api_arrayelt.c

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

/* GL_FLOAT attributes */

static void GLAPIENTRY VertexAttrib1fvARB(GLuint index, const GLfloat *v)
{
   CALL_VertexAttrib1fvARB(GET_DISPATCH(), (index, v));
}

static void GLAPIENTRY VertexAttrib2fvARB(GLuint index, const GLfloat *v)
{
   CALL_VertexAttrib2fvARB(GET_DISPATCH(), (index, v));
}

static void GLAPIENTRY VertexAttrib3fvARB(GLuint index, const GLfloat *v)
{
   CALL_VertexAttrib3fvARB(GET_DISPATCH(), (index, v));
}

static void GLAPIENTRY VertexAttrib4fvARB(GLuint index, const GLfloat *v)
{
   CALL_VertexAttrib4fvARB(GET_DISPATCH(), (index, v));
}

/* GL_DOUBLE attributes */

static void GLAPIENTRY VertexAttrib1dvARB(GLuint index, const GLdouble *v)
{
   CALL_VertexAttrib1dvARB(GET_DISPATCH(), (index, v));
}

static void GLAPIENTRY VertexAttrib2dvARB(GLuint index, const GLdouble *v)
{
   CALL_VertexAttrib2dvARB(GET_DISPATCH(), (index, v));
}

static void GLAPIENTRY VertexAttrib3dvARB(GLuint index, const GLdouble *v)
{
   CALL_VertexAttrib3dvARB(GET_DISPATCH(), (index, v));
}

static void GLAPIENTRY VertexAttrib4dvARB(GLuint index, const GLdouble *v)
{
   CALL_VertexAttrib4dvARB(GET_DISPATCH(), (index, v));
}


/*
 * Array [size][type] of VertexAttrib functions
 */
static attrib_func AttribFuncsARB[2][4][8] = {
   {
      /* non-normalized */
      {
         /* size 1 */
         (attrib_func) VertexAttrib1bvARB,
         (attrib_func) VertexAttrib1ubvARB,
         (attrib_func) VertexAttrib1svARB,
         (attrib_func) VertexAttrib1usvARB,
         (attrib_func) VertexAttrib1ivARB,
         (attrib_func) VertexAttrib1uivARB,
         (attrib_func) VertexAttrib1fvARB,
         (attrib_func) VertexAttrib1dvARB
      },
      {
         /* size 2 */
         (attrib_func) VertexAttrib2bvARB,
         (attrib_func) VertexAttrib2ubvARB,
         (attrib_func) VertexAttrib2svARB,
         (attrib_func) VertexAttrib2usvARB,
         (attrib_func) VertexAttrib2ivARB,
         (attrib_func) VertexAttrib2uivARB,
         (attrib_func) VertexAttrib2fvARB,
         (attrib_func) VertexAttrib2dvARB
      },
      {
         /* size 3 */
         (attrib_func) VertexAttrib3bvARB,
         (attrib_func) VertexAttrib3ubvARB,
         (attrib_func) VertexAttrib3svARB,
         (attrib_func) VertexAttrib3usvARB,
         (attrib_func) VertexAttrib3ivARB,
         (attrib_func) VertexAttrib3uivARB,
         (attrib_func) VertexAttrib3fvARB,
         (attrib_func) VertexAttrib3dvARB
      },
      {
         /* size 4 */
         (attrib_func) VertexAttrib4bvARB,
         (attrib_func) VertexAttrib4ubvARB,
         (attrib_func) VertexAttrib4svARB,
         (attrib_func) VertexAttrib4usvARB,
         (attrib_func) VertexAttrib4ivARB,
         (attrib_func) VertexAttrib4uivARB,
         (attrib_func) VertexAttrib4fvARB,
         (attrib_func) VertexAttrib4dvARB
      }
   },
   {
      /* normalized (except for float/double) */
      {
         /* size 1 */
         (attrib_func) VertexAttrib1NbvARB,
         (attrib_func) VertexAttrib1NubvARB,
         (attrib_func) VertexAttrib1NsvARB,
         (attrib_func) VertexAttrib1NusvARB,
         (attrib_func) VertexAttrib1NivARB,
         (attrib_func) VertexAttrib1NuivARB,
         (attrib_func) VertexAttrib1fvARB,
         (attrib_func) VertexAttrib1dvARB
      },
      {
         /* size 2 */
         (attrib_func) VertexAttrib2NbvARB,
         (attrib_func) VertexAttrib2NubvARB,
         (attrib_func) VertexAttrib2NsvARB,
         (attrib_func) VertexAttrib2NusvARB,
         (attrib_func) VertexAttrib2NivARB,
         (attrib_func) VertexAttrib2NuivARB,
         (attrib_func) VertexAttrib2fvARB,
         (attrib_func) VertexAttrib2dvARB
      },
      {
         /* size 3 */
         (attrib_func) VertexAttrib3NbvARB,
         (attrib_func) VertexAttrib3NubvARB,
         (attrib_func) VertexAttrib3NsvARB,
         (attrib_func) VertexAttrib3NusvARB,
         (attrib_func) VertexAttrib3NivARB,
         (attrib_func) VertexAttrib3NuivARB,
         (attrib_func) VertexAttrib3fvARB,
         (attrib_func) VertexAttrib3dvARB
      },
      {
         /* size 4 */
         (attrib_func) VertexAttrib4NbvARB,
         (attrib_func) VertexAttrib4NubvARB,
         (attrib_func) VertexAttrib4NsvARB,
         (attrib_func) VertexAttrib4NusvARB,
         (attrib_func) VertexAttrib4NivARB,
         (attrib_func) VertexAttrib4NuivARB,
         (attrib_func) VertexAttrib4fvARB,
         (attrib_func) VertexAttrib4dvARB
      }
   }
};

