api_noop.c

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

   }
   else
      _mesa_error( ctx, GL_INVALID_VALUE, "glVertexAttrib1fvARB(index)" );
}

static void GLAPIENTRY _mesa_noop_VertexAttrib2fARB( GLuint index, GLfloat x, GLfloat y )
{
   GET_CURRENT_CONTEXT(ctx);
   if (index < MAX_VERTEX_ATTRIBS) {
      ASSIGN_4V(ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + index], x, y, 0, 1);
   }
   else
      _mesa_error( ctx, GL_INVALID_VALUE, "glVertexAttrib2fARB(index)" );
}

static void GLAPIENTRY _mesa_noop_VertexAttrib2fvARB( GLuint index, const GLfloat *v )
{
   GET_CURRENT_CONTEXT(ctx);
   if (index < MAX_VERTEX_ATTRIBS) {
      ASSIGN_4V(ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + index], v[0], v[1], 0, 1);
   }
   else
      _mesa_error( ctx, GL_INVALID_VALUE, "glVertexAttrib2fvARB(index)" );
}

static void GLAPIENTRY _mesa_noop_VertexAttrib3fARB( GLuint index, GLfloat x,
                                  GLfloat y, GLfloat z )
{
   GET_CURRENT_CONTEXT(ctx);
   if (index < MAX_VERTEX_ATTRIBS) {
      ASSIGN_4V(ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + index], x, y, z, 1);
   }
   else
      _mesa_error( ctx, GL_INVALID_VALUE, "glVertexAttrib3fARB(index)" );
}

static void GLAPIENTRY _mesa_noop_VertexAttrib3fvARB( GLuint index, const GLfloat *v )
{
   GET_CURRENT_CONTEXT(ctx);
   if (index < MAX_VERTEX_ATTRIBS) {
      ASSIGN_4V(ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + index], v[0], v[1], v[2], 1);
   }
   else
      _mesa_error( ctx, GL_INVALID_VALUE, "glVertexAttrib3fvARB(index)" );
}

static void GLAPIENTRY _mesa_noop_VertexAttrib4fARB( GLuint index, GLfloat x,
                                  GLfloat y, GLfloat z, GLfloat w )
{
   GET_CURRENT_CONTEXT(ctx);
   if (index < MAX_VERTEX_ATTRIBS) {
      ASSIGN_4V(ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + index], x, y, z, w);
   }
   else
      _mesa_error( ctx, GL_INVALID_VALUE, "glVertexAttrib4fARB(index)" );
}

static void GLAPIENTRY _mesa_noop_VertexAttrib4fvARB( GLuint index, const GLfloat *v )
{
   GET_CURRENT_CONTEXT(ctx);
   if (index < MAX_VERTEX_ATTRIBS) {
      ASSIGN_4V(ctx->Current.Attrib[VERT_ATTRIB_GENERIC0 + index], v[0], v[1], v[2], v[3]);
   }
   else
      _mesa_error( ctx, GL_INVALID_VALUE, "glVertexAttrib4fvARB(index)" );
}



/**
 * Called by glMaterial*()
 */
void GLAPIENTRY
_mesa_noop_Materialfv( GLenum face, GLenum pname, const GLfloat *params )
{
   GET_CURRENT_CONTEXT(ctx);
   GLint i, nr;
   struct gl_material *mat = &ctx->Light.Material;
   GLuint bitmask = _mesa_material_bitmask( ctx, face, pname, ~0,
                                            "_mesa_noop_Materialfv" );

   if (ctx->Light.ColorMaterialEnabled)
      bitmask &= ~ctx->Light.ColorMaterialBitmask;

   if (bitmask == 0)
      return;

   switch (pname) {
   case GL_SHININESS: nr = 1; break;
   case GL_COLOR_INDEXES: nr = 3; break;
   default: nr = 4 ; break;
   }

   for (i = 0 ; i < MAT_ATTRIB_MAX ; i++) 
      if (bitmask & (1<<i))
	 COPY_SZ_4V( mat->Attrib[i], nr, params ); 

