ResourcesManager Class Reference

#include <ResourcesManager.hxx>

Inheritance diagram for ResourcesManager:

Collaboration diagram for ResourcesManager:

Public Member Functions
	ResourcesManager (ResourcesManager const &)=delete
ResourcesManager &	operator= (ResourcesManager const &)=delete
SDL_Texture *	getUITexture (const std::string &uiElement)
	retrieves texture for a tileID More...
SDL_Texture *	getTileTexture (const std::string &id)
SDL_Surface *	getTileSurface (const std::string &id)
void	loadTexture (const std::string &id, const std::string &fileName)
SDL_Color	getColorOfPixelInSurface (const std::string &tileID, int x, int y)
	Get the Color Of Pixel In Surface object at a given coordinate. More...

Public Attributes
friend	Singleton< ResourcesManager >

Private Member Functions
	ResourcesManager ()
	~ResourcesManager ()
void	loadUITexture ()
	Load Texture in to Texture Map, if an entry for this tile ID does not yet exist. More...
void	flush ()
	Delete everything. Should be called from the destuctor only. More...
SDL_Surface *	createSurfaceFromFile (const std::string &fileName)
SDL_Texture *	createTextureFromSurface (SDL_Surface *surface)

Private Attributes
std::unordered_map< std::string, std::unordered_map< std::string, SDL_Texture * > >	m_uiTextureMap
std::unordered_map< std::string, SDL_Texture * >	m_tileTextureMap
std::unordered_map< std::string, SDL_Surface * >	m_surfaceMap

Additional Inherited Members
Static Public Member Functions inherited from Singleton< ResourcesManager >
static ResourcesManager &	instance (void)
	Get an instance of the singleton. More...
Protected Member Functions inherited from Singleton< ResourcesManager >
	Singleton () noexcept=default
	~Singleton () noexcept=default

Detailed Description

Definition at line 11 of file ResourcesManager.hxx.

Constructor & Destructor Documentation

ResourcesManager() [1/2]

ResourcesManager::ResourcesManager ( ResourcesManager const &  )

delete

ResourcesManager() [2/2]

ResourcesManager::ResourcesManager ( )

private

Definition at line 16 of file ResourcesManager.cxx.

{ loadUITexture(); }

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~ResourcesManager()

ResourcesManager::~ResourcesManager ( )

private

Definition at line 18 of file ResourcesManager.cxx.

{ flush(); }

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Member Function Documentation

createSurfaceFromFile()

SDL_Surface * ResourcesManager::createSurfaceFromFile ( const std::string &  fileName )

private

Definition at line 77 of file ResourcesManager.cxx.

{
  string fName = fs::getBasePath() + fileName;
 
  if (!fs::fileExists(fName))
    throw ConfigurationError(TRACE_INFO "File " + fName + " doesn't exist");
 
  SDL_Surface *surface = IMG_Load(fName.c_str());
 
  if (surface)
    return surface;
 
  throw ConfigurationError(TRACE_INFO "Could not load Texture from file " + fName + ": " + IMG_GetError());
}

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createTextureFromSurface()

SDL_Texture * ResourcesManager::createTextureFromSurface ( SDL_Surface *  surface )

private

Definition at line 92 of file ResourcesManager.cxx.

{
  SDL_Texture *texture = SDL_CreateTextureFromSurface(WindowManager::instance().getRenderer(), surface);
 
  if (texture)
    return texture;
 
  throw UIError(TRACE_INFO "Texture could not be created! SDL Error: " + string{SDL_GetError()});
}

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flush()

void ResourcesManager::flush ( )

private

Delete everything. Should be called from the destuctor only.

Definition at line 102 of file ResourcesManager.cxx.

{
  for (const auto &it : m_surfaceMap)
  {
    SDL_FreeSurface(it.second);
  }
  m_surfaceMap.clear();
 
  for (const auto &it : m_tileTextureMap)
  {
    SDL_DestroyTexture(it.second);
  }
  m_tileTextureMap.clear();
 
  for (const auto &it : m_uiTextureMap)
  {
    for (const auto &ita : it.second)
    {
      SDL_DestroyTexture(ita.second);
    }
  }
  m_uiTextureMap.clear();
}

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getColorOfPixelInSurface()

SDL_Color ResourcesManager::getColorOfPixelInSurface	(	const std::string &	tileID,
		int	x,
		int	y
	)

Get the Color Of Pixel In Surface object at a given coordinate.

Parameters

tileID	The tileID of object to check
x	x ccoordinate within the surface
y	y ccoordinate within the surface

Returns

SDL_Color at the given coordinate

Definition at line 126 of file ResourcesManager.cxx.

