nv50_miptree.c revision 562b31195cc8140d3bd0ad7ed8532200e9df520a 
1/*
2 * Copyright 2008 Ben Skeggs
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
17 * THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
18 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
19 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
20 * SOFTWARE.
21 */
22
23#include "pipe/p_state.h"
24#include "pipe/p_defines.h"
25#include "pipe/p_inlines.h"
26
27#include "nv50_context.h"
28
29static struct pipe_texture *
30nv50_miptree_create(struct pipe_screen *pscreen, const struct pipe_texture *pt)
31{
32	struct pipe_winsys *ws = pscreen->winsys;
33	struct nv50_miptree *mt = CALLOC_STRUCT(nv50_miptree);
34	unsigned usage, pitch;
35
36	mt->base = *pt;
37	mt->base.refcount = 1;
38	mt->base.screen = pscreen;
39
40	usage = PIPE_BUFFER_USAGE_PIXEL;
41	switch (pt->format) {
42	case PIPE_FORMAT_Z24S8_UNORM:
43	case PIPE_FORMAT_Z16_UNORM:
44		usage |= NOUVEAU_BUFFER_USAGE_ZETA;
45		break;
46	default:
47		break;
48	}
49
50	pitch = ((pt->width[0] + 63) & ~63) * pt->block.size;
51	/*XXX*/
52	pitch *= 2;
53
54	mt->buffer = ws->buffer_create(ws, 256, usage, pitch * pt->height[0]);
55	if (!mt->buffer) {
56		FREE(mt);
57		return NULL;
58	}
59
60	return &mt->base;
61}
62
63static void
64nv50_miptree_release(struct pipe_screen *pscreen, struct pipe_texture **ppt)
65{
66	struct pipe_texture *pt = *ppt;
67
68	*ppt = NULL;
69
70	if (--pt->refcount <= 0) {
71		struct nv50_miptree *mt = nv50_miptree(pt);
72
73		pipe_buffer_reference(pscreen, &mt->buffer, NULL);
74		FREE(mt);
75	}
76}
77
78static struct pipe_surface *
79nv50_miptree_surface_new(struct pipe_screen *pscreen, struct pipe_texture *pt,
80			 unsigned face, unsigned level, unsigned zslice,
81			 unsigned flags)
82{
83	struct nv50_miptree *mt = nv50_miptree(pt);
84	struct nv50_surface *s;
85	struct pipe_surface *ps;
86
87	s = CALLOC_STRUCT(nv50_surface);
88	if (!s)
89		return NULL;
90	ps = &s->base;
91
92	ps->refcount = 1;
93	ps->winsys = pscreen->winsys;
94	ps->format = pt->format;
95	ps->width = pt->width[level];
96	ps->height = pt->height[level];
97	ps->block = pt->block;
98	ps->nblocksx = pt->nblocksx[level];
99	ps->nblocksy = pt->nblocksy[level];
100	ps->stride = ps->width * ps->block.size;
101	ps->offset = 0;
102	ps->usage = flags;
103	ps->status = PIPE_SURFACE_STATUS_DEFINED;
104
105	pipe_texture_reference(&ps->texture, pt);
106	pipe_buffer_reference(pscreen, &ps->buffer, mt->buffer);
107
108	return ps;
109}
110
111static void
112nv50_miptree_surface_del(struct pipe_screen *pscreen,
113			 struct pipe_surface **psurface)
114{
115	struct pipe_surface *ps = *psurface;
116	struct nv50_surface *s = nv50_surface(ps);
117
118	*psurface = NULL;
119
120	if (--ps->refcount <= 0) {
121		pipe_texture_reference(&ps->texture, NULL);
122		pipe_buffer_reference(pscreen, &ps->buffer, NULL);
123		FREE(s);
124	}
125}
126
127void
128nv50_screen_init_miptree_functions(struct pipe_screen *pscreen)
129{
130	pscreen->texture_create = nv50_miptree_create;
131	pscreen->texture_release = nv50_miptree_release;
132	pscreen->get_tex_surface = nv50_miptree_surface_new;
133	pscreen->tex_surface_release = nv50_miptree_surface_del;
134}
135
136