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 (at) 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 } 260
