VirtualBox

source: vbox/trunk/src/VBox/Additions/x11/vboxvideo/getmode.c

Last change on this file was 98103, checked in by vboxsync, 16 months ago

Copyright year updates by scm.
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File size: 11.5 KB
Line 
1/* $Id: getmode.c 98103 2023-01-17 14:15:46Z vboxsync $ */
2/** @file
3 * VirtualBox X11 Additions graphics driver dynamic video mode functions.
4 */
5
6/*
7 * Copyright (C) 2006-2023 Oracle and/or its affiliates.
8 *
9 * Permission is hereby granted, free of charge, to any person
10 * obtaining a copy of this software and associated documentation
11 * files (the "Software"), to deal in the Software without
12 * restriction, including without limitation the rights to use,
13 * copy, modify, merge, publish, distribute, sublicense, and/or sell
14 * copies of the Software, and to permit persons to whom the
15 * Software is furnished to do so, subject to the following
16 * conditions:
17 *
18 * The above copyright notice and this permission notice shall be
19 * included in all copies or substantial portions of the Software.
20 *
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
23 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
24 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
25 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
26 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
27 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
28 * OTHER DEALINGS IN THE SOFTWARE.
29 */
30
31#include "vboxvideo.h"
32
33#define NEED_XF86_TYPES
34#include "xf86.h"
35
36#ifdef XORG_7X
37# include <stdio.h>
38# include <stdlib.h>
39# include <string.h>
40#endif
41
42#ifdef VBOXVIDEO_13
43# ifdef RT_OS_LINUX
44# include <linux/input.h>
45# ifndef EVIOCGRAB
46# define EVIOCGRAB _IOW('E', 0x90, int)
47# endif
48# ifndef KEY_SWITCHVIDEOMODE
49# define KEY_SWITCHVIDEOMODE 227
50# endif
51# include <dirent.h>
52# include <errno.h>
53# include <fcntl.h>
54# include <unistd.h>
55# endif /* RT_OS_LINUX */
56#endif /* VBOXVIDEO_13 */
57
58/**************************************************************************
59* Main functions *
60**************************************************************************/
61
62/**
63 * Fills a display mode M with a built-in mode of name pszName and dimensions
64 * cx and cy.
65 */
66static void vboxFillDisplayMode(ScrnInfoPtr pScrn, DisplayModePtr m,
67 const char *pszName, unsigned cx, unsigned cy)
68{
69 VBOXPtr pVBox = pScrn->driverPrivate;
70 char szName[256];
71 DisplayModePtr pPrev = m->prev;
72 DisplayModePtr pNext = m->next;
73
74 if (!pszName)
75 {
76 sprintf(szName, "%ux%u", cx, cy);
77 pszName = szName;
78 }
79 TRACE_LOG("pszName=%s, cx=%u, cy=%u\n", pszName, cx, cy);
80 if (m->name)
81 free((void*)m->name);
82 memset(m, '\0', sizeof(*m));
83 m->prev = pPrev;
84 m->next = pNext;
85 m->status = MODE_OK;
86 m->type = M_T_BUILTIN;
87 /* Older versions of VBox only support screen widths which are a multiple
88 * of 8 */
89 if (pVBox->fAnyX)
90 m->HDisplay = cx;
91 else
92 m->HDisplay = cx & ~7;
93 m->HSyncStart = m->HDisplay + 2;
94 m->HSyncEnd = m->HDisplay + 4;
95 m->HTotal = m->HDisplay + 6;
96 m->VDisplay = cy;
97 m->VSyncStart = m->VDisplay + 2;
98 m->VSyncEnd = m->VDisplay + 4;
99 m->VTotal = m->VDisplay + 6;
100 m->Clock = m->HTotal * m->VTotal * 60 / 1000; /* kHz */
101 m->name = xnfstrdup(pszName);
102}
103
104/**
105 * Allocates an empty display mode and links it into the doubly linked list of
106 * modes pointed to by pScrn->modes. Returns a pointer to the newly allocated
107 * memory.
108 */
109static DisplayModePtr vboxAddEmptyScreenMode(ScrnInfoPtr pScrn)
110{
111 DisplayModePtr pMode = xnfcalloc(sizeof(DisplayModeRec), 1);
112
113 TRACE_ENTRY();
114 if (!pScrn->modes)
115 {
116 pScrn->modes = pMode;
117 pMode->next = pMode;
118 pMode->prev = pMode;
119 }
120 else
121 {
122 pMode->next = pScrn->modes;
123 pMode->prev = pScrn->modes->prev;
124 pMode->next->prev = pMode;
125 pMode->prev->next = pMode;
126 }
127 return pMode;
128}
129
130/**
131 * Create display mode entries in the screen information structure for each
132 * of the graphics modes that we wish to support, that is:
133 * - A dynamic mode in first place which will be updated by the RandR code.
134 * - Any modes that the user requested in xorg.conf/XFree86Config.
