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tif_getimage.c
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tif_getimage.c
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/* $Id: tif_getimage.c,v 1.82 2012-06-06 00:17:49 fwarmerdam Exp $ */
/*
* Copyright (c) 1991-1997 Sam Leffler
* Copyright (c) 1991-1997 Silicon Graphics, Inc.
*
* 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
* 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 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 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.
*/
/*
* TIFF Library
*
* Read and return a packed RGBA image.
*/
#include "tiffiop.h"
#include <stdio.h>
static int gtTileContig(TIFFRGBAImage*, uint32*, uint32, uint32);
static int gtTileSeparate(TIFFRGBAImage*, uint32*, uint32, uint32);
static int gtStripContig(TIFFRGBAImage*, uint32*, uint32, uint32);
static int gtStripSeparate(TIFFRGBAImage*, uint32*, uint32, uint32);
static int PickContigCase(TIFFRGBAImage*);
static int PickSeparateCase(TIFFRGBAImage*);
static int BuildMapUaToAa(TIFFRGBAImage* img);
static int BuildMapBitdepth16To8(TIFFRGBAImage* img);
static const char photoTag[] = "PhotometricInterpretation";
/*
* Helper constants used in Orientation tag handling
*/
#define FLIP_VERTICALLY 0x01
#define FLIP_HORIZONTALLY 0x02
/*
* Color conversion constants. We will define display types here.
*/
static const TIFFDisplay display_sRGB = {
{ /* XYZ -> luminance matrix */
{ 3.2410F, -1.5374F, -0.4986F },
{ -0.9692F, 1.8760F, 0.0416F },
{ 0.0556F, -0.2040F, 1.0570F }
},
100.0F, 100.0F, 100.0F, /* Light o/p for reference white */
255, 255, 255, /* Pixel values for ref. white */
1.0F, 1.0F, 1.0F, /* Residual light o/p for black pixel */
2.4F, 2.4F, 2.4F, /* Gamma values for the three guns */
};
/*
* Check the image to see if TIFFReadRGBAImage can deal with it.
* 1/0 is returned according to whether or not the image can
* be handled. If 0 is returned, emsg contains the reason
* why it is being rejected.
*/
int
TIFFRGBAImageOK(TIFF* tif, char emsg[1024])
{
TIFFDirectory* td = &tif->tif_dir;
uint16 photometric;
int colorchannels;
if (!tif->tif_decodestatus) {
sprintf(emsg, "Sorry, requested compression method is not configured");
return (0);
}
switch (td->td_bitspersample) {
case 1:
case 2:
case 4:
case 8:
case 16:
break;
default:
sprintf(emsg, "Sorry, can not handle images with %d-bit samples",
td->td_bitspersample);
return (0);
}
colorchannels = td->td_samplesperpixel - td->td_extrasamples;
if (!TIFFGetField(tif, TIFFTAG_PHOTOMETRIC, &photometric)) {
switch (colorchannels) {
case 1:
photometric = PHOTOMETRIC_MINISBLACK;
break;
case 3:
photometric = PHOTOMETRIC_RGB;
break;
default:
sprintf(emsg, "Missing needed %s tag", photoTag);
return (0);
}
}
switch (photometric) {
case PHOTOMETRIC_MINISWHITE:
case PHOTOMETRIC_MINISBLACK:
case PHOTOMETRIC_PALETTE:
if (td->td_planarconfig == PLANARCONFIG_CONTIG
&& td->td_samplesperpixel != 1
&& td->td_bitspersample < 8 ) {
sprintf(emsg,
"Sorry, can not handle contiguous data with %s=%d, "
"and %s=%d and Bits/Sample=%d",
photoTag, photometric,
"Samples/pixel", td->td_samplesperpixel,
td->td_bitspersample);
return (0);
}
/*
* We should likely validate that any extra samples are either
* to be ignored, or are alpha, and if alpha we should try to use
* them. But for now we won't bother with this.
