varray.c

winNT技术操作系统,国外开放的原代码和LIUX一样

   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END(ctx);

   if (index >= ctx->Const.MaxVertexProgramAttribs) {
      _mesa_error(ctx, GL_INVALID_VALUE, "glVertexAttribPointerARB(index)");
      return;
   }

   if (size < 1 || size > 4) {
      _mesa_error(ctx, GL_INVALID_VALUE, "glVertexAttribPointerARB(size)");
      return;
   }

   if (stride < 0) {
      _mesa_error(ctx, GL_INVALID_VALUE, "glVertexAttribPointerARB(stride)");
      return;
   }

   if (type == GL_UNSIGNED_BYTE && size != 4) {
      _mesa_error(ctx, GL_INVALID_VALUE, "glVertexAttribPointerARB(size!=4)");
      return;
   }

   /* check for valid 'type' and compute StrideB right away */
   /* NOTE: more types are supported here than in the NV extension */
   switch (type) {
      case GL_BYTE:
         elementSize = size * sizeof(GLbyte);
         break;
      case GL_UNSIGNED_BYTE:
         elementSize = size * sizeof(GLubyte);
         break;
      case GL_SHORT:
         elementSize = size * sizeof(GLshort);
         break;
      case GL_UNSIGNED_SHORT:
         elementSize = size * sizeof(GLushort);
         break;
      case GL_INT:
         elementSize = size * sizeof(GLint);
         break;
      case GL_UNSIGNED_INT:
         elementSize = size * sizeof(GLuint);
         break;
      case GL_FLOAT:
         elementSize = size * sizeof(GLfloat);
         break;
      case GL_DOUBLE:
         elementSize = size * sizeof(GLdouble);
         break;
      default:
         _mesa_error( ctx, GL_INVALID_ENUM, "glVertexAttribPointerARB(type)" );
         return;
   }

   update_array(ctx, &ctx->Array.VertexAttrib[index], _NEW_ARRAY_ATTRIB(index),
                elementSize, size, type, stride, normalized, ptr);

   /* XXX fix
   if (ctx->Driver.VertexAttribPointer)
      ctx->Driver.VertexAttribPointer( ctx, index, size, type, stride, ptr );
   */
}
#endif


void GLAPIENTRY
_mesa_VertexPointerEXT(GLint size, GLenum type, GLsizei stride,
                       GLsizei count, const GLvoid *ptr)
{
   (void) count;
   _mesa_VertexPointer(size, type, stride, ptr);
}


void GLAPIENTRY
_mesa_NormalPointerEXT(GLenum type, GLsizei stride, GLsizei count,
                       const GLvoid *ptr)
{
   (void) count;
   _mesa_NormalPointer(type, stride, ptr);
}


void GLAPIENTRY
_mesa_ColorPointerEXT(GLint size, GLenum type, GLsizei stride, GLsizei count,
                      const GLvoid *ptr)
{
   (void) count;
   _mesa_ColorPointer(size, type, stride, ptr);
}


void GLAPIENTRY
_mesa_IndexPointerEXT(GLenum type, GLsizei stride, GLsizei count,
                      const GLvoid *ptr)
{
   (void) count;
   _mesa_IndexPointer(type, stride, ptr);
}


void GLAPIENTRY
_mesa_TexCoordPointerEXT(GLint size, GLenum type, GLsizei stride,
                         GLsizei count, const GLvoid *ptr)
{
   (void) count;
   _mesa_TexCoordPointer(size, type, stride, ptr);
}


void GLAPIENTRY
_mesa_EdgeFlagPointerEXT(GLsizei stride, GLsizei count, const GLboolean *ptr)
{
   (void) count;
   _mesa_EdgeFlagPointer(stride, ptr);
}


void GLAPIENTRY
_mesa_InterleavedArrays(GLenum format, GLsizei stride, const GLvoid *pointer)
{
   GET_CURRENT_CONTEXT(ctx);
   GLboolean tflag, cflag, nflag;  /* enable/disable flags */
   GLint tcomps, ccomps, vcomps;   /* components per texcoord, color, vertex */
   GLenum ctype = 0;               /* color type */
   GLint coffset = 0, noffset = 0, voffset;/* color, normal, vertex offsets */
   const GLint toffset = 0;        /* always zero */
   GLint defstride;                /* default stride */
   GLint c, f;

