1 /**************************************************************************
2 *
3 * Copyright 2007 VMware, Inc.
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 VMWARE AND/OR ITS SUPPLIERS 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 /*
29 * Authors:
30 * Keith Whitwell <keithw@vmware.com>
31 * Brian Paul
32 */
33
34 #include "util/u_math.h"
35 #include "util/u_memory.h"
36 #include "util/ralloc.h"
37 #include "pipe/p_shader_tokens.h"
38 #include "pipe/p_context.h"
39 #include "nir/nir_to_tgsi.h"
40
41 #include "draw_private.h"
42 #include "draw_context.h"
43 #include "draw_vs.h"
44
45 #include "tgsi/tgsi_parse.h"
46 #include "tgsi/tgsi_scan.h"
47 #include "tgsi/tgsi_exec.h"
48
49
50 struct exec_vertex_shader {
51 struct draw_vertex_shader base;
52 struct tgsi_exec_machine *machine;
53 };
54
55
56 static struct exec_vertex_shader *
exec_vertex_shader(struct draw_vertex_shader * vs)57 exec_vertex_shader(struct draw_vertex_shader *vs)
58 {
59 return (struct exec_vertex_shader *)vs;
60 }
61
62
63 /* Not required for run_linear.
64 */
65 static void
vs_exec_prepare(struct draw_vertex_shader * shader,struct draw_context * draw)66 vs_exec_prepare(struct draw_vertex_shader *shader,
67 struct draw_context *draw)
68 {
69 struct exec_vertex_shader *evs = exec_vertex_shader(shader);
70
71 debug_assert(!draw->llvm);
72 /* Specify the vertex program to interpret/execute.
73 * Avoid rebinding when possible.
74 */
75 if (evs->machine->Tokens != shader->state.tokens) {
76 tgsi_exec_machine_bind_shader(evs->machine,
77 shader->state.tokens,
78 draw->vs.tgsi.sampler,
79 draw->vs.tgsi.image,
80 draw->vs.tgsi.buffer);
81 }
82 }
83
84
85
86 /**
87 * Simplified vertex shader interface for the pt paths. Given the
88 * complexity of code-generating all the above operations together,
89 * it's time to try doing all the other stuff separately.
90 */
91 static void
vs_exec_run_linear(struct draw_vertex_shader * shader,const float (* input)[4],float (* output)[4],const void * constants[PIPE_MAX_CONSTANT_BUFFERS],const unsigned const_size[PIPE_MAX_CONSTANT_BUFFERS],unsigned count,unsigned input_stride,unsigned output_stride,const unsigned * fetch_elts)92 vs_exec_run_linear(struct draw_vertex_shader *shader,
93 const float (*input)[4],
94 float (*output)[4],
95 const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
96 const unsigned const_size[PIPE_MAX_CONSTANT_BUFFERS],
97 unsigned count,
98 unsigned input_stride,
99 unsigned output_stride,
100 const unsigned *fetch_elts)
101 {
102 struct exec_vertex_shader *evs = exec_vertex_shader(shader);
103 struct tgsi_exec_machine *machine = evs->machine;
104 unsigned int i, j;
105 unsigned slot;
106 boolean clamp_vertex_color = shader->draw->rasterizer->clamp_vertex_color;
107
108 debug_assert(!shader->draw->llvm);
109 tgsi_exec_set_constant_buffers(machine, PIPE_MAX_CONSTANT_BUFFERS,
110 constants, const_size);
111
112 if (shader->info.uses_instanceid) {
113 unsigned i = machine->SysSemanticToIndex[TGSI_SEMANTIC_INSTANCEID];
114 assert(i < ARRAY_SIZE(machine->SystemValue));
115 for (j = 0; j < TGSI_QUAD_SIZE; j++)
116 machine->SystemValue[i].xyzw[0].i[j] = shader->draw->instance_id;
117 }
118
119 for (i = 0; i < count; i += MAX_TGSI_VERTICES) {
120 unsigned int max_vertices = MIN2(MAX_TGSI_VERTICES, count - i);
121
122 /* Swizzle inputs.
