1/*
2 * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
3 *                Joakim Sindholt <opensource@zhasha.com>
4 * Copyright 2009 Marek Olšák <maraeo@gmail.com>
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * on the rights to use, copy, modify, merge, publish, distribute, sub
10 * license, and/or sell copies of the Software, and to permit persons to whom
11 * the Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice (including the next
14 * paragraph) shall be included in all copies or substantial portions of the
15 * Software.
16 *
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
21 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
22 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
23 * USE OR OTHER DEALINGS IN THE SOFTWARE. */
24
25#ifndef R300_FS_H
26#define R300_FS_H
27
28#include "pipe/p_state.h"
29#include "tgsi/tgsi_scan.h"
30#include "compiler/radeon_code.h"
31#include "r300_shader_semantics.h"
32
33struct r300_fragment_shader_code {
34    struct rX00_fragment_program_code code;
35    struct tgsi_shader_info info;
36    struct r300_shader_semantics inputs;
37
38    /* Whether the shader was replaced by a dummy one due to a shader
39     * compilation failure. */
40    boolean dummy;
41
42    /* Numbers of constants for each type. */
43    unsigned externals_count;
44    unsigned immediates_count;
45    unsigned rc_state_count;
46
47    /* Registers for fragment depth output setup. */
48    uint32_t fg_depth_src;      /* R300_FG_DEPTH_SRC: 0x4bd8 */
49    uint32_t us_out_w;          /* R300_US_W_FMT:     0x46b4 */
50
51    struct r300_fragment_program_external_state compare_state;
52
53    unsigned cb_code_size;
54    uint32_t *cb_code;
55
56    struct r300_fragment_shader_code* next;
57
58    boolean write_all;
59
60};
61
62struct r300_fragment_shader {
63    /* Parent class */
64    struct pipe_shader_state state;
65
66    /* Currently-bound fragment shader. */
67    struct r300_fragment_shader_code* shader;
68
69    /* List of the same shaders compiled with different texture-compare
70     * states. */
71    struct r300_fragment_shader_code* first;
72};
73
74void r300_shader_read_fs_inputs(struct tgsi_shader_info* info,
75                                struct r300_shader_semantics* fs_inputs);
76
77/* Return TRUE if the shader was switched and should be re-emitted. */
78boolean r300_pick_fragment_shader(struct r300_context* r300);
79
80static INLINE boolean r300_fragment_shader_writes_depth(struct r300_fragment_shader *fs)
81{
82    if (!fs)
83        return FALSE;
84    return (fs->shader->code.writes_depth) ? TRUE : FALSE;
85}
86
87static INLINE boolean r300_fragment_shader_writes_all(struct r300_fragment_shader *fs)
88{
89    if (!fs)
90        return FALSE;
91    return (fs->shader->write_all) ? TRUE : FALSE;
92}
93#endif /* R300_FS_H */
94