   _mesa_update_material( ctx, bitmask );
}


/**
 * These really are noops outside begin/end:
 */
static void GLAPIENTRY _mesa_noop_Vertex2fv( const GLfloat *v )
{
   (void) v;
}

static void GLAPIENTRY _mesa_noop_Vertex3fv( const GLfloat *v )
{
   (void) v;
}

static void GLAPIENTRY _mesa_noop_Vertex4fv( const GLfloat *v )
{
   (void) v;
}

static void GLAPIENTRY _mesa_noop_Vertex2f( GLfloat a, GLfloat b )
{
   (void) a; (void) b;
}

static void GLAPIENTRY _mesa_noop_Vertex3f( GLfloat a, GLfloat b, GLfloat c )
{
   (void) a; (void) b; (void) c;
}

static void GLAPIENTRY _mesa_noop_Vertex4f( GLfloat a, GLfloat b, GLfloat c, GLfloat d )
{
   (void) a; (void) b; (void) c; (void) d;
}

/* Similarly, these have no effect outside begin/end:
 */
static void GLAPIENTRY _mesa_noop_EvalCoord1f( GLfloat a )
{
   (void) a;
}

static void GLAPIENTRY _mesa_noop_EvalCoord1fv( const GLfloat *v )
{
   (void) v;
}

static void GLAPIENTRY _mesa_noop_EvalCoord2f( GLfloat a, GLfloat b )
{
   (void) a; (void) b;
}

static void GLAPIENTRY _mesa_noop_EvalCoord2fv( const GLfloat *v )
{
   (void) v;
}

static void GLAPIENTRY _mesa_noop_EvalPoint1( GLint a )
{
   (void) a;
}

static void GLAPIENTRY _mesa_noop_EvalPoint2( GLint a, GLint b )
{
   (void) a; (void) b;
}


/* Begin -- call into driver, should result in the vtxfmt being
 * swapped out:
 */
static void GLAPIENTRY _mesa_noop_Begin( GLenum mode )
{
   (void) mode;
}


/* End -- just raise an error
 */
static void GLAPIENTRY _mesa_noop_End( void )
{
   GET_CURRENT_CONTEXT(ctx);
   _mesa_error( ctx, GL_INVALID_OPERATION, "glEnd(no glBegin)" );
}


/**
 * Execute a glRectf() function.  This is not suitable for GL_COMPILE
 * modes (as the test for outside begin/end is not compiled),
 * but may be useful for drivers in circumstances which exclude
 * display list interactions.
 *
 * (None of the functions in this file are suitable for GL_COMPILE
 * modes).
 */
void GLAPIENTRY
_mesa_noop_Rectf( GLfloat x1, GLfloat y1, GLfloat x2, GLfloat y2 )
{
   {
      GET_CURRENT_CONTEXT(ctx);
      ASSERT_OUTSIDE_BEGIN_END(ctx);
   }

   CALL_Begin(GET_DISPATCH(), (GL_QUADS));
   CALL_Vertex2f(GET_DISPATCH(), (x1, y1));
   CALL_Vertex2f(GET_DISPATCH(), (x2, y1));
   CALL_Vertex2f(GET_DISPATCH(), (x2, y2));
   CALL_Vertex2f(GET_DISPATCH(), (x1, y2));
   CALL_End(GET_DISPATCH(), ());
}


/**
 * Some very basic support for arrays.  Drivers without explicit array
 * support can hook these in, but still need to supply an array-elt
 * implementation.
 */
static void GLAPIENTRY
_mesa_noop_DrawArrays(GLenum mode, GLint start, GLsizei count)
{
   GET_CURRENT_CONTEXT(ctx);
   GLint i;

   if (!_mesa_validate_DrawArrays( ctx, mode, start, count ))
      return;

   CALL_Begin(GET_DISPATCH(), (mode));
   for (i = 0; i < count; i++)
       CALL_ArrayElement(GET_DISPATCH(), (start + i));
   CALL_End(GET_DISPATCH(), ());
}


static void GLAPIENTRY
_mesa_noop_DrawElements(GLenum mode, GLsizei count, GLenum type,
                        const GLvoid *indices)
{
   GET_CURRENT_CONTEXT(ctx);
   GLint i;

   if (!_mesa_validate_DrawElements( ctx, mode, count, type, indices ))
      return;

