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authorAntonino A. Daplas <adaplas@gmail.com>2007-05-08 00:39:09 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-05-08 11:15:30 -0700
commitbf26ad72a60c0009a99179b449a43daa6bf4b4f6 (patch)
tree55ba5c443aa0e0aa97e692f4be29c582356fd056 /drivers/video/fbmem.c
parentdc0e6e0544f1cb2af44e5d7a7e68acda05dec6fa (diff)
fbdev: advertise limitation of drawing engine
A few drivers are not capable of blitting rectangles of any dimension. vga16fb can only blit 8-pixel wide rectangles, while s3fb (in tileblitting mode) can only blit 8x16 rectangles. For example, loading a 12x22 font in vga16fb will result in a corrupt display. Advertise this limitation/capability in info->pixmap.blit_x and blit_y. These fields are 32-bit arrays (font max is 32x32 only), ie, if bit 7 is set, then width/height of 7+1 is supported. Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/video/fbmem.c')
-rw-r--r--drivers/video/fbmem.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
index 7b72841222df..c4ce3e44327e 100644
--- a/drivers/video/fbmem.c
+++ b/drivers/video/fbmem.c
@@ -1321,6 +1321,12 @@ register_framebuffer(struct fb_info *fb_info)
}
fb_info->pixmap.offset = 0;
+ if (!fb_info->pixmap.blit_x)
+ fb_info->pixmap.blit_x = ~(u32)0;
+
+ if (!fb_info->pixmap.blit_y)
+ fb_info->pixmap.blit_y = ~(u32)0;
+
if (!fb_info->modelist.prev || !fb_info->modelist.next)
INIT_LIST_HEAD(&fb_info->modelist);