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Implement glfwGetJoystickHats

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This moves the buttons-as-hats logic to shared code and adds the
GLFW_JOYSTICK_HAT_BUTTONS input mode as a way to disable this legacy
behavior.

Fixes #889.
This commit is contained in:
Camilla Löwy
2017-03-01 23:27:20 +01:00
parent 368dec7ac7
commit 798d7c6d68
13 changed files with 282 additions and 82 deletions
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src/input.c
+40 -4
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@@ -140,6 +140,19 @@ void _glfwInputJoystickButton(int jid, int button, char value)
_glfw.joysticks[jid].buttons[button] = value;
}
void _glfwInputJoystickHat(int jid, int hat, char value)
{
_GLFWjoystick* js = _glfw.joysticks + jid;
const int base = js->buttonCount + hat * 4;
js->buttons[base + 0] = (value & 0x01) ? GLFW_PRESS : GLFW_RELEASE;
js->buttons[base + 1] = (value & 0x02) ? GLFW_PRESS : GLFW_RELEASE;
js->buttons[base + 2] = (value & 0x04) ? GLFW_PRESS : GLFW_RELEASE;
js->buttons[base + 3] = (value & 0x08) ? GLFW_PRESS : GLFW_RELEASE;
js->hats[hat] = value;
}
//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
@@ -152,7 +165,10 @@ GLFWbool _glfwIsPrintable(int key)
key == GLFW_KEY_KP_EQUAL;
}
_GLFWjoystick* _glfwAllocJoystick(const char* name, int axisCount, int buttonCount)
_GLFWjoystick* _glfwAllocJoystick(const char* name,
int axisCount,
int buttonCount,
int hatCount)
{
int jid;
_GLFWjoystick* js;
@@ -170,9 +186,11 @@ _GLFWjoystick* _glfwAllocJoystick(const char* name, int axisCount, int buttonCou
js->present = GLFW_TRUE;
js->name = strdup(name);
js->axes = calloc(axisCount, sizeof(float));
js->buttons = calloc(buttonCount, 1);
js->buttons = calloc(buttonCount + hatCount * 4, 1);
js->hats = calloc(hatCount, 1);
js->axisCount = axisCount;
js->buttonCount = buttonCount;
js->hatCount = hatCount;
return js;
}
@@ -182,6 +200,7 @@ void _glfwFreeJoystick(_GLFWjoystick* js)
free(js->name);
free(js->axes);
free(js->buttons);
free(js->hats);
memset(js, 0, sizeof(_GLFWjoystick));
}
@@ -663,13 +682,23 @@ GLFWAPI const unsigned char* glfwGetJoystickButtons(int jid, int* count)
if (!_glfwPlatformPollJoystick(jid, _GLFW_POLL_BUTTONS))
return NULL;
*count = _glfw.joysticks[jid].buttonCount;
if (_glfw.hints.init.hatButtons)
{
*count = _glfw.joysticks[jid].buttonCount +
_glfw.joysticks[jid].hatCount * 4;
}
else
*count = _glfw.joysticks[jid].buttonCount;
return _glfw.joysticks[jid].buttons;
}
GLFWAPI const unsigned char* glfwGetJoystickHats(int jid, int* count)
{
assert(jid >= GLFW_JOYSTICK_1);
assert(jid <= GLFW_JOYSTICK_LAST);
assert(count != NULL);
*count = 0;
_GLFW_REQUIRE_INIT_OR_RETURN(NULL);
@@ -680,7 +709,14 @@ GLFWAPI const unsigned char* glfwGetJoystickHats(int jid, int* count)
return NULL;
}
return NULL;
if (!_glfw.joysticks[jid].present)
return NULL;
if (!_glfwPlatformPollJoystick(jid, _GLFW_POLL_BUTTONS))
return NULL;
*count = _glfw.joysticks[jid].hatCount;
return _glfw.joysticks[jid].hats;
}
GLFWAPI const char* glfwGetJoystickName(int jid)