XFA: Upgrade to libtiff 4.0.6.

R=jun_fang@foxitsoftware.com, tsepez@chromium.org

Review URL: https://codereview.chromium.org/1563103002 .

1 files changed, 0 insertions, 1426 deletions

diff --git a/third_party/tiff_v403/tif_pixarlog.c b/third_party/tiff_v403/tif_pixarlog.c
deleted file mode 100644
index b30e6d4e9b..0000000000
--- a/third_party/tiff_v403/tif_pixarlog.c
+++ /dev/null
@@ -1,1426 +0,0 @@
-/* $Id: tif_pixarlog.c,v 1.38 2012-06-21 01:01:53 fwarmerdam Exp $ */
-
-/*
- * Copyright (c) 1996-1997 Sam Leffler
- * Copyright (c) 1996 Pixar
- *
- * Permission to use, copy, modify, distribute, and sell this software and 
- * its documentation for any purpose is hereby granted without fee, provided
- * that (i) the above copyright notices and this permission notice appear in
- * all copies of the software and related documentation, and (ii) the names of
- * Pixar, Sam Leffler and Silicon Graphics may not be used in any advertising or
- * publicity relating to the software without the specific, prior written
- * permission of Pixar, Sam Leffler and Silicon Graphics.
- * 
- * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, 
- * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY 
- * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  
- * 
- * IN NO EVENT SHALL PIXAR, SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
- * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
- * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF 
- * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE 
- * OF THIS SOFTWARE.
- */
-#include "tiffiop.h"
-#ifdef PIXARLOG_SUPPORT
-
-/*
- * TIFF Library.
- * PixarLog Compression Support
- *
- * Contributed by Dan McCoy.
- *
- * PixarLog film support uses the TIFF library to store companded
- * 11 bit values into a tiff file, which are compressed using the 
- * zip compressor.  
- *
- * The codec can take as input and produce as output 32-bit IEEE float values 
- * as well as 16-bit or 8-bit unsigned integer values.
- *
- * On writing any of the above are converted into the internal
- * 11-bit log format.   In the case of  8 and 16 bit values, the
- * input is assumed to be unsigned linear color values that represent
- * the range 0-1.  In the case of IEEE values, the 0-1 range is assumed to
- * be the normal linear color range, in addition over 1 values are
- * accepted up to a value of about 25.0 to encode "hot" hightlights and such.
- * The encoding is lossless for 8-bit values, slightly lossy for the
- * other bit depths.  The actual color precision should be better
- * than the human eye can perceive with extra room to allow for
- * error introduced by further image computation.  As with any quantized
- * color format, it is possible to perform image calculations which
- * expose the quantization error. This format should certainly be less 
- * susceptable to such errors than standard 8-bit encodings, but more
- * susceptable than straight 16-bit or 32-bit encodings.
- *
- * On reading the internal format is converted to the desired output format.
- * The program can request which format it desires by setting the internal
- * pseudo tag TIFFTAG_PIXARLOGDATAFMT to one of these possible values:
- *  PIXARLOGDATAFMT_FLOAT     = provide IEEE float values.
- *  PIXARLOGDATAFMT_16BIT     = provide unsigned 16-bit integer values
- *  PIXARLOGDATAFMT_8BIT      = provide unsigned 8-bit integer values
- *
- * alternately PIXARLOGDATAFMT_8BITABGR provides unsigned 8-bit integer
- * values with the difference that if there are exactly three or four channels
- * (rgb or rgba) it swaps the channel order (bgr or abgr).
- *
- * PIXARLOGDATAFMT_11BITLOG provides the internal encoding directly
- * packed in 16-bit values.   However no tools are supplied for interpreting
- * these values.
- *
- * "hot" (over 1.0) areas written in floating point get clamped to
- * 1.0 in the integer data types.
- *
- * When the file is closed after writing, the bit depth and sample format
- * are set always to appear as if 8-bit data has been written into it.
- * That way a naive program unaware of the particulars of the encoding
- * gets the format it is most likely able to handle.
- *
- * The codec does it's own horizontal differencing step on the coded
- * values so the libraries predictor stuff should be turned off.
- * The codec also handle byte swapping the encoded values as necessary
- * since the library does not have the information necessary
- * to know the bit depth of the raw unencoded buffer.
- *
- * NOTE: This decoder does not appear to update tif_rawcp, and tif_rawcc.
- * This can cause problems with the implementation of CHUNKY_STRIP_READ_SUPPORT
- * as noted in http://trac.osgeo.org/gdal/ticket/3894.   FrankW - Jan'11
- */
-
-#include "tif_predict.h"
-#include "../zlib_v128/zlib.h"
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <math.h>
-
-/* Tables for converting to/from 11 bit coded values */
-
-#define  TSIZE	 2048		/* decode table size (11-bit tokens) */
-#define  TSIZEP1 2049		/* Plus one for slop */
-#define  ONE	 1250		/* token value of 1.0 exactly */
