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/*
* tiff.c --
*
* A photo image file handler for TIFF files.
*
* Uses the libtiff.so library, which is dynamically
* loaded only when used.
*/
/* Author : Jan Nijtmans */
/* Date : 7/16/97 */
/*
* Generic initialization code, parameterized via CPACKAGE and PACKAGE.
*/
#ifdef _WIN32
# define HAVE_BOOLEAN
#endif
#include "tkimg.h"
#include "tifftcl.h"
#include "zlibtcl.h"
#ifdef HAVE_STDLIB_H
#undef HAVE_STDLIB_H
#endif
#include "jpegtcl.h"
static int SetupTiffLibrary(Tcl_Interp *interp);
#define MORE_INITIALIZATION \
if (SetupTiffLibrary (interp) != TCL_OK) { return TCL_ERROR; }
#include "init.c"
#include "tiffInt.h"
extern DLLIMPORT int unlink(const char *);
/*
* Prototypes for local procedures defined in this file:
*/
static int getint(unsigned char *buf, TIFFDataType format,
int order);
static int CommonMatch(tkimg_MFile *handle, int *widhtPtr,
int *heightPtr);
static int CommonRead(Tcl_Interp *interp, TIFF *tif,
Tcl_Obj *format, Tk_PhotoHandle imageHandle, int destX, int destY,
int width, int height, int srcX, int srcY);
static int CommonWrite(Tcl_Interp *interp, TIFF *tif,
int comp, Tk_PhotoImageBlock *blockPtr);
static int ParseWriteFormat(Tcl_Interp *interp, Tcl_Obj *format,
int *comp, const char **mode);
static void _TIFFerr(const char *, const char *, va_list);
static void _TIFFwarn(const char *, const char *, va_list);
/*
* The functions for the TIFF input handler
*/
static int mapDummy(thandle_t, tdata_t *, toff_t *);
static void unMapDummy(thandle_t, tdata_t, toff_t);
static int closeDummy(thandle_t);
static tsize_t writeDummy(thandle_t, tdata_t, tsize_t);
static tsize_t readMFile(thandle_t, tdata_t, tsize_t);
static toff_t seekMFile(thandle_t, toff_t, int);
static toff_t sizeMFile(thandle_t);
static tsize_t readString(thandle_t, tdata_t, tsize_t);
static tsize_t writeString(thandle_t, tdata_t, tsize_t);
static toff_t seekString(thandle_t, toff_t, int);
static toff_t sizeString(thandle_t);
static char *errorMessage = NULL;
static int
SetupTiffLibrary (interp)
Tcl_Interp *interp;
{
static int initialized = 0;
if (Tifftcl_InitStubs(interp, TIFFTCL_VERSION, 0) == NULL) {
return TCL_ERROR;
}
if (errorMessage) {
ckfree(errorMessage);
errorMessage = NULL;
}
if (TIFFSetErrorHandler != NULL) {
TIFFSetErrorHandler(_TIFFerr);
}
if (TIFFSetWarningHandler != NULL) {
TIFFSetWarningHandler(_TIFFwarn);
}
/*
* Initialize jpeg and zlib too, for use by the CODEC's we register
* with the base TIFF library in this package.
