1 files changed, 406 insertions, 0 deletions
diff --git a/Source/Core/VideoCommon/GraphicsModSystem/Runtime/CustomPipeline.cpp b/Source/Core/VideoCommon/GraphicsModSystem/Runtime/CustomPipeline.cpp
new file mode 100644
index 0000000000..d6144adea3
--- /dev/null
+++ b/Source/Core/VideoCommon/GraphicsModSystem/Runtime/CustomPipeline.cpp
@@ -0,0 +1,406 @@
+// Copyright 2024 Dolphin Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include "VideoCommon/GraphicsModSystem/Runtime/CustomPipeline.h"
+
+#include <algorithm>
+#include <array>
+#include <variant>
+
+#include "Common/Logging/Log.h"
+#include "Common/VariantUtil.h"
+
+#include "VideoCommon/AbstractGfx.h"
+#include "VideoCommon/Assets/CustomAssetLoader.h"
+
+namespace
+{
+bool IsQualifier(std::string_view value)
+{
+  static std::array<std::string_view, 7> qualifiers = {"attribute", "const",   "highp",  "lowp",
+                                                       "mediump",   "uniform", "varying"};
+  return std::find(qualifiers.begin(), qualifiers.end(), value) != qualifiers.end();
+}
+
+bool IsBuiltInMacro(std::string_view value)
+{
+  static std::array<std::string_view, 5> built_in = {"__LINE__", "__FILE__", "__VERSION__",
+                                                     "GL_core_profile", "GL_compatibility_profile"};
+  return std::find(built_in.begin(), built_in.end(), value) != built_in.end();
+}
+
+std::vector<std::string> GlobalConflicts(std::string_view source)
+{
+  std::string_view last_identifier = "";
+  std::vector<std::string> global_result;
+  u32 scope = 0;
+  for (u32 i = 0; i < source.size(); i++)
+  {
+    // If we're out of global scope, we don't care
+    // about any of the details
+    if (scope > 0)
+    {
+      if (source[i] == '{')
+      {
+        scope++;
+      }
+      else if (source[i] == '}')
+      {
+        scope--;
+      }
+      continue;
+    }
+
+    const auto parse_identifier = [&]() {
+      const u32 start = i;
+      for (; i < source.size(); i++)
+      {
+        if (!Common::IsAlpha(source[i]) && source[i] != '_' && !std::isdigit(source[i]))
+          break;
+      }
+      u32 end = i;
+      i--;  // unwind
+      return source.substr(start, end - start);
+    };
+
+    if (Common::IsAlpha(source[i]) || source[i] == '_')
+    {
+      const std::string_view identifier = parse_identifier();
+      if (IsQualifier(identifier))
+        continue;
+      if (IsBuiltInMacro(identifier))
+        continue;
+      last_identifier = identifier;
+    }
+    else if (source[i] == '#')
+    {
+      const auto parse_until_end_of_preprocessor = [&]() {
+        bool continue_until_next_newline = false;
+        for (; i < source.size(); i++)
+        {
+          if (source[i] == '\n')
+          {
+            if (continue_until_next_newline)
+              continue_until_next_newline = false;
+            else
+              break;
+          }
+          else if (source[i] == '\\')
+          {
+            continue_until_next_newline = true;
+          }
+        }
+      };
+      i++;
+      const std::string_view identifier = parse_identifier();
+      if (identifier == "define")
+      {
+        i++;
+        // skip whitespace
+        while (source[i] == ' ')
+        {
+          i++;
+        }
+        global_result.push_back(std::string{parse_identifier()});
+        parse_until_end_of_preprocessor();
+      }
+      else
+      {
+        parse_until_end_of_preprocessor();
+      }
+    }
+    else if (source[i] == '{')
+    {
+      scope++;
+    }
+    else if (source[i] == '(')
+    {
+      // Unlikely the user will be using layouts but...
+      if (last_identifier == "layout")
+        continue;
+
+      // Since we handle equality, we can assume the identifier
+      // before '(' is a function definition
+      global_result.push_back(std::string{last_identifier});
+    }
+    else if (source[i] == '=')
+    {
+      global_result.push_back(std::string{last_identifier});
+      i++;
+      for (; i < source.size(); i++)
+      {
+        if (source[i] == ';')
+          break;
+      }
+    }
+    else if (source[i] == '/')
+    {
+      if ((i + 1) >= source.size())
+        continue;
+
+      if (source[i + 1] == '/')
+      {
+        // Go to end of line...
