static void
glamor_copy_bail(DrawablePtr src,
                 DrawablePtr dst,
                 GCPtr gc,
                 BoxPtr box,
                 int nbox,
                 int dx,
                 int dy,
                 Bool reverse,
                 Bool upsidedown,
                 Pixel bitplane,
                 void *closure)
{
    if (glamor_prepare_access(dst, GLAMOR_ACCESS_RW) && glamor_prepare_access(src, GLAMOR_ACCESS_RO)) {
        if (bitplane) {
            if (src->bitsPerPixel > 1)
                fbCopyNto1(src, dst, gc, box, nbox, dx, dy,
                           reverse, upsidedown, bitplane, closure);
            else
                fbCopy1toN(src, dst, gc, box, nbox, dx, dy,
                           reverse, upsidedown, bitplane, closure);
        } else {
            fbCopyNtoN(src, dst, gc, box, nbox, dx, dy,
                       reverse, upsidedown, bitplane, closure);
        }
    }
    glamor_finish_access(dst);
    glamor_finish_access(src);
}
Example #2
0
void
kaaCopyNtoN (DrawablePtr    pSrcDrawable,
	     DrawablePtr    pDstDrawable,
	     GCPtr	    pGC,
	     BoxPtr	    pbox,
	     int	    nbox,
	     int	    dx,
	     int	    dy,
	     Bool	    reverse,
	     Bool	    upsidedown,
	     Pixel	    bitplane,
	     void	    *closure)
{
    KdScreenPriv (pDstDrawable->pScreen);
    KaaScreenPriv (pDstDrawable->pScreen);
    PixmapPtr pSrcPixmap, pDstPixmap;
    int	    src_off_x, src_off_y;
    int	    dst_off_x, dst_off_y;

    /* Migrate pixmaps to same place as destination */
    if (pScreenPriv->enabled && pSrcDrawable->type == DRAWABLE_PIXMAP) {
	if (kaaDrawableIsOffscreen (pDstDrawable))
	    kaaPixmapUseScreen ((PixmapPtr) pSrcDrawable);
	else
	    kaaPixmapUseMemory ((PixmapPtr) pSrcDrawable);
    }

    if (pScreenPriv->enabled &&
	(pSrcPixmap = kaaGetOffscreenPixmap (pSrcDrawable, &src_off_x, &src_off_y)) &&
	(pDstPixmap = kaaGetOffscreenPixmap (pDstDrawable, &dst_off_x, &dst_off_y)) && 
	(*pKaaScr->info->PrepareCopy) (pSrcPixmap,
				       pDstPixmap,
				       dx,
				       dy,
				       pGC ? pGC->alu : GXcopy,
				       pGC ? pGC->planemask : FB_ALLONES))
    {
	while (nbox--)
	{
	    (*pKaaScr->info->Copy) (pbox->x1 + dx + src_off_x,
				    pbox->y1 + dy + src_off_y,
				    pbox->x1 + dst_off_x, pbox->y1 + dst_off_y,
				    pbox->x2 - pbox->x1,
				    pbox->y2 - pbox->y1);
	    pbox++;
	}
	(*pKaaScr->info->DoneCopy) ();
	kaaMarkSync (pDstDrawable->pScreen);
    }
    else
    {
	kaaWaitSync (pDstDrawable->pScreen);
	fbCopyNtoN (pSrcDrawable, pDstDrawable, pGC, 
		    pbox, nbox, dx, dy, reverse, upsidedown, 
		    bitplane, closure);
    }
    kaaDrawableDirty (pDstDrawable);
}
void vivante_unaccel_CopyNtoN(DrawablePtr pSrc, DrawablePtr pDst, GCPtr pGC,
	BoxPtr pBox, int nBox, int dx, int dy, Bool reverse, Bool upsidedown,
	Pixel bitPlane, void *closure)
{
	vivante_prepare_drawable(pDst, ACCESS_RW);
	if (pDst != pSrc)
		vivante_prepare_drawable(pSrc, ACCESS_RO);
	fbCopyNtoN(pSrc, pDst, pGC, pBox, nBox, dx, dy, reverse, upsidedown,
			   bitPlane, closure);
	if (pDst != pSrc)
		vivante_finish_drawable(pSrc, ACCESS_RO);
	vivante_finish_drawable(pDst, ACCESS_RW);
}
Example #4
0
static Bool
_glamor_copy_n_to_n(DrawablePtr src,
		    DrawablePtr dst,
		    GCPtr gc,
		    BoxPtr box,
		    int nbox,
		    int dx,
		    int dy,
		    Bool reverse,
		    Bool upsidedown, Pixel bitplane,
		    void *closure, Bool fallback)
{
	PixmapPtr dst_pixmap, src_pixmap;
	glamor_pixmap_private *dst_pixmap_priv, *src_pixmap_priv;
	glamor_screen_private *glamor_priv;
	glamor_gl_dispatch *dispatch;
	BoxPtr extent;
	RegionRec region;
	int src_x_off, src_y_off, dst_x_off, dst_y_off;
	Bool ok = FALSE;
	int force_clip = 0;

