path: root/xorg-server/glamor/glamor_largepixmap.c

#include <stdlib.h>

#include "glamor_priv.h"

/**
 * Clip the boxes regards to each pixmap's block array.
 *
 * Should translate the region to relative coords to the pixmap,
 * start at (0,0).
 */
#if 0
//#define DEBUGF(str, ...)  do {} while(0)
#define DEBUGF(str, ...) ErrorF(str, ##__VA_ARGS__)
//#define DEBUGRegionPrint(x) do {} while (0)
#define DEBUGRegionPrint RegionPrint
#endif

static glamor_pixmap_clipped_regions *
__glamor_compute_clipped_regions(int block_w,
			       int block_h,
			       int block_stride,
			       int x, int y,
			       int w, int h,
                               RegionPtr region,
                               int *n_region,
			       int reverse,
			       int upsidedown)
{
	glamor_pixmap_clipped_regions * clipped_regions;
	BoxPtr extent;
	int start_x, start_y, end_x, end_y;
	int start_block_x, start_block_y;
	int end_block_x, end_block_y;
	int loop_start_block_x, loop_start_block_y;
	int loop_end_block_x, loop_end_block_y;
	int loop_block_stride;
	int i, j, delta_i, delta_j;
	RegionRec temp_region;
	RegionPtr current_region;
	int block_idx;
	int k = 0;
	int temp_block_idx;

	extent = RegionExtents(region);
	start_x = MAX(x, extent->x1);
	start_y = MAX(y, extent->y1);
	end_x = MIN(x + w, extent->x2);
	end_y = MIN(y + h, extent->y2);

	DEBUGF("start compute clipped regions:\n");
	DEBUGF("block w %d h %d  x %d y %d w %d h %d, block_stride %d \n",
		block_w, block_h, x, y, w, h, block_stride);
	DEBUGRegionPrint(region);

	DEBUGF("start_x %d start_y %d end_x %d end_y %d \n", start_x, start_y, end_x, end_y);

	if (start_x >= end_x || start_y >= end_y) {
		*n_region = 0;
		return NULL;
	}

	start_block_x = (start_x  - x)/ block_w;
	start_block_y = (start_y - y)/ block_h;
	end_block_x = (end_x - x)/ block_w;
	end_block_y = (end_y - y)/ block_h;

	clipped_regions = calloc((end_block_x - start_block_x + 1)
				 * (end_block_y - start_block_y + 1),
				 sizeof(*clipped_regions));


	DEBUGF("startx %d starty %d endx %d endy %d \n",
		start_x, start_y, end_x, end_y);
	DEBUGF("start_block_x %d end_block_x %d \n", start_block_x, end_block_x);
	DEBUGF("start_block_y %d end_block_y %d \n", start_block_y, end_block_y);

	if (!reverse) {
		loop_start_block_x = start_block_x;
		loop_end_block_x = end_block_x + 1;
		delta_i = 1;
	} else {
		loop_start_block_x = end_block_x;
		loop_end_block_x = start_block_x - 1;
		delta_i = -1;
	}

	if (!upsidedown) {
		loop_start_block_y = start_block_y;
		loop_end_block_y = end_block_y + 1;
		delta_j = 1;
	} else {
		loop_start_block_y = end_block_y;
		loop_end_block_y = start_block_y - 1;
		delta_j = -1;
	}

	loop_block_stride = delta_j * block_stride;
	block_idx = (loop_start_block_y - delta_j) * block_stride;

	for(j = loop_start_block_y; j != loop_end_block_y; j += delta_j)
	{
		block_idx += loop_block_stride;
		temp_block_idx = block_idx + loop_start_block_x;
		for(i = loop_start_block_x;
		    i != loop_end_block_x; i += delta_i, temp_block_idx += delta_i)
		{
			BoxRec temp_box;
			temp_box.x1 = x + i * block_w;
			temp_box.y1 = y + j * block_h;
			temp_box.x2 = MIN(temp_box.x1 + block_w, end_x);
			temp_box.y2 = MIN(temp_box.y1 + block_h, end_y);
			RegionInitBoxes(&temp_region, &temp_box, 1);
			DEBUGF("block idx %d \n",temp_block_idx);
			DEBUGRegionPrint(&temp_region);
			current_region = RegionCreate(NULL, 4);
			RegionIntersect(current_region, &temp_region, region);
			DEBUGF("i %d j %d  region: \n",i ,j);
			DEBUGRegionPrint(current_region);
			if (RegionNumRects(current_region)) {
				clipped_regions[k].region = current_region;
				clipped_regions[k].block_idx = temp_block_idx;
				k++;
			} else
				RegionDestroy(current_region);
			RegionUninit(&temp_region);
		}
	}

	*n_region = k;
	return clipped_regions;
}

/**
 * Do a two round clipping,
 * first is to clip the region regard to current pixmap's
 * block array. Then for each clipped region, do a inner
 * block clipping. This is to make sure the final result
 * will be shapped by inner_block_w and inner_block_h, and
 * the final region also will not cross the pixmap's block
 * boundary.
 *
 * This is mainly used by transformation support when do
 * compositing.
 */

glamor_pixmap_clipped_regions *
glamor_compute_clipped_regions_ext(glamor_pixmap_private *pixmap_priv,
				   RegionPtr region,
				   int *n_region,
				   int inner_block_w, int inner_block_h,
				   int reverse, int upsidedown)
{
	glamor_pixmap_clipped_regions * clipped_regions, *inner_regions, *result_regions;
	int i, j, x, y, k, inner_n_regions;
	int width, height;
	glamor_pixmap_private_large_t *priv;
	priv = &pixmap_priv->large;

	DEBUGF("ext called \n");

	if (pixmap_priv->type != GLAMOR_TEXTURE_LARGE) {
		clipped_regions = calloc(1, sizeof(*clipped_regions));
		if (clipped_regions == NULL) {
			*n_region = 0;
			return NULL;
		}
		clipped_regions[0].region = RegionCreate(NULL, 1);
		clipped_regions[0].block_idx = 0;
		RegionCopy(clipped_regions[0].region, region);
		*n_region = 1;
		priv->block_w = priv->base.pixmap->drawable.width;
		priv->block_h = priv->base.pixmap->drawable.height;
		priv->box_array = &priv->box;
		priv->box.x1 = priv->box.y1 = 0;
		priv->box.x2 = priv->block_w;
		priv->box.y2 = priv->block_h;
	} else {
		clipped_regions =  __glamor_compute_clipped_regions(priv->block_w,
					priv->block_h,
					priv->block_wcnt,
					0, 0,
					priv->base.pixmap->drawable.width,
					priv->base.pixmap->drawable.height,
					region, n_region, reverse, upsidedown
					);

