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https://github.com/glfw/glfw.git
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Add support for SDL_GameControllerDB
This adds support for importing and applying mappings from the SDL_GameControllerDB database. Related to #900.
This commit is contained in:
Camilla Löwy
+307
@@ -29,12 +29,144 @@
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#include <assert.h>
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#include <float.h>
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#include <math.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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// Internal key state used for sticky keys
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#define _GLFW_STICK 3
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// Internal constants for gamepad mapping source types
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#define _GLFW_JOYSTICK_AXIS 1
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#define _GLFW_JOYSTICK_BUTTON 2
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#define _GLFW_JOYSTICK_HATBIT 3
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// Finds a mapping based on joystick GUID
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//
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static _GLFWmapping* findMapping(const char* guid)
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{
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int i;
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for (i = 0; i < _glfw.mappingCount; i++)
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{
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if (strcmp(_glfw.mappings[i].guid, guid) == 0)
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return _glfw.mappings + i;
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}
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return NULL;
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}
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// Parses an SDL_GameControllerDB line and adds it to the mapping list
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//
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static GLFWbool parseMapping(_GLFWmapping* mapping, const char* string)
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{
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const char* c = string;
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size_t i, length;
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struct
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{
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const char* name;
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_GLFWmapelement* element;
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} fields[] =
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{
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{ "platform", NULL },
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{ "a", mapping->buttons + GLFW_GAMEPAD_BUTTON_A },
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{ "b", mapping->buttons + GLFW_GAMEPAD_BUTTON_B },
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{ "x", mapping->buttons + GLFW_GAMEPAD_BUTTON_X },
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{ "y", mapping->buttons + GLFW_GAMEPAD_BUTTON_Y },
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{ "back", mapping->buttons + GLFW_GAMEPAD_BUTTON_BACK },
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{ "start", mapping->buttons + GLFW_GAMEPAD_BUTTON_START },
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{ "guide", mapping->buttons + GLFW_GAMEPAD_BUTTON_GUIDE },
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{ "leftshoulder", mapping->buttons + GLFW_GAMEPAD_BUTTON_LEFT_BUMPER },
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{ "rightshoulder", mapping->buttons + GLFW_GAMEPAD_BUTTON_RIGHT_BUMPER },
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{ "leftstick", mapping->buttons + GLFW_GAMEPAD_BUTTON_LEFT_THUMB },
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{ "rightstick", mapping->buttons + GLFW_GAMEPAD_BUTTON_RIGHT_THUMB },
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{ "dpup", mapping->buttons + GLFW_GAMEPAD_BUTTON_DPAD_UP },
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{ "dpright", mapping->buttons + GLFW_GAMEPAD_BUTTON_DPAD_RIGHT },
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{ "dpdown", mapping->buttons + GLFW_GAMEPAD_BUTTON_DPAD_DOWN },
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{ "dpleft", mapping->buttons + GLFW_GAMEPAD_BUTTON_DPAD_LEFT },
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{ "lefttrigger", mapping->axes + GLFW_GAMEPAD_AXIS_LEFT_TRIGGER },
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{ "righttrigger", mapping->axes + GLFW_GAMEPAD_AXIS_RIGHT_TRIGGER },
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{ "leftx", mapping->axes + GLFW_GAMEPAD_AXIS_LEFT_X },
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{ "lefty", mapping->axes + GLFW_GAMEPAD_AXIS_LEFT_Y },
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{ "rightx", mapping->axes + GLFW_GAMEPAD_AXIS_RIGHT_X },
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{ "righty", mapping->axes + GLFW_GAMEPAD_AXIS_RIGHT_Y }
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};
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length = strcspn(c, ",");
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if (length != 32 || c[length] != ',')
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{
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_glfwInputError(GLFW_INVALID_VALUE, NULL);
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return GLFW_FALSE;
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}
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memcpy(mapping->guid, c, length);
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c += length + 1;
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length = strcspn(c, ",");
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if (length >= sizeof(mapping->name) || c[length] != ',')
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{
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_glfwInputError(GLFW_INVALID_VALUE, NULL);
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return GLFW_FALSE;
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}
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memcpy(mapping->name, c, length);
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c += length + 1;
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while (*c)
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{
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for (i = 0; i < sizeof(fields) / sizeof(fields[0]); i++)
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{
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length = strlen(fields[i].name);
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if (strncmp(c, fields[i].name, length) != 0 || c[length] != ':')
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continue;
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c += length + 1;
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if (fields[i].element)
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{
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if (*c == 'a')
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fields[i].element->type = _GLFW_JOYSTICK_AXIS;
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else if (*c == 'b')
