src/mesa/tnl/t_vb_program.c

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  6.5
   4  *
   5  * Copyright (C) 1999-2006  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26 /**
  27  * \file tnl/t_vb_program.c
  28  * \brief Pipeline stage for executing NVIDIA vertex programs.
  29  * \author Brian Paul,  Keith Whitwell
  30  */
  31
  32
  33 #include "glheader.h"
  34 #include "api_noop.h"
  35 #include "colormac.h"
  36 #include "context.h"
  37 #include "dlist.h"
  38 #include "hash.h"
  39 #include "light.h"
  40 #include "macros.h"
  41 #include "imports.h"
  42 #include "simple_list.h"
  43 #include "mtypes.h"
  44 #include "program_instruction.h"
  45 #include "nvvertexec.h"
  46 #include "nvprogram.h"
  47
  48 #include "math/m_translate.h"
  49
  50 #include "t_context.h"
  51 #include "t_pipeline.h"
  52
  53
  54
  55 /*!
  56  * Private storage for the vertex program pipeline stage.
  57  */
  58 struct vp_stage_data {
  59    /** The results of running the vertex program go into these arrays. */
  60    GLvector4f attribs[15];
  61
  62    GLvector4f ndcCoords;              /**< normalized device coords */
  63    GLubyte *clipmask;                 /**< clip flags */
  64    GLubyte ormask, andmask;           /**< for clipping */
  65 };
  66
  67
  68 #define VP_STAGE_DATA(stage) ((struct vp_stage_data *)(stage->privatePtr))
  69
  70
  71 /**
  72  * This function executes vertex programs
  73  */
  74 static GLboolean
  75 run_vp( GLcontext *ctx, struct tnl_pipeline_stage *stage )
  76 {
  77    TNLcontext *tnl = TNL_CONTEXT(ctx);
  78    struct vp_stage_data *store = VP_STAGE_DATA(stage);
  79    struct vertex_buffer *VB = &tnl->vb;
  80    struct vertex_program *program = ctx->VertexProgram.Current;
  81    GLuint i;
  82
  83    if (ctx->ShaderObjects.CurrentProgram != NULL)
  84       return GL_TRUE;
  85
  86    if (!ctx->VertexProgram._Enabled ||
  87        !program->IsNVProgram)
  88       return GL_TRUE;
  89
  90    /* load program parameter registers (they're read-only) */
  91    _mesa_init_vp_per_primitive_registers(ctx);
  92
  93    for (i = 0; i < VB->Count; i++) {
  94       GLuint attr;
  95
  96       _mesa_init_vp_per_vertex_registers(ctx);
  97
  98 #if 0
  99       printf("Input  %d: %f, %f, %f, %f\n", i,
 100              VB->AttribPtr[0]->data[i][0],
 101              VB->AttribPtr[0]->data[i][1],
 102              VB->AttribPtr[0]->data[i][2],
 103              VB->AttribPtr[0]->data[i][3]);
 104       printf("   color: %f, %f, %f, %f\n",
 105              VB->AttribPtr[3]->data[i][0],
 106              VB->AttribPtr[3]->data[i][1],
 107              VB->AttribPtr[3]->data[i][2],
 108              VB->AttribPtr[3]->data[i][3]);
 109       printf("  normal: %f, %f, %f, %f\n",
 110              VB->AttribPtr[2]->data[i][0],
 111              VB->AttribPtr[2]->data[i][1],
 112              VB->AttribPtr[2]->data[i][2],
 113              VB->AttribPtr[2]->data[i][3]);
 114 #endif
 115
 116       /* the vertex array case */
 117       for (attr = 0; attr < VERT_ATTRIB_MAX; attr++) {
 118          if (program->Base.InputsRead & (1 << attr)) {
 119             const GLubyte *ptr = (const GLubyte*) VB->AttribPtr[attr]->data;
 120             const GLuint size = VB->AttribPtr[attr]->size;
 121             const GLuint stride = VB->AttribPtr[attr]->stride;
 122             const GLfloat *data = (GLfloat *) (ptr + stride * i);
 123             COPY_CLEAN_4V(ctx->VertexProgram.Inputs[attr], size, data);
 124          }
 125       }
 126
 127       /* execute the program */
 128       ASSERT(program);
 129       _mesa_exec_vertex_program(ctx, program);
 130
 131       /* Fixup fog an point size results if needed */
 132       if (ctx->Fog.Enabled &&
 133           (program->Base.OutputsWritten & (1 << VERT_RESULT_FOGC)) == 0) {
 134          ctx->VertexProgram.Outputs[VERT_RESULT_FOGC][0] = 1.0;
 135       }
 136
 137       if (ctx->VertexProgram.PointSizeEnabled &&
 138           (program->Base.OutputsWritten & (1 << VERT_RESULT_PSIZ)) == 0) {
 139          ctx->VertexProgram.Outputs[VERT_RESULT_PSIZ][0] = ctx->Point.Size;
 140       }
 141
 142       /* copy the output registers into the VB->attribs arrays */
 143       /* XXX (optimize) could use a conditional and smaller loop limit here */
 144       for (attr = 0; attr < 15; attr++) {
 145          COPY_4V(store->attribs[attr].data[i],
 146                  ctx->VertexProgram.Outputs[attr]);
 147       }
 148    }
 149
 150    /* Setup the VB pointers so that the next pipeline stages get
 151     * their data from the right place (the program output arrays).
