mirror of
https://github.com/reactos/reactos.git
synced 2024-09-11 05:12:43 +00:00
![Klemens Friedl](/assets/img/avatar_default.png)
* sumatrapdf - vendor import * everything compiles (libjpeg, poppler, fitz, sumatrapdf) * does NOT link (remove the comment tags in the parent directory.rbuild file (rosapps dir) to build it) svn path=/trunk/; revision=29295
654 lines
15 KiB
C
654 lines
15 KiB
C
/*
|
|
* Minimal TIFF image loader. Baseline TIFF 6.0 with CMYK support.
|
|
* Limited bit depth and extra samples support, as per Metro.
|
|
*/
|
|
|
|
#include "fitz.h"
|
|
#include "samus.h"
|
|
|
|
typedef struct sa_tiff_s sa_tiff;
|
|
|
|
struct sa_tiff_s
|
|
{
|
|
/* file and byte order */
|
|
fz_stream *file;
|
|
unsigned order;
|
|
|
|
/* where we can find the strips of image data */
|
|
unsigned rowsperstrip;
|
|
unsigned *stripoffsets;
|
|
unsigned *stripbytecounts;
|
|
|
|
/* colormap */
|
|
unsigned *colormap;
|
|
|
|
/* assorted tags */
|
|
unsigned subfiletype;
|
|
unsigned photometric;
|
|
unsigned compression;
|
|
unsigned imagewidth;
|
|
unsigned imagelength;
|
|
unsigned samplesperpixel;
|
|
unsigned bitspersample;
|
|
unsigned planar;
|
|
unsigned xresolution;
|
|
unsigned yresolution;
|
|
unsigned resolutionunit;
|
|
unsigned fillorder;
|
|
unsigned g3opts;
|
|
unsigned g4opts;
|
|
};
|
|
|
|
enum
|
|
{
|
|
TII = 0x4949, /* 'II' */
|
|
TMM = 0x4d4d, /* 'MM' */
|
|
TBYTE = 1,
|
|
TASCII = 2,
|
|
TSHORT = 3,
|
|
TLONG = 4,
|
|
TRATIONAL = 5
|
|
};
|
|
|
|
#define NewSubfileType 254
|
|
#define ImageWidth 256
|
|
#define ImageLength 257
|
|
#define BitsPerSample 258
|
|
#define Compression 259
|
|
#define PhotometricInterpretation 262
|
|
#define FillOrder 266
|
|
#define StripOffsets 273
|
|
#define SamplesPerPixel 277
|
|
#define RowsPerStrip 278
|
|
#define StripByteCounts 279
|
|
#define XResolution 282
|
|
#define YResolution 283
|
|
#define PlanarConfiguration 284
|
|
#define T4Options 292
|
|
#define T6Options 293
|
|
#define ResolutionUnit 296
|
|
#define ColorMap 320
|
|
|
|
static const unsigned char bitrev[256] =
|
|
{
|
|
0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
|
|
0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
|
|
0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
|
|
0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
|
|
0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
|
|
0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
|
|
0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
|
|
0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
|
|
0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
|
|
0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
|
|
0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
|
|
0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
|
|
0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
|
|
0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
|
|
