Pierre Ossman | 1350069 | 2011-06-13 11:23:08 +0000 | [diff] [blame] | 1 | /* Copyright (C) 2002-2005 RealVNC Ltd. All Rights Reserved. |
Pierre Ossman | ac13abe | 2014-02-07 14:46:26 +0100 | [diff] [blame] | 2 | * Copyright 2011-2014 Pierre Ossman for Cendio AB |
Pierre Ossman | 1350069 | 2011-06-13 11:23:08 +0000 | [diff] [blame] | 3 | * |
| 4 | * This is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License as published by |
| 6 | * the Free Software Foundation; either version 2 of the License, or |
| 7 | * (at your option) any later version. |
| 8 | * |
| 9 | * This software is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | * |
| 14 | * You should have received a copy of the GNU General Public License |
| 15 | * along with this software; if not, write to the Free Software |
| 16 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
| 17 | * USA. |
| 18 | */ |
| 19 | |
Peter Åstrand | c359f36 | 2011-08-23 12:04:46 +0000 | [diff] [blame] | 20 | #ifdef HAVE_CONFIG_H |
| 21 | #include <config.h> |
| 22 | #endif |
| 23 | |
Pierre Ossman | 1350069 | 2011-06-13 11:23:08 +0000 | [diff] [blame] | 24 | #include <assert.h> |
| 25 | #include <stdlib.h> |
| 26 | |
| 27 | #include <FL/x.H> |
| 28 | |
| 29 | #include <rfb/LogWriter.h> |
| 30 | #include <rfb/Exception.h> |
| 31 | |
Pierre Ossman | 8ca4c1d | 2014-09-22 12:54:26 +0200 | [diff] [blame] | 32 | #include "i18n.h" |
Pierre Ossman | 1350069 | 2011-06-13 11:23:08 +0000 | [diff] [blame] | 33 | #include "X11PixelBuffer.h" |
| 34 | |
| 35 | using namespace rfb; |
| 36 | |
Pierre Ossman | ac13abe | 2014-02-07 14:46:26 +0100 | [diff] [blame] | 37 | static rfb::LogWriter vlog("X11PixelBuffer"); |
Pierre Ossman | 1350069 | 2011-06-13 11:23:08 +0000 | [diff] [blame] | 38 | |
| 39 | static PixelFormat display_pf() |
| 40 | { |
| 41 | int i; |
| 42 | |
| 43 | int bpp; |
| 44 | int trueColour, bigEndian; |
| 45 | int redShift, greenShift, blueShift; |
| 46 | int redMax, greenMax, blueMax; |
| 47 | |
| 48 | int nformats; |
| 49 | XPixmapFormatValues* format; |
| 50 | |
| 51 | // Might not be open at this point |
| 52 | fl_open_display(); |
| 53 | |
| 54 | format = XListPixmapFormats(fl_display, &nformats); |
| 55 | |
| 56 | for (i = 0; i < nformats; i++) |
| 57 | if (format[i].depth == fl_visual->depth) break; |
| 58 | |
| 59 | if (i == nformats) |
Pierre Ossman | 8ca4c1d | 2014-09-22 12:54:26 +0200 | [diff] [blame] | 60 | throw rfb::Exception(_("Error: display lacks pixmap format for default depth")); |
Pierre Ossman | 1350069 | 2011-06-13 11:23:08 +0000 | [diff] [blame] | 61 | |
| 62 | switch (format[i].bits_per_pixel) { |
| 63 | case 8: |
| 64 | case 16: |
| 65 | case 32: |
| 66 | bpp = format[i].bits_per_pixel; |
| 67 | break; |
| 68 | default: |
Pierre Ossman | 8ca4c1d | 2014-09-22 12:54:26 +0200 | [diff] [blame] | 69 | throw rfb::Exception(_("Error: couldn't find suitable pixmap format")); |
Pierre Ossman | 1350069 | 2011-06-13 11:23:08 +0000 | [diff] [blame] | 70 | } |
| 71 | |
| 72 | XFree(format); |
| 73 | |
| 74 | bigEndian = (ImageByteOrder(fl_display) == MSBFirst); |