*/
break;
case PHOTOMETRIC_YCBCR:
/*
* TODO: if at all meaningful and useful, make more complete
* support check here, or better still, refactor to let supporting
* code decide whether there is support and what meaningfull
* error to return
*/
break;
case PHOTOMETRIC_RGB:
if (colorchannels < 3) {
sprintf(emsg, "Sorry, can not handle RGB image with %s=%d",
"Color channels", colorchannels);
return (0);
}
break;
case PHOTOMETRIC_SEPARATED:
{
uint16 inkset;
TIFFGetFieldDefaulted(tif, TIFFTAG_INKSET, &inkset);
if (inkset != INKSET_CMYK) {
sprintf(emsg,
"Sorry, can not handle separated image with %s=%d",
"InkSet", inkset);
return 0;
}
if (td->td_samplesperpixel < 4) {
sprintf(emsg,
"Sorry, can not handle separated image with %s=%d",
"Samples/pixel", td->td_samplesperpixel);
return 0;
}
break;
}
case PHOTOMETRIC_LOGL:
if (td->td_compression != COMPRESSION_SGILOG) {
sprintf(emsg, "Sorry, LogL data must have %s=%d",
"Compression", COMPRESSION_SGILOG);
return (0);
}
break;
case PHOTOMETRIC_LOGLUV:
if (td->td_compression != COMPRESSION_SGILOG &&
td->td_compression != COMPRESSION_SGILOG24) {
sprintf(emsg, "Sorry, LogLuv data must have %s=%d or %d",
"Compression", COMPRESSION_SGILOG, COMPRESSION_SGILOG24);
return (0);
}
if (td->td_planarconfig != PLANARCONFIG_CONTIG) {
sprintf(emsg, "Sorry, can not handle LogLuv images with %s=%d",
"Planarconfiguration", td->td_planarconfig);
return (0);
}
break;
case PHOTOMETRIC_CIELAB:
break;
default:
sprintf(emsg, "Sorry, can not handle image with %s=%d",
photoTag, photometric);
return (0);
}
return (1);
}
void
TIFFRGBAImageEnd(TIFFRGBAImage* img)
{
if (img->Map)
_TIFFfree(img->Map), img->Map = NULL;
if (img->BWmap)
_TIFFfree(img->BWmap), img->BWmap = NULL;
if (img->PALmap)
_TIFFfree(img->PALmap), img->PALmap = NULL;
if (img->ycbcr)
_TIFFfree(img->ycbcr), img->ycbcr = NULL;
if (img->cielab)
_TIFFfree(img->cielab), img->cielab = NULL;
if (img->UaToAa)
_TIFFfree(img->UaToAa), img->UaToAa = NULL;
if (img->Bitdepth16To8)
_TIFFfree(img->Bitdepth16To8), img->Bitdepth16To8 = NULL;
if( img->redcmap ) {
_TIFFfree( img->redcmap );
_TIFFfree( img->greencmap );
_TIFFfree( img->bluecmap );
img->redcmap = img->greencmap = img->bluecmap = NULL;
}
}
static int
isCCITTCompression(TIFF* tif)
{
uint16 compress;
TIFFGetField(tif, TIFFTAG_COMPRESSION, &compress);
return (compress == COMPRESSION_CCITTFAX3 ||
compress == COMPRESSION_CCITTFAX4 ||
compress == COMPRESSION_CCITTRLE ||
compress == COMPRESSION_CCITTRLEW);
}
int
TIFFRGBAImageBegin(TIFFRGBAImage* img, TIFF* tif, int stop, char emsg[1024])
{
uint16* sampleinfo;
uint16 extrasamples;
uint16 planarconfig;
uint16 compress;
int colorchannels;
uint16 *red_orig, *green_orig, *blue_orig;
int n_color;
/* Initialize to normal values */
img->row_offset = 0;
img->col_offset = 0;
img->redcmap = NULL;
img->greencmap = NULL;
img->bluecmap = NULL;
img->req_orientation = ORIENTATION_BOTLEFT; /* It is the default */
img->tif = tif;
img->stoponerr = stop;
TIFFGetFieldDefaulted(tif, TIFFTAG_BITSPERSAMPLE, &img->bitspersample);
switch (img->bitspersample) {
case 1:
case 2:
case 4:
case 8:
case 16:
break;
default:
sprintf(emsg, "Sorry, can not handle images with %d-bit samples",