		if (clipped_regions == NULL) {
			*n_region = 0;
			return NULL;
		}
	}
	if (inner_block_w >= priv->block_w
	    && inner_block_h >= priv->block_h)
		return clipped_regions;
	result_regions = calloc(*n_region
				* ((priv->block_w + inner_block_w - 1)/inner_block_w)
				* ((priv->block_h + inner_block_h - 1)/ inner_block_h),
				sizeof(*result_regions));
	k = 0;
	for(i = 0; i < *n_region; i++)
	{
		x = priv->box_array[clipped_regions[i].block_idx].x1;
		y = priv->box_array[clipped_regions[i].block_idx].y1;
		width = priv->box_array[clipped_regions[i].block_idx].x2 - x;
		height = priv->box_array[clipped_regions[i].block_idx].y2 - y;
		inner_regions = __glamor_compute_clipped_regions(inner_block_w,
					inner_block_h,
					0, x, y,
					width,
					height,
					clipped_regions[i].region,
					&inner_n_regions, reverse, upsidedown);
		for(j = 0; j < inner_n_regions; j++)
		{
			result_regions[k].region = inner_regions[j].region;
			result_regions[k].block_idx = clipped_regions[i].block_idx;
			k++;
		}
		free(inner_regions);
	}
	*n_region = k;
	free(clipped_regions);
	return result_regions;
}

/*
 *
 * For the repeat pad mode, we can simply convert the region and
 * let the out-of-box region can cover the needed edge of the source/mask
 * Then apply a normal clip we can get what we want.
 */
static RegionPtr
_glamor_convert_pad_region(RegionPtr region, int w, int h)
{
	RegionPtr pad_region;
	int nrect;
	BoxPtr box;
	int overlap;

	nrect = RegionNumRects(region);
	box = RegionRects(region);
	pad_region = RegionCreate(NULL, 4);
	if (pad_region == NULL)
		return NULL;
	while(nrect--) {
		BoxRec pad_box;
		RegionRec temp_region;
		pad_box = *box;
		if (pad_box.x1 < 0 && pad_box.x2 <= 0)
			pad_box.x2 = 1;
		else if (pad_box.x1 >= w && pad_box.x2 > w)
			pad_box.x1 = w - 1;
		if (pad_box.y1 < 0 && pad_box.y2 <=0)
			pad_box.y2 = 1;
		else if (pad_box.y1 >= h && pad_box.y2 > h)
			pad_box.y1 = h - 1;
		RegionInitBoxes(&temp_region, &pad_box, 1);
		RegionAppend(pad_region, &temp_region);
		RegionUninit(&temp_region);
		box++;
	}
	RegionValidate(pad_region, &overlap);
	return pad_region;
}

/*
 * For one type of large pixmap, its one direction is not exceed the
 * size limitation, and in another word, on one direction it has only
 * one block.
 *
 * This case of reflect repeating, we can optimize it and avoid repeat
 * clip on that direction. We can just enlarge the repeat box and can
 * cover all the dest region on that direction. But latter, we need to
 * fixup the clipped result to get a correct coords for the subsequent
 * processing. This function is to do the coords correction.
 *
 * */
static void
_glamor_largepixmap_reflect_fixup(short *xy1, short *xy2, int wh)
{
	int odd1, odd2;
	int c1, c2;

	if (*xy2 - *xy1 > wh) {
		*xy1 = 0;
		*xy2 = wh;
		return;
	}
	modulus(*xy1, wh, c1);
	odd1 = ((*xy1 - c1) / wh) & 0x1;
	modulus(*xy2, wh, c2);
	odd2 = ((*xy2 - c2) / wh) & 0x1;

	if (odd1 && odd2) {
		*xy1 = wh - c2;
		*xy2 = wh - c1;
	} else if (odd1 && !odd2) {
		*xy1 = 0;
		*xy2 = MAX(c2, wh - c1);
	} else if (!odd1 && odd2) {
		*xy2 = wh;
		*xy1 = MIN(c1, wh - c2);
	} else {
		*xy1 = c1;
		*xy2 = c2;
	}
}

/**
 * Clip the boxes regards to each pixmap's block array.
 *
 * Should translate the region to relative coords to the pixmap,
 * start at (0,0).
 *
 * @is_transform: if it is set, it has a transform matrix.
 *
 */
static glamor_pixmap_clipped_regions *
_glamor_compute_clipped_regions(glamor_pixmap_private *pixmap_priv,
				RegionPtr region, int *n_region,
				int repeat_type, int is_transform,
				int reverse, int upsidedown)
{
	glamor_pixmap_clipped_regions * clipped_regions;
	BoxPtr extent;
	int i, j;
	RegionPtr current_region;
	int pixmap_width, pixmap_height;
	int m;
	BoxRec repeat_box;
	RegionRec repeat_region;
	int right_shift = 0;
	int down_shift = 0;
	int x_center_shift = 0, y_center_shift = 0;
	glamor_pixmap_private_large_t *priv;
	priv = &pixmap_priv->large;

	DEBUGRegionPrint(region);
	if (pixmap_priv->type != GLAMOR_TEXTURE_LARGE) {
		clipped_regions = calloc(1, sizeof(*clipped_regions));
		clipped_regions[0].region = RegionCreate(NULL, 1);
		clipped_regions[0].block_idx = 0;
		RegionCopy(clipped_regions[0].region, region);
		*n_region = 1;
		return clipped_regions;
	}

	pixmap_width = priv->base.pixmap->drawable.width;
	pixmap_height = priv->base.pixmap->drawable.height;
	if (repeat_type == 0 || repeat_type == RepeatPad) {
		RegionPtr saved_region = NULL;
		if (repeat_type == RepeatPad) {
			saved_region = region;
			region = _glamor_convert_pad_region(saved_region, pixmap_width, pixmap_height);
			if (region == NULL) {
				*n_region = 0;
				return NULL;
			}
		}
		clipped_regions = __glamor_compute_clipped_regions(priv->block_w,
							priv->block_h,
							priv->block_wcnt,
							0, 0,
							priv->base.pixmap->drawable.width,
							priv->base.pixmap->drawable.height,
							region, n_region, reverse, upsidedown
							);
		if (saved_region)
			RegionDestroy(region);
		return clipped_regions;
	}
	extent = RegionExtents(region);

	x_center_shift = extent->x1 / pixmap_width;
	if (x_center_shift < 0)
		x_center_shift--;
	if (abs(x_center_shift) & 1)
		x_center_shift++;
	y_center_shift = extent->y1 / pixmap_height;
	if (y_center_shift < 0)
		y_center_shift--;
	if (abs(y_center_shift) & 1)
		y_center_shift++;

	if (extent->x1 < 0)
		right_shift = ((-extent->x1 + pixmap_width - 1) / pixmap_width );
	if (extent->y1 < 0)
		down_shift = ((-extent->y1 + pixmap_height - 1) / pixmap_height );

