blob: 9a9717d76bc98ba24a14fcc0af9874a125114e48 [file] [log] [blame]
/*
* 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>
#include <limits.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);
}
if (td->td_sampleformat == SAMPLEFORMAT_IEEEFP) {
sprintf(emsg, "Sorry, can not handle images with IEEE floating-point samples");
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 meaningful
* 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);
}
if ( td->td_samplesperpixel != 3 || colorchannels != 3 ) {
sprintf(emsg,
"Sorry, can not handle image with %s=%d, %s=%d",
"Samples/pixel", td->td_samplesperpixel,
"colorchannels", colorchannels);
return 0;
}
break;
case PHOTOMETRIC_CIELAB:
if ( td->td_samplesperpixel != 3 || colorchannels != 3 || td->td_bitspersample != 8 ) {
sprintf(emsg,
"Sorry, can not handle image with %s=%d, %s=%d and %s=%d",
"Samples/pixel", td->td_samplesperpixel,
"colorchannels", colorchannels,
"Bits/sample", td->td_bitspersample);
return 0;
}
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;
if( !TIFFRGBAImageOK(tif, emsg) )
return 0;
/* Initialize to normal values */
img->row_offset = 0;
img->col_offset = 0;
img->redcmap = NULL;
img->greencmap = NULL;
img->bluecmap = NULL;
img->Map = NULL;
img->BWmap = NULL;
img->PALmap = NULL;
img->ycbcr = NULL;
img->cielab = NULL;
img->UaToAa = NULL;
img->Bitdepth16To8 = 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 = (1U << 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 through... */
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 meaningful
* 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;
}
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:
TIFFRGBAImageEnd( img );
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 = (uint16)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 = NULL;
int32 fromskew, toskew;
int64 safeskew;
uint32 nrow;
int ret = 1, flip;
uint32 this_tw, tocol;
int32 this_toskew, leftmost_toskew;
int32 leftmost_fromskew;
uint32 leftmost_tw;
tmsize_t bufsize;
bufsize = TIFFTileSize(tif);
if (bufsize == 0) {
TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "%s", "No space for tile buffer");
return (0);
}
TIFFGetField(tif, TIFFTAG_TILEWIDTH, &tw);
TIFFGetField(tif, TIFFTAG_TILELENGTH, &th);
flip = setorientation(img);
if (flip & FLIP_VERTICALLY) {
y = h - 1;
safeskew = 0;
safeskew -= tw;
safeskew -= w;
}
else {
y = 0;
safeskew = 0;
safeskew -= tw;
safeskew +=w;
}
if(safeskew > INT_MAX || safeskew < INT_MIN){
_TIFFfree(buf);
TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "%s", "Invalid skew");
return (0);
}
toskew = safeskew;
/*
* Leftmost tile is clipped on left side if col_offset > 0.
*/
leftmost_fromskew = img->col_offset % tw;
leftmost_tw = tw - leftmost_fromskew;
safeskew = toskew;
safeskew += leftmost_fromskew;
if(safeskew > INT_MAX || safeskew < INT_MIN){
_TIFFfree(buf);
TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "%s", "Invalid skew");
return (0);
}
leftmost_toskew = safeskew;
for (row = 0; ret != 0 && row < h; row += nrow)
{
rowstoread = th - (row + img->row_offset) % th;
nrow = (row + rowstoread > h ? h - row : rowstoread);
fromskew = leftmost_fromskew;
this_tw = leftmost_tw;
this_toskew = leftmost_toskew;
tocol = 0;
col = img->col_offset;
while (tocol < w)
{
if (_TIFFReadTileAndAllocBuffer(tif, (void**) &buf, bufsize, col,
row+img->row_offset, 0, 0)==(tmsize_t)(-1) &&
(buf == NULL || img->stoponerr))
{
ret = 0;
break;
}
pos = ((row+img->row_offset) % th) * TIFFTileRowSize(tif) + \
((tmsize_t) fromskew * img->samplesperpixel);
if (tocol + this_tw > w)
{
/*
* Rightmost tile is clipped on right side.
*/
safeskew = tw;
safeskew -= w;
safeskew += tocol;
if(safeskew > INT_MAX || safeskew < INT_MIN){
_TIFFfree(buf);
TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "%s", "Invalid skew");
return (0);
}
fromskew = safeskew;
this_tw = tw - fromskew;
safeskew = toskew;
safeskew += fromskew;
if(safeskew > INT_MAX || safeskew < INT_MIN){
_TIFFfree(buf);
TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "%s", "Invalid skew");
return (0);
}
this_toskew = safeskew;
}
(*put)(img, raster+y*w+tocol, tocol, y, this_tw, nrow, fromskew, this_toskew, buf + pos);
tocol += this_tw;
col += this_tw;
/*
* After the leftmost tile, tiles are no longer clipped on left side.
*/
fromskew = 0;
this_tw = tw;
this_toskew = toskew;
}
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 = NULL;
unsigned char* p0 = NULL;
unsigned char* p1 = NULL;
unsigned char* p2 = NULL;
unsigned char* pa = NULL;
tmsize_t tilesize;
tmsize_t bufsize;
int32 fromskew, toskew;
int alpha = img->alpha;
uint32 nrow;
int ret = 1, flip;
uint16 colorchannels;
uint32 this_tw, tocol;
int32 this_toskew, leftmost_toskew;
int32 leftmost_fromskew;
uint32 leftmost_tw;
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);
}
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;
break;
default:
colorchannels = 3;
break;
}
/*
* Leftmost tile is clipped on left side if col_offset > 0.
*/
leftmost_fromskew = img->col_offset % tw;
leftmost_tw = tw - leftmost_fromskew;
leftmost_toskew = toskew + leftmost_fromskew;
for (row = 0; ret != 0 && row < h; row += nrow)
{
rowstoread = th - (row + img->row_offset) % th;
nrow = (row + rowstoread > h ? h - row : rowstoread);
fromskew = leftmost_fromskew;
this_tw = leftmost_tw;
this_toskew = leftmost_toskew;
tocol = 0;
col = img->col_offset;
while (tocol < w)
{
if( buf == NULL )
{
if (_TIFFReadTileAndAllocBuffer(
tif, (void**) &buf, bufsize, col,
row+img->row_offset,0,0)==(tmsize_t)(-1)
&& (buf == NULL || img->stoponerr))
{
ret = 0;
break;
}
p0 = buf;
if( colorchannels == 1 )
{
p2 = p1 = p0;
pa = (alpha?(p0+3*tilesize):NULL);
}
else
{
p1 = p0 + tilesize;
p2 = p1 + tilesize;
pa = (alpha?(p2+tilesize):NULL);
}
}
else if (TIFFReadTile(tif, p0, col,
row+img->row_offset,0,0)==(tmsize_t)(-1) && img->stoponerr)
{
ret = 0;
break;
}
if (colorchannels > 1
&& TIFFReadTile(tif, p1, col,
row+img->row_offset,0,1) == (tmsize_t)(-1)
&& img->stoponerr)
{
ret = 0;
break;
}
if (colorchannels > 1
&& TIFFReadTile(tif, p2, col,
row+img->row_offset,0,2) == (tmsize_t)(-1)
&& img->stoponerr)
{
ret = 0;
break;
}
if (alpha
&& TIFFReadTile(tif,pa,col,
row+img->row_offset,0,colorchannels) == (tmsize_t)(-1)
&& img->stoponerr)
{
ret = 0;
break;
}
pos = ((row+img->row_offset) % th) * TIFFTileRowSize(tif) + \
((tmsize_t) fromskew * img->samplesperpixel);
if (tocol + this_tw > w)
{
/*
* Rightmost tile is clipped on right side.
