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expose analog-is-circle functionality to libretro

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This commit is contained in:
hunterk 2023-01-13 17:22:24 -06:00
parent 027edd6f59
commit ce4e42eb2b
2 changed files with 45 additions and 0 deletions
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35
libretro/libretro.cpp
View File

@ -722,6 +722,16 @@ static void check_variables(CoreParameter &coreParam)
g_Config.iButtonPreference = PSP_SYSTEMPARAM_BUTTON_CIRCLE;
}
var.key = "ppsspp_analog_is_circular";
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
if (!strcmp(var.value, "disabled"))
g_Config.bAnalogIsCircular = false;
else
g_Config.bAnalogIsCircular = true;
}
var.key = "ppsspp_internal_resolution";
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
@ -1534,6 +1544,31 @@ static void retro_input(void)
float y_left = input_state_cb(0, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_LEFT, RETRO_DEVICE_ID_ANALOG_Y) / -32767.0f;
float x_right = input_state_cb(0, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_RIGHT, RETRO_DEVICE_ID_ANALOG_X) / 32767.0f;
float y_right = input_state_cb(0, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_RIGHT, RETRO_DEVICE_ID_ANALOG_Y) / -32767.0f;
__CtrlSetAnalogXY(CTRL_STICK_LEFT, x_left, y_left);
__CtrlSetAnalogXY(CTRL_STICK_RIGHT, x_right, y_right);
// Analog circle vs square gate compensation
// copied from ControlMapper.cpp's ConvertAnalogStick function
const bool isCircular = g_Config.bAnalogIsCircular;
float norm = std::max(fabsf(x_left), fabsf(y_left));
if (norm == 0.0f)
return;
if (isCircular) {
float newNorm = sqrtf(x_left * x_left + y_left * y_left);
float factor = newNorm / norm;
x_left *= factor;
y_left *= factor;
norm = newNorm;
}
float mappedNorm = norm;
x_left = std::clamp(x_left / norm * mappedNorm, -1.0f, 1.0f);
y_left = std::clamp(y_left / norm * mappedNorm, -1.0f, 1.0f);
__CtrlSetAnalogXY(CTRL_STICK_LEFT, x_left, y_left);
__CtrlSetAnalogXY(CTRL_STICK_RIGHT, x_right, y_right);
}

10
libretro/libretro_core_options.h
View File

@ -261,6 +261,16 @@ struct retro_core_option_v2_definition option_defs_us[] = {
},
"Cross"
},
{
"ppsspp_analog_is_circular",
"Analog Circle vs Square Gate Compensation",
NULL,
NULL,
NULL,
"system",
BOOL_OPTIONS,
"disabled"
},
{
"ppsspp_internal_resolution",
"Internal Resolution (Restart)",