PostProcessing: Add ReShade .fx shader support

README.md

@@ -22,37 +22,37 @@ DuckStation features a fully-featured frontend built using Qt, as well as a full
 
 Other features include:
 
- - CPU Recompiler/JIT (x86-64, armv7/AArch32 and AArch64)
+ - CPU Recompiler/JIT (x86-64, armv7/AArch32 and AArch64).
- - Hardware (D3D11, D3D12, OpenGL, Vulkan, Metal) and software rendering
+ - Hardware (D3D11, D3D12, OpenGL, Vulkan, Metal) and software rendering.
- - Upscaling, texture filtering, and true colour (24-bit) in hardware renderers
+ - Upscaling, texture filtering, and true colour (24-bit) in hardware renderers.
- - PGXP for geometry precision, texture correction, and depth buffer emulation
+ - PGXP for geometry precision, texture correction, and depth buffer emulation.
- - Adaptive downsampling filter
+ - Adaptive downsampling filter.
- - Post processing shader chains
+ - Post processing shader chains (GLSL and experimental Reshade FX).
- - "Fast boot" for skipping BIOS splash/intro
+ - "Fast boot" for skipping BIOS splash/intro.
- - Save state support
+ - Save state support.
- - Windows, Linux, macOS support
+ - Windows, Linux, macOS support.
  - Supports bin/cue images, raw bin/img files, MAME CHD, single-track ECM, MDS/MDF, and unencrypted PBP formats.
- - Direct booting of homebrew executables
+ - Direct booting of homebrew executables.
- - Direct loading of Portable Sound Format (psf) files
+ - Direct loading of Portable Sound Format (psf) files.
- - Digital and analog controllers for input (rumble is forwarded to host)
+ - Digital and analog controllers for input (rumble is forwarded to host).
- - Namco GunCon lightgun support (simulated with mouse)
+ - Namco GunCon lightgun support (simulated with mouse).
- - NeGcon support
+ - NeGcon support.
- - Qt and "Big Picture" UI
+ - Qt and "Big Picture" UI.
- - Automatic updates for Windows builds
+ - Automatic updates for Windows builds.
- - Automatic content scanning - game titles/hashes are provided by redump.org
+ - Automatic content scanning - game titles/hashes are provided by redump.org.
- - Optional automatic switching of memory cards for each game
+ - Optional automatic switching of memory cards for each game.
- - Supports loading cheats from existing lists
+ - Supports loading cheats from existing lists.
- - Memory card editor and save importer
+ - Memory card editor and save importer.
- - Emulated CPU overclocking
+ - Emulated CPU overclocking.
- - Integrated and remote debugging
+ - Integrated and remote debugging.
- - Multitap controllers (up to 8 devices)
+ - Multitap controllers (up to 8 devices).
- - RetroAchievements
+ - RetroAchievements.
- - Automatic loading/applying of PPF patches
+ - Automatic loading/applying of PPF patches.
 
 ## System Requirements
  - A CPU faster than a potato. But it needs to be x86_64, AArch32/armv7, or AArch64/ARMv8, otherwise you won't get a recompiler and it'll be slow.
  - For the hardware renderers, a GPU capable of OpenGL 3.1/OpenGL ES 3.1/Direct3D 11 Feature Level 10.0 (or Vulkan 1.0) and above. So, basically anything made in the last 10 years or so.
- - SDL, XInput or DInput compatible game controller (e.g. XB360/XBOne). DualShock 3 users on Windows will need to install the official DualShock 3 drivers included as part of PlayStation Now.
+ - SDL, XInput or DInput compatible game controller (e.g. XB360/XBOne/XBSeries). DualShock 3 users on Windows will need to install the official DualShock 3 drivers included as part of PlayStation Now.
 
