src/x11/utilsx.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/x11/utilsx.cpp
   3 // Purpose:     Private functions common to X11 and Motif ports
   4 // Author:      Mattia Barbon
   5 // Modified by:
   6 // Created:     05/04/03
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Mattia Barbon
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // for compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __VMS
  16 #define XShapeQueryExtension XSHAPEQUERYEXTENSION
  17 #define XtDisplay XTDISPLAY
  18 #endif
  19
  20 #include "wx/x11/privx.h"
  21
  22 #ifdef HAVE_XSHAPE
  23
  24     #ifndef WX_PRECOMP
  25         #include "wx/bitmap.h"
  26         #include "wx/region.h"
  27     #endif
  28
  29     #ifdef __VMS
  30         #include "wx/vms_x_fix.h"
  31         #include <X11/shape.h>
  32     #else
  33         #include <X11/extensions/shape.h>
  34     #endif
  35
  36     #include "wx/dcmemory.h"
  37 #endif
  38
  39 // ----------------------------------------------------------------------------
  40 // XShape code
  41 // ----------------------------------------------------------------------------
  42
  43 #ifdef HAVE_XSHAPE
  44
  45 bool wxDoSetShape( Display* xdisplay,
  46                    Window xwindow,
  47                    const wxRegion& region )
  48 {
  49     int dummy1, dummy2;
  50
  51     if( !XShapeQueryExtension( xdisplay, &dummy1, &dummy2 ) )
  52         return false;
  53
  54     if( region.IsEmpty() )
  55     {
  56         XShapeCombineMask( xdisplay, xwindow, ShapeBounding, 0, 0,
  57                            None, ShapeSet );
  58     }
  59     else
  60     {
  61         // wxRegion::ConvertToBitmap gives us the wrong Pixmap:
  62         // polichrome and with black and whire reversed
  63         wxRect box = region.GetBox();
  64         wxBitmap bmp(box.GetRight(), box.GetBottom(), 1);
  65         wxMemoryDC dc;
  66         dc.SelectObject(bmp);
  67         dc.SetBackground(*wxBLACK_BRUSH);
  68         dc.Clear();
  69         dc.SetClippingRegion(region);
  70         dc.SetBackground(*wxWHITE_BRUSH);
  71         dc.Clear();
  72         dc.SelectObject(wxNullBitmap);
  73
  74         XShapeCombineMask( xdisplay, xwindow, ShapeBounding, 0, 0,
  75                            (Pixmap)bmp.GetDrawable(), ShapeSet );
  76     }
  77
  78     return true;
  79 }
  80
  81 #else
  82
  83 bool wxDoSetShape( Display* WXUNUSED(xdisplay),
  84                    Window WXUNUSED(xwindow),
  85                    const wxRegion& WXUNUSED(region) )
  86 {
  87     return false;
  88 }
  89
  90 #endif
  91
  92 // ----------------------------------------------------------------------------
  93 // wxXVisualInfo
  94 // ----------------------------------------------------------------------------
  95
  96 #if !wxUSE_NANOX
  97
  98 bool wxFillXVisualInfo( wxXVisualInfo* vi, Display* dpy )
  99 {
 100     int xscreen = DefaultScreen( dpy );
 101     Visual* vis = DefaultVisual( dpy, xscreen );
 102     int bpp = DefaultDepth( dpy, xscreen );
 103
 104     XVisualInfo vinfo_template;
 105     XVisualInfo *vinfo;
 106
 107     vinfo_template.visual = vis;
 108     vinfo_template.visualid = XVisualIDFromVisual( vis );
 109     vinfo_template.depth = bpp;
 110     int nitem = 0;
 111
 112     vinfo = XGetVisualInfo( dpy, VisualIDMask|VisualDepthMask,
 113                             &vinfo_template, &nitem );
 114
 115     wxCHECK_MSG( vinfo, false, wxT("no visual") );
 116
 117     vi->Init( dpy, vinfo );
 118
 119     XFree(vinfo);
 120
 121     return true;
 122 }
 123
 124 inline int ABS(int x) { return x < 0 ? -x : x; }
 125
 126 static void wxCalcPrecAndShift( unsigned long mask, int *shift, int *prec )