-#define  RATIO	 1.004		/* nominal ratio for log part */
-
-#define CODE_MASK 0x7ff         /* 11 bits. */
-
-static float  Fltsize;
-static float  LogK1, LogK2;
-
-#define REPEAT(n, op)   { int i; i=n; do { i--; op; } while (i>0); }
-
-static void
-horizontalAccumulateF(uint16 *wp, int n, int stride, float *op,
-	float *ToLinearF)
-{
-    register unsigned int  cr, cg, cb, ca, mask;
-    register float  t0, t1, t2, t3;
-
-    if (n >= stride) {
-	mask = CODE_MASK;
-	if (stride == 3) {
-	    t0 = ToLinearF[cr = (wp[0] & mask)];
-	    t1 = ToLinearF[cg = (wp[1] & mask)];
-	    t2 = ToLinearF[cb = (wp[2] & mask)];
-	    op[0] = t0;
-	    op[1] = t1;
-	    op[2] = t2;
-	    n -= 3;
-	    while (n > 0) {
-		wp += 3;
-		op += 3;
-		n -= 3;
-		t0 = ToLinearF[(cr += wp[0]) & mask];
-		t1 = ToLinearF[(cg += wp[1]) & mask];
-		t2 = ToLinearF[(cb += wp[2]) & mask];
-		op[0] = t0;
-		op[1] = t1;
-		op[2] = t2;
-	    }
-	} else if (stride == 4) {
-	    t0 = ToLinearF[cr = (wp[0] & mask)];
-	    t1 = ToLinearF[cg = (wp[1] & mask)];
-	    t2 = ToLinearF[cb = (wp[2] & mask)];
-	    t3 = ToLinearF[ca = (wp[3] & mask)];
-	    op[0] = t0;
-	    op[1] = t1;
-	    op[2] = t2;
-	    op[3] = t3;
-	    n -= 4;
-	    while (n > 0) {
-		wp += 4;
-		op += 4;
-		n -= 4;
-		t0 = ToLinearF[(cr += wp[0]) & mask];
-		t1 = ToLinearF[(cg += wp[1]) & mask];
-		t2 = ToLinearF[(cb += wp[2]) & mask];
-		t3 = ToLinearF[(ca += wp[3]) & mask];
-		op[0] = t0;
-		op[1] = t1;
-		op[2] = t2;
-		op[3] = t3;
-	    }
-	} else {
-	    REPEAT(stride, *op = ToLinearF[*wp&mask]; wp++; op++)
-	    n -= stride;
-	    while (n > 0) {
-		REPEAT(stride,
-		    wp[stride] += *wp; *op = ToLinearF[*wp&mask]; wp++; op++)
-		n -= stride;
-	    }
-	}
-    }
-}
-
-static void
-horizontalAccumulate12(uint16 *wp, int n, int stride, int16 *op,
-	float *ToLinearF)
-{
-    register unsigned int  cr, cg, cb, ca, mask;
-    register float  t0, t1, t2, t3;
-
-#define SCALE12 2048.0F
-#define CLAMP12(t) (((t) < 3071) ? (uint16) (t) : 3071)
-
-    if (n >= stride) {
-	mask = CODE_MASK;
-	if (stride == 3) {
-	    t0 = ToLinearF[cr = (wp[0] & mask)] * SCALE12;
-	    t1 = ToLinearF[cg = (wp[1] & mask)] * SCALE12;
-	    t2 = ToLinearF[cb = (wp[2] & mask)] * SCALE12;
-	    op[0] = CLAMP12(t0);
-	    op[1] = CLAMP12(t1);
-	    op[2] = CLAMP12(t2);
-	    n -= 3;
-	    while (n > 0) {
-		wp += 3;
-		op += 3;
-		n -= 3;
-		t0 = ToLinearF[(cr += wp[0]) & mask] * SCALE12;
-		t1 = ToLinearF[(cg += wp[1]) & mask] * SCALE12;
-		t2 = ToLinearF[(cb += wp[2]) & mask] * SCALE12;
-		op[0] = CLAMP12(t0);
-		op[1] = CLAMP12(t1);
-		op[2] = CLAMP12(t2);
-	    }
-	} else if (stride == 4) {
-	    t0 = ToLinearF[cr = (wp[0] & mask)] * SCALE12;
-	    t1 = ToLinearF[cg = (wp[1] & mask)] * SCALE12;
-	    t2 = ToLinearF[cb = (wp[2] & mask)] * SCALE12;
-	    t3 = ToLinearF[ca = (wp[3] & mask)] * SCALE12;
-	    op[0] = CLAMP12(t0);
-	    op[1] = CLAMP12(t1);
-	    op[2] = CLAMP12(t2);
-	    op[3] = CLAMP12(t3);
-	    n -= 4;
-	    while (n > 0) {
-		wp += 4;
-		op += 4;
-		n -= 4;
-		t0 = ToLinearF[(cr += wp[0]) & mask] * SCALE12;
-		t1 = ToLinearF[(cg += wp[1]) & mask] * SCALE12;
-		t2 = ToLinearF[(cb += wp[2]) & mask] * SCALE12;
-		t3 = ToLinearF[(ca += wp[3]) & mask] * SCALE12;
-		op[0] = CLAMP12(t0);
-		op[1] = CLAMP12(t1);
-		op[2] = CLAMP12(t2);
-		op[3] = CLAMP12(t3);
-	    }
-	} else {
-	    REPEAT(stride, t0 = ToLinearF[*wp&mask] * SCALE12;
-                           *op = CLAMP12(t0); wp++; op++)
-	    n -= stride;
-	    while (n > 0) {
-		REPEAT(stride,
-		    wp[stride] += *wp; t0 = ToLinearF[wp[stride]&mask]*SCALE12;
-		    *op = CLAMP12(t0);  wp++; op++)
-		n -= stride;
-	    }
-	}
-    }
-}
-
-static void
-horizontalAccumulate16(uint16 *wp, int n, int stride, uint16 *op,
-	uint16 *ToLinear16)
-{
-    register unsigned int  cr, cg, cb, ca, mask;
-
-    if (n >= stride) {
-	mask = CODE_MASK;
-	if (stride == 3) {
-	    op[0] = ToLinear16[cr = (wp[0] & mask)];
-	    op[1] = ToLinear16[cg = (wp[1] & mask)];
-	    op[2] = ToLinear16[cb = (wp[2] & mask)];
-	    n -= 3;
-	    while (n > 0) {
-		wp += 3;
-		op += 3;
-		n -= 3;
-		op[0] = ToLinear16[(cr += wp[0]) & mask];
-		op[1] = ToLinear16[(cg += wp[1]) & mask];
-		op[2] = ToLinear16[(cb += wp[2]) & mask];
-	    }
-	} else if (stride == 4) {
-	    op[0] = ToLinear16[cr = (wp[0] & mask)];
-	    op[1] = ToLinear16[cg = (wp[1] & mask)];
-	    op[2] = ToLinear16[cb = (wp[2] & mask)];
-	    op[3] = ToLinear16[ca = (wp[3] & mask)];
-	    n -= 4;
-	    while (n > 0) {
-		wp += 4;
-		op += 4;
-		n -= 4;
-		op[0] = ToLinear16[(cr += wp[0]) & mask];
-		op[1] = ToLinear16[(cg += wp[1]) & mask];
-		op[2] = ToLinear16[(cb += wp[2]) & mask];
-		op[3] = ToLinear16[(ca += wp[3]) & mask];
-	    }
-	} else {
-	    REPEAT(stride, *op = ToLinear16[*wp&mask]; wp++; op++)
-	    n -= stride;
-	    while (n > 0) {
-		REPEAT(stride,
-		    wp[stride] += *wp; *op = ToLinear16[*wp&mask]; wp++; op++)
-		n -= stride;
-	    }
-	}
-    }
-}
-
-/* 
- * Returns the log encoded 11-bit values with the horizontal
- * differencing undone.
