e14743d1 |
1 | /* |
2 | SDL - Simple DirectMedia Layer |
3 | Copyright (C) 1997-2009 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 | #include <X11/Xlib.h> |
25 | #include <X11/Xutil.h> |
26 | |
27 | #include "SDL_mouse.h" |
28 | #include "../../events/SDL_events_c.h" |
29 | #include "../SDL_cursor_c.h" |
30 | #include "SDL_x11dga_c.h" |
31 | #include "SDL_x11mouse_c.h" |
32 | |
33 | |
34 | /* The implementation dependent data for the window manager cursor */ |
35 | struct WMcursor { |
36 | Cursor x_cursor; |
37 | }; |
38 | |
39 | |
40 | void X11_FreeWMCursor(_THIS, WMcursor *cursor) |
41 | { |
42 | if ( SDL_Display != NULL ) { |
43 | SDL_Lock_EventThread(); |
44 | XFreeCursor(SDL_Display, cursor->x_cursor); |
45 | XSync(SDL_Display, False); |
46 | SDL_Unlock_EventThread(); |
47 | } |
48 | SDL_free(cursor); |
49 | } |
50 | |
51 | WMcursor *X11_CreateWMCursor(_THIS, |
52 | Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y) |
53 | { |
54 | WMcursor *cursor; |
55 | XGCValues GCvalues; |
56 | GC GCcursor; |
57 | XImage *data_image, *mask_image; |
58 | Pixmap data_pixmap, mask_pixmap; |
59 | int clen, i; |
60 | char *x_data, *x_mask; |
61 | static XColor black = { 0, 0, 0, 0 }; |
62 | static XColor white = { 0xffff, 0xffff, 0xffff, 0xffff }; |
63 | |
64 | /* Allocate the cursor memory */ |
65 | cursor = (WMcursor *)SDL_malloc(sizeof(WMcursor)); |
66 | if ( cursor == NULL ) { |
67 | SDL_OutOfMemory(); |
68 | return(NULL); |
69 | } |
70 | |
71 | /* Mix the mask and the data */ |
72 | clen = (w/8)*h; |
73 | x_data = (char *)SDL_malloc(clen); |
74 | if ( x_data == NULL ) { |
75 | SDL_free(cursor); |
76 | SDL_OutOfMemory(); |
77 | return(NULL); |
78 | } |
79 | x_mask = (char *)SDL_malloc(clen); |
80 | if ( x_mask == NULL ) { |
81 | SDL_free(cursor); |
82 | SDL_free(x_data); |
83 | SDL_OutOfMemory(); |
84 | return(NULL); |
85 | } |
86 | for ( i=0; i<clen; ++i ) { |
87 | /* The mask is OR'd with the data to turn inverted color |
88 | pixels black since inverted color cursors aren't supported |
89 | under X11. |
90 | */ |
91 | x_mask[i] = data[i] | mask[i]; |
92 | x_data[i] = data[i]; |
93 | } |
94 | |
95 | /* Prevent the event thread from running while we use the X server */ |
96 | SDL_Lock_EventThread(); |
97 | |
98 | /* Create the data image */ |
99 | data_image = XCreateImage(SDL_Display, |
100 | DefaultVisual(SDL_Display, SDL_Screen), |
101 | 1, XYBitmap, 0, x_data, w, h, 8, w/8); |
102 | data_image->byte_order = MSBFirst; |
103 | data_image->bitmap_bit_order = MSBFirst; |
104 | data_pixmap = XCreatePixmap(SDL_Display, SDL_Root, w, h, 1); |
105 | |
106 | /* Create the data mask */ |
107 | mask_image = XCreateImage(SDL_Display, |
108 | DefaultVisual(SDL_Display, SDL_Screen), |
109 | 1, XYBitmap, 0, x_mask, w, h, 8, w/8); |
110 | mask_image->byte_order = MSBFirst; |
111 | mask_image->bitmap_bit_order = MSBFirst; |