*/
fromskew = tw - (w - tocol);
this_tw = tw - fromskew;
this_toskew = toskew + fromskew;
}
(*put)(img, raster+y*w+tocol, tocol, y, this_tw, nrow, fromskew, this_toskew, \
p0 + pos, p1 + pos, p2 + pos, (alpha?(pa+pos):NULL));
tocol += this_tw;
col += this_tw;
/*
* After the leftmost tile, tiles are no longer clipped on left side.
*/
fromskew = 0;
this_tw = tw;
this_toskew = toskew;
}
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 = NULL;
uint32 rowsperstrip;
uint16 subsamplinghor,subsamplingver;
uint32 imagewidth = img->width;
tmsize_t scanline;
int32 fromskew, toskew;
int ret = 1, flip;
tmsize_t maxstripsize;
if ((tmsize_t)img->row_offset > TIFF_SSIZE_T_MAX || (size_t)h > (size_t)TIFF_SSIZE_T_MAX)
return (0);
TIFFGetFieldDefaulted(tif, TIFFTAG_YCBCRSUBSAMPLING, &subsamplinghor, &subsamplingver);
if( subsamplingver == 0 ) {
TIFFErrorExt(tif->tif_clientdata, TIFFFileName(tif), "Invalid vertical YCbCr subsampling");
return (0);
}
maxstripsize = 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);
scanline = TIFFScanlineSize(tif);
fromskew = (w < imagewidth ? imagewidth - w : 0);
for (row = 0; row < h; row += nrow)
{
tmsize_t actual_row;
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 (row > (size_t)TIFF_SSIZE_T_MAX - img->row_offset) {
ret = 0;
break;
}
actual_row = row + img->row_offset;
actual_row %= rowsperstrip;
if ((size_t)nrowsub > (size_t)TIFF_SSIZE_T_MAX || (size_t)actual_row > (size_t)TIFF_SSIZE_T_MAX - nrowsub) {
ret = 0;
break;
}
actual_row += nrowsub;
if ((tmsize_t)actual_row > TIFF_SSIZE_T_MAX / scanline) {
ret = 0;
break;
}
if (_TIFFReadEncodedStripAndAllocBuffer(tif,
TIFFComputeStrip(tif,row+img->row_offset, 0),
(void**)(&buf),
maxstripsize,
actual_row * scanline)==(tmsize_t)(-1)
&& (buf == NULL || img->stoponerr))
{
ret = 0;
break;
}
pos = ((row + img->row_offset) % rowsperstrip) * scanline + \
((tmsize_t) img->col_offset * img->samplesperpixel);
(*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 = NULL;
unsigned char *p0 = NULL, *p1 = NULL, *p2 = NULL, *pa = NULL;
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;
uint16 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);
}
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;
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( buf == NULL )
{
if (_TIFFReadEncodedStripAndAllocBuffer(
tif, TIFFComputeStrip(tif, offset_row, 0),
(void**) &buf, bufsize,
((row + img->row_offset)%rowsperstrip + nrow) * scanline)==(tmsize_t)(-1)
&& (buf == NULL || img->stoponerr))
{
ret = 0;
break;
}
p0 = buf;
if( colorchannels == 1 )
{
p2 = p1 = p0;
pa = (alpha?(p0+3*stripsize):NULL);
}
else
{
p1 = p0 + stripsize;
p2 = p1 + stripsize;
pa = (alpha?(p2+stripsize):NULL);
}
}
else 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;
}
if (alpha)
{
if (TIFFReadEncodedStrip(tif, TIFFComputeStrip(tif, offset_row, colorchannels),
pa, ((row + img->row_offset)%rowsperstrip + nrow) * scanline)==(tmsize_t)(-1)
&& img->stoponerr)
{
ret = 0;
break;
}
}
pos = ((row + img->row_offset) % rowsperstrip) * scanline + \
((tmsize_t) img->col_offset * img->samplesperpixel);
(*put)(img, raster+y*w, 0, y, w, nrow, fromskew, 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);
}
/*
* The following routines move decoded data returned
* from the TIFF library into rasters filled with packed
* ABGR pixels (i.e. suitable for passing to lrecwrite.)
*
* The routines have been created according to the most
* important cases and optimized. PickContigCase and
* PickSeparateCase analyze the parameters and select
* the appropriate "get" and "put" routine to use.