- */
-static void
-horizontalAccumulate11(uint16 *wp, int n, int stride, uint16 *op)
-{
-    register unsigned int  cr, cg, cb, ca, mask;
-
-    if (n >= stride) {
-	mask = CODE_MASK;
-	if (stride == 3) {
-	    op[0] = cr = wp[0];  op[1] = cg = wp[1];  op[2] = cb = wp[2];
-	    n -= 3;
-	    while (n > 0) {
-		wp += 3;
-		op += 3;
-		n -= 3;
-		op[0] = (cr += wp[0]) & mask;
-		op[1] = (cg += wp[1]) & mask;
-		op[2] = (cb += wp[2]) & mask;
-	    }
-	} else if (stride == 4) {
-	    op[0] = cr = wp[0];  op[1] = cg = wp[1];
-	    op[2] = cb = wp[2];  op[3] = ca = wp[3];
-	    n -= 4;
-	    while (n > 0) {
-		wp += 4;
-		op += 4;
-		n -= 4;
-		op[0] = (cr += wp[0]) & mask;
-		op[1] = (cg += wp[1]) & mask;
-		op[2] = (cb += wp[2]) & mask;
-		op[3] = (ca += wp[3]) & mask;
-	    } 
-	} else {
-	    REPEAT(stride, *op = *wp&mask; wp++; op++)
-	    n -= stride;
-	    while (n > 0) {
-		REPEAT(stride,
-		    wp[stride] += *wp; *op = *wp&mask; wp++; op++)
-		n -= stride;
-	    }
-	}
-    }
-}
-
-static void
-horizontalAccumulate8(uint16 *wp, int n, int stride, unsigned char *op,
-	unsigned char *ToLinear8)
-{
-    register unsigned int  cr, cg, cb, ca, mask;
-
-    if (n >= stride) {
-	mask = CODE_MASK;
-	if (stride == 3) {
-	    op[0] = ToLinear8[cr = (wp[0] & mask)];
-	    op[1] = ToLinear8[cg = (wp[1] & mask)];
-	    op[2] = ToLinear8[cb = (wp[2] & mask)];
-	    n -= 3;
-	    while (n > 0) {
-		n -= 3;
-		wp += 3;
-		op += 3;
-		op[0] = ToLinear8[(cr += wp[0]) & mask];
-		op[1] = ToLinear8[(cg += wp[1]) & mask];
-		op[2] = ToLinear8[(cb += wp[2]) & mask];
-	    }
-	} else if (stride == 4) {
-	    op[0] = ToLinear8[cr = (wp[0] & mask)];
-	    op[1] = ToLinear8[cg = (wp[1] & mask)];
-	    op[2] = ToLinear8[cb = (wp[2] & mask)];
-	    op[3] = ToLinear8[ca = (wp[3] & mask)];
-	    n -= 4;
-	    while (n > 0) {
-		n -= 4;
-		wp += 4;
-		op += 4;
-		op[0] = ToLinear8[(cr += wp[0]) & mask];
-		op[1] = ToLinear8[(cg += wp[1]) & mask];
-		op[2] = ToLinear8[(cb += wp[2]) & mask];
-		op[3] = ToLinear8[(ca += wp[3]) & mask];
-	    }
-	} else {
-	    REPEAT(stride, *op = ToLinear8[*wp&mask]; wp++; op++)
-	    n -= stride;
-	    while (n > 0) {
-		REPEAT(stride,
-		    wp[stride] += *wp; *op = ToLinear8[*wp&mask]; wp++; op++)
-		n -= stride;
-	    }
-	}
-    }
-}
-
-
-static void
-horizontalAccumulate8abgr(uint16 *wp, int n, int stride, unsigned char *op,
-	unsigned char *ToLinear8)
-{
-    register unsigned int  cr, cg, cb, ca, mask;
-    register unsigned char  t0, t1, t2, t3;
-
-    if (n >= stride) {
-	mask = CODE_MASK;
-	if (stride == 3) {
-	    op[0] = 0;
-	    t1 = ToLinear8[cb = (wp[2] & mask)];
-	    t2 = ToLinear8[cg = (wp[1] & mask)];
-	    t3 = ToLinear8[cr = (wp[0] & mask)];
-	    op[1] = t1;
-	    op[2] = t2;
-	    op[3] = t3;
-	    n -= 3;
-	    while (n > 0) {
-		n -= 3;
-		wp += 3;
-		op += 4;
-		op[0] = 0;
-		t1 = ToLinear8[(cb += wp[2]) & mask];
-		t2 = ToLinear8[(cg += wp[1]) & mask];
-		t3 = ToLinear8[(cr += wp[0]) & mask];
-		op[1] = t1;
-		op[2] = t2;
-		op[3] = t3;
-	    }
-	} else if (stride == 4) {
-	    t0 = ToLinear8[ca = (wp[3] & mask)];
-	    t1 = ToLinear8[cb = (wp[2] & mask)];
-	    t2 = ToLinear8[cg = (wp[1] & mask)];
-	    t3 = ToLinear8[cr = (wp[0] & mask)];
-	    op[0] = t0;
-	    op[1] = t1;
-	    op[2] = t2;
-	    op[3] = t3;
-	    n -= 4;
-	    while (n > 0) {
-		n -= 4;
-		wp += 4;
-		op += 4;
-		t0 = ToLinear8[(ca += wp[3]) & mask];
-		t1 = ToLinear8[(cb += wp[2]) & mask];
-		t2 = ToLinear8[(cg += wp[1]) & mask];
-		t3 = ToLinear8[(cr += wp[0]) & mask];
-		op[0] = t0;
-		op[1] = t1;
-		op[2] = t2;
-		op[3] = t3;
-	    }
-	} else {
-	    REPEAT(stride, *op = ToLinear8[*wp&mask]; wp++; op++)
-	    n -= stride;
-	    while (n > 0) {
-		REPEAT(stride,
-		    wp[stride] += *wp; *op = ToLinear8[*wp&mask]; wp++; op++)
-		n -= stride;
-	    }
-	}
-    }
-}
-
-/*
- * State block for each open TIFF
- * file using PixarLog compression/decompression.
- */
-typedef	struct {
-	TIFFPredictorState	predict;
-	z_stream		stream;
-	uint16			*tbuf; 
-	uint16			stride;
-	int			state;
-	int			user_datafmt;
-	int			quality;
-#define PLSTATE_INIT 1
-
-	TIFFVSetMethod		vgetparent;	/* super-class method */
-	TIFFVSetMethod		vsetparent;	/* super-class method */
-
-	float *ToLinearF;
-	uint16 *ToLinear16;
-	unsigned char *ToLinear8;
-	uint16  *FromLT2;
-	uint16  *From14; /* Really for 16-bit data, but we shift down 2 */
-	uint16  *From8;
-	
-} PixarLogState;
-
-static int
-PixarLogMakeTables(PixarLogState *sp)
-{
-
-/*
- *    We make several tables here to convert between various external
- *    representations (float, 16-bit, and 8-bit) and the internal
- *    11-bit companded representation.  The 11-bit representation has two
- *    distinct regions.  A linear bottom end up through .018316 in steps
- *    of about .000073, and a region of constant ratio up to about 25.
- *    These floating point numbers are stored in the main table ToLinearF. 
- *    All other tables are derived from this one.  The tables (and the
- *    ratios) are continuous at the internal seam.
- */
-
-    int  nlin, lt2size;
-    int  i, j;
-    double  b, c, linstep, v;
-    float *ToLinearF;
-    uint16 *ToLinear16;
-    unsigned char *ToLinear8;
-    uint16  *FromLT2;
-    uint16  *From14; /* Really for 16-bit data, but we shift down 2 */
-    uint16  *From8;
-
-    c = log(RATIO);	
-    nlin = (int)(1./c);	/* nlin must be an integer */
-    c = 1./nlin;
-    b = exp(-c*ONE);	/* multiplicative scale factor [b*exp(c*ONE) = 1] */
-    linstep = b*c*exp(1.);
-
-    LogK1 = (float)(1./c);	/* if (v >= 2)  token = k1*log(v*k2) */
-    LogK2 = (float)(1./b);
-    lt2size = (int)(2./linstep) + 1;
-    FromLT2 = (uint16 *)_TIFFmalloc(lt2size*sizeof(uint16));
-    From14 = (uint16 *)_TIFFmalloc(16384*sizeof(uint16));
-    From8 = (uint16 *)_TIFFmalloc(256*sizeof(uint16));
-    ToLinearF = (float *)_TIFFmalloc(TSIZEP1 * sizeof(float));
-    ToLinear16 = (uint16 *)_TIFFmalloc(TSIZEP1 * sizeof(uint16));
-    ToLinear8 = (unsigned char *)_TIFFmalloc(TSIZEP1 * sizeof(unsigned char));
-    if (FromLT2 == NULL || From14  == NULL || From8   == NULL ||
-	 ToLinearF == NULL || ToLinear16 == NULL || ToLinear8 == NULL) {
-	if (FromLT2) _TIFFfree(FromLT2);
-	if (From14) _TIFFfree(From14);
-	if (From8) _TIFFfree(From8);
-	if (ToLinearF) _TIFFfree(ToLinearF);
-	if (ToLinear16) _TIFFfree(ToLinear16);
-	if (ToLinear8) _TIFFfree(ToLinear8);
-	sp->FromLT2 = NULL;
-	sp->From14 = NULL;
-	sp->From8 = NULL;
-	sp->ToLinearF = NULL;
-	sp->ToLinear16 = NULL;
-	sp->ToLinear8 = NULL;
-	return 0;
-    }
-
-    j = 0;
-
-    for (i = 0; i < nlin; i++)  {
-	v = i * linstep;
-	ToLinearF[j++] = (float)v;
-    }
-
-    for (i = nlin; i < TSIZE; i++)
-	ToLinearF[j++] = (float)(b*exp(c*i));
-
-    ToLinearF[2048] = ToLinearF[2047];
-
-    for (i = 0; i < TSIZEP1; i++)  {
-	v = ToLinearF[i]*65535.0 + 0.5;
-	ToLinear16[i] = (v > 65535.0) ? 65535 : (uint16)v;
-	v = ToLinearF[i]*255.0  + 0.5;
-	ToLinear8[i]  = (v > 255.0) ? 255 : (unsigned char)v;
-    }
-
-    j = 0;
-    for (i = 0; i < lt2size; i++)  {
-	if ((i*linstep)*(i*linstep) > ToLinearF[j]*ToLinearF[j+1])
-	    j++;
-	FromLT2[i] = j;
-    }
-
-    /*
-     * Since we lose info anyway on 16-bit data, we set up a 14-bit
-     * table and shift 16-bit values down two bits on input.