	if (nbox == 0)
		return TRUE;
	dst_pixmap = glamor_get_drawable_pixmap(dst);
	dst_pixmap_priv = glamor_get_pixmap_private(dst_pixmap);
	src_pixmap = glamor_get_drawable_pixmap(src);
	src_pixmap_priv = glamor_get_pixmap_private(src_pixmap);

	glamor_priv = glamor_get_screen_private(dst->pScreen);

	DEBUGF("Copy %d %d %dx%d dx %d dy %d from %p to %p \n",
		box[0].x1, box[0].y1,
		box[0].x2 - box[0].x1, box[0].y2 - box[0].y1,
		dx, dy,
		src_pixmap, dst_pixmap);

	if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(dst_pixmap_priv))
		goto fall_back;

	if (gc) {
		if (!glamor_set_planemask(dst_pixmap, gc->planemask))
			goto fall_back;
		dispatch = glamor_get_dispatch(glamor_priv);
		if (!glamor_set_alu(dispatch, gc->alu)) {
			glamor_put_dispatch(glamor_priv);
			goto fail_noregion;
		}
		glamor_put_dispatch(glamor_priv);
	}

	if (!src_pixmap_priv) {
		glamor_set_pixmap_type(src_pixmap, GLAMOR_MEMORY);
		src_pixmap_priv = glamor_get_pixmap_private(src_pixmap);
	}

	glamor_get_drawable_deltas(src, src_pixmap, &src_x_off,
				   &src_y_off);
	glamor_get_drawable_deltas(dst, dst_pixmap, &dst_x_off,
				   &dst_y_off);

	RegionInitBoxes(&region, box, nbox);
	extent = RegionExtents(&region);

	if (!glamor_check_fbo_size(glamor_priv,
		extent->x2 - extent->x1, extent->y2 - extent->y1)
	   && (src_pixmap_priv->type == GLAMOR_MEMORY
		|| (src_pixmap_priv == dst_pixmap_priv))) {
		force_clip = 1;
	}

	if (force_clip || dst_pixmap_priv->type == GLAMOR_TEXTURE_LARGE
	    || src_pixmap_priv->type == GLAMOR_TEXTURE_LARGE) {
			glamor_pixmap_clipped_regions *clipped_dst_regions;
			int n_dst_region, i, j;
			PixmapPtr temp_source_pixmap;
			glamor_pixmap_private *temp_source_priv = NULL;

			RegionTranslate(&region, dst_x_off, dst_y_off);
			if (!force_clip)
				clipped_dst_regions = glamor_compute_clipped_regions(dst_pixmap_priv,
										     &region, &n_dst_region, 0,
										     reverse, upsidedown);
			else
				clipped_dst_regions = glamor_compute_clipped_regions_ext(dst_pixmap_priv,
										         &region, &n_dst_region,
											 glamor_priv->max_fbo_size,
											 glamor_priv->max_fbo_size,
											 reverse, upsidedown);
			for(i = 0; i < n_dst_region; i++)
			{
				int n_src_region;
				glamor_pixmap_clipped_regions *clipped_src_regions;
				BoxPtr current_boxes;
				int n_current_boxes;

				SET_PIXMAP_FBO_CURRENT(dst_pixmap_priv, clipped_dst_regions[i].block_idx);