0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
|
|
0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
|
|
0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
|
|
0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
|
|
0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
|
|
0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
|
|
0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
|
|
0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
|
|
0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
|
|
0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
|
|
0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
|
|
0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
|
|
0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
|
|
0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
|
|
0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
|
|
0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
|
|
0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
|
|
0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
|
|
};
|
|
|
|
static inline unsigned readshort(sa_tiff *tiff)
|
|
{
|
|
unsigned a = fz_readbyte(tiff->file);
|
|
unsigned b = fz_readbyte(tiff->file);
|
|
if (tiff->order == TII)
|
|
return (b << 8) | a;
|
|
return (a << 8) | b;
|
|
}
|
|
|
|
static inline unsigned readlong(sa_tiff *tiff)
|
|
{
|
|
unsigned a = fz_readbyte(tiff->file);
|
|
unsigned b = fz_readbyte(tiff->file);
|
|
unsigned c = fz_readbyte(tiff->file);
|
|
unsigned d = fz_readbyte(tiff->file);
|
|
if (tiff->order == TII)
|
|
return (d << 24) | (c << 16) | (b << 8) | a;
|
|
return (a << 24) | (b << 16) | (c << 8) | d;
|
|
}
|
|
|
|
static void
|
|
readtagval(unsigned *p, sa_tiff *tiff, unsigned type, unsigned ofs, unsigned n)
|
|
{
|
|
fz_seek(tiff->file, ofs, 0);
|
|
while (n--)
|
|
{
|
|
switch (type)
|
|
{
|
|
case TRATIONAL:
|
|
*p = readlong(tiff);
|
|
*p = *p / readlong(tiff);
|
|
p ++;
|
|
break;
|
|
case TBYTE: *p++ = fz_readbyte(tiff->file); break;
|
|
case TSHORT: *p++ = readshort(tiff); break;
|
|
case TLONG: *p++ = readlong(tiff); break;
|
|
default: *p++ = 0; break;
|
|
}
|
|
}
|
|
}
|
|
|
|
static void
|
|
tiffdebug(sa_tiff *tiff)
|
|
{
|
|
int i, n;
|
|
|
|
printf("TIFF <<\n");
|
|
printf("\t/NewSubfileType %u\n", tiff->subfiletype);
|
|
printf("\t/PhotometricInterpretation %u\n", tiff->photometric);
|
|
printf("\t/Compression %u\n", tiff->compression);
|
|
printf("\t/ImageWidth %u\n", tiff->imagewidth);
|
|
printf("\t/ImageLength %u\n", tiff->imagelength);
|
|
printf("\t/BitsPerSample %u\n", tiff->bitspersample);
|
|
printf("\t/SamplesPerPixel %u\n", tiff->samplesperpixel);
|
|
printf("\t/PlanarConfiguration %u\n", tiff->planar);
|
|
printf("\t/XResolution %u\n", tiff->xresolution);
|
|
printf("\t/YResolution %u\n", tiff->yresolution);
|
|
printf("\t/ResolutionUnit %u\n", tiff->resolutionunit);
|
|
printf("\t/FillOrder %u\n", tiff->fillorder);
|
|