/**********************************************************************/


GLboolean _ae_create_context( GLcontext *ctx )
{
   if (ctx->aelt_context)
      return GL_TRUE;

   /* These _gloffset_* values may not be compile-time constants */
   SecondaryColorFuncs[0] = _gloffset_SecondaryColor3bvEXT;
   SecondaryColorFuncs[1] = _gloffset_SecondaryColor3ubvEXT;
   SecondaryColorFuncs[2] = _gloffset_SecondaryColor3svEXT;
   SecondaryColorFuncs[3] = _gloffset_SecondaryColor3usvEXT;
   SecondaryColorFuncs[4] = _gloffset_SecondaryColor3ivEXT;
   SecondaryColorFuncs[5] = _gloffset_SecondaryColor3uivEXT;
   SecondaryColorFuncs[6] = _gloffset_SecondaryColor3fvEXT;
   SecondaryColorFuncs[7] = _gloffset_SecondaryColor3dvEXT;

   FogCoordFuncs[0] = -1;
   FogCoordFuncs[1] = -1;
   FogCoordFuncs[2] = -1;
   FogCoordFuncs[3] = -1;
   FogCoordFuncs[4] = -1;
   FogCoordFuncs[5] = -1;
   FogCoordFuncs[6] = _gloffset_FogCoordfvEXT;
   FogCoordFuncs[7] = _gloffset_FogCoorddvEXT;

   ctx->aelt_context = CALLOC( sizeof(AEcontext) );
   if (!ctx->aelt_context)
      return GL_FALSE;

   AE_CONTEXT(ctx)->NewState = ~0;
   return GL_TRUE;
}


void _ae_destroy_context( GLcontext *ctx )
{
   if ( AE_CONTEXT( ctx ) ) {
      FREE( ctx->aelt_context );
      ctx->aelt_context = NULL;
   }
}

static void check_vbo( AEcontext *actx,
		       struct gl_buffer_object *vbo )
{
   if (vbo->Name && !vbo->Pointer) {
      GLuint i;
      for (i = 0; i < actx->nr_vbos; i++)
	 if (actx->vbo[i] == vbo)
	    return;
      assert(actx->nr_vbos < VERT_ATTRIB_MAX);
      actx->vbo[actx->nr_vbos++] = vbo;
   }
}


/**
 * Make a list of per-vertex functions to call for each glArrayElement call.
 * These functions access the array data (i.e. glVertex, glColor, glNormal,
 * etc).
 * Note: this may be called during display list construction.
 */
static void _ae_update_state( GLcontext *ctx )
{
   AEcontext *actx = AE_CONTEXT(ctx);
   AEarray *aa = actx->arrays;
   AEattrib *at = actx->attribs;
   GLuint i;

   actx->nr_vbos = 0;

