SDL_gemmouse.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002 Sam Lantinga
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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 =
"@(#) $Id$";
#endif
/*
* GEM Mouse manager
*
* Patrice Mandin
*/
#include <stdlib.h>
#include <gem.h>
#include "SDL_error.h"
#include "SDL_mouse.h"
#include "SDL_events_c.h"
#include "SDL_cursor_c.h"
#include "SDL_gemmouse_c.h"
/* Defines */
#define MAXCURWIDTH 16
#define MAXCURHEIGHT 16
/* The implementation dependent data for the window manager cursor */
struct WMcursor {
MFORM *mform_p;
};
void GEM_FreeWMCursor(_THIS, WMcursor *cursor)
{
if (cursor == NULL)
return;
graf_mouse(ARROW, NULL);
if (cursor->mform_p != NULL)
free(cursor->mform_p);
free(cursor);
}
WMcursor *GEM_CreateWMCursor(_THIS,
Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y)
{
WMcursor *cursor;
MFORM *new_mform;
int i;
/* Check the size */
if ( (w > MAXCURWIDTH) || (h > MAXCURHEIGHT) ) {
SDL_SetError("Only cursors of dimension (%dx%d) are allowed",
MAXCURWIDTH, MAXCURHEIGHT);
return(NULL);
}
/* Allocate the cursor memory */
cursor = (WMcursor *)malloc(sizeof(WMcursor));
if ( cursor == NULL ) {
SDL_OutOfMemory();
return(NULL);
}
/* Allocate mform */
new_mform = (MFORM *)malloc(sizeof(MFORM));
if (new_mform == NULL) {
free(cursor);
SDL_OutOfMemory();
return(NULL);
}
cursor->mform_p = new_mform;
new_mform->mf_xhot = hot_x;
new_mform->mf_yhot = hot_y;
new_mform->mf_nplanes = 1;
new_mform->mf_fg = 0;
new_mform->mf_bg = 1;
for (i=0;i<MAXCURHEIGHT;i++)
{
new_mform->mf_mask[i]=0;
new_mform->mf_data[i]=0;
}
if (w<=8) {
for (i=0;i<h;i++)
{
new_mform->mf_mask[i]= mask[i]<<8;
new_mform->mf_data[i]= data[i]<<8;
}
} else {
for (i=0;i<h;i++)
{
new_mform->mf_mask[i]= mask[i<<1]<<8 | mask[(i<<1)+1];
new_mform->mf_data[i]= data[i<<1]<<8 | data[(i<<1)+1];
}
}
return cursor;
}
int GEM_ShowWMCursor(_THIS, WMcursor *cursor)
{
if (cursor == NULL) {
graf_mouse(M_OFF, NULL);
} else if (cursor->mform_p) {
graf_mouse(USER_DEF, cursor->mform_p);
}
return 1;
}
void GEM_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
{
EVNTREC warpevent;
warpevent.ap_event = APPEVNT_MOUSE;
warpevent.ap_value = (y << 16) | x;
appl_tplay(&warpevent, 1, 1000);
}
void GEM_CheckMouseMode(_THIS)
{
/* If the mouse is hidden and input is grabbed, we use relative mode */
if ( !(SDL_cursorstate & CURSOR_VISIBLE) &&
(this->input_grab != SDL_GRAB_OFF) ) {
GEM_mouse_relative = SDL_TRUE;
} else {
GEM_mouse_relative = SDL_FALSE;
}
}