printf("\t/T4Options %u\n", tiff->g3opts);
|
|
printf("\t/T6Options %u\n", tiff->g4opts);
|
|
|
|
printf("\t/ColorMap $%p\n", tiff->colormap);
|
|
|
|
n = (tiff->imagelength + tiff->rowsperstrip - 1) / tiff->rowsperstrip;
|
|
|
|
printf("\t/RowsPerStrip %u\n", tiff->rowsperstrip);
|
|
|
|
if (tiff->stripoffsets)
|
|
{
|
|
printf("\t/StripOffsets [\n");
|
|
for (i = 0; i < n; i++)
|
|
printf("\t\t%u\n", tiff->stripoffsets[i]);
|
|
printf("\t]\n");
|
|
}
|
|
|
|
if (tiff->stripbytecounts)
|
|
{
|
|
printf("\t/StripByteCounts [\n");
|
|
for (i = 0; i < n; i++)
|
|
printf("\t\t%u\n", tiff->stripbytecounts[i]);
|
|
printf("\t]\n");
|
|
}
|
|
|
|
printf(">>\n");
|
|
}
|
|
|
|
static fz_error *
|
|
tiffreaduncompressed(sa_tiff *tiff, unsigned char *mem, unsigned len)
|
|
{
|
|
printf("uncompressed %d bytes\n", len);
|
|
return nil;
|
|
}
|
|
|
|
static fz_error *
|
|
tiffreadfiltered(sa_tiff *tiff,
|
|
unsigned char *mem, unsigned len, fz_filter *filter)
|
|
{
|
|
fz_error *error;
|
|
fz_buffer *buf;
|
|
fz_buffer *out;
|
|
int count = 0;
|
|
|
|
printf("compressed %d bytes\n", len);
|
|
|
|
error = fz_newbufferwithmemory(&buf, mem, len);
|
|
if (error)
|
|
return error;
|
|
|
|
error = fz_newbuffer(&out, FZ_BUFSIZE);
|
|
if (error)
|
|
{
|
|
fz_dropbuffer(buf);
|
|
return error;
|
|
}
|
|
|
|
buf->eof = 1;
|
|
|
|
while (1)
|
|
{
|
|
error = fz_process(filter, buf, out);
|
|
|
|
printf(" + %d bytes\n", out->wp - out->rp);
|
|
|
|
count += out->wp - out->rp;
|
|
|
|
if (error == fz_ioneedin)
|
|
{
|
|
error = fz_throw("ioerror: premature eof in filter");
|
|
goto cleanup;
|
|
}
|
|
else if (error == fz_ioneedout)
|
|
{
|
|
if (out->wp - out->rp == 0)
|
|
{
|
|
error = fz_growbuffer(out);
|
|
if (error)
|
|
goto cleanup;
|
|
}
|
|
out->rp = out->bp;
|
|
out->wp = out->bp;
|
|
}
|
|
else if (error == fz_iodone)
|
|
{
|
|
break;
|
|
}
|
|
else
|
|
goto cleanup;
|
|
}
|
|
|
|
printf(" = %d bytes\n", count);
|
|
|
|
return nil;
|
|
|
|
cleanup:
|
|
printf("cleanup\n");
|
|
fz_dropbuffer(out);
|
|
fz_dropbuffer(buf);
|
|
return error;
|
|
}
|
|
|
|
static fz_error *
|
|
tiffreadpackbits(sa_tiff *tiff, unsigned char *mem, unsigned len)
|
|
{
|
|
fz_error *error;
|
|
fz_filter *filter;
|
|
|
|
error = fz_newrld(&filter, 0);
|
|
if (error)
|
|
return error;
|
|
|
|
error = tiffreadfiltered(tiff, mem, len, filter);
|
|
fz_dropfilter(filter);
|
|
return error;
|
|
}
|
|
|
|
static fz_error *
|
|
tiffreadfax(sa_tiff *tiff, unsigned char *mem, unsigned len, int comp)
|
|
{
|
|
fz_error *error;
|
|
fz_filter *filter;
|
|
fz_obj *params;
|
|
|
|
switch (comp)
|
|
{
|
|
default:
|
|
case 2:
|
|
error = fz_packobj(¶ms,
|
|
"<< /EncodedByteAlign true /EndOfLine false /EndOfBlock false "
|
|
"/K 0 /Columns %i /Rows %i /BlackIs1 %b >>",
|
|
tiff->imagewidth,
|
|
tiff->imagelength,
|
|
tiff->photometric == 0);
|
|
break;
|
|
case 3:
|
|
error = fz_packobj(¶ms,
|
|
"<< /EndOfLine false /EndOfBlock false "
