src/gallium/auxiliary/draw/draw_vs_exec.c

   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 "pipe/p_util.h"
  35 #include "pipe/p_shader_tokens.h"
  36
  37 #include "draw_private.h"
  38 #include "draw_context.h"
  39 #include "draw_vs.h"
  40
  41 #include "tgsi/util/tgsi_parse.h"
  42 #include "tgsi/util/tgsi_scan.h"
  43
  44
  45 struct exec_vertex_shader {
  46    struct draw_vertex_shader base;
  47    struct tgsi_exec_machine *machine;
  48 };
  49
  50 static struct exec_vertex_shader *exec_vertex_shader( struct draw_vertex_shader *vs )
  51 {
  52    return (struct exec_vertex_shader *)vs;
  53 }
  54
  55
  56 /* Not required for run_linear.
  57  */
  58 static void
  59 vs_exec_prepare( struct draw_vertex_shader *shader,
  60                  struct draw_context *draw )
  61 {
  62    struct exec_vertex_shader *evs = exec_vertex_shader(shader);
  63
  64    /* specify the vertex program to interpret/execute */
  65    tgsi_exec_machine_bind_shader(evs->machine,
  66                                  shader->state.tokens,
  67                                  PIPE_MAX_SAMPLERS,
  68                                  NULL /*samplers*/ );
  69
  70 }
  71
  72
  73
  74
  75 /* Simplified vertex shader interface for the pt paths.  Given the
  76  * complexity of code-generating all the above operations together,
  77  * it's time to try doing all the other stuff separately.
  78  */
  79 static void
  80 vs_exec_run_linear( struct draw_vertex_shader *shader,
  81                     const float (*input)[4],
  82                     float (*output)[4],
  83                     const float (*constants)[4],
  84                     unsigned count,
  85                     unsigned input_stride,
  86                     unsigned output_stride )
  87 {
  88    struct exec_vertex_shader *evs = exec_vertex_shader(shader);
  89    struct tgsi_exec_machine *machine = evs->machine;
  90    unsigned int i, j;
  91    unsigned slot;
  92
  93    machine->Consts = constants;
  94
  95    for (i = 0; i < count; i += MAX_TGSI_VERTICES) {
  96       unsigned int max_vertices = MIN2(MAX_TGSI_VERTICES, count - i);
  97
  98       /* Swizzle inputs.
  99        */
 100       for (j = 0; j < max_vertices; j++) {
 101 #if 0
 102          debug_printf("%d) Input vert:\n", i + j);
 103          for (slot = 0; slot < shader->info.num_inputs; slot++) {
 104             debug_printf("\t%d: %f %f %f %f\n", slot,
 105                          input[slot][0],
 106                          input[slot][1],
 107                          input[slot][2],
 108                          input[slot][3]);
 109          }
 110 #endif
 111
 112          for (slot = 0; slot < shader->info.num_inputs; slot++) {
 113             machine->Inputs[slot].xyzw[0].f[j] = input[slot][0];
 114             machine->Inputs[slot].xyzw[1].f[j] = input[slot][1];
 115             machine->Inputs[slot].xyzw[2].f[j] = input[slot][2];
 116             machine->Inputs[slot].xyzw[3].f[j] = input[slot][3];
 117          }
 118
 119          input = (const float (*)[4])((const char *)input + input_stride);
 120       }
 121
 122       /* run interpreter */
 123       tgsi_exec_machine_run( machine );
 124
 125       /* Unswizzle all output results.
 126        */
 127       for (j = 0; j < max_vertices; j++) {
 128          for (slot = 0; slot < shader->info.num_outputs; slot++) {
 129             output[slot][0] = machine->Outputs[slot].xyzw[0].f[j];
 130             output[slot][1] = machine->Outputs[slot].xyzw[1].f[j];
 131             output[slot][2] = machine->Outputs[slot].xyzw[2].f[j];
 132             output[slot][3] = machine->Outputs[slot].xyzw[3].f[j];
 133
 134          }
 135
 136 #if 0
 137          debug_printf("%d) Post xform vert:\n", i + j);
 138          for (slot = 0; slot < shader->info.num_outputs; slot++) {
 139             debug_printf("\t%d: %f %f %f %f\n", slot,
 140                          output[slot][0],
 141                          output[slot][1],
 142                          output[slot][2],
 143                          output[slot][3]);
 144          }
 145 #endif
 146
 147          output = (float (*)[4])((char *)output + output_stride);
 148       }
 149
 150    }
 151 }
 152
 153
 154
 155
 156 static void
 157 vs_exec_delete( struct draw_vertex_shader *dvs )
 158 {
 159    FREE((void*) dvs->state.tokens);
 160    FREE( dvs );
 161 }
 162
 163
 164 struct draw_vertex_shader *
 165 draw_create_vs_exec(struct draw_context *draw,
 166                     const struct pipe_shader_state *state)
 167 {
 168    struct exec_vertex_shader *vs = CALLOC_STRUCT( exec_vertex_shader );
 169
 170    if (vs == NULL)
 171       return NULL;
 172
 173    /* we make a private copy of the tokens */
 174    vs->base.state.tokens = tgsi_dup_tokens(state->tokens);
 175    if (!vs->base.state.tokens) {
 176       FREE(vs);
 177       return NULL;
 178    }
 179
 180    tgsi_scan_shader(state->tokens, &vs->base.info);
 181
 182    vs->base.draw = draw;
 183    vs->base.prepare = vs_exec_prepare;
 184    vs->base.run_linear = vs_exec_run_linear;
 185    vs->base.delete = vs_exec_delete;
 186    vs->base.create_varient = draw_vs_varient_generic;
 187    vs->machine = &draw->vs.machine;
 188
 189    return &vs->base;
 190 }