diff options
| -rw-r--r-- | src/mesa/tnl/t_vertex.c | 45 | ||||
| -rw-r--r-- | src/mesa/tnl/t_vertex.h | 6 |
2 files changed, 50 insertions, 1 deletions
diff --git a/src/mesa/tnl/t_vertex.c b/src/mesa/tnl/t_vertex.c index b661524c870..10b78f820ea 100644 --- a/src/mesa/tnl/t_vertex.c +++ b/src/mesa/tnl/t_vertex.c @@ -376,6 +376,22 @@ void _tnl_notify_pipeline_output_change( GLcontext *ctx ) invalidate_funcs(vtx); } + +static void adjust_input_ptrs( GLcontext *ctx, GLint diff) +{ + struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb; + struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx); + struct tnl_clipspace_attr *a = vtx->attr; + const GLuint count = vtx->attr_count; + int j; + + diff -= 1; + for (j=0; j<count; ++j) { + register GLvector4f *vptr = VB->AttribPtr[a->attrib]; + (a++)->inputptr += diff*vptr->stride; + } +} + static void update_input_ptrs( GLcontext *ctx, GLuint start ) { struct vertex_buffer *VB = &TNL_CONTEXT(ctx)->vb; @@ -431,13 +447,40 @@ void *_tnl_emit_vertices_to_buffer( GLcontext *ctx, struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx); update_input_ptrs(ctx, start); - /* Note: dest should not be adjusted for non-zero 'start' values: */ vtx->emit( ctx, end - start, (GLubyte*) dest ); return (void *)((GLubyte *)dest + vtx->vertex_size * (end - start)); } +/* Emit indexed VB vertices start..end to dest. Note that VB vertex at + * postion start will be emitted to dest at position zero. + */ + +void *_tnl_emit_indexed_vertices_to_buffer( GLcontext *ctx, + const GLuint *elts, + GLuint start, + GLuint end, + void *dest ) +{ + struct tnl_clipspace *vtx = GET_VERTEX_STATE(ctx); + GLuint oldIndex; + GLubyte *cdest = dest; + + update_input_ptrs(ctx, oldIndex = elts[start++]); + vtx->emit( ctx, 1, cdest ); + cdest += vtx->vertex_size; + + for (; start < end; ++start) { + adjust_input_ptrs(ctx, elts[start] - oldIndex); + oldIndex = elts[start]; + vtx->emit( ctx, 1, cdest); + cdest += vtx->vertex_size; + } + + return (void *) cdest; +} + void _tnl_init_vertices( GLcontext *ctx, GLuint vb_size, diff --git a/src/mesa/tnl/t_vertex.h b/src/mesa/tnl/t_vertex.h index 712311a1463..16071fb6955 100644 --- a/src/mesa/tnl/t_vertex.h +++ b/src/mesa/tnl/t_vertex.h @@ -118,6 +118,12 @@ extern void *_tnl_emit_vertices_to_buffer( GLcontext *ctx, GLuint start, GLuint end, void *dest ); +extern void *_tnl_emit_indexed_vertices_to_buffer( GLcontext *ctx, + const GLuint *elts, + GLuint start, + GLuint end, + void *dest ); + extern void _tnl_build_vertices( GLcontext *ctx, GLuint start, |