 ## Downloading and running
 Binaries of DuckStation for Windows x64/ARM64, Linux x86_64 (in AppImage format), and Android ARMv7/ARMv8 are available via GitHub Releases and are automatically built with every commit/push. Binaries or packages distributed through other sources may be out of date and are not supported by the developer, please speak to them for support, not us.

dep/CMakeLists.txt

@@ -16,6 +16,7 @@ add_subdirectory(soundtouch)
 add_subdirectory(googletest)
 add_subdirectory(cpuinfo)
 add_subdirectory(fast_float)
+add_subdirectory(reshadefx)
 
 if(ENABLE_CUBEB)
   add_subdirectory(cubeb)

dep/reshadefx/src/effect_codegen_hlsl.cpp

@@ -632,9 +632,9 @@ private:
 			const unsigned int texture_dimension = info.type.texture_dimension();
 			code += "Texture" + std::to_string(texture_dimension) + "D<";
 			write_texture_format(code, tex_info.format);
-			code += "> __"     + info.unique_name + "_t : register(t" + std::to_string(info.binding) + "); \n";
+			code += "> __"     + info.unique_name + "_t : register( t0); \n";
 
-			code += "SamplerState __" + info.unique_name + "_s : register(s" + std::to_string(info.binding) + ");\n";
+			code += "SamplerState __" + info.unique_name + "_s : register( s0);\n";
 
 			code += "static const ";
 			write_type(code, info.type);

src/util/CMakeLists.txt

@@ -52,6 +52,8 @@ add_library(util
   postprocessing.h
   postprocessing_shader.cpp
   postprocessing_shader.h
+  postprocessing_shader_fx.cpp
+  postprocessing_shader_fx.h
   postprocessing_shader_glsl.cpp
   postprocessing_shader_glsl.h
   shadergen.cpp
@@ -69,7 +71,7 @@ add_library(util
 target_include_directories(util PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/..")
 target_include_directories(util PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/..")
 target_link_libraries(util PUBLIC common simpleini imgui)
-target_link_libraries(util PRIVATE stb libchdr zlib soundtouch Zstd::Zstd)
+target_link_libraries(util PRIVATE stb libchdr zlib soundtouch Zstd::Zstd reshadefx)
 
 if(ENABLE_CUBEB)
   target_sources(util PRIVATE

src/util/postprocessing.cpp

@@ -6,6 +6,7 @@
 #include "host.h"
 #include "imgui_manager.h"
 #include "postprocessing_shader.h"
+#include "postprocessing_shader_fx.h"
 #include "postprocessing_shader_glsl.h"
 
 // TODO: Remove me
@@ -175,6 +176,32 @@ std::vector<std::pair<std::string, std::string>> PostProcessing::GetAvailableSha
     }
   }
 
+  FileSystem::FindFiles(Path::Combine(EmuFolders::Shaders, "reshade" FS_OSPATH_SEPARATOR_STR "Shaders").c_str(), "*.fx",
+                        FILESYSTEM_FIND_FILES | FILESYSTEM_FIND_RELATIVE_PATHS, &results);
+  FileSystem::FindFiles(
+    Path::Combine(EmuFolders::Resources, "shaders" FS_OSPATH_SEPARATOR_STR "reshade" FS_OSPATH_SEPARATOR_STR "Shaders")
+      .c_str(),
+    "*.fx", FILESYSTEM_FIND_FILES | FILESYSTEM_FIND_RELATIVE_PATHS | FILESYSTEM_FIND_KEEP_ARRAY, &results);
+  for (FILESYSTEM_FIND_DATA& fd : results)
+  {
+    size_t pos = fd.FileName.rfind('.');
+    if (pos != std::string::npos && pos > 0)
+      fd.FileName.erase(pos);
+
+    // swap any backslashes for forward slashes so the config is cross-platform
+    for (size_t i = 0; i < fd.FileName.size(); i++)
+    {
+      if (fd.FileName[i] == '\\')
+        fd.FileName[i] = '/';
+    }
+
+    if (std::none_of(names.begin(), names.end(), [&fd](const auto& other) { return fd.FileName == other.second; }))
+    {
+      std::string display_name = fmt::format(TRANSLATE_FS("PostProcessing", "{} [ReShade]"), fd.FileName);
+      names.emplace_back(std::move(display_name), std::move(fd.FileName));
+    }
+  }
+
   return names;
 }
 
