src/lib/ecore_x/xcb/ecore_xcb_damage.c

   1 #include "ecore_xcb_private.h"
   2 # ifdef ECORE_XCB_DAMAGE
   3 #  include <xcb/damage.h>
   4 # endif
   5
   6 /* local variables */
   7 static Eina_Bool _damage_avail = EINA_FALSE;
   8
   9 /* external variables */
  10 int _ecore_xcb_event_damage = -1;
  11
  12 void
  13 _ecore_xcb_damage_init(void)
  14 {
  15    LOGFN(__FILE__, __LINE__, __FUNCTION__);
  16
  17 #ifdef ECORE_XCB_DAMAGE
  18    xcb_prefetch_extension_data(_ecore_xcb_conn, &xcb_damage_id);
  19 #endif
  20 }
  21
  22 void
  23 _ecore_xcb_damage_finalize(void)
  24 {
  25 #ifdef ECORE_XCB_DAMAGE
  26    const xcb_query_extension_reply_t *ext_reply;
  27 #endif
  28
  29    LOGFN(__FILE__, __LINE__, __FUNCTION__);
  30
  31 #ifdef ECORE_XCB_DAMAGE
  32    ext_reply = xcb_get_extension_data(_ecore_xcb_conn, &xcb_damage_id);
  33    if ((ext_reply) && (ext_reply->present))
  34      {
  35         xcb_damage_query_version_cookie_t cookie;
  36         xcb_damage_query_version_reply_t *reply;
  37
  38         cookie =
  39           xcb_damage_query_version_unchecked(_ecore_xcb_conn,
  40                                              XCB_DAMAGE_MAJOR_VERSION,
  41                                              XCB_DAMAGE_MINOR_VERSION);
  42         reply = xcb_damage_query_version_reply(_ecore_xcb_conn, cookie, NULL);
  43         if (reply)
  44           {
  45              _damage_avail = EINA_TRUE;
  46              free(reply);
  47           }
  48
  49         if (_damage_avail)
  50           _ecore_xcb_event_damage = ext_reply->first_event;
  51      }
  52 #endif
  53 }
  54
  55 /**
  56  * @defgroup Ecore_X_Damage_Group X Damage Extension Functions
  57  *
  58  * Functions related to the X Damage Extension.
  59  */
  60
  61 EAPI Eina_Bool
  62 ecore_x_damage_query(void)
  63 {
  64    return _damage_avail;
  65 }
  66
  67 /**
  68  * Create a damage object
  69  *
  70  * @param drawable The drawable to monitor
  71  * @param level The level of the damage report
  72  * @return The damage object
  73  *
  74  * Creates a damage object to monitor changes to @p drawable,
  75  * with the level @p level.
  76  *
  77  * @ingroup Ecore_X_Damage_Group
  78  */
  79 EAPI Ecore_X_Damage
  80 ecore_x_damage_new(Ecore_X_Drawable            drawable,
  81                    Ecore_X_Damage_Report_Level level)
  82 {
  83    Ecore_X_Damage damage = 0;
  84
  85    LOGFN(__FILE__, __LINE__, __FUNCTION__);
  86    CHECK_XCB_CONN;
  87
  88    if (!_damage_avail) return 0;
  89
  90 #ifdef ECORE_XCB_DAMAGE
  91    damage = xcb_generate_id(_ecore_xcb_conn);
  92    xcb_damage_create(_ecore_xcb_conn, damage, drawable, level);
  93 //   ecore_x_flush();
  94 #endif
  95
  96    return damage;
  97 }
  98
  99 /**
 100  * Destroy a damage object
 101  *
 102  * @param damage The damage object to destroy
 103  *
 104  * Destroys the damage object @p damage
 105  *
 106  * @ingroup Ecore_X_Damage_Group
 107  */
 108 EAPI void
 109 ecore_x_damage_free(Ecore_X_Damage damage)
 110 {
 111    LOGFN(__FILE__, __LINE__, __FUNCTION__);
 112    CHECK_XCB_CONN;
 113
 114    if (!_damage_avail) return;
 115
 116 #ifdef ECORE_XCB_DAMAGE
 117    xcb_damage_destroy(_ecore_xcb_conn, damage);
 118 //   ecore_x_flush();
 119 #endif
 120 }
 121
 122 /**
 123  * Synchronously modifies the region
 124  *
 125  * @param damage The damage object to destroy
 126  * @param repair The repair region
 127  * @param parts The parts region
 128  *
 129  * Synchronously modifies the regions in the following manner:
 130  * If @p repair is @c XCB_NONE:
 131  *   1) parts = damage
 132  *   2) damage = \<empty\>
 133  * Otherwise:
 134  *   1) parts = damage INTERSECT repair
 135  *   2) damage = damage - parts
 136  *   3) Generate DamageNotify for remaining damage areas
 137  *
 138  * @ingroup Ecore_X_Damage_Group
 139  */
 140 EAPI void
 141 ecore_x_damage_subtract(Ecore_X_Damage damage,
 142                         Ecore_X_Region repair,
 143                         Ecore_X_Region parts)
 144 {
 145    LOGFN(__FILE__, __LINE__, __FUNCTION__);
 146    CHECK_XCB_CONN;
 147
 148    if (!_damage_avail) return;
 149
 150 #ifdef ECORE_XCB_DAMAGE
 151    xcb_damage_subtract(_ecore_xcb_conn, damage, repair, parts);
 152 //   ecore_x_flush();
 153 #endif
 154 }
 155