   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   f = sizeof(GLfloat);
   c = f * ((4 * sizeof(GLubyte) + (f - 1)) / f);

   if (stride < 0) {
      _mesa_error( ctx, GL_INVALID_VALUE, "glInterleavedArrays(stride)" );
      return;
   }

   switch (format) {
      case GL_V2F:
         tflag = GL_FALSE;  cflag = GL_FALSE;  nflag = GL_FALSE;
         tcomps = 0;  ccomps = 0;  vcomps = 2;
         voffset = 0;
         defstride = 2*f;
         break;
      case GL_V3F:
         tflag = GL_FALSE;  cflag = GL_FALSE;  nflag = GL_FALSE;
         tcomps = 0;  ccomps = 0;  vcomps = 3;
         voffset = 0;
         defstride = 3*f;
         break;
      case GL_C4UB_V2F:
         tflag = GL_FALSE;  cflag = GL_TRUE;  nflag = GL_FALSE;
         tcomps = 0;  ccomps = 4;  vcomps = 2;
         ctype = GL_UNSIGNED_BYTE;
         coffset = 0;
         voffset = c;
         defstride = c + 2*f;
         break;
      case GL_C4UB_V3F:
         tflag = GL_FALSE;  cflag = GL_TRUE;  nflag = GL_FALSE;
         tcomps = 0;  ccomps = 4;  vcomps = 3;
         ctype = GL_UNSIGNED_BYTE;
         coffset = 0;
         voffset = c;
         defstride = c + 3*f;
         break;
      case GL_C3F_V3F:
         tflag = GL_FALSE;  cflag = GL_TRUE;  nflag = GL_FALSE;
         tcomps = 0;  ccomps = 3;  vcomps = 3;
         ctype = GL_FLOAT;
         coffset = 0;
         voffset = 3*f;
         defstride = 6*f;
         break;
      case GL_N3F_V3F:
         tflag = GL_FALSE;  cflag = GL_FALSE;  nflag = GL_TRUE;
         tcomps = 0;  ccomps = 0;  vcomps = 3;
         noffset = 0;
         voffset = 3*f;
         defstride = 6*f;
         break;
      case GL_C4F_N3F_V3F:
         tflag = GL_FALSE;  cflag = GL_TRUE;  nflag = GL_TRUE;
         tcomps = 0;  ccomps = 4;  vcomps = 3;
         ctype = GL_FLOAT;
         coffset = 0;
         noffset = 4*f;
         voffset = 7*f;
         defstride = 10*f;
         break;
      case GL_T2F_V3F:
         tflag = GL_TRUE;  cflag = GL_FALSE;  nflag = GL_FALSE;
         tcomps = 2;  ccomps = 0;  vcomps = 3;
         voffset = 2*f;
         defstride = 5*f;
         break;
      case GL_T4F_V4F:
         tflag = GL_TRUE;  cflag = GL_FALSE;  nflag = GL_FALSE;
         tcomps = 4;  ccomps = 0;  vcomps = 4;
         voffset = 4*f;
         defstride = 8*f;
         break;
      case GL_T2F_C4UB_V3F:
         tflag = GL_TRUE;  cflag = GL_TRUE;  nflag = GL_FALSE;
         tcomps = 2;  ccomps = 4;  vcomps = 3;
         ctype = GL_UNSIGNED_BYTE;
         coffset = 2*f;
         voffset = c+2*f;
         defstride = c+5*f;
         break;
      case GL_T2F_C3F_V3F:
         tflag = GL_TRUE;  cflag = GL_TRUE;  nflag = GL_FALSE;
         tcomps = 2;  ccomps = 3;  vcomps = 3;
         ctype = GL_FLOAT;
         coffset = 2*f;
         voffset = 5*f;
         defstride = 8*f;
         break;
      case GL_T2F_N3F_V3F:
         tflag = GL_TRUE;  cflag = GL_FALSE;  nflag = GL_TRUE;
         tcomps = 2;  ccomps = 0;  vcomps = 3;
         noffset = 2*f;
         voffset = 5*f;
         defstride = 8*f;
         break;
      case GL_T2F_C4F_N3F_V3F:
         tflag = GL_TRUE;  cflag = GL_TRUE;  nflag = GL_TRUE;
         tcomps = 2;  ccomps = 4;  vcomps = 3;
         ctype = GL_FLOAT;
         coffset = 2*f;
         noffset = 6*f;
         voffset = 9*f;
         defstride = 12*f;
         break;
      case GL_T4F_C4F_N3F_V4F:
         tflag = GL_TRUE;  cflag = GL_TRUE;  nflag = GL_TRUE;
         tcomps = 4;  ccomps = 4;  vcomps = 4;
         ctype = GL_FLOAT;
         coffset = 4*f;
         noffset = 8*f;
         voffset = 11*f;
         defstride = 15*f;
         break;
      default:
         _mesa_error( ctx, GL_INVALID_ENUM, "glInterleavedArrays(format)" );
         return;
   }

   if (stride==0) {
      stride = defstride;
   }

   _mesa_DisableClientState( GL_EDGE_FLAG_ARRAY );
   _mesa_DisableClientState( GL_INDEX_ARRAY );

