src/motif/bmpmotif.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/motif/bmpmotif.cpp
   3 // Purpose:     wxBitmap
   4 // Author:      Julian Smart, originally in bitmap.cpp
   5 // Modified by:
   6 // Created:     25/03/2003
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #include "wx/motif/bmpmotif.h"
  16
  17 #ifndef WX_PRECOMP
  18     #include "wx/math.h"
  19 #endif
  20
  21 #ifdef __VMS__
  22 #pragma message disable nosimpint
  23 #endif
  24 #include <Xm/Xm.h>
  25 #ifdef __VMS__
  26 #pragma message enable nosimpint
  27 #endif
  28
  29 #include "wx/motif/private.h"
  30
  31 #if wxHAVE_LIB_XPM
  32     #include <X11/xpm.h>
  33 #endif
  34
  35 Pixmap XCreateInsensitivePixmap( Display *display, Pixmap pixmap );
  36
  37 static inline wxCharBuffer GetCacheImageName(WXImage image)
  38 {
  39     return wxString::Format(wxT("wxBitmap_%p"), image).ToAscii();
  40 }
  41
  42 wxBitmapCache::~wxBitmapCache()
  43 {
  44     if( m_display )
  45     {
  46         Screen* screen = DefaultScreenOfDisplay( (Display*)m_display );
  47
  48         if( m_labelPixmap )
  49             XmDestroyPixmap( screen, (Pixmap)m_labelPixmap );
  50
  51         if( m_armPixmap )
  52             XmDestroyPixmap( screen, (Pixmap)m_armPixmap );
  53
  54         if( m_insensPixmap )
  55             XmDestroyPixmap( screen, (Pixmap)m_insensPixmap );
  56
  57     }
  58
  59     if( m_image )
  60     {
  61         XmUninstallImage( (XImage*)m_image );
  62         XtFree( (char*)(XImage*)m_image );
  63     }
  64 }
  65
  66 void wxBitmapCache::SetBitmap( const wxBitmap& bitmap )
  67 {
  68     if ( !m_bitmap.IsSameAs(bitmap) )
  69     {
  70         InvalidateCache();
  71         m_bitmap = bitmap;
  72
  73         if( m_image )
  74         {
  75             XmUninstallImage( (XImage*)m_image );
  76             XtFree( (char*)(XImage*)m_image );
  77             m_image = NULL;
  78         }
  79     }
  80 }
  81
  82 void wxBitmapCache::InvalidateCache()
  83 {
  84     m_recalcPixmaps.label  = true;
  85     m_recalcPixmaps.arm    = true;
  86     m_recalcPixmaps.insens = true;
  87 }
  88
  89 void wxBitmapCache::SetColoursChanged()
  90 {
  91     InvalidateCache();
  92 }
  93
  94 void wxBitmapCache::CreateImageIfNeeded( WXWidget w )
  95 {
  96     if( m_image )
  97         return;
  98
  99     m_display = w ?
 100                 (WXDisplay*)XtDisplay( (Widget)w ) :
 101                 (WXDisplay*)wxGetDisplay();
 102
 103     XImage *ximage = XGetImage( (Display*)m_display,
 104                                 (Drawable)m_bitmap.GetDrawable(),
 105                                 0, 0,
 106                                 m_bitmap.GetWidth(), m_bitmap.GetHeight(),
 107                                 AllPlanes, ZPixmap );
 108
 109     m_image = (WXImage*)ximage;
 110
 111     if( m_image )
 112     {
 113         XmInstallImage( ximage, GetCacheImageName(m_image).data() );
 114     }
 115 }
 116
 117 WXPixmap wxBitmapCache::GetPixmapFromCache(WXWidget w)
 118 {
 119     Widget widget = (Widget)w;
 120     while( XmIsGadget( widget ) )
 121         widget = XtParent( widget );
 122
 123     WXPixel fg, bg;
 124     XtVaGetValues( widget,
 125                    XmNbackground, &bg,
 126                    XmNforeground, &fg,
 127                    NULL );
 128
 129     Screen* screen = DefaultScreenOfDisplay( (Display*)m_display );
 130     return (WXPixmap)XmGetPixmap(screen, GetCacheImageName(m_image).data(), fg, bg);
 131 }
 132
 133 WXPixmap wxBitmapCache::GetLabelPixmap( WXWidget w )
 134 {
 135     if( m_labelPixmap && !m_recalcPixmaps.label )
 136         return m_labelPixmap;
 137
 138     CreateImageIfNeeded( w );
 139
 140     Screen* screen = DefaultScreenOfDisplay( (Display*)m_display );
 141
 142     if( m_labelPixmap )
 143         XmDestroyPixmap( screen, (Pixmap)m_labelPixmap );
 144
 145     if( !m_image )
 146         return (WXPixmap)NULL;
 147
 148     m_labelPixmap = GetPixmapFromCache(w);
 149     m_recalcPixmaps.label = !m_labelPixmap;
 150     return m_labelPixmap;
 151 }
 152
 153 WXPixmap wxBitmapCache::GetArmPixmap( WXWidget w )
 154 {
 155     if( m_armPixmap && !m_recalcPixmaps.arm )
 156         return m_armPixmap;
 157
 158     CreateImageIfNeeded( w );
 159
 160     Screen* screen = DefaultScreenOfDisplay( (Display*)m_display );
 161
 162     if( m_armPixmap )
 163         XmDestroyPixmap( screen, (Pixmap)m_armPixmap );
 164
 165     if( !m_image )
 166         return (WXPixmap)NULL;
 167
