program.c

mesa-6.5-minigui源码

         switch (state[1]) {
            case STATE_ENV:
               COPY_4V(value, ctx->FragmentProgram.Parameters[idx]);
               break;
            case STATE_LOCAL:
               COPY_4V(value, ctx->FragmentProgram.Current->Base.LocalParams[idx]);
               break;
            default:
               _mesa_problem(ctx, "Bad state switch in _mesa_fetch_state()");
               return;
         }
      }
      return;
		
   case STATE_VERTEX_PROGRAM:
      {
         /* state[1] = {STATE_ENV, STATE_LOCAL} */
         /* state[2] = parameter index          */
         const int idx = (int) state[2];
         switch (state[1]) {
            case STATE_ENV:
               COPY_4V(value, ctx->VertexProgram.Parameters[idx]);
               break;
            case STATE_LOCAL:
               COPY_4V(value, ctx->VertexProgram.Current->Base.LocalParams[idx]);
               break;
            default:
               _mesa_problem(ctx, "Bad state switch in _mesa_fetch_state()");
               return;
         }
      }
      return;

   case STATE_INTERNAL:
      {
         switch (state[1]) {
	    case STATE_NORMAL_SCALE:
               ASSIGN_4V(value, ctx->_ModelViewInvScale, 0, 0, 1);
               break;
	    default:
               _mesa_problem(ctx, "Bad state switch in _mesa_fetch_state()");
               return;
         }
      }
      return;

   default:
      _mesa_problem(ctx, "Invalid state in _mesa_fetch_state");
      return;
   }
}


/* Return a bit mask of the Mesa state flags under which a parameter's
 * value might change.
 */
static GLuint make_state_flags(const GLint state[])
{
   switch (state[0]) {
   case STATE_MATERIAL:
   case STATE_LIGHT:
   case STATE_LIGHTMODEL_AMBIENT:
   case STATE_LIGHTMODEL_SCENECOLOR:
   case STATE_LIGHTPROD:
      return _NEW_LIGHT;

   case STATE_TEXGEN:
   case STATE_TEXENV_COLOR:
      return _NEW_TEXTURE;

   case STATE_FOG_COLOR:
   case STATE_FOG_PARAMS:
      return _NEW_FOG;

   case STATE_CLIPPLANE:
      return _NEW_TRANSFORM;

   case STATE_POINT_SIZE:
   case STATE_POINT_ATTENUATION:
      return _NEW_POINT;

   case STATE_MATRIX:
      switch (state[1]) {
      case STATE_MODELVIEW:
	 return _NEW_MODELVIEW;
      case STATE_PROJECTION:
	 return _NEW_PROJECTION;
      case STATE_MVP:
	 return _NEW_MODELVIEW | _NEW_PROJECTION;
      case STATE_TEXTURE:
	 return _NEW_TEXTURE_MATRIX;
      case STATE_PROGRAM:
	 return _NEW_TRACK_MATRIX;
      default:
	 assert(0);
	 return 0;
      }

   case STATE_DEPTH_RANGE:
      return _NEW_VIEWPORT;

   case STATE_FRAGMENT_PROGRAM:
   case STATE_VERTEX_PROGRAM:
      return _NEW_PROGRAM;

   case STATE_INTERNAL:
      switch (state[1]) {
      case STATE_NORMAL_SCALE:
	 return _NEW_MODELVIEW;
      default:
	 assert(0);
	 return 0;
      }

   default:
      assert(0);
      return 0;
   }
}





static void
append(char *dst, const char *src)
{
   while (*dst)
      dst++;
   while (*src)
     *dst++ = *src++;
   *dst = 0;
}

