SeaVGABIOS/vbe: Query driver for scanline pitch v2

Query the driver for the real scanline pitch in bytes.

As cbvga doesn't change the pitch on mode change, always
return the same pitch, that might exceed width times Bytes-per-pixel.

Report the default stdvga pitch for all other drivers.

Signed-off-by: Patrick Rudolph <siro@das-labor.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/vgasrc/cbvga.c b/vgasrc/cbvga.c
index 39ffdbb2..417ade3a 100644
--- a/vgasrc/cbvga.c
+++ b/vgasrc/cbvga.c
@@ -115,6 +115,13 @@ cbvga_set_mode(struct vgamode_s *vmode_g, int flags)
     return 0;
 }
 
+int
+cbvga_get_linesize(struct vgamode_s *vmode_g)
+{
+    /* Can't change mode, always report active pitch. */
+    return GET_GLOBAL(CBlinelength);
+}
+
 #define CB_TAG_FRAMEBUFFER      0x0012
 struct cb_framebuffer {
     u32 tag;