	if (right_shift != 0 || down_shift != 0) {
		if (repeat_type == RepeatReflect) {
			right_shift = (right_shift + 1)&~1;
			down_shift = (down_shift + 1)&~1;
		}
		RegionTranslate(region, right_shift * pixmap_width, down_shift * pixmap_height);
	}

	extent = RegionExtents(region);
	/* Tile a large pixmap to another large pixmap.
	 * We can't use the target large pixmap as the
	 * loop variable, instead we need to loop for all
	 * the blocks in the tile pixmap.
	 *
	 * simulate repeat each single block to cover the
	 * target's blocks. Two special case:
	 * a block_wcnt == 1 or block_hcnt ==1, then we
	 * only need to loop one direction as the other
	 * direction is fully included in the first block.
	 *
	 * For the other cases, just need to start
	 * from a proper shiftx/shifty, and then increase
	 * y by tile_height each time to walk trhough the
	 * target block and then walk trhough the target
	 * at x direction by increate tile_width each time.
	 *
	 * This way, we can consolidate all the sub blocks
	 * of the target boxes into one tile source's block.
	 *
	 * */
	m = 0;
	clipped_regions = calloc(priv->block_wcnt * priv->block_hcnt,
				 sizeof(*clipped_regions));
	if (clipped_regions == NULL) {
		*n_region = 0;
		return NULL;
	}
	if (right_shift != 0 || down_shift != 0) {
		DEBUGF("region to be repeated shifted \n");
		DEBUGRegionPrint(region);
	}
	DEBUGF("repeat pixmap width %d height %d \n", pixmap_width, pixmap_height);
	DEBUGF("extent x1 %d y1 %d x2 %d y2 %d \n", extent->x1, extent->y1, extent->x2, extent->y2);
	for(j = 0; j < priv->block_hcnt; j++)
	{
		for(i = 0; i < priv->block_wcnt; i++)
		{
			int dx = pixmap_width;
			int dy = pixmap_height;
			int idx;
			int shift_x;
			int shift_y;
			int saved_y1, saved_y2;
			int x_idx = 0, y_idx = 0, saved_y_idx = 0;
			RegionRec temp_region;
			BoxRec reflect_repeat_box;
			BoxPtr valid_repeat_box;

			shift_x = (extent->x1 / pixmap_width) * pixmap_width;
			shift_y = (extent->y1 / pixmap_height) * pixmap_height;
			idx = j * priv->block_wcnt + i;
			if (repeat_type == RepeatReflect) {
				x_idx = (extent->x1 / pixmap_width);
				y_idx = (extent->y1 / pixmap_height);
			}

			/* Construct a rect to clip the target region. */
			repeat_box.x1 = shift_x + priv->box_array[idx].x1;
			repeat_box.y1 = shift_y + priv->box_array[idx].y1;
			if (priv->block_wcnt == 1) {
				repeat_box.x2 = extent->x2;
				dx = extent->x2 - repeat_box.x1;
			} else
				repeat_box.x2 = shift_x + priv->box_array[idx].x2;
			if (priv->block_hcnt == 1) {
				repeat_box.y2 = extent->y2;
				dy = extent->y2 - repeat_box.y1;
			} else
				repeat_box.y2 = shift_y + priv->box_array[idx].y2;

			current_region = RegionCreate(NULL, 4);
			RegionInit(&temp_region, NULL, 4);
			DEBUGF("init repeat box %d %d %d %d \n",
				repeat_box.x1, repeat_box.y1, repeat_box.x2, repeat_box.y2);

			if (repeat_type == RepeatNormal) {
				saved_y1 = repeat_box.y1;
				saved_y2 = repeat_box.y2;
				for(; repeat_box.x1 < extent->x2;
				      repeat_box.x1 += dx, repeat_box.x2 += dx)
				{
					repeat_box.y1 = saved_y1;
					repeat_box.y2 = saved_y2;
					for( repeat_box.y1 = saved_y1, repeat_box.y2 = saved_y2;
					     repeat_box.y1 < extent->y2;
					     repeat_box.y1 += dy, repeat_box.y2 += dy)
					{

						RegionInitBoxes(&repeat_region, &repeat_box, 1);
						DEBUGF("Start to clip repeat region: \n");
						DEBUGRegionPrint(&repeat_region);
						RegionIntersect(&temp_region, &repeat_region, region);
						DEBUGF("clip result:\n");
						DEBUGRegionPrint(&temp_region);
						RegionAppend(current_region, &temp_region);
						RegionUninit(&repeat_region);
					}
				}
			} else if (repeat_type == RepeatReflect) {
				saved_y1 = repeat_box.y1;
				saved_y2 = repeat_box.y2;
				saved_y_idx = y_idx;
				for(; ; repeat_box.x1 += dx, repeat_box.x2 += dx)
				{
					repeat_box.y1 = saved_y1;
					repeat_box.y2 = saved_y2;
					y_idx = saved_y_idx;
					reflect_repeat_box.x1 = (x_idx & 1) ?
								((2 * x_idx + 1) * dx - repeat_box.x2) : repeat_box.x1;
					reflect_repeat_box.x2 = (x_idx & 1) ?
								((2 * x_idx + 1) * dx - repeat_box.x1) : repeat_box.x2;
					valid_repeat_box = &reflect_repeat_box;

					if (valid_repeat_box->x1 >= extent->x2)
						break;
					for( repeat_box.y1 = saved_y1, repeat_box.y2 = saved_y2;
					     ;
					     repeat_box.y1 += dy, repeat_box.y2 += dy)
					{

						DEBUGF("x_idx %d y_idx %d dx %d dy %d\n", x_idx, y_idx, dx, dy);
						DEBUGF("repeat box %d %d %d %d \n",
							repeat_box.x1, repeat_box.y1, repeat_box.x2, repeat_box.y2);

						if (priv->block_hcnt > 1) {
						reflect_repeat_box.y1 = (y_idx & 1) ?
							((2 * y_idx + 1) * dy - repeat_box.y2) : repeat_box.y1;
						reflect_repeat_box.y2 = (y_idx & 1) ?
							((2 * y_idx + 1) * dy - repeat_box.y1) : repeat_box.y2;
						} else {
						reflect_repeat_box.y1 = repeat_box.y1;
						reflect_repeat_box.y2 = repeat_box.y2;
						}

