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 | #define WIN32_LEAN_AND_MEAN |
25 | #include <windows.h> |
26 | |
27 | #include "SDL_mouse.h" |
28 | #include "../../events/SDL_events_c.h" |
29 | #include "../SDL_cursor_c.h" |
30 | #include "SDL_sysmouse_c.h" |
31 | #include "SDL_lowvideo.h" |
32 | |
33 | #ifdef _WIN32_WCE |
34 | #define USE_STATIC_CURSOR |
35 | #endif |
36 | |
37 | HCURSOR SDL_hcursor = NULL; /* Exported for SDL_eventloop.c */ |
38 | |
39 | /* The implementation dependent data for the window manager cursor */ |
40 | /* For some reason when creating a windows cursor, the ands and xors memory |
41 | is not copied, so we need to keep track of it and free it when we are done |
42 | with the cursor. If we free the memory prematurely, the app crashes. :-} |
43 | */ |
44 | struct WMcursor { |
45 | HCURSOR curs; |
46 | #ifndef USE_STATIC_CURSOR |
47 | Uint8 *ands; |
48 | Uint8 *xors; |
49 | #endif |
50 | }; |
51 | |
52 | /* Convert bits to padded bytes */ |
53 | #define PAD_BITS(bits) ((bits+7)/8) |
54 | |
55 | #ifdef CURSOR_DEBUG |
56 | static void PrintBITMAP(FILE *out, char *bits, int w, int h) |
57 | { |
58 | int i; |
59 | unsigned char ch; |
60 | |
61 | while ( h-- > 0 ) { |
62 | for ( i=0; i<w; ++i ) { |
63 | if ( (i%8) == 0 ) |
64 | ch = *bits++; |
65 | if ( ch&0x80 ) |
66 | fprintf(out, "X"); |
67 | else |
68 | fprintf(out, " "); |
69 | ch <<= 1; |
70 | } |
71 | fprintf(out, "\n"); |
72 | } |
73 | } |
74 | #endif |
75 | |
76 | #ifndef USE_STATIC_CURSOR |
77 | /* Local functions to convert the SDL cursor mask into Windows format */ |
78 | static void memnot(Uint8 *dst, Uint8 *src, int len) |
79 | { |
80 | while ( len-- > 0 ) |
81 | *dst++ = ~*src++; |
82 | } |
83 | static void memxor(Uint8 *dst, Uint8 *src1, Uint8 *src2, int len) |
84 | { |
85 | while ( len-- > 0 ) |
86 | *dst++ = (*src1++)^(*src2++); |
87 | } |
88 | #endif /* !USE_STATIC_CURSOR */ |
89 | |
90 | void WIN_FreeWMCursor(_THIS, WMcursor *cursor) |
91 | { |
92 | #ifndef USE_STATIC_CURSOR |
93 | if ( cursor->curs == GetCursor() ) |
94 | SetCursor(NULL); |
95 | if ( cursor->curs != NULL ) |
96 | DestroyCursor(cursor->curs); |
97 | if ( cursor->ands != NULL ) |
98 | SDL_free(cursor->ands); |
99 | if ( cursor->xors != NULL ) |
100 | SDL_free(cursor->xors); |
101 | #endif /* !USE_STATIC_CURSOR */ |
102 | SDL_free(cursor); |
103 | } |
104 | |
105 | WMcursor *WIN_CreateWMCursor(_THIS, |
106 | Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y) |
107 | { |
108 | #ifdef USE_STATIC_CURSOR |
109 | WMcursor *cursor; |
110 | |
111 | /* Allocate the cursor */ |
112 | cursor = (WMcursor *)SDL_malloc(sizeof(*cursor)); |
113 | if ( cursor ) { |
114 | cursor->curs = LoadCursor(NULL, IDC_ARROW); |
115 | } |
116 | return(cursor); |
117 | #else |
118 | WMcursor *cursor; |
119 | int allowed_x; |
120 | int allowed_y; |
121 | int run, pad, i; |
122 | Uint8 *aptr, *xptr; |
123 | |
124 | /* Check to make sure the cursor size is okay */ |
125 | allowed_x = GetSystemMetrics(SM_CXCURSOR); |
126 | allowed_y = GetSystemMetrics(SM_CYCURSOR); |
127 | if ( (w > allowed_x) || (h > allowed_y) ) { |
128 | SDL_SetError("Only cursors of dimension (%dx%d) are allowed", |
129 | allowed_x, allowed_y); |
130 | return(NULL); |
131 | } |
132 | |
133 | /* Allocate the cursor */ |
134 | cursor = (WMcursor *)SDL_malloc(sizeof(*cursor)); |
135 | if ( cursor == NULL ) { |
136 | SDL_SetError("Out of memory"); |
137 | return(NULL); |
138 | } |
139 | cursor->curs = NULL; |
140 | cursor->ands = NULL; |