| 75 | trueColour = (fl_visual->c_class == TrueColor); |
| 76 | |
| 77 | if (!trueColour) |
Pierre Ossman | 8ca4c1d | 2014-09-22 12:54:26 +0200 | [diff] [blame] | 78 | throw rfb::Exception(_("Error: only true colour displays supported")); |
Pierre Ossman | 1350069 | 2011-06-13 11:23:08 +0000 | [diff] [blame] | 79 | |
Pierre Ossman | 8ca4c1d | 2014-09-22 12:54:26 +0200 | [diff] [blame] | 80 | vlog.info(_("Using default colormap and visual, %sdepth %d."), |
Pierre Ossman | 1350069 | 2011-06-13 11:23:08 +0000 | [diff] [blame] | 81 | (fl_visual->c_class == TrueColor) ? "TrueColor, " : |
| 82 | ((fl_visual->c_class == PseudoColor) ? "PseudoColor, " : ""), |
| 83 | fl_visual->depth); |
| 84 | |
| 85 | redShift = ffs(fl_visual->red_mask) - 1; |
| 86 | greenShift = ffs(fl_visual->green_mask) - 1; |
| 87 | blueShift = ffs(fl_visual->blue_mask) - 1; |
| 88 | redMax = fl_visual->red_mask >> redShift; |
| 89 | greenMax = fl_visual->green_mask >> greenShift; |
| 90 | blueMax = fl_visual->blue_mask >> blueShift; |
| 91 | |
| 92 | return PixelFormat(bpp, fl_visual->depth, bigEndian, trueColour, |
| 93 | redMax, greenMax, blueMax, |
| 94 | redShift, greenShift, blueShift); |
| 95 | } |
| 96 | |
Pierre Ossman | ac13abe | 2014-02-07 14:46:26 +0100 | [diff] [blame] | 97 | X11PixelBuffer::X11PixelBuffer(int width, int height) : |
Pierre Ossman | 2e5a106 | 2014-01-30 17:57:27 +0100 | [diff] [blame] | 98 | PlatformPixelBuffer(display_pf(), width, height, NULL, 0), |
Pierre Ossman | 1350069 | 2011-06-13 11:23:08 +0000 | [diff] [blame] | 99 | shminfo(NULL), xim(NULL) |
| 100 | { |
| 101 | // Might not be open at this point |
| 102 | fl_open_display(); |
| 103 | |
| 104 | if (!setupShm()) { |
| 105 | xim = XCreateImage(fl_display, fl_visual->visual, fl_visual->depth, |
| 106 | ZPixmap, 0, 0, width, height, BitmapPad(fl_display), 0); |
| 107 | assert(xim); |
| 108 | |
| 109 | xim->data = (char*)malloc(xim->bytes_per_line * xim->height); |
| 110 | assert(xim->data); |
| 111 | } |
| 112 | |
| 113 | data = (rdr::U8*)xim->data; |
Pierre Ossman | 2e5a106 | 2014-01-30 17:57:27 +0100 | [diff] [blame] | 114 | stride = xim->bytes_per_line / (getPF().bpp/8); |
Pierre Ossman | 1350069 | 2011-06-13 11:23:08 +0000 | [diff] [blame] | 115 | } |
| 116 | |
| 117 | |
Pierre Ossman | ac13abe | 2014-02-07 14:46:26 +0100 | [diff] [blame] | 118 | X11PixelBuffer::~X11PixelBuffer() |
Pierre Ossman | 1350069 | 2011-06-13 11:23:08 +0000 | [diff] [blame] | 119 | { |
| 120 | if (shminfo) { |
| 121 | vlog.debug("Freeing shared memory XImage"); |
| 122 | shmdt(shminfo->shmaddr); |
| 123 | shmctl(shminfo->shmid, IPC_RMID, 0); |
| 124 | delete shminfo; |
| 125 | shminfo = NULL; |
| 126 | } |
| 127 | |
| 128 | // XDestroyImage() will free(xim->data) if appropriate |
| 129 | if (xim) |
| 130 | XDestroyImage(xim); |
| 131 | xim = NULL; |
| 132 | } |
| 133 | |
| 134 | |
Pierre Ossman | ac13abe | 2014-02-07 14:46:26 +0100 | [diff] [blame] | 135 | void X11PixelBuffer::draw(int src_x, int src_y, int x, int y, int w, int h) |
Pierre Ossman | 1350069 | 2011-06-13 11:23:08 +0000 | [diff] [blame] | 136 | { |