*/
if (Jpegtcl_InitStubs(interp, JPEGTCL_VERSION, 0) == NULL) {
return TCL_ERROR;
}
if (!initialized) {
initialized = 1;
if (
TIFFRegisterCODEC && TIFFError && TIFFPredictorInit &&
TIFFMergeFieldInfo && TIFFFlushData1 && _TIFFNoPostDecode &&
TIFFTileRowSize && TIFFScanlineSize && _TIFFsetByteArray &&
TIFFVSetField && TIFFSwabArrayOfShort
) {
if (Zlibtcl_InitStubs(interp, ZLIBTCL_VERSION, 0) == NULL) {
return TCL_ERROR;
}
TIFFRegisterCODEC (COMPRESSION_DEFLATE, "Deflate", TkimgTIFFInitZip);
TIFFRegisterCODEC (COMPRESSION_ADOBE_DEFLATE, "AdobeDeflate", TkimgTIFFInitZip);
if (Jpegtcl_InitStubs(interp, JPEGTCL_VERSION, 0) == NULL) {
return TCL_ERROR;
}
TIFFRegisterCODEC (COMPRESSION_JPEG, "JPEG", TkimgTIFFInitJpeg);
TIFFRegisterCODEC (COMPRESSION_PIXARLOG, "PixarLog", TkimgTIFFInitPixar);
}
}
return TCL_OK;
}
static int
getint(buf, format, order)
unsigned char *buf;
TIFFDataType format;
int order;
{
int result;
switch (format) {
case TIFF_BYTE:
result = buf[0]; break;
case TIFF_SHORT:
result = (buf[order]<<8) + buf[1-order]; break;
case TIFF_LONG:
if (order) {
result = (buf[3]<<24) + (buf[2]<<16) + (buf[1]<<8) + buf[0];
} else {
result = (buf[0]<<24) + (buf[1]<<16) + (buf[2]<<8) + buf[3];
}; break;
default:
result = -1;
}
return result;
}
static void
_TIFFerr(module, fmt, ap)
const char *module;
const char *fmt;
va_list ap;
{
char buf [2048];
char *cp = buf;
if (module != NULL) {
sprintf(cp, "%s: ", module);
cp += strlen(module) + 2;
}
vsprintf(cp, fmt, ap);
if (errorMessage) {
ckfree(errorMessage);
}
errorMessage = (char *) ckalloc(strlen(buf)+1);
strcpy(errorMessage, buf);
}
/* warnings are not processed in Tcl */
static void
_TIFFwarn(module, fmt, ap)
const char *module;
const char *fmt;
va_list ap;
{
}
static int
mapDummy(fd, base, size)
thandle_t fd;
tdata_t *base;
toff_t *size;
{
return (toff_t) 0;
}
static void
unMapDummy(fd, base, size)
thandle_t fd;
tdata_t base;
toff_t size;
{
}
static int
closeDummy(fd)
thandle_t fd;
{
return 0;
}
static tsize_t
writeDummy(fd, data, size)
thandle_t fd;
tdata_t data;
tsize_t size;
{
return size;
}
static tsize_t
readMFile(fd, data, size)
thandle_t fd;
tdata_t data;
tsize_t size;
{
return (tsize_t) tkimg_Read((tkimg_MFile *) fd, (char *) data, (int) size) ;
}
static toff_t
seekMFile(fd, off, whence)
thandle_t fd;
toff_t off;
int whence;
{
return Tcl_Seek((Tcl_Channel) ((tkimg_MFile *) fd)->data, (int) off, whence);
}
static toff_t
sizeMFile(fd)
thandle_t fd;
{
int fsize;
return (fsize = Tcl_Seek((Tcl_Channel) ((tkimg_MFile *) fd)->data,
(int) 0, SEEK_END)) < 0 ? 0 : (toff_t) fsize;
}
/*
* In the following functions "handle" is used differently for speed reasons:
*
* handle.buffer (writing only) dstring used for writing.
* handle.data pointer to first character
* handle.lenght size of data
* handle.state "file" position pointer.
*
* After a read, only the position pointer is adapted, not the other fields.
*/
static tsize_t
readString(fd, data, size)
thandle_t fd;
tdata_t data;
tsize_t size;
{
register tkimg_MFile *handle = (tkimg_MFile *) fd;
if ((size + handle->state) > handle->length) {
size = handle->length - handle->state;
}
if (size) {
memcpy((char *) data, handle->data + handle->state, (size_t) size);
handle->state += size;
}
return size;
}
static tsize_t
writeString(fd, data, size)
thandle_t fd;
tdata_t data;
tsize_t size;
{
register tkimg_MFile *handle = (tkimg_MFile *) fd;
if (handle->state + size > handle->length) {
handle->length = handle->state + size;
Tcl_DStringSetLength(handle->buffer, handle->length);
handle->data = Tcl_DStringValue(handle->buffer);
}
memcpy(handle->data + handle->state, (char *) data, (size_t) size);
handle->state += size;
return size;
}
static toff_t
seekString(fd, off, whence)
thandle_t fd;
toff_t off;
int whence;
{
register tkimg_MFile *handle = (tkimg_MFile *) fd;
switch (whence) {
case SEEK_SET:
handle->state = (int) off;
break;
case SEEK_CUR:
handle->state += (int) off;
break;
case SEEK_END:
handle->state = handle->length + (int) off;
break;
}
if (handle->state < 0) {
handle->state = 0;
return -1;
}
return (toff_t) handle->state;
}
static toff_t
sizeString(fd)
thandle_t fd;
{
return ((tkimg_MFile *) fd)->length;
}
/*
*----------------------------------------------------------------------
*
* ObjMatchTIFF --
*
* This procedure is invoked by the photo image type to see if
* a string contains image data in TIFF format.
