[PATCH] bmp: honor alpha channel bits

[PATCH] bmp: honor alpha channel bits

[Enrico Scholz]

Some displays might use RGBA formats. The 'A' component must be set
there to make image opaque.

Signed-off-by: Enrico Scholz <enrico.scholz@sigma-chemnitz.de>
---
 commands/bmp.c |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/commands/bmp.c b/commands/bmp.c
index 644a977..2be6fe0 100644
--- a/commands/bmp.c
+++ b/commands/bmp.c
@@ -10,13 +10,14 @@
 #include <bmp_layout.h>
 #include <asm/byteorder.h>
 
-static inline void set_pixel(struct fb_info *info, void *adr, int r, int g, int b)
+static inline void set_pixel(struct fb_info *info, void *adr, int r, int g, int b, int a)
 {
 	u32 px;
 
 	px = (r >> (8 - info->red.length)) << info->red.offset |
 		(g >> (8 - info->green.length)) << info->green.offset |
-		(b >> (8 - info->blue.length)) << info->blue.offset;
+		(b >> (8 - info->blue.length)) << info->blue.offset |
+		(a >> (8 - info->transp.length)) << info->transp.offset;
 
 	switch (info->bits_per_pixel) {
 	case 8:
@@ -148,7 +149,7 @@ static int do_bmp(struct command *cmdtp, int argc, char *argv[])
 
 				set_pixel(&info, adr, color_table[pixel].red,
 						color_table[pixel].green,
-						color_table[pixel].blue);
+						color_table[pixel].blue, 255);
 				adr += info.bits_per_pixel >> 3;
 
 				image += bits_per_pixel >> 3;
@@ -169,7 +170,7 @@ static int do_bmp(struct command *cmdtp, int argc, char *argv[])
 				pixel = image;
 
 				set_pixel(&info, adr, pixel[2], pixel[1],
-						pixel[0]);
+						pixel[0], 255);
 				adr += info.bits_per_pixel >> 3;
 
 				image += bits_per_pixel >> 3;
-- 
1.7.7.6


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