src/video/gem/SDL_gemmouse.c
author Patrice Mandin <patmandin@gmail.com>
Tue, 12 Sep 2006 19:34:18 +0000
branchSDL-1.2
changeset 3859 5d14acfdf84d
parent 3855 b2d9881c8c88
child 4060 0b4ebec67cad
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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#include "SDL_gemvideo.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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void GEM_FreeWMCursor(_THIS, WMcursor *cursor)
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{
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#ifdef DEBUG_VIDEO_GEM
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	printf("sdl:video:gem: free cursor\n");
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#endif
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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 *GEM_CreateWMCursor(_THIS,
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		Uint8 *data, Uint8 *mask, int w, int h, int hot_x, 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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#ifdef DEBUG_VIDEO_GEM
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	Uint16 *data1, *mask1;
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	printf("sdl:video:gem: create cursor\n");
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#endif
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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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#ifdef DEBUG_VIDEO_GEM
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		data1 = (Uint16 *) &data[i<<1];
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		mask1 = (Uint16 *) &mask[i<<1];
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		printf("sdl:video:gem: source: line %d: data=0x%04x, mask=0x%04x\n",
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			i, data1[i], mask1[i]);
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#endif
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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: data=0x%04x, mask=0x%04x\n",
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			i, new_mform->mf_data[i], 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 GEM_ShowWMCursor(_THIS, WMcursor *cursor)
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{
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	GEM_cursor = cursor;
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	if (cursor == NULL) {
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		graf_mouse(M_OFF, NULL);
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		GEM_cursor = (void *) -1;
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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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#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 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 GEM_CheckMouseMode(_THIS)
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{
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#ifdef DEBUG_VIDEO_GEM
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	printf("sdl:video:gem: check mouse mode\n");
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#endif
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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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}