Dogcows Code - chaz/openbox/blob - otk/surface.cc

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #ifdef    HAVE_CONFIG_H
   4 #  include "../config.h"
   5 #endif // HAVE_CONFIG_H
   6
   7 #include "surface.hh"
   8 #include "display.hh"
   9 #include "screeninfo.hh"
  10
  11 extern "C" {
  12 #include <X11/Xutil.h>
  13 }
  14
  15 namespace otk {
  16
  17 Surface::Surface(int screen)
  18   : _screen(screen),
  19     _size(1, 1),
  20     _im(0),
  21     _pm(None),
  22     _xftdraw(0)
  23 {
  24   createObjects();
  25 }
  26
  27 Surface::Surface(int screen, const Point &size)
  28   : _screen(screen),
  29     _size(size),
  30     _im(0),
  31     _pm(None),
  32     _xftdraw(0)
  33 {
  34   createObjects();
  35 }
  36
  37 Surface::~Surface()
  38 {
  39   destroyObjects();
  40 }
  41
  42 void Surface::createObjects()
  43 {
  44   assert(!_im); assert(_pm == None); assert(!_xftdraw);
  45
  46   const ScreenInfo *info = display->screenInfo(_screen);
  47
  48   _im = XCreateImage(**display, info->visual(), info->depth(),
  49                      ZPixmap, 0, NULL, _size.x(), _size.y(), 32, 0);
  50
  51   _pm = XCreatePixmap(**display, info->rootWindow(), _size.x(), _size.y(),
  52                       info->depth());
  53
  54   _xftdraw = XftDrawCreate(**display, _pm, info->visual(), info->colormap());
  55 }
  56
  57 void Surface::destroyObjects()
  58 {
  59   assert(_im); assert(_pm != None); assert(_xftdraw);
  60
  61   XftDrawDestroy(_xftdraw);
  62   _xftdraw = 0;
  63
  64   XFreePixmap(**display, _pm);
  65   _pm = None;
  66
  67   // do the delete ourselves cuz we alloc it with new not malloc
  68   delete [] _im->data;
  69   _im->data = NULL;
  70   XDestroyImage(_im);
  71   _im = 0;
  72 }
  73
  74 void Surface::setSize(int w, int h)
  75 {
  76   if (w == _size.x() && h == _size.y()) return; // no change
  77
  78   _size.setPoint(w, h);
  79   destroyObjects();
  80   createObjects();
  81 }
  82
  83 }