*/
#define REPEAT8(op) REPEAT4(op); REPEAT4(op)
#define REPEAT4(op) REPEAT2(op); REPEAT2(op)
#define REPEAT2(op) op; op
#define CASE8(x,op) \
switch (x) { \
case 7: op; /*-fallthrough*/ \
case 6: op; /*-fallthrough*/ \
case 5: op; /*-fallthrough*/ \
case 4: op; /*-fallthrough*/ \
case 3: op; /*-fallthrough*/ \
case 2: op; /*-fallthrough*/ \
case 1: op; \
}
#define CASE4(x,op) switch (x) { case 3: op; /*-fallthrough*/ case 2: op; /*-fallthrough*/ case 1: op; }
#define NOP
#define UNROLL8(w, op1, op2) { \
uint32 _x; \
for (_x = w; _x >= 8; _x -= 8) { \
op1; \
REPEAT8(op2); \
} \
if (_x > 0) { \
op1; \
CASE8(_x,op2); \
} \
}
#define UNROLL4(w, op1, op2) { \
uint32 _x; \
for (_x = w; _x >= 4; _x -= 4) { \
op1; \
REPEAT4(op2); \
} \
if (_x > 0) { \
op1; \
CASE4(_x,op2); \
} \
}
#define UNROLL2(w, op1, op2) { \
uint32 _x; \
for (_x = w; _x >= 2; _x -= 2) { \
op1; \
REPEAT2(op2); \
} \
if (_x) { \
op1; \
op2; \
} \
}
#define SKEW(r,g,b,skew) { r += skew; g += skew; b += skew; }
#define SKEW4(r,g,b,a,skew) { r += skew; g += skew; b += skew; a+= skew; }
#define A1 (((uint32)0xffL)<<24)
#define PACK(r,g,b) \
((uint32)(r)|((uint32)(g)<<8)|((uint32)(b)<<16)|A1)
#define PACK4(r,g,b,a) \
((uint32)(r)|((uint32)(g)<<8)|((uint32)(b)<<16)|((uint32)(a)<<24))
#define W2B(v) (((v)>>8)&0xff)
/* TODO: PACKW should have be made redundant in favor of Bitdepth16To8 LUT */
#define PACKW(r,g,b) \
((uint32)W2B(r)|((uint32)W2B(g)<<8)|((uint32)W2B(b)<<16)|A1)
#define PACKW4(r,g,b,a) \
((uint32)W2B(r)|((uint32)W2B(g)<<8)|((uint32)W2B(b)<<16)|((uint32)W2B(a)<<24))
#define DECLAREContigPutFunc(name) \
static void name(\
TIFFRGBAImage* img, \
uint32* cp, \
uint32 x, uint32 y, \
uint32 w, uint32 h, \
int32 fromskew, int32 toskew, \
unsigned char* pp \
)
/*
* 8-bit palette => colormap/RGB
*/
DECLAREContigPutFunc(put8bitcmaptile)
{
uint32** PALmap = img->PALmap;
int samplesperpixel = img->samplesperpixel;
(void) y;
for( ; h > 0; --h) {
for (x = w; x > 0; --x)
{
*cp++ = PALmap[*pp][0];
pp += samplesperpixel;
}
cp += toskew;
pp += fromskew;
}
}
/*
* 4-bit palette => colormap/RGB
*/
DECLAREContigPutFunc(put4bitcmaptile)
{
uint32** PALmap = img->PALmap;
(void) x; (void) y;
fromskew /= 2;
for( ; h > 0; --h) {
uint32* bw;
UNROLL2(w, bw = PALmap[*pp++], *cp++ = *bw++);
cp += toskew;
pp += fromskew;
}
}
/*
* 2-bit palette => colormap/RGB
*/
DECLAREContigPutFunc(put2bitcmaptile)
{
uint32** PALmap = img->PALmap;
(void) x; (void) y;
fromskew /= 4;
for( ; h > 0; --h) {
uint32* bw;
UNROLL4(w, bw = PALmap[*pp++], *cp++ = *bw++);
cp += toskew;
pp += fromskew;
}
}
/*
* 1-bit palette => colormap/RGB
*/
DECLAREContigPutFunc(put1bitcmaptile)
{
uint32** PALmap = img->PALmap;
(void) x; (void) y;
fromskew /= 8;
for( ; h > 0; --h) {
uint32* bw;
UNROLL8(w, bw = PALmap[*pp++], *cp++ = *bw++);
cp += toskew;
pp += fromskew;
}
}
/*
* 8-bit greyscale => colormap/RGB
*/
DECLAREContigPutFunc(putgreytile)
{
int samplesperpixel = img->samplesperpixel;
uint32** BWmap = img->BWmap;
(void) y;
for( ; h > 0; --h) {
for (x = w; x > 0; --x)
{
*cp++ = BWmap[*pp][0];
pp += samplesperpixel;
}
cp += toskew;
pp += fromskew;
}
}
/*
* 8-bit greyscale with associated alpha => colormap/RGBA
*/
DECLAREContigPutFunc(putagreytile)
{
int samplesperpixel = img->samplesperpixel;
uint32** BWmap = img->BWmap;
(void) y;
for( ; h > 0; --h) {
for (x = w; x > 0; --x)
{
*cp++ = BWmap[*pp][0] & ((uint32)*(pp+1) << 24 | ~A1);
pp += samplesperpixel;
}
cp += toskew;
pp += fromskew;
}
}
/*
* 16-bit greyscale => colormap/RGB
*/
DECLAREContigPutFunc(put16bitbwtile)
{
int samplesperpixel = img->samplesperpixel;
uint32** BWmap = img->BWmap;
(void) y;
for( ; h > 0; --h) {
uint16 *wp = (uint16 *) pp;
for (x = w; x > 0; --x)
{
/* use high order byte of 16bit value */
*cp++ = BWmap[*wp >> 8][0];
pp += 2 * samplesperpixel;
wp += samplesperpixel;
}
cp += toskew;
pp += fromskew;
}
}
/*
* 1-bit bilevel => colormap/RGB
*/
DECLAREContigPutFunc(put1bitbwtile)
{
uint32** BWmap = img->BWmap;
(void) x; (void) y;
fromskew /= 8;
for( ; h > 0; --h) {
uint32* bw;
UNROLL8(w, bw = BWmap[*pp++], *cp++ = *bw++);
cp += toskew;
pp += fromskew;
}
}
/*
* 2-bit greyscale => colormap/RGB
*/
DECLAREContigPutFunc(put2bitbwtile)
{
uint32** BWmap = img->BWmap;
(void) x; (void) y;
fromskew /= 4;
for( ; h > 0; --h) {
uint32* bw;
UNROLL4(w, bw = BWmap[*pp++], *cp++ = *bw++);