 127 {
 128     *shift = 0;
 129     *prec = 0;
 130
 131     while (!(mask & 0x1))
 132     {
 133         (*shift)++;
 134         mask >>= 1;
 135     }
 136
 137     while (mask & 0x1)
 138     {
 139         (*prec)++;
 140         mask >>= 1;
 141     }
 142 }
 143
 144 wxXVisualInfo::wxXVisualInfo()
 145 {
 146     m_visualColormap = NULL;
 147     m_colorCube = NULL;
 148 }
 149
 150 wxXVisualInfo::~wxXVisualInfo()
 151 {
 152     if (m_colorCube)
 153         free( m_colorCube );
 154
 155     if (m_visualColormap)
 156         delete [] (XColor*)m_visualColormap;
 157 }
 158
 159 void wxXVisualInfo::Init( Display* dpy, XVisualInfo* vi )
 160 {
 161     m_visualType = vi->visual->c_class;
 162     m_visualScreen = vi->screen;
 163
 164     m_visualRedMask = vi->red_mask;
 165     m_visualGreenMask = vi->green_mask;
 166     m_visualBlueMask = vi->blue_mask;
 167
 168     if (m_visualType != GrayScale && m_visualType != PseudoColor)
 169     {
 170         wxCalcPrecAndShift( m_visualRedMask, &m_visualRedShift,
 171                             &m_visualRedPrec );
 172         wxCalcPrecAndShift( m_visualGreenMask, &m_visualGreenShift,
 173                             &m_visualGreenPrec );
 174         wxCalcPrecAndShift( m_visualBlueMask, &m_visualBlueShift,
 175                             &m_visualBluePrec );
 176     }
 177
 178     m_visualDepth = vi->depth;
 179     if (vi->depth == 16)
 180         vi->depth = m_visualRedPrec + m_visualGreenPrec + m_visualBluePrec;
 181
 182     m_visualColormapSize = vi->colormap_size;
 183
 184     if (m_visualDepth > 8)
 185         return;
 186
 187     m_visualColormap = new XColor[m_visualColormapSize];
 188     XColor* colors = (XColor*) m_visualColormap;
 189
 190     for (int i = 0; i < m_visualColormapSize; i++)
 191         colors[i].pixel = i;
 192
 193     XQueryColors( dpy, DefaultColormap(dpy, vi->screen),
 194                   colors, m_visualColormapSize );
 195
 196     m_colorCube = (unsigned char*)malloc(32 * 32 * 32);
 197
 198     for (int r = 0; r < 32; r++)
 199     {
 200         for (int g = 0; g < 32; g++)
 201         {
 202             for (int b = 0; b < 32; b++)
 203             {
 204                 int rr = (r << 3) | (r >> 2);
 205                 int gg = (g << 3) | (g >> 2);
 206                 int bb = (b << 3) | (b >> 2);
 207
 208                 int index = -1;
 209
 210                 if (colors)
 211                 {
 212                     int max = 3 * 65536;
 213
 214                     for (int i = 0; i < m_visualColormapSize; i++)
 215                     {
 216                         int rdiff = ((rr << 8) - colors[i].red);
 217                         int gdiff = ((gg << 8) - colors[i].green);
 218                         int bdiff = ((bb << 8) - colors[i].blue);
 219                         int sum = ABS (rdiff) + ABS (gdiff) + ABS (bdiff);
 220                         if (sum < max)
 221                         {
 222                             index = i; max = sum;
 223                         }
 224                     }
 225                 }
 226                 else
 227                 {
 228                     // assume 8-bit true or static colors. this really exists
 229                     index = (r >> (5 - m_visualRedPrec)) << m_visualRedShift;
 230                     index |= (g >> (5 - m_visualGreenPrec)) << m_visualGreenShift;
 231                     index |= (b >> (5 - m_visualBluePrec)) << m_visualBlueShift;
 232                 }
 233                 m_colorCube[ (r*1024) + (g*32) + b ] = (unsigned char)index;
 234             }
 235         }
 236     }
 237 }
 238
 239 #endif // !wxUSE_NANOX