waveshare: fix RGB for some screensizes

2020-09-14 09:48:33 +02:00
parent 9247613c0b
commit 3146305de1
1 changed files with 2 additions and 2 deletions
--- a/client/src/cmdhfwaveshare.c
+++ b/client/src/cmdhfwaveshare.c
@@ -216,8 +216,8 @@ static int read_bmp_rgb(const uint8_t *bmp, const size_t bmpsize, uint8_t **blac
            Black_data = Black_data << 1;
            Red_data = Red_data << 1;
        }
-        // Skip BMP line padding
-        offset+=(((pbmpheader->BMP_Width*3/4)+1)*4)-pbmpheader->BMP_Width*3;
+        // Skip BMP line padding: we accumulate 3* %4 per line and need one more %4 as padding
+        offset += pbmpheader->BMP_Width % 4;
    }
    return PM3_SUCCESS;
 }