| 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 | } |