draw_vs_exec.c revision bef196c7929606bb8c7e9c06fe83a90fc0d95f09 
1/**************************************************************************
2 *
3 * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
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 TUNGSTEN GRAPHICS 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 <keith@tungstengraphics.com>
31  *   Brian Paul
32  */
33
34#include "util/u_math.h"
35#include "util/u_memory.h"
36#include "pipe/p_shader_tokens.h"
37
38#include "draw_private.h"
39#include "draw_context.h"
40#include "draw_vs.h"
41
42#include "tgsi/tgsi_parse.h"
43#include "tgsi/tgsi_scan.h"
44#include "tgsi/tgsi_exec.h"
45
46
47struct exec_vertex_shader {
48   struct draw_vertex_shader base;
49   struct tgsi_exec_machine *machine;
50};
51
52static struct exec_vertex_shader *exec_vertex_shader( struct draw_vertex_shader *vs )
53{
54   return (struct exec_vertex_shader *)vs;
55}
56
57
58/* Not required for run_linear.
59 */
60static void
61vs_exec_prepare( struct draw_vertex_shader *shader,
62		 struct draw_context *draw )
63{
64   struct exec_vertex_shader *evs = exec_vertex_shader(shader);
65
66   /* Specify the vertex program to interpret/execute.
67    * Avoid rebinding when possible.
68    */
69   if (evs->machine->Tokens != shader->state.tokens) {
70      tgsi_exec_machine_bind_shader(evs->machine,
71                                    shader->state.tokens,
72                                    draw->vs.tgsi.num_samplers,
73                                    draw->vs.tgsi.samplers);
74   }
75}
76
77
78
79
80/* Simplified vertex shader interface for the pt paths.  Given the
81 * complexity of code-generating all the above operations together,
82 * it's time to try doing all the other stuff separately.
83 */
84static void
85vs_exec_run_linear( struct draw_vertex_shader *shader,
86		    const float (*input)[4],
87		    float (*output)[4],
88                    const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
89                    const unsigned const_size[PIPE_MAX_CONSTANT_BUFFERS],
90		    unsigned count,
91		    unsigned input_stride,
92		    unsigned output_stride )
93{
94   struct exec_vertex_shader *evs = exec_vertex_shader(shader);
95   struct tgsi_exec_machine *machine = evs->machine;
96   unsigned int i, j;
97   unsigned slot;
98   boolean clamp_vertex_color = shader->draw->rasterizer->clamp_vertex_color;
99
100   tgsi_exec_set_constant_buffers(machine, PIPE_MAX_CONSTANT_BUFFERS,
101                                  constants, const_size);
102
103   if (shader->info.uses_instanceid) {
104      unsigned i = machine->SysSemanticToIndex[TGSI_SEMANTIC_INSTANCEID];
105      assert(i < Elements(machine->SystemValue));
106      for (j = 0; j < TGSI_QUAD_SIZE; j++)
107         machine->SystemValue[i].i[j] = shader->draw->instance_id;
108   }
109
110   for (i = 0; i < count; i += MAX_TGSI_VERTICES) {
111      unsigned int max_vertices = MIN2(MAX_TGSI_VERTICES, count - i);
112
113      /* Swizzle inputs.
114       */
115      for (j = 0; j < max_vertices; j++) {
116#if 0
117         debug_printf("%d) Input vert:\n", i + j);
118         for (slot = 0; slot < shader->info.num_inputs; slot++) {
119            debug_printf("\t%d: %f %f %f %f\n", slot,
120			 input[slot][0],
121			 input[slot][1],
122			 input[slot][2],
123			 input[slot][3]);
124         }
125#endif
126
127         if (shader->info.uses_vertexid) {
128            unsigned vid = machine->SysSemanticToIndex[TGSI_SEMANTIC_VERTEXID];
129            assert(vid < Elements(machine->SystemValue));
130            machine->SystemValue[vid].i[j] = i + j;
131         }
132
133         for (slot = 0; slot < shader->info.num_inputs; slot++) {
134#if 0
135            assert(!util_is_inf_or_nan(input[slot][0]));
136            assert(!util_is_inf_or_nan(input[slot][1]));
137            assert(!util_is_inf_or_nan(input[slot][2]));
138            assert(!util_is_inf_or_nan(input[slot][3]));
139#endif
140            machine->Inputs[slot].xyzw[0].f[j] = input[slot][0];
141            machine->Inputs[slot].xyzw[1].f[j] = input[slot][1];
142            machine->Inputs[slot].xyzw[2].f[j] = input[slot][2];
143            machine->Inputs[slot].xyzw[3].f[j] = input[slot][3];
144         }
145
146	 input = (const float (*)[4])((const char *)input + input_stride);
147      }
148
149      tgsi_set_exec_mask(machine,
150                         1,
151                         max_vertices > 1,
152                         max_vertices > 2,
153                         max_vertices > 3);
154
155      /* run interpreter */
156      tgsi_exec_machine_run( machine );
157
158      /* Unswizzle all output results.
