From c03f0b3c893f2bc2ae4f1e1825c5ac1453c36710 Mon Sep 17 00:00:00 2001
From: Fernando Sahmkow <fsahmkow27@gmail.com>
Date: Fri, 18 Aug 2023 18:30:31 +0200
Subject: Shader Recomnpiler: implement textuzreGrad 3D emulation constant
propagation
---
src/shader_recompiler/backend/glsl/emit_glsl_image.cpp | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
(limited to 'src/shader_recompiler/backend/glsl/emit_glsl_image.cpp')
diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_image.cpp b/src/shader_recompiler/backend/glsl/emit_glsl_image.cpp
index 418505475e..3ad668a47e 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl_image.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_image.cpp
@@ -548,7 +548,7 @@ void EmitImageGradient(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
if (sparse_inst) {
throw NotImplementedException("EmitImageGradient Sparse");
}
- if (!offset.IsEmpty()) {
+ if (!offset.IsEmpty() && info.num_derivates <= 2) {
throw NotImplementedException("EmitImageGradient offset");
}
const auto texture{Texture(ctx, info, index)};
@@ -556,6 +556,12 @@ void EmitImageGradient(EmitContext& ctx, IR::Inst& inst, const IR::Value& index,
const bool multi_component{info.num_derivates > 1 || info.has_lod_clamp};
const auto derivatives_vec{ctx.var_alloc.Consume(derivatives)};
if (multi_component) {
+ if (info.num_derivates >= 3) {
+ const auto offset_vec{ctx.var_alloc.Consume(offset)};
+ ctx.Add("{}=textureGrad({},{},vec3({}.xz, {}.x),vec3({}.yz, {}.y));", texel, texture,
+ coords, derivatives_vec, offset_vec, derivatives_vec, offset_vec);
+ return;
+ }
ctx.Add("{}=textureGrad({},{},vec2({}.xz),vec2({}.yz));", texel, texture, coords,
derivatives_vec, derivatives_vec);
} else {
--
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