display.c

   1 #include "efence.h"
   2
   3 #include "display.h"
   4 #include "screen.h"
   5 #include "list.h"
   6 #include "gettext.h"
   7 #include <stdlib.h>
   8 #include <assert.h>
   9 #include <string.h>
  10 #include <stdio.h>
  11
  12 #include <xcb/damage.h>
  13 #include <xcb/render.h>
  14 #include <xcb/xfixes.h>
  15 #include <xcb/composite.h>
  16
  17 typedef struct {
  18     xcb_atom_t               *atom;
  19     const char               *name;
  20     xcb_intern_atom_cookie_t  ck;
  21 } d_atom_query_t;
  22
  23 #define setup_extension(name) \
  24     xcb_##name##_query_version_cookie_t ck_##name;
  25
  26 #define find_extension_xfixes(dpy) &dpy->xfixes;
  27 #define find_extension_render(dpy) &dpy->render;
  28 #define find_extension_composite(dpy) &dpy->composite;
  29 #define find_extension_damage(dpy) &dpy->damage;
  30
  31 #define version_extension_xfixes \
  32   XCB_XFIXES_MAJOR_VERSION, XCB_XFIXES_MAJOR_VERSION
  33 #define version_extension_render \
  34   XCB_RENDER_MAJOR_VERSION, XCB_RENDER_MAJOR_VERSION
  35 #define version_extension_composite \
  36   XCB_COMPOSITE_MAJOR_VERSION, XCB_COMPOSITE_MAJOR_VERSION
  37 #define version_extension_damage \
  38   XCB_DAMAGE_MAJOR_VERSION, XCB_DAMAGE_MAJOR_VERSION
  39
  40 #define query_extension(dpy, name) \
  41 { \
  42     const xcb_query_extension_reply_t *rep;          \
  43     d_display_ext_t *ext; \
  44 \
  45     xcb_prefetch_extension_data(dpy->conn, &xcb_##name##_id);  \
  46     rep = xcb_get_extension_data(dpy->conn, &xcb_##name##_id); \
  47 \
  48     ext = find_extension_##name(dpy) \
  49     ext->present = rep && rep->present;          \
  50     ext->error   = rep ? rep->first_error : 0;   \
  51     ext->event   = rep ? rep->first_event : 0;   \
  52     ext->opcode  = rep ? rep->major_opcode : 0;  \
  53 \
  54     if (ext->present) \
  55         ck_##name = xcb_##name##_query_version(dpy->conn, \
  56                                                version_extension_##name); \
  57 }
  58
  59 #define reply_extension(dpy, name) \
  60 { \
  61     xcb_##name##_query_version_reply_t *rep; \
  62     d_display_ext_t *ext; \
  63 \
  64     ext = find_extension_##name(dpy) \
  65     if (ext->present) { \
  66         rep = xcb_##name##_query_version_reply(dpy->conn, ck_##name, NULL); \
  67         if (rep) { \
  68             ext->major_version = rep->major_version; \
  69             ext->minor_version = rep->minor_version; \
  70             free(rep); \
  71         } \
  72         else { \
  73             printf("error querying the %s extension's version\n", "##name##");\
  74             ext->present = FALSE; \
  75         } \
  76     } \
  77 }
  78
  79 static void
  80 query_atom(d_display_t *dpy, d_atom_query_t *q)
  81 {
  82     q->ck = xcb_intern_atom(dpy->conn, FALSE, strlen(q->name), q->name);
  83 }
  84
  85 static void
  86 reply_atom(d_display_t *dpy, d_atom_query_t *q)
  87 {
  88     xcb_intern_atom_reply_t *rep;
  89     rep = xcb_intern_atom_reply(dpy->conn, q->ck, NULL);
  90     if (rep) {
  91         *q->atom = rep->atom;
  92         free(rep);
  93     }
  94     else {
  95         printf("unable to query atom %s\n", q->name);
  96         *q->atom = 0;
  97     }
  98 }
  99
 100 static void
 101 query_statics(d_display_t *dpy)
 102 {
 103     d_atom_query_t atoms[] = {
 104         { .atom = &dpy->a.atom,
 105           .name = "ATOM" },
 106         { .atom = &dpy->a.cardinal,
 107           .name = "CARDINAL" },
 108         { .atom = &dpy->a.utf8_string,
 109           .name = "UTF8_STRING" },
 110         { .atom = &dpy->a.string,
 111           .name = "STRING" },
