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r300: Fix cliprect emit 

This makes our handling of cliprects sane. drm_clip_rect always has exclusiv
bottom-right corners, but the hardware expects inclusive bottom-right corner
so we adjust this here.

This complements Michel Daenzer's commit 57aea290e1e0a26d1e74df6cff777eb9f03
to Mesa. See also http://bugs.freedesktop.org/show_bug.cgi?id=16123

Signed-off-by: Dave Airlie <airlied@redhat.com>
This commit is contained in:
Nicolai Haehnle 2008-08-13 09:50:12 +10:00 committed by Dave Airlie
parent e2898c5fdd
commit 649ffc06a6
1 changed files with 4 additions and 1 deletions
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5
drivers/gpu/drm/radeon/r300_cmdbuf.c
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@ -77,6 +77,9 @@ static int r300_emit_cliprects(drm_radeon_private_t *dev_priv,
return -EFAULT;
}
box.x2--; /* Hardware expects inclusive bottom-right corner */
box.y2--;
if ((dev_priv->flags & RADEON_FAMILY_MASK) >= CHIP_RV515) {
box.x1 = (box.x1) &
R300_CLIPRECT_MASK;
@ -95,8 +98,8 @@ static int r300_emit_cliprects(drm_radeon_private_t *dev_priv,
R300_CLIPRECT_MASK;
box.y2 = (box.y2 + R300_CLIPRECT_OFFSET) &
R300_CLIPRECT_MASK;
}
OUT_RING((box.x1 << R300_CLIPRECT_X_SHIFT) |
(box.y1 << R300_CLIPRECT_Y_SHIFT));
OUT_RING((box.x2 << R300_CLIPRECT_X_SHIFT) |