cp += toskew;
pp += fromskew;
}
}
/*
* 4-bit greyscale => colormap/RGB
*/
DECLAREContigPutFunc(put4bitbwtile)
{
uint32** BWmap = img->BWmap;
(void) x; (void) y;
fromskew /= 2;
for( ; h > 0; --h) {
uint32* bw;
UNROLL2(w, bw = BWmap[*pp++], *cp++ = *bw++);
cp += toskew;
pp += fromskew;
}
}
/*
* 8-bit packed samples, no Map => RGB
*/
DECLAREContigPutFunc(putRGBcontig8bittile)
{
int samplesperpixel = img->samplesperpixel;
(void) x; (void) y;
fromskew *= samplesperpixel;
for( ; h > 0; --h) {
UNROLL8(w, NOP,
*cp++ = PACK(pp[0], pp[1], pp[2]);
pp += samplesperpixel);
cp += toskew;
pp += fromskew;
}
}
/*
* 8-bit packed samples => RGBA w/ associated alpha
* (known to have Map == NULL)
*/
DECLAREContigPutFunc(putRGBAAcontig8bittile)
{
int samplesperpixel = img->samplesperpixel;
(void) x; (void) y;
fromskew *= samplesperpixel;
for( ; h > 0; --h) {
UNROLL8(w, NOP,
*cp++ = PACK4(pp[0], pp[1], pp[2], pp[3]);
pp += samplesperpixel);
cp += toskew;
pp += fromskew;
}
}
/*
* 8-bit packed samples => RGBA w/ unassociated alpha
* (known to have Map == NULL)
*/
DECLAREContigPutFunc(putRGBUAcontig8bittile)
{
int samplesperpixel = img->samplesperpixel;
(void) y;
fromskew *= samplesperpixel;
for( ; h > 0; --h) {
uint32 r, g, b, a;
uint8* m;
for (x = w; x > 0; --x) {
a = pp[3];
m = img->UaToAa+((size_t) a<<8);
r = m[pp[0]];
g = m[pp[1]];
b = m[pp[2]];
*cp++ = PACK4(r,g,b,a);
pp += samplesperpixel;
}
cp += toskew;
pp += fromskew;
}
}
/*
* 16-bit packed samples => RGB
*/
DECLAREContigPutFunc(putRGBcontig16bittile)
{
int samplesperpixel = img->samplesperpixel;
uint16 *wp = (uint16 *)pp;
(void) y;
fromskew *= samplesperpixel;
for( ; h > 0; --h) {
for (x = w; x > 0; --x) {
*cp++ = PACK(img->Bitdepth16To8[wp[0]],
img->Bitdepth16To8[wp[1]],
img->Bitdepth16To8[wp[2]]);
wp += samplesperpixel;
}
cp += toskew;
wp += fromskew;
}
}
/*
* 16-bit packed samples => RGBA w/ associated alpha
* (known to have Map == NULL)
*/
DECLAREContigPutFunc(putRGBAAcontig16bittile)
{
int samplesperpixel = img->samplesperpixel;
uint16 *wp = (uint16 *)pp;
(void) y;
fromskew *= samplesperpixel;
for( ; h > 0; --h) {
for (x = w; x > 0; --x) {
*cp++ = PACK4(img->Bitdepth16To8[wp[0]],
img->Bitdepth16To8[wp[1]],
img->Bitdepth16To8[wp[2]],
img->Bitdepth16To8[wp[3]]);
wp += samplesperpixel;
}
cp += toskew;
wp += fromskew;
}
}
/*
* 16-bit packed samples => RGBA w/ unassociated alpha
* (known to have Map == NULL)
*/
DECLAREContigPutFunc(putRGBUAcontig16bittile)
{
int samplesperpixel = img->samplesperpixel;
uint16 *wp = (uint16 *)pp;
(void) y;
fromskew *= samplesperpixel;
for( ; h > 0; --h) {
uint32 r,g,b,a;
uint8* m;
for (x = w; x > 0; --x) {
a = img->Bitdepth16To8[wp[3]];
m = img->UaToAa+((size_t) a<<8);
r = m[img->Bitdepth16To8[wp[0]]];
g = m[img->Bitdepth16To8[wp[1]]];
b = m[img->Bitdepth16To8[wp[2]]];
*cp++ = PACK4(r,g,b,a);
wp += samplesperpixel;
}
cp += toskew;
wp += fromskew;
}
}
/*
* 8-bit packed CMYK samples w/o Map => RGB
*
* NB: The conversion of CMYK->RGB is *very* crude.
*/
DECLAREContigPutFunc(putRGBcontig8bitCMYKtile)
{
int samplesperpixel = img->samplesperpixel;
uint16 r, g, b, k;
(void) x; (void) y;
fromskew *= samplesperpixel;
for( ; h > 0; --h) {
UNROLL8(w, NOP,
k = 255 - pp[3];
r = (k*(255-pp[0]))/255;
g = (k*(255-pp[1]))/255;
b = (k*(255-pp[2]))/255;
*cp++ = PACK(r, g, b);
pp += samplesperpixel);
cp += toskew;
pp += fromskew;
}
}
/*
* 8-bit packed CMYK samples w/Map => RGB
*
* NB: The conversion of CMYK->RGB is *very* crude.
*/
DECLAREContigPutFunc(putRGBcontig8bitCMYKMaptile)
{
int samplesperpixel = img->samplesperpixel;
TIFFRGBValue* Map = img->Map;
uint16 r, g, b, k;
(void) y;
fromskew *= samplesperpixel;
for( ; h > 0; --h) {
for (x = w; x > 0; --x) {
k = 255 - pp[3];
r = (k*(255-pp[0]))/255;
g = (k*(255-pp[1]))/255;
b = (k*(255-pp[2]))/255;
*cp++ = PACK(Map[r], Map[g], Map[b]);
pp += samplesperpixel;
}
pp += fromskew;
cp += toskew;
}
}
#define DECLARESepPutFunc(name) \
static void name(\
TIFFRGBAImage* img,\
uint32* cp,\
uint32 x, uint32 y, \
uint32 w, uint32 h,\
int32 fromskew, int32 toskew,\
unsigned char* r, unsigned char* g, unsigned char* b, unsigned char* a\
)
/*
* 8-bit unpacked samples => RGB
*/
DECLARESepPutFunc(putRGBseparate8bittile)
{
(void) img; (void) x; (void) y; (void) a;
for( ; h > 0; --h) {
UNROLL8(w, NOP, *cp++ = PACK(*r++, *g++, *b++));
