Revert "vulkan/slang: Allow a cache for spv."

This reverts commit db554aa8cd62f083b93d4b2e7147c5d2500366d9.

gtk/src/gtk_config.cpp

@@ -22,26 +22,6 @@
 
 namespace fs = std::filesystem;
 
-std::string get_cache_dir()
-{
-    char *env_home = getenv("HOME");
-    char *env_cache = getenv("XDG_CACHE_HOME");
-
-    std::string dir;
-
-    if (env_cache)
-        dir = std::string(env_cache) + "/snes9x";
-
-    else if (env_home)
-        dir = std::string(env_home) + "/.cache/snes9x";
-
-    if (dir.empty())
-        return dir;
-
-    fs::create_directories(dir);
-    return dir;
-}
-
 std::string get_config_dir()
 {
     // Find config directory

gtk/src/gtk_config.h

@@ -159,7 +159,6 @@ class Snes9xConfig
     int joystick_threshold;
 };
 
-std::string get_cache_dir();
 std::string get_config_dir();
 std::string get_config_file_name();
 

gtk/src/gtk_display_driver_vulkan.cpp

@@ -84,7 +84,7 @@ int S9xVulkanDisplayDriver::init()
     if (!gui_config->shader_filename.empty() && gui_config->use_shaders)
     {
         shaderchain = std::make_unique<Vulkan::ShaderChain>(context.get());
-        if (!shaderchain->load_shader_preset(gui_config->shader_filename, get_cache_dir()))
+        if (!shaderchain->load_shader_preset(gui_config->shader_filename))
         {
             fmt::print("Couldn't load shader preset file\n");
             shaderchain = nullptr;
@@ -94,8 +94,6 @@ int S9xVulkanDisplayDriver::init()
             window->enable_widget("shader_parameters_item", true);
             return 0;
         }
-
-
     }
 
     simple_output = std::make_unique<Vulkan::SimpleOutput>(context.get(), vk::Format::eR5G6B5UnormPack16);

vulkan/slang_preset.cpp

@@ -107,10 +107,6 @@ bool SlangPreset::load_preset_file(string filename)
         }
     }
 
-    if (!cache_directory.empty())
-        for (auto &p : passes)
-            p.set_cache_directory(cache_directory);
-
     std::vector<std::future<bool>> futures;
     for (size_t i = 0; i < passes.size(); i++)
     {
@@ -139,11 +135,6 @@ bool SlangPreset::load_preset_file(string filename)
     return true;
 }
 
-void SlangPreset::set_cache_directory(std::string filename)
-{
-    cache_directory = filename;
-}
-
 /*
     Aggregates the parameters from individual stages and separate shader files,
     resolving duplicates.

vulkan/slang_preset.hpp

@@ -18,7 +18,6 @@ struct SlangPreset
     bool match_sampler_semantic(const std::string &name, int pass, SlangShader::Sampler::Type &type, int &specifier);
     void gather_parameters();
     bool save_to_file(std::string filename);
-    void set_cache_directory(std::string filename);
 
     struct Texture
     {
@@ -35,5 +34,4 @@ struct SlangPreset
     int oldest_previous_frame;
     bool uses_feedback;
     bool last_pass_uses_feedback;
-    std::string cache_directory;
 };

vulkan/slang_shader.cpp

@@ -10,8 +10,6 @@
 #include "../external/glslang/glslang/Public/ShaderLang.h"
 #include "../external/glslang/SPIRV/GlslangToSpv.h"
 #include "../external/glslang/StandAlone/ResourceLimits.h"
-#include "../external/xxh64/xxh64.hpp"
-#include <filesystem>
 
 using std::string;
 using std::vector;
@@ -25,11 +23,6 @@ SlangShader::~SlangShader()
 {
 }
 
-void SlangShader::set_cache_directory(std::string dir)
-{
-    cache_directory = dir;
-}
-
 /*
     Recursively load shader file and included files into memory, applying
     #include and #pragma directives. Will strip all directives except
@@ -238,76 +231,44 @@ std::vector<uint32_t> SlangShader::generate_spirv(std::string shader_string, std
 
 }
 
-std::string SlangShader::get_hash_filename(const std::string &shader_string)
-{
-    uint64_t hash = xxh64::hash(shader_string.c_str(), fragment_shader_string.size(), 56);
-    char hash_hex_string[32];
-    snprintf(hash_hex_string, 32, "%016lx.spv", hash);
-    auto cache_path = std::filesystem::path(cache_directory);
-    cache_path /= hash_hex_string;
-
-    return cache_path.string();
-}
-
-static const char *header = "SPVCACHE1";
-static size_t header_size = 9;
-
-bool SlangShader::load_cache(std::string hash_filename, std::vector<uint32_t> &output)
-{
-    if (cache_directory.empty())
-        return false;
-    if (!std::filesystem::exists(hash_filename))
-        return false;
-    auto size = std::filesystem::file_size(hash_filename);
-    size -= header_size;
-    if ((size & 3) != 0)
-        return false;
-
-    std::ifstream file(hash_filename, std::ios::binary);
-    char headerblock[header_size];
-    file.read(headerblock, header_size);
-    if (memcmp(headerblock, header, header_size))
-    {
-        printf("Invalid cache file format %s.\n", headerblock);
-        return false;
-    }
-
-    output.resize(size / 4);
-    file.read((char *)output.data(), size);
-
-    return true;
-}
-
-void SlangShader::save_cache(std::string hash_filename, std::vector<uint32_t> &spv)
-{
-    if (cache_directory.empty())
-        return;
-    std::ofstream file(hash_filename, std::ios::binary);
-    file.write(header, header_size);
-    file.write((char *)spv.data(), spv.size() * 4);
-}
-
 /*
     Generate SPIRV from separate preprocessed fragment and vertex shaders.
     Must have called divide_into_stages beforehand. Returns true on success.
 */
 bool SlangShader::generate_spirv()
 {
-    fragment_shader_spirv.clear();
-    vertex_shader_spirv.clear();
+    Initializeglslang();
 
