &th); @@ -691,8 +692,9 @@ gtTileContig(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h) col = img->col_offset; while (tocol < w) { - if (TIFFReadTile(tif, buf, col, - row+img->row_offset, 0, 0)==(tmsize_t)(-1) && img->stoponerr) + if (_TIFFReadTileAndAllocBuffer(tif, (void**) &buf, bufsize, col, + row+img->row_offset, 0, 0)==(tmsize_t)(-1) && + (buf == NULL || img->stoponerr)) { ret = 0; break; @@ -772,11 +774,11 @@ gtTileSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h) uint32 col, row, y, rowstoread; tmsize_t pos; uint32 tw, th; - unsigned char* buf; - unsigned char* p0; - unsigned char* p1; - unsigned char* p2; - unsigned char* pa; + unsigned char* buf = NULL; + unsigned char* p0 = NULL; + unsigned char* p1 = NULL; + unsigned char* p2 = NULL; + unsigned char* pa = NULL; tmsize_t tilesize; tmsize_t bufsize; int32 fromskew, toskew; @@ -795,16 +797,7 @@ gtTileSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h) TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "Integer overflow in %s", "gtTileSeparate"); return (0); } - buf = (unsigned char*) _TIFFmalloc(bufsize); - if (buf == 0) { - TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "%s", "No space for tile buffer"); - return (0); - } - _TIFFmemset(buf, 0, bufsize); - p0 = buf; - p1 = p0 + tilesize; - p2 = p1 + tilesize; - pa = (alpha?(p2+tilesize):NULL); + TIFFGetField(tif, TIFFTAG_TILEWIDTH, &tw); TIFFGetField(tif, TIFFTAG_TILELENGTH, &th); @@ -824,7 +817,6 @@ gtTileSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h) case PHOTOMETRIC_MINISBLACK: case PHOTOMETRIC_PALETTE: colorchannels = 1; - p2 = p1 = p0; break; default: @@ -849,7 +841,30 @@ gtTileSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h) col = img->col_offset; while (tocol < w) { - if (TIFFReadTile(tif, p0, col, + if( buf == NULL ) + { + if (_TIFFReadTileAndAllocBuffer( + tif, (void**) &buf, bufsize, col, + row+img->row_offset,0,0)==(tmsize_t)(-1) + && (buf == NULL || img->stoponerr)) + { + ret = 0; + break; + } + p0 = buf; + if( colorchannels == 1 ) + { + p2 = p1 = p0; + pa = (alpha?(p0+3*tilesize):NULL); + } + else + { + p1 = p0 + tilesize; + p2 = p1 + tilesize; + pa = (alpha?(p2+tilesize):NULL); + } + } + else if (TIFFReadTile(tif, p0, col, row+img->row_offset,0,0)==(tmsize_t)(-1) && img->stoponerr) { ret = 0; @@ -940,13 +955,14 @@ gtStripContig(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h) tileContigRoutine put = img->put.contig; uint32 row, y, nrow, nrowsub, rowstoread; tmsize_t pos; - unsigned char* buf; + unsigned char* buf = NULL; uint32 rowsperstrip; uint16 subsamplinghor,subsamplingver; uint32 imagewidth = img->width; tmsize_t scanline; int32 fromskew, toskew; int ret = 1, flip; + tmsize_t maxstripsize; TIFFGetFieldDefaulted(tif, TIFFTAG_YCBCRSUBSAMPLING, &subsamplinghor, &subsamplingver); if( subsamplingver == 0 ) { @@ -954,12 +970,7 @@ gtStripContig(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h) return (0); } - buf = (unsigned char*) _TIFFmalloc(TIFFStripSize(tif)); - if (buf == 0) { - TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "No space for strip buffer"); - return (0); - } - _TIFFmemset(buf, 0, TIFFStripSize(tif)); + maxstripsize = TIFFStripSize(tif); flip = setorientation(img); if (flip & FLIP_VERTICALLY) { @@ -981,11 +992,12 @@ gtStripContig(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h) nrowsub = nrow; if ((nrowsub%subsamplingver)!