diff options
Diffstat (limited to 'src/mesa/state_tracker/st_draw.c')
| -rw-r--r-- | src/mesa/state_tracker/st_draw.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/src/mesa/state_tracker/st_draw.c b/src/mesa/state_tracker/st_draw.c index f4af23da97f..5dcaff09c03 100644 --- a/src/mesa/state_tracker/st_draw.c +++ b/src/mesa/state_tracker/st_draw.c @@ -205,8 +205,19 @@ st_draw_vbo(struct gl_context *ctx, /* The VBO module handles restart for the non-indexed GLDrawArrays * so we only set these fields for indexed drawing: */ - info.primitive_restart = ctx->Array._PrimitiveRestart; - info.restart_index = _mesa_primitive_restart_index(ctx, ib->type); + if (ctx->Array._PrimitiveRestart) { + info.restart_index = _mesa_primitive_restart_index(ctx, ib->type); + + /* Enable primitive restart only when the restart index can have an + * effect. This is required for correctness in radeonsi VI support, + * though other hardware may also benefit from taking a faster, + * non-restart path when possible. + */ + if ((ibuffer.index_size >= 4) || + (ibuffer.index_size >= 2 && info.restart_index <= 0xffff) || + (info.restart_index <= 0xff)) + info.primitive_restart = true; + } } else { /* Transform feedback drawing is always non-indexed. */ |