-     * saves a little table space.
-     */
-    j = 0;
-    for (i = 0; i < 16384; i++)  {
-	while ((i/16383.)*(i/16383.) > ToLinearF[j]*ToLinearF[j+1])
-	    j++;
-	From14[i] = j;
-    }
-
-    j = 0;
-    for (i = 0; i < 256; i++)  {
-	while ((i/255.)*(i/255.) > ToLinearF[j]*ToLinearF[j+1])
-	    j++;
-	From8[i] = j;
-    }
-
-    Fltsize = (float)(lt2size/2);
-
-    sp->ToLinearF = ToLinearF;
-    sp->ToLinear16 = ToLinear16;
-    sp->ToLinear8 = ToLinear8;
-    sp->FromLT2 = FromLT2;
-    sp->From14 = From14;
-    sp->From8 = From8;
-
-    return 1;
-}
-
-#define DecoderState(tif)	((PixarLogState*) (tif)->tif_data)
-#define EncoderState(tif)	((PixarLogState*) (tif)->tif_data)
-
-static int PixarLogEncode(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s);
-static int PixarLogDecode(TIFF* tif, uint8* op, tmsize_t occ, uint16 s);
-
-#define PIXARLOGDATAFMT_UNKNOWN	-1
-
-static int
-PixarLogGuessDataFmt(TIFFDirectory *td)
-{
-	int guess = PIXARLOGDATAFMT_UNKNOWN;
-	int format = td->td_sampleformat;
-
-	/* If the user didn't tell us his datafmt,
-	 * take our best guess from the bitspersample.
-	 */
-	switch (td->td_bitspersample) {
-	 case 32:
-		if (format == SAMPLEFORMAT_IEEEFP)
-			guess = PIXARLOGDATAFMT_FLOAT;
-		break;
-	 case 16:
-		if (format == SAMPLEFORMAT_VOID || format == SAMPLEFORMAT_UINT)
-			guess = PIXARLOGDATAFMT_16BIT;
-		break;
-	 case 12:
-		if (format == SAMPLEFORMAT_VOID || format == SAMPLEFORMAT_INT)
-			guess = PIXARLOGDATAFMT_12BITPICIO;
-		break;
-	 case 11:
-		if (format == SAMPLEFORMAT_VOID || format == SAMPLEFORMAT_UINT)
-			guess = PIXARLOGDATAFMT_11BITLOG;
-		break;
-	 case 8:
-		if (format == SAMPLEFORMAT_VOID || format == SAMPLEFORMAT_UINT)
-			guess = PIXARLOGDATAFMT_8BIT;
-		break;
-	}
-
-	return guess;
-}
-
-static tmsize_t
-multiply_ms(tmsize_t m1, tmsize_t m2)
-{
-	tmsize_t bytes = m1 * m2;
-
-	if (m1 && bytes / m1 != m2)
-		bytes = 0;
-
-	return bytes;
-}
-
-static int
-PixarLogFixupTags(TIFF* tif)
-{
-	(void) tif;
-	return (1);
-}
-
-static int
-PixarLogSetupDecode(TIFF* tif)
-{
-	static const char module[] = "PixarLogSetupDecode";
-	TIFFDirectory *td = &tif->tif_dir;
-	PixarLogState* sp = DecoderState(tif);
-	tmsize_t tbuf_size;
-
-	assert(sp != NULL);
-
-	/* Make sure no byte swapping happens on the data
-	 * after decompression. */
-	tif->tif_postdecode = _TIFFNoPostDecode;  
-
-	/* for some reason, we can't do this in TIFFInitPixarLog */
-
-	sp->stride = (td->td_planarconfig == PLANARCONFIG_CONTIG ?
-	    td->td_samplesperpixel : 1);
-	tbuf_size = multiply_ms(multiply_ms(multiply_ms(sp->stride, td->td_imagewidth),
-				      td->td_rowsperstrip), sizeof(uint16));
-	if (tbuf_size == 0)
-		return (0);   /* TODO: this is an error return without error report through TIFFErrorExt */
-	sp->tbuf = (uint16 *) _TIFFmalloc(tbuf_size+sizeof(uint16)*sp->stride);
-	if (sp->tbuf == NULL)
-		return (0);
-	if (sp->user_datafmt == PIXARLOGDATAFMT_UNKNOWN)
-		sp->user_datafmt = PixarLogGuessDataFmt(td);
-	if (sp->user_datafmt == PIXARLOGDATAFMT_UNKNOWN) {
-		TIFFErrorExt(tif->tif_clientdata, module,
-			"PixarLog compression can't handle bits depth/data format combination (depth: %d)", 
-			td->td_bitspersample);
-		return (0);
-	}
-
-	if (inflateInit(&sp->stream) != Z_OK) {
-		TIFFErrorExt(tif->tif_clientdata, module, "%s", sp->stream.msg);
-		return (0);
-	} else {
-		sp->state |= PLSTATE_INIT;
-		return (1);
-	}
-}
-
-/*
- * Setup state for decoding a strip.