img->bitspersample);
goto fail_return;
}
img->alpha = 0;
TIFFGetFieldDefaulted(tif, TIFFTAG_SAMPLESPERPIXEL, &img->samplesperpixel);
TIFFGetFieldDefaulted(tif, TIFFTAG_EXTRASAMPLES,
&extrasamples, &sampleinfo);
if (extrasamples >= 1)
{
switch (sampleinfo[0]) {
case EXTRASAMPLE_UNSPECIFIED: /* Workaround for some images without */
if (img->samplesperpixel > 3) /* correct info about alpha channel */
img->alpha = EXTRASAMPLE_ASSOCALPHA;
break;
case EXTRASAMPLE_ASSOCALPHA: /* data is pre-multiplied */
case EXTRASAMPLE_UNASSALPHA: /* data is not pre-multiplied */
img->alpha = sampleinfo[0];
break;
}
}
#ifdef DEFAULT_EXTRASAMPLE_AS_ALPHA
if( !TIFFGetField(tif, TIFFTAG_PHOTOMETRIC, &img->photometric))
img->photometric = PHOTOMETRIC_MINISWHITE;
if( extrasamples == 0
&& img->samplesperpixel == 4
&& img->photometric == PHOTOMETRIC_RGB )
{
img->alpha = EXTRASAMPLE_ASSOCALPHA;
extrasamples = 1;
}
#endif
colorchannels = img->samplesperpixel - extrasamples;
TIFFGetFieldDefaulted(tif, TIFFTAG_COMPRESSION, &compress);
TIFFGetFieldDefaulted(tif, TIFFTAG_PLANARCONFIG, &planarconfig);
if (!TIFFGetField(tif, TIFFTAG_PHOTOMETRIC, &img->photometric)) {
switch (colorchannels) {
case 1:
if (isCCITTCompression(tif))
img->photometric = PHOTOMETRIC_MINISWHITE;
else
img->photometric = PHOTOMETRIC_MINISBLACK;
break;
case 3:
img->photometric = PHOTOMETRIC_RGB;
break;
default:
sprintf(emsg, "Missing needed %s tag", photoTag);
goto fail_return;
}
}
switch (img->photometric) {
case PHOTOMETRIC_PALETTE:
if (!TIFFGetField(tif, TIFFTAG_COLORMAP,
&red_orig, &green_orig, &blue_orig)) {
sprintf(emsg, "Missing required \"Colormap\" tag");
goto fail_return;
}
/* copy the colormaps so we can modify them */
n_color = (1L << img->bitspersample);
img->redcmap = (uint16 *) _TIFFmalloc(sizeof(uint16)*n_color);
img->greencmap = (uint16 *) _TIFFmalloc(sizeof(uint16)*n_color);
img->bluecmap = (uint16 *) _TIFFmalloc(sizeof(uint16)*n_color);
if( !img->redcmap || !img->greencmap || !img->bluecmap ) {
sprintf(emsg, "Out of memory for colormap copy");
goto fail_return;
}
_TIFFmemcpy( img->redcmap, red_orig, n_color * 2 );
_TIFFmemcpy( img->greencmap, green_orig, n_color * 2 );
_TIFFmemcpy( img->bluecmap, blue_orig, n_color * 2 );
/* fall thru... */
case PHOTOMETRIC_MINISWHITE:
case PHOTOMETRIC_MINISBLACK:
if (planarconfig == PLANARCONFIG_CONTIG
&& img->samplesperpixel != 1
&& img->bitspersample < 8 ) {
sprintf(emsg,
"Sorry, can not handle contiguous data with %s=%d, "
"and %s=%d and Bits/Sample=%d",
photoTag, img->photometric,
"Samples/pixel", img->samplesperpixel,
img->bitspersample);
goto fail_return;
}
break;
case PHOTOMETRIC_YCBCR:
/* It would probably be nice to have a reality check here. */
if (planarconfig == PLANARCONFIG_CONTIG)
/* can rely on libjpeg to convert to RGB */
/* XXX should restore current state on exit */
switch (compress) {
case COMPRESSION_JPEG:
/*
* TODO: when complete tests verify complete desubsampling
* and YCbCr handling, remove use of TIFFTAG_JPEGCOLORMODE in
* favor of tif_getimage.c native handling
*/
TIFFSetField(tif, TIFFTAG_JPEGCOLORMODE, JPEGCOLORMODE_RGB);
img->photometric = PHOTOMETRIC_RGB;
break;
default:
/* do nothing */;