 112         { .atom = &dpy->a.pixmap,
 113           .name = "PIXMAP" },
 114         { .atom = &dpy->a.net_wm_window_type,
 115           .name = "_NET_WM_WINDOW_TYPE" },
 116         { .atom = &dpy->a.net_wm_window_type_desktop,
 117           .name = "_NET_WM_WINDOW_TYPE_DESKTOP" },
 118         { .atom = &dpy->a.net_wm_window_type_dock,
 119           .name = "_NET_WM_WINDOW_TYPE_DOCK" },
 120         { .atom = &dpy->a.net_wm_window_type_normal,
 121           .name = "_NET_WM_WINDOW_TYPE_NORMAL" },
 122         { .atom = &dpy->a.net_wm_window_type_dialog,
 123           .name = "_NET_WM_WINDOW_TYPE_DIALOG" },
 124         { .atom = &dpy->a.net_wm_window_type_toolbar,
 125           .name = "_NET_WM_WINDOW_TYPE_TOOLBAR" },
 126         { .atom = &dpy->a.net_wm_window_type_menu,
 127           .name = "_NET_WM_WINDOW_TYPE_MENU" },
 128         { .atom = &dpy->a.net_wm_window_type_utility,
 129           .name = "_NET_WM_WINDOW_TYPE_UTILITY" },
 130         { .atom = &dpy->a.net_wm_window_type_splash,
 131           .name = "_NET_WM_WINDOW_TYPE_SPLAH" },
 132         { .atom = &dpy->a.net_wm_window_type_tooltip,
 133           .name = "_NET_WM_WINDOW_TYPE_TOOLTIP" },
 134         { .atom = &dpy->a.net_wm_window_type_combo,
 135           .name = "_NET_WM_WINDOW_TYPE_COMBO" },
 136         { .atom = &dpy->a.net_wm_window_type_dropdown_menu,
 137           .name = "_NET_WM_WINDOW_TYPE_DROPDOWN_MENU" },
 138         { .atom = &dpy->a.net_wm_window_type_popup_menu,
 139           .name = "_NET_WM_WINDOW_TYPE_POPUP_MENU" },
 140         { .atom = &dpy->a.net_wm_window_type_notification,
 141           .name = "_NET_WM_WINDOW_TYPE_NOTIFICATION" },
 142         { .atom = NULL }
 143     };
 144     int i;
 145     setup_extension(xfixes);
 146     setup_extension(render);
 147     setup_extension(composite);
 148     setup_extension(damage);
 149
 150     query_extension(dpy, xfixes);
 151     query_extension(dpy, render);
 152     query_extension(dpy, composite);
 153     query_extension(dpy, damage);
 154
 155     for (i = 0; atoms[i].atom != NULL; ++i)
 156         query_atom(dpy, &atoms[i]);
 157
 158     xcb_flush(dpy->conn);
 159
 160     reply_extension(dpy, xfixes);
 161     reply_extension(dpy, render);
 162     reply_extension(dpy, composite);
 163     reply_extension(dpy, damage);
 164
 165     for (i = 0; atoms[i].atom != NULL; ++i)
 166         reply_atom(dpy, &atoms[i]);
 167 }
 168
 169 d_display_t*
 170 display_open(const char *name)
 171 {
 172     d_display_t *dpy = NULL;
 173     xcb_connection_t *conn;
 174
 175     conn = xcb_connect(name, NULL);
 176     if (conn && !xcb_connection_has_error(conn)) {
 177         dpy = malloc(sizeof(d_display_t));
 178         dpy->conn = conn;
 179         dpy->ref = 1;
 180         dpy->fd = xcb_get_file_descriptor(conn);
 181         dpy->screens = list_new();
 182
 183         query_statics(dpy);
 184     }
 185     return dpy;
 186 }
 187
 188 void
 189 display_ref(d_display_t *dpy)
 190 {
 191     ++dpy->ref;
 192 }
 193
 194 void
 195 display_unref(d_display_t *dpy)
 196 {
 197     if (dpy && --dpy->ref == 0) {
 198         d_list_it_t *it;
 199
 200         for (it = list_top(dpy->screens); it; it = it->next)
 201             screen_unref(it->data);
 202         list_unref(dpy->screens);
 203
 204         xcb_disconnect(dpy->conn);
 205         free(dpy);
 206     }
 207 }
 208
 209 void
 210 display_error(d_display_t *dpy, xcb_generic_error_t *ev)
 211 {
 212     const int major_opcode = ((xcb_request_error_t*)ev)->major_opcode;
 213     const int minor_opcode = ((xcb_request_error_t*)ev)->minor_opcode;
 214     const char *name, *req;
 215
 216     /* XXX check if we should ignore it (ev->full_sequence) */
