diff options
author | Mikulas Patocka <mpatocka@redhat.com> | 2014-01-23 14:41:59 -0500 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-05-13 13:59:43 +0200 |
commit | ecb4abb32b38bd7ef4a1fd0c8c122c6491f534c5 (patch) | |
tree | 61007ee9195a88e9aa43cab8be1a722cf0241386 /drivers/video/aty | |
parent | 032a61b41df3fe43554d4aee1ec9f84ce0eda1db (diff) |
mach64: fix cursor when character width is not a multiple of 8 pixels
commit 43751a1b8ee2e70ce392bf31ef3133da324e68b3 upstream.
This patch fixes the hardware cursor on mach64 when font width is not a
multiple of 8 pixels.
If you load such a font, the cursor is expanded to the next 8-byte
boundary and a part of the next character after the cursor is not
visible.
For example, when you load a font with 12-pixel width, the cursor width
is 16 pixels and when the cursor is displayed, 4 pixels of the next
character are not visible.
The reason is this: atyfb_cursor is called with proper parameters to
load an image that is 12-pixel wide. However, the number is aligned on
the next 8-pixel boundary on the line
"unsigned int width = (cursor->image.width + 7) >> 3;" and the whole
function acts as it is was loading a 16-pixel image.
This patch fixes it so that the value written to the framebuffer is
padded with 0xaaaa (the transparent pattern) when the image size it not
a multiple of 8 pixels. The transparent pattern causes that the cursor
will not interfere with the next character.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/video/aty')
-rw-r--r-- | drivers/video/aty/mach64_cursor.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/drivers/video/aty/mach64_cursor.c b/drivers/video/aty/mach64_cursor.c index 95ec042ddbf8..0fe02e22d9a4 100644 --- a/drivers/video/aty/mach64_cursor.c +++ b/drivers/video/aty/mach64_cursor.c @@ -5,6 +5,7 @@ #include <linux/fb.h> #include <linux/init.h> #include <linux/string.h> +#include "../fb_draw.h" #include <asm/io.h> @@ -157,24 +158,33 @@ static int atyfb_cursor(struct fb_info *info, struct fb_cursor *cursor) for (i = 0; i < height; i++) { for (j = 0; j < width; j++) { + u16 l = 0xaaaa; b = *src++; m = *msk++; switch (cursor->rop) { case ROP_XOR: // Upper 4 bits of mask data - fb_writeb(cursor_bits_lookup[(b ^ m) >> 4], dst++); + l = cursor_bits_lookup[(b ^ m) >> 4] | // Lower 4 bits of mask - fb_writeb(cursor_bits_lookup[(b ^ m) & 0x0f], - dst++); + (cursor_bits_lookup[(b ^ m) & 0x0f] << 8); break; case ROP_COPY: // Upper 4 bits of mask data - fb_writeb(cursor_bits_lookup[(b & m) >> 4], dst++); + l = cursor_bits_lookup[(b & m) >> 4] | // Lower 4 bits of mask - fb_writeb(cursor_bits_lookup[(b & m) & 0x0f], - dst++); + (cursor_bits_lookup[(b & m) & 0x0f] << 8); break; } + /* + * If cursor size is not a multiple of 8 characters + * we must pad it with transparent pattern (0xaaaa). + */ + if ((j + 1) * 8 > cursor->image.width) { + l = comp(l, 0xaaaa, + (1 << ((cursor->image.width & 7) * 2)) - 1); + } + fb_writeb(l & 0xff, dst++); + fb_writeb(l >> 8, dst++); } dst += offset; } |