mirror of
https://github.com/RetroPortingToolKit/psxrecomp
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Matthew Stanley
7ef29ad112
set_input layer=host is a default-mapped gamepad; a real one folds ls_* onto the D-pad in digital mode, the layer dropped the stick. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
24 lines
1.3 KiB
C
24 lines
1.3 KiB
C
#pragma once
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/* The default controller map's digital stick fold for a pad expressed as PSX
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* stick bytes. main.cpp's default map binds ls_up/down/left/right to
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* lefty-/lefty+/leftx-/leftx+ and folds them onto the D-pad (fold_bit) while
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* the pad presents as DIGITAL, with the same per-axis test as
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* controller_source_pressed_h (v > dz, v < -dz). The debug host input layer
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* (set_input {"layer":"host"}) is a default-mapped gamepad, so its left stick
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* must press the D-pad exactly as a physical controller's would. */
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#include <stdint.h>
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/* A PSX stick byte (0x00..0xFF, centre 0x80) in SDL axis units. */
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static inline int psx_stick_byte_to_axis(uint8_t v) { return ((int)v - 0x80) * 256; }
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/* Press (clear, active-low) the D-pad bits the left stick folds onto. */
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static inline uint16_t psx_fold_left_stick_to_dpad(uint16_t word, uint8_t lx,
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uint8_t ly, int deadzone_raw) {
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const int x = psx_stick_byte_to_axis(lx), y = psx_stick_byte_to_axis(ly);
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if (y < -deadzone_raw) word &= (uint16_t)~(1u << 4); /* Up */
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if (x > deadzone_raw) word &= (uint16_t)~(1u << 5); /* Right */
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if (y > deadzone_raw) word &= (uint16_t)~(1u << 6); /* Down */
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if (x < -deadzone_raw) word &= (uint16_t)~(1u << 7); /* Left */
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return word;
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}
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