xresize

annotate xresize.c @ 0:8555f3aabbc7

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created hg repository for xresize, useful little bugger
author John Tsiombikas <nuclear@member.fsf.org>
date Thu, 10 Mar 2011 14:58:46 +0200
parents
children a2c94df7f405
rev   line source
nuclear@0 1 #include <stdio.h>
nuclear@0 2 #include <stdlib.h>
nuclear@0 3 #include <string.h>
nuclear@0 4 #include <ctype.h>
nuclear@0 5 #include <X11/Xlib.h>
nuclear@0 6
nuclear@0 7 #ifdef USE_XRANDR
nuclear@0 8 #include <X11/extensions/Xrandr.h>
nuclear@0 9
nuclear@0 10 char *randr_err_msg[] = {
nuclear@0 11 "RRSetConfigSuccess",
nuclear@0 12 "RRSetConfigInvalidConfigTime",
nuclear@0 13 "RRSetConfigInvalidTime",
nuclear@0 14 "RRSetConfigFailed"
nuclear@0 15 };
nuclear@0 16 #endif
nuclear@0 17
nuclear@0 18 #ifdef USE_XF86VM
nuclear@0 19 #include <X11/extensions/xf86vmode.h>
nuclear@0 20 #endif
nuclear@0 21
nuclear@0 22 int get_size(Display *dpy, int scr, int *xsz, int *ysz);
nuclear@0 23 int set_size(Display *dpy, int scr, int xsz, int ysz);
nuclear@0 24
nuclear@0 25 const char *usage = "usage: %s [options]\n"
nuclear@0 26 "options:\n"
nuclear@0 27 " -s <w>x<h> set specified screen size\n"
nuclear@0 28 " -f force size change without current size detection\n"
nuclear@0 29 " -h this usage information\n";
nuclear@0 30
nuclear@0 31 int use_xrandr = 1;
nuclear@0 32 int use_xf86vm = 1;
nuclear@0 33
nuclear@0 34 int main(int argc, char **argv)
nuclear@0 35 {
nuclear@0 36 int i, cur_xres, cur_yres, xres = -1, yres = -1;
nuclear@0 37 int force = 0;
nuclear@0 38 Display *dpy;
nuclear@0 39 int scr;
nuclear@0 40
nuclear@0 41 for(i=1; i<argc; i++) {
nuclear@0 42 if(argv[i][0] == '-' && (argv[i][2] == 0 || argv[i][1] == '-')) {
nuclear@0 43 char *sep;
nuclear@0 44
nuclear@0 45 switch(argv[i][1]) {
nuclear@0 46 case 's':
nuclear@0 47 if(!isdigit(argv[++i][0]) || !(sep = strchr(argv[i], 'x')) || !isdigit(*(sep + 1))) {
nuclear@0 48 fputs("-s must be followed by something like \"640x480\"\n", stderr);
nuclear@0 49 return EXIT_FAILURE;
nuclear@0 50 }
nuclear@0 51 xres = atoi(argv[i]);
nuclear@0 52 yres = atoi(sep + 1);
nuclear@0 53 break;
nuclear@0 54
nuclear@0 55 case 'f':
nuclear@0 56 force = 1;
nuclear@0 57 break;
nuclear@0 58
nuclear@0 59 case 'h':
nuclear@0 60 printf(usage, argv[0]);
nuclear@0 61 return 0;
nuclear@0 62
nuclear@0 63 case '-':
nuclear@0 64 if(strcmp(argv[i], "--no-xrandr") == 0) {
nuclear@0 65 use_xrandr = 0;
nuclear@0 66 break;
nuclear@0 67 } else if(strcmp(argv[i], "--no-xf86vm") == 0) {
nuclear@0 68 use_xf86vm = 0;
nuclear@0 69 break;
nuclear@0 70 }
nuclear@0 71 /* fallthrough to invalid arg */
nuclear@0 72 default:
nuclear@0 73 fprintf(stderr, "unrecognized option: %s, try -h for usage\n", argv[i]);
nuclear@0 74 return 1;
nuclear@0 75 }
nuclear@0 76 } else {
nuclear@0 77 fprintf(stderr, "unexpected argument: %s\n", argv[i]);
nuclear@0 78 return 1;
nuclear@0 79 }
nuclear@0 80 }
nuclear@0 81
nuclear@0 82 if(!(dpy = XOpenDisplay(0))) {
nuclear@0 83 fprintf(stderr, "failed to connect to the X server\n");
nuclear@0 84 return 1;
nuclear@0 85 }
nuclear@0 86 scr = DefaultScreen(dpy);
nuclear@0 87
nuclear@0 88 if(get_size(dpy, scr, &cur_xres, &cur_yres) == -1) {