- */
-static int
-PixarLogPreDecode(TIFF* tif, uint16 s)
-{
-	static const char module[] = "PixarLogPreDecode";
-	PixarLogState* sp = DecoderState(tif);
-
-	(void) s;
-	assert(sp != NULL);
-	sp->stream.next_in = tif->tif_rawdata;
-	assert(sizeof(sp->stream.avail_in)==4);  /* if this assert gets raised,
-	    we need to simplify this code to reflect a ZLib that is likely updated
-	    to deal with 8byte memory sizes, though this code will respond
-	    apropriately even before we simplify it */
-	sp->stream.avail_in = (uInt) tif->tif_rawcc;
-	if ((tmsize_t)sp->stream.avail_in != tif->tif_rawcc)
-	{
-		TIFFErrorExt(tif->tif_clientdata, module, "ZLib cannot deal with buffers this size");
-		return (0);
-	}
-	return (inflateReset(&sp->stream) == Z_OK);
-}
-
-static int
-PixarLogDecode(TIFF* tif, uint8* op, tmsize_t occ, uint16 s)
-{
-	static const char module[] = "PixarLogDecode";
-	TIFFDirectory *td = &tif->tif_dir;
-	PixarLogState* sp = DecoderState(tif);
-	tmsize_t i;
-	tmsize_t nsamples;
-	int llen;
-	uint16 *up;
-
-	switch (sp->user_datafmt) {
-	case PIXARLOGDATAFMT_FLOAT:
-		nsamples = occ / sizeof(float);	/* XXX float == 32 bits */
-		break;
-	case PIXARLOGDATAFMT_16BIT:
-	case PIXARLOGDATAFMT_12BITPICIO:
-	case PIXARLOGDATAFMT_11BITLOG:
-		nsamples = occ / sizeof(uint16); /* XXX uint16 == 16 bits */
-		break;
-	case PIXARLOGDATAFMT_8BIT:
-	case PIXARLOGDATAFMT_8BITABGR:
-		nsamples = occ;
-		break;
-	default:
-		TIFFErrorExt(tif->tif_clientdata, module,
-			"%d bit input not supported in PixarLog",
-			td->td_bitspersample);
-		return 0;
-	}
-
-	llen = sp->stride * td->td_imagewidth;
-
-	(void) s;
-	assert(sp != NULL);
-	sp->stream.next_out = (unsigned char *) sp->tbuf;
-	assert(sizeof(sp->stream.avail_out)==4);  /* if this assert gets raised,
-	    we need to simplify this code to reflect a ZLib that is likely updated
-	    to deal with 8byte memory sizes, though this code will respond
-	    apropriately even before we simplify it */
-	sp->stream.avail_out = (uInt) (nsamples * sizeof(uint16));
-	if (sp->stream.avail_out != nsamples * sizeof(uint16))
-	{
-		TIFFErrorExt(tif->tif_clientdata, module, "ZLib cannot deal with buffers this size");
-		return (0);
-	}
-	do {
-		int state = inflate(&sp->stream, Z_PARTIAL_FLUSH);
-		if (state == Z_STREAM_END) {
-			break;			/* XXX */
-		}
-		if (state == Z_DATA_ERROR) {
-			TIFFErrorExt(tif->tif_clientdata, module,
-			    "Decoding error at scanline %lu, %s",
-			    (unsigned long) tif->tif_row, sp->stream.msg);
-			if (inflateSync(&sp->stream) != Z_OK)
-				return (0);
-			continue;
-		}
-		if (state != Z_OK) {
-			TIFFErrorExt(tif->tif_clientdata, module, "ZLib error: %s",
-			    sp->stream.msg);
-			return (0);
-		}
-	} while (sp->stream.avail_out > 0);
-
-	/* hopefully, we got all the bytes we needed */
-	if (sp->stream.avail_out != 0) {
-		TIFFErrorExt(tif->tif_clientdata, module,
-		    "Not enough data at scanline %lu (short " TIFF_UINT64_FORMAT " bytes)",
-		    (unsigned long) tif->tif_row, (TIFF_UINT64_T) sp->stream.avail_out);
-		return (0);
-	}
-
-	up = sp->tbuf;
-	/* Swap bytes in the data if from a different endian machine. */
-	if (tif->tif_flags & TIFF_SWAB)
-		TIFFSwabArrayOfShort(up, nsamples);
-
-	/*
-	 * if llen is not an exact multiple of nsamples, the decode operation
-	 * may overflow the output buffer, so truncate it enough to prevent
-	 * that but still salvage as much data as possible.
-	 */
-	if (nsamples % llen) { 
-		TIFFWarningExt(tif->tif_clientdata, module,
-			"stride %lu is not a multiple of sample count, "
-			"%lu, data truncated.", (unsigned long) llen, (unsigned long) nsamples);
-		nsamples -= nsamples % llen;
-	}
-
-	for (i = 0; i < nsamples; i += llen, up += llen) {
-		switch (sp->user_datafmt)  {
-		case PIXARLOGDATAFMT_FLOAT:
-			horizontalAccumulateF(up, llen, sp->stride,
-					(float *)op, sp->ToLinearF);
-			op += llen * sizeof(float);
-			break;
-		case PIXARLOGDATAFMT_16BIT:
-			horizontalAccumulate16(up, llen, sp->stride,
-					(uint16 *)op, sp->ToLinear16);
-			op += llen * sizeof(uint16);
-			break;
-		case PIXARLOGDATAFMT_12BITPICIO:
-			horizontalAccumulate12(up, llen, sp->stride,
-					(int16 *)op, sp->ToLinearF);
-			op += llen * sizeof(int16);
-			break;
-		case PIXARLOGDATAFMT_11BITLOG:
-			horizontalAccumulate11(up, llen, sp->stride,
-					(uint16 *)op);
-			op += llen * sizeof(uint16);
-			break;
-		case PIXARLOGDATAFMT_8BIT:
-			horizontalAccumulate8(up, llen, sp->stride,
-					(unsigned char *)op, sp->ToLinear8);
-			op += llen * sizeof(unsigned char);
-			break;
-		case PIXARLOGDATAFMT_8BITABGR:
-			horizontalAccumulate8abgr(up, llen, sp->stride,
-					(unsigned char *)op, sp->ToLinear8);
-			op += llen * sizeof(unsigned char);
-			break;
-		default:
-			TIFFErrorExt(tif->tif_clientdata, module,
-				  "Unsupported bits/sample: %d",
-				  td->td_bitspersample);
-			return (0);
-		}
-	}
-
-	return (1);
-}
-
-static int
-PixarLogSetupEncode(TIFF* tif)
-{
-	static const char module[] = "PixarLogSetupEncode";
-	TIFFDirectory *td = &tif->tif_dir;
-	PixarLogState* sp = EncoderState(tif);
-	tmsize_t tbuf_size;
-
-	assert(sp != NULL);
-
-	/* for some reason, we can't do this in TIFFInitPixarLog */
-
-	sp->stride = (td->td_planarconfig == PLANARCONFIG_CONTIG ?
-	    td->td_samplesperpixel : 1);
-	tbuf_size = multiply_ms(multiply_ms(multiply_ms(sp->stride, td->td_imagewidth),
-				      td->td_rowsperstrip), sizeof(uint16));
-	if (tbuf_size == 0)
-		return (0);  /* TODO: this is an error return without error report through TIFFErrorExt */
-	sp->tbuf = (uint16 *) _TIFFmalloc(tbuf_size);
-	if (sp->tbuf == NULL)
-		return (0);
-	if (sp->user_datafmt == PIXARLOGDATAFMT_UNKNOWN)
-		sp->user_datafmt = PixarLogGuessDataFmt(td);
-	if (sp->user_datafmt == PIXARLOGDATAFMT_UNKNOWN) {
-		TIFFErrorExt(tif->tif_clientdata, module, "PixarLog compression can't handle %d bit linear encodings", td->td_bitspersample);
-		return (0);
-	}
-
-	if (deflateInit(&sp->stream, sp->quality) != Z_OK) {
-		TIFFErrorExt(tif->tif_clientdata, module, "%s", sp->stream.msg);
-		return (0);
-	} else {
-		sp->state |= PLSTATE_INIT;
-		return (1);
-	}
-}
-
-/*
- * Reset encoding state at the start of a strip.