*
* Results:
* The return value is 1 if the first characters in the string
* is like TIFF data, and 0 otherwise.
*
* Side effects:
* the size of the image is placed in widthPre and heightPtr.
*
*----------------------------------------------------------------------
*/
static int
ObjMatch(
Tcl_Obj *data, /* the object containing the image data */
Tcl_Obj *format, /* the image format string */
int *widthPtr, /* where to put the string width */
int *heightPtr, /* where to put the string height */
Tcl_Interp *interp
) {
tkimg_MFile handle;
if (!tkimg_ReadInit(data, '\111', &handle) &&
!tkimg_ReadInit(data, '\115', &handle)) {
return 0;
}
return CommonMatch(&handle, widthPtr, heightPtr);
}
static int ChnMatch(
Tcl_Channel chan,
const char *fileName,
Tcl_Obj *format,
int *widthPtr,
int *heightPtr,
Tcl_Interp *interp
) {
tkimg_MFile handle;
handle.data = (char *) chan;
handle.state = IMG_CHAN;
return CommonMatch(&handle, widthPtr, heightPtr);
}
static int
CommonMatch(handle, widthPtr, heightPtr)
tkimg_MFile *handle;
int *widthPtr, *heightPtr;
{
unsigned char buf[4096];
int i, j, order, w = 0, h = 0;
i = tkimg_Read(handle, (char *) buf, 8);
order = (buf[0] == '\111');
if ((i != 8) || (buf[0] != buf[1])
|| ((buf[0] != '\111') && (buf[0] != '\115'))
|| (getint(buf+2,TIFF_SHORT,order) != 42)) {
return 0;
}
i = getint(buf+4,TIFF_LONG,order);
while (i > 4104) {
i -= 4096;
tkimg_Read(handle, (char *) buf, 4096);
}
if (i>8) {
tkimg_Read(handle, (char *) buf, i-8);
}
tkimg_Read(handle, (char *) buf, 2);
i = getint(buf,TIFF_SHORT,order);
while (i--) {
tkimg_Read(handle, (char *) buf, 12);
if (buf[order]!=1) continue;
j = getint(buf+2,TIFF_SHORT,order);
j = getint(buf+8, (TIFFDataType) j, order);
if (buf[1-order]==0) {
w = j;
if (h>0) break;
} else if (buf[1-order]==1) {
h = j;
if (w>0) break;
}
}
if ((w <= 0) || (h <= 0)) {
return 0;
}
*widthPtr = w;
*heightPtr = h;
return 1;
}
static int
ObjRead(interp, data, format, imageHandle,
destX, destY, width, height, srcX, srcY)
Tcl_Interp *interp;
Tcl_Obj *data; /* object containing the image */
Tcl_Obj *format;
Tk_PhotoHandle imageHandle;
int destX, destY;
int width, height;
int srcX, srcY;
{
TIFF *tif;
char *tempFileName = NULL, tempFileNameBuffer[256];
int count, result;
tkimg_MFile handle;
char buffer[1024];
char *dataPtr = NULL;
if (!tkimg_ReadInit(data, '\115', &handle)) {
tkimg_ReadInit(data, '\111', &handle);
}
if (TIFFClientOpen) {
if (handle.state != IMG_STRING) {
dataPtr = ckalloc((handle.length*3)/4 + 2);
handle.length = tkimg_Read(&handle, dataPtr, handle.length);
handle.data = dataPtr;
}
handle.state = 0;
tif = TIFFClientOpen("inline data", "r", (thandle_t) &handle,
readString, writeString, seekString, closeDummy,
sizeString, mapDummy, unMapDummy);
} else {
Tcl_Channel outchan;
tempFileName = tmpnam(tempFileNameBuffer);
outchan = tkimg_OpenFileChannel(interp, tempFileName, 0644);
if (!outchan) {
return TCL_ERROR;
}
count = tkimg_Read(&handle, buffer, 1024);
while (count == 1024) {
Tcl_Write(outchan, buffer, count);
count = tkimg_Read(&handle, buffer, 1024);
