summaryrefslogtreecommitdiff
path: root/src/gallium/drivers/r300/r300_vs.c
blob: 33612a322f79ebf065120e8cdccc46da286db72d (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
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
/*
 * Copyright 2009 Corbin Simpson <MostAwesomeDude@gmail.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 "r300_vs.h"

#include "r300_context.h"
#include "r300_screen.h"
#include "r300_tgsi_to_rc.h"
#include "r300_reg.h"

#include "tgsi/tgsi_dump.h"
#include "tgsi/tgsi_parse.h"
#include "tgsi/tgsi_ureg.h"

#include "compiler/radeon_compiler.h"

/* Convert info about VS output semantics into r300_shader_semantics. */
static void r300_shader_read_vs_outputs(
    struct r300_context *r300,
    struct tgsi_shader_info* info,
    struct r300_shader_semantics* vs_outputs)
{
    int i;
    unsigned index;

    r300_shader_semantics_reset(vs_outputs);

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

        switch (info->output_semantic_name[i]) {
            case TGSI_SEMANTIC_POSITION:
                assert(index == 0);
                vs_outputs->pos = i;
                break;

            case TGSI_SEMANTIC_PSIZE:
                assert(index == 0);
                vs_outputs->psize = i;
                break;

            case TGSI_SEMANTIC_COLOR:
                assert(index < ATTR_COLOR_COUNT);
                vs_outputs->color[index] = i;
                break;

            case TGSI_SEMANTIC_BCOLOR:
                assert(index < ATTR_COLOR_COUNT);
                vs_outputs->bcolor[index] = i;
                break;

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

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

            case TGSI_SEMANTIC_EDGEFLAG:
                assert(index == 0);
                fprintf(stderr, "r300 VP: cannot handle edgeflag output.\n");
                break;

            case TGSI_SEMANTIC_CLIPVERTEX:
                assert(index == 0);
                /* Draw does clip vertex for us. */
                if (r300->screen->caps.has_tcl) {
                    fprintf(stderr, "r300 VP: cannot handle clip vertex output.\n");
                }
                break;

            default:
                fprintf(stderr, "r300 VP: unknown vertex output semantic: %i.\n",
                        info->output_semantic_name[i]);
        }
    }

    /* WPOS is a straight copy of POSITION and it's always emitted. */
    vs_outputs->wpos = i;
}

static void set_vertex_inputs_outputs(struct r300_vertex_program_compiler * c)
{
    struct r300_vertex_shader * vs = c->UserData;
    struct r300_shader_semantics* outputs = &vs->outputs;
    struct tgsi_shader_info* info = &vs->info;
    int i, reg = 0;
    boolean any_bcolor_used = outputs->bcolor[0] != ATTR_UNUSED ||
                              outputs->bcolor[1] != ATTR_UNUSED;

    /* Fill in the input mapping */
    for (i = 0; i < info->num_inputs; i++)
        c->code->inputs[i] = i;

    /* Position. */
    if (outputs->pos != ATTR_UNUSED) {
        c->code->outputs[outputs->pos] = reg++;
    } else {
        assert(0);
    }

    /* Point size. */
    if (outputs->psize != ATTR_UNUSED) {
        c->code->outputs[outputs->psize] = reg++;
    }

    /* If we're writing back facing colors we need to send
     * four colors to make front/back face colors selection work.
     * If the vertex program doesn't write all 4 colors, lets
     * pretend it does by skipping output index reg so the colors
     * get written into appropriate output vectors.
     */

    /* Colors. */
    for (i = 0; i < ATTR_COLOR_COUNT; i++) {
        if (outputs->color[i] != ATTR_UNUSED) {
            c->code->outputs[outputs->color[i]] = reg++;
        } else if (any_bcolor_used ||
                   outputs->color[1] != ATTR_UNUSED) {
            reg++;
        }
    }

    /* Back-face colors. */
    for (i = 0; i < ATTR_COLOR_COUNT; i++) {
        if (outputs->bcolor[i] != ATTR_UNUSED) {
            c->code->outputs[outputs->bcolor[i]] = reg++;
        } else if (any_bcolor_used) {
            reg++;
        }
    }

    /* Texture coordinates. */
    for (i = 0; i < ATTR_GENERIC_COUNT; i++) {
        if (outputs->generic[i] != ATTR_UNUSED) {
            c->code->outputs[outputs->generic[i]] = reg++;
        }
    }

    /* Fog coordinates. */
    if (outputs->fog != ATTR_UNUSED) {
        c->code->outputs[outputs->fog] = reg++;
    }