{
  SDL_Color Color{0, 0, 0, SDL_ALPHA_TRANSPARENT};
  // create and initialize a variable within the condition
  if (SDL_Surface *surface = getTileSurface(tileID); surface)
  {
    const int bpp = surface->format->BytesPerPixel;
    Uint8 *p = &static_cast<Uint8 *>(surface->pixels)[y * surface->pitch + x * bpp];
    const Uint32 pixel = *reinterpret_cast<Uint32 *>(p);
 
    SDL_GetRGBA(pixel, surface->format, &Color.r, &Color.g, &Color.b, &Color.a);
  }
 
  return Color;
}

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getTileSurface()

SDL_Surface * ResourcesManager::getTileSurface

(

const std::string &

id

)

Definition at line 68 of file ResourcesManager.cxx.

{
  if (m_surfaceMap.find(id) != m_surfaceMap.end())
  {
    return m_surfaceMap.at(id);
  }
  throw UIError(TRACE_INFO "No surface found for " + id);
}

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getTileTexture()

SDL_Texture * ResourcesManager::getTileTexture

(

const std::string &

id

)

Retrieves Color of a specific tileID at coordinates with the texture

Definition at line 59 of file ResourcesManager.cxx.

{
  if (m_tileTextureMap.find(id) != m_tileTextureMap.end())
  {
    return m_tileTextureMap.at(id);
  }
  throw UIError(TRACE_INFO "No texture found for " + id);
}

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getUITexture()

SDL_Texture * ResourcesManager::getUITexture

(

const std::string &

uiElement

)

retrieves texture for a tileID

Definition at line 44 of file ResourcesManager.cxx.

{
  std::string texture = "Texture_Default";
  if (m_uiTextureMap[uiElement].find(texture) != m_uiTextureMap[uiElement].end())
  {
    return m_uiTextureMap[uiElement].at(texture);
  }
  if (m_uiTextureMap[uiElement].find("Texture_Default") != m_uiTextureMap[uiElement].end())
  {
    // If no texture is found, check if there's a default texture
    return m_uiTextureMap[uiElement].at("Texture_Default");
  }
  throw UIError(TRACE_INFO "No texture found for " + uiElement);
}

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loadTexture()

void ResourcesManager::loadTexture	(	const std::string &	id,
		const std::string &	fileName
	)

Definition at line 20 of file ResourcesManager.cxx.

{
  m_surfaceMap[id] = createSurfaceFromFile(fileName);
  m_tileTextureMap[id] = createTextureFromSurface(m_surfaceMap[id]);
}

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loadUITexture()

void ResourcesManager::loadUITexture ( )

private

Load Texture in to Texture Map, if an entry for this tile ID does not yet exist.

Keep in Mind that the texture id is unique and there can't be two textures with the same id. If colorkey is set - Use Magic Pink (255,255,0) for transparency

Exceptions

ConfigurationError

when loading configuration results in an error

Definition at line 26 of file ResourcesManager.cxx.

{
  std::string jsonFileContent = fs::readFileAsString(Settings::instance().uiDataJSONFile.get());
  const json uiDataJSON = json::parse(jsonFileContent, nullptr, false);
 
  // check if json file can be parsed
  if (uiDataJSON.is_discarded())
    throw ConfigurationError(TRACE_INFO "Error parsing JSON File " + Settings::instance().uiDataJSONFile.get());
 
  for (const auto &tileID : uiDataJSON.items())
  {
    for (auto it = uiDataJSON[tileID.key()].begin(); it != uiDataJSON[tileID.key()].end(); ++it)
    {
      m_uiTextureMap[tileID.key()][it.key()] = createTextureFromSurface(createSurfaceFromFile(it.value()));
    }
  }
}

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operator=()

ResourcesManager& ResourcesManager::operator= ( ResourcesManager const &  )

delete

Member Data Documentation

m_surfaceMap

std::unordered_map<std::string, SDL_Surface *> ResourcesManager::m_surfaceMap

private

Definition at line 60 of file ResourcesManager.hxx.

m_tileTextureMap

std::unordered_map<std::string, SDL_Texture *> ResourcesManager::m_tileTextureMap

private

Definition at line 59 of file ResourcesManager.hxx.

m_uiTextureMap

std::unordered_map<std::string, std::unordered_map<std::string, SDL_Texture *> > ResourcesManager::m_uiTextureMap

private

Definition at line 57 of file ResourcesManager.hxx.

Singleton< ResourcesManager >

friend ResourcesManager::Singleton< ResourcesManager >

Definition at line 14 of file ResourcesManager.hxx.

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The documentation for this class was generated from the following files:

• src/engine/ResourcesManager.hxx
• src/engine/ResourcesManager.cxx