draw: don't crash if GS doesn't emit anything
[mesa.git] / src / gallium / auxiliary / postprocess / postprocess.h
1 /**************************************************************************
2 *
3 * Copyright 2011 Lauri Kasanen
4 * All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the
8 * "Software"), to deal in the Software without restriction, including
9 * without limitation the rights to use, copy, modify, merge, publish,
10 * distribute, sub license, and/or sell copies of the Software, and to
11 * permit persons to whom the Software is furnished to do so, subject to
12 * the following conditions:
13 *
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
16 * of the Software.
17 *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
21 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
22 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
23 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
24 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
25 *
26 **************************************************************************/
27
28 #ifndef POSTPROCESS_H
29 #define POSTPROCESS_H
30
31 #include "postprocess/pp_program.h"
32
33 #define PP_FILTERS 6 /* Increment this if you add filters */
34 #define PP_MAX_PASSES 6
35
36 struct pp_queue_t; /* Forward definition */
37
38 /* Less typing later on */
39 typedef void (*pp_func) (struct pp_queue_t *, struct pipe_resource *,
40 struct pipe_resource *, unsigned int);
41 /**
42 * The main post-processing queue.
43 */
44 struct pp_queue_t
45 {
46 pp_func *pp_queue; /* An array of pp_funcs */
47 unsigned int n_filters; /* Number of enabled filters */
48
49 struct pipe_resource *tmp[2]; /* Two temp FBOs for the queue */
50 struct pipe_resource *inner_tmp[3]; /* Three for filter use */
51
52 unsigned int n_tmp, n_inner_tmp;
53
54 struct pipe_resource *depth; /* depth of original input */
55 struct pipe_resource *stencil; /* stencil shared by inner_tmps */
56
57 struct pipe_surface *tmps[2], *inner_tmps[3], *stencils;
58
59 void ***shaders; /* Shaders in TGSI form */
60 unsigned int *verts;
61 struct program *p;
62
63 bool fbos_init;
64 };
65
66 /* Main functions */
67
68 struct pp_queue_t *pp_init(struct pipe_context *pipe, const unsigned int *,
69 struct cso_context *);
70 void pp_run(struct pp_queue_t *, struct pipe_resource *,
71 struct pipe_resource *, struct pipe_resource *);
72 void pp_free(struct pp_queue_t *);
73 void pp_free_fbos(struct pp_queue_t *);
74 void pp_debug(const char *, ...);
75 struct program *pp_init_prog(struct pp_queue_t *, struct pipe_context *pipe,
76 struct cso_context *);
77 void pp_init_fbos(struct pp_queue_t *, unsigned int, unsigned int);
78
79 /* The filters */
80
81 void pp_nocolor(struct pp_queue_t *, struct pipe_resource *,
82 struct pipe_resource *, unsigned int);
83
84 void pp_jimenezmlaa(struct pp_queue_t *, struct pipe_resource *,
85 struct pipe_resource *, unsigned int);
86 void pp_jimenezmlaa_color(struct pp_queue_t *, struct pipe_resource *,
87 struct pipe_resource *, unsigned int);
88
89 /* The filter init functions */
90
91 void pp_celshade_init(struct pp_queue_t *, unsigned int, unsigned int);
92
93 void pp_nored_init(struct pp_queue_t *, unsigned int, unsigned int);
94 void pp_nogreen_init(struct pp_queue_t *, unsigned int, unsigned int);
95 void pp_noblue_init(struct pp_queue_t *, unsigned int, unsigned int);
96
97 void pp_jimenezmlaa_init(struct pp_queue_t *, unsigned int, unsigned int);
98 void pp_jimenezmlaa_init_color(struct pp_queue_t *, unsigned int,
99 unsigned int);
100
101 #endif