+++ /dev/null
-/* $Id: tif_pixarlog.c,v 1.1 2005/06/17 13:54:52 vp153 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.
- *
- */
-
-#include "tif_predict.h"
-#include "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]];
- t1 = ToLinearF[cg = wp[1]];
- t2 = ToLinearF[cb = wp[2]];
- 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]];
- t1 = ToLinearF[cg = wp[1]];
- t2 = ToLinearF[cb = wp[2]];
- t3 = ToLinearF[ca = wp[3]];
- 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]] * SCALE12;
- t1 = ToLinearF[cg = wp[1]] * SCALE12;
- t2 = ToLinearF[cb = wp[2]] * 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]] * SCALE12;
- t1 = ToLinearF[cg = wp[1]] * SCALE12;
- t2 = ToLinearF[cb = wp[2]] * SCALE12;
- t3 = ToLinearF[ca = wp[3]] * 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]];
- op[1] = ToLinear16[cg = wp[1]];
- op[2] = ToLinear16[cb = wp[2]];
- 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]];
- op[1] = ToLinear16[cg = wp[1]];
- op[2] = ToLinear16[cb = wp[2]];
- op[3] = ToLinear16[ca = wp[3]];
- 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]];
- op[1] = ToLinear8[cg = wp[1]];
- op[2] = ToLinear8[cb = wp[2]];
- 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]];
- op[1] = ToLinear8[cg = wp[1]];
- op[2] = ToLinear8[cb = wp[2]];
- op[3] = ToLinear8[ca = wp[3]];
- 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]];
- t2 = ToLinear8[cg = wp[1]];
- t3 = ToLinear8[cr = wp[0]];
- 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]];
- t1 = ToLinear8[cb = wp[2]];
- t2 = ToLinear8[cg = wp[1]];
- t3 = ToLinear8[cr = wp[0]];
- 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*, tidata_t, tsize_t, tsample_t);
-static int PixarLogDecode(TIFF*, tidata_t, tsize_t, tsample_t);
-
-#define N(a) (sizeof(a)/sizeof(a[0]))
-#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 uint32
-multiply(size_t m1, size_t m2)
-{
- uint32 bytes = m1 * m2;
-
- if (m1 && bytes / m1 != m2)
- bytes = 0;
-
- return bytes;
-}
-
-static int
-PixarLogSetupDecode(TIFF* tif)
-{
- TIFFDirectory *td = &tif->tif_dir;
- PixarLogState* sp = DecoderState(tif);
- tsize_t tbuf_size;
- static const char module[] = "PixarLogSetupDecode";
-
- 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(multiply(multiply(sp->stride, td->td_imagewidth),
- td->td_rowsperstrip), sizeof(uint16));
- if (tbuf_size == 0)
- return (0);
- 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) {
- TIFFError(module,
- "PixarLog compression can't handle bits depth/data format combination (depth: %d)",
- td->td_bitspersample);
- return (0);
- }
-
- if (inflateInit(&sp->stream) != Z_OK) {
- TIFFError(module, "%s: %s", tif->tif_name, sp->stream.msg);
- return (0);
- } else {
- sp->state |= PLSTATE_INIT;
- return (1);
- }
-}
-
-/*
- * Setup state for decoding a strip.