   /* conventional vertex arrays */
  if (ctx->Array.ArrayObj->Index.Enabled) {
      aa->array = &ctx->Array.ArrayObj->Index;
      aa->offset = IndexFuncs[TYPE_IDX(aa->array->Type)];
      check_vbo(actx, aa->array->BufferObj);
      aa++;
   }
   if (ctx->Array.ArrayObj->EdgeFlag.Enabled) {
      aa->array = &ctx->Array.ArrayObj->EdgeFlag;
      aa->offset = _gloffset_EdgeFlagv;
      check_vbo(actx, aa->array->BufferObj);
      aa++;
   }
   if (ctx->Array.ArrayObj->Normal.Enabled) {
      aa->array = &ctx->Array.ArrayObj->Normal;
      aa->offset = NormalFuncs[TYPE_IDX(aa->array->Type)];
      check_vbo(actx, aa->array->BufferObj);
      aa++;
   }
   if (ctx->Array.ArrayObj->Color.Enabled) {
      aa->array = &ctx->Array.ArrayObj->Color;
      aa->offset = ColorFuncs[aa->array->Size-3][TYPE_IDX(aa->array->Type)];
      check_vbo(actx, aa->array->BufferObj);
      aa++;
   }
   if (ctx->Array.ArrayObj->SecondaryColor.Enabled) {
      aa->array = &ctx->Array.ArrayObj->SecondaryColor;
      aa->offset = SecondaryColorFuncs[TYPE_IDX(aa->array->Type)];
      check_vbo(actx, aa->array->BufferObj);
      aa++;
   }
   if (ctx->Array.ArrayObj->FogCoord.Enabled) {
      aa->array = &ctx->Array.ArrayObj->FogCoord;
      aa->offset = FogCoordFuncs[TYPE_IDX(aa->array->Type)];
      check_vbo(actx, aa->array->BufferObj);
      aa++;
   }
   for (i = 0; i < ctx->Const.MaxTextureCoordUnits; i++) {
      struct gl_client_array *attribArray = &ctx->Array.ArrayObj->TexCoord[i];
      if (attribArray->Enabled) {
         /* NOTE: we use generic glVertexAttribNV functions here.
          * If we ever remove GL_NV_vertex_program this will have to change.
          */
         at->array = attribArray;
         ASSERT(!at->array->Normalized);
         at->func = AttribFuncsNV[at->array->Normalized]
                                 [at->array->Size-1]
                                 [TYPE_IDX(at->array->Type)];
         at->index = VERT_ATTRIB_TEX0 + i;
	 check_vbo(actx, at->array->BufferObj);
         at++;
      }
   }

   /* generic vertex attribute arrays */   
   for (i = 1; i < VERT_ATTRIB_MAX; i++) {  /* skip zero! */
      struct gl_client_array *attribArray = &ctx->Array.ArrayObj->VertexAttrib[i];
      if (attribArray->Enabled) {
         at->array = attribArray;
         /* Note: we can't grab the _glapi_Dispatch->VertexAttrib1fvNV
          * function pointer here (for float arrays) since the pointer may
          * change from one execution of _ae_loopback_array_elt() to
          * the next.  Doing so caused UT to break.
          */
         if (ctx->VertexProgram._Enabled
             && ctx->VertexProgram.Current->IsNVProgram) {
            at->func = AttribFuncsNV[at->array->Normalized]
                                    [at->array->Size-1]
                                    [TYPE_IDX(at->array->Type)];
         }
         else {
            at->func = AttribFuncsARB[at->array->Normalized]
                                     [at->array->Size-1]
                                     [TYPE_IDX(at->array->Type)];
         }
         at->index = i;
	 check_vbo(actx, at->array->BufferObj);
         at++;
      }
   }

