video: Fix line padding calculation for 16 and 24 BPP bitmaps

Each row in the pixel array in the bitmap file is padded
if necessary so the row size is always a multiple of 4 bytes.
In current code the complement of row size to a multiple of
4 bytes is further unnecessarily multiplied by the pixel size.
This results in incorrect displaying of bitmaps having row size
that is not a multiple of 4 bytes. Fix this by removing
the unnecessary multiplication.

Tested with 24BPP bitmap and XRGB32 display.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Tested-by: Jaehoon Chung <jh80.chung@samsung.com>

diff --git a/drivers/video/video_bmp.c b/drivers/video/video_bmp.c
index 66de223..1e6f07f 100644 (file)
--- a/drivers/video/video_bmp.c
+++ b/drivers/video/video_bmp.c
@@ -328,7 +328,7 @@ int video_bmp_display(struct udevice *dev, ulong bmp_image, int x, int y,
                        for (j = 0; j < width; j++)
                                fb_put_word(&fb, &bmap);
 
-                       bmap += (padded_width - width) * 2;
+                       bmap += (padded_width - width);
                        fb -= width * 2 + priv->line_length;
                }
                break;
@@ -352,7 +352,7 @@ int video_bmp_display(struct udevice *dev, ulong bmp_image, int x, int y,
                                }
                        }
                        fb -= priv->line_length + width * (bpix / 8);
-                       bmap += (padded_width - width) * 3;
+                       bmap += (padded_width - width);
                }
                break;
 #endif /* CONFIG_BMP_24BPP */