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-rw-r--r--include/mupdf/fitz/device.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/include/mupdf/fitz/device.h b/include/mupdf/fitz/device.h
index 18dc4881..ef27cd5d 100644
--- a/include/mupdf/fitz/device.h
+++ b/include/mupdf/fitz/device.h
@@ -290,8 +290,12 @@ fz_device *fz_new_bbox_device(fz_context *ctx, fz_rect *rectp);
fz_new_test_device: Create a device to test for features.
Currently only tests for the presence of non-grayscale colors.
+
+ threshold: The difference from grayscale that will be tolerated.
+ Typical values to use are either 0 (be exact) and 0.02 (allow an
+ imperceptible amount of slop).
*/
-fz_device *fz_new_test_device(fz_context *ctx, int *iscolor);
+fz_device *fz_new_test_device(fz_context *ctx, int *is_color, float threshold);
/*
fz_new_draw_device: Create a device to draw on a pixmap.