| /* |
| SDL - Simple DirectMedia Layer |
| Copyright (C) 1997-2012 Sam Lantinga |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with this library; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| |
| Sam Lantinga |
| slouken@libsdl.org |
| */ |
| #include "SDL_config.h" |
| |
| #define WIN32_LEAN_AND_MEAN 1 |
| #include <windows.h> |
| |
| #include "SDL_mouse.h" |
| #include "../../events/SDL_events_c.h" |
| #include "../SDL_cursor_c.h" |
| #include "SDL_sysmouse_c.h" |
| #include "SDL_lowvideo.h" |
| |
| #ifdef _WIN32_WCE |
| #define USE_STATIC_CURSOR |
| #endif |
| |
| HCURSOR SDL_hcursor = NULL; /* Exported for SDL_eventloop.c */ |
| |
| /* The implementation dependent data for the window manager cursor */ |
| /* For some reason when creating a windows cursor, the ands and xors memory |
| is not copied, so we need to keep track of it and free it when we are done |
| with the cursor. If we free the memory prematurely, the app crashes. :-} |
| */ |
| struct WMcursor { |
| HCURSOR curs; |
| #ifndef USE_STATIC_CURSOR |
| Uint8 *ands; |
| Uint8 *xors; |
| #endif |
| }; |
| |
| /* Convert bits to padded bytes */ |
| #define PAD_BITS(bits) ((bits+7)/8) |
| |
| #ifdef CURSOR_DEBUG |
| static void PrintBITMAP(FILE *out, char *bits, int w, int h) |
| { |
| int i; |
| unsigned char ch; |
| |
| while ( h-- > 0 ) { |
| for ( i=0; i<w; ++i ) { |
| if ( (i%8) == 0 ) |
| ch = *bits++; |
| if ( ch&0x80 ) |
| fprintf(out, "X"); |
| else |
| fprintf(out, " "); |
| ch <<= 1; |
| } |
| fprintf(out, "\n"); |
| } |
| } |
| #endif |
| |
| #ifndef USE_STATIC_CURSOR |
| /* Local functions to convert the SDL cursor mask into Windows format */ |
| static void memnot(Uint8 *dst, Uint8 *src, int len) |
| { |
| while ( len-- > 0 ) |
| *dst++ = ~*src++; |
| } |
| static void memxor(Uint8 *dst, Uint8 *src1, Uint8 *src2, int len) |
| { |
| while ( len-- > 0 ) |
| *dst++ = (*src1++)^(*src2++); |
| } |
| #endif /* !USE_STATIC_CURSOR */ |
| |
| void WIN_FreeWMCursor(_THIS, WMcursor *cursor) |
| { |
| #ifndef USE_STATIC_CURSOR |
| if ( cursor->curs == GetCursor() ) |
| SetCursor(NULL); |
| if ( cursor->curs != NULL ) |
| DestroyCursor(cursor->curs); |
| if ( cursor->ands != NULL ) |
| SDL_free(cursor->ands); |
| if ( cursor->xors != NULL ) |
| SDL_free(cursor->xors); |
| #endif /* !USE_STATIC_CURSOR */ |
| SDL_free(cursor); |
| } |
| |
| WMcursor *WIN_CreateWMCursor(_THIS, |
| Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y) |
| { |
| #ifdef USE_STATIC_CURSOR |
| WMcursor *cursor; |
| |
| /* Allocate the cursor */ |
| cursor = (WMcursor *)SDL_malloc(sizeof(*cursor)); |
| if ( cursor ) { |
| cursor->curs = LoadCursor(NULL, IDC_ARROW); |
| } |
| return(cursor); |
| #else |
| WMcursor *cursor; |
| int allowed_x; |
| int allowed_y; |
| int run, pad, i; |
| Uint8 *aptr, *xptr; |
| |
| /* Check to make sure the cursor size is okay */ |
| allowed_x = GetSystemMetrics(SM_CXCURSOR); |
| allowed_y = GetSystemMetrics(SM_CYCURSOR); |
| if ( (w > allowed_x) || (h > allowed_y) ) { |
| SDL_SetError("Only cursors of dimension (%dx%d) are allowed", |
| allowed_x, allowed_y); |
| return(NULL); |
| } |
| |
| /* Allocate the cursor */ |
| cursor = (WMcursor *)SDL_malloc(sizeof(*cursor)); |