 217
 218     (void)dpy;
 219
 220     name = NULL;
 221     switch (ev->error_code) {
 222     case XCB_REQUEST:   name = "BadRequest";   break;
 223     case XCB_VALUE:     name = "BadValue";     break;
 224     case XCB_WINDOW:    name = "BadWindow";    break;
 225     case XCB_PIXMAP:    name = "BadPixmap";    break;
 226     case XCB_MATCH:     name = "BadMatch";     break;
 227     case XCB_DRAWABLE:  name = "BadDrawable";  break;
 228     case XCB_G_CONTEXT: name = "BadGC";        break;
 229     default: break;
 230     }
 231     if (!name)
 232         switch (ev->error_code - dpy->xfixes.error) {
 233         case XCB_XFIXES_BAD_REGION: name = "BadRegion"; break;
 234         default: break;
 235         }
 236     if (!name)
 237         switch (ev->error_code - dpy->damage.error) {
 238         case XCB_DAMAGE_BAD_DAMAGE: name = "BadDamage"; break;
 239         default: break;
 240         }
 241     if (!name)
 242         switch (ev->error_code - dpy->render.error) {
 243         case XCB_RENDER_PICT_FORMAT: name = "BadPictFormat"; break;
 244         case XCB_RENDER_PICT_OP:     name = "BadPictOp"; break;
 245         case XCB_RENDER_PICTURE:     name = "BadPicture"; break;
 246         case XCB_RENDER_GLYPH_SET:   name = "BadGlyphSet"; break;
 247         case XCB_RENDER_GLYPH:       name = "BadGlyph"; break;
 248         default: break;
 249         }
 250
 251     req = NULL;
 252     if (major_opcode <= 127)
 253         switch (major_opcode) {
 254         case 1:  req = "CreateWindow";           break;
 255         case 2:  req = "ChangeWindowAttributes"; break;
 256         case 3:  req = "GetWindowAttributes";    break;
 257         case 14: req = "GetGeometry";            break;
 258         case 15: req = "QueryTree";              break;
 259         case 18: req = "ChangeProperty";         break;
 260         case 20: req = "GetProperty";            break;
 261         case 22: req = "SetSelectionOwner";      break;
 262         case 23: req = "GetSelectionOwner";      break;
 263         case 53: req = "CreatePixmap";           break;
 264         case 54: req = "FreePixmap";             break;
 265         case 55: req = "CreateGC";               break;
 266         case 56: req = "ChangeGC";               break;
 267         case 60: req = "FreeGC";                 break;
 268         case 72: req = "PutImage";               break;
 269         default: break;
 270         }
 271     else if (major_opcode == dpy->damage.opcode)
 272         switch (minor_opcode)
 273         {
 274         case 0: req = "DamageQueryVersion"; break;
 275         case 1: req = "DamageCreate";       break;
 276         case 2: req = "DamageDestroy";      break;
 277         case 3: req = "DamageSubtract";     break;
 278         default: break;
 279         }
 280     else if (major_opcode == dpy->render.opcode)
 281         switch (minor_opcode)
 282         {
 283         case 0:  req = "RenderQueryVersion";             break;
 284         case 1:  req = "RenderQueryPictFormats";         break;
 285         case 2:  req = "RenderQueryPictIndexValues";     break;
 286         case 4:  req = "RenderCreatePicture";            break;
 287         case 5:  req = "RenderChangePicture";            break;
 288         case 6:  req = "RenderSetPictureClipRectangles"; break;
 289         case 7:  req = "RenderFreePicture";              break;
 290         case 8:  req = "RenderComposite";                break;
 291         case 10: req = "RenderCompositeTrapezoids";      break;
 292         case 11: req = "RenderCompositeTriangles";       break;
 293         case 12: req = "RenderCompositeTriStrip";        break;
