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authorAntonino A. Daplas <adaplas@gmail.com>2005-11-07 01:00:39 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2005-11-07 07:53:51 -0800
commitb4d8aea6d66aabc1d79aaeb1ecc90562abb8f575 (patch)
tree9d1acb46481ba54827463ae2d8f79821d5119953 /drivers/video/cfbimgblt.c
parentdd0314f7bb407bc4bdb3ea769b9c8a3a5d39ffd7 (diff)
[PATCH] fbdev: Remove software clipping from drawing functions
Remove software clipping from imageblit, fillrect and copyarea. Clipping is not needed because the console layer assures that reads/writes doest not happen beyond the extents of the framebuffer. And software clipping tends to hide bugs, if they do exist. Signed-off-by: Antonino Daplas <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/video/cfbimgblt.c')
-rw-r--r--drivers/video/cfbimgblt.c22
1 files changed, 1 insertions, 21 deletions
diff --git a/drivers/video/cfbimgblt.c b/drivers/video/cfbimgblt.c
index 4c123abaa84..da664cea7ec 100644
--- a/drivers/video/cfbimgblt.c
+++ b/drivers/video/cfbimgblt.c
@@ -272,33 +272,13 @@ void cfb_imageblit(struct fb_info *p, const struct fb_image *image)
{
u32 fgcolor, bgcolor, start_index, bitstart, pitch_index = 0;
u32 bpl = sizeof(u32), bpp = p->var.bits_per_pixel;
- u32 width = image->width, height = image->height;
+ u32 width = image->width;
u32 dx = image->dx, dy = image->dy;
- int x2, y2, vxres, vyres;
u8 __iomem *dst1;
if (p->state != FBINFO_STATE_RUNNING)
return;
- vxres = p->var.xres_virtual;
- vyres = p->var.yres_virtual;
- /*
- * We could use hardware clipping but on many cards you get around
- * hardware clipping by writing to framebuffer directly like we are
- * doing here.
- */
- if (image->dx > vxres || image->dy > vyres)
- return;
-
- x2 = image->dx + image->width;
- y2 = image->dy + image->height;
- dx = image->dx > 0 ? image->dx : 0;
- dy = image->dy > 0 ? image->dy : 0;
- x2 = x2 < vxres ? x2 : vxres;
- y2 = y2 < vyres ? y2 : vyres;
- width = x2 - dx;
- height = y2 - dy;
-
bitstart = (dy * p->fix.line_length * 8) + (dx * bpp);
start_index = bitstart & (32 - 1);
pitch_index = (p->fix.line_length & (bpl - 1)) * 8;