SKEW(r, g, b, fromskew);
cp += toskew;
}
}
/*
* 8-bit unpacked samples => RGBA w/ associated alpha
*/
DECLARESepPutFunc(putRGBAAseparate8bittile)
{
(void) img; (void) x; (void) y;
for( ; h > 0; --h) {
UNROLL8(w, NOP, *cp++ = PACK4(*r++, *g++, *b++, *a++));
SKEW4(r, g, b, a, fromskew);
cp += toskew;
}
}
/*
* 8-bit unpacked CMYK samples => RGBA
*/
DECLARESepPutFunc(putCMYKseparate8bittile)
{
(void) img; (void) y;
for( ; h > 0; --h) {
uint32 rv, gv, bv, kv;
for (x = w; x > 0; --x) {
kv = 255 - *a++;
rv = (kv*(255-*r++))/255;
gv = (kv*(255-*g++))/255;
bv = (kv*(255-*b++))/255;
*cp++ = PACK4(rv,gv,bv,255);
}
SKEW4(r, g, b, a, fromskew);
cp += toskew;
}
}
/*
* 8-bit unpacked samples => RGBA w/ unassociated alpha
*/
DECLARESepPutFunc(putRGBUAseparate8bittile)
{
(void) img; (void) y;
for( ; h > 0; --h) {
uint32 rv, gv, bv, av;
uint8* m;
for (x = w; x > 0; --x) {
av = *a++;
m = img->UaToAa+((size_t) av<<8);
rv = m[*r++];
gv = m[*g++];
bv = m[*b++];
*cp++ = PACK4(rv,gv,bv,av);
}
SKEW4(r, g, b, a, fromskew);
cp += toskew;
}
}
/*
* 16-bit unpacked samples => RGB
*/
DECLARESepPutFunc(putRGBseparate16bittile)
{
uint16 *wr = (uint16*) r;
uint16 *wg = (uint16*) g;
uint16 *wb = (uint16*) b;
(void) img; (void) y; (void) a;
for( ; h > 0; --h) {
for (x = 0; x < w; x++)
*cp++ = PACK(img->Bitdepth16To8[*wr++],
img->Bitdepth16To8[*wg++],
img->Bitdepth16To8[*wb++]);
SKEW(wr, wg, wb, fromskew);
cp += toskew;
}
}
/*
* 16-bit unpacked samples => RGBA w/ associated alpha
*/
DECLARESepPutFunc(putRGBAAseparate16bittile)
{
uint16 *wr = (uint16*) r;
uint16 *wg = (uint16*) g;
uint16 *wb = (uint16*) b;
uint16 *wa = (uint16*) a;
(void) img; (void) y;
for( ; h > 0; --h) {
for (x = 0; x < w; x++)
*cp++ = PACK4(img->Bitdepth16To8[*wr++],
img->Bitdepth16To8[*wg++],
img->Bitdepth16To8[*wb++],
img->Bitdepth16To8[*wa++]);
SKEW4(wr, wg, wb, wa, fromskew);
cp += toskew;
}
}
/*
* 16-bit unpacked samples => RGBA w/ unassociated alpha
*/
DECLARESepPutFunc(putRGBUAseparate16bittile)
{
uint16 *wr = (uint16*) r;
uint16 *wg = (uint16*) g;
uint16 *wb = (uint16*) b;
uint16 *wa = (uint16*) a;
(void) img; (void) y;
for( ; h > 0; --h) {
uint32 r2,g2,b2,a2;
uint8* m;
for (x = w; x > 0; --x) {
a2 = img->Bitdepth16To8[*wa++];
m = img->UaToAa+((size_t) a2<<8);
r2 = m[img->Bitdepth16To8[*wr++]];
g2 = m[img->Bitdepth16To8[*wg++]];
b2 = m[img->Bitdepth16To8[*wb++]];
*cp++ = PACK4(r2,g2,b2,a2);
}
SKEW4(wr, wg, wb, wa, fromskew);
cp += toskew;
}
}
/*
* 8-bit packed CIE L*a*b 1976 samples => RGB
*/
DECLAREContigPutFunc(putcontig8bitCIELab)
{
float X, Y, Z;
uint32 r, g, b;
(void) y;
fromskew *= 3;
for( ; h > 0; --h) {
for (x = w; x > 0; --x) {
TIFFCIELabToXYZ(img->cielab,
(unsigned char)pp[0],
(signed char)pp[1],
(signed char)pp[2],
&X, &Y, &Z);
TIFFXYZToRGB(img->cielab, X, Y, Z, &r, &g, &b);
*cp++ = PACK(r, g, b);
pp += 3;
}
cp += toskew;
pp += fromskew;
}
}
/*
* YCbCr -> RGB conversion and packing routines.
*/
#define YCbCrtoRGB(dst, Y) { \
uint32 r, g, b; \
TIFFYCbCrtoRGB(img->ycbcr, (Y), Cb, Cr, &r, &g, &b); \
dst = PACK(r, g, b); \
}
/*
* 8-bit packed YCbCr samples => RGB
* This function is generic for different sampling sizes,
* and can handle blocks sizes that aren't multiples of the
* sampling size. However, it is substantially less optimized
* than the specific sampling cases. It is used as a fallback
* for difficult blocks.
*/
#ifdef notdef
static void putcontig8bitYCbCrGenericTile(
TIFFRGBAImage* img,
uint32* cp,
uint32 x, uint32 y,
uint32 w, uint32 h,
int32 fromskew, int32 toskew,
unsigned char* pp,
int h_group,
int v_group )
{
uint32* cp1 = cp+w+toskew;
uint32* cp2 = cp1+w+toskew;
uint32* cp3 = cp2+w+toskew;
int32 incr = 3*w+4*toskew;
int32 Cb, Cr;
int group_size = v_group * h_group + 2;
(void) y;
fromskew = (fromskew * group_size) / h_group;
for( yy = 0; yy < h; yy++ )
{
unsigned char *pp_line;
int y_line_group = yy / v_group;
int y_remainder = yy - y_line_group * v_group;
pp_line = pp + v_line_group *
for( xx = 0; xx < w; xx++ )
{
Cb = pp
}
}
for (; h >= 4; h -= 4) {
x = w>>2;
do {
Cb = pp[16];
Cr = pp[17];
YCbCrtoRGB(cp [0], pp[ 0]);
YCbCrtoRGB(cp [1], pp[ 1]);
YCbCrtoRGB(cp [2], pp[ 2]);
YCbCrtoRGB(cp [3], pp[ 3]);
YCbCrtoRGB(cp1[0], pp[ 4]);
YCbCrtoRGB(cp1[1], pp[ 5]);
YCbCrtoRGB(cp1[2], pp[ 6]);
YCbCrtoRGB(cp1[3], pp[ 7]);
YCbCrtoRGB(cp2[0], pp[ 8]);
