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authorStefan Roese <sr@denx.de>2019-01-30 08:54:12 +0100
committerAnatolij Gustschin <agust@denx.de>2019-02-15 16:51:12 +0100
commite25710305da0f087a374ad41d5fa1f244469f6f2 (patch)
treeefcd796a4fdbf9419118deb03e1fb6375b8ed7a1
parent0220f8c223f088cc722b81fc1db23734de87a13d (diff)
video: bmp: Add support for 24bpp BMP files on 16bpp displays
This patch adds support to load 24bpp BMP files on 16bpp displays. This will be used by the theadorable board. The "old" bmp command did support this operartion mode and to not break compatibility with the move to DM_VIDEO, we need to add this support to the "new" bmp code. Signed-off-by: Stefan Roese <sr@denx.de> Reviewed-by: Anatolij Gustschin <agust@denx.de> Acked-by: Anatolij Gustschin <agust@denx.de>
-rw-r--r--drivers/video/video_bmp.c23
1 files changed, 17 insertions, 6 deletions
diff --git a/drivers/video/video_bmp.c b/drivers/video/video_bmp.c
index 2898b0b55d..193f37d275 100644
--- a/drivers/video/video_bmp.c
+++ b/drivers/video/video_bmp.c
@@ -229,11 +229,12 @@ int video_bmp_display(struct udevice *dev, ulong bmp_image, int x, int y,
}
/*
- * We support displaying 8bpp BMPs on 16bpp LCDs
+ * We support displaying 8bpp and 24bpp BMPs on 16bpp LCDs
* and displaying 24bpp BMPs on 32bpp LCDs
- * */
+ */
if (bpix != bmp_bpix &&
!(bmp_bpix == 8 && bpix == 16) &&
+ !(bmp_bpix == 24 && bpix == 16) &&
!(bmp_bpix == 24 && bpix == 32)) {
printf("Error: %d bit/pixel mode, but BMP has %d bit/pixel\n",
bpix, get_unaligned_le16(&bmp->header.bit_count));
@@ -318,12 +319,22 @@ int video_bmp_display(struct udevice *dev, ulong bmp_image, int x, int y,
case 24:
for (i = 0; i < height; ++i) {
for (j = 0; j < width; j++) {
- *(fb++) = *(bmap++);
- *(fb++) = *(bmap++);
- *(fb++) = *(bmap++);
- *(fb++) = 0;
+ if (bpix == 16) {
+ /* 16bit 555RGB format */
+ *(u16 *)fb = ((bmap[2] >> 3) << 10) |
+ ((bmap[1] >> 3) << 5) |
+ (bmap[0] >> 3);
+ bmap += 3;
+ fb += 2;
+ } else {
+ *(fb++) = *(bmap++);
+ *(fb++) = *(bmap++);
+ *(fb++) = *(bmap++);
+ *(fb++) = 0;
+ }
}
fb -= priv->line_length + width * (bpix / 8);
+ bmap += (padded_width - width) * 3;
}
break;
#endif /* CONFIG_BMP_24BPP */