}
if (count>0){
Tcl_Write(outchan, buffer, count);
}
if (Tcl_Close(interp, outchan) == TCL_ERROR) {
return TCL_ERROR;
}
tif = TIFFOpen(tempFileName, "r");
}
if (tif != NULL) {
result = CommonRead(interp, tif, format, imageHandle,
destX, destY, width, height, srcX, srcY);
} else {
result = TCL_ERROR;
}
if (tempFileName) {
unlink(tempFileName);
}
if (result == TCL_ERROR) {
Tcl_AppendResult(interp, errorMessage, (char *) NULL);
ckfree(errorMessage);
errorMessage = NULL;
}
if (dataPtr) {
ckfree(dataPtr);
}
return result;
}
static int
ChnRead(interp, chan, fileName, format, imageHandle,
destX, destY, width, height, srcX, srcY)
Tcl_Interp *interp;
Tcl_Channel chan;
const char *fileName;
Tcl_Obj *format;
Tk_PhotoHandle imageHandle;
int destX, destY;
int width, height;
int srcX, srcY;
{
TIFF *tif;
char *tempFileName = NULL, tempFileNameBuffer[256];
int count, result;
char buffer[1024];
if (TIFFClientOpen) {
tkimg_MFile handle;
handle.data = (char *) chan;
handle.state = IMG_CHAN;
tif = TIFFClientOpen(fileName, "r", (thandle_t) &handle,
readMFile, writeDummy, seekMFile, closeDummy,
sizeMFile, mapDummy, unMapDummy);
} else {
Tcl_Channel outchan;
tempFileName = tmpnam(tempFileNameBuffer);
outchan = tkimg_OpenFileChannel(interp, tempFileName, 0644);
if (!outchan) {
return TCL_ERROR;
}
count = Tcl_Read(chan, buffer, 1024);
while (count == 1024) {
Tcl_Write(outchan, buffer, count);
count = Tcl_Read(chan, buffer, 1024);
}
if (count>0){
Tcl_Write(outchan, buffer, count);
}
if (Tcl_Close(interp, outchan) == TCL_ERROR) {
return TCL_ERROR;
}
tif = TIFFOpen(tempFileName, "r");
}
if (tif) {
result = CommonRead(interp, tif, format, imageHandle,
destX, destY, width, height, srcX, srcY);
} else {
result = TCL_ERROR;
}
if (tempFileName) {
unlink(tempFileName);
}
if (result == TCL_ERROR) {
Tcl_AppendResult(interp, errorMessage, (char *) NULL);
ckfree(errorMessage);
errorMessage = 0;
}
return result;
}
static int
CommonRead(interp, tif, format, imageHandle,
destX, destY, width, height, srcX, srcY)
Tcl_Interp *interp;
TIFF *tif;
Tcl_Obj *format;
Tk_PhotoHandle imageHandle;
int destX, destY;
int width, height;
int srcX, srcY;
{
Tk_PhotoImageBlock block;
uint32 w, h;
size_t npixels;
uint32 *raster;
int result = TCL_OK;
int nBytes, index = 0, objc = 0;
Tcl_Obj **objv = NULL;
if (tkimg_ListObjGetElements(interp, format, &objc, &objv) != TCL_OK) {
return TCL_ERROR;
}
if (objc > 1) {
char *c = Tcl_GetStringFromObj(objv[1], &nBytes);
if ((objc > 3) || ((objc == 3) && ((c[0] != '-') ||
(c[1] != 'i') || strncmp(c, "-index", strlen(c))))) {
Tcl_AppendResult(interp, "invalid format: \"",
tkimg_GetStringFromObj(format, NULL), "\"", (char *) NULL);
return TCL_ERROR;
}
if (Tcl_GetIntFromObj(interp, objv[objc-1], &index) != TCL_OK) {
return TCL_ERROR;
}
}
while (index-- != 0) {
if (TIFFReadDirectory(tif) != 1) {
Tcl_AppendResult(interp,"no image data for this index",
(char *) NULL);
return TCL_ERROR;
}
}
#ifdef WORDS_BIGENDIAN
block.offset[0] = 3;
block.offset[1] = 2;
block.offset[2] = 1;
block.offset[3] = 0;