|
|
"/K %i /Columns %i /Rows %i /BlackIs1 %b >>",
|
|
(tiff->g3opts & 1) ? tiff->rowsperstrip : 0,
|
|
tiff->imagewidth,
|
|
tiff->imagelength,
|
|
tiff->photometric == 0);
|
|
break;
|
|
case 4:
|
|
error = fz_packobj(¶ms,
|
|
"<< /EndOfLine false /EndOfBlock false "
|
|
"/K -1 /Columns %i /Rows %i /BlackIs1 %b >>",
|
|
tiff->imagewidth,
|
|
tiff->imagelength,
|
|
tiff->photometric == 0);
|
|
break;
|
|
}
|
|
|
|
if (error)
|
|
return error;
|
|
|
|
error = fz_newfaxd(&filter, params);
|
|
fz_dropobj(params);
|
|
if (error)
|
|
return error;
|
|
|
|
error = tiffreadfiltered(tiff, mem, len, filter);
|
|
fz_dropfilter(filter);
|
|
return error;
|
|
}
|
|
|
|
static fz_error *
|
|
tiffreadlzw(sa_tiff *tiff, unsigned char *mem, unsigned len)
|
|
{
|
|
fz_error *error;
|
|
fz_filter *filter;
|
|
fz_obj *params;
|
|
|
|
error = fz_packobj(¶ms, "<</EarlyChange 0>>");
|
|
if (error)
|
|
return error;
|
|
|
|
error = fz_newlzwd(&filter, params);
|
|
fz_dropobj(params);
|
|
if (error)
|
|
return error;
|
|
|
|
error = tiffreadfiltered(tiff, mem, len, filter);
|
|
fz_dropfilter(filter);
|
|
return error;
|
|
}
|
|
|
|
static fz_error *
|
|
tiffreadstrips(sa_tiff *tiff)
|
|
{
|
|
/* switch on compression to create a filter */
|
|
/* feed each strip to the filter */
|
|
/* read out the data and pack the samples into an sa_image */
|
|
|
|
/* type 32773 / packbits -- nothing special (same row-padding as PDF) */
|
|
/* type 2 / ccitt rle -- no EOL, no RTC, rows are byte-aligned */
|
|
/* type 3 and 4 / g3 and g4 -- each strip starts new section */
|
|
/* type 5 / lzw -- each strip is handled separately */
|
|
|
|
fz_error *error;
|
|
unsigned char *mem;
|
|
|
|
int row;
|
|
int strip;
|
|
int len;
|
|
int i;
|
|
|
|
printf("TIFF ");
|
|
printf("w=%d h=%d n=%d bpc=%d ",
|
|
tiff->imagewidth, tiff->imagelength,
|
|
tiff->samplesperpixel, tiff->bitspersample);
|
|
|
|
switch (tiff->photometric)
|
|
{
|
|
case 0: printf("WhiteIsZero "); break;
|
|
case 1: printf("BlackIsZero "); break;
|
|
case 2: printf("RGB "); break;
|
|
case 3: printf("RGBPal "); break;
|
|
case 5: printf("CMYK "); break;
|
|
default: return fz_throw("ioerror: unknown TIFF color space: %d", tiff->photometric);
|
|
}
|
|
|
|
switch (tiff->compression)
|
|
{
|
|
case 1: printf("Uncompressed "); break;
|
|
case 2: printf("CCITT "); break;
|
|
case 3: printf("FaxG3"); break;
|
|
case 4: printf("FaxG4"); break;
|
|
case 5: printf("LZW "); break;
|
|
case 32773: printf("PackBits "); break;
|
|
default:
|
|
return fz_throw("ioerror: unknown TIFF compression: %d", tiff->compression);
|
|
}
|
|
|
|
printf("\n");
|
|
|
|
strip = 0;
|
|
for (row = 0; row < tiff->imagelength; row += tiff->rowsperstrip)
|
|
{
|
|
unsigned offset = tiff->stripoffsets[strip];
|
|
unsigned bytecount = tiff->stripbytecounts[strip];
|
|
|
|
mem = fz_malloc(bytecount);
|
|
if (!mem)
|
|
return fz_outofmem;
|
|
|
|
fz_seek(tiff->file, offset, 0);
