summaryrefslogtreecommitdiff
path: root/src/gallium/drivers/r300/r300_fs.c
blob: 79b01bb4dc26ce97534c915f9dc015647b4ea792 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
/*
 * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
 *                Joakim Sindholt <opensource@zhasha.com>
 * Copyright 2009 Marek Olšák <maraeo@gmail.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * on the rights to use, copy, modify, merge, publish, distribute, sub
 * license, and/or sell copies of the Software, and to permit persons to whom
 * the Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 * USE OR OTHER DEALINGS IN THE SOFTWARE. */

#include "tgsi/tgsi_dump.h"

#include "r300_context.h"
#include "r300_screen.h"
#include "r300_fs.h"
#include "r300_tgsi_to_rc.h"

#include "radeon_code.h"
#include "radeon_compiler.h"

/* Convert info about FS input semantics to r300_shader_semantics. */
static void r300_shader_read_fs_inputs(struct tgsi_shader_info* info,
                                       struct r300_shader_semantics* fs_inputs)
{
    int i;
    unsigned index;

    r300_shader_semantics_reset(fs_inputs);

    for (i = 0; i < info->num_inputs; i++) {
        index = info->input_semantic_index[i];

        switch (info->input_semantic_name[i]) {
            case TGSI_SEMANTIC_COLOR:
                assert(index <= ATTR_COLOR_COUNT);
                fs_inputs->color[index] = i;
                break;

            case TGSI_SEMANTIC_GENERIC:
                assert(index <= ATTR_GENERIC_COUNT);
                fs_inputs->generic[index] = i;
                break;

            case TGSI_SEMANTIC_FOG:
                assert(index == 0);
                fs_inputs->fog = i;
                break;

            default:
                assert(0);
        }
    }
}


static void find_output_registers(struct r300_fragment_program_compiler * compiler,
                                  struct r300_fragment_shader * fs)
{
    unsigned i;

    /* Mark the outputs as not present initially */
    compiler->OutputColor = fs->info.num_outputs;
    compiler->OutputDepth = fs->info.num_outputs;

    /* Now see where they really are. */
    for(i = 0; i < fs->info.num_outputs; ++i) {
        switch(fs->info.output_semantic_name[i]) {
            case TGSI_SEMANTIC_COLOR:
                compiler->OutputColor = i;
                break;
            case TGSI_SEMANTIC_POSITION:
                compiler->OutputDepth = i;
                break;
        }
    }
}

static void allocate_hardware_inputs(
    struct r300_fragment_program_compiler * c,
    void (*allocate)(void * data, unsigned input, unsigned hwreg),
    void * mydata)
{
    struct r300_shader_semantics* inputs =
        &((struct r300_fragment_shader*)c->UserData)->inputs;
    int i, reg = 0;

    /* Allocate input registers. */
    for (i = 0; i < ATTR_COLOR_COUNT; i++) {
        if (inputs->color[i] != ATTR_UNUSED) {
            allocate(mydata, inputs->color[i], reg++);
        }
    }
    for (i = 0; i < ATTR_GENERIC_COUNT; i++) {
        if (inputs->generic[i] != ATTR_UNUSED) {
            allocate(mydata, inputs->generic[i], reg++);
        }
    }
    if (inputs->fog != ATTR_UNUSED) {
        allocate(mydata, inputs->fog, reg++);
    }
}

void r300_translate_fragment_shader(struct r300_context* r300,
                                    struct r300_fragment_shader* fs)
{
    struct r300_fragment_program_compiler compiler;
    struct tgsi_to_rc ttr;

    /* Initialize. */
    r300_shader_read_fs_inputs(&fs->info, &fs->inputs);

    /* Setup the compiler. */
    memset(&compiler, 0, sizeof(compiler));
    rc_init(&compiler.Base);
    compiler.Base.Debug = DBG_ON(r300, DBG_FP);

    compiler.code = &fs->code;
    compiler.is_r500 = r300_screen(r300->context.screen)->caps->is_r500;
    compiler.AllocateHwInputs = &allocate_hardware_inputs;
    compiler.UserData = fs;

    /* XXX: Program compilation depends on texture compare modes,
     * which are sampler state. Therefore, programs need to be recompiled
     * depending on this state as in the classic Mesa driver.
     *
     * This is not yet handled correctly.
     */

    find_output_registers(&compiler, fs);

    if (compiler.Base.Debug) {
        debug_printf("r300: Initial fragment program\n");
        tgsi_dump(fs->state.tokens, 0);
    }

    /* Translate TGSI to our internal representation */
    ttr.compiler = &compiler.Base;
    ttr.info = &fs->info;

    r300_tgsi_to_rc(&ttr, fs->state.tokens);

    /* Invoke the compiler */
    r3xx_compile_fragment_program(&compiler);
    if (compiler.Base.Error) {
        /* XXX failover maybe? */
        DBG(r300, DBG_FP, "r300: Error compiling fragment program: %s\n",
            compiler.Base.ErrorMsg);
        assert(0);
    }

    /* And, finally... */
    rc_destroy(&compiler.Base);
    fs->translated = TRUE;
}