Changes between Version 4 and Version 5 of TIFF12BitJPEG

Timestamp:

Jun 23, 2009, 11:16:32 AM (15 years ago)

Author:

warmerdam

Comment:

a few more build notes.

TIFF12BitJPEG

@@ -15 +15 @@
  * Attempt to hide non-public API entry points through the use of -fvisibility=hidden and __attribute__((visibility("default))) on the gcc toolchain.
 
-The following tickets have been opened against libtiff with regard to 12bit support.
+The following tickets have been opened against libtiff with regard to 12bit support, and patches applied.
  * [https://sourceforge.net/tracker/?func=detail&aid=2809983&group_id=159521&atid=812162 add 12bit renaming mode]
  * [https://sourceforge.net/tracker/?func=detail&aid=2809979&group_id=159521&atid=812162 add 12bit default huffman table]
+
+To build in 12bit mode it should only be necessary to define BITS_IN_JSAMPLE to 12, and NEED_12_BIT_NAMES in jmorecfg.h. 
+
+{{{
+#define BITS_IN_JSAMPLE 12
+#define NEED_12_BIT_NAMES
+}}}
 
 == libtiff ==
@@ -29 +36 @@
  * Configure.ac changes for --with-jpeg12, --with-jpeg12-include-dir, and --with-jpeg12-lib options. 
 
-The changes are all in libtiff4 (HEAD) CVS now.  No effort has been made to back port this to libtiff3.9.
+The changes are all in libtiff4 (HEAD) CVS now.  No effort has been made to back port this to libtiff3.9.  To build add the following definitions in tif_config.h:
+
+{{{
+/* 8/12 bit libjpeg dual mode enabled */
+#define JPEG_DUAL_MODE_8_12 1
+/* 12bit libjpeg primary include file with path */
+#define LIBJPEG_12_PATH "/home/warmerda/wrk/jpeg_12/bld/include/jpeglib.h"
+}}}
+
+and link against the appropriate 12bit library or on linux/unix configure like:
+
+{{{
+    --enable-jpeg12 \
+    --with-jpeg12-include-dir=/home/warmerda/wrk/jpeg_12/bld/include \
+    --with-jpeg12-lib=/home/warmerda/wrk/jpeg_12/bld/lib/libjpeg.la
+}}}
 
 == GDAL ==