PNG: fix mipmapping of grayscale images

1 files changed, 1 insertions, 1 deletions

diff --git a/src/PNG.cpp b/src/PNG.cpp
index 6f83fc5..9edf88c 100644
--- a/src/PNG.cpp
+++ b/src/PNG.cpp
@@ -139,7 +139,7 @@ static void readScaled(uint8_t *data, size_t offset_w, size_t offset_h, const ch
 }
 
 void mipmap(const char *output, size_t width, size_t height, bool colored, const char *nw, const char *ne, const char *sw, const char *se) {
-	uint8_t data[4*width*height];
+	uint8_t data[(colored ? 4 : 2)*width*height];
 	std::memset(data, 0, sizeof(data));
 
 	readScaled(data, 0, 0, nw, width, height, colored);