1 files changed, 221 insertions, 0 deletions
diff --git a/Source/Core/InputCommon/DynamicInputTextures/DITConfiguration.cpp b/Source/Core/InputCommon/DynamicInputTextures/DITConfiguration.cpp
new file mode 100644
index 0000000000..b057abff2b
--- /dev/null
+++ b/Source/Core/InputCommon/DynamicInputTextures/DITConfiguration.cpp
@@ -0,0 +1,221 @@
+// Copyright 2019 Dolphin Emulator Project
+// Licensed under GPLv2+
+// Refer to the license.txt file included.
+
+#include "InputCommon/DynamicInputTextures/DITConfiguration.h"
+
+#include <optional>
+#include <sstream>
+#include <string>
+
+#include <picojson.h>
+
+#include "Common/CommonPaths.h"
+#include "Common/FileUtil.h"
+#include "Common/Logging/Log.h"
+#include "Common/StringUtil.h"
+#include "Core/ConfigManager.h"
+#include "InputCommon/ControllerEmu/ControllerEmu.h"
+#include "InputCommon/DynamicInputTextures/DITSpecification.h"
+#include "InputCommon/ImageOperations.h"
+
+namespace
+{
+std::string GetStreamAsString(std::ifstream& stream)
+{
+  std::stringstream ss;
+  ss << stream.rdbuf();
+  return ss.str();
+}
+}  // namespace
+
+namespace InputCommon::DynamicInputTextures
+{
+Configuration::Configuration(const std::string& json_file)
+{
+  std::ifstream json_stream;
+  File::OpenFStream(json_stream, json_file, std::ios_base::in);
+  if (!json_stream.is_open())
+  {
+    ERROR_LOG_FMT(VIDEO, "Failed to load dynamic input json file '{}'", json_file);
+    m_valid = false;
+    return;
+  }
+
+  picojson::value root;
+  const auto error = picojson::parse(root, GetStreamAsString(json_stream));
+
+  if (!error.empty())
+  {
+    ERROR_LOG_FMT(VIDEO, "Failed to load dynamic input json file '{}' due to parse error: {}",
+                  json_file, error);
+    m_valid = false;
+    return;
+  }
+
+  SplitPath(json_file, &m_base_path, nullptr, nullptr);
+
+  const picojson::value& specification_json = root.get("specification");
+  u8 specification = 1;
+  if (specification_json.is<double>())
+  {
+    const double spec_from_json = specification_json.get<double>();
+    if (spec_from_json < static_cast<double>(std::numeric_limits<u8>::min()) ||
+        spec_from_json > static_cast<double>(std::numeric_limits<u8>::max()))
+    {
+      ERROR_LOG_FMT(
+          VIDEO,
+          "Failed to load dynamic input json file '{}', specification '{}' is not within bounds",
+          json_file, spec_from_json);
+      m_valid = false;
+      return;
+    }
+    specification = static_cast<u8>(spec_from_json);
+  }
+
+  if (specification != 1)
+  {
+    ERROR_LOG_FMT(VIDEO,
+                  "Failed to load dynamic input json file '{}', specification '{}' is invalid",
+                  json_file, specification);
+    m_valid = false;
+    return;
+  }
+
+  m_valid = ProcessSpecificationV1(root, m_dynamic_input_textures, m_base_path, json_file);
+}
+
+Configuration::~Configuration() = default;
+
+bool Configuration::GenerateTextures(const IniFile::Section* sec,
+                                     const std::string& controller_name) const
+{
+  bool any_dirty = false;
+  for (const auto& texture_data : m_dynamic_input_textures)
+  {
+    any_dirty |= GenerateTexture(sec, controller_name, texture_data);
+  }
+
+  return any_dirty;
+}
+
+bool Configuration::GenerateTexture(const IniFile::Section* sec, const std::string& controller_name,
+                                    const Data& texture_data) const
+{
+  std::string device_name;
+  if (!sec->Get("Device", &device_name))
+  {
+    return false;
+  }
+
+  auto emulated_controls_iter = texture_data.m_emulated_controllers.find(controller_name);