112 | mask_pixmap = XCreatePixmap(SDL_Display, SDL_Root, w, h, 1); |
113 | |
114 | /* Create the graphics context */ |
115 | GCvalues.function = GXcopy; |
116 | GCvalues.foreground = ~0; |
117 | GCvalues.background = 0; |
118 | GCvalues.plane_mask = AllPlanes; |
119 | GCcursor = XCreateGC(SDL_Display, data_pixmap, |
120 | (GCFunction|GCForeground|GCBackground|GCPlaneMask), |
121 | &GCvalues); |
122 | |
123 | /* Blit the images to the pixmaps */ |
124 | XPutImage(SDL_Display, data_pixmap, GCcursor, data_image, |
125 | 0, 0, 0, 0, w, h); |
126 | XPutImage(SDL_Display, mask_pixmap, GCcursor, mask_image, |
127 | 0, 0, 0, 0, w, h); |
128 | XFreeGC(SDL_Display, GCcursor); |
129 | /* These free the x_data and x_mask memory pointers */ |
130 | XDestroyImage(data_image); |
131 | XDestroyImage(mask_image); |
132 | |
133 | /* Create the cursor */ |
134 | cursor->x_cursor = XCreatePixmapCursor(SDL_Display, data_pixmap, |
135 | mask_pixmap, &black, &white, hot_x, hot_y); |
136 | XFreePixmap(SDL_Display, data_pixmap); |
137 | XFreePixmap(SDL_Display, mask_pixmap); |
138 | |
139 | /* Release the event thread */ |
140 | XSync(SDL_Display, False); |
141 | SDL_Unlock_EventThread(); |
142 | |
143 | return(cursor); |
144 | } |
145 | |
146 | int X11_ShowWMCursor(_THIS, WMcursor *cursor) |
147 | { |
148 | /* Don't do anything if the display is gone */ |
149 | if ( SDL_Display == NULL ) { |
150 | return(0); |
151 | } |
152 | |
153 | /* Set the X11 cursor cursor, or blank if cursor is NULL */ |
154 | if ( SDL_Window ) { |
155 | SDL_Lock_EventThread(); |
156 | if ( cursor == NULL ) { |
157 | if ( SDL_BlankCursor != NULL ) { |
158 | XDefineCursor(SDL_Display, SDL_Window, |
159 | SDL_BlankCursor->x_cursor); |
160 | } |
161 | } else { |
162 | XDefineCursor(SDL_Display, SDL_Window, cursor->x_cursor); |
163 | } |
164 | XSync(SDL_Display, False); |
165 | SDL_Unlock_EventThread(); |
166 | } |
167 | return(1); |
168 | } |
169 | |
170 | void X11_WarpWMCursor(_THIS, Uint16 x, Uint16 y) |
171 | { |
172 | if ( using_dga & DGA_MOUSE ) { |
173 | SDL_PrivateMouseMotion(0, 0, x, y); |
174 | } else if ( mouse_relative) { |
175 | /* RJR: March 28, 2000 |
176 | leave physical cursor at center of screen if |
177 | mouse hidden and grabbed */ |
178 | SDL_PrivateMouseMotion(0, 0, x, y); |
179 | } else { |
180 | SDL_Lock_EventThread(); |
181 | XWarpPointer(SDL_Display, None, SDL_Window, 0, 0, 0, 0, x, y); |
182 | XSync(SDL_Display, False); |
183 | SDL_Unlock_EventThread(); |
184 | } |
185 | } |
186 | |
187 | /* Sets the mouse acceleration from a string of the form: |
188 | 2/1/0 |
189 | The first number is the numerator, followed by the acceleration |
190 | denumenator and threshold. |
191 | */ |
192 | static void SetMouseAccel(_THIS, const char *accel_param) |
193 | { |
194 | int i; |
195 | size_t len; |
196 | int accel_value[3]; |
