|
|
d64d53 |
From patchwork Wed Oct 2 13:47:54 2013
|
|
|
d64d53 |
Content-Type: text/plain; charset="utf-8"
|
|
|
d64d53 |
MIME-Version: 1.0
|
|
|
d64d53 |
Content-Transfer-Encoding: 7bit
|
|
|
d64d53 |
Subject: exa: only draw valid trapezoids
|
|
|
d64d53 |
From: Maarten Lankhorst <maarten.lankhorst@canonical.com>
|
|
|
d64d53 |
X-Patchwork-Id: 14769
|
|
|
d64d53 |
Message-Id: <524C240A.9010607@canonical.com>
|
|
|
d64d53 |
To: "X.Org Devel List" <xorg-devel@lists.freedesktop.org>
|
|
|
d64d53 |
Date: Wed, 02 Oct 2013 15:47:54 +0200
|
|
|
d64d53 |
|
|
|
d64d53 |
Fixes freedesktop.org bug https://bugs.freedesktop.org/show_bug.cgi?id=67484
|
|
|
d64d53 |
|
|
|
d64d53 |
If t->bottom is close to MIN_INT, removing top can wraparound, so do the check properly.
|
|
|
d64d53 |
A similar fix should also be applied to pixman.
|
|
|
d64d53 |
|
|
|
d64d53 |
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@canonical.com>
|
|
|
d64d53 |
|
|
|
d64d53 |
---
|
|
|
d64d53 |
|
|
|
d64d53 |
|
|
|
d64d53 |
diff --git a/exa/exa_render.c b/exa/exa_render.c
|
|
|
d64d53 |
index 172e2b5..807eeba 100644
|
|
|
d64d53 |
--- a/exa/exa_render.c
|
|
|
d64d53 |
+++ b/exa/exa_render.c
|
|
|
d64d53 |
@@ -1141,7 +1141,8 @@ exaTrapezoids(CARD8 op, PicturePtr pSrc, PicturePtr pDst,
|
|
|
d64d53 |
|
|
|
d64d53 |
exaPrepareAccess(pPicture->pDrawable, EXA_PREPARE_DEST);
|
|
|
d64d53 |
for (; ntrap; ntrap--, traps++)
|
|
|
d64d53 |
- (*ps->RasterizeTrapezoid) (pPicture, traps, -bounds.x1, -bounds.y1);
|
|
|
d64d53 |
+ if (xTrapezoidValid(traps))
|
|
|
d64d53 |
+ (*ps->RasterizeTrapezoid) (pPicture, traps, -bounds.x1, -bounds.y1);
|
|
|
d64d53 |
exaFinishAccess(pPicture->pDrawable, EXA_PREPARE_DEST);
|
|
|
d64d53 |
|
|
|
d64d53 |
xRel = bounds.x1 + xSrc - xDst;
|
|
|
d64d53 |
diff --git a/render/picture.h b/render/picture.h
|
|
|
d64d53 |
index c85353a..fcd6401 100644
|
|
|
d64d53 |
--- a/render/picture.h
|
|
|
d64d53 |
+++ b/render/picture.h
|
|
|
d64d53 |
@@ -211,7 +211,7 @@ typedef pixman_fixed_t xFixed;
|
|
|
d64d53 |
/* whether 't' is a well defined not obviously empty trapezoid */
|
|
|
d64d53 |
#define xTrapezoidValid(t) ((t)->left.p1.y != (t)->left.p2.y && \
|
|
|
d64d53 |
(t)->right.p1.y != (t)->right.p2.y && \
|
|
|
d64d53 |
- (int) ((t)->bottom - (t)->top) > 0)
|
|
|
d64d53 |
+ ((t)->bottom > (t)->top))
|
|
|
d64d53 |
|
|
|
d64d53 |
/*
|
|
|
d64d53 |
* Standard NTSC luminance conversions:
|