				temp_source_pixmap = NULL;
				if (src_pixmap_priv->type == GLAMOR_TEXTURE_LARGE) {
					RegionTranslate(clipped_dst_regions[i].region,
							-dst_x_off + src_x_off + dx, -dst_y_off + src_y_off + dy);
					clipped_src_regions = glamor_compute_clipped_regions(src_pixmap_priv,
											     clipped_dst_regions[i].region,
											     &n_src_region, 0,
											     reverse, upsidedown);
					DEBUGF("Source is large pixmap.\n");
					for (j = 0; j < n_src_region; j++)
					{
						if (src_pixmap_priv != dst_pixmap_priv)
							SET_PIXMAP_FBO_CURRENT(src_pixmap_priv, clipped_src_regions[j].block_idx);
						else if (src_pixmap_priv == dst_pixmap_priv &&
						    clipped_src_regions[j].block_idx != clipped_dst_regions[i].block_idx) {
							/* source and the dest are the same, but need different block_idx.
							 * we create a empty pixmap and fill the required source fbo and box to
							 * it. It's a little hacky, but avoid extra copy. */
							temp_source_pixmap = glamor_create_pixmap(src->pScreen, 0, 0,
												  src->depth, 0);
							if (!temp_source_pixmap) {
								ok = FALSE;
								goto fail;
							}
							src->pScreen->ModifyPixmapHeader(temp_source_pixmap,
										      src_pixmap->drawable.width,
										      src_pixmap->drawable.height,
										      0, 0, src_pixmap->devKind, NULL);
							temp_source_priv = glamor_get_pixmap_private(temp_source_pixmap);
							*temp_source_priv = *src_pixmap_priv;
							temp_source_priv->large.box = src_pixmap_priv->large.box_array[clipped_src_regions[j].block_idx];
							temp_source_priv->base.fbo = src_pixmap_priv->large.fbo_array[clipped_src_regions[j].block_idx];
							temp_source_priv->base.pixmap = temp_source_pixmap;
						}
						assert(temp_source_pixmap || !(src_pixmap_priv == dst_pixmap_priv
							&& (clipped_src_regions[j].block_idx != clipped_dst_regions[i].block_idx)));

						RegionTranslate(clipped_src_regions[j].region,
								-src_x_off - dx,
								-src_y_off - dy);
						current_boxes = RegionRects(clipped_src_regions[j].region);
						n_current_boxes = RegionNumRects(clipped_src_regions[j].region);
						DEBUGF("dst pixmap fbo idx %d src pixmap fbo idx %d \n",
							clipped_dst_regions[i].block_idx,
							clipped_src_regions[j].block_idx);
						DEBUGF("Copy %d %d %d %d dx %d dy %d from %p to %p \n",
							current_boxes[0].x1, current_boxes[0].y1,
							current_boxes[0].x2, current_boxes[0].y2,
							dx, dy, src_pixmap, dst_pixmap);
						if (!temp_source_pixmap)
							ok = __glamor_copy_n_to_n(src, dst, gc, current_boxes,
										  n_current_boxes, dx, dy, reverse,
										  upsidedown, bitplane, closure);
						else {
							ok = __glamor_copy_n_to_n(&temp_source_pixmap->drawable,
										  dst, gc, current_boxes,
										  n_current_boxes, dx, dy, reverse,
										  upsidedown, bitplane, closure);
							temp_source_priv->type = GLAMOR_MEMORY;
							temp_source_priv->base.fbo = NULL;
							glamor_destroy_pixmap(temp_source_pixmap);
							temp_source_pixmap = NULL;
						}

						RegionDestroy(clipped_src_regions[j].region);
						if (!ok) {
							assert(0);
							goto fail;
						}
					}

					if (n_src_region == 0)
						ok = TRUE;
					free(clipped_src_regions);
				} else {
					RegionTranslate(clipped_dst_regions[i].region,
							- dst_x_off,
							- dst_y_off);
					current_boxes = RegionRects(clipped_dst_regions[i].region);
					n_current_boxes = RegionNumRects(clipped_dst_regions[i].region);

						DEBUGF("dest pixmap fbo idx %d \n",
							clipped_dst_regions[i].block_idx);
						DEBUGF("Copy %d %d %d %d dx %d dy %d from %p to %p \n",
							current_boxes[0].x1, current_boxes[0].y1,
							current_boxes[0].x2, current_boxes[0].y2,
							dx, dy, src_pixmap, dst_pixmap);

					ok = __glamor_copy_n_to_n(src, dst, gc, current_boxes,
								  n_current_boxes, dx, dy, reverse,
								  upsidedown, bitplane, closure);

