From 3047eb66889a9782fadfbe479c33e6a8bfc5bf53 Mon Sep 17 00:00:00 2001
From: ameerj <52414509+ameerj@users.noreply.github.com>
Date: Sat, 29 May 2021 18:08:19 -0400
Subject: glsl: Implement TXQ and other misc changes

---
 src/shader_recompiler/backend/glsl/emit_glsl.cpp   |  2 +-
 .../backend/glsl/emit_glsl_context_get_set.cpp     |  3 +++
 .../backend/glsl/emit_glsl_image.cpp               | 24 +++++++++++++++++++++-
 .../backend/glsl/emit_glsl_not_implemented.cpp     |  2 +-
 src/shader_recompiler/backend/glsl/reg_alloc.cpp   | 11 +++++++---
 5 files changed, 36 insertions(+), 6 deletions(-)

diff --git a/src/shader_recompiler/backend/glsl/emit_glsl.cpp b/src/shader_recompiler/backend/glsl/emit_glsl.cpp
index 800de58b7..8705daeee 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_glsl.cpp
@@ -190,7 +190,7 @@ std::string EmitGLSL(const Profile& profile, const RuntimeInfo& runtime_info, IR
     }
     ctx.code.insert(0, ctx.header);
     ctx.code += "}";
-    fmt::print("\n{}\n", ctx.code);
+    // fmt::print("\n{}\n", ctx.code);
     return ctx.code;
 }
 
diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp b/src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp
index dc0e9ef95..ab7628a5a 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_context_get_set.cpp
@@ -118,6 +118,9 @@ void EmitGetAttribute(EmitContext& ctx, IR::Inst& inst, IR::Attribute attr,
     case IR::Attribute::VertexId:
         ctx.AddS32("{}=gl_VertexID;", inst);
         break;
+    case IR::Attribute::FrontFace:
+        ctx.AddS32("{}=gl_FrontFacing?-1:0;", inst);
+        break;
     default:
         fmt::print("Get attribute {}", attr);
         throw NotImplementedException("Get attribute {}", attr);
diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_image.cpp b/src/shader_recompiler/backend/glsl/emit_glsl_image.cpp
index e12d7b850..9213375b4 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl_image.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_image.cpp
@@ -351,7 +351,29 @@ void EmitImageFetch([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] IR::Inst
 void EmitImageQueryDimensions([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] IR::Inst& inst,
                               [[maybe_unused]] const IR::Value& index,
                               [[maybe_unused]] std::string_view lod) {
-    throw NotImplementedException("GLSL Instruction");
+    const auto info{inst.Flags<IR::TextureInstInfo>()};
+    const auto texture{Texture(ctx, info, index)};
+    switch (info.type) {
+    case TextureType::Color1D:
+        return ctx.AddU32x4(
+            "{}=uvec4(uint(textureSize({},int({}))),0u,0u,uint(textureQueryLevels({})));", inst,
+            texture, lod, texture);
+    case TextureType::ColorArray1D:
+    case TextureType::Color2D:
+    case TextureType::ColorCube:
+        return ctx.AddU32x4(
+            "{}=uvec4(uvec2(textureSize({},int({}))),0u,uint(textureQueryLevels({})));", inst,
+            texture, lod, texture);
+    case TextureType::ColorArray2D:
+    case TextureType::Color3D:
+    case TextureType::ColorArrayCube:
+        return ctx.AddU32x4(
+            "{}=uvec4(uvec3(textureSize({},int({}))),uint(textureQueryLevels({})));", inst, texture,
+            lod, texture);
+    case TextureType::Buffer:
+        throw NotImplementedException("Texture buffers");
+    }
+    throw LogicError("Unspecified image type {}", info.type.Value());
 }
 
 void EmitImageQueryLod([[maybe_unused]] EmitContext& ctx, [[maybe_unused]] IR::Inst& inst,
diff --git a/src/shader_recompiler/backend/glsl/emit_glsl_not_implemented.cpp b/src/shader_recompiler/backend/glsl/emit_glsl_not_implemented.cpp
index fd3140dd2..b8f95bd36 100644
--- a/src/shader_recompiler/backend/glsl/emit_glsl_not_implemented.cpp
+++ b/src/shader_recompiler/backend/glsl/emit_glsl_not_implemented.cpp
@@ -168,7 +168,7 @@ void EmitSetSampleMask(EmitContext& ctx, std::string_view value) {
 }
 
 void EmitSetFragDepth(EmitContext& ctx, std::string_view value) {
-    NotImplemented();
+    ctx.Add("gl_FragDepth={};", value);
 }
 
 void EmitGetZFlag(EmitContext& ctx) {
diff --git a/src/shader_recompiler/backend/glsl/reg_alloc.cpp b/src/shader_recompiler/backend/glsl/reg_alloc.cpp
index ecb550095..b1de022d4 100644
--- a/src/shader_recompiler/backend/glsl/reg_alloc.cpp
+++ b/src/shader_recompiler/backend/glsl/reg_alloc.cpp
@@ -37,9 +37,14 @@ std::string FormatFloat(std::string_view value, IR::Type type) {
             return "uintBitsToFloat(0xff800000)";
         }
     }
-    const bool needs_dot = value.find_first_of('.') == std::string_view::npos;
-    const bool needs_suffix = !value.ends_with('f');
-    const auto suffix = type == IR::Type::F32 ? "f" : "lf";
+    if (value.find_first_of('e') != std::string_view::npos) {
+        // scientific notation
+        const auto cast{type == IR::Type::F32 ? "float" : "double"};
+        return fmt::format("{}({})", cast, value);
+    }
+    const bool needs_dot{value.find_first_of('.') == std::string_view::npos};
+    const bool needs_suffix{!value.ends_with('f')};
+    const auto suffix{type == IR::Type::F32 ? "f" : "lf"};
     return fmt::format("{}{}{}", value, needs_dot ? "." : "", needs_suffix ? suffix : "");
 }
 
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