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glsl: Extend lowering pass for gl_ClipDistance to support other arrays (v4)

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This will come in handy when we want to lower gl_CullDistance into
gl_CullDistanceMESA.

[airlied: drop separate APIs for clip/cull - just use single API
to call both passes.]

v3: reexamine my sanity, this was pretty broken, the new code
creates one copy of gl_ClipDistanceMESA, as the clip distance
varying and lowers everything into that in two passes, one for clips
one for culls.
v4: rework using the passes in clip/cull sizes, instead of the
array sizes.

Signed-off-by: Tobias Klausmann <tobias.johannes.klausmann@mni.thm.de>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Kristian Høgsberg <krh@bitplanet.net>
This commit is contained in:
Tobias Klausmann
2016-05-08 22:44:05 +02:00
committed by Dave Airlie
parent dd3390e12f
commit ad355652c2
3 changed files with 160 additions and 95 deletions
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4
src/compiler/glsl/ir_optimization.h
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@@ -117,7 +117,9 @@ bool lower_variable_index_to_cond_assign(gl_shader_stage stage,
bool lower_temp, bool lower_uniform);
bool lower_quadop_vector(exec_list *instructions, bool dont_lower_swz);
bool lower_const_arrays_to_uniforms(exec_list *instructions);
bool lower_clip_distance(gl_shader *shader);
bool lower_combined_clip_cull_distance(gl_shader *shader,
uint8_t clipDistanceArraySize,
uint8_t cullDistanceArraySize);
void lower_output_reads(unsigned stage, exec_list *instructions);
bool lower_packing_builtins(exec_list *instructions, int op_mask);
void lower_shared_reference(struct gl_shader *shader, unsigned *shared_size);