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  * @ingroup Ecore_X_Group
  58  *
  59  * Functions related to the X Damage Extension.
  60  */
  61
  62 EAPI Eina_Bool
  63 ecore_x_damage_query(void)
  64 {
  65    return _damage_avail;
  66 }
  67
  68 /**
  69  * Create a damage object
  70  *
  71  * @param drawable The drawable to monitor
  72  * @param level The level of the damage report
  73  * @return The damage object
  74  *
  75  * Creates a damage object to monitor changes to @p drawable,
  76  * with the level @p level.
  77  *
  78  * @ingroup Ecore_X_Damage_Group
  79  */
  80 EAPI Ecore_X_Damage
  81 ecore_x_damage_new(Ecore_X_Drawable            drawable,
  82                    Ecore_X_Damage_Report_Level level)
  83 {
  84    Ecore_X_Damage damage = 0;
  85
  86    LOGFN(__FILE__, __LINE__, __FUNCTION__);
  87    CHECK_XCB_CONN;
  88
  89    if (!_damage_avail) return 0;
  90
  91 #ifdef ECORE_XCB_DAMAGE
  92    damage = xcb_generate_id(_ecore_xcb_conn);
  93    xcb_damage_create(_ecore_xcb_conn, damage, drawable, level);
  94 //   ecore_x_flush();
  95 #endif
  96
  97    return damage;
  98 }
  99
 100 /**
 101  * Destroy a damage object
 102  *
 103  * @param damage The damage object to destroy
 104  *
 105  * Destroys the damage object @p damage
 106  *
 107  * @ingroup Ecore_X_Damage_Group
 108  */
 109 EAPI void
 110 ecore_x_damage_free(Ecore_X_Damage damage)
 111 {
 112    LOGFN(__FILE__, __LINE__, __FUNCTION__);
 113    CHECK_XCB_CONN;
 114
 115    if (!_damage_avail) return;
 116
 117 #ifdef ECORE_XCB_DAMAGE
 118    xcb_damage_destroy(_ecore_xcb_conn, damage);
 119 //   ecore_x_flush();
 120 #endif
 121 }
 122
 123 /**
 124  * Synchronously modifies the region
 125  *
 126  * @param damage The damage object to destroy
 127  * @param repair The repair region
 128  * @param parts The parts region
 129  *
 130  * Synchronously modifies the regions in the following manner:
 131  * If @p repair is @c XCB_NONE:
 132  *   1) parts = damage
 133  *   2) damage = \<empty\>
 134  * Otherwise:
 135  *   1) parts = damage INTERSECT repair
 136  *   2) damage = damage - parts
 137  *   3) Generate DamageNotify for remaining damage areas
 138  *
 139  * @ingroup Ecore_X_Damage_Group
 140  */
 141 EAPI void
 142 ecore_x_damage_subtract(Ecore_X_Damage damage,
 143                         Ecore_X_Region repair,
 144                         Ecore_X_Region parts)
 145 {
 146    LOGFN(__FILE__, __LINE__, __FUNCTION__);
 147    CHECK_XCB_CONN;
 148
 149    if (!_damage_avail) return;
 150
 151 #ifdef ECORE_XCB_DAMAGE
 152    xcb_damage_subtract(_ecore_xcb_conn, damage, repair, parts);
 153 //   ecore_x_flush();
 154 #endif
 155 }
 156