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SDLControllerInterface: Add support for optional game controller database

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If an optional "gamecontrollerdb.txt" file exists in the user directory,
then SDL game controller mappings will be loaded from it.

There is an officially endorsed community sourced database in
https://github.com/gabomdq/SDL_GameControllerDB
This commit is contained in:
Hugo Hromic 2020-08-21 20:00:22 +01:00
parent f852be74e8
commit 1e10bef09e
2 changed files with 20 additions and 0 deletions
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17
src/frontend-common/sdl_controller_interface.cpp
View file

@ -1,5 +1,6 @@
#include "sdl_controller_interface.h"
#include "common/assert.h"
#include "common/file_system.h"
#include "common/log.h"
#include "core/controller.h"
#include "core/host_interface.h"
@ -23,6 +24,17 @@ bool SDLControllerInterface::Initialize(CommonHostInterface* host_interface)
FrontendCommon::EnsureSDLInitialized();
const std::string gcdb_file_name = GetGameControllerDBFileName();
if (FileSystem::FileExists(gcdb_file_name.c_str()))
{
Log_InfoPrintf("Loading game controller mappings from '%s'", gcdb_file_name.c_str());
if (SDL_GameControllerAddMappingsFromFile(gcdb_file_name.c_str()) < 0)
{
Log_ErrorPrintf("SDL_GameControllerAddMappingsFromFile(%s) failed: %s",
gcdb_file_name.c_str(), SDL_GetError());
}
}
if (SDL_InitSubSystem(SDL_INIT_JOYSTICK | SDL_INIT_GAMECONTROLLER | SDL_INIT_HAPTIC) < 0)
{
Log_ErrorPrintf("SDL_InitSubSystem(SDL_INIT_JOYSTICK |SDL_INIT_GAMECONTROLLER | SDL_INIT_HAPTIC) failed");
@ -48,6 +60,11 @@ void SDLControllerInterface::Shutdown()
ControllerInterface::Shutdown();
}
std::string SDLControllerInterface::GetGameControllerDBFileName() const
{
return m_host_interface->GetUserDirectoryRelativePath("gamecontrollerdb.txt");
}
void SDLControllerInterface::PollEvents()
{
for (;;)

3
src/frontend-common/sdl_controller_interface.h
View file

@ -17,6 +17,9 @@ public:
bool Initialize(CommonHostInterface* host_interface) override;
void Shutdown() override;
/// Returns the path of the optional game controller database file.
std::string GetGameControllerDBFileName() const;
// Removes all bindings. Call before setting new bindings.
void ClearBindings() override;