| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <1344783205-2384-3-git-send-email-dh.herrmann@googlemail.com>
Date: Sun, 12 Aug 2012 16:53:16 +0200
From: David Herrmann <dh.herrmann@...glemail.com>
To: linux-fbdev@...r.kernel.org
Cc: Florian Tobias Schandinat <FlorianSchandinat@....de>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
linux-serial@...r.kernel.org, Alan Cox <alan@...rguk.ukuu.org.uk>,
linux-kernel@...r.kernel.org,
Geert Uytterhoeven <geert@...ux-m68k.org>,
David Herrmann <dh.herrmann@...glemail.com>
Subject: [PATCH 02/11] fbcon: move bit_putcs() into separate source file
If we want to use font-draw-operations in other modules than fbcon, we
need to split this function off of fbcon headers and sources. This also
makes bit_putcs() totally independent of vc_* and fbcon_* structures.
As scr_read() cannot be called inside of non-fbcon/vt functions, we need
to assemble the buffer before passing it to fbdraw_font(). This slows down
this operations a little bit but my rough benchmark showed that it didn't
really matter. Anyway, if it does, we can still put it into VT_BUF_HAVE_RW
conditions so platforms that don't use it won't be affected. And for other
platforms we can add the buffer to the vc-struct so we can reuse it.
Signed-off-by: David Herrmann <dh.herrmann@...glemail.com>
---
drivers/video/console/bitblit.c | 127 ++++------------------------------------
drivers/video/console/fbdraw.c | 125 +++++++++++++++++++++++++++++++++++++++
drivers/video/console/fbdraw.h | 4 ++
3 files changed, 139 insertions(+), 117 deletions(-)
diff --git a/drivers/video/console/bitblit.c b/drivers/video/console/bitblit.c
index 6ec2905..c5d897b 100644
--- a/drivers/video/console/bitblit.c
+++ b/drivers/video/console/bitblit.c
@@ -54,132 +54,25 @@ static void bit_clear(struct vc_data *vc, struct fb_info *info, int sy,
info->fbops->fb_fillrect(info, ®ion);
}
-static inline void bit_putcs_aligned(struct vc_data *vc, struct fb_info *info,
- const u16 *s, u32 attr, u32 cnt,
- u32 d_pitch, u32 s_pitch, u32 cellsize,
- struct fb_image *image, u8 *buf, u8 *dst)
-{
- u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
- u32 idx = vc->vc_font.width >> 3;
- u8 *src;
-
- while (cnt--) {
- src = vc->vc_font.data + (scr_readw(s++)&
- charmask)*cellsize;
-
- if (attr) {
- fbdraw_update_attr(buf, src, attr, &vc->vc_font);
- src = buf;
- }
-
- if (likely(idx == 1))
- __fb_pad_aligned_buffer(dst, d_pitch, src, idx,
- image->height);
- else
- fb_pad_aligned_buffer(dst, d_pitch, src, idx,
- image->height);
-
- dst += s_pitch;
- }
-
- info->fbops->fb_imageblit(info, image);
-}
-
-static inline void bit_putcs_unaligned(struct vc_data *vc,
- struct fb_info *info, const u16 *s,
- u32 attr, u32 cnt, u32 d_pitch,
- u32 s_pitch, u32 cellsize,
- struct fb_image *image, u8 *buf,
- u8 *dst)
-{
- u16 charmask = vc->vc_hi_font_mask ? 0x1ff : 0xff;
- u32 shift_low = 0, mod = vc->vc_font.width % 8;
- u32 shift_high = 8;
- u32 idx = vc->vc_font.width >> 3;
- u8 *src;
-
- while (cnt--) {
- src = vc->vc_font.data + (scr_readw(s++)&
- charmask)*cellsize;
-
- if (attr) {
- fbdraw_update_attr(buf, src, attr, &vc->vc_font);
- src = buf;
- }
-
- fb_pad_unaligned_buffer(dst, d_pitch, src, idx,
