This commit does very little for the number of files touched.

I updated gen_dynlibtiff.py so its in sync with the file(s) it creates.
I added a little more documentation to the readme.txt for adding
new file formats.

I also added two dummy functions to the tiff.c so it stopped whining
about them being NULL.

(I'm still working on the reported bugs but thought this was a good time
to at least get this in)

Kent

source/blender/imbuf/intern/dynlibtiff.c

@@ -76,8 +76,7 @@ void libtiff_loadlibtiff(void)
 	char *filename;
 	libtiff = NULL;
 
-#ifndef __APPLE__	/* no standard location of libtiff in MacOS X */
-					/* declare env var if you want to use that */
+#ifndef __APPLE__       /* no standard location of libtiff in MacOS X */
 
 	/* Try to find libtiff in a couple of standard places */
 	libtiff = PIL_dynlib_open("libtiff.so");
@@ -94,7 +93,7 @@ void libtiff_loadlibtiff(void)
 	/* For solaris */
 	libtiff = PIL_dynlib_open("/usr/openwin/lib/libtiff.so");
 	if (libtiff != NULL)  return;
-	
+
 #endif
 
 	filename = getenv("BF_TIFF_LIB");

source/blender/imbuf/intern/gen_dynlibtiff.py

@@ -104,20 +104,22 @@ C_EXTRA = \
  * LOCAL DEFINITIONS *
  *********************/
 PILdynlib *libtiff = NULL;
-void  libtiff_loadlibtiff();
+void  libtiff_loadlibtiff(void);
 void* libtiff_findsymbol(char*);
-int   libtiff_load_symbols();
+int   libtiff_load_symbols(void);
 
 
 /**************************
  * LIBRARY INITIALIZATION *
  **************************/
 
-void libtiff_loadlibtiff()
+void libtiff_loadlibtiff(void)
 {
 	char *filename;
 	libtiff = NULL;
 
+#ifndef __APPLE__       /* no standard location of libtiff in MacOS X */
+
 	/* Try to find libtiff in a couple of standard places */
 	libtiff = PIL_dynlib_open("libtiff.so");
 	if (libtiff != NULL)  return;
@@ -134,6 +136,8 @@ void libtiff_loadlibtiff()
 	libtiff = PIL_dynlib_open("/usr/openwin/lib/libtiff.so");
 	if (libtiff != NULL)  return;
 
+#endif
+
 	filename = getenv("BF_TIFF_LIB");
 	if (filename) libtiff = PIL_dynlib_open(filename);
 }
@@ -153,7 +157,7 @@ void *libtiff_findsymbol(char *name)
 	return symbol;
 }
 
-void libtiff_init()
+void libtiff_init(void)
 {
 	if (libtiff != NULL) {
 		printf("libtiff_init: Attempted to load libtiff twice!\\n");
@@ -163,7 +167,7 @@ void libtiff_init()
 	G.have_libtiff = ((libtiff != NULL) && (libtiff_load_symbols()));
 }
 
-void libtiff_exit()
+void libtiff_exit(void)
 {
 	if (libtiff != NULL) {
 		PIL_dynlib_close(libtiff);
@@ -220,7 +224,7 @@ def outputDynCFile(outfile, header_file_name):
 	outfile.write(COMMENT)
 	outfile.write('#include "%s"\n' % header_file_name)
 	outfile.write(C_EXTRA)
-	outfile.write('int libtiff_load_symbols()\n')
+	outfile.write('int libtiff_load_symbols(void)\n')
 	outfile.write('{\n')
 	for function in tiff_functions:
 		outfile.write(function.getLoadSymbol())

source/blender/imbuf/intern/tiff.c

@@ -69,6 +69,10 @@ tsize_t imb_tiff_WriteProc(thandle_t handle, tdata_t data, tsize_t n);
 toff_t  imb_tiff_SeekProc(thandle_t handle, toff_t ofs, int whence);
 int     imb_tiff_CloseProc(thandle_t handle);
 toff_t  imb_tiff_SizeProc(thandle_t handle);
+int     imb_tiff_DummyMapProc(thandle_t fd, tdata_t* pbase, toff_t* psize);
+void    imb_tiff_DummyUnmapProc(thandle_t fd, tdata_t base, toff_t size);
+
+
 /* Structure for in-memory TIFF file. */
 struct ImbTIFFMemFile {
 	unsigned char *mem;	/* Location of first byte of TIFF file. */
@@ -84,6 +88,14 @@ struct ImbTIFFMemFile {
  *****************************/
 
 
+void imb_tiff_DummyUnmapProc(thandle_t fd, tdata_t base, toff_t size)
+{
+}
+
+int imb_tiff_DummyMapProc(thandle_t fd, tdata_t* pbase, toff_t* psize) 
+{
+            return (0);
+}
 
 /**
  * Reads data from an in-memory TIFF file.
@@ -308,8 +320,7 @@ struct ImBuf *imb_loadtiff(unsigned char *mem, int size, int flags)
 		"r", (thandle_t)(&memFile),
 		imb_tiff_ReadProc, imb_tiff_WriteProc,
 		imb_tiff_SeekProc, imb_tiff_CloseProc,
-		imb_tiff_SizeProc, (TIFFMapFileProc)NULL,
-		(TIFFUnmapFileProc)NULL);
+		imb_tiff_SizeProc, imb_tiff_DummyMapProc, imb_tiff_DummyUnmapProc);
 	if (image == NULL) {
 		printf("imb_loadtiff: could not open TIFF IO layer.\n");
 		return NULL;

source/blender/imbuf/readme.txt

@@ -30,7 +30,10 @@ source/blender/src/toets.c
 source/blender/src/writeimage.c
 
 Step 5:
-edit blender/source/blender/imbuf/intern/util.c
+edit the following files:
+blender/source/blender/imbuf/intern/util.c
+blender/source/blender/src/filesel.c
+blender/source/blender/src/screendump.c
 and add your extension so that your format gets recognized in the thumbnails.
 
 Step 6: