/*

SDL - Simple DirectMedia Layer

Copyright (C) 1997-2012 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"

#define WIN32_LEAN_AND_MEAN

#include <windows.h>

#include "SDL_mouse.h"

#include "../../events/SDL_events_c.h"

#include "../SDL_cursor_c.h"

#include "SDL_sysmouse_c.h"

#include "SDL_lowvideo.h"

#ifdef _WIN32_WCE

#define USE_STATIC_CURSOR

#endif

HCURSOR SDL_hcursor = NULL; /* Exported for SDL_eventloop.c */

/* The implementation dependent data for the window manager cursor */

/* For some reason when creating a windows cursor, the ands and xors memory

is not copied, so we need to keep track of it and free it when we are done

with the cursor. If we free the memory prematurely, the app crashes. :-}

*/

struct WMcursor {

};

/* Convert bits to padded bytes */

#define PAD_BITS(bits) ((bits+7)/8)

#ifdef CURSOR_DEBUG

static void PrintBITMAP(FILE *out, char *bits, int w, int h)

{

int i;

unsigned char ch;

while ( h-- > 0 ) {

for ( i=0; i<w; ++i ) {

if ( (i%8) == 0 )

ch = *bits++;

if ( ch&0x80 )

fprintf(out, "X");

else

fprintf(out, " ");

ch <<= 1;

}

fprintf(out, "\n");

}

}

#endif

#ifndef USE_STATIC_CURSOR

/* Local functions to convert the SDL cursor mask into Windows format */

static void memnot(Uint8 *dst, Uint8 *src, int len)

{

while ( len-- > 0 )

*dst++ = ~*src++;

}

static void memxor(Uint8 *dst, Uint8 *src1, Uint8 *src2, int len)

{

while ( len-- > 0 )

*dst++ = (*src1++)^(*src2++);

}

#endif /* !USE_STATIC_CURSOR */

void WIN_FreeWMCursor(_THIS, WMcursor *cursor)

{

#ifndef USE_STATIC_CURSOR

if ( cursor->curs == GetCursor() )

SetCursor(NULL);

if ( cursor->curs != NULL )

DestroyCursor(cursor->curs);

if ( cursor->ands != NULL )

SDL_free(cursor->ands);

if ( cursor->xors != NULL )

SDL_free(cursor->xors);

#endif /* !USE_STATIC_CURSOR */

SDL_free(cursor);

}

WMcursor *WIN_CreateWMCursor(_THIS,

Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y)

{

#ifdef USE_STATIC_CURSOR

WMcursor *cursor;

/* Allocate the cursor */

cursor = (WMcursor *)SDL_malloc(sizeof(*cursor));

if ( cursor ) {

cursor->curs = LoadCursor(NULL, IDC_ARROW);

}

return(cursor);

#else

WMcursor *cursor;

int allowed_x;

int allowed_y;

int run, pad, i;

Uint8 *aptr, *xptr;

/* Check to make sure the cursor size is okay */

allowed_x = GetSystemMetrics(SM_CXCURSOR);

allowed_y = GetSystemMetrics(SM_CYCURSOR);

if ( (w > allowed_x) || (h > allowed_y) ) {

SDL_SetError("Only cursors of dimension (%dx%d) are allowed",

allowed_x, allowed_y);

return(NULL);

}

/* Allocate the cursor */

cursor = (WMcursor *)SDL_malloc(sizeof(*cursor));

if ( cursor == NULL ) {

SDL_SetError("Out of memory");

return(NULL);

}

cursor->curs = NULL;

cursor->ands = NULL;

cursor->xors = NULL;

/* Pad out to the normal cursor size */

run = PAD_BITS(w);

pad = PAD_BITS(allowed_x)-run;

aptr = cursor->ands = (Uint8 *)SDL_malloc((run+pad)*allowed_y);

xptr = cursor->xors = (Uint8 *)SDL_malloc((run+pad)*allowed_y);

if ( (aptr == NULL) || (xptr == NULL) ) {

WIN_FreeWMCursor(NULL, cursor);

SDL_OutOfMemory();

return(NULL);

}

for ( i=0; i<h; ++i ) {

memxor(xptr, data, mask, run);

xptr += run;

data += run;

memnot(aptr, mask, run);

mask += run;

aptr += run;

SDL_memset(xptr, 0, pad);

xptr += pad;

SDL_memset(aptr, ~0, pad);

aptr += pad;

}

pad += run;

for ( ; i<allowed_y; ++i ) {

SDL_memset(xptr, 0, pad);

xptr += pad;

SDL_memset(aptr, ~0, pad);

aptr += pad;

}

/* Create the cursor */

cursor->curs = CreateCursor(

(HINSTANCE)GetWindowLongPtr(SDL_Window, GWLP_HINSTANCE),

hot_x, hot_y, allowed_x, allowed_y,

cursor->ands, cursor->xors);

if ( cursor->curs == NULL ) {

WIN_FreeWMCursor(NULL, cursor);

SDL_SetError("Windows couldn't create the requested cursor");

return(NULL);

}

return(cursor);

#endif /* USE_STATIC_CURSOR */

}

int WIN_ShowWMCursor(_THIS, WMcursor *cursor)

{

POINT mouse_pos;

if ( !this->screen ) {

return(0);

}

/* Set the window cursor to our cursor, if applicable */

if ( cursor != NULL ) {

SDL_hcursor = cursor->curs;

} else {

SDL_hcursor = NULL;

}

GetCursorPos(&mouse_pos);

if ( PtInRect(&SDL_bounds, mouse_pos) ) {

SetCursor(SDL_hcursor);

}

return(1);

}

void WIN_WarpWMCursor(_THIS, Uint16 x, Uint16 y)

{

if ( mouse_relative) {

/* RJR: March 28, 2000

leave physical cursor at center of screen if

mouse hidden and grabbed */

SDL_PrivateMouseMotion(0, 0, x, y);

} else {

POINT pt;

/* With DirectInput the position doesn't follow

* the cursor, so it is set manually */

if ( DINPUT() ) {

SDL_PrivateMouseMotion(0, 0, x, y);

}

pt.x = x;

pt.y = y;

ClientToScreen(SDL_Window, &pt);

SetCursorPos(pt.x, pt.y);

}

}

/* Update the current mouse state and position */

void WIN_UpdateMouse(_THIS)

{

POINT pt;

/* Always unset SDL_APPMOUSEFOCUS to give the WM_MOUSEMOVE event

* handler a chance to install a TRACKMOUSEEVENT */

SDL_PrivateAppActive(0, SDL_APPMOUSEFOCUS);

GetCursorPos(&pt);

ScreenToClient(SDL_Window, &pt);

SDL_PrivateMouseMotion(0,0, (Sint16)pt.x, (Sint16)pt.y);

}

/* Check to see if we need to enter or leave mouse relative mode */

void WIN_CheckMouseMode(_THIS)

{

#ifndef _WIN32_WCE

/* If the mouse is hidden and input is grabbed, we use relative mode */

if ( !(SDL_cursorstate & CURSOR_VISIBLE) &&

(this->input_grab != SDL_GRAB_OFF) ) {

mouse_relative = 1;

} else {

mouse_relative = 0;

}

#else

mouse_relative = 0;

#endif

}