=0) nrowsub+=subsamplingver-nrowsub%subsamplingver; - if (TIFFReadEncodedStrip(tif, + if (_TIFFReadEncodedStripAndAllocBuffer(tif, TIFFComputeStrip(tif,row+img->row_offset, 0), - buf, + (void**)(&buf), + maxstripsize, ((row + img->row_offset)%rowsperstrip + nrowsub) * scanline)==(tmsize_t)(-1) - && img->stoponerr) + && (buf == NULL || img->stoponerr)) { ret = 0; break; @@ -1029,8 +1041,8 @@ gtStripSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h) { TIFF* tif = img->tif; tileSeparateRoutine put = img->put.separate; - unsigned char *buf; - unsigned char *p0, *p1, *p2, *pa; + unsigned char *buf = NULL; + unsigned char *p0 = NULL, *p1 = NULL, *p2 = NULL, *pa = NULL; uint32 row, y, nrow, rowstoread; tmsize_t pos; tmsize_t scanline; @@ -1049,15 +1061,6 @@ gtStripSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h) TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "Integer overflow in %s", "gtStripSeparate"); return (0); } - p0 = buf = (unsigned char *)_TIFFmalloc(bufsize); - if (buf == 0) { - TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "No space for tile buffer"); - return (0); - } - _TIFFmemset(buf, 0, bufsize); - p1 = p0 + stripsize; - p2 = p1 + stripsize; - pa = (alpha?(p2+stripsize):NULL); flip = setorientation(img); if (flip & FLIP_VERTICALLY) { @@ -1075,7 +1078,6 @@ gtStripSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h) case PHOTOMETRIC_MINISBLACK: case PHOTOMETRIC_PALETTE: colorchannels = 1; - p2 = p1 = p0; break; default: @@ -1091,7 +1093,31 @@ gtStripSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h) rowstoread = rowsperstrip - (row + img->row_offset) % rowsperstrip; nrow = (row + rowstoread > h ? h - row : rowstoread); offset_row = row + img->row_offset; - if (TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, offset_row, 0), + if( buf == NULL ) + { + if (_TIFFReadEncodedStripAndAllocBuffer( + tif, TIFFComputeStrip(tif, offset_row, 0), + (void**) &buf, bufsize, + ((row + img->row_offset)%rowsperstrip + nrow) * scanline)==(tmsize_t)(-1) + && (buf == NULL || img->stoponerr)) + { + ret = 0; + break; + } + p0 = buf; + if( colorchannels == 1 ) + { + p2 = p1 = p0; + pa = (alpha?(p0+3*stripsize):NULL); + } + else + { + p1 = p0 + stripsize; + p2 = p1 + stripsize; + pa = (alpha?(p2+stripsize):NULL); + } + } + else if (TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, offset_row, 0), p0, ((row + img->row_offset)%rowsperstrip + nrow) * scanline)==(tmsize_t)(-1) && img->stoponerr) { diff --git a/third_party/libtiff/tif_read.c b/third_party/libtiff/tif_read.c index cc4f5d2f6..ad0a778c0 100644 --- a/third_party/libtiff/tif_read.c +++ b/third_party/libtiff/tif_read.c @@ -442,18 +442,17 @@ TIFFReadScanline(TIFF* tif, void* buf, uint32 row, uint16 sample) } /* - * Read a strip of data and decompress the specified - * amount into the user-supplied buffer. + * Calculate the strip size according to the number of + * rows in the strip (check for truncated last strip on any + * of the separations). */ -tmsize_t -TIFFReadEncodedStrip(TIFF* tif, uint32 strip, void* buf, tmsize_t size) +static