   CALL_Begin(GET_DISPATCH(), (mode));

   switch (type) {
   case GL_UNSIGNED_BYTE:
      for (i = 0 ; i < count ; i++)
	  CALL_ArrayElement(GET_DISPATCH(), ( ((GLubyte *)indices)[i] ));
      break;
   case GL_UNSIGNED_SHORT:
      for (i = 0 ; i < count ; i++)
	  CALL_ArrayElement(GET_DISPATCH(), ( ((GLushort *)indices)[i] ));
      break;
   case GL_UNSIGNED_INT:
      for (i = 0 ; i < count ; i++)
	  CALL_ArrayElement(GET_DISPATCH(), ( ((GLuint *)indices)[i] ));
      break;
   default:
      _mesa_error( ctx, GL_INVALID_ENUM, "glDrawElements(type)" );
      break;
   }

   CALL_End(GET_DISPATCH(), ());
}


static void GLAPIENTRY
_mesa_noop_DrawRangeElements(GLenum mode,
                             GLuint start, GLuint end,
                             GLsizei count, GLenum type,
                             const GLvoid *indices)
{
   GET_CURRENT_CONTEXT(ctx);

   if (_mesa_validate_DrawRangeElements( ctx, mode,
					 start, end,
					 count, type, indices ))
       CALL_DrawElements(GET_DISPATCH(), (mode, count, type, indices));
}

/*
 * Eval Mesh
 */

/**
 * KW:
 * If are compiling, we don't know whether eval will produce a
 * vertex when it is run in the future.  If this is pure immediate
 * mode, eval is a noop if neither vertex map is enabled.
 *
 * Thus we need to have a check in the display list code or elsewhere
 * for eval(1,2) vertices in the case where map(1,2)_vertex is
 * disabled, and to purge those vertices from the vb.
 */
void GLAPIENTRY
_mesa_noop_EvalMesh1( GLenum mode, GLint i1, GLint i2 )
{
   GET_CURRENT_CONTEXT(ctx);
   GLint i;
   GLfloat u, du;
   GLenum prim;

   switch (mode) {
   case GL_POINT:
      prim = GL_POINTS;
      break;
   case GL_LINE:
      prim = GL_LINE_STRIP;
      break;
   default:
      _mesa_error( ctx, GL_INVALID_ENUM, "glEvalMesh1(mode)" );
      return;
   }

   /* No effect if vertex maps disabled.
    */
   if (!ctx->Eval.Map1Vertex4 && 
       !ctx->Eval.Map1Vertex3 &&
       !(ctx->VertexProgram._Enabled && ctx->Eval.Map1Attrib[VERT_ATTRIB_POS]))
      return;

   du = ctx->Eval.MapGrid1du;
   u = ctx->Eval.MapGrid1u1 + i1 * du;

   CALL_Begin(GET_DISPATCH(), (prim));
   for (i=i1;i<=i2;i++,u+=du) {
      CALL_EvalCoord1f(GET_DISPATCH(), (u));
   }
   CALL_End(GET_DISPATCH(), ());
}



void GLAPIENTRY
_mesa_noop_EvalMesh2( GLenum mode, GLint i1, GLint i2, GLint j1, GLint j2 )
{
   GET_CURRENT_CONTEXT(ctx);
   GLfloat u, du, v, dv, v1, u1;
   GLint i, j;

   switch (mode) {
   case GL_POINT:
   case GL_LINE:
   case GL_FILL:
      break;
   default:
      _mesa_error( ctx, GL_INVALID_ENUM, "glEvalMesh2(mode)" );
      return;
   }

