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