tmsize_t TIFFReadEncodedStripGetStripSize(TIFF* tif, uint32 strip, uint16* pplane) { static const char module[] = "TIFFReadEncodedStrip"; TIFFDirectory *td = &tif->tif_dir; uint32 rowsperstrip; uint32 stripsperplane; uint32 stripinplane; - uint16 plane; uint32 rows; tmsize_t stripsize; if (!TIFFCheckRead(tif,0)) @@ -465,23 +464,37 @@ TIFFReadEncodedStrip(TIFF* tif, uint32 strip, void* buf, tmsize_t size) (unsigned long)td->td_nstrips); return((tmsize_t)(-1)); } - /* - * Calculate the strip size according to the number of - * rows in the strip (check for truncated last strip on any - * of the separations). - */ + rowsperstrip=td->td_rowsperstrip; if (rowsperstrip>td->td_imagelength) rowsperstrip=td->td_imagelength; stripsperplane= TIFFhowmany_32_maxuint_compat(td->td_imagelength, rowsperstrip); stripinplane=(strip%stripsperplane); - plane=(uint16)(strip/stripsperplane); + if( pplane ) *pplane=(uint16)(strip/stripsperplane); rows=td->td_imagelength-stripinplane*rowsperstrip; if (rows>rowsperstrip) rows=rowsperstrip; stripsize=TIFFVStripSize(tif,rows); if (stripsize==0) return((tmsize_t)(-1)); + return stripsize; +} + +/* + * Read a strip of data and decompress the specified + * amount into the user-supplied buffer. + */ +tmsize_t +TIFFReadEncodedStrip(TIFF* tif, uint32 strip, void* buf, tmsize_t size) +{ + static const char module[] = "TIFFReadEncodedStrip"; + TIFFDirectory *td = &tif->tif_dir; + tmsize_t stripsize; + uint16 plane; + + stripsize=TIFFReadEncodedStripGetStripSize(tif, strip, &plane); + if (stripsize==((tmsize_t)(-1))) + return((tmsize_t)(-1)); /* shortcut to avoid an extra memcpy() */ if( td->td_compression == COMPRESSION_NONE && @@ -510,6 +523,50 @@ TIFFReadEncodedStrip(TIFF* tif, uint32 strip, void* buf, tmsize_t size) return(stripsize); } +/* Variant of TIFFReadEncodedStrip() that does + * * if *buf == NULL, *buf = _TIFFmalloc(bufsizetoalloc) only after TIFFFillStrip() has + * suceeded. This avoid excessive memory allocation in case of truncated + * file. + * * calls regular TIFFReadEncodedStrip() if *buf != NULL + */ +tmsize_t +_TIFFReadEncodedStripAndAllocBuffer(TIFF* tif, uint32 strip, + void **buf, tmsize_t bufsizetoalloc, + tmsize_t size_to_read) +{ + tmsize_t this_stripsize; + uint16 plane; + + if( *buf != NULL ) + { + return TIFFReadEncodedStrip(tif, strip, *buf, size_to_read); + } + + this_stripsize=TIFFReadEncodedStripGetStripSize(tif, strip, &plane); + if (this_stripsize==((tmsize_t)(-1))) + return((tmsize_t)(-1)); + + if ((size_to_read!=(tmsize_t)(-1))&&(size_to_read<this_stripsize)) + this_stripsize=size_to_read; + if (!TIFFFillStrip(tif,strip)) + return((tmsize_t)(-1)); + + *buf = _TIFFmalloc(bufsizetoalloc); + if (*buf == NULL) { + TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "No space for strip buffer"); + return((tmsize_t)(-1)); + } + _TIFFmemset(*buf, 0, bufsizetoalloc); + + if ((*tif->tif_decodestrip)(tif,*buf,this_stripsize,plane)<=0) + return((tmsize_t)(-1)); + (*tif->tif_postdecode)(tif,*buf,this_stripsize); + return(this_stripsize); + + +} + + static tmsize_t TIFFReadRawStrip1(TIFF* tif, uint32 strip, void* buf, tmsize_t size, const char* module) @@ -939,6 +996,78 @@ TIFFReadEncodedTile(TIFF* tif, uint32 tile, void* buf, tmsize_t