nuclear@0 89 fprintf(stderr, "failed to retreive current screen size\n");
nuclear@0 90 XCloseDisplay(dpy);
nuclear@0 91 return 1;
nuclear@0 92 }
nuclear@0 93 printf("current size: %dx%d\n", cur_xres, cur_yres);
nuclear@0 94
nuclear@0 95 if(xres != -1) { /* size change requested */
nuclear@0 96 if(xres != cur_xres || yres != cur_yres || force) {
nuclear@0 97 if(set_size(dpy, scr, xres, yres) == -1) {
nuclear@0 98 fprintf(stderr, "set_size failed\n");
nuclear@0 99 XCloseDisplay(dpy);
nuclear@0 100 return 1;
nuclear@0 101 }
nuclear@0 102 printf("size updated sucessfully\n");
nuclear@0 103 } else {
nuclear@0 104 printf("already at requested size! do nothing (use -f to force change).\n");
nuclear@0 105 }
nuclear@0 106 }
nuclear@0 107 XCloseDisplay(dpy);
nuclear@0 108 return 0;
nuclear@0 109 }
nuclear@0 110
nuclear@0 111 int get_size(Display *dpy, int scr, int *xsz, int *ysz)
nuclear@0 112 {
nuclear@0 113 Window root;
nuclear@0 114 int event_base, error_base;
nuclear@0 115
nuclear@0 116 scr = DefaultScreen(dpy);
nuclear@0 117 root = RootWindow(dpy, scr);
nuclear@0 118
nuclear@0 119 /* first try r&r */
nuclear@0 120 #ifdef USE_XRANDR
nuclear@0 121 if(use_xrandr && XRRQueryExtension(dpy, &event_base, &error_base)) {
nuclear@0 122 XRRScreenConfiguration *xrr_config;
nuclear@0 123 XRRScreenSize *ssizes;
nuclear@0 124 Rotation rot;
nuclear@0 125 int ssize_count, curr;
nuclear@0 126
nuclear@0 127 if(!(xrr_config = XRRGetScreenInfo(dpy, root))) {
nuclear@0 128 fprintf(stderr, "failed to retrieve screen configuration\n");
nuclear@0 129 return -1;
nuclear@0 130 }
nuclear@0 131 ssizes = XRRConfigSizes(xrr_config, &ssize_count);
nuclear@0 132 curr = XRRConfigCurrentConfiguration(xrr_config, &rot);
nuclear@0 133
nuclear@0 134 *xsz = ssizes[curr].width;
nuclear@0 135 *ysz = ssizes[curr].height;
nuclear@0 136
nuclear@0 137 XRRFreeScreenConfigInfo(xrr_config);
nuclear@0 138 return 0;
nuclear@0 139 }
nuclear@0 140 #endif
nuclear@0 141
nuclear@0 142 /* then try xf86vm */
nuclear@0 143 #ifdef USE_XF86VM
nuclear@0 144 if(use_xf86vm && XF86VidModeQueryExtension(dpy, &event_base, &error_base)) {
nuclear@0 145 XF86VidModeModeLine modeline;
nuclear@0 146 int dot_clock;
nuclear@0 147
nuclear@0 148 if(!XF86VidModeGetModeLine(dpy, scr, &dot_clock, &modeline)) {
nuclear@0 149 fprintf(stderr, "failed to get current video mode\n");
nuclear@0 150 return -1;
nuclear@0 151 }
nuclear@0 152
nuclear@0 153 *xsz = modeline.hdisplay;
nuclear@0 154 *ysz = modeline.vdisplay;
nuclear@0 155
nuclear@0 156 if(modeline.privsize) {
nuclear@0 157 XFree(modeline.private);
nuclear@0 158 }
nuclear@0 159 return 0;
nuclear@0 160 }
nuclear@0 161 #endif
nuclear@0 162
nuclear@0 163 fprintf(stderr, "can't get any size information\n");
nuclear@0 164 return -1;
nuclear@0 165 }
nuclear@0 166
nuclear@0 167
nuclear@0 168 int set_size(Display *dpy, int scr, int xsz, int ysz)
nuclear@0 169 {
nuclear@0 170 int i, event_base, error_base;
nuclear@0 171 Window root;
nuclear@0 172
nuclear@0 173 root = RootWindow(dpy, scr);
nuclear@0 174
nuclear@0 175 /* first try r&r */
nuclear@0 176 #ifdef USE_XRANDR
nuclear@0 177 if(use_xrandr && XRRQueryExtension(dpy, &event_base, &error_base)) {
