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a3696c0b91
lib/sysdep: clean up by moving OS and cpu-arch folders into "os" and "arch" folders This was SVN commit r6162.
98 lines
2.4 KiB
C++
98 lines
2.4 KiB
C++
#include "precompiled.h"
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#include "lib/sysdep/cursor.h"
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#include "win.h"
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#include "wutil.h"
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static sys_cursor cursor_from_HICON(HICON hIcon)
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{
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return (sys_cursor)(uintptr_t)hIcon;
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}
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static sys_cursor cursor_from_HCURSOR(HCURSOR hCursor)
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{
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return (sys_cursor)(uintptr_t)hCursor;
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}
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static HICON HICON_from_cursor(sys_cursor cursor)
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{
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return (HICON)(uintptr_t)cursor;
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}
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static HCURSOR HCURSOR_from_cursor(sys_cursor cursor)
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{
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return (HCURSOR)(uintptr_t)cursor;
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}
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LibError sys_cursor_create(int w, int h, void* bgra_img, int hx, int hy, sys_cursor* cursor)
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{
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*cursor = 0;
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// MSDN says selecting this HBITMAP into a DC is slower since we use
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// CreateBitmap; bpp/format must be checked against those of the DC.
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// this is the simplest way and we don't care about slight performance
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// differences because this is typically only called once.
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HBITMAP hbmColour = CreateBitmap(w, h, 1, 32, bgra_img);
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// CreateIconIndirect doesn't access this; we just need to pass
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// an empty bitmap.
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HBITMAP hbmMask = CreateBitmap(w, h, 1, 1, 0);
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// create the cursor (really an icon; they differ only in
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// fIcon and the hotspot definitions).
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ICONINFO ii;
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ii.fIcon = FALSE; // cursor
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ii.xHotspot = (DWORD)hx;
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ii.yHotspot = (DWORD)hy;
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ii.hbmMask = hbmMask;
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ii.hbmColor = hbmColour;
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HICON hIcon = CreateIconIndirect(&ii);
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// CreateIconIndirect makes copies, so we no longer need these.
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DeleteObject(hbmMask);
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DeleteObject(hbmColour);
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if(!wutil_IsValidHandle(hIcon))
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WARN_RETURN(ERR::FAIL);
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*cursor = cursor_from_HICON(hIcon);
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return INFO::OK;
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}
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LibError sys_cursor_create_empty(sys_cursor* cursor)
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{
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u8 bgra_img[] = {0, 0, 0, 0};
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return sys_cursor_create(1, 1, bgra_img, 0, 0, cursor);
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}
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LibError sys_cursor_set(sys_cursor cursor)
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{
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// restore default cursor.
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if(!cursor)
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cursor = cursor_from_HCURSOR(LoadCursor(0, MAKEINTRESOURCE(IDC_ARROW)));
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(void)SetCursor(HCURSOR_from_cursor(cursor));
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// return value (previous cursor) is useless.
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return INFO::OK;
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}
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LibError sys_cursor_free(sys_cursor cursor)
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{
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// bail now to prevent potential confusion below; there's nothing to do.
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if(!cursor)
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return INFO::OK;
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// if the cursor being freed is active, restore the default arrow
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// (just for safety).
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if(cursor_from_HCURSOR(GetCursor()) == cursor)
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WARN_ERR(sys_cursor_set(0));
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BOOL ok = DestroyIcon(HICON_from_cursor(cursor));
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return LibError_from_win32(ok);
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}
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