-    auto vertex_cache_filename = get_hash_filename(vertex_shader_string);
-    auto fragment_cache_filename = get_hash_filename(fragment_shader_string);
+    const EShMessages messages = (EShMessages)(EShMsgDefault | EShMsgVulkanRules | EShMsgSpvRules | EShMsgDebugInfo | EShMsgAST | EShMsgEnhanced);
+    auto forbid_includer = glslang::TShader::ForbidIncluder();
 
-    if (load_cache(vertex_cache_filename, vertex_shader_spirv))
-        if (load_cache(fragment_cache_filename, fragment_shader_spirv))
-            return true;
+    glslang::TShader vertexTShader(EShLangVertex);
+    glslang::TShader fragmentTShader(EShLangFragment);
 
-    vertex_shader_spirv = generate_spirv(vertex_shader_string, "vertex");
-    fragment_shader_spirv = generate_spirv(fragment_shader_string, "fragment");
+    auto compile = [&](glslang::TShader &shader, string &shader_string, std::vector<uint32_t> &spirv) -> bool {
+        const char *source = shader_string.c_str();
+        shader.setStrings(&source, 1);
+        if (!shader.parse(&glslang::DefaultTBuiltInResource, 450, false, messages, forbid_includer))
+            return false;
 
-    save_cache(vertex_cache_filename, vertex_shader_spirv);
-    save_cache(fragment_cache_filename, fragment_shader_spirv);
+        glslang::TProgram program;
+        program.addShader(&shader);
+        if (!program.link(messages))
+            return false;
 
+        glslang::GlslangToSpv(*program.getIntermediate(shader.getStage()), spirv);
+        return true;
+    };
+
+    if (!compile(vertexTShader, vertex_shader_string, vertex_shader_spirv))
+    {
+        printf("%s\n%s\n", vertexTShader.getInfoLog(), vertexTShader.getInfoDebugLog());
+        return false;
+    }
+    if (!compile(fragmentTShader, fragment_shader_string, fragment_shader_spirv))
+    {
+        printf("%s\n%s\n", fragmentTShader.getInfoLog(), fragmentTShader.getInfoDebugLog());
+        return false;
+    }
     return true;
 }

vulkan/slang_shader.hpp

@@ -72,10 +72,6 @@ struct SlangShader
     bool load_file(std::string new_filename = "");
     void divide_into_stages(const std::vector<std::string> &lines);
     bool generate_spirv();
-    std::string get_hash_filename(const std::string &shader_string);
-    bool load_cache(std::string hash_filename, std::vector<uint32_t> &output);
-    void save_cache(std::string hash_filename, std::vector<uint32_t> &spv);
-    void set_cache_directory(std::string dir);
     static std::vector<uint32_t> generate_spirv(std::string shader_string, std::string stage);
 
     std::string filename;
@@ -104,5 +100,4 @@ struct SlangShader
     int ubo_binding;
     std::vector<Uniform> uniforms;
     std::vector<Sampler> samplers;
-    std::string cache_directory;
 };

vulkan/vulkan_shader_chain.cpp

@@ -187,16 +187,13 @@ void ShaderChain::update_and_propagate_sizes(int original_width_new, int origina
     }
 }
 
-bool ShaderChain::load_shader_preset(std::string filename, std::string cache_dir)
+bool ShaderChain::load_shader_preset(std::string filename)
 {
     if (!ends_with(filename, ".slangp"))
         printf("Warning: loading preset without .slangp extension\n");
 
     preset = std::make_unique<SlangPreset>();
 
-    if (!cache_dir.empty())
-        preset->set_cache_directory(cache_dir);
-
     if (!preset->load_preset_file(filename))
     {
         printf("Couldn't load preset file: %s\n", filename.c_str());

vulkan/vulkan_shader_chain.hpp

@@ -16,7 +16,7 @@ class ShaderChain
 
     ShaderChain(Context *context_);
     ~ShaderChain();
-    bool load_shader_preset(std::string filename, std::string cache_dir = "");
+    bool load_shader_preset(std::string filename);
     void update_and_propagate_sizes(int original_width_, int original_height_, int viewport_width_, int viewport_height_);
     bool load_lookup_textures();
     void do_frame(uint8_t *data, int width, int height, int stride, vk::Format format, int viewport_x, int viewport_y, int viewport_width, int viewport_height);