141 | cursor->xors = NULL; |
142 | |
143 | /* Pad out to the normal cursor size */ |
144 | run = PAD_BITS(w); |
145 | pad = PAD_BITS(allowed_x)-run; |
146 | aptr = cursor->ands = (Uint8 *)SDL_malloc((run+pad)*allowed_y); |
147 | xptr = cursor->xors = (Uint8 *)SDL_malloc((run+pad)*allowed_y); |
148 | if ( (aptr == NULL) || (xptr == NULL) ) { |
149 | WIN_FreeWMCursor(NULL, cursor); |
150 | SDL_OutOfMemory(); |
151 | return(NULL); |
152 | } |
153 | for ( i=0; i<h; ++i ) { |
154 | memxor(xptr, data, mask, run); |
155 | xptr += run; |
156 | data += run; |
157 | memnot(aptr, mask, run); |
158 | mask += run; |
159 | aptr += run; |
160 | SDL_memset(xptr, 0, pad); |
161 | xptr += pad; |
162 | SDL_memset(aptr, ~0, pad); |
163 | aptr += pad; |
164 | } |
165 | pad += run; |
166 | for ( ; i<allowed_y; ++i ) { |
167 | SDL_memset(xptr, 0, pad); |
168 | xptr += pad; |
169 | SDL_memset(aptr, ~0, pad); |
170 | aptr += pad; |
171 | } |
172 | |
173 | /* Create the cursor */ |
174 | cursor->curs = CreateCursor( |
175 | (HINSTANCE)GetWindowLongPtr(SDL_Window, GWLP_HINSTANCE), |
176 | hot_x, hot_y, allowed_x, allowed_y, |
177 | cursor->ands, cursor->xors); |
178 | if ( cursor->curs == NULL ) { |
179 | WIN_FreeWMCursor(NULL, cursor); |
180 | SDL_SetError("Windows couldn't create the requested cursor"); |
181 | return(NULL); |
182 | } |
183 | return(cursor); |
184 | #endif /* USE_STATIC_CURSOR */ |
185 | } |
186 | |
187 | int WIN_ShowWMCursor(_THIS, WMcursor *cursor) |
188 | { |
189 | POINT mouse_pos; |
190 | |
191 | if ( !this->screen ) { |
192 | return(0); |
193 | } |
194 | |
195 | /* Set the window cursor to our cursor, if applicable */ |
196 | if ( cursor != NULL ) { |
197 | SDL_hcursor = cursor->curs; |
198 | } else { |
199 | SDL_hcursor = NULL; |
200 | } |
201 | GetCursorPos(&mouse_pos); |
202 | if ( PtInRect(&SDL_bounds, mouse_pos) ) { |
203 | SetCursor(SDL_hcursor); |
204 | } |
205 | return(1); |
206 | } |
207 | |
208 | void WIN_WarpWMCursor(_THIS, Uint16 x, Uint16 y) |
209 | { |
210 | if ( mouse_relative) { |
211 | /* RJR: March 28, 2000 |
212 | leave physical cursor at center of screen if |
213 | mouse hidden and grabbed */ |
214 | SDL_PrivateMouseMotion(0, 0, x, y); |
215 | } else { |
216 | POINT pt; |
217 | |
218 | /* With DirectInput the position doesn't follow |
219 | * the cursor, so it is set manually */ |
220 | if ( DINPUT() ) { |
221 | SDL_PrivateMouseMotion(0, 0, x, y); |
222 | } |
223 | |
224 | pt.x = x; |
225 | pt.y = y; |
226 | ClientToScreen(SDL_Window, &pt); |
227 | SetCursorPos(pt.x, pt.y); |
228 | } |
229 | } |
230 | |
231 | /* Update the current mouse state and position */ |
232 | void WIN_UpdateMouse(_THIS) |
233 | { |
234 | POINT pt; |
235 | |
236 | /* Always unset SDL_APPMOUSEFOCUS to give the WM_MOUSEMOVE event |
237 | * handler a chance to install a TRACKMOUSEEVENT */ |
238 | SDL_PrivateAppActive(0, SDL_APPMOUSEFOCUS); |
239 | |
240 | GetCursorPos(&pt); |
241 | ScreenToClient(SDL_Window, &pt); |
242 | SDL_PrivateMouseMotion(0,0, (Sint16)pt.x, (Sint16)pt.y); |
243 | } |
244 | |
245 | /* Check to see if we need to enter or leave mouse relative mode */ |
246 | void WIN_CheckMouseMode(_THIS) |
247 | { |
248 | #ifndef _WIN32_WCE |
249 | /* If the mouse is hidden and input is grabbed, we use relative mode */ |
250 | if ( !(SDL_cursorstate & CURSOR_VISIBLE) && |
251 | (this->input_grab != SDL_GRAB_OFF) ) { |
252 | mouse_relative = 1; |
253 | } else { |
254 | mouse_relative = 0; |
255 | } |
256 | #else |
257 | mouse_relative = 0; |
258 | #endif |
259 | } |