src/glw/GLwDrawA.c

   1 /*
   2  * (c) Copyright 1993, Silicon Graphics, Inc.
   3  * ALL RIGHTS RESERVED
   4  * Permission to use, copy, modify, and distribute this software for
   5  * any purpose and without fee is hereby granted, provided that the above
   6  * copyright notice appear in all copies and that both the copyright notice
   7  * and this permission notice appear in supporting documentation, and that
   8  * the name of Silicon Graphics, Inc. not be used in advertising
   9  * or publicity pertaining to distribution of the software without specific,
  10  * written prior permission.
  11  *
  12  * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
  13  * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
  14  * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
  15  * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
  16  * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
  17  * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
  18  * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
  19  * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
  20  * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
  21  * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
  22  * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
  23  * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
  24  *
  25  *
  26  * US Government Users Restricted Rights
  27  * Use, duplication, or disclosure by the Government is subject to
  28  * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
  29  * (c)(1)(ii) of the Rights in Technical Data and Computer Software
  30  * clause at DFARS 252.227-7013 and/or in similar or successor
  31  * clauses in the FAR or the DOD or NASA FAR Supplement.
  32  * Unpublished-- rights reserved under the copyright laws of the
  33  * United States.  Contractor/manufacturer is Silicon Graphics,
  34  * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
  35  *
  36  * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
  37  */
  38
  39 /*
  40  *
  41  * This file has been slightly modified from the original for use with Mesa
  42  *
  43  *     Jeroen van der Zijp
  44  *
  45  *     jvz@cyberia.cfdrc.com
  46  *
  47  */
  48 #include <X11/IntrinsicP.h>
  49 #include <X11/StringDefs.h>
  50 #include <GL/glx.h>
  51 #include <GL/gl.h>
  52 #ifdef __GLX_MOTIF
  53 #include <Xm/PrimitiveP.h>
  54 #include "GLwMDrawAP.h"
  55 #else
  56 #include "GLwDrawAP.h"
  57 #endif
  58 #include <assert.h>
  59 #include <stdio.h>
  60
  61 #ifdef __GLX_MOTIF
  62 #define GLwDrawingAreaWidget             GLwMDrawingAreaWidget
  63 #define GLwDrawingAreaClassRec           GLwMDrawingAreaClassRec
  64 #define glwDrawingAreaClassRec           glwMDrawingAreaClassRec
  65 #define glwDrawingAreaWidgetClass        glwMDrawingAreaWidgetClass
  66 #define GLwDrawingAreaRec                GLwMDrawingAreaRec
  67 #endif
  68
  69 #define ATTRIBLIST_SIZE 32
  70
  71 #define offset(field) XtOffset(GLwDrawingAreaWidget,glwDrawingArea.field)
  72
  73
  74 /* forward definitions */
  75 static void createColormap(GLwDrawingAreaWidget w,int offset,XrmValue *value);
  76 static void Initialize(GLwDrawingAreaWidget req,GLwDrawingAreaWidget neww,ArgList args,Cardinal *num_args);
  77 static void Realize(Widget w,Mask *valueMask,XSetWindowAttributes *attributes);
  78 static void Redraw(GLwDrawingAreaWidget w,XEvent *event,Region region);
  79 static void Resize(GLwDrawingAreaWidget glw);
  80 static void Destroy(GLwDrawingAreaWidget glw);
  81 static void glwInput(GLwDrawingAreaWidget glw,XEvent *event,String *params,Cardinal *numParams);
  82
  83
  84
  85 static char defaultTranslations[] =
  86 #ifdef __GLX_MOTIF
  87      "<Key>osfHelp:PrimitiveHelp() \n"
  88 #endif
  89     "<KeyDown>:   glwInput() \n\
  90      <KeyUp>:     glwInput() \n\
  91      <BtnDown>:   glwInput() \n\
  92      <BtnUp>:     glwInput() \n\
  93      <BtnMotion>: glwInput() ";
  94
  95
  96 static XtActionsRec actions[] = {
  97   {"glwInput",(XtActionProc)glwInput},                /* key or mouse input */
  98   };
  99
 100
 101 /*
 102  * There is a bit of unusual handling of the resources here.
