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
   8  * "Software"), to deal in the Software without restriction, including
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  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
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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                                     draw->vs.tgsi.image,
  75                                     draw->vs.tgsi.buffer);
  76    }
  77 }
  78
  79
  80
  81
  82 /* Simplified vertex shader interface for the pt paths.  Given the
  83  * complexity of code-generating all the above operations together,
  84  * it's time to try doing all the other stuff separately.
  85  */
  86 static void
  87 vs_exec_run_linear( struct draw_vertex_shader *shader,
  88                     const float (*input)[4],
  89                     float (*output)[4],
  90                     const void *constants[PIPE_MAX_CONSTANT_BUFFERS],
  91                     const unsigned const_size[PIPE_MAX_CONSTANT_BUFFERS],
  92                     unsigned count,
  93                     unsigned input_stride,
  94                     unsigned output_stride )
  95 {
  96    struct exec_vertex_shader *evs = exec_vertex_shader(shader);
  97    struct tgsi_exec_machine *machine = evs->machine;
  98    unsigned int i, j;
  99    unsigned slot;
 100    boolean clamp_vertex_color = shader->draw->rasterizer->clamp_vertex_color;
 101
 102    debug_assert(!shader->draw->llvm);
 103    tgsi_exec_set_constant_buffers(machine, PIPE_MAX_CONSTANT_BUFFERS,
 104                                   constants, const_size);
 105
 106    if (shader->info.uses_instanceid) {
 107       unsigned i = machine->SysSemanticToIndex[TGSI_SEMANTIC_INSTANCEID];
 108       assert(i < ARRAY_SIZE(machine->SystemValue));
 109       for (j = 0; j < TGSI_QUAD_SIZE; j++)
 110          machine->SystemValue[i].xyzw[0].i[j] = shader->draw->instance_id;
 111    }
 112
 113    for (i = 0; i < count; i += MAX_TGSI_VERTICES) {
 114       unsigned int max_vertices = MIN2(MAX_TGSI_VERTICES, count - i);
 115
 116       /* Swizzle inputs.
 117        */
 118       for (j = 0; j < max_vertices; j++) {
 119 #if 0
 120          debug_printf("%d) Input vert:\n", i + j);
 121          for (slot = 0; slot < shader->info.num_inputs; slot++) {
 122             debug_printf("\t%d: %f %f %f %f\n", slot,
 123                          input[slot][0],
 124                          input[slot][1],
 125                          input[slot][2],
 126                          input[slot][3]);
 127          }
 128 #endif
 129
 130          if (shader->info.uses_vertexid) {
 131             unsigned vid = machine->SysSemanticToIndex[TGSI_SEMANTIC_VERTEXID];
 132             assert(vid < ARRAY_SIZE(machine->SystemValue));
 133             machine->SystemValue[vid].xyzw[0].i[j] = i + j;
 134             /* XXX this should include base vertex. Where to get it??? */
 135          }
 136          if (shader->info.uses_basevertex) {
 137             unsigned vid = machine->SysSemanticToIndex[TGSI_SEMANTIC_BASEVERTEX];
 138             assert(vid < ARRAY_SIZE(machine->SystemValue));
 139             machine->SystemValue[vid].xyzw[0].i[j] = 0;
 140             /* XXX Where to get it??? */
 141          }
 142          if (shader->info.uses_vertexid_nobase) {
 143             unsigned vid = machine->SysSemanticToIndex[TGSI_SEMANTIC_VERTEXID_NOBASE];
 144             assert(vid < ARRAY_SIZE(machine->SystemValue));
 145             machine->SystemValue[vid].xyzw[0].i[j] = i + j;
 146          }
 147
 148          for (slot = 0; slot < shader->info.num_inputs; slot++) {
 149 #if 0
 150             assert(!util_is_inf_or_nan(input[slot][0]));
 151             assert(!util_is_inf_or_nan(input[slot][1]));
 152             assert(!util_is_inf_or_nan(input[slot][2]));
 153             assert(!util_is_inf_or_nan(input[slot][3]));
 154 #endif
 155             machine->Inputs[slot].xyzw[0].f[j] = input[slot][0];
 156             machine->Inputs[slot].xyzw[1].f[j] = input[slot][1];
 157             machine->Inputs[slot].xyzw[2].f[j] = input[slot][2];
 158             machine->Inputs[slot].xyzw[3].f[j] = input[slot][3];
 159          }
 160
 161          input = (const float (*)[4])((const char *)input + input_stride);
 162       }
 163
 164       machine->NonHelperMask = (1 << max_vertices) - 1;
 165       /* run interpreter */
 166       tgsi_exec_machine_run( machine, 0 );
 167
 168       /* Unswizzle all output results.
