/*
 * Copyright © 2008 Intel Corporation
 * Copyright © 1998 Keith Packard
 *
 * Permission to use, copy, modify, distribute, and sell this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * the above copyright notice appear in all copies and that both that
 * copyright notice and this permission notice appear in supporting
 * documentation, and that the name of Keith Packard not be used in
 * advertising or publicity pertaining to distribution of the software without
 * specific, written prior permission.  Keith Packard makes no
 * representations about the suitability of this software for any purpose.  It
 * is provided "as is" without express or implied warranty.
 *
 * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
 * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 *
 * Authors:
 *    Eric Anholt <eric@anholt.net>
 *    Zhigang Gong <zhigang.gong@linux.intel.com>
 */

#include "glamor_priv.h"

/** @file glamor_copyarea.c
 *
 * GC CopyArea implementation
 */
#ifndef GLAMOR_GLES2
static Bool
glamor_copy_n_to_n_fbo_blit(DrawablePtr src,
			    DrawablePtr dst,
			    GCPtr gc, BoxPtr box, int nbox, int dx, int dy)
{
	ScreenPtr screen = dst->pScreen;
	PixmapPtr dst_pixmap = glamor_get_drawable_pixmap(dst);
	PixmapPtr src_pixmap = glamor_get_drawable_pixmap(src);
	glamor_pixmap_private *src_pixmap_priv, *dst_pixmap_priv;
	glamor_screen_private *glamor_priv =
	    glamor_get_screen_private(screen);
	glamor_gl_dispatch *dispatch;
	int dst_x_off, dst_y_off, src_x_off, src_y_off, i;
	int fbo_x_off, fbo_y_off;
	int src_fbo_x_off, src_fbo_y_off;

	if (!glamor_priv->has_fbo_blit) {
		glamor_delayed_fallback(screen,
					"no EXT_framebuffer_blit\n");
		return FALSE;
	}
	src_pixmap_priv = glamor_get_pixmap_private(src_pixmap);
	dst_pixmap_priv = glamor_get_pixmap_private(dst_pixmap);

	if (gc) {
		if (gc->alu != GXcopy) {
			glamor_delayed_fallback(screen, "non-copy ALU\n");
			return FALSE;
		}
	}

	if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(src_pixmap_priv)) {
		glamor_delayed_fallback(screen, "no src fbo\n");
		return FALSE;
	}

	if (glamor_set_destination_pixmap(dst_pixmap))
		return FALSE;

	pixmap_priv_get_fbo_off(dst_pixmap_priv, &fbo_x_off, &fbo_y_off);
	pixmap_priv_get_fbo_off(src_pixmap_priv, &src_fbo_x_off, &src_fbo_y_off);

	dispatch = glamor_get_dispatch(glamor_priv);
	dispatch->glBindFramebuffer(GL_READ_FRAMEBUFFER_EXT,
				    src_pixmap_priv->base.fbo->fb);
	glamor_get_drawable_deltas(dst, dst_pixmap, &dst_x_off,
				   &dst_y_off);
	glamor_get_drawable_deltas(src, src_pixmap, &src_x_off,
				   &src_y_off);
	dst_x_off += fbo_x_off;
	dst_y_off += fbo_y_off;
	src_y_off += dy + src_fbo_y_off;
	src_x_off += src_fbo_x_off;

	for (i = 0; i < nbox; i++) {
		if (glamor_priv->yInverted) {
			dispatch->glBlitFramebuffer((box[i].x1 + dx +
						     src_x_off),
						    (box[i].y1 +
						     src_y_off),
						    (box[i].x2 + dx +
						     src_x_off),
						    (box[i].y2 +
						     src_y_off),
						    (box[i].x1 +
						     dst_x_off),
						    (box[i].y1 +
						     dst_y_off),
						    (box[i].x2 +
						     dst_x_off),
						    (box[i].y2 +
						     dst_y_off),
						    GL_COLOR_BUFFER_BIT,
						    GL_NEAREST);
		} else {
			int flip_dst_y1 =
			    dst_pixmap->drawable.height - (box[i].y2 +
							   dst_y_off);
			int flip_dst_y2 =
			    dst_pixmap->drawable.height - (box[i].y1 +
							   dst_y_off);
			int flip_src_y1 =
			    src_pixmap->drawable.height - (box[i].y2 +
							   src_y_off);
			int flip_src_y2 =
			    src_pixmap->drawable.height - (box[i].y1 +
							   src_y_off);

