SDL_sysmouse.cc
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上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:4k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /*
- SDL - Simple DirectMedia Layer
- Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
- This library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Library General Public
- License as published by the Free Software Foundation; either
- version 2 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
- Library General Public License for more details.
- You should have received a copy of the GNU Library General Public
- License along with this library; if not, write to the Free
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- Sam Lantinga
- slouken@libsdl.org
- */
- #ifdef SAVE_RCSID
- static char rcsid =
- "@(#) $Id: SDL_sysmouse.cc,v 1.4 2002/04/22 21:38:04 wmay Exp $";
- #endif
- #include <stdlib.h>
- #include <string.h>
- #include <AppKit.h>
- #include <GameKit.h>
- #include "SDL_error.h"
- #include "SDL_BWin.h"
- extern "C" {
- #include "SDL_sysmouse_c.h"
- /* Convert bits to padded bytes */
- #define PADDED_BITS(bits) ((bits+7)/8)
- /* The implementation dependent data for the window manager cursor */
- struct WMcursor {
- char *bits;
- };
- /* Can this be done in the BeOS? */
- WMcursor *BE_CreateWMCursor(_THIS,
- Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y)
- {
- WMcursor *cursor;
- int allowed_x;
- int allowed_y;
- int run, pad, i;
- char *cptr;
- allowed_x = 16; /* BeOS limitation */
- allowed_y = 16; /* BeOS limitation */
- 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 *)malloc(sizeof(WMcursor));
- if ( cursor == NULL ) {
- SDL_OutOfMemory();
- return(NULL);
- }
- cursor->bits = (char *)malloc(4+2*((allowed_x/8)*allowed_y));
- if ( cursor->bits == NULL ) {
- free(cursor);
- SDL_OutOfMemory();
- return(NULL);
- }
- cursor->bits[0] = allowed_y; /* Size of the cursor */
- cursor->bits[1] = 1; /* Bit depth of cursor */
- cursor->bits[2] = hot_y;
- cursor->bits[3] = hot_x;
- cptr = &cursor->bits[4];
- /* Pad out to the normal cursor size */
- run = PADDED_BITS(w);
- pad = PADDED_BITS(allowed_x)-run;
- for ( i=0; i<h; ++i ) {
- memcpy(cptr, data, run);
- memset(cptr+run, 0, pad);
- data += run;
- cptr += (run+pad);
- }
- for ( ; i<allowed_y; ++i ) {
- memset(cptr, 0, run+pad);
- cptr += (run+pad);
- }
- for ( i=0; i<h; ++i ) {
- /* FIXME: The mask should be OR'd with the data to turn
- inverted color pixels black, since inverted color pixels
- aren't supported under BeOS.
- */
- memcpy(cptr, mask, run);
- memset(cptr+run, 0, pad);
- mask += run;
- cptr += (run+pad);
- }
- for ( ; i<allowed_y; ++i ) {
- memset(cptr, 0, run+pad);
- cptr += (run+pad);
- }
- return(cursor);
- }
- int BE_ShowWMCursor(_THIS, WMcursor *cursor)
- {
- if ( be_app->Lock() ) {
- if ( cursor == NULL ) {
- if ( SDL_BlankCursor != NULL ) {
- be_app->SetCursor(SDL_BlankCursor->bits);
- }
- } else {
- be_app->SetCursor(cursor->bits);
- }
- be_app->Unlock();
- }
- return(1);
- }
- void BE_FreeWMCursor(_THIS, WMcursor *cursor)
- {
- free(cursor->bits);
- free(cursor);
- }
- /* Implementation by Christian Bauer <cbauer@student.physik.uni-mainz.de> */
- void BE_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
- {
- BPoint pt(x, y);
- SDL_Win->Lock();
- SDL_Win->ConvertToScreen(&pt);
- SDL_Win->Unlock();
- set_mouse_position((int32)pt.x, (int32)pt.y);
- }
- }; /* Extern C */