						DEBUGF("valid_repeat_box x1 %d y1 %d \n",
							valid_repeat_box->x1, valid_repeat_box->y1);
						if (valid_repeat_box->y1 >= extent->y2)
							break;
						RegionInitBoxes(&repeat_region, valid_repeat_box, 1);
						DEBUGF("start to clip repeat[reflect] region: \n");
						DEBUGRegionPrint(&repeat_region);
						RegionIntersect(&temp_region, &repeat_region, region);
						DEBUGF("result:\n");
						DEBUGRegionPrint(&temp_region);
						if (is_transform && RegionNumRects(&temp_region)) {
							BoxRec temp_box;
							BoxPtr temp_extent;
							temp_extent = RegionExtents(&temp_region);
							if (priv->block_wcnt > 1) {
								if (x_idx & 1) {
									temp_box.x1 = ((2 * x_idx + 1)*dx - temp_extent->x2);
									temp_box.x2 = ((2 * x_idx + 1)*dx - temp_extent->x1);
								} else {
									temp_box.x1 = temp_extent->x1;
									temp_box.x2 = temp_extent->x2;
								}
								modulus(temp_box.x1, pixmap_width, temp_box.x1);
								modulus(temp_box.x2, pixmap_width, temp_box.x2);
								if (temp_box.x2 == 0) temp_box.x2 = pixmap_width;
							} else {
								temp_box.x1 = temp_extent->x1;
								temp_box.x2 = temp_extent->x2;
								_glamor_largepixmap_reflect_fixup(&temp_box.x1, &temp_box.x2, pixmap_width);
							}

							if (priv->block_hcnt > 1) {
								if (y_idx & 1) {
									temp_box.y1 = ((2 * y_idx + 1)*dy - temp_extent->y2);
									temp_box.y2 = ((2 * y_idx + 1)*dy - temp_extent->y1);
								} else {
									temp_box.y1 = temp_extent->y1;
									temp_box.y2 = temp_extent->y2;
								}

								modulus(temp_box.y1, pixmap_height, temp_box.y1);
								modulus(temp_box.y2, pixmap_height, temp_box.y2);
								if (temp_box.y2 == 0) temp_box.y2 = pixmap_height;
							} else {
								temp_box.y1 = temp_extent->y1;
								temp_box.y2 = temp_extent->y2;
								_glamor_largepixmap_reflect_fixup(&temp_box.y1, &temp_box.y2, pixmap_height);
							}

							RegionInitBoxes(&temp_region, &temp_box, 1);
							RegionTranslate(&temp_region, x_center_shift * pixmap_width, y_center_shift * pixmap_height);
							DEBUGF("for transform result:\n");
							DEBUGRegionPrint(&temp_region);
						}
						RegionAppend(current_region, &temp_region);
						RegionUninit(&repeat_region);
						y_idx++;
					}
					x_idx++;
				}
			}
			DEBUGF("dx %d dy %d \n", dx, dy);

			if (RegionNumRects(current_region)) {

				if ((right_shift != 0 || down_shift != 0) && !(is_transform && repeat_type == RepeatReflect))
					RegionTranslate(current_region,
							-right_shift * pixmap_width,
							-down_shift * pixmap_height);
				clipped_regions[m].region = current_region;
				clipped_regions[m].block_idx = idx;
				m++;
			} else
				RegionDestroy(current_region);
			RegionUninit(&temp_region);
		}
	}

	if (right_shift != 0 || down_shift != 0)
		RegionTranslate(region, -right_shift * pixmap_width, -down_shift * pixmap_height);
	*n_region = m;

	return clipped_regions;
}

glamor_pixmap_clipped_regions *
glamor_compute_clipped_regions(glamor_pixmap_private *priv, RegionPtr region,
			       int *n_region, int repeat_type,
			       int reverse, int upsidedown)
{
	return _glamor_compute_clipped_regions(priv, region, n_region, repeat_type, 0, reverse, upsidedown);
}

/* XXX overflow still exist. maybe we need to change to use region32.
 * by default. Or just use region32 for repeat cases?
 **/
glamor_pixmap_clipped_regions *
glamor_compute_transform_clipped_regions(glamor_pixmap_private *priv, struct pixman_transform *transform,
					 RegionPtr region, int *n_region, int dx, int dy, int repeat_type,
					 int reverse, int upsidedown)
{
	BoxPtr temp_extent;
	struct pixman_box32 temp_box;
	struct pixman_box16 short_box;
	RegionPtr temp_region;
	glamor_pixmap_clipped_regions *ret;

	temp_region = RegionCreate(NULL, 4);
	temp_extent = RegionExtents(region);
	DEBUGF("dest region \n");
	DEBUGRegionPrint(region);
	/* dx/dy may exceed MAX SHORT. we have to use
	 * a box32 to represent it.*/
	temp_box.x1 = temp_extent->x1 + dx;
	temp_box.x2 = temp_extent->x2 + dx;
	temp_box.y1 = temp_extent->y1 + dy;
	temp_box.y2 = temp_extent->y2 + dy;

	DEBUGF("source box %d %d %d %d \n", temp_box.x1, temp_box.y1, temp_box.x2, temp_box.y2);
	if (transform)
		glamor_get_transform_extent_from_box(&temp_box, transform);
	if (repeat_type == RepeatNone) {
		if (temp_box.x1 < 0) temp_box.x1 = 0;
		if (temp_box.y1 < 0) temp_box.y1 = 0;
		temp_box.x2 = MIN(temp_box.x2, priv->base.pixmap->drawable.width);
		temp_box.y2 = MIN(temp_box.y2, priv->base.pixmap->drawable.height);
	}
	/* Now copy back the box32 to a box16 box. */
	short_box.x1 = temp_box.x1;
	short_box.y1 = temp_box.y1;
	short_box.x2 = temp_box.x2;
	short_box.y2 = temp_box.y2;
	RegionInitBoxes(temp_region, &short_box, 1);
	DEBUGF("copy to temp source region \n");
	DEBUGRegionPrint(temp_region);
	ret = _glamor_compute_clipped_regions(priv,
					      temp_region,
					      n_region,
					      repeat_type,
					      1, reverse,
					      upsidedown);
	DEBUGF("n_regions = %d \n", *n_region);
	RegionDestroy(temp_region);

	return ret;
}
/*
 * As transform and repeatpad mode.
 * We may get a clipped result which in multipe regions.
 * It's not easy to do a 2nd round clipping just as we do
 * without transform/repeatPad. As it's not easy to reverse
 * the 2nd round clipping result with a transform/repeatPad mode,
 * or even impossible for some transformation.
 *
 * So we have to merge the fragmental region into one region
 * if the clipped result cross the region boundary.
 */
static void
glamor_merge_clipped_regions(glamor_pixmap_private *pixmap_priv, int repeat_type,
			     glamor_pixmap_clipped_regions *clipped_regions,
			     int *n_regions, int *need_clean_fbo)
{
	BoxPtr temp_extent;
	BoxRec temp_box, copy_box;
	RegionPtr temp_region;
	glamor_pixmap_private *temp_priv;
	PixmapPtr temp_pixmap;
	int overlap;
	int i;
	int pixmap_width, pixmap_height;
	glamor_pixmap_private_large_t *priv;

	priv = &pixmap_priv->large;
	pixmap_width = priv->base.pixmap->drawable.width;
	pixmap_height = priv->base.pixmap->drawable.height;

	temp_region = RegionCreate(NULL, 4);
	for(i = 0; i < *n_regions; i++)
	{
		DEBUGF("Region %d:\n", i);
		DEBUGRegionPrint(clipped_regions[i].region);
		RegionAppend(temp_region, clipped_regions[i].region);
	}