				}
				RegionDestroy(clipped_dst_regions[i].region);
			}
		if (n_dst_region == 0)
			ok = TRUE;
		free(clipped_dst_regions);
	} else {
		ok = __glamor_copy_n_to_n(src, dst, gc, box, nbox, dx, dy,
					  reverse, upsidedown, bitplane,
					  closure);
	}

fail:
	RegionUninit(&region);
fail_noregion:
	dispatch = glamor_get_dispatch(glamor_priv);
	glamor_set_alu(dispatch, GXcopy);
	glamor_put_dispatch(glamor_priv);

	if (ok)
		return TRUE;
fall_back:
	if (!fallback
	    && glamor_ddx_fallback_check_pixmap(src)
	    && glamor_ddx_fallback_check_pixmap(dst))
		goto done;

	if (src_pixmap_priv->type == GLAMOR_DRM_ONLY
	    || dst_pixmap_priv->type == GLAMOR_DRM_ONLY) {
		LogMessage(X_WARNING,
			   "Access a DRM only pixmap is not allowed within glamor.\n");
		return TRUE;
	}
	glamor_report_delayed_fallbacks(src->pScreen);
	glamor_report_delayed_fallbacks(dst->pScreen);

	glamor_fallback("from %p to %p (%c,%c)\n", src, dst,
			glamor_get_drawable_location(src),
			glamor_get_drawable_location(dst));

	if (glamor_prepare_access(dst, GLAMOR_ACCESS_RW) &&
	    glamor_prepare_access(src, GLAMOR_ACCESS_RO) &&
	    glamor_prepare_access_gc(gc)) {
		fbCopyNtoN(src, dst, gc, box, nbox,
			   dx, dy, reverse, upsidedown, bitplane, closure);
	}
	glamor_finish_access_gc(gc);
	glamor_finish_access(src);
	glamor_finish_access(dst);
	ok = TRUE;

      done:
	glamor_clear_delayed_fallbacks(src->pScreen);
	glamor_clear_delayed_fallbacks(dst->pScreen);
	return ok;
}
Example #5
0
static Bool
__glamor_copy_n_to_n(DrawablePtr src,
		     DrawablePtr dst,
		     GCPtr gc,
		     BoxPtr box,
		     int nbox,
		     int dx,
		     int dy,
		     Bool reverse,
		     Bool upsidedown, Pixel bitplane,
		     void *closure)
{
	PixmapPtr dst_pixmap, src_pixmap, temp_pixmap = NULL;
	DrawablePtr temp_src = src;
	glamor_pixmap_private *dst_pixmap_priv, *src_pixmap_priv;
	glamor_screen_private *glamor_priv;
	BoxRec bound;
	ScreenPtr screen;
	int temp_dx = dx;
	int temp_dy = dy;
	int src_x_off, src_y_off, dst_x_off, dst_y_off;
	int i;
	int overlaped = 0;
	Bool ret = FALSE;

	dst_pixmap = glamor_get_drawable_pixmap(dst);
	dst_pixmap_priv = glamor_get_pixmap_private(dst_pixmap);
	src_pixmap = glamor_get_drawable_pixmap(src);
	src_pixmap_priv = glamor_get_pixmap_private(src_pixmap);
	screen = dst_pixmap->drawable.pScreen;
	glamor_priv = glamor_get_screen_private(dst->pScreen);
	glamor_get_drawable_deltas(src, src_pixmap, &src_x_off,
				   &src_y_off);

	glamor_get_drawable_deltas(dst, dst_pixmap, &dst_x_off,
				   &dst_y_off);

	if (src_pixmap_priv->base.fbo
		&& src_pixmap_priv->base.fbo->fb == dst_pixmap_priv->base.fbo->fb) {
		int x_shift = abs(src_x_off - dx - dst_x_off);
		int y_shift = abs(src_y_off - dy - dst_y_off);
		for (i = 0; i < nbox; i++) {
			if (x_shift < abs(box[i].x2 - box[i].x1)
			    && y_shift < abs(box[i].y2 - box[i].y1)) {
				overlaped = 1;
				break;
			}
		}
	}
	DEBUGF("Copy %d %d %dx%d dx %d dy %d from %p to %p \n",
		box[0].x1, box[0].y1,
		box[0].x2 - box[0].x1, box[0].y2 - box[0].y1,
		dx, dy,
		src_pixmap, dst_pixmap);
#ifndef GLAMOR_GLES2
	if (!overlaped &&
	    (glamor_priv->state != RENDER_STATE
	     || !src_pixmap_priv->base.gl_tex || !dst_pixmap_priv->base.gl_tex)
	    && glamor_copy_n_to_n_fbo_blit(src, dst, gc, box, nbox, dx,
					   dy)) {
		ret = TRUE;
		goto done;
	}
#endif
	glamor_calculate_boxes_bound(&bound, box, nbox);

