[SeaBIOS] [PATCH v3 2/3] Boot up with a splash picture configurable
Wayne Xia
xiawenc at linux.vnet.ibm.com
Mon Jul 4 09:51:36 CEST 2011
fix the jpeg decoder problem emerged when it was used in 24 BPP mode.
Signed-off-by: Wayne Xia <xiawenc at linux.vnet.ibm.com>
---
src/bootsplash.c | 3 ++-
src/jpeg.c | 31 ++++++++++++++++++++++---------
src/jpeg.h | 4 ++--
3 files changed, 26 insertions(+), 12 deletions(-)
diff --git a/src/bootsplash.c b/src/bootsplash.c
index aa2299d..2ec0857 100644
--- a/src/bootsplash.c
+++ b/src/bootsplash.c
@@ -256,7 +256,8 @@ enable_bootsplash(void)
if (type == 0) {
dprintf(5, "Decompressing bootsplash.jpg\n");
- ret = jpeg_show(jpeg, picture, width, height, depth);
+ ret = jpeg_show(jpeg, picture, width, height, depth,
+ mode_info->bytes_per_scanline);
if (ret) {
dprintf(1, "jpeg_show failed with return code %d...\n", ret);
goto done;
diff --git a/src/jpeg.c b/src/jpeg.c
index 1068291..a96a9d7 100644
--- a/src/jpeg.c
+++ b/src/jpeg.c
@@ -394,10 +394,10 @@ void jpeg_get_size(struct jpeg_decdata *jpeg, int *width, int *height)
*height = jpeg->height;
}
-int jpeg_show(struct jpeg_decdata *jpeg, unsigned char *pic
- , int width, int height, int depth)
+int jpeg_show(struct jpeg_decdata *jpeg, unsigned char *pic, int width
+ , int height, int depth, int bytes_per_line_dest)
{
- int m, mcusx, mcusy, mx, my;
+ int m, mcusx, mcusy, mx, my, mloffset, jpgbpl;
int max[6];
if (jpeg->height != height)
@@ -405,6 +405,9 @@ int jpeg_show(struct jpeg_decdata *jpeg, unsigned char *pic
if (jpeg->width != width)
return ERR_WIDTH_MISMATCH;
+ jpgbpl = width * depth / 8;
+ mloffset = bytes_per_line_dest > jpgbpl ? bytes_per_line_dest : jpgbpl;
+
mcusx = jpeg->width >> 4;
mcusy = jpeg->height >> 4;
@@ -434,18 +437,18 @@ int jpeg_show(struct jpeg_decdata *jpeg, unsigned char *pic
switch (depth) {
case 32:
col221111_32(jpeg->out,
- pic + (my * 16 * mcusx + mx) * 16 * 4,
- mcusx * 16 * 4);
+ pic + (my * 16 * mloffset + mx * 16 * 4),
+ mloffset);
break;
case 24:
col221111(jpeg->out,
- pic + (my * 16 * mcusx + mx) * 16 * 3,
- mcusx * 16 * 3);
+ pic + (my * 16 * mloffset + mx * 16 * 3),
+ mloffset);
break;
case 16:
col221111_16(jpeg->out,
- pic + (my * 16 * mcusx + mx) * (16 * 2),
- mcusx * (16 * 2));
+ pic + (my * 16 * mloffset + mx * 16 * 2),
+ mloffset);
break;
default:
return ERR_DEPTH_MISMATCH;
@@ -887,6 +890,15 @@ static void initcol(PREC q[][64])
#endif
+#ifdef __LITTLE_ENDIAN
+#define PIC(yin, xin, p, xout) \
+( \
+ y = outy[(yin) * 8 + xin], \
+ STORECLAMP(p[(xout) * 3 + 2], y + cr), \
+ STORECLAMP(p[(xout) * 3 + 1], y - cg), \
+ STORECLAMP(p[(xout) * 3 + 0], y + cb) \
+)
+#else
#define PIC(yin, xin, p, xout) \
( \
y = outy[(yin) * 8 + xin], \
@@ -894,6 +906,7 @@ static void initcol(PREC q[][64])
STORECLAMP(p[(xout) * 3 + 1], y - cg), \
STORECLAMP(p[(xout) * 3 + 2], y + cb) \
)
+#endif
#ifdef __LITTLE_ENDIAN
#define PIC_16(yin, xin, p, xout, add) \
diff --git a/src/jpeg.h b/src/jpeg.h
index a2ac501..2d08f45 100644
--- a/src/jpeg.h
+++ b/src/jpeg.h
@@ -5,7 +5,7 @@ struct jpeg_decdata;
struct jpeg_decdata *jpeg_alloc(void);
int jpeg_decode(struct jpeg_decdata *jpeg, unsigned char *buf);
void jpeg_get_size(struct jpeg_decdata *jpeg, int *width, int *height);
-int jpeg_show(struct jpeg_decdata *jpeg, unsigned char *pic
- , int width, int height, int depth);
+int jpeg_show(struct jpeg_decdata *jpeg, unsigned char *pic, int width
+ , int height, int depth, int bytes_per_line_dest);
#endif
--
1.7.6.rc1.1.g2c162b
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