 294         case 13: req = "RenderCompositeTriFan";          break;
 295         case 17: req = "RenderCreateGlyphSet";           break;
 296         case 18: req = "RenderReferenceGlyphSet";        break;
 297         case 19: req = "RenderFreeGlyphSet";             break;
 298         case 20: req = "RenderAddGlyphs";                break;
 299         case 22: req = "RenderFreeGlyphs";               break;
 300         case 23: req = "RenderCompositeGlyphs8";         break;
 301         case 24: req = "RenderCompositeGlyphs16";        break;
 302         case 25: req = "RenderCompositeGlyphs32";        break;
 303         case 26: req = "RenderFillRectangles";           break;
 304         case 27: req = "RenderCreateCursor";             break;
 305         case 28: req = "RenderSetPictureTransform";      break;
 306         case 29: req = "RenderQueryFilters";             break;
 307         case 30: req = "RenderSetPictureFilter";         break;
 308         case 31: req = "RenderCreateAnimCursor";         break;
 309         case 32: req = "RenderAddTraps";                 break;
 310         case 33: req = "RenderCreateSolidFill";          break;
 311         case 34: req = "RenderLinearGradient";           break;
 312         case 35: req = "RenderRadialGradient";           break;
 313         case 36: req = "RenderConicalGradient";          break;
 314         default: break;
 315         }
 316     else if (major_opcode == dpy->composite.opcode)
 317         switch (minor_opcode)
 318         {
 319         case 0: req = "CompositeQueryVersion";               break;
 320         case 1: req = "CompositeRedirectWindow";             break;
 321         case 2: req = "CompositeRedirectSubwindows";         break;
 322         case 3: req = "CompositeUnredirectWindow";           break;
 323         case 4: req = "CompositeUnredirectSubwindows";       break;
 324         case 5: req = "CompositeCreateRegionFromBorderClip"; break;
 325         case 6: req = "CompositeNameWindowPixmap";           break;
 326         case 7: req = "CompositeGetOverlayWindow";           break;
 327         case 8: req = "CompositeReleaseOverlayWindow";       break;
 328         default: break;
 329         }
 330
 331     if (name && req)
 332         printf("XError: %s %s!\n",
 333                name, req);
 334     else if (name)
 335         printf("XError: %s major opcode %d minor opcode %d!\n",
 336                name, major_opcode, minor_opcode);
 337     else
 338         printf("XError: code %d major opcode %d minor opcode %d!\n",
 339                ev->error_code, major_opcode, minor_opcode);
 340
 341     //abort();
 342 }
 343
 344 int
 345 display_claim_screens(d_display_t *dpy)
 346 {
 347     static const xcb_setup_t *setup;
 348     xcb_screen_iterator_t it;
 349     int i;
 350     d_screen_t *sc;
 351
 352     setup = xcb_get_setup(dpy->conn);
 353
 354     i = 0;
 355     for (it = xcb_setup_roots_iterator(setup); it.rem; xcb_screen_next(&it)) {
 356         sc = screen_new(dpy, i++, it.data);
 357         if (screen_register(sc)) {
 358             list_append(dpy->screens, sc);
 359             printf(_("managing screen %d\n"), sc->num);
 360         }
 361         else
 362             screen_unref(sc);
 363     }
 364     return list_length(dpy->screens);
 365 }
 366
 367 d_screen_t*
 368 display_screen_from_root(d_display_t *dpy, xcb_window_t root)
 369 {
 370     d_list_it_t *it;
 371
 372     for (it = list_top(dpy->screens); it; it = it->next) {
 373         d_screen_t *sc = it->data;
 374         if (sc->super.root == root)
 375             return sc;
 376     }
 377     assert(0);
 378     return NULL;
 379 }