 103  * Because Xt insists on allocating the colormap resource when it is
 104  * processing the core resources (even if we redeclare the colormap
 105  * resource here, we need to do a little trick.  When Xt first allocates
 106  * the colormap, we allow it to allocate the default one, since we have
 107  * not yet determined the appropriate visual (which is determined from
 108  * resources parsed after the colormap).  We also let it allocate colors
 109  * in that default colormap.
 110  *
 111  * In the initialize proc we calculate the actual visual.  Then, we
 112  * reobtain the colormap resource using XtGetApplicationResources in
 113  * the initialize proc.  If requested, we also reallocate colors in
 114  * that colormap using the same method.
 115  */
 116
 117 static XtResource resources[] = {
 118   /* The GLX attributes.  Add any new attributes here */
 119
 120   {GLwNbufferSize, GLwCBufferSize, XtRInt, sizeof (int),
 121        offset(bufferSize), XtRImmediate, (XtPointer) 0},
 122
 123   {GLwNlevel, GLwCLevel, XtRInt, sizeof (int),
 124        offset(level), XtRImmediate, (XtPointer) 0},
 125
 126   {GLwNrgba, GLwCRgba, XtRBoolean, sizeof (Boolean),
 127        offset(rgba), XtRImmediate, (XtPointer) FALSE},
 128
 129   {GLwNdoublebuffer, GLwCDoublebuffer, XtRBoolean, sizeof (Boolean),
 130        offset(doublebuffer), XtRImmediate, (XtPointer) FALSE},
 131
 132   {GLwNstereo, GLwCStereo, XtRBoolean, sizeof (Boolean),
 133        offset(stereo), XtRImmediate, (XtPointer) FALSE},
 134
 135   {GLwNauxBuffers, GLwCAuxBuffers, XtRInt, sizeof (int),
 136        offset(auxBuffers), XtRImmediate, (XtPointer) 0},
 137
 138   {GLwNredSize, GLwCColorSize, XtRInt, sizeof (int),
 139        offset(redSize), XtRImmediate, (XtPointer) 1},
 140
 141   {GLwNgreenSize, GLwCColorSize, XtRInt, sizeof (int),
 142        offset(greenSize), XtRImmediate, (XtPointer) 1},
 143
 144   {GLwNblueSize, GLwCColorSize, XtRInt, sizeof (int),
 145        offset(blueSize), XtRImmediate, (XtPointer) 1},
 146
 147   {GLwNalphaSize, GLwCAlphaSize, XtRInt, sizeof (int),
 148        offset(alphaSize), XtRImmediate, (XtPointer) 0},
 149
 150   {GLwNdepthSize, GLwCDepthSize, XtRInt, sizeof (int),
 151        offset(depthSize), XtRImmediate, (XtPointer) 0},
 152
 153   {GLwNstencilSize, GLwCStencilSize, XtRInt, sizeof (int),
 154        offset(stencilSize), XtRImmediate, (XtPointer) 0},
 155
 156   {GLwNaccumRedSize, GLwCAccumColorSize, XtRInt, sizeof (int),
 157        offset(accumRedSize), XtRImmediate, (XtPointer) 0},
 158
 159   {GLwNaccumGreenSize, GLwCAccumColorSize, XtRInt, sizeof (int),
 160        offset(accumGreenSize), XtRImmediate, (XtPointer) 0},
 161
 162   {GLwNaccumBlueSize, GLwCAccumColorSize, XtRInt, sizeof (int),
 163        offset(accumBlueSize), XtRImmediate, (XtPointer) 0},
 164