+        for (; i < source.size(); i++)
+        {
+          if (source[i] == '\n')
+            break;
+        }
+      }
+      else if (source[i + 1] == '*')
+      {
+        // Multiline, look for first '*/'
+        for (; i < source.size(); i++)
+        {
+          if (source[i] == '/' && source[i - 1] == '*')
+            break;
+        }
+      }
+    }
+  }
+
+  // Sort the conflicts from largest to smallest string
+  // this way we can ensure smaller strings that are a substring
+  // of the larger string are able to be replaced appropriately
+  std::sort(global_result.begin(), global_result.end(),
+            [](const std::string& first, const std::string& second) {
+              return first.size() > second.size();
+            });
+  return global_result;
+}
+
+}  // namespace
+
+void CustomPipeline::UpdatePixelData(
+    VideoCommon::CustomAssetLoader& loader,
+    std::shared_ptr<VideoCommon::CustomAssetLibrary> library, std::span<const u32> texture_units,
+    const VideoCommon::CustomAssetLibrary::AssetID& material_to_load)
+{
+  if (!m_pixel_material.m_asset || material_to_load != m_pixel_material.m_asset->GetAssetId())
+  {
+    m_pixel_material.m_asset = loader.LoadMaterial(material_to_load, library);
+  }
+
+  const auto material_data = m_pixel_material.m_asset->GetData();
+  if (!material_data)
+  {
+    return;
+  }
+
+  std::size_t max_material_data_size = 0;
+  if (m_pixel_material.m_asset->GetLastLoadedTime() > m_pixel_material.m_cached_write_time)
+  {
+    m_last_generated_material_code = ShaderCode{};
+    m_pixel_material.m_cached_write_time = m_pixel_material.m_asset->GetLastLoadedTime();
+    std::size_t texture_count = 0;
+    for (const auto& property : material_data->properties)
+    {
+      max_material_data_size += VideoCommon::MaterialProperty::GetMemorySize(property);
+      VideoCommon::MaterialProperty::WriteAsShaderCode(m_last_generated_material_code, property);
+      if (auto* texture_asset_id =
+              std::get_if<VideoCommon::CustomAssetLibrary::AssetID>(&property.m_value))
+      {
+        texture_count++;
+      }
+    }
+    m_material_data.resize(max_material_data_size);
+    m_game_textures.resize(texture_count);
+  }
+
+  if (!m_pixel_shader.m_asset ||
+      m_pixel_shader.m_asset->GetLastLoadedTime() > m_pixel_shader.m_cached_write_time ||
+      material_data->shader_asset != m_pixel_shader.m_asset->GetAssetId())
+  {
+    m_pixel_shader.m_asset = loader.LoadPixelShader(material_data->shader_asset, library);
+    m_pixel_shader.m_cached_write_time = m_pixel_shader.m_asset->GetLastLoadedTime();
+
+    m_last_generated_shader_code = ShaderCode{};
+  }
+
+  const auto shader_data = m_pixel_shader.m_asset->GetData();
+  if (!shader_data)
+  {
+    return;
+  }
+
+  if (shader_data->m_properties.size() != material_data->properties.size())
+  {
+    return;
+  }
+
+  u8* material_buffer = m_material_data.data();
+  u32 sampler_index = 8;
+  for (std::size_t index = 0; index < material_data->properties.size(); index++)
+  {
+    auto& property = material_data->properties[index];
+    const auto shader_it = shader_data->m_properties.find(property.m_code_name);
+    if (shader_it == shader_data->m_properties.end())
+    {
+      ERROR_LOG_FMT(VIDEO,
+                    "Custom pipeline, has material asset '{}' that uses a "
+                    "code name of '{}' but that can't be found on shader asset '{}'!",
+                    m_pixel_material.m_asset->GetAssetId(), property.m_code_name,
+                    m_pixel_shader.m_asset->GetAssetId());
+      return;
+    }
+
+    if (auto* texture_asset_id =
+            std::get_if<VideoCommon::CustomAssetLibrary::AssetID>(&property.m_value))
+    {
+      if (*texture_asset_id != "")
+      {
+        auto asset = loader.LoadGameTexture(*texture_asset_id, library);
+        if (!asset)
+        {
+          return;
+        }
+
+        auto& texture_asset = m_game_textures[index];
+        if (!texture_asset ||
+            texture_asset->m_cached_asset.m_asset->GetLastLoadedTime() >
+                texture_asset->m_cached_asset.m_cached_write_time ||
+            *texture_asset_id != texture_asset->m_cached_asset.m_asset->GetAssetId())
+        {
+          if (!texture_asset)
+          {
+            texture_asset = CachedTextureAsset{};
+          }
+          const auto loaded_time = asset->GetLastLoadedTime();
+          texture_asset->m_cached_asset = VideoCommon::CachedAsset<VideoCommon::GameTextureAsset>{
+              std::move(asset), loaded_time};
+          texture_asset->m_texture.reset();
+
+          if (std::holds_alternative<VideoCommon::ShaderProperty::Sampler2D>(
+                  shader_it->second.m_default))
+          {
+            texture_asset->m_sampler_code =
+                fmt::format("SAMPLER_BINDING({}) uniform sampler2D samp_{};\n", sampler_index,
+                            property.m_code_name);
+            texture_asset->m_define_code = fmt::format("#define HAS_{} 1\n", property.m_code_name);
+          }
+          else if (std::holds_alternative<VideoCommon::ShaderProperty::Sampler2DArray>(
+                       shader_it->second.m_default))
+          {
+            texture_asset->m_sampler_code =
