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84 lines
2.3 KiB
C++
84 lines
2.3 KiB
C++
/* FCE Ultra - NES/Famicom Emulator
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*
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* Copyright notice for this file:
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* Copyright (C) 2002 Xodnizel
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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// implementation of Subor Mouse
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// used in Educational Computer 2000
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#include <string.h>
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#include <stdlib.h>
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#include "share.h"
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typedef struct {
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uint8 latch;
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int32 dx,dy;
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uint32 mb;
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} MOUSE;
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static MOUSE Mouse;
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// since this game only picks up 1 mickey per frame,
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// allow a single delta to spread out over a few frames
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// to make it easier to move.
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const int INERTIA = 32;
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static void StrobeMOUSE(int w)
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{
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Mouse.latch = Mouse.mb & 0x03;
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int32 dx = Mouse.dx;
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int32 dy = Mouse.dy;
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if (dx > 0) { Mouse.latch |= (0x2 << 2); --Mouse.dx; }
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else if (dx < 0) { Mouse.latch |= (0x3 << 2); ++Mouse.dx; }
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if (dy > 0) { Mouse.latch |= (0x2 << 4); --Mouse.dy; }
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else if (dy < 0) { Mouse.latch |= (0x3 << 4); ++Mouse.dy; }
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//FCEU_printf("Subor Mouse: %02X\n",Mouse.latch);
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}
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static uint8 ReadMOUSE(int w)
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{
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uint8 result = Mouse.latch & 0x01;
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Mouse.latch = (Mouse.latch >> 1) | 0x80;
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return result;
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}
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static void UpdateMOUSE(int w, void *data, int arg)
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{
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uint32 *ptr=(uint32*)data;
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Mouse.dx += ptr[0]; ptr[0] = 0;
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Mouse.dy += ptr[1]; ptr[1] = 0;
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Mouse.mb = ptr[2];
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if (Mouse.dx > INERTIA) Mouse.dx = INERTIA;
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else if (Mouse.dx < -INERTIA) Mouse.dx = -INERTIA;
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if (Mouse.dy > INERTIA) Mouse.dy = INERTIA;
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else if (Mouse.dy < -INERTIA) Mouse.dy = -INERTIA;
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}
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static INPUTC MOUSEC={ReadMOUSE,0,StrobeMOUSE,UpdateMOUSE,0,0};
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INPUTC *FCEU_InitMouse(int w)
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{
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memset(&Mouse,0,sizeof(Mouse));
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return(&MOUSEC);
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}
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