r300_fs.c revision 6a448a525baf81173f92ee8c3074b98baa54397b 
1/*
2 * Copyright 2008 Corbin Simpson <MostAwesomeDude@gmail.com>
3 *                Joakim Sindholt <opensource@zhasha.com>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a
6 * copy of this software and associated documentation files (the "Software"),
7 * to deal in the Software without restriction, including without limitation
8 * on the rights to use, copy, modify, merge, publish, distribute, sub
9 * license, and/or sell copies of the Software, and to permit persons to whom
10 * the Software is furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice (including the next
13 * paragraph) shall be included in all copies or substantial portions of the
14 * Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
22 * USE OR OTHER DEALINGS IN THE SOFTWARE. */
23
24#include "tgsi/tgsi_dump.h"
25
26#include "r300_context.h"
27#include "r300_screen.h"
28#include "r300_fs.h"
29#include "r300_tgsi_to_rc.h"
30
31#include "radeon_code.h"
32#include "radeon_compiler.h"
33
34static void find_output_registers(struct r300_fragment_program_compiler * compiler,
35                                  struct r300_fragment_shader * fs)
36{
37    unsigned i;
38
39    /* Mark the outputs as not present initially */
40    compiler->OutputColor = fs->info.num_outputs;
41    compiler->OutputDepth = fs->info.num_outputs;
42
43    /* Now see where they really are. */
44    for(i = 0; i < fs->info.num_outputs; ++i) {
45        switch(fs->info.output_semantic_name[i]) {
46            case TGSI_SEMANTIC_COLOR:
47                compiler->OutputColor = i;
48                break;
49            case TGSI_SEMANTIC_POSITION:
50                compiler->OutputDepth = i;
51                break;
52        }
53    }
54}
55
56static void allocate_hardware_inputs(
57    struct r300_fragment_program_compiler * c,
58    void (*allocate)(void * data, unsigned input, unsigned hwreg),
59    void * mydata)
60{
61    struct tgsi_shader_info* info = &((struct r300_fragment_shader*)c->UserData)->info;
62    int total_colors = 0;
63    int colors = 0;
64    int total_generic = 0;
65    int generic = 0;
66    int i;
67
68    for (i = 0; i < info->num_inputs; i++) {
69        switch (info->input_semantic_name[i]) {
70            case TGSI_SEMANTIC_COLOR:
71                total_colors++;
72                break;
73            case TGSI_SEMANTIC_FOG:
74            case TGSI_SEMANTIC_GENERIC:
75                total_generic++;
76                break;
77        }
78    }
79
80    for(i = 0; i < info->num_inputs; i++) {
81        switch (info->input_semantic_name[i]) {
82            case TGSI_SEMANTIC_COLOR:
83                allocate(mydata, i, colors);
84                colors++;
85                break;
86            case TGSI_SEMANTIC_FOG:
87            case TGSI_SEMANTIC_GENERIC:
88                allocate(mydata, i, total_colors + generic);
89                generic++;
90                break;
91        }
92    }
93}
94
95void r300_translate_fragment_shader(struct r300_context* r300,
96                                    struct r300_fragment_shader* fs)
97{
98    struct r300_fragment_program_compiler compiler;
99    struct tgsi_to_rc ttr;
100
101    memset(&compiler, 0, sizeof(compiler));
102    rc_init(&compiler.Base);
103    compiler.Base.Debug = DBG_ON(r300, DBG_FP);
104
105    compiler.code = &fs->code;
106    compiler.is_r500 = r300_screen(r300->context.screen)->caps->is_r500;
107    compiler.AllocateHwInputs = &allocate_hardware_inputs;
108    compiler.UserData = fs;
109
110    /* TODO: Program compilation depends on texture compare modes,
111     * which are sampler state. Therefore, programs need to be recompiled
112     * depending on this state as in the classic Mesa driver.
113     *
114     * This is not yet handled correctly.
115     */
116
117    find_output_registers(&compiler, fs);
118
119    if (compiler.Base.Debug) {
120        debug_printf("r300: Initial fragment program\n");
121        tgsi_dump(fs->state.tokens, 0);
122    }
123
124    /* Translate TGSI to our internal representation */
125    ttr.compiler = &compiler.Base;
126    ttr.info = &fs->info;
127
128    r300_tgsi_to_rc(&ttr, fs->state.tokens);
129
130    /* Invoke the compiler */
131    r3xx_compile_fragment_program(&compiler);
132    if (compiler.Base.Error) {
133        /* Todo: Fallback to software rendering gracefully? */
134        fprintf(stderr, "r300 FP: Compiler error: %s\n", compiler.Base.ErrorMsg);
135
136        if (compiler.is_r500) {
137            memcpy(compiler.code, &r5xx_passthrough_fragment_shader, sizeof(r5xx_passthrough_fragment_shader));
138        } else {
139            memcpy(compiler.code, &r3xx_passthrough_fragment_shader, sizeof(r3xx_passthrough_fragment_shader));
140        }
141    }
142
143    /* And, finally... */
144    rc_destroy(&compiler.Base);
145    fs->translated = TRUE;
146}
147