+                fmt::format("SAMPLER_BINDING({}) uniform sampler2DArray samp_{};\n", sampler_index,
+                            property.m_code_name);
+            texture_asset->m_define_code = fmt::format("#define HAS_{} 1\n", property.m_code_name);
+          }
+          else if (std::holds_alternative<VideoCommon::ShaderProperty::SamplerCube>(
+                       shader_it->second.m_default))
+          {
+            texture_asset->m_sampler_code =
+                fmt::format("SAMPLER_BINDING({}) uniform samplerCube samp_{};\n", sampler_index,
+                            property.m_code_name);
+            texture_asset->m_define_code = fmt::format("#define HAS_{} 1\n", property.m_code_name);
+          }
+        }
+
+        const auto texture_data = texture_asset->m_cached_asset.m_asset->GetData();
+        if (!texture_data)
+        {
+          return;
+        }
+
+        if (texture_asset->m_texture)
+        {
+          g_gfx->SetTexture(sampler_index, texture_asset->m_texture.get());
+          g_gfx->SetSamplerState(sampler_index, RenderState::GetLinearSamplerState());
+        }
+        else
+        {
+          AbstractTextureType texture_type = AbstractTextureType::Texture_2DArray;
+          if (std::holds_alternative<VideoCommon::ShaderProperty::SamplerCube>(
+                  shader_it->second.m_default))
+          {
+            texture_type = AbstractTextureType::Texture_CubeMap;
+          }
+          else if (std::holds_alternative<VideoCommon::ShaderProperty::Sampler2D>(
+                       shader_it->second.m_default))
+          {
+            texture_type = AbstractTextureType::Texture_2D;
+          }
+
+          if (texture_data->m_texture.m_slices.empty() ||
+              texture_data->m_texture.m_slices[0].m_levels.empty())
+          {
+            return;
+          }
+
+          auto& first_slice = texture_data->m_texture.m_slices[0];
+          const TextureConfig texture_config(
+              first_slice.m_levels[0].width, first_slice.m_levels[0].height,
+              static_cast<u32>(first_slice.m_levels.size()),
+              static_cast<u32>(texture_data->m_texture.m_slices.size()), 1,
+              first_slice.m_levels[0].format, 0, texture_type);
+          texture_asset->m_texture = g_gfx->CreateTexture(
+              texture_config, fmt::format("Custom shader texture '{}'", property.m_code_name));
+          for (std::size_t slice_index = 0; slice_index < texture_data->m_texture.m_slices.size();
+               slice_index++)
+          {
+            auto& slice = texture_data->m_texture.m_slices[slice_index];
+            for (u32 level_index = 0; level_index < static_cast<u32>(slice.m_levels.size());
+                 ++level_index)
+            {
+              auto& level = slice.m_levels[level_index];
+              texture_asset->m_texture->Load(level_index, level.width, level.height,
+                                             level.row_length, level.data.data(), level.data.size(),
+                                             static_cast<u32>(slice_index));
+            }
+          }
+        }
+
+        sampler_index++;
+      }
+    }
+    else
+    {
+      VideoCommon::MaterialProperty::WriteToMemory(material_buffer, property);
+    }
+  }
+
+  if (m_last_generated_shader_code.GetBuffer().empty())
+  {
+    // Calculate shader details
+    std::string color_shader_data =
+        ReplaceAll(shader_data->m_shader_source, "custom_main", CUSTOM_PIXELSHADER_COLOR_FUNC);
+    const auto global_conflicts = GlobalConflicts(color_shader_data);
+    color_shader_data = ReplaceAll(color_shader_data, "\r\n", "\n");
+    color_shader_data = ReplaceAll(color_shader_data, "{", "{{");
+    color_shader_data = ReplaceAll(color_shader_data, "}", "}}");
+    // First replace global conflicts with dummy strings
+    // This avoids the problem where a shorter word
+    // is in a longer word, ex two functions:  'execute' and 'execute_fast'
+    for (std::size_t i = 0; i < global_conflicts.size(); i++)
+    {
+      const std::string& identifier = global_conflicts[i];
+      color_shader_data =
+          ReplaceAll(color_shader_data, identifier, fmt::format("_{0}_DOLPHIN_TEMP_{0}_", i));
+    }
+    // Now replace the temporaries with the actual value
+    for (std::size_t i = 0; i < global_conflicts.size(); i++)
+    {
+      const std::string& identifier = global_conflicts[i];
+      color_shader_data = ReplaceAll(color_shader_data, fmt::format("_{0}_DOLPHIN_TEMP_{0}_", i),
+                                     fmt::format("{}_{{0}}", identifier));
+    }
+
+    for (const auto& game_texture : m_game_textures)
+    {
+      if (!game_texture)
+        continue;
+
+      m_last_generated_shader_code.Write("{}", game_texture->m_sampler_code);
+      m_last_generated_shader_code.Write("{}", game_texture->m_define_code);
+    }
+
+    for (std::size_t i = 0; i < texture_units.size(); i++)
+    {
+      const auto& texture_unit = texture_units[i];
+      m_last_generated_shader_code.Write(
+          "#define TEX_COORD{} data.texcoord[data.texmap_to_texcoord_index[{}]].xy\n", i,
+          texture_unit);
+    }
+    m_last_generated_shader_code.Write("{}", color_shader_data);
+  }
+}