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/* Copyright (C) 2018 Wildfire Games.
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "precompiled.h"
#include "lib/sysdep/cursor.h"
#include "lib/sysdep/gfx.h"
#include "lib/sysdep/os/win/win.h"
#include "lib/sysdep/os/win/wutil.h"
static sys_cursor cursor_from_HICON(HICON hIcon)
{
return (sys_cursor)(uintptr_t)hIcon;
}
static sys_cursor cursor_from_HCURSOR(HCURSOR hCursor)
{
return (sys_cursor)(uintptr_t)hCursor;
}
static HICON HICON_from_cursor(sys_cursor cursor)
{
return (HICON)(uintptr_t)cursor;
}
static HCURSOR HCURSOR_from_cursor(sys_cursor cursor)
{
return (HCURSOR)(uintptr_t)cursor;
}
static Status sys_cursor_create_common(int w, int h, void* bgra_img, void* mask_img, int hx, int hy, sys_cursor* cursor)
{
*cursor = 0;
// MSDN says selecting this HBITMAP into a DC is slower since we use
// CreateBitmap; bpp/format must be checked against those of the DC.
// this is the simplest way and we don't care about slight performance
// differences because this is typically only called once.
HBITMAP hbmColor = CreateBitmap(w, h, 1, 32, bgra_img);
// CreateIconIndirect doesn't access this; we just need to pass
// an empty bitmap.
HBITMAP hbmMask = CreateBitmap(w, h, 1, 1, mask_img);
// create the cursor (really an icon; they differ only in
// fIcon and the hotspot definitions).
ICONINFO ii;
ii.fIcon = FALSE; // cursor
ii.xHotspot = (DWORD)hx;
ii.yHotspot = (DWORD)hy;
ii.hbmMask = hbmMask;
ii.hbmColor = hbmColor;
HICON hIcon = CreateIconIndirect(&ii);
// CreateIconIndirect makes copies, so we no longer need these.
DeleteObject(hbmMask);
DeleteObject(hbmColor);
if(!wutil_IsValidHandle(hIcon))
WARN_RETURN(ERR::FAIL);
*cursor = cursor_from_HICON(hIcon);
return INFO::OK;
}
Status sys_cursor_create(int w, int h, void* bgra_img, int hx, int hy, sys_cursor* cursor)
{
// alpha-blended cursors do not work on a 16-bit display
// (they get drawn as a black square), so refuse to load the
// cursor in that case
int bpp = 0;
RETURN_STATUS_IF_ERR(gfx::GetVideoMode(NULL, NULL, &bpp, NULL));
if (bpp <= 16)
return ERR::FAIL;
return sys_cursor_create_common(w, h, bgra_img, NULL, hx, hy, cursor);
}
Status sys_cursor_create_empty(sys_cursor* cursor)
{
// the mask gets ignored on 32-bit displays, but is used on 16-bit displays;
// setting it to 0xFF makes the cursor invisible (though I'm not quite
// sure why it's that way round)
u8 bgra_img[] = {0, 0, 0, 0};
u8 mask_img[] = {0xFF};
return sys_cursor_create_common(1, 1, bgra_img, mask_img, 0, 0, cursor);
}
Status sys_cursor_set(sys_cursor cursor)
{
// restore default cursor.
if(!cursor)
cursor = cursor_from_HCURSOR(LoadCursor(0, IDC_ARROW));
(void)SetCursor(HCURSOR_from_cursor(cursor));
// return value (previous cursor) is useless.
return INFO::OK;
}
Status sys_cursor_free(sys_cursor cursor)
{
// bail now to prevent potential confusion below; there's nothing to do.
if(!cursor)
return INFO::OK;
// if the cursor being freed is active, restore the default arrow
// (just for safety).
if(cursor_from_HCURSOR(GetCursor()) == cursor)
WARN_IF_ERR(sys_cursor_set(0));
if(!DestroyIcon(HICON_from_cursor(cursor)))
WARN_RETURN(StatusFromWin());
return INFO::OK;
}
Status sys_cursor_reset()
{
return INFO::OK;
}
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