 168     m_armPixmap = GetPixmapFromCache(w);
 169     m_recalcPixmaps.arm = !m_armPixmap;
 170     return m_armPixmap;
 171 }
 172
 173 WXPixmap wxBitmapCache::GetInsensPixmap( WXWidget w )
 174 {
 175     if( m_insensPixmap && !m_recalcPixmaps.insens )
 176         return m_insensPixmap;
 177
 178     CreateImageIfNeeded( w );
 179
 180     Screen* screen = DefaultScreenOfDisplay( (Display*)m_display );
 181
 182     if( m_insensPixmap )
 183         XmDestroyPixmap( screen, (Pixmap)m_insensPixmap );
 184
 185     if( !m_image )
 186         return (WXPixmap)NULL;
 187
 188     m_insensPixmap =
 189         (WXPixmap)XCreateInsensitivePixmap( (Display*)m_display,
 190                                             (Pixmap)m_bitmap.GetDrawable() );
 191
 192     m_recalcPixmaps.insens = !m_insensPixmap;
 193     return m_insensPixmap;
 194 }
 195
 196 //////////////////////////////////////////////////////////////////////////////
 197 // Utility function
 198 //////////////////////////////////////////////////////////////////////////////
 199
 200 /****************************************************************************
 201
 202   NAME
 203   XCreateInsensitivePixmap - create a grayed-out copy of a pixmap
 204
 205   SYNOPSIS
 206   Pixmap XCreateInsensitivePixmap( Display *display, Pixmap pixmap )
 207
 208   DESCRIPTION
 209   This function creates a grayed-out copy of the argument pixmap, suitable
 210   for use as a XmLabel's XmNlabelInsensitivePixmap resource.
 211
 212   RETURN VALUES
 213   The return value is the new Pixmap id or zero on error.  Errors include
 214   a NULL display argument or an invalid Pixmap argument.
 215
 216   ERRORS
 217   If one of the XLib functions fail, it will produce a X error.  The
 218   default X error handler prints a diagnostic and calls exit().
 219
 220   SEE ALSO
 221   XCopyArea(3), XCreateBitmapFromData(3), XCreateGC(3), XCreatePixmap(3),
 222   XFillRectangle(3), exit(2)
 223
 224   AUTHOR
 225   John R Veregge - john@puente.jpl.nasa.gov
 226   Advanced Engineering and Prototyping Group (AEG)
 227   Information Systems Technology Section (395)
 228   Jet Propulsion Lab - Calif Institute of Technology
 229
 230 *****************************************************************************/
 231
 232 Pixmap
 233 XCreateInsensitivePixmap( Display *display, Pixmap pixmap )
 234
 235 {
 236     static char stipple_data[] =
 237         {
 238             0x55, 0x55, 0xAA, 0xAA, 0x55, 0x55, 0xAA, 0xAA,
 239             0x55, 0x55, 0xAA, 0xAA, 0x55, 0x55, 0xAA, 0xAA,
 240             0x55, 0x55, 0xAA, 0xAA, 0x55, 0x55, 0xAA, 0xAA,
 241             0x55, 0x55, 0xAA, 0xAA, 0x55, 0x55, 0xAA, 0xAA
 242         };
 243     GC        gc;
 244     Pixmap    ipixmap, stipple;
 245     unsigned    width, height, depth;
 246
 247     Window    window;    /* These return values */
 248     unsigned    border;    /* from XGetGeometry() */
 249     int        x, y;    /* are not needed.     */
 250
 251     ipixmap = 0;
 252
 253     if ( NULL == display || 0 == pixmap )
 254         return ipixmap;
 255
 256     if ( 0 == XGetGeometry( display, pixmap, &window, &x, &y,
 257                 &width, &height, &border, &depth )
 258        )
 259         return ipixmap; /* BadDrawable: probably an invalid pixmap */
 260
 261     /* Get the stipple pixmap to be used to 'gray-out' the argument pixmap.
 262      */
 263     stipple = XCreateBitmapFromData( display, pixmap, stipple_data, 16, 16 );
 264     if ( 0 != stipple )
 265     {
 266         gc = XCreateGC( display, pixmap, (XtGCMask)0, NULL );
 267         if ( NULL != gc )
 268         {
 269             /* Create an identical copy of the argument pixmap.
 270              */
 271             ipixmap = XCreatePixmap( display, pixmap, width, height, depth );
 272             if ( 0 != ipixmap )
 273             {
 274                 /* Copy the argument pixmap into the new pixmap.
 275                  */
 276                 XCopyArea( display, pixmap, ipixmap,
 277                         gc, 0, 0, width, height, 0, 0 );
 278
 279                 /* Refill the new pixmap using the stipple algorithm/pixmap.
 280                  */
 281                 XSetStipple( display, gc, stipple );
 282                 XSetFillStyle( display, gc, FillStippled );
 283                 XFillRectangle( display, ipixmap, gc, 0, 0, width, height );
 284             }
 285             XFreeGC( display, gc );
 286         }
 287         XFreePixmap( display, stipple );
 288     }
 289     return ipixmap;
 290 }