   /* No effect if vertex maps disabled.
    */
   if (!ctx->Eval.Map2Vertex4 && 
       !ctx->Eval.Map2Vertex3 &&
       !(ctx->VertexProgram._Enabled && ctx->Eval.Map2Attrib[VERT_ATTRIB_POS]))
      return;

   du = ctx->Eval.MapGrid2du;
   dv = ctx->Eval.MapGrid2dv;
   v1 = ctx->Eval.MapGrid2v1 + j1 * dv;
   u1 = ctx->Eval.MapGrid2u1 + i1 * du;

   switch (mode) {
   case GL_POINT:
      CALL_Begin(GET_DISPATCH(), (GL_POINTS));
      for (v=v1,j=j1;j<=j2;j++,v+=dv) {
	 for (u=u1,i=i1;i<=i2;i++,u+=du) {
	    CALL_EvalCoord2f(GET_DISPATCH(), (u, v));
	 }
      }
      CALL_End(GET_DISPATCH(), ());
      break;
   case GL_LINE:
      for (v=v1,j=j1;j<=j2;j++,v+=dv) {
	 CALL_Begin(GET_DISPATCH(), (GL_LINE_STRIP));
	 for (u=u1,i=i1;i<=i2;i++,u+=du) {
	    CALL_EvalCoord2f(GET_DISPATCH(), (u, v));
	 }
	 CALL_End(GET_DISPATCH(), ());
      }
      for (u=u1,i=i1;i<=i2;i++,u+=du) {
	 CALL_Begin(GET_DISPATCH(), (GL_LINE_STRIP));
	 for (v=v1,j=j1;j<=j2;j++,v+=dv) {
	    CALL_EvalCoord2f(GET_DISPATCH(), (u, v));
	 }
	 CALL_End(GET_DISPATCH(), ());
      }
      break;
   case GL_FILL:
      for (v=v1,j=j1;j<j2;j++,v+=dv) {
	 CALL_Begin(GET_DISPATCH(), (GL_TRIANGLE_STRIP));
	 for (u=u1,i=i1;i<=i2;i++,u+=du) {
	    CALL_EvalCoord2f(GET_DISPATCH(), (u, v));
	    CALL_EvalCoord2f(GET_DISPATCH(), (u, v+dv));
	 }
	 CALL_End(GET_DISPATCH(), ());
      }
      break;
   default:
      _mesa_error( ctx, GL_INVALID_ENUM, "glEvalMesh2(mode)" );
      return;
   }
}