break;
}
/*
* TODO: if at all meaningful and useful, make more complete
* support check here, or better still, refactor to let supporting
* code decide whether there is support and what meaningfull
* error to return
*/
break;
case PHOTOMETRIC_RGB:
if (colorchannels < 3) {
sprintf(emsg, "Sorry, can not handle RGB image with %s=%d",
"Color channels", colorchannels);
goto fail_return;
}
break;
case PHOTOMETRIC_SEPARATED:
{
uint16 inkset;
TIFFGetFieldDefaulted(tif, TIFFTAG_INKSET, &inkset);
if (inkset != INKSET_CMYK) {
sprintf(emsg, "Sorry, can not handle separated image with %s=%d",
"InkSet", inkset);
goto fail_return;
}
if (img->samplesperpixel < 4) {
sprintf(emsg, "Sorry, can not handle separated image with %s=%d",
"Samples/pixel", img->samplesperpixel);
goto fail_return;
}
}
break;
case PHOTOMETRIC_LOGL:
if (compress != COMPRESSION_SGILOG) {
sprintf(emsg, "Sorry, LogL data must have %s=%d",
"Compression", COMPRESSION_SGILOG);
goto fail_return;
}
TIFFSetField(tif, TIFFTAG_SGILOGDATAFMT, SGILOGDATAFMT_8BIT);
img->photometric = PHOTOMETRIC_MINISBLACK; /* little white lie */
img->bitspersample = 8;
break;
case PHOTOMETRIC_LOGLUV:
if (compress != COMPRESSION_SGILOG && compress != COMPRESSION_SGILOG24) {
sprintf(emsg, "Sorry, LogLuv data must have %s=%d or %d",
"Compression", COMPRESSION_SGILOG, COMPRESSION_SGILOG24);
goto fail_return;
}
if (planarconfig != PLANARCONFIG_CONTIG) {
sprintf(emsg, "Sorry, can not handle LogLuv images with %s=%d",
"Planarconfiguration", planarconfig);
return (0);
}
TIFFSetField(tif, TIFFTAG_SGILOGDATAFMT, SGILOGDATAFMT_8BIT);
img->photometric = PHOTOMETRIC_RGB; /* little white lie */
img->bitspersample = 8;
break;
case PHOTOMETRIC_CIELAB:
break;
default:
sprintf(emsg, "Sorry, can not handle image with %s=%d",
photoTag, img->photometric);
goto fail_return;
}
img->Map = NULL;
img->BWmap = NULL;
img->PALmap = NULL;
img->ycbcr = NULL;
img->cielab = NULL;
img->UaToAa = NULL;
img->Bitdepth16To8 = NULL;
TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &img->width);
TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &img->height);
TIFFGetFieldDefaulted(tif, TIFFTAG_ORIENTATION, &img->orientation);
img->isContig =
!(planarconfig == PLANARCONFIG_SEPARATE && img->samplesperpixel > 1);
if (img->isContig) {
if (!PickContigCase(img)) {
sprintf(emsg, "Sorry, can not handle image");
goto fail_return;
}
} else {
if (!PickSeparateCase(img)) {
sprintf(emsg, "Sorry, can not handle image");
goto fail_return;
}
}
return 1;
fail_return:
_TIFFfree( img->redcmap );
_TIFFfree( img->greencmap );
_TIFFfree( img->bluecmap );
img->redcmap = img->greencmap = img->bluecmap = NULL;
return 0;
}
int
TIFFRGBAImageGet(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
{
if (img->get == NULL) {
TIFFErrorExt(img->tif->tif_clientdata, TIFFFileName(img->tif), "No \"get\" routine setup");
return (0);
}
if (img->put.any == NULL) {
TIFFErrorExt(img->tif->tif_clientdata, TIFFFileName(img->tif),
"No \"put\" routine setupl; probably can not handle image format");
return (0);
}
return (*img->get)(img, raster, w, h);
}
/*
* Read the specified image into an ABGR-format rastertaking in account
* specified orientation.