 165   {GLwNaccumAlphaSize, GLwCAccumAlphaSize, XtRInt, sizeof (int),
 166        offset(accumAlphaSize), XtRImmediate, (XtPointer) 0},
 167
 168   /* the attribute list */
 169   {GLwNattribList, GLwCAttribList, XtRPointer, sizeof(int *),
 170        offset(attribList), XtRImmediate, (XtPointer) NULL},
 171
 172   /* the visual info */
 173   {GLwNvisualInfo, GLwCVisualInfo, GLwRVisualInfo, sizeof (XVisualInfo *),
 174        offset(visualInfo), XtRImmediate, (XtPointer) NULL},
 175
 176   /* miscellaneous resources */
 177   {GLwNinstallColormap, GLwCInstallColormap, XtRBoolean, sizeof (Boolean),
 178        offset(installColormap), XtRImmediate, (XtPointer) TRUE},
 179
 180   {GLwNallocateBackground, GLwCAllocateColors, XtRBoolean, sizeof (Boolean),
 181        offset(allocateBackground), XtRImmediate, (XtPointer) FALSE},
 182
 183   {GLwNallocateOtherColors, GLwCAllocateColors, XtRBoolean, sizeof (Boolean),
 184        offset(allocateOtherColors), XtRImmediate, (XtPointer) FALSE},
 185
 186   {GLwNinstallBackground, GLwCInstallBackground, XtRBoolean, sizeof (Boolean),
 187        offset(installBackground), XtRImmediate, (XtPointer) TRUE},
 188
 189   {GLwNginitCallback, GLwCCallback, XtRCallback, sizeof (XtCallbackList),
 190        offset(ginitCallback), XtRImmediate, (XtPointer) NULL},
 191
 192   {GLwNinputCallback, GLwCCallback, XtRCallback, sizeof (XtCallbackList),
 193        offset(inputCallback), XtRImmediate, (XtPointer) NULL},
 194
 195   {GLwNresizeCallback, GLwCCallback, XtRCallback, sizeof (XtCallbackList),
 196        offset(resizeCallback), XtRImmediate, (XtPointer) NULL},
 197
 198   {GLwNexposeCallback, GLwCCallback, XtRCallback, sizeof (XtCallbackList),
 199        offset(exposeCallback), XtRImmediate, (XtPointer) NULL},
 200
 201   /* Changes to Motif primitive resources */
 202 #ifdef __GLX_MOTIF
 203   {XmNtraversalOn, XmCTraversalOn, XmRBoolean, sizeof (Boolean),
 204    XtOffset (GLwDrawingAreaWidget, primitive.traversal_on), XmRImmediate,
 205    (XtPointer)FALSE},
 206
 207   /* highlighting is normally disabled, as when Motif tries to disable
 208    * highlighting, it tries to reset the color back to the parent's
 209    * background (usually Motif blue).  Unfortunately, that is in a
 210    * different colormap, and doesn't work too well.
 211    */
 212   {XmNhighlightOnEnter, XmCHighlightOnEnter, XmRBoolean, sizeof (Boolean),
 213    XtOffset (GLwDrawingAreaWidget, primitive.highlight_on_enter),
 214    XmRImmediate, (XtPointer) FALSE},
 215
 216   {XmNhighlightThickness, XmCHighlightThickness, XmRHorizontalDimension,
 217    sizeof (Dimension),
 218    XtOffset (GLwDrawingAreaWidget, primitive.highlight_thickness),
 219    XmRImmediate, (XtPointer) 0},
 220 #endif
 221   };
 222
 223
 224 /*
 225 ** The following resources are reobtained using XtGetApplicationResources
 226 ** in the initialize proc.
