Mercurial > sdl-ios-xcode
annotate src/video/bwindow/SDL_sysmouse.cc @ 1023:e719ee25439d
Fix potential use of freed memory in the threaded timer system
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Tue, 04 Jan 2005 19:05:32 +0000 |
| parents | b8d311d90021 |
| children | c9b51268668f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
769
b8d311d90021
Updated copyright information for 2004 (Happy New Year!)
Sam Lantinga <slouken@libsdl.org>
parents:
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changeset
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3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 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 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
252
e8157fcb3114
Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents:
0
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changeset
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20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 #include <stdlib.h> | |
| 29 #include <string.h> | |
| 30 | |
| 31 #include <AppKit.h> | |
| 32 #include <GameKit.h> | |
| 33 | |
| 34 #include "SDL_error.h" | |
| 35 #include "SDL_BWin.h" | |
| 36 | |
| 37 extern "C" { | |
| 38 | |
| 39 #include "SDL_sysmouse_c.h" | |
| 40 | |
| 41 /* Convert bits to padded bytes */ | |
| 42 #define PADDED_BITS(bits) ((bits+7)/8) | |
| 43 | |
| 44 /* The implementation dependent data for the window manager cursor */ | |
| 45 struct WMcursor { | |
| 46 char *bits; | |
| 47 }; | |
| 48 | |
| 49 /* Can this be done in the BeOS? */ | |
| 50 WMcursor *BE_CreateWMCursor(_THIS, | |
| 51 Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y) | |
| 52 { | |
| 53 WMcursor *cursor; | |
| 54 int allowed_x; | |
| 55 int allowed_y; | |
| 56 int run, pad, i; | |
| 57 char *cptr; | |
| 58 | |
| 59 allowed_x = 16; /* BeOS limitation */ | |
| 60 allowed_y = 16; /* BeOS limitation */ | |
| 61 if ( (w > allowed_x) || (h > allowed_y) ) { | |
| 62 SDL_SetError("Only cursors of dimension (%dx%d) are allowed", | |
| 63 allowed_x, allowed_y); | |
| 64 return(NULL); | |
| 65 } | |
| 66 | |
| 67 /* Allocate the cursor */ | |
| 68 cursor = (WMcursor *)malloc(sizeof(WMcursor)); | |
| 69 if ( cursor == NULL ) { | |
| 70 SDL_OutOfMemory(); | |
| 71 return(NULL); | |
| 72 } | |
| 73 cursor->bits = (char *)malloc(4+2*((allowed_x/8)*allowed_y)); | |
| 74 if ( cursor->bits == NULL ) { | |
| 75 free(cursor); | |
| 76 SDL_OutOfMemory(); | |
| 77 return(NULL); | |
| 78 } | |
| 79 cursor->bits[0] = allowed_y; /* Size of the cursor */ | |
| 80 cursor->bits[1] = 1; /* Bit depth of cursor */ | |
| 81 cursor->bits[2] = hot_y; | |
| 82 cursor->bits[3] = hot_x; | |
| 83 cptr = &cursor->bits[4]; | |
| 84 | |
| 85 /* Pad out to the normal cursor size */ | |
| 86 run = PADDED_BITS(w); | |
| 87 pad = PADDED_BITS(allowed_x)-run; | |
| 88 for ( i=0; i<h; ++i ) { | |
| 89 memcpy(cptr, data, run); | |
| 90 memset(cptr+run, 0, pad); | |
| 91 data += run; | |
| 92 cptr += (run+pad); | |
| 93 } | |
| 94 for ( ; i<allowed_y; ++i ) { | |
| 95 memset(cptr, 0, run+pad); | |
| 96 cptr += (run+pad); | |
| 97 } | |
| 98 for ( i=0; i<h; ++i ) { | |
| 99 /* FIXME: The mask should be OR'd with the data to turn | |
| 100 inverted color pixels black, since inverted color pixels | |
| 101 aren't supported under BeOS. | |
| 102 */ | |
| 103 memcpy(cptr, mask, run); | |
| 104 memset(cptr+run, 0, pad); | |
| 105 mask += run; | |
| 106 cptr += (run+pad); | |
| 107 } | |
| 108 for ( ; i<allowed_y; ++i ) { | |
| 109 memset(cptr, 0, run+pad); | |
| 110 cptr += (run+pad); | |
| 111 } | |
| 112 return(cursor); | |
| 113 } | |
| 114 | |
| 115 int BE_ShowWMCursor(_THIS, WMcursor *cursor) | |
| 116 { | |
| 117 if ( be_app->Lock() ) { | |
| 118 if ( cursor == NULL ) { | |
| 119 if ( SDL_BlankCursor != NULL ) { | |
| 120 be_app->SetCursor(SDL_BlankCursor->bits); | |
| 121 } | |
| 122 } else { | |
| 123 be_app->SetCursor(cursor->bits); | |
| 124 } | |
| 125 be_app->Unlock(); | |
| 126 } | |
| 127 return(1); | |
| 128 } | |
| 129 | |
| 130 void BE_FreeWMCursor(_THIS, WMcursor *cursor) | |
| 131 { | |
| 132 free(cursor->bits); | |
| 133 free(cursor); | |
| 134 } | |
| 135 | |
| 136 /* Implementation by Christian Bauer <cbauer@student.physik.uni-mainz.de> */ | |
| 137 void BE_WarpWMCursor(_THIS, Uint16 x, Uint16 y) | |
| 138 { | |
| 139 BPoint pt(x, y); | |
| 140 SDL_Win->Lock(); | |
| 141 SDL_Win->ConvertToScreen(&pt); | |
| 142 SDL_Win->Unlock(); | |
| 143 set_mouse_position((int32)pt.x, (int32)pt.y); | |
| 144 } | |
| 145 | |
| 146 }; /* Extern C */ |