- */
-static int
-PixarLogPreEncode(TIFF* tif, uint16 s)
-{
-	static const char module[] = "PixarLogPreEncode";
-	PixarLogState *sp = EncoderState(tif);
-
-	(void) s;
-	assert(sp != NULL);
-	sp->stream.next_out = tif->tif_rawdata;
-	assert(sizeof(sp->stream.avail_out)==4);  /* if this assert gets raised,
-	    we need to simplify this code to reflect a ZLib that is likely updated
-	    to deal with 8byte memory sizes, though this code will respond
-	    apropriately even before we simplify it */
-	sp->stream.avail_out = (uInt)tif->tif_rawdatasize;
-	if ((tmsize_t)sp->stream.avail_out != tif->tif_rawdatasize)
-	{
-		TIFFErrorExt(tif->tif_clientdata, module, "ZLib cannot deal with buffers this size");
-		return (0);
-	}
-	return (deflateReset(&sp->stream) == Z_OK);
-}
-
-static void
-horizontalDifferenceF(float *ip, int n, int stride, uint16 *wp, uint16 *FromLT2)
-{
-    int32 r1, g1, b1, a1, r2, g2, b2, a2, mask;
-    float fltsize = Fltsize;
-
-#define  CLAMP(v) ( (v<(float)0.)   ? 0				\
-		  : (v<(float)2.)   ? FromLT2[(int)(v*fltsize)]	\
-		  : (v>(float)24.2) ? 2047			\
-		  : LogK1*log(v*LogK2) + 0.5 )
-
-    mask = CODE_MASK;
-    if (n >= stride) {
-	if (stride == 3) {
-	    r2 = wp[0] = (uint16) CLAMP(ip[0]);
-	    g2 = wp[1] = (uint16) CLAMP(ip[1]);
-	    b2 = wp[2] = (uint16) CLAMP(ip[2]);
-	    n -= 3;
-	    while (n > 0) {
-		n -= 3;
-		wp += 3;
-		ip += 3;
-		r1 = (int32) CLAMP(ip[0]); wp[0] = (r1-r2) & mask; r2 = r1;
-		g1 = (int32) CLAMP(ip[1]); wp[1] = (g1-g2) & mask; g2 = g1;
-		b1 = (int32) CLAMP(ip[2]); wp[2] = (b1-b2) & mask; b2 = b1;
-	    }
-	} else if (stride == 4) {
-	    r2 = wp[0] = (uint16) CLAMP(ip[0]);
-	    g2 = wp[1] = (uint16) CLAMP(ip[1]);
-	    b2 = wp[2] = (uint16) CLAMP(ip[2]);
-	    a2 = wp[3] = (uint16) CLAMP(ip[3]);
-	    n -= 4;
-	    while (n > 0) {
-		n -= 4;
-		wp += 4;
-		ip += 4;
-		r1 = (int32) CLAMP(ip[0]); wp[0] = (r1-r2) & mask; r2 = r1;
-		g1 = (int32) CLAMP(ip[1]); wp[1] = (g1-g2) & mask; g2 = g1;
-		b1 = (int32) CLAMP(ip[2]); wp[2] = (b1-b2) & mask; b2 = b1;
-		a1 = (int32) CLAMP(ip[3]); wp[3] = (a1-a2) & mask; a2 = a1;
-	    }
-	} else {
-	    ip += n - 1;	/* point to last one */
-	    wp += n - 1;	/* point to last one */
-	    n -= stride;
-	    while (n > 0) {
-		REPEAT(stride, wp[0] = (uint16) CLAMP(ip[0]);
-				wp[stride] -= wp[0];
-				wp[stride] &= mask;
-				wp--; ip--)
-		n -= stride;
-	    }
-	    REPEAT(stride, wp[0] = (uint16) CLAMP(ip[0]); wp--; ip--)
-	}
-    }
-}
-
-static void
-horizontalDifference16(unsigned short *ip, int n, int stride, 
-	unsigned short *wp, uint16 *From14)
-{
-    register int  r1, g1, b1, a1, r2, g2, b2, a2, mask;
-
-/* assumption is unsigned pixel values */
-#undef   CLAMP
-#define  CLAMP(v) From14[(v) >> 2]
-
-    mask = CODE_MASK;
-    if (n >= stride) {
-	if (stride == 3) {
-	    r2 = wp[0] = CLAMP(ip[0]);  g2 = wp[1] = CLAMP(ip[1]);
-	    b2 = wp[2] = CLAMP(ip[2]);
-	    n -= 3;
-	    while (n > 0) {
-		n -= 3;
-		wp += 3;
-		ip += 3;
-		r1 = CLAMP(ip[0]); wp[0] = (r1-r2) & mask; r2 = r1;
-		g1 = CLAMP(ip[1]); wp[1] = (g1-g2) & mask; g2 = g1;
-		b1 = CLAMP(ip[2]); wp[2] = (b1-b2) & mask; b2 = b1;
-	    }
-	} else if (stride == 4) {
-	    r2 = wp[0] = CLAMP(ip[0]);  g2 = wp[1] = CLAMP(ip[1]);
-	    b2 = wp[2] = CLAMP(ip[2]);  a2 = wp[3] = CLAMP(ip[3]);
-	    n -= 4;
-	    while (n > 0) {
-		n -= 4;
-		wp += 4;
-		ip += 4;
-		r1 = CLAMP(ip[0]); wp[0] = (r1-r2) & mask; r2 = r1;
-		g1 = CLAMP(ip[1]); wp[1] = (g1-g2) & mask; g2 = g1;
-		b1 = CLAMP(ip[2]); wp[2] = (b1-b2) & mask; b2 = b1;
-		a1 = CLAMP(ip[3]); wp[3] = (a1-a2) & mask; a2 = a1;
-	    }
-	} else {
-	    ip += n - 1;	/* point to last one */
-	    wp += n - 1;	/* point to last one */
-	    n -= stride;
-	    while (n > 0) {
-		REPEAT(stride, wp[0] = CLAMP(ip[0]);
-				wp[stride] -= wp[0];
-				wp[stride] &= mask;
-				wp--; ip--)
-		n -= stride;
-	    }
-	    REPEAT(stride, wp[0] = CLAMP(ip[0]); wp--; ip--)
-	}
-    }
-}
-
-
-static void
-horizontalDifference8(unsigned char *ip, int n, int stride, 
-	unsigned short *wp, uint16 *From8)
-{
-    register int  r1, g1, b1, a1, r2, g2, b2, a2, mask;
-
-#undef	 CLAMP
-#define  CLAMP(v) (From8[(v)])
-
-    mask = CODE_MASK;
-    if (n >= stride) {
-	if (stride == 3) {
-	    r2 = wp[0] = CLAMP(ip[0]);  g2 = wp[1] = CLAMP(ip[1]);
-	    b2 = wp[2] = CLAMP(ip[2]);
-	    n -= 3;
-	    while (n > 0) {
-		n -= 3;
-		r1 = CLAMP(ip[3]); wp[3] = (r1-r2) & mask; r2 = r1;
-		g1 = CLAMP(ip[4]); wp[4] = (g1-g2) & mask; g2 = g1;
-		b1 = CLAMP(ip[5]); wp[5] = (b1-b2) & mask; b2 = b1;
-		wp += 3;
-		ip += 3;
-	    }
-	} else if (stride == 4) {
-	    r2 = wp[0] = CLAMP(ip[0]);  g2 = wp[1] = CLAMP(ip[1]);
-	    b2 = wp[2] = CLAMP(ip[2]);  a2 = wp[3] = CLAMP(ip[3]);
-	    n -= 4;
-	    while (n > 0) {
-		n -= 4;
-		r1 = CLAMP(ip[4]); wp[4] = (r1-r2) & mask; r2 = r1;
-		g1 = CLAMP(ip[5]); wp[5] = (g1-g2) & mask; g2 = g1;
-		b1 = CLAMP(ip[6]); wp[6] = (b1-b2) & mask; b2 = b1;
-		a1 = CLAMP(ip[7]); wp[7] = (a1-a2) & mask; a2 = a1;
-		wp += 4;
-		ip += 4;
-	    }
-	} else {
-	    wp += n + stride - 1;	/* point to last one */
-	    ip += n + stride - 1;	/* point to last one */
-	    n -= stride;
-	    while (n > 0) {
-		REPEAT(stride, wp[0] = CLAMP(ip[0]);
-				wp[stride] -= wp[0];
-				wp[stride] &= mask;
-				wp--; ip--)
-		n -= stride;
-	    }
-	    REPEAT(stride, wp[0] = CLAMP(ip[0]); wp--; ip--)
-	}
-    }
-}
-
-/*
- * Encode a chunk of pixels.