size) return ((tmsize_t)(-1)); } +/* Variant of TIFFReadTile() that does + * * if *buf == NULL, *buf = _TIFFmalloc(bufsizetoalloc) only after TIFFFillTile() has + * suceeded. This avoid excessive memory allocation in case of truncated + * file. + * * calls regular TIFFReadEncodedTile() if *buf != NULL + */ +tmsize_t +_TIFFReadTileAndAllocBuffer(TIFF* tif, + void **buf, tmsize_t bufsizetoalloc, + uint32 x, uint32 y, uint32 z, uint16 s) +{ + if (!TIFFCheckRead(tif, 1) || !TIFFCheckTile(tif, x, y, z, s)) + return ((tmsize_t)(-1)); + return (_TIFFReadEncodedTileAndAllocBuffer(tif, + TIFFComputeTile(tif, x, y, z, s), + buf, bufsizetoalloc, + (tmsize_t)(-1))); +} + +/* Variant of TIFFReadEncodedTile() that does + * * if *buf == NULL, *buf = _TIFFmalloc(bufsizetoalloc) only after TIFFFillTile() has + * suceeded. This avoid excessive memory allocation in case of truncated + * file. + * * calls regular TIFFReadEncodedTile() if *buf != NULL + */ +tmsize_t +_TIFFReadEncodedTileAndAllocBuffer(TIFF* tif, uint32 tile, + void **buf, tmsize_t bufsizetoalloc, + tmsize_t size_to_read) +{ + static const char module[] = "_TIFFReadEncodedTileAndAllocBuffer"; + TIFFDirectory *td = &tif->tif_dir; + tmsize_t tilesize = tif->tif_tilesize; + + if( *buf != NULL ) + { + return TIFFReadEncodedTile(tif, tile, *buf, size_to_read); + } + + if (!TIFFCheckRead(tif, 1)) + return ((tmsize_t)(-1)); + if (tile >= td->td_nstrips) { + TIFFErrorExt(tif->tif_clientdata, module, + "%lu: Tile out of range, max %lu", + (unsigned long) tile, (unsigned long) td->td_nstrips); + return ((tmsize_t)(-1)); + } + + if (!TIFFFillTile(tif,tile)) + return((tmsize_t)(-1)); + + *buf = _TIFFmalloc(bufsizetoalloc); + if (*buf == NULL) { + TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), + "No space for tile buffer"); + return((tmsize_t)(-1)); + } + _TIFFmemset(*buf, 0, bufsizetoalloc); + + if (size_to_read == (tmsize_t)(-1)) + size_to_read = tilesize; + else if (size_to_read > tilesize) + size_to_read = tilesize; + if( (*tif->tif_decodetile)(tif, + (uint8*) *buf, size_to_read, (uint16)(tile/td->td_stripsperimage))) { + (*tif->tif_postdecode)(tif, (uint8*) *buf, size_to_read); + return (size_to_read); + } else + return ((tmsize_t)(-1)); +} + + static tmsize_t TIFFReadRawTile1(TIFF* tif, uint32 tile, void* buf, tmsize_t size, const char* module) { diff --git a/third_party/libtiff/tiffiop.h b/third_party/libtiff/tiffiop.h index 7e415c750..6fb47de5b 100644 --- a/third_party/libtiff/tiffiop.h +++ b/third_party/libtiff/tiffiop.h @@ -364,6 +364,20 @@ extern void* _TIFFCheckRealloc(TIFF*, void*, tmsize_t, tmsize_t, const char*); extern double _TIFFUInt64ToDouble(uint64); extern float _TIFFUInt64ToFloat(uint64); +extern tmsize_t +_TIFFReadEncodedStripAndAllocBuffer(TIFF* tif, uint32 strip, + void **buf, tmsize_t bufsizetoalloc, + tmsize_t size_to_read); +extern tmsize_t +_TIFFReadEncodedTileAndAllocBuffer(TIFF* tif, uint32 tile, + void **buf, tmsize_t bufsizetoalloc, + tmsize_t size_to_read); +extern tmsize_t +_TIFFReadTileAndAllocBuffer(TIFF* tif, + void **buf, tmsize_t bufsizetoalloc, + uint32 x, uint32 y, uint32 z, uint16 s); + + extern int TIFFInitDumpMode(TIFF*, int); #ifdef PACKBITS_SUPPORT extern int TIFFInitPackBits(TIFF*, int);