|
|
len = fz_read(tiff->file, mem, bytecount);
|
|
if (len < 0)
|
|
{
|
|
fz_free(mem);
|
|
return fz_ioerror(tiff->file);
|
|
}
|
|
|
|
if (tiff->fillorder == 2)
|
|
for (i = 0; i < len; i++)
|
|
mem[i] = bitrev[mem[i]];
|
|
|
|
switch (tiff->compression)
|
|
{
|
|
case 1: error = tiffreaduncompressed(tiff, mem, len); break;
|
|
case 2: error = tiffreadfax(tiff, mem, len, 2); break;
|
|
case 3: error = tiffreadfax(tiff, mem, len, 3); break;
|
|
case 4: error = tiffreadfax(tiff, mem, len, 4); break;
|
|
case 5: error = tiffreadlzw(tiff, mem, len); break;
|
|
case 32773: error = tiffreadpackbits(tiff, mem, len); break;
|
|
}
|
|
|
|
fz_free(mem);
|
|
|
|
if (error)
|
|
return error;
|
|
|
|
strip ++;
|
|
}
|
|
|
|
if (tiff->photometric == 3 && tiff->colormap)
|
|
{
|
|
/* TODO expand RGBPal datain buf via colormap to output */
|
|
}
|
|
else
|
|
{
|
|
/* TODO copy buf to output */
|
|
}
|
|
|
|
return nil;
|
|
}
|
|
|
|
static fz_error *
|
|
tiffreadtag(sa_tiff *tiff, unsigned offset)
|
|
{
|
|
unsigned tag;
|
|
unsigned type;
|
|
unsigned count;
|
|
unsigned value;
|
|
|
|
fz_seek(tiff->file, offset, 0);
|
|
tag = readshort(tiff);
|
|
type = readshort(tiff);
|
|
count = readlong(tiff);
|
|
|
|
if ((type == TBYTE && count <= 4) ||
|
|
(type == TSHORT && count <= 2) ||
|
|
(type == TLONG && count <= 1))
|
|
value = fz_tell(tiff->file);
|
|
else
|
|
value = readlong(tiff);
|
|
|
|
switch (tag)
|
|
{
|
|
case NewSubfileType:
|
|
readtagval(&tiff->subfiletype, tiff, type, value, 1);
|
|
break;
|
|
case ImageWidth:
|
|
readtagval(&tiff->imagewidth, tiff, type, value, 1);
|
|
break;
|
|
case ImageLength:
|
|
readtagval(&tiff->imagelength, tiff, type, value, 1);
|
|
break;
|
|
case BitsPerSample:
|
|
readtagval(&tiff->bitspersample, tiff, type, value, 1);
|
|
break;
|
|
case Compression:
|
|
readtagval(&tiff->compression, tiff, type, value, 1);
|
|
break;
|
|
case PhotometricInterpretation:
|
|
readtagval(&tiff->photometric, tiff, type, value, 1);
|
|
break;
|
|
case FillOrder:
|
|
readtagval(&tiff->fillorder, tiff, type, value, 1);
|
|
break;
|
|
case SamplesPerPixel:
|
|
readtagval(&tiff->samplesperpixel, tiff, type, value, 1);
|
|
break;
|
|
case RowsPerStrip:
|
|
readtagval(&tiff->rowsperstrip, tiff, type, value, 1);
|
|
break;
|
|
case XResolution:
|
|
readtagval(&tiff->xresolution, tiff, type, value, 1);
|
|
break;
|
|
case YResolution:
|
|
readtagval(&tiff->yresolution, tiff, type, value, 1);
|
|
break;
|
|
case PlanarConfiguration:
|
|
readtagval(&tiff->planar, tiff, type, value, 1);
|
|
break;
|
|
case T4Options:
|
|
readtagval(&tiff->g3opts, tiff, type, value, 1);
|
|
break;
|
|
case T6Options:
|
|
readtagval(&tiff->g4opts, tiff, type, value, 1);
|
|
break;
|
|
case ResolutionUnit:
|
|
readtagval(&tiff->resolutionunit, tiff, type, value, 1);
|
|
break;
|
|
|
|
case StripOffsets:
|
|
tiff->stripoffsets = fz_malloc(count * sizeof(unsigned));
|
|
