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panfrost: Copy stencil front to back if back disabled

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When backside stenciling is disabled, backfacing primitives just do the
same thing as frontfacing primitives.

Signed-off-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
This commit is contained in:
Alyssa Rosenzweig 2019-07-17 15:42:48 -07:00
parent 6f7306c029
commit 65d89097b8
1 changed files with 14 additions and 5 deletions
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19
src/gallium/drivers/panfrost/pan_context.c
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@ -1126,8 +1126,13 @@ panfrost_emit_for_draw(struct panfrost_context *ctx, bool with_vertex_data)
ctx->fragment_shader_core.midgard1.flags = flags;
/* Assign the stencil refs late */
ctx->fragment_shader_core.stencil_front.ref = ctx->stencil_ref.ref_value[0];
ctx->fragment_shader_core.stencil_back.ref = ctx->stencil_ref.ref_value[1];
unsigned front_ref = ctx->stencil_ref.ref_value[0];
unsigned back_ref = ctx->stencil_ref.ref_value[1];
bool back_enab = ctx->depth_stencil->stencil[1].enabled;
ctx->fragment_shader_core.stencil_front.ref = front_ref;
ctx->fragment_shader_core.stencil_back.ref = back_enab ? back_ref : front_ref;
/* CAN_DISCARD should be set if the fragment shader possibly
* contains a 'discard' instruction. It is likely this is
@ -2431,13 +2436,17 @@ panfrost_bind_depth_stencil_state(struct pipe_context *pipe,
}
/* Stencil state */
SET_BIT(ctx->fragment_shader_core.unknown2_4, MALI_STENCIL_TEST, depth_stencil->stencil[0].enabled); /* XXX: which one? */
SET_BIT(ctx->fragment_shader_core.unknown2_4, MALI_STENCIL_TEST, depth_stencil->stencil[0].enabled);
panfrost_make_stencil_state(&depth_stencil->stencil[0], &ctx->fragment_shader_core.stencil_front);
ctx->fragment_shader_core.stencil_mask_front = depth_stencil->stencil[0].writemask;
panfrost_make_stencil_state(&depth_stencil->stencil[1], &ctx->fragment_shader_core.stencil_back);
ctx->fragment_shader_core.stencil_mask_back = depth_stencil->stencil[1].writemask;
/* If back-stencil is not enabled, use the front values */
bool back_enab = ctx->depth_stencil->stencil[1].enabled;
unsigned back_index = back_enab ? 1 : 0;
panfrost_make_stencil_state(&depth_stencil->stencil[back_index], &ctx->fragment_shader_core.stencil_back);
ctx->fragment_shader_core.stencil_mask_back = depth_stencil->stencil[back_index].writemask;
/* Depth state (TODO: Refactor) */
SET_BIT(ctx->fragment_shader_core.unknown2_3, MALI_DEPTH_TEST, depth_stencil->depth.enabled);