    /* WPOS. */
    c->code->outputs[outputs->wpos] = reg++;
}

void r300_init_vs_outputs(struct r300_context *r300,
                          struct r300_vertex_shader *vs)
{
    tgsi_scan_shader(vs->state.tokens, &vs->info);
    r300_shader_read_vs_outputs(r300, &vs->info, &vs->outputs);
}

static void r300_dummy_vertex_shader(
    struct r300_context* r300,
    struct r300_vertex_shader* shader)
{
    struct ureg_program *ureg;
    struct ureg_dst dst;
    struct ureg_src imm;

    /* Make a simple vertex shader which outputs (0, 0, 0, 1),
     * effectively rendering nothing. */
    ureg = ureg_create(TGSI_PROCESSOR_VERTEX);
    dst = ureg_DECL_output(ureg, TGSI_SEMANTIC_POSITION, 0);
    imm = ureg_imm4f(ureg, 0, 0, 0, 1);

    ureg_MOV(ureg, dst, imm);
    ureg_END(ureg);

    shader->state.tokens = tgsi_dup_tokens(ureg_finalize(ureg));
    ureg_destroy(ureg);

    shader->dummy = TRUE;
    r300_init_vs_outputs(r300, shader);
    r300_translate_vertex_shader(r300, shader);
}

void r300_translate_vertex_shader(struct r300_context *r300,
                                  struct r300_vertex_shader *vs)
{
    struct r300_vertex_program_compiler compiler;
    struct tgsi_to_rc ttr;
    unsigned i;

    /* Setup the compiler */
    memset(&compiler, 0, sizeof(compiler));
    rc_init(&compiler.Base, NULL);

    DBG_ON(r300, DBG_VP) ? compiler.Base.Debug |= RC_DBG_LOG : 0;
    DBG_ON(r300, DBG_P_STAT) ? compiler.Base.Debug |= RC_DBG_STATS : 0;
    compiler.code = &vs->code;
    compiler.UserData = vs;
    compiler.Base.is_r500 = r300->screen->caps.is_r500;
    compiler.Base.disable_optimizations = DBG_ON(r300, DBG_NO_OPT);
    compiler.Base.has_half_swizzles = FALSE;
    compiler.Base.has_presub = FALSE;
    compiler.Base.has_omod = FALSE;
    compiler.Base.max_temp_regs = 32;
    compiler.Base.max_constants = 256;
    compiler.Base.max_alu_insts = r300->screen->caps.is_r500 ? 1024 : 256;

    if (compiler.Base.Debug & RC_DBG_LOG) {
        DBG(r300, DBG_VP, "r300: Initial vertex program\n");
        tgsi_dump(vs->state.tokens, 0);
    }

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

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

    if (ttr.error) {
        fprintf(stderr, "r300 VP: Cannot translate a shader. "
                "Using a dummy shader instead.\n");
        r300_dummy_vertex_shader(r300, vs);
        return;
    }

    if (compiler.Base.Program.Constants.Count > 200) {
        compiler.Base.remove_unused_constants = TRUE;
    }

    compiler.RequiredOutputs = ~(~0 << (vs->info.num_outputs + 1));
    compiler.SetHwInputOutput = &set_vertex_inputs_outputs;

    /* Insert the WPOS output. */
    rc_copy_output(&compiler.Base, 0, vs->outputs.wpos);

    /* Invoke the compiler */
    r3xx_compile_vertex_program(&compiler);
    if (compiler.Base.Error) {
        fprintf(stderr, "r300 VP: Compiler error:\n%sUsing a dummy shader"
                " instead.\n", compiler.Base.ErrorMsg);

        if (vs->dummy) {
            fprintf(stderr, "r300 VP: Cannot compile the dummy shader! "
                    "Giving up...\n");
            abort();
        }

        rc_destroy(&compiler.Base);
        r300_dummy_vertex_shader(r300, vs);
        return;
    }

    /* Initialize numbers of constants for each type. */
    vs->externals_count = 0;
    for (i = 0;
         i < vs->code.constants.Count &&
         vs->code.constants.Constants[i].Type == RC_CONSTANT_EXTERNAL; i++) {
        vs->externals_count = i+1;
    }
    for (; i < vs->code.constants.Count; i++) {
        assert(vs->code.constants.Constants[i].Type == RC_CONSTANT_IMMEDIATE);
    }
    vs->immediates_count = vs->code.constants.Count - vs->externals_count;

    /* And, finally... */
    rc_destroy(&compiler.Base);
}