Module: Mesa Branch: master Commit: f87dccdc19416fd8d47b995f9b0f0c54534bfd16 URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=f87dccdc19416fd8d47b995f9b0f0c54534bfd16
Author: Chia-I Wu <[email protected]> Date: Thu May 2 14:28:12 2013 +0800 util/prim: add u_reduced_prims_for_vertices() The function returns the number of reduced/tessellated primitives for the given vertex count. Signed-off-by: Chia-I Wu <[email protected]> Acked-by: Zack Rusin <[email protected]> --- src/gallium/auxiliary/util/u_prim.h | 20 ++++++++++++++++++++ 1 files changed, 20 insertions(+), 0 deletions(-) diff --git a/src/gallium/auxiliary/util/u_prim.h b/src/gallium/auxiliary/util/u_prim.h index 624a508..8f444a3 100644 --- a/src/gallium/auxiliary/util/u_prim.h +++ b/src/gallium/auxiliary/util/u_prim.h @@ -243,6 +243,26 @@ u_decomposed_prims_for_vertices(int primitive, int vertices) } } +/** + * Returns the number of reduced/tessellated primitives for the given vertex + * count. Each quad is treated as two triangles. Polygons are treated as + * triangle fans. + */ +static INLINE unsigned +u_reduced_prims_for_vertices(int primitive, int vertices) +{ + switch (primitive) { + case PIPE_PRIM_QUADS: + case PIPE_PRIM_QUAD_STRIP: + return u_decomposed_prims_for_vertices(primitive, vertices) * 2; + case PIPE_PRIM_POLYGON: + primitive = PIPE_PRIM_TRIANGLE_FAN; + /* fall through */ + default: + return u_decomposed_prims_for_vertices(primitive, vertices); + } +} + const char *u_prim_name( unsigned pipe_prim ); #endif _______________________________________________ mesa-commit mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/mesa-commit