 227 */
 228
 229 /* The colormap */
 230 static XtResource initializeResources[] = {
 231   /* reobtain the colormap with the new visual */
 232   {XtNcolormap, XtCColormap, XtRColormap, sizeof(Colormap),
 233    XtOffset(GLwDrawingAreaWidget, core.colormap),
 234    XtRCallProc,(XtPointer) createColormap},
 235   };
 236
 237
 238 /* reallocate any colors we need in the new colormap */
 239
 240 /* The background is obtained only if the allocateBackground resource is TRUE*/
 241 static XtResource backgroundResources[] = {
 242 #ifdef __GLX_MOTIF
 243   {XmNbackground, XmCBackground,XmRPixel,
 244    sizeof(Pixel),XtOffset(GLwDrawingAreaWidget,core.background_pixel),
 245    XmRString,(XtPointer)"lightgrey"},
 246    /*XmRCallProc,(XtPointer)_XmBackgroundColorDefault},*/
 247
 248   {XmNbackgroundPixmap,XmCPixmap,XmRXmBackgroundPixmap,
 249    sizeof(Pixmap),XtOffset(GLwDrawingAreaWidget,core.background_pixmap),
 250    XmRImmediate,(XtPointer)XmUNSPECIFIED_PIXMAP},
 251
 252 #else
 253   {XtNbackground,XtCBackground,XtRPixel,sizeof(Pixel),
 254    XtOffset(GLwDrawingAreaWidget,core.background_pixel),
 255    XtRString,(XtPointer)"lightgrey"},
 256    /*XtRString,(XtPointer)"XtDefaultBackground"},*/
 257
 258   {XtNbackgroundPixmap, XtCPixmap, XtRPixmap, sizeof(Pixmap),
 259    XtOffset(GLwDrawingAreaWidget,core.background_pixmap),
 260    XtRImmediate,(XtPointer)XtUnspecifiedPixmap},
 261 #endif
 262   };
 263
 264
 265
 266 /* The other colors such as the foreground are allocated only if
 267  * allocateOtherColors are set.  These resources only exist in Motif.
 268  */
 269 #ifdef __GLX_MOTIF
 270 static XtResource otherColorResources[] = {
 271   {XmNforeground,XmCForeground,XmRPixel,
 272    sizeof(Pixel),XtOffset(GLwDrawingAreaWidget,primitive.foreground),
 273    XmRString,(XtPointer)"lighgrey"},
 274    /*XmRCallProc, (XtPointer) _XmForegroundColorDefault},*/
 275
 276   {XmNhighlightColor,XmCHighlightColor,XmRPixel,sizeof(Pixel),
 277    XtOffset(GLwDrawingAreaWidget,primitive.highlight_color),
 278    XmRString,(XtPointer)"lightgrey"},
 279    /*XmRCallProc,(XtPointer)_XmHighlightColorDefault},*/
 280
 281   {XmNhighlightPixmap,XmCHighlightPixmap,XmRPrimHighlightPixmap,
 282    sizeof(Pixmap),
 283    XtOffset(GLwDrawingAreaWidget,primitive.highlight_pixmap),
 284    XmRImmediate,(XtPointer)XmUNSPECIFIED_PIXMAP},
 285    /*XmRCallProc,(XtPointer)_XmPrimitiveHighlightPixmapDefault},*/
 286   };
 287 #endif
 288
 289
 290 #undef offset
 291
 292
 293 GLwDrawingAreaClassRec glwDrawingAreaClassRec = {
 294   { /* core fields */
 295 #ifdef __GLX_MOTIF
 296     /* superclass                */        (WidgetClass) &xmPrimitiveClassRec,
 297     /* class_name                */        "GLwMDrawingArea",
 298 #else /* not __GLX_MOTIF */
 299     /* superclass                */        (WidgetClass) &widgetClassRec,
 300     /* class_name                */        "GLwDrawingArea",
 301 #endif /* __GLX_MOTIF */
 302     /* widget_size               */        sizeof(GLwDrawingAreaRec),
 303     /* class_initialize          */        NULL,
 304     /* class_part_initialize     */        NULL,
 305     /* class_inited              */        FALSE,
 306     /* initialize                */        (XtInitProc) Initialize,
 307     /* initialize_hook           */        NULL,
 308     /* realize                   */        Realize,
 309     /* actions                   */        actions,