	RegionValidate(temp_region, &overlap);
	DEBUGF("temp region: \n");
	DEBUGRegionPrint(temp_region);
	temp_extent = RegionExtents(temp_region);

	temp_box = *temp_extent;

	DEBUGF("need copy region: \n");
	DEBUGF("%d %d %d %d \n", temp_box.x1, temp_box.y1, temp_box.x2, temp_box.y2);
	temp_pixmap = glamor_create_pixmap(priv->base.pixmap->drawable.pScreen,
					  temp_box.x2 - temp_box.x1,
					  temp_box.y2 - temp_box.y1,
					  priv->base.pixmap->drawable.depth,
					  GLAMOR_CREATE_PIXMAP_FIXUP);
	if (temp_pixmap == NULL) {
		assert(0);
		return;
	}

	temp_priv = glamor_get_pixmap_private(temp_pixmap);
	assert(temp_priv->type != GLAMOR_TEXTURE_LARGE);

	priv->box = temp_box;
	if (temp_extent->x1 >= 0 && temp_extent->x2 <= pixmap_width
	    && temp_extent->y1 >= 0 && temp_extent->y2 <= pixmap_height) {
		int dx, dy;
		copy_box.x1 = 0;
		copy_box.y1 = 0;
		copy_box.x2 = temp_extent->x2 - temp_extent->x1;
		copy_box.y2 = temp_extent->y2 - temp_extent->y1;
		dx = temp_extent->x1;
		dy = temp_extent->y1;
		glamor_copy_n_to_n(&priv->base.pixmap->drawable,
				   &temp_pixmap->drawable,
				   NULL, &copy_box, 1, dx,
				   dy, 0, 0, 0, NULL);
//		glamor_solid(temp_pixmap, 0, 0, temp_pixmap->drawable.width,
//			       temp_pixmap->drawable.height, GXcopy, 0xffffffff, 0xff00);
	} else {
		for (i = 0; i < *n_regions; i++)
		{
			BoxPtr box;
			int nbox;
			box = REGION_RECTS(clipped_regions[i].region);
			nbox = REGION_NUM_RECTS(clipped_regions[i].region);
			while(nbox--) {
				int dx, dy, c, d;
				DEBUGF("box x1 %d y1 %d x2 %d y2 %d \n",
					box->x1, box->y1, box->x2, box->y2);
				modulus(box->x1, pixmap_width, c);
				dx = c - (box->x1 - temp_box.x1);
				copy_box.x1 = box->x1 - temp_box.x1;
				copy_box.x2 = box->x2 - temp_box.x1;

				modulus(box->y1, pixmap_height, d);
				dy = d - (box->y1 - temp_box.y1);
				copy_box.y1 = box->y1 - temp_box.y1;
				copy_box.y2 = box->y2 - temp_box.y1;

				DEBUGF("copying box %d %d %d %d, dx %d dy %d\n",
					copy_box.x1, copy_box.y1, copy_box.x2,
					copy_box.y2, dx, dy);

				glamor_copy_n_to_n(&priv->base.pixmap->drawable,
						   &temp_pixmap->drawable,
						   NULL, &copy_box, 1, dx,
						   dy, 0, 0, 0, NULL);
				box++;
			}
		}
		//glamor_solid(temp_pixmap, 0, 0, temp_pixmap->drawable.width,
		//	       temp_pixmap->drawable.height, GXcopy, 0xffffffff, 0xff);
	}
	/* The first region will be released at caller side. */
	for(i = 1; i < *n_regions; i++)
		RegionDestroy(clipped_regions[i].region);
	RegionDestroy(temp_region);
	priv->box = temp_box;
	priv->base.fbo = glamor_pixmap_detach_fbo(temp_priv);
	DEBUGF("priv box x1 %d y1 %d x2 %d y2 %d \n",
		priv->box.x1, priv->box.y1, priv->box.x2, priv->box.y2);
	glamor_destroy_pixmap(temp_pixmap);
	*need_clean_fbo = 1;
	*n_regions = 1;
}



/**
 * Given an expected transformed block width and block height,
 *
 * This function calculate a new block width and height which
 * guarantee the transform result will not exceed the given
 * block width and height.
 *
 * For large block width and height (> 2048), we choose a
 * smaller new width and height and to reduce the cross region
 * boundary and can avoid some overhead.
 *
 **/
Bool
glamor_get_transform_block_size(struct pixman_transform *transform,
			   int block_w, int block_h,
			   int *transformed_block_w,
			   int *transformed_block_h)
{
	double a,b,c,d,e,f,g,h;
	double scale;
	int width, height;
	a = pixman_fixed_to_double(transform->matrix[0][0]);
	b = pixman_fixed_to_double(transform->matrix[0][1]);
	c = pixman_fixed_to_double(transform->matrix[1][0]);
	d = pixman_fixed_to_double(transform->matrix[1][1]);
	scale = pixman_fixed_to_double(transform->matrix[2][2]);
	if (block_w > 2048) {
	/* For large block size, we shrink it to smaller box,
	 * thus latter we may get less cross boundary regions and
	 * thus can avoid some extra copy.
	 *
	 **/
		width = block_w  / 4;
		height = block_h / 4;
	} else {
		width = block_w - 2;
		height = block_h - 2;
	}
	e = a + b;
	f = c + d;

	g = a - b;
	h = c - d;

	e = MIN(block_w, floor(width * scale) / MAX(fabs(e), fabs(g)));
	f = MIN(block_h, floor(height * scale) / MAX(fabs(f), fabs(h)));
	*transformed_block_w = MIN(e, f) - 1;
	*transformed_block_h = *transformed_block_w;
	if (*transformed_block_w <= 0 || *transformed_block_h <= 0)
		return FALSE;
	DEBUGF("original block_w/h %d %d, fixed %d %d \n", block_w, block_h,
		*transformed_block_w, *transformed_block_h);
	return TRUE;
}

#define VECTOR_FROM_POINT(p, x, y)	\
	p.v[0] = x;  \
	p.v[1] = y;  \
	p.v[2] = 1.0;
void
glamor_get_transform_extent_from_box(struct pixman_box32 *box,
		struct pixman_transform *transform)
{
	struct pixman_f_vector p0, p1, p2, p3;
	float min_x, min_y, max_x, max_y;

	struct pixman_f_transform ftransform;