static void
append_token(char *dst, enum state_index k)
{
   switch (k) {
   case STATE_MATERIAL:
      append(dst, "material.");
      break;
   case STATE_LIGHT:
      append(dst, "light");
      break;
   case STATE_LIGHTMODEL_AMBIENT:
      append(dst, "lightmodel.ambient");
      break;
   case STATE_LIGHTMODEL_SCENECOLOR:
      break;
   case STATE_LIGHTPROD:
      append(dst, "lightprod");
      break;
   case STATE_TEXGEN:
      append(dst, "texgen");
      break;
   case STATE_FOG_COLOR:
      append(dst, "fog.color");
      break;
   case STATE_FOG_PARAMS:
      append(dst, "fog.params");
      break;
   case STATE_CLIPPLANE:
      append(dst, "clip");
      break;
   case STATE_POINT_SIZE:
      append(dst, "point.size");
      break;
   case STATE_POINT_ATTENUATION:
      append(dst, "point.attenuation");
      break;
   case STATE_MATRIX:
      append(dst, "matrix.");
      break;
   case STATE_MODELVIEW:
      append(dst, "modelview");
      break;
   case STATE_PROJECTION:
      append(dst, "projection");
      break;
   case STATE_MVP:
      append(dst, "mvp");
      break;
   case STATE_TEXTURE:
      append(dst, "texture");
      break;
   case STATE_PROGRAM:
      append(dst, "program");
      break;
   case STATE_MATRIX_INVERSE:
      append(dst, ".inverse");
      break;
   case STATE_MATRIX_TRANSPOSE:
      append(dst, ".transpose");
      break;
   case STATE_MATRIX_INVTRANS:
      append(dst, ".invtrans");
      break;
   case STATE_AMBIENT:
      append(dst, "ambient");
      break;
   case STATE_DIFFUSE:
      append(dst, "diffuse");
      break;
   case STATE_SPECULAR:
      append(dst, "specular");
      break;
   case STATE_EMISSION:
      append(dst, "emission");
      break;
   case STATE_SHININESS:
      append(dst, "shininess");
      break;
   case STATE_HALF:
      append(dst, "half");
      break;
   case STATE_POSITION:
      append(dst, ".position");
      break;
   case STATE_ATTENUATION:
      append(dst, ".attenuation");
      break;
   case STATE_SPOT_DIRECTION:
      append(dst, ".spot.direction");
      break;
   case STATE_TEXGEN_EYE_S:
      append(dst, "eye.s");
      break;
   case STATE_TEXGEN_EYE_T:
      append(dst, "eye.t");
      break;
   case STATE_TEXGEN_EYE_R:
      append(dst, "eye.r");
      break;
   case STATE_TEXGEN_EYE_Q:
      append(dst, "eye.q");
      break;
   case STATE_TEXGEN_OBJECT_S:
      append(dst, "object.s");
      break;
   case STATE_TEXGEN_OBJECT_T:
      append(dst, "object.t");
      break;
   case STATE_TEXGEN_OBJECT_R:
      append(dst, "object.r");
      break;
   case STATE_TEXGEN_OBJECT_Q:
      append(dst, "object.q");
      break;
   case STATE_TEXENV_COLOR:
      append(dst, "texenv");
      break;
   case STATE_DEPTH_RANGE:
      append(dst, "depth.range");
      break;
   case STATE_VERTEX_PROGRAM:
   case STATE_FRAGMENT_PROGRAM:
      break;
   case STATE_ENV:
      append(dst, "env");
      break;
   case STATE_LOCAL:
      append(dst, "local");
      break;
   case STATE_INTERNAL:
   case STATE_NORMAL_SCALE:
   case STATE_POSITION_NORMALIZED:
      append(dst, "(internal)");
      break;
   default:
      ;
   }
}

static void
append_face(char *dst, GLint face)
{
   if (face == 0)
      append(dst, "front.");
   else
      append(dst, "back.");
}

static void
append_index(char *dst, GLint index)
{
   char s[20];
   _mesa_sprintf(s, "[%d].", index);
   append(dst, s);
}

