--- /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