#include "pipe/p_state.h"
#include "pipe/p_defines.h"
#include "pipe/p_util.h"
#include "pipe/p_inlines.h"

#include "nv50_context.h"

static struct pipe_texture *
nv50_miptree_create(struct pipe_screen *pscreen, const struct pipe_texture *pt)
{
	struct pipe_winsys *ws = pscreen->winsys;
	struct nv50_miptree *mt = CALLOC_STRUCT(nv50_miptree);
	unsigned usage;

	NOUVEAU_ERR("unimplemented\n");

	mt->base = *pt;
	mt->base.refcount = 1;
	mt->base.screen = pscreen;

	usage = PIPE_BUFFER_USAGE_PIXEL;
	switch (pt->format) {
	case PIPE_FORMAT_Z24S8_UNORM:
	case PIPE_FORMAT_Z16_UNORM:
		usage |= NOUVEAU_BUFFER_USAGE_ZETA;
		break;
	default:
		break;
	}

	mt->buffer = ws->buffer_create(ws, 256, usage,
				       pt->width[0] * pt->cpp * pt->height[0]);
	if (!mt->buffer) {
		FREE(mt);
		return NULL;
	}

	return &mt->base;
}

static void
nv50_miptree_release(struct pipe_screen *pscreen, struct pipe_texture **ppt)
{
	struct pipe_winsys *ws = pscreen->winsys;
	struct pipe_texture *pt = *ppt;

	NOUVEAU_ERR("unimplemented\n");

	*ppt = NULL;
	if (--pt->refcount <= 0) {
		struct nv50_miptree *mt = nv50_miptree(pt);

		pipe_buffer_reference(ws, &mt->buffer, NULL);
		FREE(mt);
	}
}

static struct pipe_surface *
nv50_miptree_surface_new(struct pipe_screen *pscreen, struct pipe_texture *pt,
			 unsigned face, unsigned level, unsigned zslice,
			 unsigned flags)
{
	struct pipe_winsys *ws = pscreen->winsys;
	struct nv50_miptree *mt = nv50_miptree(pt);
	struct pipe_surface *ps;

	NOUVEAU_ERR("unimplemented\n");

	ps = ws->surface_alloc(ws);
	if (!ps)
		return NULL;

	pipe_buffer_reference(ws, &ps->buffer, mt->buffer);
	ps->format = pt->format;
	ps->width = pt->width[level];
	ps->height = pt->height[level];
	ps->block = pt->block;
	ps->nblocksx = pt->nblocksx[level];
	ps->nblocksy = pt->nblocksy[level];
	ps->stride = ps->width * ps->block.size;
	ps->offset = 0;

	return ps;
}

static void
nv50_miptree_surface_del(struct pipe_screen *pscreen,
			 struct pipe_surface **psurface)
{
}

void
nv50_screen_init_miptree_functions(struct pipe_screen *pscreen)
{
	pscreen->texture_create = nv50_miptree_create;
	pscreen->texture_release = nv50_miptree_release;
	pscreen->get_tex_surface = nv50_miptree_surface_new;
	pscreen->tex_surface_release = nv50_miptree_surface_del;
}