159       */
160      for (j = 0; j < max_vertices; j++) {
161         for (slot = 0; slot < shader->info.num_outputs; slot++) {
162            unsigned name = shader->info.output_semantic_name[slot];
163            if(clamp_vertex_color &&
164                  (name == TGSI_SEMANTIC_COLOR || name == TGSI_SEMANTIC_BCOLOR))
165            {
166               output[slot][0] = CLAMP(machine->Outputs[slot].xyzw[0].f[j], 0.0f, 1.0f);
167               output[slot][1] = CLAMP(machine->Outputs[slot].xyzw[1].f[j], 0.0f, 1.0f);
168               output[slot][2] = CLAMP(machine->Outputs[slot].xyzw[2].f[j], 0.0f, 1.0f);
169               output[slot][3] = CLAMP(machine->Outputs[slot].xyzw[3].f[j], 0.0f, 1.0f);
170            }
171            else if (name == TGSI_SEMANTIC_FOG) {
172               output[slot][0] = machine->Outputs[slot].xyzw[0].f[j];
173               output[slot][1] = 0;
174               output[slot][2] = 0;
175               output[slot][3] = 1;
176	    } else
177            {
178               output[slot][0] = machine->Outputs[slot].xyzw[0].f[j];
179               output[slot][1] = machine->Outputs[slot].xyzw[1].f[j];
180               output[slot][2] = machine->Outputs[slot].xyzw[2].f[j];
181               output[slot][3] = machine->Outputs[slot].xyzw[3].f[j];
182            }
183         }
184
185#if 0
186	 debug_printf("%d) Post xform vert:\n", i + j);
187	 for (slot = 0; slot < shader->info.num_outputs; slot++) {
188	    debug_printf("\t%d: %f %f %f %f\n", slot,
189			 output[slot][0],
190			 output[slot][1],
191			 output[slot][2],
192			 output[slot][3]);
193            assert(!util_is_inf_or_nan(output[slot][0]));
194         }
195#endif
196
197	 output = (float (*)[4])((char *)output + output_stride);
198      }
199
200   }
201}
202
203
204
205
206static void
207vs_exec_delete( struct draw_vertex_shader *dvs )
208{
209   FREE((void*) dvs->state.tokens);
210   FREE( dvs );
211}
212
213
214struct draw_vertex_shader *
215draw_create_vs_exec(struct draw_context *draw,
216		    const struct pipe_shader_state *state)
217{
218   struct exec_vertex_shader *vs = CALLOC_STRUCT( exec_vertex_shader );
219
220   if (vs == NULL)
221      return NULL;
222
223   /* we make a private copy of the tokens */
224   vs->base.state.tokens = tgsi_dup_tokens(state->tokens);
225   if (!vs->base.state.tokens) {
226      FREE(vs);
227      return NULL;
228   }
229
230   tgsi_scan_shader(state->tokens, &vs->base.info);
231
232   vs->base.state.stream_output = state->stream_output;
233   vs->base.draw = draw;
234   vs->base.prepare = vs_exec_prepare;
235   vs->base.run_linear = vs_exec_run_linear;
236   vs->base.delete = vs_exec_delete;
237   vs->base.create_variant = draw_vs_create_variant_generic;
238   vs->machine = draw->vs.tgsi.machine;
239
240   return &vs->base;
241}
242