@ -927,7 +927,8 @@ static struct vrend_linked_shader_program *add_shader_program(struct vrend_conte
if ( gs - > id > 0 )
glAttachShader ( prog_id , gs - > id ) ;
set_stream_out_varyings ( prog_id , & gs - > sel - > sinfo ) ;
}
} else if ( tes )
set_stream_out_varyings ( prog_id , & tes - > sel - > sinfo ) ;
else
set_stream_out_varyings ( prog_id , & vs - > sel - > sinfo ) ;
glAttachShader ( prog_id , fs - > id ) ;
@ -2773,6 +2774,22 @@ static GLenum get_gs_xfb_mode(GLenum mode)
}
}
static GLenum get_tess_xfb_mode ( int mode , bool is_point_mode )
{
if ( is_point_mode )
return GL_POINTS ;
switch ( mode ) {
case GL_QUADS :
case GL_TRIANGLES :
return GL_TRIANGLES ;
case GL_LINES :
return GL_LINES ;
default :
fprintf ( stderr , " illegal gs transform feedback mode %d \n " , mode ) ;
return GL_POINTS ;
}
}
static GLenum get_xfb_mode ( GLenum mode )
{
switch ( mode ) {
@ -3225,6 +3242,9 @@ void vrend_draw_vbo(struct vrend_context *ctx,
if ( ctx - > sub - > current_so - > xfb_state = = XFB_STATE_STARTED_NEED_BEGIN ) {
if ( ctx - > sub - > shaders [ PIPE_SHADER_GEOMETRY ] )
glBeginTransformFeedback ( get_gs_xfb_mode ( ctx - > sub - > shaders [ PIPE_SHADER_GEOMETRY ] - > sinfo . gs_out_prim ) ) ;
else if ( ctx - > sub - > shaders [ PIPE_SHADER_TESS_EVAL ] )
glBeginTransformFeedback ( get_tess_xfb_mode ( ctx - > sub - > shaders [ PIPE_SHADER_TESS_EVAL ] - > sinfo . tes_prim ,
ctx - > sub - > shaders [ PIPE_SHADER_TESS_EVAL ] - > sinfo . tes_point_mode ) ) ;
else
glBeginTransformFeedback ( get_xfb_mode ( info - > mode ) ) ;
ctx - > sub - > current_so - > xfb_state = XFB_STATE_STARTED ;