- */
-static int
-PixarLogPreDecode(TIFF* tif, tsample_t s)
-{
- PixarLogState* sp = DecoderState(tif);
-
- (void) s;
- assert(sp != NULL);
- sp->stream.next_in = tif->tif_rawdata;
- sp->stream.avail_in = tif->tif_rawcc;
- return (inflateReset(&sp->stream) == Z_OK);
-}
-
-static int
-PixarLogDecode(TIFF* tif, tidata_t op, tsize_t occ, tsample_t s)
-{
- TIFFDirectory *td = &tif->tif_dir;
- PixarLogState* sp = DecoderState(tif);
- static const char module[] = "PixarLogDecode";
- int i, nsamples, 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:
- TIFFError(tif->tif_name,
- "%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;
- sp->stream.avail_out = nsamples * sizeof(uint16);
- do {
- int state = inflate(&sp->stream, Z_PARTIAL_FLUSH);
- if (state == Z_STREAM_END) {
- break; /* XXX */
- }
- if (state == Z_DATA_ERROR) {
- TIFFError(module,
- "%s: Decoding error at scanline %d, %s",
- tif->tif_name, tif->tif_row, sp->stream.msg);
- if (inflateSync(&sp->stream) != Z_OK)
- return (0);
- continue;
- }
- if (state != Z_OK) {
- TIFFError(module, "%s: zlib error: %s",
- tif->tif_name, 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) {
- TIFFError(module,
- "%s: Not enough data at scanline %d (short %d bytes)",
- tif->tif_name, tif->tif_row, 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);
-
- 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:
- TIFFError(tif->tif_name,
- "PixarLogDecode: unsupported bits/sample: %d",
- td->td_bitspersample);
- return (0);
- }
- }
-
- return (1);
-}
-
-static int
-PixarLogSetupEncode(TIFF* tif)
-{
- TIFFDirectory *td = &tif->tif_dir;
- PixarLogState* sp = EncoderState(tif);
- tsize_t tbuf_size;
- static const char module[] = "PixarLogSetupEncode";
-
- 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(multiply(multiply(sp->stride, td->td_imagewidth),
- td->td_rowsperstrip), sizeof(uint16));
- if (tbuf_size == 0)
- return (0);
- 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) {
- TIFFError(module, "PixarLog compression can't handle %d bit linear encodings", td->td_bitspersample);
- return (0);
- }
-
- if (deflateInit(&sp->stream, sp->quality) != Z_OK) {
- TIFFError(module, "%s: %s", tif->tif_name, 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, tsample_t s)
-{
- PixarLogState *sp = EncoderState(tif);
-
- (void) s;
- assert(sp != NULL);
- sp->stream.next_out = tif->tif_rawdata;
- sp->stream.avail_out = tif->tif_rawdatasize;
- 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, tidata_t bp, tsize_t cc, tsample_t s)
-{
- TIFFDirectory *td = &tif->tif_dir;
- PixarLogState *sp = EncoderState(tif);
- static const char module[] = "PixarLogEncode";
- int i, n, 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:
- TIFFError(tif->tif_name,
- "%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:
- TIFFError(tif->tif_name,
- "%d bit input not supported in PixarLog",
- td->td_bitspersample);
- return 0;
- }
- }
-
- sp->stream.next_in = (unsigned char *) sp->tbuf;
- sp->stream.avail_in = n * sizeof(uint16);
-
- do {
- if (deflate(&sp->stream, Z_NO_FLUSH) != Z_OK) {
- TIFFError(module, "%s: Encoder error: %s",
- tif->tif_name, 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 = tif->tif_rawdatasize;
- }
- } 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)
-{
- PixarLogState *sp = EncoderState(tif);
- static const char module[] = "PixarLogPostEncode";
- int state;
-
- sp->stream.avail_in = 0;
-
- do {
- state = deflate(&sp->stream, Z_FINISH);
- switch (state) {
- case Z_STREAM_END:
- case Z_OK:
- if (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 = tif->tif_rawdatasize;
- }
- break;
- default:
- TIFFError(module, "%s: zlib error: %s",
- tif->tif_name, 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 maneuver, 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;
-
- if (sp) {
- 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;
- }
-}
-
-static int
-PixarLogVSetField(TIFF* tif, ttag_t tag, va_list ap)
-{
- PixarLogState *sp = (PixarLogState *)tif->tif_data;
- int result;
- static const char module[] = "PixarLogVSetField";
-
- switch (tag) {
- case TIFFTAG_PIXARLOGQUALITY:
- sp->quality = 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) {
- TIFFError(module, "%s: zlib error: %s",
- tif->tif_name, sp->stream.msg);
- return (0);
- }
- }
- return (1);
- case TIFFTAG_PIXARLOGDATAFMT:
- sp->user_datafmt = 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) : (tsize_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, ttag_t 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 TIFFFieldInfo pixarlogFieldInfo[] = {
- {TIFFTAG_PIXARLOGDATAFMT,0,0,TIFF_ANY, FIELD_PSEUDO,FALSE,FALSE,""},
- {TIFFTAG_PIXARLOGQUALITY,0,0,TIFF_ANY, FIELD_PSEUDO,FALSE,FALSE,""}
-};
-
-int
-TIFFInitPixarLog(TIFF* tif, int scheme)
-{
- PixarLogState* sp;
-
- assert(scheme == COMPRESSION_PIXARLOG);
-
- /*
- * Allocate state block so tag methods have storage to record values.
- */
- tif->tif_data = (tidata_t) _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_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 */
- _TIFFMergeFieldInfo(tif, pixarlogFieldInfo, N(pixarlogFieldInfo));
- 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:
- TIFFError("TIFFInitPixarLog", "No space for PixarLog state block");
- return (0);
-}
-#endif /* PIXARLOG_SUPPORT */
-
-/* vim: set ts=8 sts=8 sw=8 noet: */
projects / opencv / blobdiff