			dispatch->glBlitFramebuffer(box[i].x1 + dx +
						    src_x_off,
						    flip_src_y1,
						    box[i].x2 + dx +
						    src_x_off,
						    flip_src_y2,
						    box[i].x1 +
						    dst_x_off,
						    flip_dst_y1,
						    box[i].x2 +
						    dst_x_off,
						    flip_dst_y2,
						    GL_COLOR_BUFFER_BIT,
						    GL_NEAREST);
		}
	}
	glamor_put_dispatch(glamor_priv);
	glamor_priv->state = BLIT_STATE;
	return TRUE;
}
#endif

static Bool
glamor_copy_n_to_n_textured(DrawablePtr src,
			    DrawablePtr dst,
			    GCPtr gc, BoxPtr box, int nbox, int dx, int dy)
{
	glamor_screen_private *glamor_priv =
	    glamor_get_screen_private(dst->pScreen);
	glamor_gl_dispatch *dispatch;
	PixmapPtr src_pixmap = glamor_get_drawable_pixmap(src);
	PixmapPtr dst_pixmap = glamor_get_drawable_pixmap(dst);
	int i;
	float vertices[8], texcoords[8];
	glamor_pixmap_private *src_pixmap_priv;
	glamor_pixmap_private *dst_pixmap_priv;
	int src_x_off, src_y_off, dst_x_off, dst_y_off;
	enum glamor_pixmap_status src_status = GLAMOR_NONE;
	GLfloat dst_xscale, dst_yscale, src_xscale, src_yscale;

	src_pixmap_priv = glamor_get_pixmap_private(src_pixmap);
	dst_pixmap_priv = glamor_get_pixmap_private(dst_pixmap);

	if (!src_pixmap_priv->base.gl_fbo) {
#ifndef GLAMOR_PIXMAP_DYNAMIC_UPLOAD
		glamor_delayed_fallback(dst->pScreen, "src has no fbo.\n");
		return FALSE;
#else
		src_status = glamor_upload_pixmap_to_texture(src_pixmap);
		if (src_status != GLAMOR_UPLOAD_DONE)
			return FALSE;

		src_pixmap_priv = glamor_get_pixmap_private(src_pixmap);
#endif
	}


	pixmap_priv_get_dest_scale(dst_pixmap_priv, &dst_xscale, &dst_yscale);
	pixmap_priv_get_scale(src_pixmap_priv, &src_xscale, &src_yscale);

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

	dispatch = glamor_get_dispatch(glamor_priv);


	glamor_set_destination_pixmap_priv_nc(dst_pixmap_priv);
	dispatch->glVertexAttribPointer(GLAMOR_VERTEX_POS, 2, GL_FLOAT,
					GL_FALSE, 2 * sizeof(float),
					vertices);
	dispatch->glEnableVertexAttribArray(GLAMOR_VERTEX_POS);

	glamor_get_drawable_deltas(src, src_pixmap, &src_x_off,
				   &src_y_off);
	dx += src_x_off;
	dy += src_y_off;

	dispatch->glActiveTexture(GL_TEXTURE0);
	dispatch->glBindTexture(GL_TEXTURE_2D,
				src_pixmap_priv->base.fbo->tex);
#ifndef GLAMOR_GLES2
	dispatch->glEnable(GL_TEXTURE_2D);
	dispatch->glTexParameteri(GL_TEXTURE_2D,
				  GL_TEXTURE_WRAP_S,
				  GL_CLAMP_TO_BORDER);
	dispatch->glTexParameteri(GL_TEXTURE_2D,
				  GL_TEXTURE_WRAP_T,
				  GL_CLAMP_TO_BORDER);
#endif
	dispatch->glTexParameteri(GL_TEXTURE_2D,
				  GL_TEXTURE_MIN_FILTER,
				  GL_NEAREST);
	dispatch->glTexParameteri(GL_TEXTURE_2D,
				  GL_TEXTURE_MAG_FILTER,
				  GL_NEAREST);

