src/video/gem/SDL_gemmouse.c
author Patrice Mandin <patmandin@gmail.com>
Tue, 12 Sep 2006 19:47:40 +0000
changeset 2025 7312feb88dad
parent 2020 091bb215baf9
child 2189 f54670a477bb
permissions -rw-r--r--
Allow grabing mouse by locking its position
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/*
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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,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    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
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#include "SDL_config.h"
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/*
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 *	GEM Mouse manager
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 *
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 *	Patrice Mandin
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 */
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#include <gem.h>
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#include "SDL_mouse.h"
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#include "../../events/SDL_events_c.h"
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#include "../SDL_cursor_c.h"
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#include "SDL_gemmouse_c.h"
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/* Defines */
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/*#define DEBUG_VIDEO_GEM 1*/
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#define MAXCURWIDTH 16
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#define MAXCURHEIGHT 16
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/* The implementation dependent data for the window manager cursor */
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struct WMcursor
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{
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    MFORM *mform_p;
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};
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void
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GEM_FreeWMCursor(_THIS, WMcursor * cursor)
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{
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    if (cursor == NULL)
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        return;
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    graf_mouse(ARROW, NULL);
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    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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}
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WMcursor *
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GEM_CreateWMCursor(_THIS,
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                   Uint8 * data, Uint8 * mask, int w, int h, int hot_x,
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                   int hot_y)
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{
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    WMcursor *cursor;
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    MFORM *new_mform;
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    int i;
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    /* Check the size */
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    if ((w > MAXCURWIDTH) || (h > MAXCURHEIGHT)) {
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        SDL_SetError("Only cursors of dimension (%dx%d) are allowed",
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                     MAXCURWIDTH, MAXCURHEIGHT);
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        return (NULL);
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    }
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    /* Allocate the cursor memory */
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    cursor = (WMcursor *) SDL_malloc(sizeof(WMcursor));
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    if (cursor == NULL) {
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        SDL_OutOfMemory();
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        return (NULL);
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    }
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    /* 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();
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        return (NULL);
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    }
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    cursor->mform_p = new_mform;
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    new_mform->mf_xhot = hot_x;
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    new_mform->mf_yhot = hot_y;
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    new_mform->mf_nplanes = 1;
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    new_mform->mf_fg = 0;
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    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;
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        new_mform->mf_data[i] = 0;
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    }
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    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;
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            new_mform->mf_data[i] = data[i] << 8;
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        }
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    } 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];
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            new_mform->mf_data[i] = data[i << 1] << 8 | data[(i << 1) + 1];
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        }
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    }
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#ifdef DEBUG_VIDEO_GEM
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    for (i = 0; i < h; i++) {
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        printf("sdl:video:gem: cursor, line %d = 0x%04x\n", i,
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               new_mform->mf_mask[i]);
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    }
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    printf("sdl:video:gem: CreateWMCursor(): done\n");
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#endif
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    return cursor;
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}
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int
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GEM_ShowWMCursor(_THIS, WMcursor * cursor)
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{
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/*
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	if (cursor == NULL) {
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		graf_mouse(M_OFF, NULL);
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	} else if (cursor->mform_p) {
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		graf_mouse(USER_DEF, cursor->mform_p);
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	}
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*/
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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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#endif
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    return 1;
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}
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#if 0
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void
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GEM_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
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{
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    /* This seems to work only on AES 3.4 (Falcon) */
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    EVNTREC warpevent;
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    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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}
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#endif
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void
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GEM_CheckMouseMode(_THIS)
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{
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    /* If the mouse is hidden and input is grabbed, we use relative mode */
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    if ((!(SDL_cursorstate & CURSOR_VISIBLE)) &&
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        (this->input_grab != SDL_GRAB_OFF) &&
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        (SDL_GetAppState() & SDL_APPACTIVE)) {
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        SDL_AtariXbios_LockMousePosition(SDL_TRUE);
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        GEM_mouse_relative = SDL_TRUE;
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    } else {
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        SDL_AtariXbios_LockMousePosition(SDL_FALSE);
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        GEM_mouse_relative = SDL_FALSE;
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        graf_mouse(M_ON, NULL);
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    }
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}
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/* vi: set ts=4 sw=4 expandtab: */