#else
block.offset[0] = 0;
block.offset[1] = 1;
block.offset[2] = 2;
block.offset[3] = 3;
#endif
block.pixelSize = sizeof (uint32);
TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, &w);
TIFFGetField(tif, TIFFTAG_IMAGELENGTH, &h);
npixels = w * h;
raster = (uint32*) TkimgTIFFmalloc(npixels * sizeof (uint32));
block.width = w;
block.height = h;
block.pitch = - (block.pixelSize * (int) w);
block.pixelPtr = ((unsigned char *) raster) + ((1-h) * block.pitch);
if (raster == NULL) {
printf("cannot malloc\n");
return TCL_ERROR;
}
if (!TIFFReadRGBAImage(tif, w, h, raster, 0) || errorMessage) {
TkimgTIFFfree (raster);
if (errorMessage) {
Tcl_AppendResult(interp, errorMessage, (char *) NULL);
ckfree(errorMessage);
errorMessage = NULL;
}
return TCL_ERROR;
}
block.pixelPtr += srcY * block.pitch
+ srcX * block.pixelSize;
block.offset[3] = block.offset[0]; /* don't use transparency */
if (tkimg_PhotoPutBlock(interp, imageHandle, &block, destX,
destY, width, height, TK_PHOTO_COMPOSITE_SET) == TCL_ERROR) {
result = TCL_ERROR;
}
TkimgTIFFfree (raster);
TIFFClose(tif);
return result;
}
static int StringWrite(
Tcl_Interp *interp,
Tcl_Obj *format,
Tk_PhotoImageBlock *blockPtr
) {
TIFF *tif;
int result, comp;
tkimg_MFile handle;
char *tempFileName = NULL, tempFileNameBuffer[256];
Tcl_DString dstring;
const char *mode;
Tcl_DString data;
Tcl_DStringInit(&data);
if (ParseWriteFormat(interp, format, &comp, &mode) != TCL_OK) {
return TCL_ERROR;
}
if (TIFFClientOpen) {
Tcl_DStringInit(&dstring);
tkimg_WriteInit(&dstring, &handle);
tif = TIFFClientOpen("inline data", mode, (thandle_t) &handle,
readString, writeString, seekString, closeDummy,
sizeString, mapDummy, unMapDummy);
} else {
tempFileName = tmpnam(tempFileNameBuffer);
tif = TIFFOpen(tempFileName,mode);
}
result = CommonWrite(interp, tif, comp, blockPtr);
TIFFClose(tif);
if (result != TCL_OK) {
if (tempFileName) {
unlink(tempFileName);
}
Tcl_AppendResult(interp, errorMessage, (char *) NULL);
ckfree(errorMessage);
errorMessage = NULL;
return TCL_ERROR;
}
if (tempFileName) {
Tcl_Channel inchan;
char buffer[1024];
inchan = tkimg_OpenFileChannel(interp, tempFileName, 0644);
if (!inchan) {
return TCL_ERROR;
}
tkimg_WriteInit(&data, &handle);
result = Tcl_Read(inchan, buffer, 1024);
while ((result == TCL_OK) && !Tcl_Eof(inchan)) {
tkimg_Write(&handle, buffer, result);
result = Tcl_Read(inchan, buffer, 1024);
}
if (result == TCL_OK) {
tkimg_Write(&handle, buffer, result);
result = Tcl_Close(interp, inchan);
}
unlink(tempFileName);
} else {
int length = handle.length;
tkimg_WriteInit(&data, &handle);
tkimg_Write(&handle, Tcl_DStringValue(&dstring), length);
Tcl_DStringFree(&dstring);
}
tkimg_Putc(IMG_DONE, &handle);
if (result == TCL_OK) {
Tcl_DStringResult(interp, &data);
} else {
Tcl_DStringFree(&data);
}
return result;
}
static int
ChnWrite(interp, filename, format, blockPtr)
Tcl_Interp *interp;
const char *filename;
Tcl_Obj *format;
Tk_PhotoImageBlock *blockPtr;
{
TIFF *tif;
int result, comp;
Tcl_DString nameBuffer;
const char *fullname, *mode;
