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   freePixelData();
  30 }
  31
  32 void Surface::freePixelData()
  33 {
  34   if (_pixel_data) {
  35     delete [] _pixel_data;
  36     _pixel_data = 0;
  37   }
  38 }
  39
  40 void Surface::setPixmap(const RenderColor &color)
  41 {
  42   assert(_pixel_data);
  43   if (_pixmap == None)
  44     createObjects();
  45
  46   XFillRectangle(**display, _pixmap, color.gc(), 0, 0,
  47                  _size.width(), _size.height());
  48
  49   pixel32 val = 0; // XXX set this from the color and shift amounts!
  50   for (unsigned int i = 0, s = _size.width() * _size.height(); i < s; ++i) {
  51     unsigned char *p = (unsigned char*)&_pixel_data[i];
  52     *p = (unsigned char) (val >> 24);
  53     *++p = (unsigned char) (val >> 16);
  54     *++p = (unsigned char) (val >> 8);
  55     *++p = (unsigned char) val;
  56   }
  57 }
  58
  59 void Surface::setPixmap(XImage *image)
  60 {
  61   assert(_pixel_data);
  62   assert(image->width == _size.width());
  63   assert(image->height == _size.height());
  64
  65   if (_pixmap == None)
  66     createObjects();
  67
  68   XPutImage(**display, _pixmap, DefaultGC(**display, _screen),
  69             image, 0, 0, 0, 0, _size.width(), _size.height());
  70 }
  71
  72 void Surface::createObjects()
  73 {
  74   assert(_pixmap == None); assert(!_xftdraw);
  75
  76   const ScreenInfo *info = display->screenInfo(_screen);
  77
  78   _pixmap = XCreatePixmap(**display, info->rootWindow(),
  79                           _size.width(), _size.height(), info->depth());
  80   assert(_pixmap != None);
  81
  82   _xftdraw = XftDrawCreate(**display, _pixmap,
  83                            info->visual(), info->colormap());
  84   assert(_xftdraw);
  85 }
  86
  87 void Surface::destroyObjects()
  88 {
  89   if (_xftdraw) {
  90     XftDrawDestroy(_xftdraw);
  91     _xftdraw = 0;
  92   }
  93
  94   if (_pixmap != None) {
  95     XFreePixmap(**display, _pixmap);
  96     _pixmap = None;
  97   }
  98 }
  99
 100 }