 310     /* num_actions               */        XtNumber(actions),
 311     /* resources                 */        resources,
 312     /* num_resources             */        XtNumber(resources),
 313     /* xrm_class                 */        NULLQUARK,
 314     /* compress_motion           */        TRUE,
 315     /* compress_exposure         */        TRUE,
 316     /* compress_enterleave       */        TRUE,
 317     /* visible_interest          */        TRUE,
 318     /* destroy                   */        (XtWidgetProc) Destroy,
 319     /* resize                    */        (XtWidgetProc) Resize,
 320     /* expose                    */        (XtExposeProc) Redraw,
 321     /* set_values                */        NULL,
 322     /* set_values_hook           */        NULL,
 323     /* set_values_almost         */        XtInheritSetValuesAlmost,
 324     /* get_values_hook           */        NULL,
 325     /* accept_focus              */        NULL,
 326     /* version                   */        XtVersion,
 327     /* callback_private          */        NULL,
 328     /* tm_table                  */        defaultTranslations,
 329     /* query_geometry            */        XtInheritQueryGeometry,
 330     /* display_accelerator       */        XtInheritDisplayAccelerator,
 331     /* extension                 */        NULL
 332   },
 333 #ifdef __GLX_MOTIF /* primitive resources */
 334   {
 335     /* border_highlight          */        XmInheritBorderHighlight,
 336     /* border_unhighlight        */        XmInheritBorderUnhighlight,
 337     /* translations              */        XtInheritTranslations,
 338     /* arm_and_activate          */        NULL,
 339     /* get_resources             */        NULL,
 340     /* num get_resources         */        0,
 341     /* extension                 */        NULL,
 342   }
 343 #endif
 344   };
 345
 346 WidgetClass glwDrawingAreaWidgetClass=(WidgetClass)&glwDrawingAreaClassRec;
 347
 348
 349
 350 static void error(Widget w,char* string){
 351   char buf[100];
 352 #ifdef __GLX_MOTIF
 353   sprintf(buf,"GLwMDrawingArea: %s\n",string);
 354 #else
 355   sprintf(buf,"GLwDrawingArea: %s\n",string);
 356 #endif
 357   XtAppError(XtWidgetToApplicationContext(w),buf);
 358   }
 359
 360
 361 static void warning(Widget w,char* string){
 362   char buf[100];
 363 #ifdef __GLX_MOTIF
 364   sprintf (buf, "GLwMDraw: %s\n", string);
 365 #else
 366   sprintf (buf, "GLwDraw: %s\n", string);
 367 #endif
 368   XtAppWarning(XtWidgetToApplicationContext(w), buf);
 369   }
 370
 371
 372
 373 /* Initialize the attribList based on the attributes */
 374 static void createAttribList(GLwDrawingAreaWidget w){
 375   int *ptr;
 376   w->glwDrawingArea.attribList = (int*)XtMalloc(ATTRIBLIST_SIZE*sizeof(int));
 377   if(!w->glwDrawingArea.attribList){
 378     error((Widget)w,"Unable to allocate attribute list");
 379     }
 380   ptr = w->glwDrawingArea.attribList;
 381   *ptr++ = GLX_BUFFER_SIZE;
 382   *ptr++ = w->glwDrawingArea.bufferSize;
 383   *ptr++ = GLX_LEVEL;
 384   *ptr++ = w->glwDrawingArea.level;
 385   if(w->glwDrawingArea.rgba) *ptr++ = GLX_RGBA;
 386   if(w->glwDrawingArea.doublebuffer) *ptr++ = GLX_DOUBLEBUFFER;
 387   if(w->glwDrawingArea.stereo) *ptr++ = GLX_STEREO;
 388   *ptr++ = GLX_AUX_BUFFERS;
 389   *ptr++ = w->glwDrawingArea.auxBuffers;
 390   *ptr++ = GLX_RED_SIZE;
 391   *ptr++ = w->glwDrawingArea.redSize;
 392   *ptr++ = GLX_GREEN_SIZE;