- image->height, shift_high,
- shift_low, mod);
- shift_low += mod;
- dst += (shift_low >= 8) ? s_pitch : s_pitch - 1;
- shift_low &= 7;
- shift_high = 8 - shift_low;
- }
-
- info->fbops->fb_imageblit(info, image);
-
-}
-
static void bit_putcs(struct vc_data *vc, struct fb_info *info,
const unsigned short *s, int count, int yy, int xx,
int fg, int bg)
{
- struct fb_image image;
- u32 width = DIV_ROUND_UP(vc->vc_font.width, 8);
- u32 cellsize = width * vc->vc_font.height;
- u32 maxcnt = info->pixmap.size/cellsize;
- u32 scan_align = info->pixmap.scan_align - 1;
- u32 buf_align = info->pixmap.buf_align - 1;
- u32 mod = vc->vc_font.width % 8, cnt, pitch, size;
+ u16 *buf;
+ int i;
u32 attribute = get_attribute(info, scr_readw(s));
- u8 *dst, *buf = NULL;
- image.fg_color = fg;
- image.bg_color = bg;
- image.dx = xx * vc->vc_font.width;
- image.dy = yy * vc->vc_font.height;
- image.height = vc->vc_font.height;
- image.depth = 1;
+ buf = kmalloc(sizeof(*buf) * count, GFP_KERNEL);
+ if (!buf)
+ return;
- if (attribute) {
- buf = kmalloc(cellsize, GFP_KERNEL);
- if (!buf)
- return;
- }
-
- while (count) {
- if (count > maxcnt)
- cnt = maxcnt;
- else
- cnt = count;
-
- image.width = vc->vc_font.width * cnt;
- pitch = DIV_ROUND_UP(image.width, 8) + scan_align;
- pitch &= ~scan_align;
- size = pitch * image.height + buf_align;
- size &= ~buf_align;
- dst = fb_get_buffer_offset(info, &info->pixmap, size);
- image.data = dst;
-
- if (!mod)
- bit_putcs_aligned(vc, info, s, attribute, cnt, pitch,
- width, cellsize, &image, buf, dst);
- else
- bit_putcs_unaligned(vc, info, s, attribute, cnt,
- pitch, width, cellsize, &image,
- buf, dst);
-
- image.dx += cnt * vc->vc_font.width;
- count -= cnt;
- s += cnt;
- }
+ for (i = 0; i < count; ++i)
+ buf[i] = scr_readw(s++);
- /* buf is always NULL except when in monochrome mode, so in this case
- it's a gain to check buf against NULL even though kfree() handles
- NULL pointers just fine */
- if (unlikely(buf))
- kfree(buf);
+ fbdraw_font(info, &vc->vc_font, vc->vc_hi_font_mask, xx, yy, fg, bg,
+ attribute, buf, count);
+ kfree(buf);
}
static void bit_clear_margins(struct vc_data *vc, struct fb_info *info,
diff --git a/drivers/video/console/fbdraw.c b/drivers/video/console/fbdraw.c
index aa18f7e..f7c3da7 100644
--- a/drivers/video/console/fbdraw.c
+++ b/drivers/video/console/fbdraw.c
@@ -41,6 +41,131 @@ void fbdraw_update_attr(u8 *dst, const u8 *src, int attribute,
}
EXPORT_SYMBOL_GPL(fbdraw_update_attr);
+static inline void bit_putcs_aligned(struct fb_info *info, bool hi_font,
+ struct console_font *font, u32 attribute,
+ u32 d_pitch, u32 s_pitch, u32 cellsize,
+ struct fb_image *image, u8 *buf, u8 *dst,
+ const u16 *chars, size_t cnt)
+{
+ u16 charmask = hi_font ? 0x1ff : 0xff;
+ u32 idx = font->width >> 3;
+ u8 *src;
+
+ while (cnt--) {
+ src = font->data + ((*chars++) & charmask) * cellsize;
+
+ if (attribute) {
+ fbdraw_update_attr(buf, src, attribute, font);
+ src = buf;
+ }
+
+ if (likely(idx == 1))
+ __fb_pad_aligned_buffer(dst, d_pitch, src, idx,
+ image->height);
+ else
+ fb_pad_aligned_buffer(dst, d_pitch, src, idx,
+ image->height);
+
+ dst += s_pitch;
+ }
+
+ info->fbops->fb_imageblit(info, image);
+}
+