if (!(fullname=Tcl_TranslateFileName(interp, filename, &nameBuffer))) {
return TCL_ERROR;
}
if (ParseWriteFormat(interp, format, &comp, &mode) != TCL_OK) {
Tcl_DStringFree(&nameBuffer);
return TCL_ERROR;
}
if (!(tif = TIFFOpen(fullname, mode))) {
Tcl_AppendResult(interp, filename, ": ", Tcl_PosixError(interp),
(char *)NULL);
Tcl_DStringFree(&nameBuffer);
return TCL_ERROR;
}
Tcl_DStringFree(&nameBuffer);
result = CommonWrite(interp, tif, comp, blockPtr);
TIFFClose(tif);
return result;
}
static int
ParseWriteFormat(interp, format, comp, mode)
Tcl_Interp *interp;
Tcl_Obj *format;
int *comp;
const char **mode;
{
static const char *const tiffWriteOptions[] = {
"-compression",
"-byteorder",
NULL
};
int objc, length, c, i, index;
Tcl_Obj **objv;
const char *compression, *byteorder;
*comp = COMPRESSION_NONE;
*mode = "w";
if (tkimg_ListObjGetElements(interp, format, &objc, &objv) != TCL_OK)
return TCL_ERROR;
if (objc) {
compression = "none";
byteorder = "";
for (i=1; i<objc; i++) {
if (Tcl_GetIndexFromObj(interp, objv[i], (CONST84 char *CONST86 *)tiffWriteOptions,
"format option", 0, &index) !=TCL_OK) {
return TCL_ERROR;
}
if (++i >= objc) {
Tcl_AppendResult(interp, "No value for option \"",
Tcl_GetStringFromObj(objv[--i], (int *) NULL),
"\"", (char *) NULL);
return TCL_ERROR;
}
switch(index) {
case 0:
compression = Tcl_GetStringFromObj(objv[i], (int *) NULL); break;
case 1:
byteorder = Tcl_GetStringFromObj(objv[i], (int *) NULL); break;
}
}
c = compression[0]; length = strlen(compression);
if ((c == 'n') && (!strncmp(compression,"none",length))) {
*comp = COMPRESSION_NONE;
} else if ((c == 'd') && (!strncmp(compression,"deflate",length))) {
*comp = COMPRESSION_DEFLATE;
} else if ((c == 'j') && (!strncmp(compression,"jpeg",length))) {
*comp = COMPRESSION_JPEG;
} else if ((c == 'l') && (length>1) && (!strncmp(compression,"logluv",length))) {
*comp = COMPRESSION_SGILOG;
} else if ((c == 'l') && (length>1) && (!strncmp(compression,"lzw",length))) {
*comp = COMPRESSION_LZW;
} else if ((c == 'p') && (length>1) && (!strncmp(compression,"packbits",length))) {
*comp = COMPRESSION_PACKBITS;
} else if ((c == 'p') && (length>1) && (!strncmp(compression,"pixarlog",length))) {
*comp = COMPRESSION_PIXARLOG;
} else {
Tcl_AppendResult(interp, "invalid compression mode \"",
compression,"\": should be deflate, jpeg, logluv, lzw, ",
"packbits, pixarlog, or none", (char *) NULL);
return TCL_ERROR;
}
c = byteorder[0]; length = strlen(byteorder);
if (c == 0) {
*mode = "w";
} else if ((c == 's') && (!strncmp(byteorder,"smallendian", length))) {
*mode = "wl";
} else if ((c == 'l') && (!strncmp(byteorder,"littleendian", length))) {
*mode = "wl";
} else if ((c == 'b') && (!strncmp(byteorder,"bigendian", length))) {
*mode = "wb";
} else if ((c == 'n') && (!strncmp(byteorder,"network", length))) {
*mode = "wb";
} else {
Tcl_AppendResult(interp, "invalid byteorder \"",
byteorder,"\": should be bigendian, littleendian",
"network, smallendian, or {}", (char *) NULL);
return TCL_ERROR;
}
}
return TCL_OK;
}
static int