   /* finally, vertex position */
   if (ctx->Array.ArrayObj->VertexAttrib[0].Enabled) {
      /* Use glVertex(v) instead of glVertexAttrib(0, v) to be sure it's
       * issued as the last (provoking) attribute).
       */
      aa->array = &ctx->Array.ArrayObj->VertexAttrib[0];
      assert(aa->array->Size >= 2); /* XXX fix someday? */
      aa->offset = VertexFuncs[aa->array->Size-2][TYPE_IDX(aa->array->Type)];
      check_vbo(actx, aa->array->BufferObj);
      aa++;
   }
   else if (ctx->Array.ArrayObj->Vertex.Enabled) {
      aa->array = &ctx->Array.ArrayObj->Vertex;
      aa->offset = VertexFuncs[aa->array->Size-2][TYPE_IDX(aa->array->Type)];
      check_vbo(actx, aa->array->BufferObj);
      aa++;
   }

   check_vbo(actx, ctx->Array.ElementArrayBufferObj);

   ASSERT(at - actx->attribs <= VERT_ATTRIB_MAX);
   ASSERT(aa - actx->arrays < 32);
   at->func = NULL;  /* terminate the list */
   aa->offset = -1;  /* terminate the list */

   actx->NewState = 0;
}

void _ae_map_vbos( GLcontext *ctx )
{
   AEcontext *actx = AE_CONTEXT(ctx);
   GLuint i;
   
   if (actx->mapped_vbos)
      return;

   if (actx->NewState)
      _ae_update_state(ctx);

   for (i = 0; i < actx->nr_vbos; i++)
      ctx->Driver.MapBuffer(ctx,
			    GL_ARRAY_BUFFER_ARB,
			    GL_DYNAMIC_DRAW_ARB,
			    actx->vbo[i]);

   if (actx->nr_vbos)
      actx->mapped_vbos = GL_TRUE;
}

void _ae_unmap_vbos( GLcontext *ctx )
{
   AEcontext *actx = AE_CONTEXT(ctx);
   GLuint i;

   if (!actx->mapped_vbos)
      return;

   assert (!actx->NewState);

   for (i = 0; i < actx->nr_vbos; i++)
      ctx->Driver.UnmapBuffer(ctx,
			      GL_ARRAY_BUFFER_ARB,
			      actx->vbo[i]);

   actx->mapped_vbos = GL_FALSE;
}


/**
 * Called via glArrayElement() and glDrawArrays().
 * Issue the glNormal, glVertex, glColor, glVertexAttrib, etc functions
 * for all enabled vertex arrays (for elt-th element).
 * Note: this may be called during display list construction.
 */
void GLAPIENTRY _ae_loopback_array_elt( GLint elt )
{
   GET_CURRENT_CONTEXT(ctx);
   const AEcontext *actx = AE_CONTEXT(ctx);
   const AEarray *aa;
   const AEattrib *at;
   const struct _glapi_table * const disp = GET_DISPATCH();
   GLboolean do_map;

   if (actx->NewState) {
      assert(!actx->mapped_vbos);
      _ae_update_state( ctx );
   }

   do_map = actx->nr_vbos && !actx->mapped_vbos;

   /* 
    */
   if (do_map)
      _ae_map_vbos(ctx);
   
   /* generic attributes */
   for (at = actx->attribs; at->func; at++) {
      const GLubyte *src
         = ADD_POINTERS(at->array->BufferObj->Pointer, at->array->Ptr)
         + elt * at->array->StrideB;
      at->func( at->index, src );
   }

   /* conventional arrays */
   for (aa = actx->arrays; aa->offset != -1 ; aa++) {
      const GLubyte *src
         = ADD_POINTERS(aa->array->BufferObj->Pointer, aa->array->Ptr)
         + elt * aa->array->StrideB;
      CALL_by_offset( disp, (array_func), aa->offset, 
		      ((const void *) src) );
   }

   if (do_map)
      _ae_unmap_vbos(ctx);
}


void _ae_invalidate_state( GLcontext *ctx, GLuint new_state )
{
   AEcontext *actx = AE_CONTEXT(ctx);

   
   /* Only interested in this subset of mesa state.  Need to prune
    * this down as both tnl/ and the drivers can raise statechanges
    * for arcane reasons in the middle of seemingly atomic operations
    * like DrawElements, over which we'd like to keep a known set of
    * arrays and vbo's mapped.  
    *
    * Luckily, neither the drivers nor tnl muck with the state that
    * concerns us here:
    */
   new_state &= _NEW_ARRAY | _NEW_PROGRAM;
   if (new_state) {
      assert(!actx->mapped_vbos);
      actx->NewState |= new_state;
   }
}