YCbCrtoRGB(cp2[1], pp[ 9]);
YCbCrtoRGB(cp2[2], pp[10]);
YCbCrtoRGB(cp2[3], pp[11]);
YCbCrtoRGB(cp3[0], pp[12]);
YCbCrtoRGB(cp3[1], pp[13]);
YCbCrtoRGB(cp3[2], pp[14]);
YCbCrtoRGB(cp3[3], pp[15]);
cp += 4, cp1 += 4, cp2 += 4, cp3 += 4;
pp += 18;
} while (--x);
cp += incr, cp1 += incr, cp2 += incr, cp3 += incr;
pp += fromskew;
}
}
#endif
/*
* 8-bit packed YCbCr samples w/ 4,4 subsampling => RGB
*/
DECLAREContigPutFunc(putcontig8bitYCbCr44tile)
{
uint32* cp1 = cp+w+toskew;
uint32* cp2 = cp1+w+toskew;
uint32* cp3 = cp2+w+toskew;
int32 incr = 3*w+4*toskew;
(void) y;
/* adjust fromskew */
fromskew = (fromskew / 4) * (4*2+2);
if ((h & 3) == 0 && (w & 3) == 0) {
for (; h >= 4; h -= 4) {
x = w>>2;
do {
int32 Cb = pp[16];
int32 Cr = pp[17];
YCbCrtoRGB(cp [0], pp[ 0]);
YCbCrtoRGB(cp [1], pp[ 1]);
YCbCrtoRGB(cp [2], pp[ 2]);
YCbCrtoRGB(cp [3], pp[ 3]);
YCbCrtoRGB(cp1[0], pp[ 4]);
YCbCrtoRGB(cp1[1], pp[ 5]);
YCbCrtoRGB(cp1[2], pp[ 6]);
YCbCrtoRGB(cp1[3], pp[ 7]);
YCbCrtoRGB(cp2[0], pp[ 8]);
YCbCrtoRGB(cp2[1], pp[ 9]);
YCbCrtoRGB(cp2[2], pp[10]);
YCbCrtoRGB(cp2[3], pp[11]);
YCbCrtoRGB(cp3[0], pp[12]);
YCbCrtoRGB(cp3[1], pp[13]);
YCbCrtoRGB(cp3[2], pp[14]);
YCbCrtoRGB(cp3[3], pp[15]);
cp += 4;
cp1 += 4;
cp2 += 4;
cp3 += 4;
pp += 18;
} while (--x);
cp += incr;
cp1 += incr;
cp2 += incr;
cp3 += incr;
pp += fromskew;
}
} else {
while (h > 0) {
for (x = w; x > 0;) {
int32 Cb = pp[16];
int32 Cr = pp[17];
switch (x) {
default:
switch (h) {
default: YCbCrtoRGB(cp3[3], pp[15]); /* FALLTHROUGH */
case 3: YCbCrtoRGB(cp2[3], pp[11]); /* FALLTHROUGH */
case 2: YCbCrtoRGB(cp1[3], pp[ 7]); /* FALLTHROUGH */
case 1: YCbCrtoRGB(cp [3], pp[ 3]); /* FALLTHROUGH */
} /* FALLTHROUGH */
case 3:
switch (h) {
default: YCbCrtoRGB(cp3[2], pp[14]); /* FALLTHROUGH */
case 3: YCbCrtoRGB(cp2[2], pp[10]); /* FALLTHROUGH */
case 2: YCbCrtoRGB(cp1[2], pp[ 6]); /* FALLTHROUGH */
case 1: YCbCrtoRGB(cp [2], pp[ 2]); /* FALLTHROUGH */
} /* FALLTHROUGH */
case 2:
switch (h) {
default: YCbCrtoRGB(cp3[1], pp[13]); /* FALLTHROUGH */
case 3: YCbCrtoRGB(cp2[1], pp[ 9]); /* FALLTHROUGH */
case 2: YCbCrtoRGB(cp1[1], pp[ 5]); /* FALLTHROUGH */
case 1: YCbCrtoRGB(cp [1], pp[ 1]); /* FALLTHROUGH */
} /* FALLTHROUGH */
case 1:
switch (h) {
default: YCbCrtoRGB(cp3[0], pp[12]); /* FALLTHROUGH */
case 3: YCbCrtoRGB(cp2[0], pp[ 8]); /* FALLTHROUGH */
case 2: YCbCrtoRGB(cp1[0], pp[ 4]); /* FALLTHROUGH */
case 1: YCbCrtoRGB(cp [0], pp[ 0]); /* FALLTHROUGH */
} /* FALLTHROUGH */
}
if (x < 4) {
cp += x; cp1 += x; cp2 += x; cp3 += x;
x = 0;
}
else {
cp += 4; cp1 += 4; cp2 += 4; cp3 += 4;
x -= 4;
}
pp += 18;
}
if (h <= 4)
break;
h -= 4;
cp += incr;
cp1 += incr;
cp2 += incr;
cp3 += incr;
pp += fromskew;
}
}
}
/*
* 8-bit packed YCbCr samples w/ 4,2 subsampling => RGB
*/
DECLAREContigPutFunc(putcontig8bitYCbCr42tile)
{
uint32* cp1 = cp+w+toskew;
int32 incr = 2*toskew+w;
(void) y;
fromskew = (fromskew / 4) * (4*2+2);
if ((w & 3) == 0 && (h & 1) == 0) {
for (; h >= 2; h -= 2) {
x = w>>2;
do {
int32 Cb = pp[8];
int32 Cr = pp[9];
YCbCrtoRGB(cp [0], pp[0]);
YCbCrtoRGB(cp [1], pp[1]);
YCbCrtoRGB(cp [2], pp[2]);
YCbCrtoRGB(cp [3], pp[3]);
YCbCrtoRGB(cp1[0], pp[4]);
YCbCrtoRGB(cp1[1], pp[5]);
YCbCrtoRGB(cp1[2], pp[6]);
YCbCrtoRGB(cp1[3], pp[7]);
cp += 4;
cp1 += 4;
pp += 10;
} while (--x);
cp += incr;
cp1 += incr;
pp += fromskew;
}
} else {
while (h > 0) {
for (x = w; x > 0;) {
int32 Cb = pp[8];
int32 Cr = pp[9];
switch (x) {
default:
switch (h) {
default: YCbCrtoRGB(cp1[3], pp[ 7]); /* FALLTHROUGH */
case 1: YCbCrtoRGB(cp [3], pp[ 3]); /* FALLTHROUGH */
} /* FALLTHROUGH */
case 3:
switch (h) {
default: YCbCrtoRGB(cp1[2], pp[ 6]); /* FALLTHROUGH */
case 1: YCbCrtoRGB(cp [2], pp[ 2]); /* FALLTHROUGH */
} /* FALLTHROUGH */
case 2:
switch (h) {
default: YCbCrtoRGB(cp1[1], pp[ 5]); /* FALLTHROUGH */
case 1: YCbCrtoRGB(cp [1], pp[ 1]); /* FALLTHROUGH */
} /* FALLTHROUGH */
case 1:
switch (h) {
default: YCbCrtoRGB(cp1[0], pp[ 4]); /* FALLTHROUGH */
case 1: YCbCrtoRGB(cp [0], pp[ 0]); /* FALLTHROUGH */
} /* FALLTHROUGH */
}
if (x < 4) {
cp += x; cp1 += x;
x = 0;
}
else {
cp += 4; cp1 += 4;
x -= 4;
}
pp += 10;
}
if (h <= 2)
break;
h -= 2;
cp += incr;
cp1 += incr;
pp += fromskew;
}
}
}
/*
* 8-bit packed YCbCr samples w/ 4,1 subsampling => RGB
*/
DECLAREContigPutFunc(putcontig8bitYCbCr41tile)
{
(void) y;