+  if (emulated_controls_iter == texture_data.m_emulated_controllers.end())
+  {
+    return false;
+  }
+
+  bool device_found = true;
+  auto host_devices_iter = texture_data.m_host_devices.find(device_name);
+  if (host_devices_iter == texture_data.m_host_devices.end())
+  {
+    // If we fail to find our exact device,
+    // it's possible the creator doesn't care (single player game)
+    // and has used a wildcard for any device
+    host_devices_iter = texture_data.m_host_devices.find("");
+
+    if (host_devices_iter == texture_data.m_host_devices.end())
+    {
+      device_found = false;
+    }
+  }
+
+  // Two copies of the loaded texture
+  // The first one is used as a fallback if a key or device isn't mapped
+  // the second one is used as the final image to write to the textures directory
+  const auto original_image = LoadImage(m_base_path + texture_data.m_image_name);
+  auto image_to_write = original_image;
+
+  bool dirty = false;
+  for (auto& [emulated_key, rects] : emulated_controls_iter->second)
+  {
+    // TODO: Remove this line when we move to C++20
+    auto& rects_ref = rects;
+    auto apply_original = [&] {
+      for (const auto& rect : rects_ref)
+      {
+        CopyImageRegion(*original_image, *image_to_write, rect, rect);
+        dirty = true;
+      }
+    };
+
+    if (!device_found)
+    {
+      // If we get here, that means the controller is set to a
+      // device not exposed to the pack
+      // We still apply the original image, in case the user
+      // switched devices and wants to see the changes
+      apply_original();
+      continue;
+    }
+
+    std::string host_key;
+    sec->Get(emulated_key, &host_key);
+
+    const auto input_image_iter = host_devices_iter->second.find(host_key);
+    if (input_image_iter == host_devices_iter->second.end())
+    {
+      apply_original();
+    }
+    else
+    {
+      const auto host_key_image = LoadImage(m_base_path + input_image_iter->second);
+
+      for (const auto& rect : rects)
+      {
+        InputCommon::ImagePixelData pixel_data;
+        if (host_key_image->width == rect.GetWidth() && host_key_image->height == rect.GetHeight())
+        {
+          pixel_data = *host_key_image;
+        }
+        else if (texture_data.m_preserve_aspect_ratio)
+        {
+          pixel_data = ResizeKeepAspectRatio(ResizeMode::Nearest, *host_key_image, rect.GetWidth(),
+                                             rect.GetHeight(), Pixel{0, 0, 0, 0});
+        }
+        else
+        {
+          pixel_data =
+              Resize(ResizeMode::Nearest, *host_key_image, rect.GetWidth(), rect.GetHeight());
+        }
+
+        CopyImageRegion(pixel_data, *image_to_write, Rect{0, 0, rect.GetWidth(), rect.GetHeight()},
+                        rect);
+        dirty = true;
+      }
+    }
+  }
+
+  if (dirty)
+  {
+    const std::string& game_id = SConfig::GetInstance().GetGameID();
+    const auto hi_res_folder =
+        File::GetUserPath(D_HIRESTEXTURES_IDX) + texture_data.m_generated_folder_name;
+    if (!File::IsDirectory(hi_res_folder))
+    {
+      File::CreateDir(hi_res_folder);
+    }
+    WriteImage(hi_res_folder + DIR_SEP + texture_data.m_hires_texture_name, *image_to_write);
+
+    const auto game_id_folder = hi_res_folder + DIR_SEP + "gameids";
+    if (!File::IsDirectory(game_id_folder))
+    {
+      File::CreateDir(game_id_folder);
+    }
+    File::CreateEmptyFile(game_id_folder + DIR_SEP + game_id + ".txt");
+
+    return true;
+  }
+
+  return false;
+}
+}  // namespace InputCommon::DynamicInputTextures