	VECTOR_FROM_POINT(p0, box->x1, box->y1)
	VECTOR_FROM_POINT(p1, box->x2, box->y1)
	VECTOR_FROM_POINT(p2, box->x2, box->y2)
	VECTOR_FROM_POINT(p3, box->x1, box->y2)

	pixman_f_transform_from_pixman_transform(&ftransform, transform);
	pixman_f_transform_point(&ftransform, &p0);
	pixman_f_transform_point(&ftransform, &p1);
	pixman_f_transform_point(&ftransform, &p2);
	pixman_f_transform_point(&ftransform, &p3);

	min_x = MIN(p0.v[0], p1.v[0]);
	min_x = MIN(min_x, p2.v[0]);
	min_x = MIN(min_x, p3.v[0]);

	min_y = MIN(p0.v[1], p1.v[1]);
	min_y = MIN(min_y, p2.v[1]);
	min_y = MIN(min_y, p3.v[1]);

	max_x = MAX(p0.v[0], p1.v[0]);
	max_x = MAX(max_x, p2.v[0]);
	max_x = MAX(max_x, p3.v[0]);

	max_y = MAX(p0.v[1], p1.v[1]);
	max_y = MAX(max_y, p2.v[1]);
	max_y = MAX(max_y, p3.v[1]);
	box->x1 = floor(min_x) - 1;
	box->y1 = floor(min_y) - 1;
	box->x2 = ceil(max_x) + 1;
	box->y2 = ceil(max_y) + 1;
}

static void
_glamor_process_transformed_clipped_region(glamor_pixmap_private *priv,
					int repeat_type,
					glamor_pixmap_clipped_regions *clipped_regions,
					int *n_regions, int *need_clean_fbo)
{
	int shift_x, shift_y;
	if (*n_regions != 1) {
	/* Merge all source regions into one region. */
		glamor_merge_clipped_regions(priv, repeat_type,
					     clipped_regions, n_regions,
					     need_clean_fbo);
	} else {
		SET_PIXMAP_FBO_CURRENT(priv,
				       clipped_regions[0].block_idx);
		if (repeat_type == RepeatReflect || repeat_type == RepeatNormal) {
			/* The required source areas are in one region,
			 * we need to shift the corresponding box's coords to proper position,
			 * thus we can calculate the relative coords correctly.*/
			BoxPtr temp_box;
			int rem;
			temp_box = RegionExtents(clipped_regions[0].region);
			modulus(temp_box->x1, priv->base.pixmap->drawable.width, rem);
			shift_x = (temp_box->x1 - rem) / priv->base.pixmap->drawable.width;
			modulus(temp_box->y1, priv->base.pixmap->drawable.height, rem);
			shift_y = (temp_box->y1 - rem) / priv->base.pixmap->drawable.height;

			if (shift_x != 0) {
				priv->large.box.x1 += shift_x * priv->base.pixmap->drawable.width;
				priv->large.box.x2 += shift_x * priv->base.pixmap->drawable.width;
			}
			if (shift_y != 0) {
				priv->large.box.y1 += shift_y * priv->base.pixmap->drawable.height;
				priv->large.box.y2 += shift_y * priv->base.pixmap->drawable.height;
			}
		}
	}
}


Bool
glamor_composite_largepixmap_region(CARD8 op,
			  PicturePtr source,
			  PicturePtr mask,
			  PicturePtr dest,
			  glamor_pixmap_private * source_pixmap_priv,
			  glamor_pixmap_private * mask_pixmap_priv,
			  glamor_pixmap_private * dest_pixmap_priv,
			  RegionPtr region, Bool force_clip,
			  INT16 x_source,
			  INT16 y_source,
			  INT16 x_mask,
			  INT16 y_mask,
			  INT16 x_dest, INT16 y_dest,
			  CARD16 width, CARD16 height)
{
	glamor_screen_private *glamor_priv;
	glamor_pixmap_clipped_regions *clipped_dest_regions;
	glamor_pixmap_clipped_regions *clipped_source_regions;
	glamor_pixmap_clipped_regions *clipped_mask_regions;
	int n_dest_regions;
	int n_mask_regions;
	int n_source_regions;
	int i,j,k;
	int need_clean_source_fbo = 0;
	int need_clean_mask_fbo = 0;
	int is_normal_source_fbo = 0;
	int is_normal_mask_fbo = 0;
	int fixed_block_width, fixed_block_height;
	int null_source, null_mask;
	glamor_pixmap_private * need_free_source_pixmap_priv = NULL;
	glamor_pixmap_private * need_free_mask_pixmap_priv = NULL;
	int source_repeat_type = 0, mask_repeat_type = 0;
	int ok = TRUE;

	if (source->repeat)
		source_repeat_type = source->repeatType;
	else
		source_repeat_type = RepeatNone;

	if (mask && mask->repeat)
		mask_repeat_type = mask->repeatType;
	else
		mask_repeat_type = RepeatNone;

	glamor_priv = dest_pixmap_priv->base.glamor_priv;
	fixed_block_width = glamor_priv->max_fbo_size;
	fixed_block_height = glamor_priv->max_fbo_size;
	/* If we got an totally out-of-box region for a source or mask
	 * region without repeat, we need to set it as null_source and
	 * give it a solid color (0,0,0,0). */
	null_source = 0;
	null_mask = 0;
	RegionTranslate(region, -dest->pDrawable->x,
			-dest->pDrawable->y);

	/* need to transform the dest region to the correct sourcei/mask region.
	 * it's a little complex, as one single edge of the
	 * target region may be transformed to cross a block boundary of the
	 * source or mask. Then it's impossible to handle it as usual way.
	 * We may have to split the original dest region to smaller region, and
	 * make sure each region's transformed region can fit into one texture,
	 * and then continue this loop again, and each time when a transformed region
	 * cross the bound, we need to copy it to a single pixmap and do the composition
	 * with the new pixmap. If the transformed region doesn't cross a source/mask's
	 * boundary then we don't need to copy.
	 *
	 */
	if (source_pixmap_priv
	    && source->transform
	    && source_pixmap_priv->type == GLAMOR_TEXTURE_LARGE) {
		int source_transformed_block_width, source_transformed_block_height;
		if (!glamor_get_transform_block_size(source->transform,
					  source_pixmap_priv->large.block_w,
					  source_pixmap_priv->large.block_h,
					  &source_transformed_block_width,
					  &source_transformed_block_height)) {
			DEBUGF("source block size less than 1, fallback.\n");
			RegionTranslate(region, dest->pDrawable->x,
					dest->pDrawable->y);
			return FALSE;
		}
		fixed_block_width = min(fixed_block_width , source_transformed_block_width);
		fixed_block_height = min(fixed_block_height , source_transformed_block_height);
		DEBUGF("new source block size %d x %d \n", fixed_block_width, fixed_block_height);
	}