/**
 * Build a vertexformat of functions to use outside begin/end pairs.
 * 
 * TODO -- build a whole dispatch table for this purpose, and likewise
 * for inside begin/end.
 */
void
_mesa_noop_vtxfmt_init( GLvertexformat *vfmt )
{
   vfmt->ArrayElement = _ae_loopback_array_elt;	        /* generic helper */
   vfmt->Begin = _mesa_noop_Begin;
   vfmt->CallList = _mesa_CallList;
   vfmt->CallLists = _mesa_CallLists;
   vfmt->Color3f = _mesa_noop_Color3f;
   vfmt->Color3fv = _mesa_noop_Color3fv;
   vfmt->Color4f = _mesa_noop_Color4f;
   vfmt->Color4fv = _mesa_noop_Color4fv;
   vfmt->EdgeFlag = _mesa_noop_EdgeFlag;
   vfmt->End = _mesa_noop_End;
   vfmt->EvalCoord1f = _mesa_noop_EvalCoord1f;
   vfmt->EvalCoord1fv = _mesa_noop_EvalCoord1fv;
   vfmt->EvalCoord2f = _mesa_noop_EvalCoord2f;
   vfmt->EvalCoord2fv = _mesa_noop_EvalCoord2fv;
   vfmt->EvalPoint1 = _mesa_noop_EvalPoint1;
   vfmt->EvalPoint2 = _mesa_noop_EvalPoint2;
   vfmt->FogCoordfEXT = _mesa_noop_FogCoordfEXT;
   vfmt->FogCoordfvEXT = _mesa_noop_FogCoordfvEXT;
   vfmt->Indexf = _mesa_noop_Indexf;
   vfmt->Indexfv = _mesa_noop_Indexfv;
   vfmt->Materialfv = _mesa_noop_Materialfv;
   vfmt->MultiTexCoord1fARB = _mesa_noop_MultiTexCoord1fARB;
   vfmt->MultiTexCoord1fvARB = _mesa_noop_MultiTexCoord1fvARB;
   vfmt->MultiTexCoord2fARB = _mesa_noop_MultiTexCoord2fARB;
   vfmt->MultiTexCoord2fvARB = _mesa_noop_MultiTexCoord2fvARB;
   vfmt->MultiTexCoord3fARB = _mesa_noop_MultiTexCoord3fARB;
   vfmt->MultiTexCoord3fvARB = _mesa_noop_MultiTexCoord3fvARB;
   vfmt->MultiTexCoord4fARB = _mesa_noop_MultiTexCoord4fARB;
   vfmt->MultiTexCoord4fvARB = _mesa_noop_MultiTexCoord4fvARB;
   vfmt->Normal3f = _mesa_noop_Normal3f;
   vfmt->Normal3fv = _mesa_noop_Normal3fv;
   vfmt->SecondaryColor3fEXT = _mesa_noop_SecondaryColor3fEXT;
   vfmt->SecondaryColor3fvEXT = _mesa_noop_SecondaryColor3fvEXT;
   vfmt->TexCoord1f = _mesa_noop_TexCoord1f;
   vfmt->TexCoord1fv = _mesa_noop_TexCoord1fv;
   vfmt->TexCoord2f = _mesa_noop_TexCoord2f;
   vfmt->TexCoord2fv = _mesa_noop_TexCoord2fv;
   vfmt->TexCoord3f = _mesa_noop_TexCoord3f;
   vfmt->TexCoord3fv = _mesa_noop_TexCoord3fv;
   vfmt->TexCoord4f = _mesa_noop_TexCoord4f;
   vfmt->TexCoord4fv = _mesa_noop_TexCoord4fv;
   vfmt->Vertex2f = _mesa_noop_Vertex2f;
   vfmt->Vertex2fv = _mesa_noop_Vertex2fv;
   vfmt->Vertex3f = _mesa_noop_Vertex3f;
   vfmt->Vertex3fv = _mesa_noop_Vertex3fv;
   vfmt->Vertex4f = _mesa_noop_Vertex4f;
   vfmt->Vertex4fv = _mesa_noop_Vertex4fv;
   vfmt->VertexAttrib1fNV = _mesa_noop_VertexAttrib1fNV;
   vfmt->VertexAttrib1fvNV = _mesa_noop_VertexAttrib1fvNV;
   vfmt->VertexAttrib2fNV = _mesa_noop_VertexAttrib2fNV;
   vfmt->VertexAttrib2fvNV = _mesa_noop_VertexAttrib2fvNV;
   vfmt->VertexAttrib3fNV = _mesa_noop_VertexAttrib3fNV;
   vfmt->VertexAttrib3fvNV = _mesa_noop_VertexAttrib3fvNV;
   vfmt->VertexAttrib4fNV = _mesa_noop_VertexAttrib4fNV;
   vfmt->VertexAttrib4fvNV = _mesa_noop_VertexAttrib4fvNV;
   vfmt->VertexAttrib1fARB = _mesa_noop_VertexAttrib1fARB;
   vfmt->VertexAttrib1fvARB = _mesa_noop_VertexAttrib1fvARB;
   vfmt->VertexAttrib2fARB = _mesa_noop_VertexAttrib2fARB;
   vfmt->VertexAttrib2fvARB = _mesa_noop_VertexAttrib2fvARB;
   vfmt->VertexAttrib3fARB = _mesa_noop_VertexAttrib3fARB;
   vfmt->VertexAttrib3fvARB = _mesa_noop_VertexAttrib3fvARB;
   vfmt->VertexAttrib4fARB = _mesa_noop_VertexAttrib4fARB;
   vfmt->VertexAttrib4fvARB = _mesa_noop_VertexAttrib4fvARB;

   vfmt->Rectf = _mesa_noop_Rectf;

   vfmt->DrawArrays = _mesa_noop_DrawArrays;
   vfmt->DrawElements = _mesa_noop_DrawElements;
   vfmt->DrawRangeElements = _mesa_noop_DrawRangeElements;
   vfmt->EvalMesh1 = _mesa_noop_EvalMesh1;
   vfmt->EvalMesh2 = _mesa_noop_EvalMesh2;
}