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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
*/
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#include "SDL_config.h"
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/*
* GEM Mouse manager
*
* Patrice Mandin
*/
#include <gem.h>
#include "SDL_mouse.h"
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#include "../../events/SDL_events_c.h"
#include "../SDL_cursor_c.h"
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#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
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/* The implementation dependent data for the window manager cursor */
struct WMcursor
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MFORM *mform_p;
};
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void
GEM_FreeWMCursor(_THIS, WMcursor * cursor)
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if (cursor == NULL)
return;
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graf_mouse(ARROW, NULL);
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if (cursor->mform_p != NULL)
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 */
cursor = (WMcursor *) SDL_malloc(sizeof(WMcursor));
if (cursor == NULL) {
SDL_OutOfMemory();
return (NULL);
}
/* Allocate mform */
new_mform = (MFORM *) SDL_malloc(sizeof(MFORM));
if (new_mform == NULL) {
SDL_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];
}
}
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#ifdef DEBUG_VIDEO_GEM
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for (i = 0; i < h; i++) {
printf("sdl:video:gem: cursor, line %d = 0x%04x\n", i,
new_mform->mf_mask[i]);
}
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printf("sdl:video:gem: CreateWMCursor(): done\n");
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return cursor;
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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
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printf("sdl:video:gem: ShowWMCursor(0x%08x)\n", (long) cursor);
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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) */
EVNTREC warpevent;
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warpevent.ap_event = APPEVNT_MOUSE;
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)
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/* If the mouse is hidden and input is grabbed, we use relative mode */
if ((!(SDL_cursorstate & CURSOR_VISIBLE)) &&
/*(this->input_grab != SDL_GRAB_OFF) && *//* Damn GEM can not grab */
(SDL_GetAppState() & SDL_APPACTIVE)) {
GEM_mouse_relative = SDL_TRUE;
} else {
GEM_mouse_relative = SDL_FALSE;
}
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/* vi: set ts=4 sw=4 expandtab: */