/**
 * Make a string from the given state vector.
 * For example, return "state.matrix.texture[2].inverse".
 */
static const char *
make_state_string(const GLint state[6])
{
   char str[1000] = "";
   char tmp[30];

   append(str, "state.");
   append_token(str, (enum state_index) state[0]);

   switch (state[0]) {
   case STATE_MATERIAL:
      append_face(str, state[1]);
      append_token(str, (enum state_index) state[2]);
      break;
   case STATE_LIGHT:
      append(str, "light");
      append_index(str, state[1]); /* light number [i]. */
      append_token(str, (enum state_index) state[2]); /* coefficients */
      break;
   case STATE_LIGHTMODEL_AMBIENT:
      append(str, "lightmodel.ambient");
      break;
   case STATE_LIGHTMODEL_SCENECOLOR:
      if (state[1] == 0) {
         append(str, "lightmodel.front.scenecolor");
      }
      else {
         append(str, "lightmodel.back.scenecolor");
      }
      break;
   case STATE_LIGHTPROD:
      append_index(str, state[1]); /* light number [i]. */
      append_face(str, state[2]);
      append_token(str, (enum state_index) state[3]);
      break;
   case STATE_TEXGEN:
      append_index(str, state[1]); /* tex unit [i] */
      append_token(str, (enum state_index) state[2]); /* plane coef */
      break;
   case STATE_TEXENV_COLOR:
      append_index(str, state[1]); /* tex unit [i] */
      append(str, "color");
      break;
   case STATE_FOG_COLOR:
   case STATE_FOG_PARAMS:
      break;
   case STATE_CLIPPLANE:
      append_index(str, state[1]); /* plane [i] */
      append(str, "plane");
      break;
   case STATE_POINT_SIZE:
   case STATE_POINT_ATTENUATION:
      break;
   case STATE_MATRIX:
      {
         /* state[1] = modelview, projection, texture, etc. */
         /* state[2] = which texture matrix or program matrix */
         /* state[3] = first column to fetch */
         /* state[4] = last column to fetch */
         /* state[5] = transpose, inverse or invtrans */
         const enum state_index mat = (enum state_index) state[1];
         const GLuint index = (GLuint) state[2];
         const GLuint first = (GLuint) state[3];
         const GLuint last = (GLuint) state[4];
         const enum state_index modifier = (enum state_index) state[5];
         append_token(str, mat);
         if (index)
            append_index(str, index);
         if (modifier)
            append_token(str, modifier);
         if (first == last)
            _mesa_sprintf(tmp, ".row[%d]", first);
         else
            _mesa_sprintf(tmp, ".row[%d..%d]", first, last);
         append(str, tmp);
      }
      break;
   case STATE_DEPTH_RANGE:
      break;
   case STATE_FRAGMENT_PROGRAM:
   case STATE_VERTEX_PROGRAM:
      /* state[1] = {STATE_ENV, STATE_LOCAL} */
      /* state[2] = parameter index          */
      append_token(str, (enum state_index) state[1]);
      append_index(str, state[2]);
      break;
   case STATE_INTERNAL:
      break;
   default:
      _mesa_problem(NULL, "Invalid state in maka_state_string");
      break;
   }

   return _mesa_strdup(str);
}


/**
 * Loop over all the parameters in a parameter list.  If the parameter
 * is a GL state reference, look up the current value of that state
 * variable and put it into the parameter's Value[4] array.
 * This would be called at glBegin time when using a fragment program.
 */
void
_mesa_load_state_parameters(GLcontext *ctx,
                            struct program_parameter_list *paramList)
{
   GLuint i;

   if (!paramList)
      return;

   for (i = 0; i < paramList->NumParameters; i++) {
      if (paramList->Parameters[i].Type == PROGRAM_STATE_VAR) {
         _mesa_fetch_state(ctx, 
			   paramList->Parameters[i].StateIndexes,
                           paramList->ParameterValues[i]);
      }
   }
}


/**
 * Initialize program instruction fields to defaults.
 */
void
_mesa_init_instruction(struct prog_instruction *inst)
{
   _mesa_bzero(inst, sizeof(struct prog_instruction));

   inst->SrcReg[0].File = PROGRAM_UNDEFINED;
   inst->SrcReg[0].Swizzle = SWIZZLE_NOOP;
   inst->SrcReg[1].File = PROGRAM_UNDEFINED;