mirror of
https://github.com/libretro/blueMSX-libretro.git
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96 lines
2.9 KiB
C
Executable File
96 lines
2.9 KiB
C
Executable File
/*****************************************************************************
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** $Source: /cygdrive/d/Private/_SVNROOT/bluemsx/blueMSX/Src/Input/MsxGunstick.c,v $
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**
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** $Revision: 1.9 $
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**
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** $Date: 2008-03-30 18:38:40 $
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**
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** More info: http://www.bluemsx.com
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**
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** Copyright (C) 2003-2006 Daniel Vik
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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., 675 Mass Ave, Cambridge, MA 02139, USA.
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**
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******************************************************************************
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*/
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#include "MsxGunstick.h"
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#include "InputEvent.h"
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#include "ArchInput.h"
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#include "FrameBuffer.h"
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#include "VDP.h"
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#include <stdlib.h>
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#define MIN(a,b) ((a) < (b) ? (a) : (b))
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#define MAX(a,b) ((a) > (b) ? (a) : (b))
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struct MsxGunstick {
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MsxJoystickDevice joyDevice;
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int scanlines;
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};
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#define SENSITIVIY 24
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#define DELAY 64
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#define TRESHOLD 128
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static UInt8 read(MsxGunstick* joystick) {
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FrameBuffer* frameBuffer;
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UInt8 state = (archMouseGetButtonState(0) & 1) << 4;
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int mx, my;
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vdpForceSync();
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archMouseGetState(&mx, &my);
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my = my * joystick->scanlines / 0x10000;
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frameBuffer = frameBufferGetDrawFrame();
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if (frameBuffer != NULL) {
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int scanline = frameBufferGetScanline();
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int myLow = MAX(scanline - DELAY, my - SENSITIVIY);
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int myHigh = MIN(scanline, my);
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int y;
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joystick->scanlines = frameBufferGetLineCount(frameBuffer);
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myLow = MAX(myLow, 0);
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myHigh = MIN(myHigh, frameBufferGetLineCount(frameBuffer));
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for (y = myLow; y < myHigh; y++) {
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int x = mx * (frameBufferGetDoubleWidth(frameBuffer, y) ? 2 : 1) * frameBufferGetMaxWidth(frameBuffer) / 0x10000;
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Pixel rgb = frameBufferGetLine(frameBuffer, y)[x];
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int R = 256 * ((rgb >> COLSHIFT_R) & COLMASK_R) / COLMASK_R;
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int G = 256 * ((rgb >> COLSHIFT_G) & COLMASK_G) / COLMASK_G;
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int B = 256 * ((rgb >> COLSHIFT_B) & COLMASK_B) / COLMASK_B;
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int Y = (int)(0.2989*R + 0.5866*G + 0.1145*B);
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if (Y > TRESHOLD) {
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state |= 1 << 1;
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break;
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}
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}
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}
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return ~state & 0x3f;
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}
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MsxJoystickDevice* msxGunstickCreate()
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{
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MsxGunstick* joystick = (MsxGunstick*)calloc(1, sizeof(MsxGunstick));
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joystick->joyDevice.read = read;
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return (MsxJoystickDevice*)joystick;
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} |