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Handle transform failure when computing shadow damage area. 

PictureTransformBounds can fail, when this happens, damage the entire screen
so that the shadow gets repainted correctly.
This commit is contained in:
Keith Packard 2008-04-29 08:29:42 -07:00
parent 9c7679240a
commit c4b9ab6bf5
3 changed files with 35 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

49
hw/xfree86/modes/xf86Rotate.c
View File

@ -134,25 +134,6 @@ xf86RotateCrtcRedisplay (xf86CrtcPtr crtc, RegionPtr region)
FreePicture (dst, None);
}
static void
xf86CrtcDamageShadow (xf86CrtcPtr crtc)
{
ScrnInfoPtr pScrn = crtc->scrn;
BoxRec damage_box;
RegionRec damage_region;
ScreenPtr pScreen = pScrn->pScreen;
damage_box.x1 = 0;
damage_box.x2 = crtc->mode.HDisplay;
damage_box.y1 = 0;
damage_box.y2 = crtc->mode.VDisplay;
PictureTransformBounds (&damage_box, &crtc->crtc_to_framebuffer);
REGION_INIT (pScreen, &damage_region, &damage_box, 1);
DamageRegionAppend(&(*pScreen->GetScreenPixmap)(pScreen)->drawable,
&damage_region);
REGION_UNINIT (pScreen, &damage_region);
}
static void
xf86CrtcShadowClear (xf86CrtcPtr crtc)
{
@ -184,6 +165,36 @@ xf86CrtcShadowClear (xf86CrtcPtr crtc)
FreePicture (dst, None);
}
static void
xf86CrtcDamageShadow (xf86CrtcPtr crtc)
{
ScrnInfoPtr pScrn = crtc->scrn;
BoxRec damage_box;
RegionRec damage_region;
ScreenPtr pScreen = pScrn->pScreen;
damage_box.x1 = 0;
damage_box.x2 = crtc->mode.HDisplay;
damage_box.y1 = 0;
damage_box.y2 = crtc->mode.VDisplay;
if (!PictureTransformBounds (&damage_box, &crtc->crtc_to_framebuffer))
{
damage_box.x1 = 0;
damage_box.y1 = 0;
damage_box.x2 = pScreen->width;
damage_box.y2 = pScreen->height;
}
if (damage_box.x1 < 0) damage_box.x1 = 0;
if (damage_box.y1 < 0) damage_box.y1 = 0;
if (damage_box.x2 > pScreen->width) damage_box.x2 = pScreen->width;
if (damage_box.y2 > pScreen->height) damage_box.y2 = pScreen->height;
REGION_INIT (pScreen, &damage_region, &damage_box, 1);
DamageRegionAppend (&(*pScreen->GetScreenPixmap)(pScreen)->drawable,
&damage_region);
REGION_UNINIT (pScreen, &damage_region);
xf86CrtcShadowClear (crtc);
}
static void
xf86RotatePrepare (ScreenPtr pScreen)
{

7
render/matrix.c
View File

@ -84,7 +84,6 @@ _X_EXPORT Bool
PictureTransformPoint (PictTransformPtr transform,
PictVectorPtr vector)
{
PictVector result;
int i, j;
xFixed_32_32 partial;
xFixed_34_30 v[3];
@ -227,7 +226,7 @@ PictureTransformTranslate (PictTransformPtr forward,
return TRUE;
}
_X_EXPORT void
_X_EXPORT Bool
PictureTransformBounds (BoxPtr b, PictTransformPtr matrix)
{
PictVector v[4];
@ -240,7 +239,8 @@ PictureTransformBounds (BoxPtr b, PictTransformPtr matrix)
v[3].vector[0] = F (b->x1); v[3].vector[1] = F (b->y2); v[3].vector[2] = F(1);
for (i = 0; i < 4; i++)
{
PictureTransformPoint (matrix, &v[i]);
if (!PictureTransformPoint (matrix, &v[i]))
return FALSE;
x1 = xFixedToInt (v[i].vector[0]);
y1 = xFixedToInt (v[i].vector[1]);
x2 = xFixedToInt (xFixedCeil (v[i].vector[0]));
@ -258,6 +258,7 @@ PictureTransformBounds (BoxPtr b, PictTransformPtr matrix)
if (y2 > b->y2) b->y2 = y2;
}
}
return TRUE;
}
_X_EXPORT Bool

2
render/picturestr.h
View File

@ -724,7 +724,7 @@ PictureTransformTranslate (PictTransformPtr forward,
PictTransformPtr reverse,
xFixed tx, xFixed ty);
void
Bool
PictureTransformBounds (BoxPtr b, PictTransformPtr matrix);
Bool