	if (mask_pixmap_priv
	    && mask->transform
	    && mask_pixmap_priv->type == GLAMOR_TEXTURE_LARGE) {
		int mask_transformed_block_width, mask_transformed_block_height;
		if (!glamor_get_transform_block_size(mask->transform,
					  mask_pixmap_priv->large.block_w,
					  mask_pixmap_priv->large.block_h,
					  &mask_transformed_block_width,
					  &mask_transformed_block_height)) {
			DEBUGF("mask block size less than 1, fallback.\n");
			RegionTranslate(region, dest->pDrawable->x,
					dest->pDrawable->y);
			return FALSE;
		}
		fixed_block_width = min(fixed_block_width , mask_transformed_block_width);
		fixed_block_height = min(fixed_block_height , mask_transformed_block_height);
		DEBUGF("new mask block size %d x %d \n", fixed_block_width, fixed_block_height);
	}

	/*compute the correct block width and height whose transformed source/mask
	 *region can fit into one texture.*/
	if (force_clip || fixed_block_width < glamor_priv->max_fbo_size
	    || fixed_block_height < glamor_priv->max_fbo_size)
		clipped_dest_regions = glamor_compute_clipped_regions_ext(dest_pixmap_priv,
									  region,
									  &n_dest_regions,
									  fixed_block_width,
									  fixed_block_height,
									  0, 0);
	else
		clipped_dest_regions = glamor_compute_clipped_regions(dest_pixmap_priv,
								      region,
								      &n_dest_regions,
								      0, 0, 0);
	DEBUGF("dest clipped result %d region: \n", n_dest_regions);
	if (source_pixmap_priv
	    && (source_pixmap_priv == dest_pixmap_priv || source_pixmap_priv == mask_pixmap_priv)
		&& source_pixmap_priv->type == GLAMOR_TEXTURE_LARGE) {
		/* XXX self-copy...*/
		need_free_source_pixmap_priv = source_pixmap_priv;
		source_pixmap_priv = malloc(sizeof(*source_pixmap_priv));
		*source_pixmap_priv = *need_free_source_pixmap_priv;
		need_free_source_pixmap_priv = source_pixmap_priv;
	}
	assert(mask_pixmap_priv != dest_pixmap_priv);

	for(i = 0; i < n_dest_regions; i++)
	{
		DEBUGF("dest region %d  idx %d\n", i, clipped_dest_regions[i].block_idx);
		DEBUGRegionPrint(clipped_dest_regions[i].region);
		SET_PIXMAP_FBO_CURRENT(dest_pixmap_priv, clipped_dest_regions[i].block_idx);
		if ( source_pixmap_priv && source_pixmap_priv->type == GLAMOR_TEXTURE_LARGE) {
			if (!source->transform && source_repeat_type != RepeatPad) {
				RegionTranslate(clipped_dest_regions[i].region,
						x_source - x_dest,
						y_source - y_dest);
				clipped_source_regions = glamor_compute_clipped_regions(source_pixmap_priv,
										        clipped_dest_regions[i].region,
										        &n_source_regions, source_repeat_type,
											0, 0);
				is_normal_source_fbo = 1;
			}
			else {
				clipped_source_regions = glamor_compute_transform_clipped_regions(source_pixmap_priv,
									source->transform,
									clipped_dest_regions[i].region,
									&n_source_regions,
									x_source - x_dest, y_source - y_dest,
									source_repeat_type, 0, 0);
				is_normal_source_fbo = 0;
				if (n_source_regions == 0) {
					/* Pad the out-of-box region to (0,0,0,0). */
					null_source = 1;
					n_source_regions = 1;
				} else
					_glamor_process_transformed_clipped_region(source_pixmap_priv,
						source_repeat_type, clipped_source_regions, &n_source_regions,
						&need_clean_source_fbo);
			}
			DEBUGF("source clipped result %d region: \n", n_source_regions);
			for(j = 0; j < n_source_regions; j++)
			{
				if (is_normal_source_fbo)
					SET_PIXMAP_FBO_CURRENT(source_pixmap_priv,
							       clipped_source_regions[j].block_idx);

				if (mask_pixmap_priv && mask_pixmap_priv->type == GLAMOR_TEXTURE_LARGE) {
					if (is_normal_mask_fbo && is_normal_source_fbo) {
						/* both mask and source are normal fbo box without transform or repeatpad.
						 * The region is clipped against source and then we clip it against mask here.*/
						DEBUGF("source region %d  idx %d\n", j, clipped_source_regions[j].block_idx);
						DEBUGRegionPrint(clipped_source_regions[j].region);
						RegionTranslate(clipped_source_regions[j].region,
								- x_source + x_mask,
							- y_source + y_mask);
						clipped_mask_regions = glamor_compute_clipped_regions(mask_pixmap_priv,
											     clipped_source_regions[j].region,
											     &n_mask_regions, mask_repeat_type,
											     0, 0);
						is_normal_mask_fbo = 1;
					} else if (is_normal_mask_fbo && !is_normal_source_fbo) {
						assert(n_source_regions == 1);
						/* The source fbo is not a normal fbo box, it has transform or repeatpad.
						 * the valid clip region should be the clip dest region rather than the
						 * clip source region.*/
						RegionTranslate(clipped_dest_regions[i].region,
								- x_dest + x_mask,
								- y_dest + y_mask);
						clipped_mask_regions = glamor_compute_clipped_regions(mask_pixmap_priv,
											     clipped_dest_regions[i].region,
											     &n_mask_regions, mask_repeat_type,
											     0, 0);
						is_normal_mask_fbo = 1;
					} else {
						/* This mask region has transform or repeatpad, we need clip it agains the previous
						 * valid region rather than the mask region. */
						if (!is_normal_source_fbo)
							clipped_mask_regions = glamor_compute_transform_clipped_regions(mask_pixmap_priv,
												mask->transform,
												clipped_dest_regions[i].region,
												&n_mask_regions,
												x_mask - x_dest,
												y_mask - y_dest,
												mask_repeat_type, 0, 0);
						else
							clipped_mask_regions = glamor_compute_transform_clipped_regions(mask_pixmap_priv,
												mask->transform,
												clipped_source_regions[j].region,
												&n_mask_regions,
												x_mask - x_source, y_mask - y_source,
												mask_repeat_type, 0, 0);
						is_normal_mask_fbo = 0;
						if (n_mask_regions == 0) {
						/* Pad the out-of-box region to (0,0,0,0). */
							null_mask = 1;
							n_mask_regions = 1;
						} else
							_glamor_process_transformed_clipped_region(mask_pixmap_priv,
								mask_repeat_type, clipped_mask_regions, &n_mask_regions,
								&need_clean_mask_fbo);
					}
					DEBUGF("mask clipped result %d region: \n", n_mask_regions);