*/
int
TIFFReadRGBAImageOriented(TIFF* tif,
uint32 rwidth, uint32 rheight, uint32* raster,
int orientation, int stop)
{
char emsg[1024] = "";
TIFFRGBAImage img;
int ok;
if (TIFFRGBAImageOK(tif, emsg) && TIFFRGBAImageBegin(&img, tif, stop, emsg)) {
img.req_orientation = orientation;
/* XXX verify rwidth and rheight against width and height */
ok = TIFFRGBAImageGet(&img, raster+(rheight-img.height)*rwidth,
rwidth, img.height);
TIFFRGBAImageEnd(&img);
} else {
TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "%s", emsg);
ok = 0;
}
return (ok);
}
/*
* Read the specified image into an ABGR-format raster. Use bottom left
* origin for raster by default.
*/
int
TIFFReadRGBAImage(TIFF* tif,
uint32 rwidth, uint32 rheight, uint32* raster, int stop)
{
return TIFFReadRGBAImageOriented(tif, rwidth, rheight, raster,
ORIENTATION_BOTLEFT, stop);
}
static int
setorientation(TIFFRGBAImage* img)
{
switch (img->orientation) {
case ORIENTATION_TOPLEFT:
case ORIENTATION_LEFTTOP:
if (img->req_orientation == ORIENTATION_TOPRIGHT ||
img->req_orientation == ORIENTATION_RIGHTTOP)
return FLIP_HORIZONTALLY;
else if (img->req_orientation == ORIENTATION_BOTRIGHT ||
img->req_orientation == ORIENTATION_RIGHTBOT)
return FLIP_HORIZONTALLY | FLIP_VERTICALLY;
else if (img->req_orientation == ORIENTATION_BOTLEFT ||
img->req_orientation == ORIENTATION_LEFTBOT)
return FLIP_VERTICALLY;
else
return 0;
case ORIENTATION_TOPRIGHT:
case ORIENTATION_RIGHTTOP:
if (img->req_orientation == ORIENTATION_TOPLEFT ||
img->req_orientation == ORIENTATION_LEFTTOP)
return FLIP_HORIZONTALLY;
else if (img->req_orientation == ORIENTATION_BOTRIGHT ||
img->req_orientation == ORIENTATION_RIGHTBOT)
return FLIP_VERTICALLY;
else if (img->req_orientation == ORIENTATION_BOTLEFT ||
img->req_orientation == ORIENTATION_LEFTBOT)
return FLIP_HORIZONTALLY | FLIP_VERTICALLY;
else
return 0;
case ORIENTATION_BOTRIGHT:
case ORIENTATION_RIGHTBOT:
if (img->req_orientation == ORIENTATION_TOPLEFT ||
img->req_orientation == ORIENTATION_LEFTTOP)
return FLIP_HORIZONTALLY | FLIP_VERTICALLY;
else if (img->req_orientation == ORIENTATION_TOPRIGHT ||
img->req_orientation == ORIENTATION_RIGHTTOP)
return FLIP_VERTICALLY;
else if (img->req_orientation == ORIENTATION_BOTLEFT ||
img->req_orientation == ORIENTATION_LEFTBOT)
return FLIP_HORIZONTALLY;
else
return 0;
case ORIENTATION_BOTLEFT:
case ORIENTATION_LEFTBOT:
if (img->req_orientation == ORIENTATION_TOPLEFT ||
img->req_orientation == ORIENTATION_LEFTTOP)
return FLIP_VERTICALLY;
else if (img->req_orientation == ORIENTATION_TOPRIGHT ||
img->req_orientation == ORIENTATION_RIGHTTOP)
return FLIP_HORIZONTALLY | FLIP_VERTICALLY;
else if (img->req_orientation == ORIENTATION_BOTRIGHT ||
img->req_orientation == ORIENTATION_RIGHTBOT)
return FLIP_HORIZONTALLY;
else
return 0;
default: /* NOTREACHED */
return 0;
}
}
/*
* Get an tile-organized image that has
* PlanarConfiguration contiguous if SamplesPerPixel > 1
* or
* SamplesPerPixel == 1
*/
static int
gtTileContig(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
{