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fields[i].element->type = _GLFW_JOYSTICK_BUTTON;
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else if (*c == 'h')
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fields[i].element->type = _GLFW_JOYSTICK_HATBIT;
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else
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break;
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if (fields[i].element->type == _GLFW_JOYSTICK_HATBIT)
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{
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const unsigned int hat = strtoul(c + 1, (char**) &c, 10);
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const unsigned int bit = strtoul(c + 1, (char**) &c, 10);
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fields[i].element->value = (hat << 4) | bit;
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}
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else
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fields[i].element->value = (uint8_t) strtoul(c + 1, (char**) &c, 10);
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}
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else
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{
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length = strlen(_GLFW_PLATFORM_MAPPING_NAME);
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if (strncmp(c, _GLFW_PLATFORM_MAPPING_NAME, length) != 0)
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return GLFW_FALSE;
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}
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break;
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}
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c += strcspn(c, ",");
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c += strspn(c, ",");
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}
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for (i = 0; i < 32; i++)
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{
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if (mapping->guid[i] >= 'A' && mapping->guid[i] <= 'F')
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mapping->guid[i] += 'a' - 'A';
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}
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_glfwPlatformUpdateGamepadGUID(mapping->guid);
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return GLFW_TRUE;
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}
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//////////////////////////////////////////////////////////////////////////
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////// GLFW event API //////
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@@ -166,6 +298,7 @@ GLFWbool _glfwIsPrintable(int key)
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}
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_GLFWjoystick* _glfwAllocJoystick(const char* name,
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const char* guid,
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int axisCount,
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int buttonCount,
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int hatCount)
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@@ -191,6 +324,9 @@ _GLFWjoystick* _glfwAllocJoystick(const char* name,
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js->axisCount = axisCount;
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js->buttonCount = buttonCount;
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js->hatCount = hatCount;
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js->mapping = findMapping(guid);
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strcpy(js->guid, guid);
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return js;
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}
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@@ -748,6 +884,177 @@ GLFWAPI GLFWjoystickfun glfwSetJoystickCallback(GLFWjoystickfun cbfun)
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return cbfun;
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}
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GLFWAPI int glfwUpdateGamepadMappings(const char* string)
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{
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int jid;
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const char* c = string;
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assert(string != NULL);
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_GLFW_REQUIRE_INIT_OR_RETURN(GLFW_FALSE);
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while (*c)
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{
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if (isxdigit(*c))
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{
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char line[1024];
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const size_t length = strcspn(c, "\r\n");
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if (length < sizeof(line))
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{
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_GLFWmapping mapping = {{0}};
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memcpy(line, c, length);
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line[length] = '\0';
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if (parseMapping(&mapping, line))
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{
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_GLFWmapping* previous = findMapping(mapping.guid);
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if (previous)
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*previous = mapping;
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else
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{
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_glfw.mappingCount++;
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_glfw.mappings =
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realloc(_glfw.mappings,
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sizeof(_GLFWmapping) * _glfw.mappingCount);
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_glfw.mappings[_glfw.mappingCount - 1] = mapping;
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}
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}
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}
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c += length;
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}
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else
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{
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c += strcspn(c, "\r\n");
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c += strspn(c, "\r\n");
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}
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}
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for (jid = 0; jid <= GLFW_JOYSTICK_LAST; jid++)
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{
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_GLFWjoystick* js = _glfw.joysticks + jid;
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if (js->present)
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js->mapping = findMapping(js->guid);
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}
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return GLFW_TRUE;
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}