	dispatch->glVertexAttribPointer(GLAMOR_VERTEX_SOURCE, 2,
					GL_FLOAT, GL_FALSE,
					2 * sizeof(float),
					texcoords);
	dispatch->glEnableVertexAttribArray(GLAMOR_VERTEX_SOURCE);
	dispatch->glUseProgram(glamor_priv->finish_access_prog[0]);
	dispatch->glUniform1i(glamor_priv->finish_access_revert[0],
			      REVERT_NONE);
	dispatch->glUniform1i(glamor_priv->finish_access_swap_rb[0],
			      SWAP_NONE_UPLOADING);

	for (i = 0; i < nbox; i++) {

		glamor_set_normalize_vcoords(dst_pixmap_priv,
					     dst_xscale, dst_yscale,
					     box[i].x1 + dst_x_off,
					     box[i].y1 + dst_y_off,
					     box[i].x2 + dst_x_off,
					     box[i].y2 + dst_y_off,
					     glamor_priv->yInverted,
					     vertices);

		glamor_set_normalize_tcoords(src_pixmap_priv,
					     src_xscale,
					     src_yscale,
					     box[i].x1 + dx,
					     box[i].y1 + dy,
					     box[i].x2 + dx,
					     box[i].y2 + dy,
					     glamor_priv->yInverted,
					     texcoords);
		dispatch->glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
	}

	dispatch->glDisableVertexAttribArray(GLAMOR_VERTEX_POS);
	dispatch->glDisableVertexAttribArray(GLAMOR_VERTEX_SOURCE);
#ifndef GLAMOR_GLES2
	dispatch->glDisable(GL_TEXTURE_2D);
#endif
	dispatch->glUseProgram(0);
	/* The source texture is bound to a fbo, we have to flush it here. */
	glamor_put_dispatch(glamor_priv);
	glamor_priv->state = RENDER_STATE;
	glamor_priv->render_idle_cnt = 0;
	return TRUE;
}

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;
}

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;
		}
		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);
		RegionUninit(&region);
	} else {
		ok = __glamor_copy_n_to_n(src, dst, gc, box, nbox, dx, dy,
					  reverse, upsidedown, bitplane,
					  closure);
	}

fail:
	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)) {
		if (dst == src
		    || glamor_prepare_access(src, GLAMOR_ACCESS_RO)) {
			fbCopyNtoN(src, dst, gc, box, nbox,
				   dx, dy, reverse, upsidedown, bitplane,
				   closure);
			if (dst != src)
				glamor_finish_access(src, GLAMOR_ACCESS_RO);
		}
		glamor_finish_access(dst, GLAMOR_ACCESS_RW);
	}
	ok = TRUE;

      done:
	glamor_clear_delayed_fallbacks(src->pScreen);
	glamor_clear_delayed_fallbacks(dst->pScreen);
	return ok;
}

RegionPtr
glamor_copy_area(DrawablePtr src, DrawablePtr dst, GCPtr gc,
		 int srcx, int srcy, int width, int height, int dstx,
		 int dsty)
{
	RegionPtr region;
	region = miDoCopy(src, dst, gc,
			  srcx, srcy, width, height,
			  dstx, dsty, glamor_copy_n_to_n, 0, NULL);

	return region;
}

void
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)
{
	_glamor_copy_n_to_n(src, dst, gc, box, nbox, dx,
			    dy, reverse, upsidedown, bitplane, closure, TRUE);
}

Bool
glamor_copy_n_to_n_nf(DrawablePtr src,
		   DrawablePtr dst,
		   GCPtr gc,
		   BoxPtr box,
		   int nbox,
		   int dx,
		   int dy,
		   Bool reverse,
		   Bool upsidedown, Pixel bitplane,
		   void *closure)
{
	return _glamor_copy_n_to_n(src, dst, gc, box, nbox, dx,
				    dy, reverse, upsidedown, bitplane, closure, FALSE);
}

