Mesa (master): etnaviv: nir: fix gl_FrontFacing
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Sat Sep 28 04:54:19 UTC 2019
Module: Mesa
Branch: master
Commit: 7da15bdd2d05cc252b28cf385bf2cf2b31aa576b
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=7da15bdd2d05cc252b28cf385bf2cf2b31aa576b
Author: Jonathan Marek <jonathan at marek.ca>
Date: Wed Sep 11 13:42:43 2019 -0400
etnaviv: nir: fix gl_FrontFacing
Only invert front facing when glFrontFace is GL_CW.
Fixes following deqp test:
dEQP-GLES2.functional.shaders.builtin_variable.frontfacing
Signed-off-by: Jonathan Marek <jonathan at marek.ca>
Reviewed-by: Christian Gmeiner <christian.gmeiner at gmail.com>
---
src/gallium/drivers/etnaviv/etnaviv_compiler_nir.c | 3 +++
src/gallium/drivers/etnaviv/etnaviv_context.c | 5 ++++-
src/gallium/drivers/etnaviv/etnaviv_shader.h | 2 ++
3 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/src/gallium/drivers/etnaviv/etnaviv_compiler_nir.c b/src/gallium/drivers/etnaviv/etnaviv_compiler_nir.c
index c2bfec14ed2..a00f89b4e21 100644
--- a/src/gallium/drivers/etnaviv/etnaviv_compiler_nir.c
+++ b/src/gallium/drivers/etnaviv/etnaviv_compiler_nir.c
@@ -98,6 +98,9 @@ etna_lower_io(nir_shader *shader, struct etna_shader_variant *v)
switch (intr->intrinsic) {
case nir_intrinsic_load_front_face: {
+ if (!v->key.front_ccw)
+ break;
+
/* front face inverted (run after int_to_float, so invert as float) */
b.cursor = nir_after_instr(instr);
diff --git a/src/gallium/drivers/etnaviv/etnaviv_context.c b/src/gallium/drivers/etnaviv/etnaviv_context.c
index b3ced5ea246..82254f9c1c1 100644
--- a/src/gallium/drivers/etnaviv/etnaviv_context.c
+++ b/src/gallium/drivers/etnaviv/etnaviv_context.c
@@ -214,7 +214,10 @@ etna_draw_vbo(struct pipe_context *pctx, const struct pipe_draw_info *info)
}
ctx->dirty |= ETNA_DIRTY_INDEX_BUFFER;
- struct etna_shader_key key = {};
+ struct etna_shader_key key = {
+ .front_ccw = ctx->rasterizer->front_ccw,
+ };
+
if (pfb->cbufs[0])
key.frag_rb_swap = !!translate_rs_format_rb_swap(pfb->cbufs[0]->format);
diff --git a/src/gallium/drivers/etnaviv/etnaviv_shader.h b/src/gallium/drivers/etnaviv/etnaviv_shader.h
index 3c5b6e65d94..528603a55a9 100644
--- a/src/gallium/drivers/etnaviv/etnaviv_shader.h
+++ b/src/gallium/drivers/etnaviv/etnaviv_shader.h
@@ -43,6 +43,8 @@ struct etna_shader_key
/* do we need to swap rb in frag color? */
unsigned frag_rb_swap : 1;
+ /* do we need to invert front facing value? */
+ unsigned front_ccw : 1;
};
uint32_t global;
};
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