src/gallium/auxiliary/draw/draw_vs_exec.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 VMware, Inc.
   4  * All Rights Reserved.
   5  *
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   7  * copy of this software and associated documentation files (the
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  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
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  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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  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 "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
  47 struct exec_vertex_shader {
  48    struct draw_vertex_shader base;
  49    struct tgsi_exec_machine *machine;
  50 };
  51
  52 static 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  */
  60 static void
  61 vs_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    debug_assert(!draw->llvm);
  67    /* Specify the vertex program to interpret/execute.
  68     * Avoid rebinding when possible.
  69     */
  70    if (evs->machine->Tokens != shader->state.tokens) {
  71       tgsi_exec_machine_bind_shader(evs->machine,
  72                                     shader->state.tokens,
  73                                     draw->vs.tgsi.sampler);
  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  */
  84 static void
  85 vs_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    debug_assert(!shader->draw->llvm);
 101    tgsi_exec_set_constant_buffers(machine, PIPE_MAX_CONSTANT_BUFFERS,
 102                                   constants, const_size);
 103
 104    if (shader->info.uses_instanceid) {
 105       unsigned i = machine->SysSemanticToIndex[TGSI_SEMANTIC_INSTANCEID];
 106       assert(i < Elements(machine->SystemValue));
 107       for (j = 0; j < TGSI_QUAD_SIZE; j++)
 108          machine->SystemValue[i].i[j] = shader->draw->instance_id;
 109    }
 110
 111    for (i = 0; i < count; i += MAX_TGSI_VERTICES) {
 112       unsigned int max_vertices = MIN2(MAX_TGSI_VERTICES, count - i);
 113
 114       /* Swizzle inputs.
 115        */
 116       for (j = 0; j < max_vertices; j++) {
 117 #if 0
 118          debug_printf("%d) Input vert:\n", i + j);
 119          for (slot = 0; slot < shader->info.num_inputs; slot++) {
 120             debug_printf("\t%d: %f %f %f %f\n", slot,
 121                          input[slot][0],
 122                          input[slot][1],
 123                          input[slot][2],
 124                          input[slot][3]);
 125          }
 126 #endif
 127
 128          if (shader->info.uses_vertexid) {
 129             unsigned vid = machine->SysSemanticToIndex[TGSI_SEMANTIC_VERTEXID];
 130             assert(vid < Elements(machine->SystemValue));
 131             machine->SystemValue[vid].i[j] = i + j;
 132             /* XXX this should include base vertex. Where to get it??? */
 133          }
 134          if (shader->info.uses_basevertex) {
 135             unsigned vid = machine->SysSemanticToIndex[TGSI_SEMANTIC_BASEVERTEX];
 136             assert(vid < Elements(machine->SystemValue));
 137             machine->SystemValue[vid].i[j] = 0;
 138             /* XXX Where to get it??? */
 139          }
 140          if (shader->info.uses_vertexid_nobase) {
 141             unsigned vid = machine->SysSemanticToIndex[TGSI_SEMANTIC_VERTEXID_NOBASE];
 142             assert(vid < Elements(machine->SystemValue));
 143             machine->SystemValue[vid].i[j] = i + j;
 144          }
 145
 146          for (slot = 0; slot < shader->info.num_inputs; slot++) {
 147 #if 0
 148             assert(!util_is_inf_or_nan(input[slot][0]));
 149             assert(!util_is_inf_or_nan(input[slot][1]));
 150             assert(!util_is_inf_or_nan(input[slot][2]));
 151             assert(!util_is_inf_or_nan(input[slot][3]));
 152 #endif
 153             machine->Inputs[slot].xyzw[0].f[j] = input[slot][0];
 154             machine->Inputs[slot].xyzw[1].f[j] = input[slot][1];
 155             machine->Inputs[slot].xyzw[2].f[j] = input[slot][2];
 156             machine->Inputs[slot].xyzw[3].f[j] = input[slot][3];
 157          }
 158
 159          input = (const float (*)[4])((const char *)input + input_stride);
 160       }
 161
 162       tgsi_set_exec_mask(machine,
 163                          1,
 164                          max_vertices > 1,
 165                          max_vertices > 2,
 166                          max_vertices > 3);
 167
 168       /* run interpreter */
 169       tgsi_exec_machine_run( machine );
 170
 171       /* Unswizzle all output results.
 172        */
 173       for (j = 0; j < max_vertices; j++) {
 174          for (slot = 0; slot < shader->info.num_outputs; slot++) {
 175             unsigned name = shader->info.output_semantic_name[slot];
 176             if(clamp_vertex_color &&
 177                   (name == TGSI_SEMANTIC_COLOR || name == TGSI_SEMANTIC_BCOLOR))
 178             {
 179                output[slot][0] = CLAMP(machine->Outputs[slot].xyzw[0].f[j], 0.0f, 1.0f);
 180                output[slot][1] = CLAMP(machine->Outputs[slot].xyzw[1].f[j], 0.0f, 1.0f);
 181                output[slot][2] = CLAMP(machine->Outputs[slot].xyzw[2].f[j], 0.0f, 1.0f);
 182                output[slot][3] = CLAMP(machine->Outputs[slot].xyzw[3].f[j], 0.0f, 1.0f);
 183             }
 184             else
 185             {
 186                output[slot][0] = machine->Outputs[slot].xyzw[0].f[j];
 187                output[slot][1] = machine->Outputs[slot].xyzw[1].f[j];
 188                output[slot][2] = machine->Outputs[slot].xyzw[2].f[j];
 189                output[slot][3] = machine->Outputs[slot].xyzw[3].f[j];
 190             }
 191          }
 192
 193 #if 0
 194          debug_printf("%d) Post xform vert:\n", i + j);
 195          for (slot = 0; slot < shader->info.num_outputs; slot++) {
 196             debug_printf("\t%d: %f %f %f %f\n", slot,
 197                          output[slot][0],
 198                          output[slot][1],
 199                          output[slot][2],
 200                          output[slot][3]);
 201             assert(!util_is_inf_or_nan(output[slot][0]));
 202          }
 203 #endif
 204
 205          output = (float (*)[4])((char *)output + output_stride);
 206       }
 207
 208    }
 209 }
 210
 211
 212
 213
 214 static void
 215 vs_exec_delete( struct draw_vertex_shader *dvs )
 216 {
 217    FREE((void*) dvs->state.tokens);
 218    FREE( dvs );
 219 }
 220
 221
 222 struct draw_vertex_shader *
 223 draw_create_vs_exec(struct draw_context *draw,
 224                     const struct pipe_shader_state *state)
 225 {
 226    struct exec_vertex_shader *vs = CALLOC_STRUCT( exec_vertex_shader );
 227
 228    if (!vs)
 229       return NULL;
 230
 231    /* we make a private copy of the tokens */
 232    vs->base.state.tokens = tgsi_dup_tokens(state->tokens);
 233    if (!vs->base.state.tokens) {
 234       FREE(vs);
 235       return NULL;
 236    }
 237
 238    tgsi_scan_shader(state->tokens, &vs->base.info);
 239
 240    vs->base.state.stream_output = state->stream_output;
 241    vs->base.draw = draw;
 242    vs->base.prepare = vs_exec_prepare;
 243    vs->base.run_linear = vs_exec_run_linear;
 244    vs->base.delete = vs_exec_delete;
 245    vs->base.create_variant = draw_vs_create_variant_generic;
 246    vs->machine = draw->vs.tgsi.machine;
 247
 248    return &vs->base;
 249 }