| 137 | if (shminfo) |
| 138 | XShmPutImage(fl_display, fl_window, fl_gc, xim, src_x, src_y, x, y, w, h, False); |
| 139 | else |
| 140 | XPutImage(fl_display, fl_window, fl_gc, xim, src_x, src_y, x, y, w, h); |
| 141 | } |
| 142 | |
| 143 | |
Pierre Ossman | 4d01a9e | 2011-06-17 08:35:22 +0000 | [diff] [blame] | 144 | static bool caughtError; |
| 145 | |
| 146 | static int XShmAttachErrorHandler(Display *dpy, XErrorEvent *error) |
| 147 | { |
| 148 | caughtError = true; |
| 149 | return 0; |
| 150 | } |
Pierre Ossman | 1350069 | 2011-06-13 11:23:08 +0000 | [diff] [blame] | 151 | |
Pierre Ossman | ac13abe | 2014-02-07 14:46:26 +0100 | [diff] [blame] | 152 | int X11PixelBuffer::setupShm() |
Pierre Ossman | 1350069 | 2011-06-13 11:23:08 +0000 | [diff] [blame] | 153 | { |
| 154 | int major, minor; |
| 155 | Bool pixmaps; |
Pierre Ossman | 4d01a9e | 2011-06-17 08:35:22 +0000 | [diff] [blame] | 156 | XErrorHandler old_handler; |
| 157 | Status status; |
Pierre Ossman | 1350069 | 2011-06-13 11:23:08 +0000 | [diff] [blame] | 158 | |
| 159 | if (!XShmQueryVersion(fl_display, &major, &minor, &pixmaps)) |
| 160 | return 0; |
| 161 | |
| 162 | shminfo = new XShmSegmentInfo; |
| 163 | |
| 164 | xim = XShmCreateImage(fl_display, fl_visual->visual, fl_visual->depth, |
| 165 | ZPixmap, 0, shminfo, width(), height()); |
| 166 | if (!xim) |
| 167 | goto free_shminfo; |
| 168 | |
| 169 | shminfo->shmid = shmget(IPC_PRIVATE, |
| 170 | xim->bytes_per_line * xim->height, |
| 171 | IPC_CREAT|0777); |
| 172 | if (shminfo->shmid == -1) |
| 173 | goto free_xim; |
| 174 | |
| 175 | shminfo->shmaddr = xim->data = (char*)shmat(shminfo->shmid, 0, 0); |
| 176 | if (shminfo->shmaddr == (char *)-1) |
| 177 | goto free_shm; |
| 178 | |
| 179 | shminfo->readOnly = True; |
Pierre Ossman | 4d01a9e | 2011-06-17 08:35:22 +0000 | [diff] [blame] | 180 | |
| 181 | // This is the only way we can detect that shared memory won't work |
| 182 | // (e.g. because we're accessing a remote X11 server) |
| 183 | caughtError = false; |
| 184 | old_handler = XSetErrorHandler(XShmAttachErrorHandler); |
| 185 | |
Pierre Ossman | 1350069 | 2011-06-13 11:23:08 +0000 | [diff] [blame] | 186 | XShmAttach(fl_display, shminfo); |
Pierre Ossman | 4d01a9e | 2011-06-17 08:35:22 +0000 | [diff] [blame] | 187 | XSync(fl_display, False); |
| 188 | |
| 189 | XSetErrorHandler(old_handler); |
| 190 | |
| 191 | if (caughtError) |
| 192 | goto free_shmaddr; |
Pierre Ossman | 1350069 | 2011-06-13 11:23:08 +0000 | [diff] [blame] | 193 | |
| 194 | vlog.debug("Using shared memory XImage"); |
| 195 | |
| 196 | return 1; |
| 197 | |
Pierre Ossman | 4d01a9e | 2011-06-17 08:35:22 +0000 | [diff] [blame] | 198 | free_shmaddr: |
| 199 | shmdt(shminfo->shmaddr); |
| 200 | |
Pierre Ossman | 1350069 | 2011-06-13 11:23:08 +0000 | [diff] [blame] | 201 | free_shm: |
| 202 | shmctl(shminfo->shmid, IPC_RMID, 0); |
| 203 | |
| 204 | free_xim: |
| 205 | XDestroyImage(xim); |
| 206 | xim = NULL; |
| 207 | |
| 208 | free_shminfo: |
| 209 | delete shminfo; |
| 210 | shminfo = NULL; |
| 211 | |
| 212 | return 0; |
| 213 | } |