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GLFWAPI int glfwJoystickIsGamepad(int jid)
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{
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assert(jid >= GLFW_JOYSTICK_1);
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assert(jid <= GLFW_JOYSTICK_LAST);
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_GLFW_REQUIRE_INIT_OR_RETURN(GLFW_FALSE);
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if (jid < 0 || jid > GLFW_JOYSTICK_LAST)
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{
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_glfwInputError(GLFW_INVALID_ENUM, "Invalid joystick ID %i", jid);
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return GLFW_FALSE;
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}
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if (!_glfw.joysticks[jid].present)
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return GLFW_FALSE;
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if (!_glfwPlatformPollJoystick(jid, _GLFW_POLL_PRESENCE))
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return GLFW_FALSE;
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return _glfw.joysticks[jid].mapping != NULL;
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}
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GLFWAPI const char* glfwGetGamepadName(int jid)
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{
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assert(jid >= GLFW_JOYSTICK_1);
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assert(jid <= GLFW_JOYSTICK_LAST);
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_GLFW_REQUIRE_INIT_OR_RETURN(NULL);
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if (jid < 0 || jid > GLFW_JOYSTICK_LAST)
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{
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_glfwInputError(GLFW_INVALID_ENUM, "Invalid joystick ID %i", jid);
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return NULL;
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}
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if (!_glfw.joysticks[jid].present)
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return NULL;
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if (!_glfwPlatformPollJoystick(jid, _GLFW_POLL_PRESENCE))
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return NULL;
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if (!_glfw.joysticks[jid].mapping)
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return NULL;
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return _glfw.joysticks[jid].mapping->name;
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}
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GLFWAPI int glfwGetGamepadState(int jid, GLFWgamepadstate* state)
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{
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int i;
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_GLFWjoystick* js;
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assert(jid >= GLFW_JOYSTICK_1);
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assert(jid <= GLFW_JOYSTICK_LAST);
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assert(state != NULL);
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memset(state, 0, sizeof(GLFWgamepadstate));
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_GLFW_REQUIRE_INIT_OR_RETURN(GLFW_FALSE);
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if (jid < 0 || jid > GLFW_JOYSTICK_LAST)
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{
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_glfwInputError(GLFW_INVALID_ENUM, "Invalid joystick ID %i", jid);
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return GLFW_FALSE;
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}
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js = _glfw.joysticks + jid;
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if (!js->present)
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return GLFW_FALSE;
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if (!_glfwPlatformPollJoystick(jid, _GLFW_POLL_ALL))
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return GLFW_FALSE;
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if (!js->mapping)
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return GLFW_FALSE;
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for (i = 0; i <= GLFW_GAMEPAD_BUTTON_LAST; i++)
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{
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if (js->mapping->buttons[i].type == _GLFW_JOYSTICK_AXIS)
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{
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if (fabs(js->axes[js->mapping->buttons[i].value]) > 0.5)
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state->buttons[i] = GLFW_PRESS;
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}
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else if (js->mapping->buttons[i].type == _GLFW_JOYSTICK_HATBIT)
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{
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const unsigned int hat = js->mapping->buttons[i].value >> 4;
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const unsigned int bit = js->mapping->buttons[i].value & 0xf;
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if (js->hats[hat] & bit)
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state->buttons[i] = GLFW_PRESS;
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}
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else if (js->mapping->buttons[i].type == _GLFW_JOYSTICK_BUTTON)
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state->buttons[i] = js->buttons[js->mapping->buttons[i].value];
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}
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for (i = 0; i <= GLFW_GAMEPAD_AXIS_LAST; i++)
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{
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if (js->mapping->axes[i].type == _GLFW_JOYSTICK_AXIS)
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state->axes[i] = js->axes[js->mapping->axes[i].value];
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else if (js->mapping->buttons[i].type == _GLFW_JOYSTICK_HATBIT)
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{
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const unsigned int hat = js->mapping->buttons[i].value >> 4;
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const unsigned int bit = js->mapping->buttons[i].value & 0xf;
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if (js->hats[hat] & bit)
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state->axes[i] = 1.f;
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}
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else if (js->mapping->buttons[i].type == _GLFW_JOYSTICK_BUTTON)
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state->axes[i] = (float) js->buttons[js->mapping->axes[i].value];
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}
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return GLFW_TRUE;
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}
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GLFWAPI void glfwSetClipboardString(GLFWwindow* handle, const char* string)
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{
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_GLFWwindow* window = (_GLFWwindow*) handle;
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