 169        */
 170       for (j = 0; j < max_vertices; j++) {
 171          for (slot = 0; slot < shader->info.num_outputs; slot++) {
 172             unsigned name = shader->info.output_semantic_name[slot];
 173             if(clamp_vertex_color &&
 174                   (name == TGSI_SEMANTIC_COLOR || name == TGSI_SEMANTIC_BCOLOR))
 175             {
 176                output[slot][0] = CLAMP(machine->Outputs[slot].xyzw[0].f[j], 0.0f, 1.0f);
 177                output[slot][1] = CLAMP(machine->Outputs[slot].xyzw[1].f[j], 0.0f, 1.0f);
 178                output[slot][2] = CLAMP(machine->Outputs[slot].xyzw[2].f[j], 0.0f, 1.0f);
 179                output[slot][3] = CLAMP(machine->Outputs[slot].xyzw[3].f[j], 0.0f, 1.0f);
 180             }
 181             else
 182             {
 183                output[slot][0] = machine->Outputs[slot].xyzw[0].f[j];
 184                output[slot][1] = machine->Outputs[slot].xyzw[1].f[j];
 185                output[slot][2] = machine->Outputs[slot].xyzw[2].f[j];
 186                output[slot][3] = machine->Outputs[slot].xyzw[3].f[j];
 187             }
 188          }
 189
 190 #if 0
 191          debug_printf("%d) Post xform vert:\n", i + j);
 192          for (slot = 0; slot < shader->info.num_outputs; slot++) {
 193             debug_printf("\t%d: %f %f %f %f\n", slot,
 194                          output[slot][0],
 195                          output[slot][1],
 196                          output[slot][2],
 197                          output[slot][3]);
 198             assert(!util_is_inf_or_nan(output[slot][0]));
 199          }
 200 #endif
 201
 202          output = (float (*)[4])((char *)output + output_stride);
 203       }
 204
 205    }
 206 }
 207
 208
 209
 210
 211 static void
 212 vs_exec_delete( struct draw_vertex_shader *dvs )
 213 {
 214    FREE((void*) dvs->state.tokens);
 215    FREE( dvs );
 216 }
 217
 218
 219 struct draw_vertex_shader *
 220 draw_create_vs_exec(struct draw_context *draw,
 221                     const struct pipe_shader_state *state)
 222 {
 223    struct exec_vertex_shader *vs = CALLOC_STRUCT( exec_vertex_shader );
 224
 225    if (!vs)
 226       return NULL;
 227
 228    /* we make a private copy of the tokens */
 229    vs->base.state.tokens = tgsi_dup_tokens(state->tokens);
 230    if (!vs->base.state.tokens) {
 231       FREE(vs);
 232       return NULL;
 233    }
 234
 235    tgsi_scan_shader(state->tokens, &vs->base.info);
 236
 237    vs->base.state.stream_output = state->stream_output;
 238    vs->base.draw = draw;
 239    vs->base.prepare = vs_exec_prepare;
 240    vs->base.run_linear = vs_exec_run_linear;
 241    vs->base.delete = vs_exec_delete;
 242    vs->base.create_variant = draw_vs_create_variant_generic;
 243    vs->machine = draw->vs.tgsi.machine;
 244
 245    return &vs->base;
 246 }