 152     */
 153    VB->ClipPtr = &store->attribs[VERT_RESULT_HPOS];
 154    VB->ClipPtr->size = 4;
 155    VB->ClipPtr->count = VB->Count;
 156    VB->ColorPtr[0] = &store->attribs[VERT_RESULT_COL0];
 157    VB->ColorPtr[1] = &store->attribs[VERT_RESULT_BFC0];
 158    VB->SecondaryColorPtr[0] = &store->attribs[VERT_RESULT_COL1];
 159    VB->SecondaryColorPtr[1] = &store->attribs[VERT_RESULT_BFC1];
 160    VB->FogCoordPtr = &store->attribs[VERT_RESULT_FOGC];
 161    VB->PointSizePtr = &store->attribs[VERT_RESULT_PSIZ];
 162
 163    VB->AttribPtr[VERT_ATTRIB_COLOR0] = VB->ColorPtr[0];
 164    VB->AttribPtr[VERT_ATTRIB_COLOR1] = VB->SecondaryColorPtr[0];
 165    VB->AttribPtr[VERT_ATTRIB_FOG] = VB->FogCoordPtr;
 166    VB->AttribPtr[_TNL_ATTRIB_POINTSIZE] = &store->attribs[VERT_RESULT_PSIZ];
 167
 168    for (i = 0; i < ctx->Const.MaxTextureUnits; i++) {
 169       VB->AttribPtr[VERT_ATTRIB_TEX0+i] = VB->TexCoordPtr[i] =
 170          &store->attribs[VERT_RESULT_TEX0 + i];
 171    }
 172
 173
 174
 175    /* Cliptest and perspective divide.  Clip functions must clear
 176     * the clipmask.
 177     */
 178    store->ormask = 0;
 179    store->andmask = CLIP_ALL_BITS;
 180
 181    if (tnl->NeedNdcCoords) {
 182       VB->NdcPtr =
 183          _mesa_clip_tab[VB->ClipPtr->size]( VB->ClipPtr,
 184                                             &store->ndcCoords,
 185                                             store->clipmask,
 186                                             &store->ormask,
 187                                             &store->andmask );
 188    }
 189    else {
 190       VB->NdcPtr = NULL;
 191       _mesa_clip_np_tab[VB->ClipPtr->size]( VB->ClipPtr,
 192                                             NULL,
 193                                             store->clipmask,
 194                                             &store->ormask,
 195                                             &store->andmask );
 196    }
 197
 198    if (store->andmask)  /* All vertices are outside the frustum */
 199       return GL_FALSE;
 200
 201
 202    /* This is where we'd do clip testing against the user-defined
 203     * clipping planes, but they're not supported by vertex programs.
 204     */
 205
 206    VB->ClipOrMask = store->ormask;
 207    VB->ClipMask = store->clipmask;
 208
 209    return GL_TRUE;
 210 }
 211
 212
 213
 214
 215 /**
 216  * Called the first time stage->run is called.  In effect, don't
 217  * allocate data until the first time the stage is run.
 218  */
 219 static GLboolean init_vp( GLcontext *ctx,
 220                           struct tnl_pipeline_stage *stage )
 221 {
 222    TNLcontext *tnl = TNL_CONTEXT(ctx);
 223    struct vertex_buffer *VB = &(tnl->vb);
 224    struct vp_stage_data *store;
 225    const GLuint size = VB->Size;
 226    GLuint i;
 227
 228    stage->privatePtr = MALLOC(sizeof(*store));
 229    store = VP_STAGE_DATA(stage);
 230    if (!store)
 231       return GL_FALSE;
 232
 233    /* Allocate arrays of vertex output values */
 234    for (i = 0; i < 15; i++) {
 235       _mesa_vector4f_alloc( &store->attribs[i], 0, size, 32 );
 236       store->attribs[i].size = 4;
 237    }
 238
 239    /* a few other misc allocations */
 240    _mesa_vector4f_alloc( &store->ndcCoords, 0, size, 32 );
 241    store->clipmask = (GLubyte *) ALIGN_MALLOC(sizeof(GLubyte)*size, 32 );
 242
 243    return GL_TRUE;
 244 }
 245
 246
 247
 248
 249
 250 /**
 251  * Destructor for this pipeline stage.
 252  */
 253 static void dtr( struct tnl_pipeline_stage *stage )
 254 {
 255    struct vp_stage_data *store = VP_STAGE_DATA(stage);
 256
 257    if (store) {
 258       GLuint i;
 259
 260       /* free the vertex program result arrays */
 261       for (i = 0; i < VERT_RESULT_MAX; i++)
 262          _mesa_vector4f_free( &store->attribs[i] );
 263
 264       /* free misc arrays */
 265       _mesa_vector4f_free( &store->ndcCoords );
 266       ALIGN_FREE( store->clipmask );
 267
 268       FREE( store );
 269       stage->privatePtr = NULL;
 270    }
 271 }
 272
 273 /**
 274  * Public description of this pipeline stage.
 275  */
 276 const struct tnl_pipeline_stage _tnl_vertex_program_stage =
 277 {
 278    "vertex-program",
 279    NULL,                        /* private_data */
 280    init_vp,                     /* create */
 281    dtr,                         /* destroy */
 282    NULL,                        /* validate */
 283    run_vp                       /* run -- initially set to ctr */
 284 };