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-rw-r--r--libdimension/png.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libdimension/png.c b/libdimension/png.c
index 9ff2afc..7a327d6 100644
--- a/libdimension/png.c
+++ b/libdimension/png.c
@@ -94,7 +94,7 @@ dmnsn_png_optimizer_fn(const dmnsn_canvas *canvas,
pixel[2] = sRGB.B*UINT16_MAX;
}
- double alpha = color.filter + color.trans;
+ double alpha = dmnsn_color_intensity(color)*color.filter + color.trans;
if (alpha <= 0.0) {
pixel[3] = 0;
} else if (alpha >= 1.0) {