@@ -333,7 +360,31 @@ void PostProcessing::SetEnabled(bool enabled)
 std::unique_ptr<PostProcessing::Shader> PostProcessing::TryLoadingShader(const std::string& shader_name,
                                                                          bool only_config, Error* error)
 {
-  std::string filename(Path::Combine(EmuFolders::Shaders, fmt::format("{}.glsl", shader_name)));
+  std::string filename;
+  std::optional<std::string> resource_str;
+
+  // Try reshade first.
+  filename = Path::Combine(
+    EmuFolders::Shaders,
+    fmt::format("reshade" FS_OSPATH_SEPARATOR_STR "Shaders" FS_OSPATH_SEPARATOR_STR "{}.fx", shader_name));
+
+  // TODO: Won't work on Android. Who cares? All the homies are tired of demanding Android users.
+  if (!FileSystem::FileExists(filename.c_str()))
+  {
+    filename = Path::Combine(EmuFolders::Resources,
+                             fmt::format("shaders" FS_OSPATH_SEPARATOR_STR "reshade" FS_OSPATH_SEPARATOR_STR
+                                         "Shaders" FS_OSPATH_SEPARATOR_STR "{}.fx",
+                                         shader_name));
+  }
+
+  if (FileSystem::FileExists(filename.c_str()))
+  {
+    std::unique_ptr<ReShadeFXShader> shader = std::make_unique<ReShadeFXShader>();
+    if (shader->LoadFromFile(std::string(shader_name), filename.c_str(), only_config, error))
+      return shader;
+  }
+
+  filename = Path::Combine(EmuFolders::Shaders, fmt::format("{}.glsl", shader_name));
   if (FileSystem::FileExists(filename.c_str()))
   {
     std::unique_ptr<GLSLShader> shader = std::make_unique<GLSLShader>();
@@ -341,8 +392,8 @@ std::unique_ptr<PostProcessing::Shader> PostProcessing::TryLoadingShader(const s
       return shader;
   }
 
-  std::optional<std::string> resource_str(
+  resource_str =
-    Host::ReadResourceFileToString(fmt::format("shaders" FS_OSPATH_SEPARATOR_STR "{}.glsl", shader_name).c_str()));
+    Host::ReadResourceFileToString(fmt::format("shaders" FS_OSPATH_SEPARATOR_STR "{}.glsl", shader_name).c_str());
   if (resource_str.has_value())
   {
     std::unique_ptr<GLSLShader> shader = std::make_unique<GLSLShader>();

src/util/postprocessing_shader_fx.h

@@ -0,0 +1,122 @@
+// SPDX-FileCopyrightText: 2019-2023 Connor McLaughlin <stenzek@gmail.com>
+// SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)
+
+#pragma once
+
+#include "postprocessing_shader.h"
+
+#include "common/timer.h"
+
+// reshadefx
+#include "effect_module.hpp"
+
+class Error;
+
+namespace PostProcessing {
+
+class ReShadeFXShader final : public Shader
+{
+public:
+  ReShadeFXShader();
+  ~ReShadeFXShader();
+
+  bool IsValid() const override;
+
+  bool LoadFromFile(std::string name, const char* filename, bool only_config, Error* error);
+
+  bool ResizeOutput(GPUTexture::Format format, u32 width, u32 height) override;
+  bool CompilePipeline(GPUTexture::Format format, u32 width, u32 height) override;
+  bool Apply(GPUTexture* input, GPUFramebuffer* final_target, s32 final_left, s32 final_top, s32 final_width,
+             s32 final_height, s32 orig_width, s32 orig_height, u32 target_width, u32 target_height) override;
+
+private:
+  using TextureID = s32;
+
+  static constexpr TextureID INPUT_COLOR_TEXTURE = -1;
+  static constexpr TextureID INPUT_DEPTH_TEXTURE = -2;
+  static constexpr TextureID OUTPUT_COLOR_TEXTURE = -3;
+
+  enum class SourceOptionType
+  {
+    None,
+    Zero,
+    Timer,
+    FrameTime,
+    FrameCount,
+    FrameCountF,
+    PingPong,
+    MousePoint,
+    BufferWidth,
+    BufferHeight,
+    BufferWidthF,
+    BufferHeightF,
+    InternalWidth,
+    InternalHeight,
+    InternalWidthF,
+    InternalHeightF,
+
+    MaxCount
+  };
+
+  struct SourceOption
+  {
+    SourceOptionType source;
+    u32 offset;
+    float min;
+    float max;
+    float smoothing;
+    std::array<float, 2> step;
+    ShaderOption::ValueVector value;
+  };
+
+  bool CreateModule(s32 buffer_width, s32 buffer_height, reshadefx::module* mod, Error* error);
+  bool CreateOptions(const reshadefx::module& mod, Error* error);
+  bool GetSourceOption(const reshadefx::uniform_info& ui, SourceOptionType* si, Error* error);
+  bool CreatePasses(GPUTexture::Format backbuffer_format, reshadefx::module& mod, Error* error);
+
+  const char* GetTextureNameForID(TextureID id) const;
+  GPUTexture* GetTextureByID(TextureID id, GPUTexture* input, GPUFramebuffer* final_target) const;
+  GPUFramebuffer* GetFramebufferByID(TextureID id, GPUTexture* input, GPUFramebuffer* final_target) const;
+
+  std::string m_filename;
+
+  struct Texture
+  {
+    std::unique_ptr<GPUTexture> texture;
+    std::unique_ptr<GPUFramebuffer> framebuffer;
+    std::string reshade_name; // TODO: we might be able to drop this
+    GPUTexture::Format format;
+    float rt_scale;
+  };
+
+  struct Sampler
+  {
+    u32 slot;
+    TextureID texture_id;
+    std::string reshade_name;
+    GPUSampler* sampler;
+  };
+
+  struct Pass
+  {
+    std::unique_ptr<GPUPipeline> pipeline;
+    TextureID render_target;
+    std::vector<Sampler> samplers;
+    u32 num_vertices;
+
+#ifdef _DEBUG
+    std::string name;
+#endif
+  };
+
+  std::vector<Pass> m_passes;
+  std::vector<Texture> m_textures;
+  std::vector<SourceOption> m_source_options;
+  u32 m_uniforms_size = 0;
+  bool m_valid = false;
+
+  Common::Timer m_frame_timer;
+  u32 m_frame_count = 0;
+};
+
+} // namespace PostProcessing