#define COMPOSITE_REGION(region) do {				\
	if (!glamor_composite_clipped_region(op,		\
			 null_source ? NULL : source,		\
			 null_mask ? NULL : mask, dest,		\
			 null_source ? NULL : source_pixmap_priv, \
			 null_mask ? NULL : mask_pixmap_priv, 	\
			 dest_pixmap_priv, region,		\
			 x_source, y_source, x_mask, y_mask,	\
			 x_dest, y_dest)) {			\
		assert(0);					\
	}							\
   } while(0)

					for(k = 0; k < n_mask_regions; k++)
					{
						DEBUGF("mask region %d  idx %d\n", k, clipped_mask_regions[k].block_idx);
						DEBUGRegionPrint(clipped_mask_regions[k].region);
						if (is_normal_mask_fbo) {
							SET_PIXMAP_FBO_CURRENT(mask_pixmap_priv,
								       clipped_mask_regions[k].block_idx);
							DEBUGF("mask fbo off %d %d \n",
								mask_pixmap_priv->large.box.x1,
								mask_pixmap_priv->large.box.y1);
							DEBUGF("start composite mask hasn't transform.\n");
							RegionTranslate(clipped_mask_regions[k].region,
									x_dest - x_mask + dest->pDrawable->x,
									y_dest - y_mask + dest->pDrawable->y);
							COMPOSITE_REGION(clipped_mask_regions[k].region);
						} else if (!is_normal_mask_fbo && !is_normal_source_fbo) {
							DEBUGF("start composite both mask and source have transform.\n");
							RegionTranslate(clipped_dest_regions[i].region,
									dest->pDrawable->x,
									dest->pDrawable->y);
							COMPOSITE_REGION(clipped_dest_regions[i].region);
						} else {
							DEBUGF("start composite only mask has transform.\n");
							RegionTranslate(clipped_source_regions[j].region,
									x_dest - x_source + dest->pDrawable->x,
									y_dest - y_source + dest->pDrawable->y);
							COMPOSITE_REGION(clipped_source_regions[j].region);
						}
						RegionDestroy(clipped_mask_regions[k].region);
					}
					free(clipped_mask_regions);
					if (null_mask) null_mask = 0;
					if (need_clean_mask_fbo) {
						assert(is_normal_mask_fbo == 0);
						glamor_destroy_fbo(mask_pixmap_priv->base.fbo);
						mask_pixmap_priv->base.fbo = NULL;
						need_clean_mask_fbo = 0;
					}
				} else {
					if (is_normal_source_fbo) {
						RegionTranslate(clipped_source_regions[j].region,
								-x_source + x_dest + dest->pDrawable->x,
								-y_source + y_dest + dest->pDrawable->y);
						COMPOSITE_REGION(clipped_source_regions[j].region);
					} else {
						/* Source has transform or repeatPad. dest regions is the right
						 * region to do the composite. */
						RegionTranslate(clipped_dest_regions[i].region,
								dest->pDrawable->x,
								dest->pDrawable->y);
						COMPOSITE_REGION(clipped_dest_regions[i].region);
					}
				}
				if (clipped_source_regions && clipped_source_regions[j].region)
					RegionDestroy(clipped_source_regions[j].region);
			}
			free(clipped_source_regions);
			if (null_source) null_source = 0;
			if (need_clean_source_fbo) {
				assert(is_normal_source_fbo == 0);
				glamor_destroy_fbo(source_pixmap_priv->base.fbo);
				source_pixmap_priv->base.fbo = NULL;
				need_clean_source_fbo = 0;
			}
		}
		else {
			if (mask_pixmap_priv && mask_pixmap_priv->type == GLAMOR_TEXTURE_LARGE) {
				if (!mask->transform && mask_repeat_type != RepeatPad) {
					RegionTranslate(clipped_dest_regions[i].region,
							x_mask - x_dest,
							y_mask - y_dest);
					clipped_mask_regions = glamor_compute_clipped_regions(mask_pixmap_priv,
								        clipped_dest_regions[i].region,
								        &n_mask_regions, mask_repeat_type, 0, 0);
					is_normal_mask_fbo = 1;
				}
				else {
					clipped_mask_regions = glamor_compute_transform_clipped_regions(mask_pixmap_priv,
										mask->transform,
										clipped_dest_regions[i].region,
										&n_mask_regions,
										x_mask - x_dest, y_mask - y_dest,
										mask_repeat_type, 0, 0);
					is_normal_mask_fbo = 0;
					if (n_mask_regions == 0) {
						/* Pad the out-of-box region to (0,0,0,0). */
						null_mask = 1;
						n_mask_regions = 1;
					} else
						_glamor_process_transformed_clipped_region(mask_pixmap_priv,
							mask_repeat_type, clipped_mask_regions, &n_mask_regions,
							&need_clean_mask_fbo);
				}

				for(k = 0; k < n_mask_regions; k++)
				{
					DEBUGF("mask region %d  idx %d\n", k, clipped_mask_regions[k].block_idx);
					DEBUGRegionPrint(clipped_mask_regions[k].region);
					if (is_normal_mask_fbo) {
						SET_PIXMAP_FBO_CURRENT(mask_pixmap_priv,
								       clipped_mask_regions[k].block_idx);
						RegionTranslate(clipped_mask_regions[k].region,
								x_dest - x_mask + dest->pDrawable->x,
								y_dest - y_mask + dest->pDrawable->y);
						COMPOSITE_REGION(clipped_mask_regions[k].region);
					} else {
						RegionTranslate(clipped_dest_regions[i].region,
								dest->pDrawable->x,
								dest->pDrawable->y);
						COMPOSITE_REGION(clipped_dest_regions[i].region);
					}
					RegionDestroy(clipped_mask_regions[k].region);
				}
				free(clipped_mask_regions);
				if (null_mask) null_mask = 0;
				if (need_clean_mask_fbo) {
					glamor_destroy_fbo(mask_pixmap_priv->base.fbo);
					mask_pixmap_priv->base.fbo = NULL;
					need_clean_mask_fbo = 0;
				}
			}
			else {
				RegionTranslate(clipped_dest_regions[i].region,
						dest->pDrawable->x,
						dest->pDrawable->y);
				COMPOSITE_REGION(clipped_dest_regions[i].region);
			}
		}
		RegionDestroy(clipped_dest_regions[i].region);
	}
	free(clipped_dest_regions);
	free(need_free_source_pixmap_priv);
	free(need_free_mask_pixmap_priv);
	ok = TRUE;
	return ok;
}