cursor-win.c

/*
 * CDDL HEADER START
 *
 * This file and its contents are supplied under the terms of the
 * Common Development and Distribution License ("CDDL"), version 1.0.
 * You may only use this file in accordance with the terms of version
 * 1.0 of the CDDL.
 *
 * A full copy of the text of the CDDL should have accompanied this
 * source.  A copy of the CDDL is also available via the Internet at
 * http://www.illumos.org/license/CDDL.
 *
 * CDDL HEADER END
*/
/*
 * Copyright 2020 Saso Kiselkov. All rights reserved.
 */
 
#include <windows.h>
 
#include "acfutils/cursor.h"
#include "acfutils/helpers.h"
#include "acfutils/safe_alloc.h"
 
struct cursor_s {
    HCURSOR     crs;
};
 
cursor_t *
cursor_read_from_file(const char *filename_png)
{
    cursor_t *cursor = safe_calloc(1, sizeof (*cursor));
    char *filename_cur, *extension;
 
    ASSERT(filename_png != NULL);
 
    /*
     * On Windows, we need to grab a cursor file (.cur), so substitute
     * the path extension in the filename.
     */
    filename_cur = safe_calloc(1, strlen(filename_png) + 8);
    strlcpy(filename_cur, filename_png, strlen(filename_png) + 8);
    extension = strrchr(filename_cur, '.');
    if (extension != NULL)
        strlcpy(extension, ".cur", 8);
    else
        strlcpy(&filename_cur[strlen(filename_cur)], ".cur", 8);
    cursor->crs = LoadCursorFromFileA(filename_cur);
    if (cursor->crs == NULL) {
        win_perror(GetLastError(), "Error loading cursor file %s",
            filename_cur);
        free(cursor);
        free(filename_cur);
        return (NULL);
    }
    free(filename_cur);
 
    return (cursor);
}
 
void
cursor_free(cursor_t *cursor)
{
    if (cursor == NULL)
        return;
    ASSERT(cursor->crs != NULL);
    DestroyCursor(cursor->crs);
    free(cursor);
}
 
void
cursor_make_current(cursor_t *cursor)
{
    ASSERT(cursor != NULL);
    ASSERT(cursor->crs != NULL);
    SetCursor(cursor->crs);
}