135 */
136void vboxAddModes(ScrnInfoPtr pScrn)
137{
138 unsigned cx = 0;
139 unsigned cy = 0;
140 unsigned i;
141 DisplayModePtr pMode;
142
143 /* Add two dynamic mode entries. When we receive a new size hint we will
144 * update whichever of these is not current. */
145 pMode = vboxAddEmptyScreenMode(pScrn);
146 vboxFillDisplayMode(pScrn, pMode, NULL, 800, 600);
147 pMode = vboxAddEmptyScreenMode(pScrn);
148 vboxFillDisplayMode(pScrn, pMode, NULL, 800, 600);
149 /* Add any modes specified by the user. We assume here that the mode names
150 * reflect the mode sizes. */
151 for (i = 0; pScrn->display->modes && pScrn->display->modes[i]; i++)
152 {
153 if (sscanf(pScrn->display->modes[i], "%ux%u", &cx, &cy) == 2)
154 {
155 pMode = vboxAddEmptyScreenMode(pScrn);
156 vboxFillDisplayMode(pScrn, pMode, pScrn->display->modes[i], cx, cy);
157 }
158 }
159}
160
161/** Set the initial values for the guest screen size hints to standard values
162 * in case nothing else is available. */
163void VBoxInitialiseSizeHints(ScrnInfoPtr pScrn)
164{
165 VBOXPtr pVBox = VBOXGetRec(pScrn);
166 unsigned i;
167
168 for (i = 0; i < pVBox->cScreens; ++i)
169 {
170 pVBox->pScreens[i].aPreferredSize.cx = 800;
171 pVBox->pScreens[i].aPreferredSize.cy = 600;
172 pVBox->pScreens[i].afConnected = true;
173 }
174 /* Set up the first mode correctly to match the requested initial mode. */
175 pScrn->modes->HDisplay = pVBox->pScreens[0].aPreferredSize.cx;
176 pScrn->modes->VDisplay = pVBox->pScreens[0].aPreferredSize.cy;
177}
178
179static Bool useHardwareCursor(uint32_t fCursorCapabilities)
180{
181 if (fCursorCapabilities & VBOX_VBVA_CURSOR_CAPABILITY_HARDWARE)
182 return true;
183 return false;
184}
185
186static void compareAndMaybeSetUseHardwareCursor(VBOXPtr pVBox, uint32_t fCursorCapabilities, Bool *pfChanged, Bool fSet)
187{
188 if (pVBox->fUseHardwareCursor != useHardwareCursor(fCursorCapabilities))
189 *pfChanged = true;
190 if (fSet)
191 pVBox->fUseHardwareCursor = useHardwareCursor(fCursorCapabilities);
192}
193
194#define COMPARE_AND_MAYBE_SET(pDest, src, pfChanged, fSet) \
195do { \
196 if (*(pDest) != (src)) \
197 { \
198 if (fSet) \
199 *(pDest) = (src); \
200 *(pfChanged) = true; \
201 } \
202} while(0)
203
204/** Read in information about the most recent size hints and cursor
205 * capabilities requested for the guest screens from HGSMI. */
206void vbvxReadSizesAndCursorIntegrationFromHGSMI(ScrnInfoPtr pScrn, Bool *pfNeedUpdate)
207{
208 VBOXPtr pVBox = VBOXGetRec(pScrn);
209 int rc;
210 unsigned i;
211 Bool fChanged = false;
212 uint32_t fCursorCapabilities;
213
214 if (!pVBox->fHaveHGSMIModeHints)
215 return;
216 rc = VBoxHGSMIGetModeHints(&pVBox->guestCtx, pVBox->cScreens, pVBox->paVBVAModeHints);
217 AssertMsg(rc == VINF_SUCCESS, ("VBoxHGSMIGetModeHints failed, rc=%d.\n", rc));
218 for (i = 0; i < pVBox->cScreens; ++i)
219 if (pVBox->paVBVAModeHints[i].magic == VBVAMODEHINT_MAGIC)
220 {
221 COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].aPreferredSize.cx, pVBox->paVBVAModeHints[i].cx & 0x8fff, &fChanged, true);
222 COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].aPreferredSize.cy, pVBox->paVBVAModeHints[i].cy & 0x8fff, &fChanged, true);
223 COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].afConnected, RT_BOOL(pVBox->paVBVAModeHints[i].fEnabled), &fChanged, true);
224 COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].aPreferredLocation.x, (int32_t)pVBox->paVBVAModeHints[i].dx & 0x8fff, &fChanged,
225 true);
226 COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].aPreferredLocation.y, (int32_t)pVBox->paVBVAModeHints[i].dy & 0x8fff, &fChanged,
227 true);