123 */
124 for (j = 0; j < max_vertices; j++) {
125 #if 0
126 debug_printf("%d) Input vert:\n", i + j);
127 for (slot = 0; slot < shader->info.num_inputs; slot++) {
128 debug_printf("\t%d: %f %f %f %f\n", slot,
129 input[slot][0],
130 input[slot][1],
131 input[slot][2],
132 input[slot][3]);
133 }
134 #endif
135 int basevertex = shader->draw->pt.user.eltSize ? shader->draw->pt.user.eltBias : shader->draw->start_index;
136
137 if (shader->info.uses_vertexid) {
138 unsigned vid = machine->SysSemanticToIndex[TGSI_SEMANTIC_VERTEXID];
139 assert(vid < ARRAY_SIZE(machine->SystemValue));
140 machine->SystemValue[vid].xyzw[0].i[j] = fetch_elts ? fetch_elts[i + j] : (i + j + basevertex);
141 }
142 if (shader->info.uses_basevertex) {
143 unsigned vid = machine->SysSemanticToIndex[TGSI_SEMANTIC_BASEVERTEX];
144 assert(vid < ARRAY_SIZE(machine->SystemValue));
145 machine->SystemValue[vid].xyzw[0].i[j] = basevertex;
146 }
147 if (shader->info.uses_vertexid_nobase) {
148 unsigned vid = machine->SysSemanticToIndex[TGSI_SEMANTIC_VERTEXID_NOBASE];
149 assert(vid < ARRAY_SIZE(machine->SystemValue));
150 machine->SystemValue[vid].xyzw[0].i[j] = fetch_elts ? (fetch_elts[i + j] - basevertex) : (i + j);
151 }
152
153 for (slot = 0; slot < shader->info.num_inputs; slot++) {
154 #if 0
155 assert(!util_is_inf_or_nan(input[slot][0]));
156 assert(!util_is_inf_or_nan(input[slot][1]));
157 assert(!util_is_inf_or_nan(input[slot][2]));
158 assert(!util_is_inf_or_nan(input[slot][3]));
159 #endif
160 machine->Inputs[slot].xyzw[0].f[j] = input[slot][0];
161 machine->Inputs[slot].xyzw[1].f[j] = input[slot][1];
162 machine->Inputs[slot].xyzw[2].f[j] = input[slot][2];
163 machine->Inputs[slot].xyzw[3].f[j] = input[slot][3];
164 }
165
166 input = (const float (*)[4])((const char *)input + input_stride);
167 }
168
169 machine->NonHelperMask = (1 << max_vertices) - 1;
170 /* run interpreter */
171 tgsi_exec_machine_run(machine, 0);
172
173 /* Unswizzle all output results.
174 */
175 for (j = 0; j < max_vertices; j++) {
176 for (slot = 0; slot < shader->info.num_outputs; slot++) {
177 enum tgsi_semantic name = shader->info.output_semantic_name[slot];
178 if (clamp_vertex_color &&
179 (name == TGSI_SEMANTIC_COLOR || name == TGSI_SEMANTIC_BCOLOR)) {
180 output[slot][0] = SATURATE(machine->Outputs[slot].xyzw[0].f[j]);
181 output[slot][1] = SATURATE(machine->Outputs[slot].xyzw[1].f[j]);
182 output[slot][2] = SATURATE(machine->Outputs[slot].xyzw[2].f[j]);
183 output[slot][3] = SATURATE(machine->Outputs[slot].xyzw[3].f[j]);
184 } else {
185 output[slot][0] = machine->Outputs[slot].xyzw[0].f[j];
186 output[slot][1] = machine->Outputs[slot].xyzw[1].f[j];
187 output[slot][2] = machine->Outputs[slot].xyzw[2].f[j];
188 output[slot][3] = machine->Outputs[slot].xyzw[3].f[j];
189 }
190 }
191
192 #if 0
193 debug_printf("%d) Post xform vert:\n", i + j);
194 for (slot = 0; slot < shader->info.num_outputs; slot++) {
195 debug_printf("\t%d: %f %f %f %f\n", slot,
196 output[slot][0],
197 output[slot][1],
198 output[slot][2],
199 output[slot][3]);
200 assert(!util_is_inf_or_nan(output[slot][0]));
201 }
202 #endif
203
204 output = (float (*)[4])((char *)output + output_stride);
205 }
206 }
207 }
208
209
210 static void
vs_exec_delete(struct draw_vertex_shader * dvs)211 vs_exec_delete(struct draw_vertex_shader *dvs)
212 {
213 FREE((void*) dvs->state.tokens);
214 FREE(dvs);
215 }
216
217
218 struct draw_vertex_shader *
draw_create_vs_exec(struct draw_context * draw,const struct pipe_shader_state * state)219 draw_create_vs_exec(struct draw_context *draw,
220 const struct pipe_shader_state *state)
221 {
222 struct exec_vertex_shader *vs = CALLOC_STRUCT(exec_vertex_shader);
223
224 if (!vs)
225 return NULL;
226
227 if (state->type == PIPE_SHADER_IR_NIR) {
228 vs->base.state.type = PIPE_SHADER_IR_TGSI;
229 vs->base.state.tokens = nir_to_tgsi(state->ir.nir, draw->pipe->screen);
230 } else {
231 assert(state->type == PIPE_SHADER_IR_TGSI);
232 vs->base.state.type = state->type;
233
234 /* we need to keep a local copy of the tokens */
235 vs->base.state.tokens = tgsi_dup_tokens(state->tokens);
236 if (!vs->base.state.tokens) {
237 FREE(vs);
238 return NULL;
239 }
240 }
241
242 tgsi_scan_shader(vs->base.state.tokens, &vs->base.info);
243
244 vs->base.state.stream_output = state->stream_output;
245 vs->base.draw = draw;
246 vs->base.prepare = vs_exec_prepare;
247 vs->base.run_linear = vs_exec_run_linear;
248 vs->base.delete = vs_exec_delete;
249 vs->base.create_variant = draw_vs_create_variant_generic;
250 vs->machine = draw->vs.tgsi.machine;
251
252 return &vs->base;
253 }
254