src/video/ataricommon/SDL_ataridevmouse.c
author Ozkan Sezer <sezeroz@gmail.com>
Sat, 14 Sep 2019 17:00:50 +0300
branchSDL-1.2
changeset 13077 cd46eb772bee
parent 13067 654469bd1d06
permissions -rw-r--r--
make SDL_qsort.c to actually link (missing SDL_stdinc.h include)

also sync its comments with version 1.15 from mainstream
     1 /*
     2     SDL - Simple DirectMedia Layer
     3     Copyright (C) 1997-2012 Sam Lantinga
     4 
     5     This library is free software; you can redistribute it and/or
     6     modify it under the terms of the GNU Lesser General Public
     7     License as published by the Free Software Foundation; either
     8     version 2.1 of the License, or (at your option) any later version.
     9 
    10     This library is distributed in the hope that it will be useful,
    11     but WITHOUT ANY WARRANTY; without even the implied warranty of
    12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    13     Lesser General Public License for more details.
    14 
    15     You should have received a copy of the GNU Lesser General Public
    16     License along with this library; if not, write to the Free Software
    17     Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
    18 
    19     Sam Lantinga
    20     slouken@libsdl.org
    21 */
    22 #include "SDL_config.h"
    23 
    24 /*
    25 	MiNT /dev/mouse driver
    26 
    27 	Patrice Mandin
    28 */
    29 
    30 #include <fcntl.h>
    31 #include <unistd.h>
    32 
    33 #include "../../events/SDL_events_c.h"
    34 #include "SDL_ataridevmouse_c.h"
    35 
    36 /* Defines */
    37 
    38 #define DEVICE_NAME	"/dev/mouse"
    39 
    40 /* Local variables */
    41 
    42 static int handle = -1;
    43 static int mouseb, prev_mouseb;
    44 
    45 /* Functions */
    46 
    47 int SDL_AtariDevMouse_Open(void)
    48 {
    49 	int r;
    50 	const char *mousedev;
    51 
    52 	/*
    53 		TODO: Fix the MiNT device driver, that locks mouse for other
    54 		applications, so this is disabled till fixed
    55 	 */
    56 	return 0;
    57 
    58 	/* First, try SDL_MOUSEDEV device */
    59 	mousedev = SDL_getenv("SDL_MOUSEDEV");
    60 	if (mousedev) {
    61 		handle = open(mousedev, 0);
    62 	}
    63 
    64 	/* Failed, try default device */
    65 	if (handle<0) {
    66 		handle = open(DEVICE_NAME, 0);
    67 	}
    68 
    69 	if (handle<0) {
    70 		handle = -1;
    71 		return 0;
    72 	}
    73 
    74 	/* Set non blocking mode */
    75 	r = fcntl(handle, F_GETFL, 0);
    76 	if (r<0) {
    77 		close(handle);
    78 		handle = -1;
    79 		return 0;
    80 	}
    81 
    82 	r |= O_NDELAY;
    83 
    84 	r = fcntl(handle, F_SETFL, r);
    85 	if (r<0) {
    86 		close(handle);
    87 		handle = -1;
    88 		return 0;
    89 	}
    90 
    91 	prev_mouseb = 7;
    92 	return 1;
    93 }
    94 
    95 void SDL_AtariDevMouse_Close(void)
    96 {
    97 	if (handle>0) {
    98 		close(handle);
    99 		handle = -1;
   100 	}
   101 }
   102 
   103 static int atari_GetButton(int button)
   104 {
   105 	switch(button)
   106 	{
   107 		case 0:
   108 			return SDL_BUTTON_RIGHT;
   109 		case 1:
   110 			return SDL_BUTTON_MIDDLE;
   111 		default:
   112 			break;
   113 	}
   114 
   115 	return SDL_BUTTON_LEFT;
   116 }
   117 
   118 void SDL_AtariDevMouse_PostMouseEvents(_THIS, SDL_bool buttonEvents)
   119 {
   120 	unsigned char buffer[3];
   121 	int mousex, mousey;
   122 
   123 	if (handle<0) {
   124 		return;
   125 	}
   126 
   127 	mousex = mousey = 0;
   128 	while (read(handle, buffer, sizeof(buffer))==sizeof(buffer)) {
   129 		mouseb = buffer[0] & 7;
   130 		mousex += (char) buffer[1];
   131 		mousey += (char) buffer[2];
   132 
   133 		/* Mouse button events */
   134 		if (buttonEvents && (mouseb != prev_mouseb)) {
   135 			int i;
   136 
   137 			for (i=0;i<3;i++) {
   138 				int curbutton, prevbutton;
   139 
   140 				curbutton = mouseb & (1<<i);
   141 				prevbutton = prev_mouseb & (1<<i);
   142 			
   143 				if (curbutton && !prevbutton) {
   144 					SDL_PrivateMouseButton(SDL_RELEASED, atari_GetButton(i), 0, 0);
   145 				}
   146 				if (!curbutton && prevbutton) {
   147 					SDL_PrivateMouseButton(SDL_PRESSED, atari_GetButton(i), 0, 0);
   148 				}
   149 			}
   150 
   151 			prev_mouseb = mouseb;
   152 		}
   153 	}
   154 
   155 	/* Mouse motion event */
   156 	if (mousex || mousey) {
   157 		SDL_PrivateMouseMotion(0, 1, mousex, -mousey);
   158 	}
   159 }