usr.sbin/bhyve/bhyvegc.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
   3  *
   4  * Copyright (c) 2015 Tycho Nightingale <tycho.nightingale@pluribusnetworks.com>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __FBSDID("$FreeBSD$");
  31
  32 #include <sys/types.h>
  33
  34 #include <stdlib.h>
  35 #include <stdio.h>
  36 #include <string.h>
  37
  38 #include "bhyvegc.h"
  39
  40 struct bhyvegc {
  41         struct bhyvegc_image    *gc_image;
  42         int raw;
  43 };
  44
  45 struct bhyvegc *
  46 bhyvegc_init(int width, int height, void *fbaddr)
  47 {
  48         struct bhyvegc *gc;
  49         struct bhyvegc_image *gc_image;
  50
  51         gc = calloc(1, sizeof (struct bhyvegc));
  52
  53         gc_image = calloc(1, sizeof(struct bhyvegc_image));
  54         gc_image->width = width;
  55         gc_image->height = height;
  56         if (fbaddr) {
  57                 gc_image->data = fbaddr;
  58                 gc->raw = 1;
  59         } else {
  60                 gc_image->data = calloc(width * height, sizeof (uint32_t));
  61                 gc->raw = 0;
  62         }
  63
  64         gc->gc_image = gc_image;
  65
  66         return (gc);
  67 }
  68
  69 void
  70 bhyvegc_set_fbaddr(struct bhyvegc *gc, void *fbaddr)
  71 {
  72         gc->raw = 1;
  73         if (gc->gc_image->data && gc->gc_image->data != fbaddr)
  74                 free(gc->gc_image->data);
  75         gc->gc_image->data = fbaddr;
  76 }
  77
  78 void
  79 bhyvegc_resize(struct bhyvegc *gc, int width, int height)
  80 {
  81         struct bhyvegc_image *gc_image;
  82
  83         gc_image = gc->gc_image;
  84
  85         gc_image->width = width;
  86         gc_image->height = height;
  87         if (!gc->raw) {
  88                 gc_image->data = reallocarray(gc_image->data, width * height,
  89                     sizeof (uint32_t));
  90                 if (gc_image->data != NULL)
  91                         memset(gc_image->data, 0, width * height *
  92                             sizeof (uint32_t));
  93         }
  94 }
  95
  96 struct bhyvegc_image *
  97 bhyvegc_get_image(struct bhyvegc *gc)
  98 {
  99         if (gc == NULL)
 100                 return (NULL);
 101
 102         return (gc->gc_image);
 103 }