197 | char *mouse_param, *mouse_param_buf, *pin; |
198 | |
199 | len = SDL_strlen(accel_param)+1; |
200 | mouse_param_buf = SDL_stack_alloc(char, len); |
201 | if ( ! mouse_param_buf ) { |
202 | return; |
203 | } |
204 | SDL_strlcpy(mouse_param_buf, accel_param, len); |
205 | mouse_param = mouse_param_buf; |
206 | |
207 | for ( i=0; (i < 3) && mouse_param; ++i ) { |
208 | pin = SDL_strchr(mouse_param, '/'); |
209 | if ( pin ) { |
210 | *pin = '\0'; |
211 | } |
212 | accel_value[i] = atoi(mouse_param); |
213 | if ( pin ) { |
214 | mouse_param = pin+1; |
215 | } else { |
216 | mouse_param = NULL; |
217 | } |
218 | } |
219 | if ( i == 3 ) { |
220 | XChangePointerControl(SDL_Display, True, True, |
221 | accel_value[0], accel_value[1], accel_value[2]); |
222 | } |
223 | SDL_stack_free(mouse_param_buf); |
224 | } |
225 | |
226 | /* Check to see if we need to enter or leave mouse relative mode */ |
227 | void X11_CheckMouseModeNoLock(_THIS) |
228 | { |
229 | const Uint8 full_focus = (SDL_APPACTIVE|SDL_APPINPUTFOCUS|SDL_APPMOUSEFOCUS); |
230 | char *env_override; |
231 | int enable_relative = 1; |
232 | |
233 | /* Allow the user to override the relative mouse mode. |
234 | They almost never want to do this, as it seriously affects |
235 | applications that rely on continuous relative mouse motion. |
236 | */ |
237 | env_override = SDL_getenv("SDL_MOUSE_RELATIVE"); |
238 | if ( env_override ) { |
239 | enable_relative = atoi(env_override); |
240 | } |
241 | |
242 | /* If the mouse is hidden and input is grabbed, we use relative mode */ |
243 | if ( enable_relative && |
244 | !(SDL_cursorstate & CURSOR_VISIBLE) && |
245 | (this->input_grab != SDL_GRAB_OFF) && |
246 | (SDL_GetAppState() & full_focus) == full_focus ) { |
247 | if ( ! mouse_relative ) { |
248 | X11_EnableDGAMouse(this); |
249 | if ( ! (using_dga & DGA_MOUSE) ) { |
250 | char *xmouse_accel; |
251 | |
252 | SDL_GetMouseState(&mouse_last.x, &mouse_last.y); |
253 | /* Use as raw mouse mickeys as possible */ |
254 | XGetPointerControl(SDL_Display, |
255 | &mouse_accel.numerator, |
256 | &mouse_accel.denominator, |
257 | &mouse_accel.threshold); |
258 | xmouse_accel=SDL_getenv("SDL_VIDEO_X11_MOUSEACCEL"); |
259 | if ( xmouse_accel ) { |
260 | SetMouseAccel(this, xmouse_accel); |
261 | } |
262 | } |
263 | mouse_relative = 1; |
264 | } |
265 | } else { |
266 | if ( mouse_relative ) { |
267 | if ( using_dga & DGA_MOUSE ) { |
268 | X11_DisableDGAMouse(this); |
269 | } else { |
270 | XChangePointerControl(SDL_Display, True, True, |
271 | mouse_accel.numerator, |
272 | mouse_accel.denominator, |
273 | mouse_accel.threshold); |
274 | } |
275 | mouse_relative = 0; |
276 | } |
277 | } |
278 | } |
279 | void X11_CheckMouseMode(_THIS) |
280 | { |
281 | SDL_Lock_EventThread(); |
282 | X11_CheckMouseModeNoLock(this); |
283 | SDL_Unlock_EventThread(); |
284 | } |