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-rw-r--r--Build/source/texk/web2c/pdftexdir/writeimg.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/pdftexdir/writeimg.c b/Build/source/texk/web2c/pdftexdir/writeimg.c
index 0de534d28ec..29e0cd00e24 100644
--- a/Build/source/texk/web2c/pdftexdir/writeimg.c
+++ b/Build/source/texk/web2c/pdftexdir/writeimg.c
@@ -311,6 +311,11 @@ integer readimage(strnumber s, integer page_num, strnumber page_name,
read_jpg_info(img);
break;
case IMAGE_TYPE_JBIG2:
+ if (pdfversion < 4) {
+ pdftex_fail
+ ("JBIG2 images only possible with at least PDF 1.4; you are generating PDF 1.%i",
+ pdfversion);
+ }
jbig2_ptr(img) = xtalloc(1, JBIG2_IMAGE_INFO);
img_type(img) = IMAGE_TYPE_JBIG2;
jbig2_ptr(img)->selected_page = page_num;