fromskew = (fromskew / 4) * (4*1+2);
do {
x = w>>2;
while(x>0) {
int32 Cb = pp[4];
int32 Cr = pp[5];
YCbCrtoRGB(cp [0], pp[0]);
YCbCrtoRGB(cp [1], pp[1]);
YCbCrtoRGB(cp [2], pp[2]);
YCbCrtoRGB(cp [3], pp[3]);
cp += 4;
pp += 6;
x--;
}
if( (w&3) != 0 )
{
int32 Cb = pp[4];
int32 Cr = pp[5];
switch( (w&3) ) {
case 3: YCbCrtoRGB(cp [2], pp[2]); /*-fallthrough*/
case 2: YCbCrtoRGB(cp [1], pp[1]); /*-fallthrough*/
case 1: YCbCrtoRGB(cp [0], pp[0]); /*-fallthrough*/
case 0: break;
}
cp += (w&3);
pp += 6;
}
cp += toskew;
pp += fromskew;
} while (--h);
}
/*
* 8-bit packed YCbCr samples w/ 2,2 subsampling => RGB
*/
DECLAREContigPutFunc(putcontig8bitYCbCr22tile)
{
uint32* cp2;
int32 incr = 2*toskew+w;
(void) y;
fromskew = (fromskew / 2) * (2*2+2);
cp2 = cp+w+toskew;
while (h>=2) {
x = w;
while (x>=2) {
uint32 Cb = pp[4];
uint32 Cr = pp[5];
YCbCrtoRGB(cp[0], pp[0]);
YCbCrtoRGB(cp[1], pp[1]);
YCbCrtoRGB(cp2[0], pp[2]);
YCbCrtoRGB(cp2[1], pp[3]);
cp += 2;
cp2 += 2;
pp += 6;
x -= 2;
}
if (x==1) {
uint32 Cb = pp[4];
uint32 Cr = pp[5];
YCbCrtoRGB(cp[0], pp[0]);
YCbCrtoRGB(cp2[0], pp[2]);
cp ++ ;
cp2 ++ ;
pp += 6;
}
cp += incr;
cp2 += incr;
pp += fromskew;
h-=2;
}
if (h==1) {
x = w;
while (x>=2) {
uint32 Cb = pp[4];
uint32 Cr = pp[5];
YCbCrtoRGB(cp[0], pp[0]);
YCbCrtoRGB(cp[1], pp[1]);
cp += 2;
cp2 += 2;
pp += 6;
x -= 2;
}
if (x==1) {
uint32 Cb = pp[4];
uint32 Cr = pp[5];
YCbCrtoRGB(cp[0], pp[0]);
}
}
}
/*
* 8-bit packed YCbCr samples w/ 2,1 subsampling => RGB
*/
DECLAREContigPutFunc(putcontig8bitYCbCr21tile)
{
(void) y;
fromskew = (fromskew / 2) * (2*1+2);
do {
x = w>>1;
while(x>0) {
int32 Cb = pp[2];
int32 Cr = pp[3];
YCbCrtoRGB(cp[0], pp[0]);
YCbCrtoRGB(cp[1], pp[1]);
cp += 2;
pp += 4;
x --;
}
if( (w&1) != 0 )
{
int32 Cb = pp[2];
int32 Cr = pp[3];
YCbCrtoRGB(cp[0], pp[0]);
cp += 1;
pp += 4;
}
cp += toskew;
pp += fromskew;
} while (--h);
}
/*
* 8-bit packed YCbCr samples w/ 1,2 subsampling => RGB
*/
DECLAREContigPutFunc(putcontig8bitYCbCr12tile)
{
uint32* cp2;
int32 incr = 2*toskew+w;
(void) y;
fromskew = (fromskew / 1) * (1 * 2 + 2);
cp2 = cp+w+toskew;
while (h>=2) {
x = w;
do {
uint32 Cb = pp[2];
uint32 Cr = pp[3];
YCbCrtoRGB(cp[0], pp[0]);
YCbCrtoRGB(cp2[0], pp[1]);
cp ++;
cp2 ++;
pp += 4;
} while (--x);
cp += incr;
cp2 += incr;
pp += fromskew;
h-=2;
}
if (h==1) {
x = w;
do {
uint32 Cb = pp[2];
uint32 Cr = pp[3];
YCbCrtoRGB(cp[0], pp[0]);
cp ++;
pp += 4;
} while (--x);
}
}
/*
* 8-bit packed YCbCr samples w/ no subsampling => RGB
*/
DECLAREContigPutFunc(putcontig8bitYCbCr11tile)
{
(void) y;
fromskew = (fromskew / 1) * (1 * 1 + 2);
do {
x = w; /* was x = w>>1; patched 2000/09/25 warmerda@home.com */
do {
int32 Cb = pp[1];
int32 Cr = pp[2];
YCbCrtoRGB(*cp++, pp[0]);
pp += 3;
} while (--x);
cp += toskew;
pp += fromskew;
} while (--h);
}
/*
* 8-bit packed YCbCr samples w/ no subsampling => RGB
*/
DECLARESepPutFunc(putseparate8bitYCbCr11tile)
{
(void) y;
(void) a;
/* TODO: naming of input vars is still off, change obfuscating declaration inside define, or resolve obfuscation */
for( ; h > 0; --h) {
x = w;
do {
uint32 dr, dg, db;
TIFFYCbCrtoRGB(img->ycbcr,*r++,*g++,*b++,&dr,&dg,&db);
*cp++ = PACK(dr,dg,db);
} while (--x);
SKEW(r, g, b, fromskew);
cp += toskew;
}
}
#undef YCbCrtoRGB
static int isInRefBlackWhiteRange(float f)
{
return f > (float)(-0x7FFFFFFF + 128) && f < (float)0x7FFFFFFF;
}
static int
initYCbCrConversion(TIFFRGBAImage* img)
{
static const char module[] = "initYCbCrConversion";
float *luma, *refBlackWhite;
if (img->ycbcr == NULL) {
img->ycbcr = (TIFFYCbCrToRGB*) _TIFFmalloc(
TIFFroundup_32(sizeof (TIFFYCbCrToRGB), sizeof (long))
+ 4*256*sizeof (TIFFRGBValue)
+ 2*256*sizeof (int)
+ 3*256*sizeof (int32)
);
if (img->ycbcr == NULL) {
TIFFErrorExt(img->tif->tif_clientdata, module,
"No space for YCbCr->RGB conversion state");
return (0);
}
}
TIFFGetFieldDefaulted(img->tif, TIFFTAG_YCBCRCOEFFICIENTS, &luma);
TIFFGetFieldDefaulted(img->tif, TIFFTAG_REFERENCEBLACKWHITE,
&refBlackWhite);
/* Do some validation to avoid later issues. Detect NaN for now */
/* and also if lumaGreen is zero since we divide by it later */
if( luma[0] != luma[0] ||
luma[1] != luma[1] ||
luma[1] == 0.0 ||
luma[2] != luma[2] )
{
TIFFErrorExt(img->tif->tif_clientdata, module,
"Invalid values for YCbCrCoefficients tag");
return (0);
}
