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Diffstat (limited to 'src/video/wincommon/SDL_sysmouse.c')
| -rw-r--r-- | src/video/wincommon/SDL_sysmouse.c | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/src/video/wincommon/SDL_sysmouse.c b/src/video/wincommon/SDL_sysmouse.c new file mode 100644 index 0000000..b53bf9c --- /dev/null +++ b/src/video/wincommon/SDL_sysmouse.c @@ -0,0 +1,259 @@ +/* + SDL - Simple DirectMedia Layer + Copyright (C) 1997-2009 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 +#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 +} |