From 10953495c1b7de412312b64370d99a2294dfe6a2 Mon Sep 17 00:00:00 2001
From: bunnei <bunneidev@gmail.com>
Date: Sat, 7 Apr 2018 04:51:42 -0400
Subject: gl_shader_gen: Add hashable setup/config structs.

---
 src/video_core/renderer_opengl/gl_shader_gen.h | 75 ++++++++++++++++----------
 1 file changed, 48 insertions(+), 27 deletions(-)

(limited to 'src/video_core/renderer_opengl/gl_shader_gen.h')

diff --git a/src/video_core/renderer_opengl/gl_shader_gen.h b/src/video_core/renderer_opengl/gl_shader_gen.h
index 5101e7d30..925e66ee4 100644
--- a/src/video_core/renderer_opengl/gl_shader_gen.h
+++ b/src/video_core/renderer_opengl/gl_shader_gen.h
@@ -4,46 +4,67 @@
 
 #pragma once
 
-#include <cstring>
+#include <array>
 #include <string>
 #include <type_traits>
+#include "common/common_types.h"
 #include "common/hash.h"
 
 namespace GLShader {
 
-enum Attributes {
-    ATTRIBUTE_POSITION,
-    ATTRIBUTE_COLOR,
-    ATTRIBUTE_TEXCOORD0,
-    ATTRIBUTE_TEXCOORD1,
-    ATTRIBUTE_TEXCOORD2,
-    ATTRIBUTE_TEXCOORD0_W,
-    ATTRIBUTE_NORMQUAT,
-    ATTRIBUTE_VIEW,
-};
+constexpr size_t MAX_PROGRAM_CODE_LENGTH{0x1000};
 
-struct MaxwellShaderConfigCommon {
-    explicit MaxwellShaderConfigCommon(){};
+using ProgramCode = std::array<u64, MAX_PROGRAM_CODE_LENGTH>;
+
+struct ShaderSetup {
+    ShaderSetup(ProgramCode&& program_code) : program_code(std::move(program_code)) {}
+
+    ProgramCode program_code;
+    bool program_code_hash_dirty = true;
+
+    u64 GetProgramCodeHash() {
+        if (program_code_hash_dirty) {
+            program_code_hash = Common::ComputeHash64(&program_code, sizeof(program_code));
+            program_code_hash_dirty = false;
+        }
+        return program_code_hash;
+    }
+
+private:
+    u64 program_code_hash{};
 };
 
-struct MaxwellVSConfig : MaxwellShaderConfigCommon {
-    explicit MaxwellVSConfig() : MaxwellShaderConfigCommon() {}
+struct MaxwellShaderConfigCommon {
+    void Init(ShaderSetup& setup) {
+        program_hash = setup.GetProgramCodeHash();
+    }
 
-    bool operator==(const MaxwellVSConfig& o) const {
-        return std::memcmp(this, &o, sizeof(MaxwellVSConfig)) == 0;
-    };
+    u64 program_hash;
 };
 
-struct MaxwellFSConfig : MaxwellShaderConfigCommon {
-    explicit MaxwellFSConfig() : MaxwellShaderConfigCommon() {}
+struct MaxwellVSConfig : Common::HashableStruct<MaxwellShaderConfigCommon> {
+    explicit MaxwellVSConfig(ShaderSetup& setup) {
+        state.Init(setup);
+    }
+};
 
-    bool operator==(const MaxwellFSConfig& o) const {
-        return std::memcmp(this, &o, sizeof(MaxwellFSConfig)) == 0;
-    };
+struct MaxwellFSConfig : Common::HashableStruct<MaxwellShaderConfigCommon> {
+    explicit MaxwellFSConfig(ShaderSetup& setup) {
+        state.Init(setup);
+    }
 };
 
-std::string GenerateVertexShader(const MaxwellVSConfig& config);
-std::string GenerateFragmentShader(const MaxwellFSConfig& config);
+/**
+ * Generates the GLSL vertex shader program source code for the given VS program
+ * @returns String of the shader source code
+ */
+std::string GenerateVertexShader(const ShaderSetup& setup, const MaxwellVSConfig& config);
+
+/**
+ * Generates the GLSL fragment shader program source code for the given FS program
+ * @returns String of the shader source code
+ */
+std::string GenerateFragmentShader(const ShaderSetup& setup, const MaxwellFSConfig& config);
 
 } // namespace GLShader
 
@@ -52,14 +73,14 @@ namespace std {
 template <>
 struct hash<GLShader::MaxwellVSConfig> {
     size_t operator()(const GLShader::MaxwellVSConfig& k) const {
-        return Common::ComputeHash64(&k, sizeof(GLShader::MaxwellVSConfig));
+        return k.Hash();
     }
 };
 
 template <>
 struct hash<GLShader::MaxwellFSConfig> {
     size_t operator()(const GLShader::MaxwellFSConfig& k) const {
-        return Common::ComputeHash64(&k, sizeof(GLShader::MaxwellFSConfig));
+        return k.Hash();
     }
 };
 
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