228 if (pVBox->paVBVAModeHints[i].dx != ~(uint32_t)0 && pVBox->paVBVAModeHints[i].dy != ~(uint32_t)0)
229 COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].afHaveLocation, true, &fChanged, true);
230 else
231 COMPARE_AND_MAYBE_SET(&pVBox->pScreens[i].afHaveLocation, false, &fChanged, true);
232 }
233 rc = VBoxQueryConfHGSMI(&pVBox->guestCtx, VBOX_VBVA_CONF32_CURSOR_CAPABILITIES, &fCursorCapabilities);
234 AssertMsg(rc == VINF_SUCCESS, ("Getting VBOX_VBVA_CONF32_CURSOR_CAPABILITIES failed, rc=%d.\n", rc));
235 compareAndMaybeSetUseHardwareCursor(pVBox, fCursorCapabilities, &fChanged, true);
236 if (pfNeedUpdate != NULL && fChanged)
237 *pfNeedUpdate = true;
238}
239
240#undef COMPARE_AND_MAYBE_SET
241
242#ifdef VBOXVIDEO_13
243# ifdef RT_OS_LINUX
244/** We have this for two purposes: one is to ensure that the X server is woken
245 * up when we get a video ACPI event. Two is to grab ACPI video events to
246 * prevent gnome-settings-daemon from seeing them, as older versions ignored
247 * the time stamp and handled them at the wrong time. */
248static void acpiEventHandler(int fd, void *pvData)
249{
250 struct input_event event;
251 ssize_t rc;
252 RT_NOREF(pvData);
253
254 do
255 rc = read(fd, &event, sizeof(event));
256 while (rc > 0 || (rc == -1 && errno == EINTR));
257 /* Why do they return EAGAIN instead of zero bytes read like everyone else does? */
258 AssertMsg(rc != -1 || errno == EAGAIN, ("Reading ACPI input event failed.\n"));
259}
260
261void vbvxSetUpLinuxACPI(ScreenPtr pScreen)
262{
263 static const char s_szDevInput[] = "/dev/input/";
264 struct dirent *pDirent;
265 char szFile[sizeof(s_szDevInput) + sizeof(pDirent->d_name) + 16];
266 VBOXPtr pVBox = VBOXGetRec(xf86Screens[pScreen->myNum]);
267 DIR *pDir;
268 int fd = -1;
269
270 if (pVBox->fdACPIDevices != -1 || pVBox->hACPIEventHandler != NULL)
271 FatalError("ACPI input file descriptor not initialised correctly.\n");
272 pDir = opendir("/dev/input");
273 if (pDir == NULL)
274 return;
275 memcpy(szFile, s_szDevInput, sizeof(s_szDevInput));
276 for (pDirent = readdir(pDir); pDirent != NULL; pDirent = readdir(pDir))
277 {
278 if (strncmp(pDirent->d_name, "event", sizeof("event") - 1) == 0)
279 {
280#define BITS_PER_BLOCK (sizeof(unsigned long) * 8)
281 char szDevice[64] = "";
282 unsigned long afKeys[KEY_MAX / BITS_PER_BLOCK];
283 size_t const cchName = strlen(pDirent->d_name);
284 if (cchName + sizeof(s_szDevInput) > sizeof(szFile))
285 continue;
286 memcpy(&szFile[sizeof(s_szDevInput) - 1], pDirent->d_name, cchName + 1);
287 if (fd != -1)
288 close(fd);
289 fd = open(szFile, O_RDONLY | O_NONBLOCK);
290 if ( fd == -1
291 || ioctl(fd, EVIOCGNAME(sizeof(szDevice)), szDevice) == -1
292 || strcmp(szDevice, "Video Bus") != 0)
293 continue;
294 if ( ioctl(fd, EVIOCGBIT(EV_KEY, sizeof(afKeys)), afKeys) == -1
295 || (( afKeys[KEY_SWITCHVIDEOMODE / BITS_PER_BLOCK]
296 >> KEY_SWITCHVIDEOMODE % BITS_PER_BLOCK) & 1) == 0)
297 break;
298 if (ioctl(fd, EVIOCGRAB, (void *)1) != 0)
299 break;
300 pVBox->hACPIEventHandler
301 = xf86AddGeneralHandler(fd, acpiEventHandler, pScreen);
302 if (pVBox->hACPIEventHandler == NULL)
303 break;
304 pVBox->fdACPIDevices = fd;
305 fd = -1;
306 break;
307#undef BITS_PER_BLOCK
308 }
309 }
310 if (fd != -1)
311 close(fd);
312 closedir(pDir);
313}
314
315void vbvxCleanUpLinuxACPI(ScreenPtr pScreen)
316{
317 VBOXPtr pVBox = VBOXGetRec(xf86Screens[pScreen->myNum]);
318 if (pVBox->fdACPIDevices != -1)
319 close(pVBox->fdACPIDevices);
320 pVBox->fdACPIDevices = -1;
321 xf86RemoveGeneralHandler(pVBox->hACPIEventHandler);
322 pVBox->hACPIEventHandler = NULL;
323}
324# endif /* RT_OS_LINUX */
325#endif /* VBOXVIDEO_13 */
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