- */
-static int
-PixarLogEncode(TIFF* tif, uint8* bp, tmsize_t cc, uint16 s)
-{
-	static const char module[] = "PixarLogEncode";
-	TIFFDirectory *td = &tif->tif_dir;
-	PixarLogState *sp = EncoderState(tif);
-	tmsize_t i;
-	tmsize_t n;
-	int llen;
-	unsigned short * up;
-
-	(void) s;
-
-	switch (sp->user_datafmt) {
-	case PIXARLOGDATAFMT_FLOAT:
-		n = cc / sizeof(float);		/* XXX float == 32 bits */
-		break;
-	case PIXARLOGDATAFMT_16BIT:
-	case PIXARLOGDATAFMT_12BITPICIO:
-	case PIXARLOGDATAFMT_11BITLOG:
-		n = cc / sizeof(uint16);	/* XXX uint16 == 16 bits */
-		break;
-	case PIXARLOGDATAFMT_8BIT:
-	case PIXARLOGDATAFMT_8BITABGR:
-		n = cc;
-		break;
-	default:
-		TIFFErrorExt(tif->tif_clientdata, module,
-			"%d bit input not supported in PixarLog",
-			td->td_bitspersample);
-		return 0;
-	}
-
-	llen = sp->stride * td->td_imagewidth;
-
-	for (i = 0, up = sp->tbuf; i < n; i += llen, up += llen) {
-		switch (sp->user_datafmt)  {
-		case PIXARLOGDATAFMT_FLOAT:
-			horizontalDifferenceF((float *)bp, llen, 
-				sp->stride, up, sp->FromLT2);
-			bp += llen * sizeof(float);
-			break;
-		case PIXARLOGDATAFMT_16BIT:
-			horizontalDifference16((uint16 *)bp, llen, 
-				sp->stride, up, sp->From14);
-			bp += llen * sizeof(uint16);
-			break;
-		case PIXARLOGDATAFMT_8BIT:
-			horizontalDifference8((unsigned char *)bp, llen, 
-				sp->stride, up, sp->From8);
-			bp += llen * sizeof(unsigned char);
-			break;
-		default:
-			TIFFErrorExt(tif->tif_clientdata, module,
-				"%d bit input not supported in PixarLog",
-				td->td_bitspersample);
-			return 0;
-		}
-	}
- 
-	sp->stream.next_in = (unsigned char *) sp->tbuf;
-	assert(sizeof(sp->stream.avail_in)==4);  /* if this assert gets raised,
-	    we need to simplify this code to reflect a ZLib that is likely updated
-	    to deal with 8byte memory sizes, though this code will respond
-	    apropriately even before we simplify it */
-	sp->stream.avail_in = (uInt) (n * sizeof(uint16));
-	if ((sp->stream.avail_in / sizeof(uint16)) != (uInt) n)
-	{
-		TIFFErrorExt(tif->tif_clientdata, module,
-			     "ZLib cannot deal with buffers this size");
-		return (0);
-	}
-
-	do {
-		if (deflate(&sp->stream, Z_NO_FLUSH) != Z_OK) {
-			TIFFErrorExt(tif->tif_clientdata, module, "Encoder error: %s",
-			    sp->stream.msg);
-			return (0);
-		}
-		if (sp->stream.avail_out == 0) {
-			tif->tif_rawcc = tif->tif_rawdatasize;
-			TIFFFlushData1(tif);
-			sp->stream.next_out = tif->tif_rawdata;
-			sp->stream.avail_out = (uInt) tif->tif_rawdatasize;  /* this is a safe typecast, as check is made already in PixarLogPreEncode */
-		}
-	} while (sp->stream.avail_in > 0);
-	return (1);
-}
-
-/*
- * Finish off an encoded strip by flushing the last
- * string and tacking on an End Of Information code.
- */
-
-static int
-PixarLogPostEncode(TIFF* tif)
-{
-	static const char module[] = "PixarLogPostEncode";
-	PixarLogState *sp = EncoderState(tif);
-	int state;
-
-	sp->stream.avail_in = 0;
-
-	do {
-		state = deflate(&sp->stream, Z_FINISH);
-		switch (state) {
-		case Z_STREAM_END:
-		case Z_OK:
-		    if ((tmsize_t)sp->stream.avail_out != tif->tif_rawdatasize) {
-			    tif->tif_rawcc =
-				tif->tif_rawdatasize - sp->stream.avail_out;
-			    TIFFFlushData1(tif);
-			    sp->stream.next_out = tif->tif_rawdata;
-			    sp->stream.avail_out = (uInt) tif->tif_rawdatasize;  /* this is a safe typecast, as check is made already in PixarLogPreEncode */
-		    }
-		    break;
-		default:
-			TIFFErrorExt(tif->tif_clientdata, module, "ZLib error: %s",
-			sp->stream.msg);
-		    return (0);
-		}
-	} while (state != Z_STREAM_END);
-	return (1);
-}
-
-static void
-PixarLogClose(TIFF* tif)
-{
-	TIFFDirectory *td = &tif->tif_dir;
-
-	/* In a really sneaky (and really incorrect, and untruthfull, and
-	 * troublesome, and error-prone) maneuver that completely goes against
-	 * the spirit of TIFF, and breaks TIFF, on close, we covertly
-	 * modify both bitspersample and sampleformat in the directory to
-	 * indicate 8-bit linear.  This way, the decode "just works" even for
-	 * readers that don't know about PixarLog, or how to set
-	 * the PIXARLOGDATFMT pseudo-tag.
