display.c

   1 #include "display.h"
   2 #include "screen.h"
   3 #include "gettext.h"
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <stdio.h>
   7
   8 #include <xcb/damage.h>
   9 #include <xcb/render.h>
  10 #include <xcb/xfixes.h>
  11 #include <xcb/composite.h>
  12
  13 typedef struct {
  14     xcb_atom_t               *atom;
  15     const char               *name;
  16     xcb_intern_atom_cookie_t  ck;
  17 } d_atom_query_t;
  18
  19 #define setup_extension(name) \
  20     xcb_##name##_query_version_cookie_t ck_##name;
  21
  22 #define find_extension_xfixes(dpy) &dpy->xfixes;
  23 #define find_extension_render(dpy) &dpy->render;
  24 #define find_extension_composite(dpy) &dpy->composite;
  25 #define find_extension_damage(dpy) &dpy->damage;
  26
  27 #define version_extension_xfixes \
  28   XCB_XFIXES_MAJOR_VERSION, XCB_XFIXES_MAJOR_VERSION
  29 #define version_extension_render \
  30   XCB_RENDER_MAJOR_VERSION, XCB_RENDER_MAJOR_VERSION
  31 #define version_extension_composite \
  32   XCB_COMPOSITE_MAJOR_VERSION, XCB_COMPOSITE_MAJOR_VERSION
  33 #define version_extension_damage \
  34   XCB_DAMAGE_MAJOR_VERSION, XCB_DAMAGE_MAJOR_VERSION
  35
  36 #define query_extension(dpy, name) \
  37 { \
  38     const xcb_query_extension_reply_t *rep;          \
  39     d_display_ext_t *ext; \
  40 \
  41     xcb_prefetch_extension_data(dpy->conn, &xcb_##name##_id);  \
  42     rep = xcb_get_extension_data(dpy->conn, &xcb_##name##_id); \
  43 \
  44     ext = find_extension_##name(dpy) \
  45     ext->present = rep && rep->present;       \
  46     ext->error   = rep && rep->first_error;   \
  47     ext->event   = rep && rep->first_event;   \
  48     ext->opcode  = rep && rep->major_opcode;  \
  49 \
  50     if (ext->present) \
  51         ck_##name = xcb_##name##_query_version(dpy->conn, \
  52                                                version_extension_##name); \
  53 }
  54
  55 #define reply_extension(dpy, name) \
  56 { \
  57     xcb_##name##_query_version_reply_t *rep; \
  58     d_display_ext_t *ext; \
  59 \
  60     ext = find_extension_##name(dpy) \
  61     if (ext->present) { \
  62         rep = xcb_##name##_query_version_reply(dpy->conn, ck_##name, NULL); \
  63         if (rep) { \
  64             ext->major_version = rep->major_version; \
  65             ext->minor_version = rep->minor_version; \
  66             free(rep); \
  67         } \
  68         else { \
  69             printf("error querying the %s extension's version\n", "##name##");\
  70             ext->present = FALSE; \
  71         } \
  72     } \
  73 }
  74
  75 static void
  76 query_atom(d_display_t *dpy, d_atom_query_t *q)
  77 {
  78     q->ck = xcb_intern_atom(dpy->conn, FALSE, strlen(q->name), q->name);
  79 }
  80
  81 static void
  82 reply_atom(d_display_t *dpy, d_atom_query_t *q)
  83 {
  84     xcb_intern_atom_reply_t *rep;
  85     rep = xcb_intern_atom_reply(dpy->conn, q->ck, NULL);
  86     if (rep) {
  87         *q->atom = rep->atom;
  88         free(rep);
  89     }
  90     else {
  91         printf("unable to query atom %s\n", q->name);
  92         *q->atom = 0;
  93     }
  94 }
  95
  96 static void
  97 query_statics(d_display_t *dpy)
  98 {
  99     d_atom_query_t atoms[] = {
 100         { .atom = &dpy->a.atom,
 101           .name = "ATOM" },
 102         { .atom = &dpy->a.cardinal,
 103           .name = "CARDINAL" },
 104         { .atom = &dpy->a.utf8_string,
 105           .name = "UTF8_STRING" },
 106         { .atom = &dpy->a.string,
 107           .name = "STRING" },
 108         { .atom = &dpy->a.pixmap,
 109           .name = "PIXMAP" },
 110         { .atom = &dpy->a.net_wm_window_type,
 111           .name = "_NET_WM_WINDOW_TYPE" },
 112         { .atom = &dpy->a.net_wm_window_type_desktop,
 113           .name = "_NET_WM_WINDOW_TYPE_DESKTOP" },
 114         { .atom = &dpy->a.net_wm_window_type_dock,
 115           .name = "_NET_WM_WINDOW_TYPE_DOCK" },
 116         { .atom = &dpy->a.net_wm_window_type_normal,
 117           .name = "_NET_WM_WINDOW_TYPE_NORMAL" },
 118         { .atom = &dpy->a.net_wm_window_type_dialog,
 119           .name = "_NET_WM_WINDOW_TYPE_DIALOG" },
 120         { .atom = &dpy->a.net_wm_window_type_toolbar,
 121           .name = "_NET_WM_WINDOW_TYPE_TOOLBAR" },
 122         { .atom = &dpy->a.net_wm_window_type_menu,
 123           .name = "_NET_WM_WINDOW_TYPE_MENU" },
 124         { .atom = &dpy->a.net_wm_window_type_utility,
 125           .name = "_NET_WM_WINDOW_TYPE_UTILITY" },
 126         { .atom = &dpy->a.net_wm_window_type_splash,
 127           .name = "_NET_WM_WINDOW_TYPE_SPLAH" },
 128         { .atom = &dpy->a.net_wm_window_type_tooltip,
 129           .name = "_NET_WM_WINDOW_TYPE_TOOLTIP" },
 130         { .atom = &dpy->a.net_wm_window_type_combo,
 131           .name = "_NET_WM_WINDOW_TYPE_COMBO" },
 132         { .atom = &dpy->a.net_wm_window_type_dropdown_menu,
 133           .name = "_NET_WM_WINDOW_TYPE_DROPDOWN_MENU" },
 134         { .atom = &dpy->a.net_wm_window_type_popup_menu,
 135           .name = "_NET_WM_WINDOW_TYPE_POPUP_MENU" },
 136         { .atom = &dpy->a.net_wm_window_type_notification,
 137           .name = "_NET_WM_WINDOW_TYPE_NOTIFICATION" },
 138         { .atom = NULL }
 139     };
 140     int i;
 141     setup_extension(xfixes);
 142     setup_extension(render);
 143     setup_extension(composite);
 144     setup_extension(damage);
 145
 146     query_extension(dpy, xfixes);
 147     query_extension(dpy, render);
 148     query_extension(dpy, composite);
 149     query_extension(dpy, damage);
 150
 151     for (i = 0; atoms[i].atom != NULL; ++i)
 152         query_atom(dpy, &atoms[i]);
 153
 154     xcb_flush(dpy->conn);
 155
 156     reply_extension(dpy, xfixes);
 157     reply_extension(dpy, render);
 158     reply_extension(dpy, composite);
 159     reply_extension(dpy, damage);
 160
 161     for (i = 0; atoms[i].atom != NULL; ++i)
 162         reply_atom(dpy, &atoms[i]);
 163 }
 164
 165 d_display_t*
 166 display_open(const char *name)
 167 {
 168     d_display_t *dpy = NULL;
 169     xcb_connection_t *conn;
 170
 171     conn = xcb_connect(name, NULL);
 172     if (conn && !xcb_connection_has_error(conn)) {
 173         dpy = malloc(sizeof(d_display_t));
 174         dpy->conn = conn;
 175         dpy->ref = 1;
 176         dpy->screens = NULL;
 177         dpy->nscreens = 0;
 178
 179         query_statics(dpy);
 180     }
 181     return dpy;
 182 }
 183
 184 void
 185 display_ref(d_display_t *dpy)
 186 {
 187     ++dpy->ref;
 188 }
 189
 190 void
 191 display_unref(d_display_t *dpy)
 192 {
 193     if (dpy && --dpy->ref == 0) {
 194         int i;
 195         xcb_disconnect(dpy->conn);
 196
 197         for (i = 0; i < dpy->nscreens; ++i)
 198             screen_free(&dpy->screens[i]);
 199         free(dpy->screens);
 200         free(dpy);
 201     }
 202 }
 203
 204 void
 205 display_error(d_display_t *dpy, xcb_generic_error_t *ev)
 206 {
 207     const int major_opcode = ((xcb_request_error_t*)ev)->major_opcode;
 208     const int minor_opcode = ((xcb_request_error_t*)ev)->minor_opcode;
 209     const char *name, *req;
 210
 211     /* XXX check if we should ignore it (ev->full_sequence) */
 212
 213     (void)dpy;
 214
 215     name = NULL;
 216     switch (ev->error_code) {
 217     case XCB_REQUEST:   name = "BadRequest";   break;
 218     case XCB_VALUE:     name = "BadValue";     break;
