SDL_gemmouse.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2006 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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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
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Lesser General Public License for more details.
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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
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Sam Lantinga
slouken@libsdl.org
*/
/*
* 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 */
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/*#define DEBUG_VIDEO_GEM 1*/
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#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)
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SDL_free(cursor->mform_p);
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SDL_free(cursor);
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}
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 */
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cursor = (WMcursor *)SDL_malloc(sizeof(WMcursor));
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if ( cursor == NULL ) {
SDL_OutOfMemory();
return(NULL);
}
/* Allocate mform */
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new_mform = (MFORM *)SDL_malloc(sizeof(MFORM));
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if (new_mform == NULL) {
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SDL_free(cursor);
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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;
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for (i=0;i<MAXCURHEIGHT;i++) {
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new_mform->mf_mask[i]=0;
new_mform->mf_data[i]=0;
}
if (w<=8) {
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for (i=0;i<h;i++) {
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new_mform->mf_mask[i]= mask[i]<<8;
new_mform->mf_data[i]= data[i]<<8;
}
} else {
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for (i=0;i<h;i++) {
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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];
}
}
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#ifdef DEBUG_VIDEO_GEM
for (i=0; i<h ;i++) {
printf("sdl:video:gem: cursor, line %d = 0x%04x\n", i, new_mform->mf_mask[i]);
}
printf("sdl:video:gem: CreateWMCursor(): done\n");
#endif
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return cursor;
}
int GEM_ShowWMCursor(_THIS, WMcursor *cursor)
{
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if (cursor == NULL) {
graf_mouse(M_OFF, NULL);
} else if (cursor->mform_p) {
graf_mouse(USER_DEF, cursor->mform_p);
}
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*/
#ifdef DEBUG_VIDEO_GEM
printf("sdl:video:gem: ShowWMCursor(0x%08x)\n", (long) cursor);
#endif
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return 1;
}
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#if 0
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void GEM_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
{
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/* This seems to work only on AES 3.4 (Falcon) */
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EVNTREC warpevent;
warpevent.ap_event = APPEVNT_MOUSE;
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warpevent.ap_value = (x << 16) | y;
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appl_tplay(&warpevent, 1, 1000);
}
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#endif
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void GEM_CheckMouseMode(_THIS)
{
/* If the mouse is hidden and input is grabbed, we use relative mode */
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if ( (!(SDL_cursorstate & CURSOR_VISIBLE)) &&
/*(this->input_grab != SDL_GRAB_OFF) && */ /* Damn GEM can not grab */
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(SDL_GetAppState() & SDL_APPACTIVE) ) {
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GEM_mouse_relative = SDL_TRUE;
} else {
GEM_mouse_relative = SDL_FALSE;
}
}