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-rw-r--r--source/fitz/draw-affine.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/source/fitz/draw-affine.c b/source/fitz/draw-affine.c
index 048dd6ba..08a2161c 100644
--- a/source/fitz/draw-affine.c
+++ b/source/fitz/draw-affine.c
@@ -3476,7 +3476,10 @@ fz_paint_image_imp(fz_pixmap * restrict dst, const fz_irect *scissor, const fz_p
* plotted. In this case treat it as a greyscale
* input. */
if (img->n == sa && color)
+ {
sa = 0;
+ sn = 1;
+ }
#if FZ_PLOTTERS_RGB
if (dn == 3 && img->n == 1 + sa && !color)
@@ -3507,7 +3510,7 @@ fz_paint_image_imp(fz_pixmap * restrict dst, const fz_irect *scissor, const fz_p
}
else
{
- assert((!color && sn == dn) || (color && sn == 1));
+ assert((!color && sn == dn) || (color && sn + sa == 1));
if (dolerp)
{
if (color)