	/*  Overlaped indicate the src and dst are the same pixmap. */
	if (overlaped || (!GLAMOR_PIXMAP_PRIV_HAS_FBO(src_pixmap_priv)
			  && (((bound.x2 - bound.x1) * (bound.y2 - bound.y1)
			      * 4 >
			      src_pixmap->drawable.width *
			      src_pixmap->drawable.height)
				|| !(glamor_check_fbo_size(glamor_priv,
					src_pixmap->drawable.width,
					src_pixmap->drawable.height))))) {

		temp_pixmap = glamor_create_pixmap(screen,
						   bound.x2 - bound.x1,
						   bound.y2 - bound.y1,
						   src_pixmap->
						   drawable.depth,
						   overlaped ? 0 :
						   GLAMOR_CREATE_PIXMAP_CPU);
		assert(bound.x2 - bound.x1 <= glamor_priv->max_fbo_size);
		assert(bound.y2 - bound.y1 <= glamor_priv->max_fbo_size);
		if (!temp_pixmap)
			goto done;
		glamor_translate_boxes(box, nbox, -bound.x1, -bound.y1);
		temp_src = &temp_pixmap->drawable;

		if (overlaped)
			glamor_copy_n_to_n_textured(src, temp_src, gc, box,
						    nbox,
						    temp_dx + bound.x1,
						    temp_dy + bound.y1);
		else
			fbCopyNtoN(src, temp_src, gc, box, nbox,
				   temp_dx + bound.x1, temp_dy + bound.y1,
				   reverse, upsidedown, bitplane, closure);
		glamor_translate_boxes(box, nbox, bound.x1, bound.y1);
		temp_dx = -bound.x1;
		temp_dy = -bound.y1;
	} else {
		temp_dx = dx;
		temp_dy = dy;
		temp_src = src;
	}

	if (glamor_copy_n_to_n_textured
	    (temp_src, dst, gc, box, nbox, temp_dx, temp_dy)) {
		ret = TRUE;
	}
done:
	if (temp_src != src)
		glamor_destroy_pixmap(temp_pixmap);
	return ret;
}
Example #6
0
void
uxa_copy_n_to_n(DrawablePtr pSrcDrawable,
		DrawablePtr pDstDrawable,
		GCPtr pGC,
		BoxPtr pbox,
		int nbox,
		int dx,
		int dy,
		Bool reverse, Bool upsidedown, Pixel bitplane, void *closure)
{
	ScreenPtr screen = pDstDrawable->pScreen;
	uxa_screen_t *uxa_screen = uxa_get_screen(screen);
	int src_off_x, src_off_y;
	int dst_off_x, dst_off_y;
	PixmapPtr pSrcPixmap, pDstPixmap;

	if (uxa_screen->info->flags & UXA_USE_GLAMOR) {
		int ok = 0;

		if (uxa_prepare_access(pSrcDrawable, UXA_GLAMOR_ACCESS_RO)) {
			if (uxa_prepare_access(pDstDrawable, UXA_GLAMOR_ACCESS_RW)) {
				ok = glamor_copy_n_to_n_nf(pSrcDrawable, pDstDrawable,
							   pGC, pbox, nbox, dx, dy,
							   reverse, upsidedown, bitplane,
							   closure);
				uxa_finish_access(pDstDrawable, UXA_GLAMOR_ACCESS_RW);
			}
			uxa_finish_access(pSrcDrawable, UXA_GLAMOR_ACCESS_RO);
		}

		if (!ok)
			goto fallback;

		return;
	}

	if (uxa_screen->force_fallback)
		goto fallback;

	pSrcPixmap = uxa_get_drawable_pixmap(pSrcDrawable);
	pDstPixmap = uxa_get_drawable_pixmap(pDstDrawable);
	if (!pSrcPixmap || !pDstPixmap)
		goto fallback;

	if (uxa_screen->info->check_copy &&
	    !uxa_screen->info->check_copy(pSrcPixmap, pDstPixmap,
					  pGC ? pGC->alu : GXcopy,
					  pGC ? pGC->planemask : FB_ALLONES))
		goto fallback;

	uxa_get_drawable_deltas(pSrcDrawable, pSrcPixmap, &src_off_x,
				&src_off_y);
	uxa_get_drawable_deltas(pDstDrawable, pDstPixmap, &dst_off_x,
				&dst_off_y);

