From 2b48cfd44b9923d887314ca2ce8ad09240a997b2 Mon Sep 17 00:00:00 2001
From: FernandoS27 <fsahmkow27@gmail.com>
Date: Tue, 11 Sep 2018 12:08:06 -0400
Subject: [PATCH] Replace old FragmentHeader for the new Header

---
 src/video_core/engines/shader_header.h        | 24 +++++++++++-------
 .../renderer_opengl/gl_shader_decompiler.cpp  | 25 +++----------------
 2 files changed, 18 insertions(+), 31 deletions(-)

diff --git a/src/video_core/engines/shader_header.h b/src/video_core/engines/shader_header.h
index 4663377ede..a885ee3cf0 100644
--- a/src/video_core/engines/shader_header.h
+++ b/src/video_core/engines/shader_header.h
@@ -5,8 +5,8 @@
 #pragma once
 
 #include "common/bit_field.h"
-#include "common/common_types.h"
 #include "common/common_funcs.h"
+#include "common/common_types.h"
 
 namespace Tegra::Shader {
 
@@ -72,7 +72,7 @@ struct Header {
             INSERT_PADDING_BYTES(2);  // OmapSystemValuesC
             INSERT_PADDING_BYTES(5);  // OmapFixedFncTexture[10]
             INSERT_PADDING_BYTES(1);  // OmapReserved
-        } ps;
+        } vtg;
 
         struct {
             INSERT_PADDING_BYTES(3);  // ImapSystemValuesA
@@ -82,14 +82,20 @@ struct Header {
             INSERT_PADDING_BYTES(2);  // ImapSystemValuesC
             INSERT_PADDING_BYTES(10); // ImapFixedFncTexture[10]
             INSERT_PADDING_BYTES(2);  // ImapReserved
-            INSERT_PADDING_BYTES(4);  // OmapTarget[8]
-            union {
-                BitField<0, 1, u32> omap_sample_mask;
-                BitField<1, 1, u32> omap_depth;
-                BitField<2, 30, u32> omap_reserved;
+            struct {
+                u32 target;
+                union {
+                    BitField<0, 1, u32> sample_mask;
+                    BitField<1, 1, u32> depth;
+                    BitField<2, 30, u32> reserved;
+                };
             } omap;
-        } vtg;
-    } sph;
+            bool IsColorComponentOutputEnabled(u32 render_target, u32 component) const {
+                const u32 bit = render_target * 4 + component;
+                return omap.target & (1 << bit);
+            }
+        } ps;
+    };
 };
 
 static_assert(sizeof(Header) == 0x50, "Incorrect structure size");
diff --git a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
index d826d98eb5..434faf9d4b 100644
--- a/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
+++ b/src/video_core/renderer_opengl/gl_shader_decompiler.cpp
@@ -689,23 +689,6 @@ public:
     }
 
 private:
-    // Shader program header for a Fragment Shader.
-    struct FragmentHeader {
-        INSERT_PADDING_WORDS(5);
-        INSERT_PADDING_WORDS(13);
-        u32 enabled_color_outputs;
-        union {
-            BitField<0, 1, u32> writes_samplemask;
-            BitField<1, 1, u32> writes_depth;
-        };
-
-        bool IsColorComponentOutputEnabled(u32 render_target, u32 component) const {
-            const u32 bit = render_target * 4 + component;
-            return enabled_color_outputs & (1 << bit);
-        }
-    };
-    static_assert(sizeof(FragmentHeader) == PROGRAM_HEADER_SIZE, "FragmentHeader size is wrong");
-
     /// Gets the Subroutine object corresponding to the specified address.
     const Subroutine& GetSubroutine(u32 begin, u32 end) const {
         const auto iter = subroutines.find(Subroutine{begin, end, suffix});
@@ -1011,10 +994,8 @@ private:
     /// Writes the output values from a fragment shader to the corresponding GLSL output variables.
     void EmitFragmentOutputsWrite() {
         ASSERT(stage == Maxwell3D::Regs::ShaderStage::Fragment);
-        FragmentHeader header;
-        std::memcpy(&header, program_code.data(), PROGRAM_HEADER_SIZE);
 
-        ASSERT_MSG(header.writes_samplemask == 0, "Samplemask write is unimplemented");
+        ASSERT_MSG(header.ps.omap.sample_mask == 0, "Samplemask write is unimplemented");
 
         // Write the color outputs using the data in the shader registers, disabled
         // rendertargets/components are skipped in the register assignment.
@@ -1023,7 +1004,7 @@ private:
              ++render_target) {
             // TODO(Subv): Figure out how dual-source blending is configured in the Switch.
             for (u32 component = 0; component < 4; ++component) {
-                if (header.IsColorComponentOutputEnabled(render_target, component)) {
+                if (header.ps.IsColorComponentOutputEnabled(render_target, component)) {
                     shader.AddLine(fmt::format("FragColor{}[{}] = {};", render_target, component,
                                                regs.GetRegisterAsFloat(current_reg)));
                     ++current_reg;
@@ -1031,7 +1012,7 @@ private:
             }
         }
 
-        if (header.writes_depth) {
+        if (header.ps.omap.depth) {
             // The depth output is always 2 registers after the last color output, and current_reg
             // already contains one past the last color register.