if (!tiff->stripoffsets)
|
|
return fz_outofmem;
|
|
readtagval(tiff->stripoffsets, tiff, type, value, count);
|
|
break;
|
|
|
|
case StripByteCounts:
|
|
tiff->stripbytecounts = fz_malloc(count * sizeof(unsigned));
|
|
if (!tiff->stripbytecounts)
|
|
return fz_outofmem;
|
|
readtagval(tiff->stripbytecounts, tiff, type, value, count);
|
|
break;
|
|
|
|
case ColorMap:
|
|
tiff->colormap = fz_malloc(count * sizeof(unsigned));
|
|
if (!tiff->colormap)
|
|
return fz_outofmem;
|
|
readtagval(tiff->colormap, tiff, type, value, count);
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
printf("unknown tag: %d t=%d n=%d\n", tag, type, count);
|
|
*/
|
|
break;
|
|
}
|
|
|
|
return nil;
|
|
}
|
|
|
|
static fz_error *
|
|
tiffreadifd(sa_tiff *tiff, unsigned offset)
|
|
{
|
|
fz_error *error;
|
|
unsigned count;
|
|
unsigned i;
|
|
|
|
fz_seek(tiff->file, offset, 0);
|
|
count = readshort(tiff);
|
|
|
|
offset += 2;
|
|
for (i = 0; i < count; i++)
|
|
{
|
|
error = tiffreadtag(tiff, offset);
|
|
if (error)
|
|
return error;
|
|
offset += 12;
|
|
}
|
|
|
|
if (getenv("TIFFDEBUG"))
|
|
tiffdebug(tiff);
|
|
|
|
return tiffreadstrips(tiff);
|
|
}
|
|
|
|
static fz_error *
|
|
tiffreadifh(sa_tiff *tiff, fz_stream *file)
|
|
{
|
|
unsigned version;
|
|
unsigned offset;
|
|
|
|
memset(tiff, 0, sizeof(sa_tiff));
|
|
tiff->file = file;
|
|
|
|
/* tag defaults, where applicable */
|
|
tiff->bitspersample = 1;
|
|
tiff->compression = 1;
|
|
tiff->samplesperpixel = 1;
|
|
tiff->resolutionunit = 2;
|
|
tiff->rowsperstrip = 0xFFFFFFFF;
|
|
tiff->fillorder = 1;
|
|
tiff->planar = 1;
|
|
tiff->subfiletype = 0;
|
|
|
|
/* get byte order marker */
|
|
tiff->order = TII;
|
|
tiff->order = readshort(tiff);
|
|
if (tiff->order != TII && tiff->order != TMM)
|
|
return fz_throw("ioerror: not a TIFF file");
|
|
|
|
/* check version */
|
|
version = readshort(tiff);
|
|
if (version != 42)
|
|
return fz_throw("ioerror: not a TIFF file");
|
|
|
|
/* get offset of IFD and then read it */
|
|
offset = readlong(tiff);
|
|
return tiffreadifd(tiff, offset);
|
|
}
|
|
|
|
fz_error *
|
|
sa_readtiff(fz_stream *file)
|
|
{
|
|
fz_error *error;
|
|
fz_buffer *buf;
|
|
fz_stream *newfile;
|
|
sa_tiff tiff;
|
|
int n;
|
|
|
|
/* TIFF requires random access. In Metro TIFFs are embedded in ZIP files.
|
|
* Compressed streams are not seekable, so we copy the data to an
|
|
* in-memory data buffer instead of reading from the original stream.
|
|
*/
|
|
|
|
n = fz_readall(&buf, file);
|
|
if (n < 0)
|
|
return fz_ioerror(file);
|
|
|
|
printf("readall -> %d\n", n);
|
|
|
|
error = fz_openrbuffer(&newfile, buf);
|
|
if (error)
|
|
{
|
|
fz_dropbuffer(buf);
|
|
return error;
|
|
}
|
|
|
|
error = tiffreadifh(&tiff, newfile);
|
|
|
|
fz_free(tiff.colormap);
|
|
fz_free(tiff.stripoffsets);
|
|
fz_free(tiff.stripbytecounts);
|
|
|
|
fz_dropstream(newfile);
|
|
fz_dropbuffer(buf);
|
|
|
|
return error;
|
|
}
|
|
|