	/* Mixed directions must be handled specially if the card is lame */
	if ((uxa_screen->info->flags & UXA_TWO_BITBLT_DIRECTIONS) &&
	    reverse != upsidedown) {
		if (uxa_copy_n_to_n_two_dir
		    (pSrcDrawable, pDstDrawable, pGC, pbox, nbox, dx, dy))
			return;
		goto fallback;
	}

	if (!uxa_pixmap_is_offscreen(pDstPixmap)) {
		int stride, bpp;
		char *dst;

		if (!uxa_pixmap_is_offscreen(pSrcPixmap))
			goto fallback;

		if (!uxa_screen->info->get_image)
			goto fallback;

		/* Don't bother with under 8bpp, XYPixmaps. */
		bpp = pSrcPixmap->drawable.bitsPerPixel;
		if (bpp != pDstDrawable->bitsPerPixel || bpp < 8)
			goto fallback;

		/* Only accelerate copies: no rop or planemask. */
		if (pGC && (!UXA_PM_IS_SOLID(pSrcDrawable, pGC->planemask) || pGC->alu != GXcopy))
			goto fallback;

		dst = pDstPixmap->devPrivate.ptr;
		stride = pDstPixmap->devKind;
		bpp /= 8;
		while (nbox--) {
			if (!uxa_screen->info->get_image(pSrcPixmap,
							 pbox->x1 + dx + src_off_x,
							 pbox->y1 + dy + src_off_y,
							 pbox->x2 - pbox->x1,
							 pbox->y2 - pbox->y1,
							 (char *) dst +
							 (pbox->y1 + dst_off_y) * stride +
							 (pbox->x1 + dst_off_x) * bpp,
							 stride))
				goto fallback;

			pbox++;
		}

		return;
	}

	if (uxa_pixmap_is_offscreen(pSrcPixmap)) {
	    if (!(*uxa_screen->info->prepare_copy) (pSrcPixmap, pDstPixmap,
						reverse ? -1 : 1,
						upsidedown ? -1 : 1,
						pGC ? pGC->alu : GXcopy,
						pGC ? pGC->
						planemask : FB_ALLONES))
		goto fallback;

	    while (nbox--) {
		(*uxa_screen->info->copy) (pDstPixmap,
					   pbox->x1 + dx + src_off_x,
					   pbox->y1 + dy + src_off_y,
					   pbox->x1 + dst_off_x,
					   pbox->y1 + dst_off_y,
					   pbox->x2 - pbox->x1,
					   pbox->y2 - pbox->y1);
		pbox++;
	    }

	    (*uxa_screen->info->done_copy) (pDstPixmap);
	} else {
	    int stride, bpp;
	    char *src;

	    if (!uxa_screen->info->put_image)
		goto fallback;

	    /* Don't bother with under 8bpp, XYPixmaps. */
	    bpp = pSrcPixmap->drawable.bitsPerPixel;
	    if (bpp != pDstDrawable->bitsPerPixel || bpp < 8)
		goto fallback;

	    /* Only accelerate copies: no rop or planemask. */
	    if (pGC && (!UXA_PM_IS_SOLID(pSrcDrawable, pGC->planemask) || pGC->alu != GXcopy))
		goto fallback;

	    src = pSrcPixmap->devPrivate.ptr;
	    stride = pSrcPixmap->devKind;
	    bpp /= 8;
	    while (nbox--) {
		if (!uxa_screen->info->put_image(pDstPixmap,
						 pbox->x1 + dst_off_x,
						 pbox->y1 + dst_off_y,
						 pbox->x2 - pbox->x1,
						 pbox->y2 - pbox->y1,
						 (char *) src +
						 (pbox->y1 + dy + src_off_y) * stride +
						 (pbox->x1 + dx + src_off_x) * bpp,
						 stride))
		    goto fallback;

		pbox++;
	    }
	}

	return;

fallback:
	UXA_FALLBACK(("from %p to %p (%c,%c)\n", pSrcDrawable, pDstDrawable,
		      uxa_drawable_location(pSrcDrawable),
		      uxa_drawable_location(pDstDrawable)));
	if (uxa_prepare_access(pDstDrawable, UXA_ACCESS_RW)) {
		if (pSrcDrawable == pDstDrawable ||
		    uxa_prepare_access(pSrcDrawable, UXA_ACCESS_RO)) {
			fbCopyNtoN(pSrcDrawable, pDstDrawable, pGC, pbox, nbox,
				   dx, dy, reverse, upsidedown, bitplane,
				   closure);
			if (pSrcDrawable != pDstDrawable)
				uxa_finish_access(pSrcDrawable, UXA_ACCESS_RO);
		}
		uxa_finish_access(pDstDrawable, UXA_ACCESS_RW);
	}
}