| if ( cursor == NULL ) { |
| SDL_SetError("Out of memory"); |
| return(NULL); |
| } |
| cursor->curs = NULL; |
| cursor->ands = NULL; |
| cursor->xors = NULL; |
| |
| /* Pad out to the normal cursor size */ |
| run = PAD_BITS(w); |
| pad = PAD_BITS(allowed_x)-run; |
| aptr = cursor->ands = (Uint8 *)SDL_malloc((run+pad)*allowed_y); |
| xptr = cursor->xors = (Uint8 *)SDL_malloc((run+pad)*allowed_y); |
| if ( (aptr == NULL) || (xptr == NULL) ) { |
| WIN_FreeWMCursor(NULL, cursor); |
| SDL_OutOfMemory(); |
| return(NULL); |
| } |
| for ( i=0; i<h; ++i ) { |
| memxor(xptr, data, mask, run); |
| xptr += run; |
| data += run; |
| memnot(aptr, mask, run); |
| mask += run; |
| aptr += run; |
| SDL_memset(xptr, 0, pad); |
| xptr += pad; |
| SDL_memset(aptr, ~0, pad); |
| aptr += pad; |
| } |
| pad += run; |
| for ( ; i<allowed_y; ++i ) { |
| SDL_memset(xptr, 0, pad); |
| xptr += pad; |
| SDL_memset(aptr, ~0, pad); |
| aptr += pad; |
| } |
| |
| /* Create the cursor */ |
| cursor->curs = CreateCursor( |
| (HINSTANCE)GetWindowLongPtr(SDL_Window, GWLP_HINSTANCE), |
| hot_x, hot_y, allowed_x, allowed_y, |
| cursor->ands, cursor->xors); |
| if ( cursor->curs == NULL ) { |
| WIN_FreeWMCursor(NULL, cursor); |
| SDL_SetError("Windows couldn't create the requested cursor"); |
| return(NULL); |
| } |
| return(cursor); |
| #endif /* USE_STATIC_CURSOR */ |
| } |
| |
| int WIN_ShowWMCursor(_THIS, WMcursor *cursor) |
| { |
| POINT mouse_pos; |
| |
| if ( !this->screen ) { |
| return(0); |
| } |
| |
| /* Set the window cursor to our cursor, if applicable */ |
| if ( cursor != NULL ) { |
| SDL_hcursor = cursor->curs; |
| } else { |
| SDL_hcursor = NULL; |
| } |
| GetCursorPos(&mouse_pos); |
| if ( PtInRect(&SDL_bounds, mouse_pos) ) { |
| SetCursor(SDL_hcursor); |
| } |
| return(1); |
| } |
| |
| void WIN_WarpWMCursor(_THIS, Uint16 x, Uint16 y) |
| { |
| if ( mouse_relative) { |
| /* RJR: March 28, 2000 |
| leave physical cursor at center of screen if |
| mouse hidden and grabbed */ |
| SDL_PrivateMouseMotion(0, 0, x, y); |
| } else { |
| POINT pt; |
| |
| /* With DirectInput the position doesn't follow |
| * the cursor, so it is set manually */ |
| if ( DINPUT() ) { |
| SDL_PrivateMouseMotion(0, 0, x, y); |
| } |
| |
| pt.x = x; |
| pt.y = y; |
| ClientToScreen(SDL_Window, &pt); |
| SetCursorPos(pt.x, pt.y); |
| } |
| } |
| |
| /* Update the current mouse state and position */ |
| void WIN_UpdateMouse(_THIS) |
| { |
| POINT pt; |
| |
| /* Always unset SDL_APPMOUSEFOCUS to give the WM_MOUSEMOVE event |
| * handler a chance to install a TRACKMOUSEEVENT */ |
| SDL_PrivateAppActive(0, SDL_APPMOUSEFOCUS); |
| |
| GetCursorPos(&pt); |
| ScreenToClient(SDL_Window, &pt); |
| SDL_PrivateMouseMotion(0,0, (Sint16)pt.x, (Sint16)pt.y); |
| } |
| |
| /* Check to see if we need to enter or leave mouse relative mode */ |
| void WIN_CheckMouseMode(_THIS) |
| { |
| #ifndef _WIN32_WCE |
| /* If the mouse is hidden and input is grabbed, we use relative mode */ |
| if ( !(SDL_cursorstate & CURSOR_VISIBLE) && |
| (this->input_grab != SDL_GRAB_OFF) ) { |
| mouse_relative = 1; |
| } else { |
| mouse_relative = 0; |
| } |
| #else |
| mouse_relative = 0; |
| #endif |
| } |