CommonWrite(interp, tif, comp, blockPtr)
Tcl_Interp *interp;
TIFF *tif;
int comp;
Tk_PhotoImageBlock *blockPtr;
{
int numsamples;
unsigned char *data = NULL;
TIFFSetField(tif, TIFFTAG_IMAGEWIDTH, blockPtr->width);
TIFFSetField(tif, TIFFTAG_IMAGELENGTH, blockPtr->height);
TIFFSetField(tif, TIFFTAG_COMPRESSION, comp);
TIFFSetField(tif, TIFFTAG_PLANARCONFIG, PLANARCONFIG_CONTIG);
TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, 1);
TIFFSetField(tif, TIFFTAG_ORIENTATION, ORIENTATION_TOPLEFT);
TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, blockPtr->height);
TIFFSetField(tif, TIFFTAG_RESOLUTIONUNIT, (int)2);
TIFFSetField(tif, TIFFTAG_XRESOLUTION, (float)1200.0);
TIFFSetField(tif, TIFFTAG_YRESOLUTION, (float)1200.0);
TIFFSetField(tif, TIFFTAG_BITSPERSAMPLE, 8);
if ((blockPtr->offset[0] == blockPtr->offset[1])
&& (blockPtr->offset[0] == blockPtr->offset[2])) {
numsamples = 1;
TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, 1);
TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_MINISBLACK);
} else {
numsamples = 3;
TIFFSetField(tif, TIFFTAG_SAMPLESPERPIXEL, 3);
TIFFSetField(tif, TIFFTAG_PHOTOMETRIC, PHOTOMETRIC_RGB);
}
if ((blockPtr->pitch == numsamples * blockPtr->width)
&& (blockPtr->pixelSize == numsamples)) {
data = blockPtr->pixelPtr;
} else {
unsigned char *srcPtr, *dstPtr, *rowPtr;
int greenOffset, blueOffset, alphaOffset, x, y;
dstPtr = data = (unsigned char *) ckalloc(numsamples *
blockPtr->width * blockPtr->height);
rowPtr = blockPtr->pixelPtr + blockPtr->offset[0];
greenOffset = blockPtr->offset[1] - blockPtr->offset[0];
blueOffset = blockPtr->offset[2] - blockPtr->offset[0];
alphaOffset = blockPtr->offset[0];
if (alphaOffset < blockPtr->offset[2]) {
alphaOffset = blockPtr->offset[2];
}
if (++alphaOffset < blockPtr->pixelSize) {
alphaOffset -= blockPtr->offset[0];
} else {
alphaOffset = 0;
}
if (blueOffset || greenOffset) {
for (y = blockPtr->height; y > 0; y--) {
srcPtr = rowPtr;
for (x = blockPtr->width; x>0; x--) {
if (alphaOffset && !srcPtr[alphaOffset]) {
*dstPtr++ = 0xd9;
*dstPtr++ = 0xd9;
*dstPtr++ = 0xd9;
} else {
*dstPtr++ = srcPtr[0];
*dstPtr++ = srcPtr[greenOffset];
*dstPtr++ = srcPtr[blueOffset];
}
srcPtr += blockPtr->pixelSize;
}
rowPtr += blockPtr->pitch;
}
} else {
for (y = blockPtr->height; y > 0; y--) {
srcPtr = rowPtr;
for (x = blockPtr->width; x>0; x--) {
*dstPtr++ = srcPtr[0];
srcPtr += blockPtr->pixelSize;
}
rowPtr += blockPtr->pitch;
}
}
}
TIFFWriteEncodedStrip(tif, 0, data,
numsamples * blockPtr->width * blockPtr->height);
if (data != blockPtr->pixelPtr) {
ckfree((char *) data);
}
return TCL_OK;
}
void
TkimgTIFFfree (data)
tdata_t data;
{
if (_TIFFfree) {
_TIFFfree(data);
} else {
ckfree((char *) data);
}
}
tdata_t
TkimgTIFFmalloc(size)
tsize_t size;
{
if (_TIFFmalloc) {
return _TIFFmalloc(size);
} else {
return ckalloc(size);
}
}
tdata_t
TkimgTIFFrealloc(data, size)
tdata_t data;
tsize_t size;
{
if (_TIFFrealloc) {
return _TIFFrealloc(data, size);
} else {
return ckrealloc(data, size);
}
}
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