diff options
| author | Eric Anholt <[email protected]> | 2014-12-15 15:11:07 -0800 |
|---|---|---|
| committer | Eric Anholt <[email protected]> | 2014-12-16 10:37:34 -0800 |
| commit | 3f6b008168d2edcb673fefba53031d4bfaa0982e (patch) | |
| tree | 2084c362a596343360e70f5f43beeaf6f5b708ea | |
| parent | c6e8d2c6593820e48eb2f1088c4d06ad633e509e (diff) | |
vc4: Add support for enabling early Z discards.
This is the same basic logic from the original Broadcom driver.
| -rw-r--r-- | src/gallium/drivers/vc4/vc4_state.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/src/gallium/drivers/vc4/vc4_state.c b/src/gallium/drivers/vc4/vc4_state.c index 630ac4dc04f..332f3108241 100644 --- a/src/gallium/drivers/vc4/vc4_state.c +++ b/src/gallium/drivers/vc4/vc4_state.c @@ -186,12 +186,30 @@ vc4_create_depth_stencil_alpha_state(struct pipe_context *pctx, so->base = *cso; + /* We always keep the early Z state correct, since a later state using + * early Z may want it. + */ + so->config_bits[2] |= VC4_CONFIG_BITS_EARLY_Z_UPDATE; + if (cso->depth.enabled) { if (cso->depth.writemask) { so->config_bits[1] |= VC4_CONFIG_BITS_Z_UPDATE; } so->config_bits[1] |= (cso->depth.func << VC4_CONFIG_BITS_DEPTH_FUNC_SHIFT); + + /* We only handle early Z in the < direction because otherwise + * we'd have to runtime guess which direction to set in the + * render config. + */ + if ((cso->depth.func == PIPE_FUNC_LESS || + cso->depth.func == PIPE_FUNC_LEQUAL) && + (!cso->stencil[0].enabled || + (cso->stencil[0].zfail_op == PIPE_STENCIL_OP_KEEP && + (!cso->stencil[1].enabled || + cso->stencil[1].zfail_op == PIPE_STENCIL_OP_KEEP)))) { + so->config_bits[2] |= VC4_CONFIG_BITS_EARLY_Z; + } } else { so->config_bits[1] |= (PIPE_FUNC_ALWAYS << VC4_CONFIG_BITS_DEPTH_FUNC_SHIFT); |