text: /*
      SDL - Simple DirectMedia Layer
      Copyright (C) 1997-2009 Sam Lantinga
  
      This library is free software; you can redistribute it and/or
      modify it under the terms of the GNU Lesser General Public
      License as published by the Free Software Foundation; either
      version 2.1 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
      Lesser General Public License for more details.
  
      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
  
      Sam Lantinga
      slouken@libsdl.org
  */
  #include "SDL_config.h"
  
  /*
   *	GEM Mouse manager
   *
   *	Patrice Mandin
   */
  
  #include <gem.h>
  
  #include "SDL_mouse.h"
  #include "../../events/SDL_events_c.h"
  #include "../SDL_cursor_c.h"
  #include "SDL_gemmouse_c.h"
  #include "SDL_gemvideo.h"
  
  /* Defines */
  
  /*#define DEBUG_VIDEO_GEM 1*/
  
  #define MAXCURWIDTH 16
  #define MAXCURHEIGHT 16
  
  void GEM_FreeWMCursor(_THIS, WMcursor *cursor)
  {
  #ifdef DEBUG_VIDEO_GEM
  	printf("sdl:video:gem: free cursor\n");
  #endif
  
  	if (cursor == NULL)
  		return;
  	
  	graf_mouse(ARROW, NULL);
  
  	if (cursor->mform_p != NULL)
  		SDL_free(cursor->mform_p);
  
  	SDL_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;
  
  #ifdef DEBUG_VIDEO_GEM
  	Uint16 *data1, *mask1;
  
  	printf("sdl:video:gem: create cursor\n");
  #endif
  
  	/* 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;
  #ifdef DEBUG_VIDEO_GEM
  		data1 = (Uint16 *) &data[i<<1];
  		mask1 = (Uint16 *) &mask[i<<1];
  		printf("sdl:video:gem: source: line %d: data=0x%04x, mask=0x%04x\n",
  			i, data1[i], mask1[i]);
  #endif
  	}
  
  	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];
  		}
  	}
  
  #ifdef DEBUG_VIDEO_GEM
  	for (i=0; i<h ;i++) {
  		printf("sdl:video:gem: cursor: line %d: data=0x%04x, mask=0x%04x\n",
  			i, new_mform->mf_data[i], new_mform->mf_mask[i]);
  	}
  
  	printf("sdl:video:gem: CreateWMCursor(): done\n");
  #endif
  
  	return cursor;
  }
  
  int GEM_ShowWMCursor(_THIS, WMcursor *cursor)
  {
  	GEM_cursor = cursor;
  
  	GEM_CheckMouseMode(this);
  
  #ifdef DEBUG_VIDEO_GEM
  	printf("sdl:video:gem: ShowWMCursor(0x%08x)\n", (long) cursor);
  #endif
  
  	return 1;
  }
  
  #if 0
  void GEM_WarpWMCursor(_THIS, Uint16 x, Uint16 y)
  {
  	/* This seems to work only on AES 3.4 (Falcon) */
  
  	EVNTREC	warpevent;
  	
  	warpevent.ap_event = APPEVNT_MOUSE; 
  	warpevent.ap_value = (x << 16) | y;
  
  	appl_tplay(&warpevent, 1, 1000);
  }
  #endif
  
  void GEM_CheckMouseMode(_THIS)
  {
  	const Uint8 full_focus = (SDL_APPACTIVE|SDL_APPINPUTFOCUS|SDL_APPMOUSEFOCUS);
  	int set_system_cursor = 1, show_system_cursor = 1;
  
  #ifdef DEBUG_VIDEO_GEM
  	printf("sdl:video:gem: check mouse mode\n");
  #endif
  
  	/* If the mouse is hidden and input is grabbed, we use relative mode */
  	GEM_mouse_relative = (!(SDL_cursorstate & CURSOR_VISIBLE))
  		&& (this->input_grab != SDL_GRAB_OFF)
  		&& (SDL_GetAppState() & SDL_APPACTIVE);
  	SDL_AtariXbios_LockMousePosition(GEM_mouse_relative);
  
  	if (SDL_cursorstate & CURSOR_VISIBLE) {
  		/* Application defined cursor only over the application window */
  		if ((SDL_GetAppState() & full_focus) == full_focus) {
  			if (GEM_cursor) {
  				graf_mouse(USER_DEF, GEM_cursor->mform_p);
  				set_system_cursor = 0;
  			} else {
  				show_system_cursor = 0;
  			}
  		}
  	} else {
  		/* Mouse cursor hidden only over the application window */
  		if ((SDL_GetAppState() & full_focus) == full_focus) {
  			set_system_cursor = 0;
  			show_system_cursor = 0;
  		}
  	}
  
  	graf_mouse(show_system_cursor ? M_ON : M_OFF, NULL);
  	if (set_system_cursor) {
  		graf_mouse(ARROW, NULL);
  	}
  }
  