nuclear@0 178 Status st;
nuclear@0 179 XRRScreenConfiguration *xrr_config;
nuclear@0 180 XRRScreenSize *ssizes;
nuclear@0 181 Rotation rot;
nuclear@0 182 int ssize_count, curr;
nuclear@0 183 Time timestamp, cfg_timestamp;
nuclear@0 184
nuclear@0 185 if(!(xrr_config = XRRGetScreenInfo(dpy, root))) {
nuclear@0 186 fprintf(stderr, "failed to retrieve screen configuration\n");
nuclear@0 187 return -1;
nuclear@0 188 }
nuclear@0 189 ssizes = XRRConfigSizes(xrr_config, &ssize_count);
nuclear@0 190 curr = XRRConfigCurrentConfiguration(xrr_config, &rot);
nuclear@0 191 timestamp = XRRConfigTimes(xrr_config, &cfg_timestamp);
nuclear@0 192
nuclear@0 193 if(xsz == ssizes[curr].width && ysz == ssizes[curr].height) {
nuclear@0 194 XRRFreeScreenConfigInfo(xrr_config);
nuclear@0 195 return 0;
nuclear@0 196 }
nuclear@0 197
nuclear@0 198 for(i=0; i<ssize_count; i++) {
nuclear@0 199 if(ssizes[i].width == xsz && ssizes[i].height == ysz) {
nuclear@0 200 break;
nuclear@0 201 }
nuclear@0 202 }
nuclear@0 203 if(i == ssize_count) {
nuclear@0 204 fprintf(stderr, "requested size unsuppored by the X server configuration\n");
nuclear@0 205 XRRFreeScreenConfigInfo(xrr_config);
nuclear@0 206 return -1;
nuclear@0 207 }
nuclear@0 208
nuclear@0 209 if((st = XRRSetScreenConfig(dpy, xrr_config, root, i, rot, timestamp)) != 0) {
nuclear@0 210 fprintf(stderr, "failed to set resolution with r-and-r, error: %d (%s)\n", st, randr_err_msg[st]);
nuclear@0 211 XRRFreeScreenConfigInfo(xrr_config);
nuclear@0 212 #ifdef USE_XF86VM
nuclear@0 213 printf("retrying with xf86vm...\n");
nuclear@0 214 goto retry_with_xf86vm;
nuclear@0 215 #endif
nuclear@0 216 return -1;
nuclear@0 217 }
nuclear@0 218
nuclear@0 219 XRRFreeScreenConfigInfo(xrr_config);
nuclear@0 220 return 0;
nuclear@0 221 }
nuclear@0 222 #endif
nuclear@0 223
nuclear@0 224 /*try xf86vm */
nuclear@0 225 #ifdef USE_XF86VM
nuclear@0 226 retry_with_xf86vm:
nuclear@0 227 if(use_xf86vm && XF86VidModeQueryExtension(dpy, &event_base, &error_base)) {
nuclear@0 228 XF86VidModeModeInfo **modes;
nuclear@0 229 int mode_count;
nuclear@0 230
nuclear@0 231 if(!XF86VidModeGetAllModeLines(dpy, scr, &mode_count, &modes)) {
nuclear@0 232 fprintf(stderr, "failed to get list of available video modes\n");
nuclear@0 233 return -1;
nuclear@0 234 }
nuclear@0 235
nuclear@0 236 for(i=0; i<mode_count; i++) {
nuclear@0 237 if(modes[i]->hdisplay == xsz && modes[i]->vdisplay == ysz) {
nuclear@0 238 break;
nuclear@0 239 }
nuclear@0 240 }
nuclear@0 241 if(i == mode_count) {
nuclear@0 242 fprintf(stderr, "requested size unsuppored by the X server configuration\n");
nuclear@0 243 XFree(modes);
nuclear@0 244 return -1;
nuclear@0 245 }
nuclear@0 246
nuclear@0 247 if(!XF86VidModeSwitchToMode(dpy, scr, modes[i])) {
nuclear@0 248 fprintf(stderr, "failed to set requested size with xf86vm\n");
nuclear@0 249 XFree(modes);
nuclear@0 250 return -1;
nuclear@0 251 }
nuclear@0 252 XF86VidModeSetViewPort(dpy, scr, 0, 0);
nuclear@0 253
nuclear@0 254 XFree(modes);
nuclear@0 255 return 0;
nuclear@0 256 }
nuclear@0 257 #endif
nuclear@0 258
nuclear@0 259 fprintf(stderr, "not possible to change display size\n");
nuclear@0 260 return -1;
nuclear@0 261 }