src/util/util.vcxproj

@@ -64,6 +64,7 @@
     <ClInclude Include="platform_misc.h" />
     <ClInclude Include="postprocessing.h" />
     <ClInclude Include="postprocessing_shader.h" />
+    <ClInclude Include="postprocessing_shader_fx.h" />
     <ClInclude Include="postprocessing_shader_glsl.h" />
     <ClInclude Include="sdl_input_source.h" />
     <ClInclude Include="shadergen.h" />
@@ -164,6 +165,7 @@
     <ClCompile Include="platform_misc_win32.cpp" />
     <ClCompile Include="postprocessing.cpp" />
     <ClCompile Include="postprocessing_shader.cpp" />
+    <ClCompile Include="postprocessing_shader_fx.cpp" />
     <ClCompile Include="postprocessing_shader_glsl.cpp" />
     <ClCompile Include="sdl_input_source.cpp" />
     <ClCompile Include="shadergen.cpp" />
@@ -215,6 +217,9 @@
     <ProjectReference Include="..\..\dep\libchdr\libchdr.vcxproj">
       <Project>{425d6c99-d1c8-43c2-b8ac-4d7b1d941017}</Project>
     </ProjectReference>
+    <ProjectReference Include="..\..\dep\reshadefx\reshadefx.vcxproj">
+      <Project>{27b8d4bb-4f01-4432-bc14-9bf6ca458eee}</Project>
+    </ProjectReference>
     <ProjectReference Include="..\..\dep\soundtouch\soundtouch.vcxproj">
       <Project>{751d9f62-881c-454e-bce8-cb9cf5f1d22f}</Project>
     </ProjectReference>
@@ -238,6 +243,7 @@
   <Import Project="util.props" />
   <ItemDefinitionGroup>
     <ClCompile>
+      <AdditionalIncludeDirectories>%(AdditionalIncludeDirectories);$(SolutionDir)dep\reshadefx\include</AdditionalIncludeDirectories>
       <ObjectFileName>$(IntDir)/%(RelativeDir)/</ObjectFileName>
     </ClCompile>
   </ItemDefinitionGroup>

src/util/util.vcxproj.filters

@@ -69,6 +69,7 @@
     <ClInclude Include="d3d11_stream_buffer.h" />
     <ClInclude Include="d3d11_texture.h" />
     <ClInclude Include="host.h" />
+    <ClInclude Include="postprocessing_shader_fx.h" />
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="jit_code_buffer.cpp" />
@@ -144,6 +145,7 @@
     <ClCompile Include="d3d11_stream_buffer.cpp" />
     <ClCompile Include="d3d11_texture.cpp" />
     <ClCompile Include="host.cpp" />
+    <ClCompile Include="postprocessing_shader_fx.cpp" />
   </ItemGroup>
   <ItemGroup>
     <Filter Include="gl">