-	 */
-	td->td_bitspersample = 8;
-	td->td_sampleformat = SAMPLEFORMAT_UINT;
-}
-
-static void
-PixarLogCleanup(TIFF* tif)
-{
-	PixarLogState* sp = (PixarLogState*) tif->tif_data;
-
-	assert(sp != 0);
-
-	(void)TIFFPredictorCleanup(tif);
-
-	tif->tif_tagmethods.vgetfield = sp->vgetparent;
-	tif->tif_tagmethods.vsetfield = sp->vsetparent;
-
-	if (sp->FromLT2) _TIFFfree(sp->FromLT2);
-	if (sp->From14) _TIFFfree(sp->From14);
-	if (sp->From8) _TIFFfree(sp->From8);
-	if (sp->ToLinearF) _TIFFfree(sp->ToLinearF);
-	if (sp->ToLinear16) _TIFFfree(sp->ToLinear16);
-	if (sp->ToLinear8) _TIFFfree(sp->ToLinear8);
-	if (sp->state&PLSTATE_INIT) {
-		if (tif->tif_mode == O_RDONLY)
-			inflateEnd(&sp->stream);
-		else
-			deflateEnd(&sp->stream);
-	}
-	if (sp->tbuf)
-		_TIFFfree(sp->tbuf);
-	_TIFFfree(sp);
-	tif->tif_data = NULL;
-
-	_TIFFSetDefaultCompressionState(tif);
-}
-
-static int
-PixarLogVSetField(TIFF* tif, uint32 tag, va_list ap)
-{
-    static const char module[] = "PixarLogVSetField";
-    PixarLogState *sp = (PixarLogState *)tif->tif_data;
-    int result;
-
-    switch (tag) {
-     case TIFFTAG_PIXARLOGQUALITY:
-		sp->quality = (int) va_arg(ap, int);
-		if (tif->tif_mode != O_RDONLY && (sp->state&PLSTATE_INIT)) {
-			if (deflateParams(&sp->stream,
-			    sp->quality, Z_DEFAULT_STRATEGY) != Z_OK) {
-				TIFFErrorExt(tif->tif_clientdata, module, "ZLib error: %s",
-					sp->stream.msg);
-				return (0);
-			}
-		}
-		return (1);
-     case TIFFTAG_PIXARLOGDATAFMT:
-	sp->user_datafmt = (int) va_arg(ap, int);
-	/* Tweak the TIFF header so that the rest of libtiff knows what
-	 * size of data will be passed between app and library, and
-	 * assume that the app knows what it is doing and is not
-	 * confused by these header manipulations...
-	 */
-	switch (sp->user_datafmt) {
-	 case PIXARLOGDATAFMT_8BIT:
-	 case PIXARLOGDATAFMT_8BITABGR:
-	    TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 8);
-	    TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT);
-	    break;
-	 case PIXARLOGDATAFMT_11BITLOG:
-	    TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 16);
-	    TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT);
-	    break;
-	 case PIXARLOGDATAFMT_12BITPICIO:
-	    TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 16);
-	    TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_INT);
-	    break;
-	 case PIXARLOGDATAFMT_16BIT:
-	    TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 16);
-	    TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_UINT);
-	    break;
-	 case PIXARLOGDATAFMT_FLOAT:
-	    TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 32);
-	    TIFFSetField(tif, TIFFTAG_SAMPLEFORMAT, SAMPLEFORMAT_IEEEFP);
-	    break;
-	}
-	/*
-	 * Must recalculate sizes should bits/sample change.
-	 */
-	tif->tif_tilesize = isTiled(tif) ? TIFFTileSize(tif) : (tmsize_t)(-1);
-	tif->tif_scanlinesize = TIFFScanlineSize(tif);
-	result = 1;		/* NB: pseudo tag */
-	break;
-     default:
-	result = (*sp->vsetparent)(tif, tag, ap);
-    }
-    return (result);
-}
-
-static int
-PixarLogVGetField(TIFF* tif, uint32 tag, va_list ap)
-{
-    PixarLogState *sp = (PixarLogState *)tif->tif_data;
-
-    switch (tag) {
-     case TIFFTAG_PIXARLOGQUALITY:
-	*va_arg(ap, int*) = sp->quality;
-	break;
-     case TIFFTAG_PIXARLOGDATAFMT:
-	*va_arg(ap, int*) = sp->user_datafmt;
-	break;
-     default:
-	return (*sp->vgetparent)(tif, tag, ap);
-    }
-    return (1);
-}
-
-static const TIFFField pixarlogFields[] = {
-    {TIFFTAG_PIXARLOGDATAFMT, 0, 0, TIFF_ANY, 0, TIFF_SETGET_INT, TIFF_SETGET_UNDEFINED, FIELD_PSEUDO, FALSE, FALSE, "", NULL},
-    {TIFFTAG_PIXARLOGQUALITY, 0, 0, TIFF_ANY, 0, TIFF_SETGET_INT, TIFF_SETGET_UNDEFINED, FIELD_PSEUDO, FALSE, FALSE, "", NULL}
-};
-
-int
-TIFFInitPixarLog(TIFF* tif, int scheme)
-{
-	static const char module[] = "TIFFInitPixarLog";
-
-	PixarLogState* sp;
-
-	assert(scheme == COMPRESSION_PIXARLOG);
-
-	/*
-	 * Merge codec-specific tag information.
-	 */
-	if (!_TIFFMergeFields(tif, pixarlogFields,
-			      TIFFArrayCount(pixarlogFields))) {
-		TIFFErrorExt(tif->tif_clientdata, module,
-			     "Merging PixarLog codec-specific tags failed");
-		return 0;
-	}
-
-	/*
-	 * Allocate state block so tag methods have storage to record values.
-	 */
-	tif->tif_data = (uint8*) _TIFFmalloc(sizeof (PixarLogState));
-	if (tif->tif_data == NULL)
-		goto bad;
-	sp = (PixarLogState*) tif->tif_data;
-	_TIFFmemset(sp, 0, sizeof (*sp));
-	sp->stream.data_type = Z_BINARY;
-	sp->user_datafmt = PIXARLOGDATAFMT_UNKNOWN;
-
-	/*
-	 * Install codec methods.
-	 */
-	tif->tif_fixuptags = PixarLogFixupTags; 
-	tif->tif_setupdecode = PixarLogSetupDecode;
-	tif->tif_predecode = PixarLogPreDecode;
-	tif->tif_decoderow = PixarLogDecode;
-	tif->tif_decodestrip = PixarLogDecode;  
-	tif->tif_decodetile = PixarLogDecode;
-	tif->tif_setupencode = PixarLogSetupEncode;
-	tif->tif_preencode = PixarLogPreEncode;
-	tif->tif_postencode = PixarLogPostEncode;
-	tif->tif_encoderow = PixarLogEncode;  
-	tif->tif_encodestrip = PixarLogEncode;
-	tif->tif_encodetile = PixarLogEncode;  
-	tif->tif_close = PixarLogClose;
-	tif->tif_cleanup = PixarLogCleanup;
-
-	/* Override SetField so we can handle our private pseudo-tag */
-	sp->vgetparent = tif->tif_tagmethods.vgetfield;
-	tif->tif_tagmethods.vgetfield = PixarLogVGetField;   /* hook for codec tags */
-	sp->vsetparent = tif->tif_tagmethods.vsetfield;
-	tif->tif_tagmethods.vsetfield = PixarLogVSetField;   /* hook for codec tags */
-
-	/* Default values for codec-specific fields */
-	sp->quality = Z_DEFAULT_COMPRESSION; /* default comp. level */
-	sp->state = 0;
-
-	/* we don't wish to use the predictor, 
-	 * the default is none, which predictor value 1
-	 */
-	(void) TIFFPredictorInit(tif);
-
-	/*
-	 * build the companding tables 
-	 */
-	PixarLogMakeTables(sp);
-
-	return (1);
-bad:
-	TIFFErrorExt(tif->tif_clientdata, module,
-		     "No space for PixarLog state block");
-	return (0);
-}
-#endif /* PIXARLOG_SUPPORT */
-
-/* vim: set ts=8 sts=8 sw=8 noet: */
-/*
- * Local Variables:
- * mode: c
- * c-basic-offset: 8
- * fill-column: 78
- * End:
- */
-