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sna: Initialise the per-CRTC shadow bo on first use 

When we create the shadow pixmap for the CRTC, we should copy the
framebuffer contents into the shadow before we show it the first time.
This saves us from showing stale contents until the next redrawn in the
BlockHandler - with the proviso that we can do the copy on the GPU.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
This commit is contained in:
Chris Wilson 2014-09-24 07:54:39 +01:00
parent 1e403716d3
commit fe6ab444ad
1 changed files with 23 additions and 0 deletions
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23
src/sna/sna_display.c
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@ -1872,6 +1872,29 @@ static struct kgem_bo *sna_crtc_attach(xf86CrtcPtr crtc)
return NULL;
}
if (__sna_pixmap_get_bo(sna->front)) {
DrawableRec tmp;
DBG(("%s: copying onto shadow CRTC: (%d, %d), (%d, %d), handle=%d\n",
__FUNCTION__,
crtc->bounds.x1,
crtc->bounds.y1,
crtc->bounds.x2,
crtc->bounds.y2,
bo->handle));
tmp.width = crtc->mode.HDisplay;
tmp.height = crtc->mode.VDisplay;
tmp.depth = sna->front->drawable.depth;
tmp.bitsPerPixel = sna->front->drawable.bitsPerPixel;
(void)sna->render.copy_boxes(sna, GXcopy,
&sna->front->drawable, __sna_pixmap_get_bo(sna->front), 0, 0,
&tmp, bo, -crtc->bounds.x1, -crtc->bounds.y1,
&crtc->bounds, 1,
0);
}
sna_crtc->transform = true;
return bo;
} else {