TIFF* tif = img->tif;
tileContigRoutine put = img->put.contig;
uint32 col, row, y, rowstoread;
tmsize_t pos;
uint32 tw, th;
unsigned char* buf;
int32 fromskew, toskew;
uint32 nrow;
int ret = 1, flip;
buf = (unsigned char*) _TIFFmalloc(TIFFTileSize(tif));
if (buf == 0) {
TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "%s", "No space for tile buffer");
return (0);
}
_TIFFmemset(buf, 0, TIFFTileSize(tif));
TIFFGetField(tif, TIFFTAG_TILEWIDTH, &tw);
TIFFGetField(tif, TIFFTAG_TILELENGTH, &th);
flip = setorientation(img);
if (flip & FLIP_VERTICALLY) {
y = h - 1;
toskew = -(int32)(tw + w);
}
else {
y = 0;
toskew = -(int32)(tw - w);
}
for (row = 0; row < h; row += nrow)
{
rowstoread = th - (row + img->row_offset) % th;
nrow = (row + rowstoread > h ? h - row : rowstoread);
for (col = 0; col < w; col += tw)
{
if (TIFFReadTile(tif, buf, col+img->col_offset,
row+img->row_offset, 0, 0)==(tmsize_t)(-1) && img->stoponerr)
{
ret = 0;
break;
}
pos = ((row+img->row_offset) % th) * TIFFTileRowSize(tif);
if (col + tw > w)
{
/*
* Tile is clipped horizontally. Calculate
* visible portion and skewing factors.
*/
uint32 npix = w - col;
fromskew = tw - npix;
(*put)(img, raster+y*w+col, col, y,
npix, nrow, fromskew, toskew + fromskew, buf + pos);
}
else
{
(*put)(img, raster+y*w+col, col, y, tw, nrow, 0, toskew, buf + pos);
}
}
y += (flip & FLIP_VERTICALLY ? -(int32) nrow : (int32) nrow);
}
_TIFFfree(buf);
if (flip & FLIP_HORIZONTALLY) {
uint32 line;
for (line = 0; line < h; line++) {
uint32 *left = raster + (line * w);
uint32 *right = left + w - 1;
while ( left < right ) {
uint32 temp = *left;
*left = *right;
*right = temp;
left++, right--;
}
}
}
return (ret);
}
/*
* Get an tile-organized image that has
* SamplesPerPixel > 1
* PlanarConfiguration separated
* We assume that all such images are RGB.
*/
static int
gtTileSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
{
TIFF* tif = img->tif;
tileSeparateRoutine put = img->put.separate;
uint32 col, row, y, rowstoread;
tmsize_t pos;
uint32 tw, th;
unsigned char* buf;
unsigned char* p0;
unsigned char* p1;
unsigned char* p2;
unsigned char* pa;
tmsize_t tilesize;
tmsize_t bufsize;
int32 fromskew, toskew;
int alpha = img->alpha;
uint32 nrow;
int ret = 1, flip;
int colorchannels;
tilesize = TIFFTileSize(tif);
bufsize = TIFFSafeMultiply(tmsize_t,alpha?4:3,tilesize);
if (bufsize == 0) {
TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "Integer overflow in %s", "gtTileSeparate");
return (0);
}
buf = (unsigned char*) _TIFFmalloc(bufsize);
if (buf == 0) {
TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "%s", "No space for tile buffer");
return (0);
}
_TIFFmemset(buf, 0, bufsize);
p0 = buf;
p1 = p0 + tilesize;
p2 = p1 + tilesize;
pa = (alpha?(p2+tilesize):NULL);
TIFFGetField(tif, TIFFTAG_TILEWIDTH, &tw);
TIFFGetField(tif, TIFFTAG_TILELENGTH, &th);
flip = setorientation(img);
if (flip & FLIP_VERTICALLY) {
y = h - 1;
toskew = -(int32)(tw + w);
}
else {
y = 0;
toskew = -(int32)(tw - w);
}
switch( img->photometric )
{
case PHOTOMETRIC_MINISWHITE:
case PHOTOMETRIC_MINISBLACK:
case PHOTOMETRIC_PALETTE:
colorchannels = 1;
p2 = p1 = p0;
break;
default:
colorchannels = 3;
break;
}
for (row = 0; row < h; row += nrow)
{
rowstoread = th - (row + img->row_offset) % th;
nrow = (row + rowstoread > h ? h - row : rowstoread);
for (col = 0; col < w; col += tw)
{
if (TIFFReadTile(tif, p0, col+img->col_offset,
row+img->row_offset,0,0)==(tmsize_t)(-1) && img->stoponerr)
{
ret = 0;
break;
}
if (colorchannels > 1
&& TIFFReadTile(tif, p1, col+img->col_offset,
row+img->row_offset,0,1) == (tmsize_t)(-1)
&& img->stoponerr)
{
ret = 0;
break;
}
if (colorchannels > 1
&& TIFFReadTile(tif, p2, col+img->col_offset,
row+img->row_offset,0,2) == (tmsize_t)(-1)
&& img->stoponerr)
{
ret = 0;
break;
}
if (alpha
&& TIFFReadTile(tif,pa,col+img->col_offset,
row+img->row_offset,0,colorchannels) == (tmsize_t)(-1)
&& img->stoponerr)
{
ret = 0;
break;
}
pos = ((row+img->row_offset) % th) * TIFFTileRowSize(tif);
if (col + tw > w)
{
/*
* Tile is clipped horizontally. Calculate
* visible portion and skewing factors.
*/
uint32 npix = w - col;
fromskew = tw - npix;
(*put)(img, raster+y*w+col, col, y,
npix, nrow, fromskew, toskew + fromskew,
p0 + pos, p1 + pos, p2 + pos, (alpha?(pa+pos):NULL));
} else {
(*put)(img, raster+y*w+col, col, y,
tw, nrow, 0, toskew, p0 + pos, p1 + pos, p2 + pos, (alpha?(pa+pos):NULL));
}
}
y += (flip & FLIP_VERTICALLY ?-(int32) nrow : (int32) nrow);
}
if (flip & FLIP_HORIZONTALLY) {
uint32 line;
for (line = 0; line < h; line++) {
uint32 *left = raster + (line * w);
uint32 *right = left + w - 1;
while ( left < right ) {
uint32 temp = *left;
*left = *right;
*right = temp;
left++, right--;
}
}
}
_TIFFfree(buf);
return (ret);
}
/*
* Get a strip-organized image that has
* PlanarConfiguration contiguous if SamplesPerPixel > 1
* or
* SamplesPerPixel == 1
*/
static int
gtStripContig(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
{
TIFF* tif = img->tif;
tileContigRoutine put = img->put.contig;
uint32 row, y, nrow, nrowsub, rowstoread;
tmsize_t pos;
unsigned char* buf;
uint32 rowsperstrip;
uint16 subsamplinghor,subsamplingver;
uint32 imagewidth = img->width;
tmsize_t scanline;
int32 fromskew, toskew;
int ret = 1, flip;
buf = (unsigned char*) _TIFFmalloc(TIFFStripSize(tif));
if (buf == 0) {
TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "No space for strip buffer");
return (0);
}
_TIFFmemset(buf, 0, TIFFStripSize(tif));
flip = setorientation(img);
if (flip & FLIP_VERTICALLY) {
y = h - 1;
toskew = -(int32)(w + w);
} else {
y = 0;
toskew = -(int32)(w - w);
}
TIFFGetFieldDefaulted(tif, TIFFTAG_ROWSPERSTRIP, &rowsperstrip);
TIFFGetFieldDefaulted(tif, TIFFTAG_YCBCRSUBSAMPLING, &subsamplinghor, &subsamplingver);
scanline = TIFFScanlineSize(tif);
fromskew = (w < imagewidth ? imagewidth - w : 0);
for (row = 0; row < h; row += nrow)
{
rowstoread = rowsperstrip - (row + img->row_offset) % rowsperstrip;
nrow = (row + rowstoread > h ? h - row : rowstoread);
nrowsub = nrow;
if ((nrowsub%subsamplingver)!=0)
nrowsub+=subsamplingver-nrowsub%subsamplingver;