 219     case XCB_WINDOW:    name = "BadWindow";    break;
 220     case XCB_PIXMAP:    name = "BadPixmap";    break;
 221     case XCB_MATCH:     name = "BadMatch";     break;
 222     case XCB_DRAWABLE:  name = "BadDrawable";  break;
 223     case XCB_G_CONTEXT: name = "BadGC";        break;
 224     default: break;
 225     }
 226     if (!name)
 227         switch (ev->error_code - dpy->xfixes.error) {
 228         case XCB_XFIXES_BAD_REGION: name = "BadRegion"; break;
 229         default: break;
 230         }
 231     if (!name)
 232         switch (ev->error_code - dpy->damage.error) {
 233         case XCB_DAMAGE_BAD_DAMAGE: name = "BadDamage"; break;
 234         default: break;
 235         }
 236     if (!name)
 237         switch (ev->error_code - dpy->render.error) {
 238         case XCB_RENDER_PICT_FORMAT: name = "BadPictFormat"; break;
 239         case XCB_RENDER_PICT_OP:     name = "BadPictOp"; break;
 240         case XCB_RENDER_PICTURE:     name = "BadPicture"; break;
 241         case XCB_RENDER_GLYPH_SET:   name = "BadGlyphSet"; break;
 242         case XCB_RENDER_GLYPH:       name = "BadGlyph"; break;
 243         default: break;
 244         }
 245
 246     if (major_opcode <= 127)
 247         switch (major_opcode) {
 248         case 1:  req = "CreateWindow";           break;
 249         case 2:  req = "ChangeWindowAttributes"; break;
 250         case 3:  req = "GetWindowAttributes";    break;
 251         case 14: req = "GetGeometry";            break;
 252         case 15: req = "QueryTree";              break;
 253         case 18: req = "ChangeProperty";         break;
 254         case 20: req = "GetProperty";            break;
 255         case 22: req = "SetSelectionOwner";      break;
 256         case 23: req = "GetSelectionOwner";      break;
 257         case 53: req = "CreatePixmap";           break;
 258         case 54: req = "FreePixmap";             break;
 259         case 55: req = "CreateGC";               break;
 260         case 56: req = "ChangeGC";               break;
 261         case 60: req = "FreeGC";                 break;
 262         case 72: req = "PutImage";               break;
 263         default: break;
 264         }
 265
 266     if (name && req)
 267         printf("XError: %s %s!\n",
 268                name, req);
 269     else if (name)
 270         printf("XError: %s major opcode %d minor opcode %d!\n",
 271                name, major_opcode, minor_opcode);
 272     else
 273         printf("XError: code %d major opcode %d minor opcode %d!\n",
 274                ev->error_code, major_opcode, minor_opcode);
 275
 276     abort();
 277 }
 278
 279 int
 280 display_claim_screens(d_display_t *dpy)
 281 {
 282     static const xcb_setup_t *setup;
 283     xcb_screen_iterator_t it;
 284     int i;
 285     d_screen_t sc;
 286
 287     setup = xcb_get_setup(dpy->conn);
 288
 289     i = 0;
 290     for (it = xcb_setup_roots_iterator(setup); it.rem; xcb_screen_next(&it)) {
 291         sc.super = *it.data;
 292         sc.dpy = dpy;
 293         sc.num = i++;
 294         if (screen_register(dpy, i, &sc)) {
 295             ++dpy->nscreens;
 296             dpy->screens = realloc(dpy->screens,
 297                                    sizeof(d_screen_t)*dpy->nscreens);
 298             dpy->screens[dpy->nscreens-1] = sc;
 299             printf(_("managing screen %d\n"), sc.num);
 300         }
 301     }
 302     return dpy->nscreens;
 303 }
 304
 305 d_screen_t*
 306 display_screen_from_root(d_display_t *dpy, xcb_window_t root)
 307 {
 308     int i;
 309     for (i = 0; i < dpy->nscreens; ++i)
 310         if (dpy->screens[i].super.root == root) return &dpy->screens[i];
 311     g_assert_not_reached();
 312     return NULL;
 313 }
 314