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

   1 // -*- mode: C++; indent-tabs-mode: nil; c-basic-offset: 2; -*-
   2
   3 #include "config.h"
   4
   5 #include "surface.hh"
   6 #include "display.hh"
   7 #include "screeninfo.hh"
   8 #include "rendercolor.hh"
   9
  10 extern "C" {
  11 #include <X11/Xutil.h>
  12 #include <cstring>
  13 }
  14
  15 namespace otk {
  16
  17 Surface::Surface(int screen, const Size &size)
  18   : _screen(screen),
  19     _size(size),
  20     _pixel_data(new pixel32[size.width()*size.height()]),
  21     _pixmap(None),
  22     _xftdraw(0)
  23 {
  24 }
  25
  26 Surface::~Surface()
  27 {
  28   destroyObjects();
  29   delete [] _pixel_data;
  30 }
  31
  32 void Surface::setPixmap(const RenderColor &color)
  33 {
  34   if (_pixmap == None)
  35     createObjects();
  36
  37   XFillRectangle(**display, _pixmap, color.gc(), 0, 0,
  38                  _size.width(), _size.height());
  39
  40   pixel32 val = 0; // XXX set this from the color and shift amounts!
  41   for (unsigned int i = 0, s = _size.width() * _size.height(); i < s; ++i) {
  42     unsigned char *p = (unsigned char*)&_pixel_data[i];
  43     *p = (unsigned char) (val >> 24);
  44     *++p = (unsigned char) (val >> 16);
  45     *++p = (unsigned char) (val >> 8);
  46     *++p = (unsigned char) val;
  47   }
  48 }
  49
  50 void Surface::setPixmap(XImage *image)
  51 {
  52   assert(image->width == _size.width());
  53   assert(image->height == _size.height());
  54
  55   if (_pixmap == None)
  56     createObjects();
  57
  58   XPutImage(**display, _pixmap, DefaultGC(**display, _screen),
  59             image, 0, 0, 0, 0, _size.width(), _size.height());
  60 }
  61
  62 void Surface::createObjects()
  63 {
  64   assert(_pixmap == None); assert(!_xftdraw);
  65
  66   const ScreenInfo *info = display->screenInfo(_screen);
  67
  68   _pixmap = XCreatePixmap(**display, info->rootWindow(),
  69                           _size.width(), _size.height(), info->depth());
  70   assert(_pixmap != None);
  71
  72   _xftdraw = XftDrawCreate(**display, _pixmap,
  73                            info->visual(), info->colormap());
  74   assert(_xftdraw);
  75 }
  76
  77 void Surface::destroyObjects()
  78 {
  79   if (_xftdraw) {
  80     XftDrawDestroy(_xftdraw);
  81     _xftdraw = 0;
  82   }
  83
  84   if (_pixmap != None) {
  85     XFreePixmap(**display, _pixmap);
  86     _pixmap = None;
  87   }
  88 }
  89
  90 }