   /* Texcoords */
   if (tflag) {
      _mesa_EnableClientState( GL_TEXTURE_COORD_ARRAY );
      _mesa_TexCoordPointer( tcomps, GL_FLOAT, stride,
                             (GLubyte *) pointer + toffset );
   }
   else {
      _mesa_DisableClientState( GL_TEXTURE_COORD_ARRAY );
   }

   /* Color */
   if (cflag) {
      _mesa_EnableClientState( GL_COLOR_ARRAY );
      _mesa_ColorPointer( ccomps, ctype, stride,
			  (GLubyte *) pointer + coffset );
   }
   else {
      _mesa_DisableClientState( GL_COLOR_ARRAY );
   }


   /* Normals */
   if (nflag) {
      _mesa_EnableClientState( GL_NORMAL_ARRAY );
      _mesa_NormalPointer( GL_FLOAT, stride, (GLubyte *) pointer + noffset );
   }
   else {
      _mesa_DisableClientState( GL_NORMAL_ARRAY );
   }

   /* Vertices */
   _mesa_EnableClientState( GL_VERTEX_ARRAY );
   _mesa_VertexPointer( vcomps, GL_FLOAT, stride,
			(GLubyte *) pointer + voffset );
}


void GLAPIENTRY
_mesa_LockArraysEXT(GLint first, GLsizei count)
{
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   if (MESA_VERBOSE & VERBOSE_API)
      _mesa_debug(ctx, "glLockArrays %d %d\n", first, count);

   if (first == 0 && count > 0 &&
       count <= (GLint) ctx->Const.MaxArrayLockSize) {
      ctx->Array.LockFirst = first;
      ctx->Array.LockCount = count;
   }
   else {
      ctx->Array.LockFirst = 0;
      ctx->Array.LockCount = 0;
   }

   ctx->NewState |= _NEW_ARRAY;
   ctx->Array.NewState |= _NEW_ARRAY_ALL;

   if (ctx->Driver.LockArraysEXT)
      ctx->Driver.LockArraysEXT( ctx, first, count );
}


void GLAPIENTRY
_mesa_UnlockArraysEXT( void )
{
   GET_CURRENT_CONTEXT(ctx);
   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   if (MESA_VERBOSE & VERBOSE_API)
      _mesa_debug(ctx, "glUnlockArrays\n");

   ctx->Array.LockFirst = 0;
   ctx->Array.LockCount = 0;
   ctx->NewState |= _NEW_ARRAY;
   ctx->Array.NewState |= _NEW_ARRAY_ALL;

   if (ctx->Driver.UnlockArraysEXT)
      ctx->Driver.UnlockArraysEXT( ctx );
}


/* GL_EXT_multi_draw_arrays */
/* Somebody forgot to spec the first and count parameters as const! <sigh> */
void GLAPIENTRY
_mesa_MultiDrawArraysEXT( GLenum mode, GLint *first,
                          GLsizei *count, GLsizei primcount )
{
   GET_CURRENT_CONTEXT(ctx);
   GLint i;

   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   for (i = 0; i < primcount; i++) {
      if (count[i] > 0) {
         CALL_DrawArrays(ctx->Exec, (mode, first[i], count[i]));
      }
   }
}


/* GL_EXT_multi_draw_arrays */
void GLAPIENTRY
_mesa_MultiDrawElementsEXT( GLenum mode, const GLsizei *count, GLenum type,
                            const GLvoid **indices, GLsizei primcount )
{
   GET_CURRENT_CONTEXT(ctx);
   GLint i;

   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   for (i = 0; i < primcount; i++) {
      if (count[i] > 0) {
         CALL_DrawElements(ctx->Exec, (mode, count[i], type, indices[i]));
      }
   }
}


/* GL_IBM_multimode_draw_arrays */
void GLAPIENTRY
_mesa_MultiModeDrawArraysIBM( const GLenum * mode, const GLint * first,
			      const GLsizei * count,
			      GLsizei primcount, GLint modestride )
{
   GET_CURRENT_CONTEXT(ctx);
   GLint i;

   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   for ( i = 0 ; i < primcount ; i++ ) {
      if ( count[i] > 0 ) {
         GLenum m = *((GLenum *) ((GLubyte *) mode + i * modestride));
	 CALL_DrawArrays(ctx->Exec, ( m, first[i], count[i] ));
      }
   }
}


/* GL_IBM_multimode_draw_arrays */
void GLAPIENTRY
_mesa_MultiModeDrawElementsIBM( const GLenum * mode, const GLsizei * count,
				GLenum type, const GLvoid * const * indices,
				GLsizei primcount, GLint modestride )
{
   GET_CURRENT_CONTEXT(ctx);
   GLint i;

   ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx);

   /* XXX not sure about ARB_vertex_buffer_object handling here */

   for ( i = 0 ; i < primcount ; i++ ) {
      if ( count[i] > 0 ) {
         GLenum m = *((GLenum *) ((GLubyte *) mode + i * modestride));
	 CALL_DrawElements(ctx->Exec, ( m, count[i], type, indices[i] ));
      }
   }
}


/**********************************************************************/
/*****                      Initialization                        *****/
/**********************************************************************/

void 
_mesa_init_varray( GLcontext * ctx )
{
   GLuint i;

   /* Vertex arrays */
   ctx->Array.Vertex.Size = 4;
   ctx->Array.Vertex.Type = GL_FLOAT;
   ctx->Array.Vertex.Stride = 0;
   ctx->Array.Vertex.StrideB = 0;
   ctx->Array.Vertex.Ptr = NULL;
   ctx->Array.Vertex.Enabled = GL_FALSE;
   ctx->Array.Vertex.Flags = CA_CLIENT_DATA;
   ctx->Array.Normal.Type = GL_FLOAT;
   ctx->Array.Normal.Stride = 0;
   ctx->Array.Normal.StrideB = 0;
   ctx->Array.Normal.Ptr = NULL;
   ctx->Array.Normal.Enabled = GL_FALSE;
   ctx->Array.Normal.Flags = CA_CLIENT_DATA;
   ctx->Array.Color.Size = 4;
   ctx->Array.Color.Type = GL_FLOAT;
   ctx->Array.Color.Stride = 0;
   ctx->Array.Color.StrideB = 0;
   ctx->Array.Color.Ptr = NULL;
   ctx->Array.Color.Enabled = GL_FALSE;
   ctx->Array.Color.Flags = CA_CLIENT_DATA;
   ctx->Array.SecondaryColor.Size = 4;
   ctx->Array.SecondaryColor.Type = GL_FLOAT;
   ctx->Array.SecondaryColor.Stride = 0;
   ctx->Array.SecondaryColor.StrideB = 0;
   ctx->Array.SecondaryColor.Ptr = NULL;
   ctx->Array.SecondaryColor.Enabled = GL_FALSE;
   ctx->Array.SecondaryColor.Flags = CA_CLIENT_DATA;
   ctx->Array.FogCoord.Size = 1;
   ctx->Array.FogCoord.Type = GL_FLOAT;
   ctx->Array.FogCoord.Stride = 0;
   ctx->Array.FogCoord.StrideB = 0;
   ctx->Array.FogCoord.Ptr = NULL;
   ctx->Array.FogCoord.Enabled = GL_FALSE;
   ctx->Array.FogCoord.Flags = CA_CLIENT_DATA;
   ctx->Array.Index.Type = GL_FLOAT;
   ctx->Array.Index.Stride = 0;
   ctx->Array.Index.StrideB = 0;
   ctx->Array.Index.Ptr = NULL;
   ctx->Array.Index.Enabled = GL_FALSE;
   ctx->Array.Index.Flags = CA_CLIENT_DATA;
   for (i = 0; i < MAX_TEXTURE_UNITS; i++) {
      ctx->Array.TexCoord[i].Size = 4;
      ctx->Array.TexCoord[i].Type = GL_FLOAT;
      ctx->Array.TexCoord[i].Stride = 0;
      ctx->Array.TexCoord[i].StrideB = 0;
      ctx->Array.TexCoord[i].Ptr = NULL;
      ctx->Array.TexCoord[i].Enabled = GL_FALSE;
      ctx->Array.TexCoord[i].Flags = CA_CLIENT_DATA;
   }
   ctx->Array.EdgeFlag.Stride = 0;
   ctx->Array.EdgeFlag.StrideB = 0;
   ctx->Array.EdgeFlag.Ptr = NULL;
   ctx->Array.EdgeFlag.Enabled = GL_FALSE;
   ctx->Array.EdgeFlag.Flags = CA_CLIENT_DATA;
   ctx->Array.ActiveTexture = 0;   /* GL_ARB_multitexture */
   for (i = 0; i < VERT_ATTRIB_MAX; i++) {
      ctx->Array.VertexAttrib[i].Size = 4;
      ctx->Array.VertexAttrib[i].Type = GL_FLOAT;
      ctx->Array.VertexAttrib[i].Stride = 0;
      ctx->Array.VertexAttrib[i].StrideB = 0;
      ctx->Array.VertexAttrib[i].Ptr = NULL;
      ctx->Array.VertexAttrib[i].Enabled = GL_FALSE;
      ctx->Array.VertexAttrib[i].Flags = CA_CLIENT_DATA;
   }
}