if (TIFFReadEncodedStrip(tif,
TIFFComputeStrip(tif,row+img->row_offset, 0),
buf,
((row + img->row_offset)%rowsperstrip + nrowsub) * scanline)==(tmsize_t)(-1)
&& img->stoponerr)
{
ret = 0;
break;
}
pos = ((row + img->row_offset) % rowsperstrip) * scanline;
(*put)(img, raster+y*w, 0, y, w, nrow, fromskew, toskew, buf + pos);
y += (flip & FLIP_VERTICALLY ? -(int32) nrow : (int32) nrow);
}
if (flip & FLIP_HORIZONTALLY) {
uint32 line;
for (line = 0; line < h; line++) {
uint32 *left = raster + (line * w);
uint32 *right = left + w - 1;
while ( left < right ) {
uint32 temp = *left;
*left = *right;
*right = temp;
left++, right--;
}
}
}
_TIFFfree(buf);
return (ret);
}
/*
* Get a strip-organized image with
* SamplesPerPixel > 1
* PlanarConfiguration separated
* We assume that all such images are RGB.
*/
static int
gtStripSeparate(TIFFRGBAImage* img, uint32* raster, uint32 w, uint32 h)
{
TIFF* tif = img->tif;
tileSeparateRoutine put = img->put.separate;
unsigned char *buf;
unsigned char *p0, *p1, *p2, *pa;
uint32 row, y, nrow, rowstoread;
tmsize_t pos;
tmsize_t scanline;
uint32 rowsperstrip, offset_row;
uint32 imagewidth = img->width;
tmsize_t stripsize;
tmsize_t bufsize;
int32 fromskew, toskew;
int alpha = img->alpha;
int ret = 1, flip, colorchannels;
stripsize = TIFFStripSize(tif);
bufsize = TIFFSafeMultiply(tmsize_t,alpha?4:3,stripsize);
if (bufsize == 0) {
TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "Integer overflow in %s", "gtStripSeparate");
return (0);
}
p0 = buf = (unsigned char *)_TIFFmalloc(bufsize);
if (buf == 0) {
TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "No space for tile buffer");
return (0);
}
_TIFFmemset(buf, 0, bufsize);
p1 = p0 + stripsize;
p2 = p1 + stripsize;
pa = (alpha?(p2+stripsize):NULL);
flip = setorientation(img);
if (flip & FLIP_VERTICALLY) {
y = h - 1;
toskew = -(int32)(w + w);
}
else {
y = 0;
toskew = -(int32)(w - w);
}
switch( img->photometric )
{
case PHOTOMETRIC_MINISWHITE:
case PHOTOMETRIC_MINISBLACK:
case PHOTOMETRIC_PALETTE:
colorchannels = 1;
p2 = p1 = p0;
break;
default:
colorchannels = 3;
break;
}
TIFFGetFieldDefaulted(tif, TIFFTAG_ROWSPERSTRIP, &rowsperstrip);
scanline = TIFFScanlineSize(tif);
fromskew = (w < imagewidth ? imagewidth - w : 0);
for (row = 0; row < h; row += nrow)
{
rowstoread = rowsperstrip - (row + img->row_offset) % rowsperstrip;
nrow = (row + rowstoread > h ? h - row : rowstoread);
offset_row = row + img->row_offset;
if (TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, offset_row, 0),
p0, ((row + img->row_offset)%rowsperstrip + nrow) * scanline)==(tmsize_t)(-1)
&& img->stoponerr)
{
ret = 0;
break;
}
if (colorchannels > 1
&& TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, offset_row, 1),
p1, ((row + img->row_offset)%rowsperstrip + nrow) * scanline) == (tmsize_t)(-1)
&& img->stoponerr)
{
ret = 0;
break;
}
if (colorchannels > 1
&& TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, offset_row, 2),
p2, ((row + img->row_offset)%rowsperstrip + nrow) * scanline) == (tmsize_t)(-1)
&& img->stoponerr)
{
ret = 0;
break;