+static inline void bit_putcs_unaligned(struct fb_info *info, bool hi_font,
+ struct console_font *font, u32 attribute,
+ u32 d_pitch, u32 s_pitch, u32 cellsize,
+ struct fb_image *image, u8 *buf, u8 *dst,
+ const u16 *chars, size_t cnt)
+{
+ u16 charmask = hi_font ? 0x1ff : 0xff;
+ u32 shift_low = 0, mod = font->width % 8;
+ u32 shift_high = 8;
+ u32 idx = font->width >> 3;
+ u8 *src;
+
+ while (cnt--) {
+ src = font->data + ((*chars++) & charmask) * cellsize;
+
+ if (attribute) {
+ fbdraw_update_attr(buf, src, attribute, font);
+ src = buf;
+ }
+
+ fb_pad_unaligned_buffer(dst, d_pitch, src, idx,
+ image->height, shift_high,
+ shift_low, mod);
+ shift_low += mod;
+ dst += (shift_low >= 8) ? s_pitch : s_pitch - 1;
+ shift_low &= 7;
+ shift_high = 8 - shift_low;
+ }
+
+ info->fbops->fb_imageblit(info, image);
+}
+
+void fbdraw_font(struct fb_info *info, struct console_font *font, bool hi_font,
+ unsigned int xpos, unsigned int ypos, int fg, int bg,
+ u32 attribute, const u16 *chars, size_t count)
+{
+ struct fb_image image;
+ u32 width = DIV_ROUND_UP(font->width, 8);
+ u32 cellsize = width * font->height;
+ u32 maxcnt = info->pixmap.size / cellsize;
+ u32 scan_align = info->pixmap.scan_align - 1;
+ u32 buf_align = info->pixmap.buf_align - 1;
+ u32 mod = font->width % 8, cnt, pitch, size;
+ u8 *dst, *buf = NULL;
+
+ image.fg_color = fg;
+ image.bg_color = bg;
+ image.dx = xpos * font->width;
+ image.dy = ypos * font->height;
+ image.height = font->height;
+ image.depth = 1;
+
+ if (attribute) {
+ buf = kmalloc(cellsize, GFP_KERNEL);
+ if (!buf)
+ return;
+ }
+
+ while (count) {
+ if (count > maxcnt)
+ cnt = maxcnt;
+ else
+ cnt = count;
+
+ image.width = font->width * cnt;
+ pitch = DIV_ROUND_UP(image.width, 8) + scan_align;
+ pitch &= ~scan_align;
+ size = pitch * image.height + buf_align;
+ size &= ~buf_align;
+ dst = fb_get_buffer_offset(info, &info->pixmap, size);
+ image.data = dst;
+
+ if (!mod)
+ bit_putcs_aligned(info, hi_font, font, attribute,
+ pitch, width, cellsize, &image, buf,
+ dst, chars, cnt);
+ else
+ bit_putcs_unaligned(info, hi_font, font, attribute,
+ pitch, width, cellsize, &image, buf,
+ dst, chars, cnt);
+
+ image.dx += cnt * font->width;
+ count -= cnt;
+ chars += cnt;
+ }
+
+ /* buf is always NULL except when in monochrome mode, so in this case
+ it's a gain to check buf against NULL even though kfree() handles
+ NULL pointers just fine */
+ if (unlikely(buf))
+ kfree(buf);
+}
+EXPORT_SYMBOL_GPL(fbdraw_font);
+
MODULE_LICENSE("GPL");
MODULE_AUTHOR("David Herrmann <dh.herrmann@...glemail.com>");
MODULE_DESCRIPTION("Framebuffer helpers for image draw-operations");
diff --git a/drivers/video/console/fbdraw.h b/drivers/video/console/fbdraw.h
index 77edd7f..b9f1ffa 100644
--- a/drivers/video/console/fbdraw.h
+++ b/drivers/video/console/fbdraw.h
@@ -23,4 +23,8 @@
void fbdraw_update_attr(u8 *dst, const u8 *src, int attribute,
struct console_font *font);
+void fbdraw_font(struct fb_info *info, struct console_font *font, bool hi_font,
+ unsigned int xpos, unsigned int ypos, int fg, int bg,
+ u32 attribute, const u16 *chars, size_t count);
+
#endif /* _VIDEO_FBDRAW_H */
--
1.7.11.4
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists