Remove glsl handle legacy related code

src/shader_recompiler/backend/glsl/emit_glsl.cpp

@@ -176,7 +176,7 @@ void EmitCode(EmitContext& ctx, const IR::Program& program) {
 }
 
 std::string GlslVersionSpecifier(const EmitContext& ctx) {
-    if (ctx.uses_y_direction || ctx.info.stores.Legacy() || ctx.info.loads.Legacy()) {
+    if (ctx.uses_y_direction) {
         return " compatibility";
     }
     return "";

src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp

@@ -98,10 +98,6 @@ void GetCbuf16(EmitContext& ctx, IR::Inst& inst, const IR::Value& binding, const
         GetCbuf(ctx, ret, binding, offset, 16, cast, bit_offset);
     }
 }
-
-u32 TexCoordIndex(IR::Attribute attr) {
-    return (static_cast<u32>(attr) - static_cast<u32>(IR::Attribute::FixedFncTexture0S)) / 4;
-}
 } // Anonymous namespace
 
 void EmitGetCbufU8(EmitContext& ctx, IR::Inst& inst, const IR::Value& binding,
@@ -190,18 +186,6 @@ void EmitGetAttribute(EmitContext& ctx, IR::Inst& inst, IR::Attribute attr,
         ctx.AddF32("{}=in_attr{}{}.{};", inst, index, InputVertexIndex(ctx, vertex), swizzle);
         return;
     }
-    // GLSL only exposes 8 legacy texcoords
-    if (attr >= IR::Attribute::FixedFncTexture8S && attr <= IR::Attribute::FixedFncTexture9Q) {
-        LOG_WARNING(Shader_GLSL, "GLSL does not allow access to gl_TexCoord[{}]",
-                    TexCoordIndex(attr));
-        ctx.AddF32("{}=0.f;", inst);
-        return;
-    }
-    if (attr >= IR::Attribute::FixedFncTexture0S && attr <= IR::Attribute::FixedFncTexture7Q) {
-        const u32 index{TexCoordIndex(attr)};
-        ctx.AddF32("{}=gl_TexCoord[{}].{};", inst, index, swizzle);
-        return;
-    }
     switch (attr) {
     case IR::Attribute::PrimitiveId:
         ctx.AddF32("{}=itof(gl_PrimitiveID);", inst);
@@ -215,16 +199,6 @@ void EmitGetAttribute(EmitContext& ctx, IR::Inst& inst, IR::Attribute attr,
         ctx.AddF32("{}={}{}.{};", inst, input_decorator, ctx.position_name, swizzle);
         break;
     }
-    case IR::Attribute::ColorFrontDiffuseR:
-    case IR::Attribute::ColorFrontDiffuseG:
-    case IR::Attribute::ColorFrontDiffuseB:
-    case IR::Attribute::ColorFrontDiffuseA:
-        if (ctx.stage == Stage::Fragment) {
-            ctx.AddF32("{}=gl_Color.{};", inst, swizzle);
-        } else {
-            ctx.AddF32("{}=gl_FrontColor.{};", inst, swizzle);
-        }
-        break;
     case IR::Attribute::PointSpriteS:
     case IR::Attribute::PointSpriteT:
         ctx.AddF32("{}=gl_PointCoord.{};", inst, swizzle);
@@ -264,17 +238,6 @@ void EmitSetAttribute(EmitContext& ctx, IR::Attribute attr, std::string_view val
     }
     const u32 element{static_cast<u32>(attr) % 4};
     const char swizzle{"xyzw"[element]};
-    // GLSL only exposes 8 legacy texcoords
-    if (attr >= IR::Attribute::FixedFncTexture8S && attr <= IR::Attribute::FixedFncTexture9Q) {
-        LOG_WARNING(Shader_GLSL, "GLSL does not allow access to gl_TexCoord[{}]",
-                    TexCoordIndex(attr));
-        return;
-    }
-    if (attr >= IR::Attribute::FixedFncTexture0S && attr <= IR::Attribute::FixedFncTexture7Q) {
-        const u32 index{TexCoordIndex(attr)};
-        ctx.Add("gl_TexCoord[{}].{}={};", index, swizzle, value);
-        return;
-    }
     switch (attr) {
     case IR::Attribute::Layer:
         if (ctx.stage != Stage::Geometry &&
@@ -312,33 +275,6 @@ void EmitSetAttribute(EmitContext& ctx, IR::Attribute attr, std::string_view val
     case IR::Attribute::PositionW:
         ctx.Add("gl_Position.{}={};", swizzle, value);
         break;
-    case IR::Attribute::ColorFrontDiffuseR:
-    case IR::Attribute::ColorFrontDiffuseG:
-    case IR::Attribute::ColorFrontDiffuseB:
-    case IR::Attribute::ColorFrontDiffuseA:
-        ctx.Add("gl_FrontColor.{}={};", swizzle, value);
-        break;
-    case IR::Attribute::ColorFrontSpecularR:
-    case IR::Attribute::ColorFrontSpecularG:
-    case IR::Attribute::ColorFrontSpecularB:
-    case IR::Attribute::ColorFrontSpecularA:
-        ctx.Add("gl_FrontSecondaryColor.{}={};", swizzle, value);
-        break;
-    case IR::Attribute::ColorBackDiffuseR:
-    case IR::Attribute::ColorBackDiffuseG:
-    case IR::Attribute::ColorBackDiffuseB:
-    case IR::Attribute::ColorBackDiffuseA:
-        ctx.Add("gl_BackColor.{}={};", swizzle, value);
-        break;
-    case IR::Attribute::ColorBackSpecularR:
-    case IR::Attribute::ColorBackSpecularG:
-    case IR::Attribute::ColorBackSpecularB:
-    case IR::Attribute::ColorBackSpecularA:
-        ctx.Add("gl_BackSecondaryColor.{}={};", swizzle, value);
-        break;
-    case IR::Attribute::FogCoordinate:
-        ctx.Add("gl_FogFragCoord={};", value);
-        break;
     case IR::Attribute::ClipDistance0:
     case IR::Attribute::ClipDistance1:
     case IR::Attribute::ClipDistance2:

src/shader_recompiler/backend/glsl/glsl_emit_context.cpp

@@ -211,27 +211,6 @@ std::string_view OutputPrimitive(OutputTopology topology) {
     throw InvalidArgument("Invalid output topology {}", topology);
 }
 
-void SetupLegacyOutPerVertex(EmitContext& ctx, std::string& header) {
-    if (!ctx.info.stores.Legacy()) {
-        return;
-    }
-    if (ctx.info.stores.FixedFunctionTexture()) {
-        header += "vec4 gl_TexCoord[8];";
-    }
-    if (ctx.info.stores.AnyComponent(IR::Attribute::ColorFrontDiffuseR)) {
-        header += "vec4 gl_FrontColor;";
-    }
-    if (ctx.info.stores.AnyComponent(IR::Attribute::ColorFrontSpecularR)) {
-        header += "vec4 gl_FrontSecondaryColor;";
-    }
-    if (ctx.info.stores.AnyComponent(IR::Attribute::ColorBackDiffuseR)) {
-        header += "vec4 gl_BackColor;";
-    }
-    if (ctx.info.stores.AnyComponent(IR::Attribute::ColorBackSpecularR)) {
-        header += "vec4 gl_BackSecondaryColor;";
-    }
-}
-
 void SetupOutPerVertex(EmitContext& ctx, std::string& header) {
     if (!StoresPerVertexAttributes(ctx.stage)) {
         return;
@@ -250,7 +229,6 @@ void SetupOutPerVertex(EmitContext& ctx, std::string& header) {
         ctx.profile.support_viewport_index_layer_non_geometry && ctx.stage != Stage::Geometry) {
         header += "int gl_ViewportIndex;";
     }
-    SetupLegacyOutPerVertex(ctx, header);
     header += "};";
     if (ctx.info.stores[IR::Attribute::ViewportIndex] && ctx.stage == Stage::Geometry) {
         header += "out int gl_ViewportIndex;";
@@ -282,21 +260,6 @@ void SetupInPerVertex(EmitContext& ctx, std::string& header) {
     }
     header += "}gl_in[gl_MaxPatchVertices];";
 }
-
-void SetupLegacyInPerFragment(EmitContext& ctx, std::string& header) {
-    if (!ctx.info.loads.Legacy()) {
-        return;
-    }
-    header += "in gl_PerFragment{";
-    if (ctx.info.loads.FixedFunctionTexture()) {
-        header += "vec4 gl_TexCoord[8];";
-    }
-    if (ctx.info.loads.AnyComponent(IR::Attribute::ColorFrontDiffuseR)) {
-        header += "vec4 gl_Color;";
-    }
-    header += "};";
-}
-
 } // Anonymous namespace
 
 EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile& profile_,
@@ -361,7 +324,6 @@ EmitContext::EmitContext(IR::Program& program, Bindings& bindings, const Profile
     }
     SetupOutPerVertex(*this, header);
     SetupInPerVertex(*this, header);
-    SetupLegacyInPerFragment(*this, header);
 
     for (size_t index = 0; index < IR::NUM_GENERICS; ++index) {
         if (!info.loads.Generic(index) || !runtime_info.previous_stage_stores.Generic(index)) {