From 14bfb4719ad366745b5d16452914c4c78e43b8ae Mon Sep 17 00:00:00 2001
From: ameerj <52414509+ameerj@users.noreply.github.com>
Date: Sun, 30 May 2021 22:42:52 -0400
Subject: [PATCH] HACK glsl: Write defaults to unused generic attributes

---
 src/shader_recompiler/backend/glsl/emit_context.cpp | 7 +++++--
 src/shader_recompiler/backend/glsl/emit_glsl.cpp    | 6 ++++++
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/shader_recompiler/backend/glsl/emit_context.cpp b/src/shader_recompiler/backend/glsl/emit_context.cpp
index 788679f40..8de33b582 100644
--- a/src/shader_recompiler/backend/glsl/emit_context.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_context.cpp
@@ -110,8 +110,11 @@ EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile
         header += fmt::format("layout(location={})out vec4 frag_color{};", index, index);
     }
     for (size_t index = 0; index < info.stores_generics.size(); ++index) {
-        if (info.stores_generics[index]) {
-            header += fmt::format("layout(location={}) out vec4 out_attr{};", index, index);
+        // TODO: Properly resolve attribute issues
+        const auto declaration{
+            fmt::format("layout(location={}) out vec4 out_attr{};", index, index)};
+        if (info.stores_generics[index] || stage == Stage::VertexA || stage == Stage::VertexB) {
+            header += declaration;
         }
     }
     DefineConstantBuffers(bindings);
diff --git a/src/shader_recompiler/backend/glsl/emit_glsl.cpp b/src/shader_recompiler/backend/glsl/emit_glsl.cpp
index f0257db7f..19cf4e46b 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_glsl.cpp
@@ -209,6 +209,12 @@ std::string EmitGLSL(const Profile& profile, const RuntimeInfo& runtime_info, IR
     ctx.header += "void main(){\n";
     if (program.stage == Stage::VertexA || program.stage == Stage::VertexB) {
         ctx.header += "gl_Position = vec4(0.0f, 0.0f, 0.0f, 1.0f);";
+        // TODO: Properly resolve attribute issues
+        for (size_t index = 0; index < program.info.stores_generics.size() / 2; ++index) {
+            if (!program.info.stores_generics[index]) {
+                ctx.header += fmt::format("out_attr{}=vec4(0,0,0,1);", index);
+            }
+        }
     }
     DefineVariables(ctx, ctx.header);
     if (ctx.uses_cc_carry) {