opj_compress: add a -TargetBitDepth switch for TIFF output (#1384)

Sometimes, given the same (16-bit TIF) input, one wants to generate a variety of J2C outputs (say, 16-, 12-, and 10-bit). This patch allows one to downsample input files, and so makes it easier to automate OpenJPEG in mass generation of J2Cs without having to pipe though an image processing program.

1 files changed, 4 insertions, 1 deletions

diff --git a/tests/compare_images.c b/tests/compare_images.c
index 5e644f5a..f3f87639 100644
--- a/tests/compare_images.c
+++ b/tests/compare_images.c
@@ -260,6 +260,9 @@ static opj_image_t* readImageFromFileTIF(const char* filename,
 {
     opj_image_t* image_read = NULL;
     opj_cparameters_t parameters;
+#ifdef OPJ_HAVE_LIBTIFF
+    const unsigned int target_bitdepth = 0;
+#endif
     (void)nbFilenamePGX;
     (void)separator;
 
@@ -284,7 +287,7 @@ static opj_image_t* readImageFromFileTIF(const char* filename,
 
     /* Read the tif file corresponding to the component */
 #ifdef OPJ_HAVE_LIBTIFF
-    image_read = tiftoimage(filename, &parameters);
+    image_read = tiftoimage(filename, &parameters, target_bitdepth);
 #endif
     if (!image_read) {
         fprintf(stderr, "Unable to load TIF file\n");