if( !isInRefBlackWhiteRange(refBlackWhite[0]) ||
!isInRefBlackWhiteRange(refBlackWhite[1]) ||
!isInRefBlackWhiteRange(refBlackWhite[2]) ||
!isInRefBlackWhiteRange(refBlackWhite[3]) ||
!isInRefBlackWhiteRange(refBlackWhite[4]) ||
!isInRefBlackWhiteRange(refBlackWhite[5]) )
{
TIFFErrorExt(img->tif->tif_clientdata, module,
"Invalid values for ReferenceBlackWhite tag");
return (0);
}
if (TIFFYCbCrToRGBInit(img->ycbcr, luma, refBlackWhite) < 0)
return(0);
return (1);
}
static tileContigRoutine
initCIELabConversion(TIFFRGBAImage* img)
{
static const char module[] = "initCIELabConversion";
float *whitePoint;
float refWhite[3];
TIFFGetFieldDefaulted(img->tif, TIFFTAG_WHITEPOINT, &whitePoint);
if (whitePoint[1] == 0.0f ) {
TIFFErrorExt(img->tif->tif_clientdata, module,
"Invalid value for WhitePoint tag.");
return NULL;
}
if (!img->cielab) {
img->cielab = (TIFFCIELabToRGB *)
_TIFFmalloc(sizeof(TIFFCIELabToRGB));
if (!img->cielab) {
TIFFErrorExt(img->tif->tif_clientdata, module,
"No space for CIE L*a*b*->RGB conversion state.");
return NULL;
}
}
refWhite[1] = 100.0F;
refWhite[0] = whitePoint[0] / whitePoint[1] * refWhite[1];
refWhite[2] = (1.0F - whitePoint[0] - whitePoint[1])
/ whitePoint[1] * refWhite[1];
if (TIFFCIELabToRGBInit(img->cielab, &display_sRGB, refWhite) < 0) {
TIFFErrorExt(img->tif->tif_clientdata, module,
"Failed to initialize CIE L*a*b*->RGB conversion state.");
_TIFFfree(img->cielab);
return NULL;
}
return putcontig8bitCIELab;
}
/*
* Greyscale images with less than 8 bits/sample are handled
* with a table to avoid lots of shifts and masks. The table
* is setup so that put*bwtile (below) can retrieve 8/bitspersample
* pixel values simply by indexing into the table with one
* number.
*/
static int
makebwmap(TIFFRGBAImage* img)
{
TIFFRGBValue* Map = img->Map;
int bitspersample = img->bitspersample;
int nsamples = 8 / bitspersample;
int i;
uint32* p;
if( nsamples == 0 )
nsamples = 1;
img->BWmap = (uint32**) _TIFFmalloc(
256*sizeof (uint32 *)+(256*nsamples*sizeof(uint32)));
if (img->BWmap == NULL) {
TIFFErrorExt(img->tif->tif_clientdata, TIFFFileName(img->tif), "No space for B&W mapping table");
return (0);
}
p = (uint32*)(img->BWmap + 256);
for (i = 0; i < 256; i++) {
TIFFRGBValue c;
img->BWmap[i] = p;
switch (bitspersample) {
#define GREY(x) c = Map[x]; *p++ = PACK(c,c,c);
case 1:
GREY(i>>7);
GREY((i>>6)&1);
GREY((i>>5)&1);
GREY((i>>4)&1);
GREY((i>>3)&1);
GREY((i>>2)&1);
GREY((i>>1)&1);
GREY(i&1);
break;
case 2:
GREY(i>>6);
GREY((i>>4)&3);
GREY((i>>2)&3);
GREY(i&3);
break;
case 4:
GREY(i>>4);
GREY(i&0xf);
break;
case 8:
case 16:
GREY(i);
break;
}
#undef GREY
}
return (1);
}
/*
* Construct a mapping table to convert from the range
* of the data samples to [0,255] --for display. This
* process also handles inverting B&W images when needed.
*/
static int
setupMap(TIFFRGBAImage* img)
{
int32 x, range;
range = (int32)((1L<<img->bitspersample)-1);
/* treat 16 bit the same as eight bit */
if( img->bitspersample == 16 )
range = (int32) 255;
img->Map = (TIFFRGBValue*) _TIFFmalloc((range+1) * sizeof (TIFFRGBValue));
if (img->Map == NULL) {
TIFFErrorExt(img->tif->tif_clientdata, TIFFFileName(img->tif),
"No space for photometric conversion table");
return (0);
}
if (img->photometric == PHOTOMETRIC_MINISWHITE) {
for (x = 0; x <= range; x++)
img->Map[x] = (TIFFRGBValue) (((range - x) * 255) / range);
} else {
for (x = 0; x <= range; x++)
img->Map[x] = (TIFFRGBValue) ((x * 255) / range);
}
if (img->bitspersample <= 16 &&
(img->photometric == PHOTOMETRIC_MINISBLACK ||
img->photometric == PHOTOMETRIC_MINISWHITE)) {
/*
* Use photometric mapping table to construct
* unpacking tables for samples <= 8 bits.
*/
if (!makebwmap(img))
return (0);
/* no longer need Map, free it */
_TIFFfree(img->Map);
img->Map = NULL;
}
return (1);
}
static int
checkcmap(TIFFRGBAImage* img)
{
uint16* r = img->redcmap;
uint16* g = img->greencmap;
uint16* b = img->bluecmap;
long n = 1L<<img->bitspersample;
while (n-- > 0)
if (*r++ >= 256 || *g++ >= 256 || *b++ >= 256)
return (16);
return (8);
}
static void
cvtcmap(TIFFRGBAImage* img)
{
uint16* r = img->redcmap;
uint16* g = img->greencmap;
uint16* b = img->bluecmap;
long i;
for (i = (1L<<img->bitspersample)-1; i >= 0; i--) {
#define CVT(x) ((uint16)((x)>>8))
r[i] = CVT(r[i]);
g[i] = CVT(g[i]);
b[i] = CVT(b[i]);
#undef CVT
}