 393   *ptr++ = w->glwDrawingArea.greenSize;
 394   *ptr++ = GLX_BLUE_SIZE;
 395   *ptr++ = w->glwDrawingArea.blueSize;
 396   *ptr++ = GLX_ALPHA_SIZE;
 397   *ptr++ = w->glwDrawingArea.alphaSize;
 398   *ptr++ = GLX_DEPTH_SIZE;
 399   *ptr++ = w->glwDrawingArea.depthSize;
 400   *ptr++ = GLX_STENCIL_SIZE;
 401   *ptr++ = w->glwDrawingArea.stencilSize;
 402   *ptr++ = GLX_ACCUM_RED_SIZE;
 403   *ptr++ = w->glwDrawingArea.accumRedSize;
 404   *ptr++ = GLX_ACCUM_GREEN_SIZE;
 405   *ptr++ = w->glwDrawingArea.accumGreenSize;
 406   *ptr++ = GLX_ACCUM_BLUE_SIZE;
 407   *ptr++ = w->glwDrawingArea.accumBlueSize;
 408   *ptr++ = GLX_ACCUM_ALPHA_SIZE;
 409   *ptr++ = w->glwDrawingArea.accumAlphaSize;
 410   *ptr++ = None;
 411   assert((ptr-w->glwDrawingArea.attribList)<ATTRIBLIST_SIZE);
 412   }
 413
 414
 415
 416 /* Initialize the visualInfo based on the attribute list */
 417 static void createVisualInfo(GLwDrawingAreaWidget w){
 418   assert(w->glwDrawingArea.attribList);
 419   w->glwDrawingArea.visualInfo=glXChooseVisual(XtDisplay(w),XScreenNumberOfScreen(XtScreen(w)),w->glwDrawingArea.attribList);
 420   if(!w->glwDrawingArea.visualInfo) error((Widget)w,"requested visual not supported");
 421   }
 422
 423
 424
 425 /* Initialize the colormap based on the visual info.
 426  * This routine maintains a cache of visual-infos to colormaps.  If two
 427  * widgets share the same visual info, they share the same colormap.
 428  * This function is called by the callProc of the colormap resource entry.
 429  */
 430 static void createColormap(GLwDrawingAreaWidget w,int offset,XrmValue *value){
 431   static struct cmapCache { Visual *visual; Colormap cmap; } *cmapCache;
 432   static int cacheEntries=0;
 433   static int cacheMalloced=0;
 434   register int i;
 435
 436   assert(w->glwDrawingArea.visualInfo);
 437
 438   /* see if we can find it in the cache */
 439   for(i=0; i<cacheEntries; i++){
 440     if(cmapCache[i].visual==w->glwDrawingArea.visualInfo->visual){
 441       value->addr=(XtPointer)(&cmapCache[i].cmap);
 442       return;
 443       }
 444     }
 445
 446   /* not in the cache, create a new entry */
 447   if(cacheEntries >= cacheMalloced){
 448     /* need to malloc a new one.  Since we are likely to have only a
 449      * few colormaps, we allocate one the first time, and double
 450      * each subsequent time.
 451      */
 452     if(cacheMalloced==0){
 453       cacheMalloced=1;
 454       cmapCache=(struct cmapCache*)XtMalloc(sizeof(struct cmapCache));
 455       }
 456     else{
 457       cacheMalloced<<=1;
 458       cmapCache=(struct cmapCache*)XtRealloc((char*)cmapCache,sizeof(struct cmapCache)*cacheMalloced);
 459       }
 460     }
 461
 462   cmapCache[cacheEntries].cmap=XCreateColormap(XtDisplay(w),
 463                                                RootWindow(XtDisplay(w),
 464                                                w->glwDrawingArea.visualInfo->screen),
 465                                                w->glwDrawingArea.visualInfo->visual,
 466                                                AllocNone);
 467   cmapCache[cacheEntries].visual=w->glwDrawingArea.visualInfo->visual;
 468   value->addr=(XtPointer)(&cmapCache[cacheEntries++].cmap);
 469   }
 470
 471
 472
 473 static void Initialize(GLwDrawingAreaWidget req,GLwDrawingAreaWidget neww,ArgList args,Cardinal *num_args){
 474
 475   /* fix size */
 476   if(req->core.width==0) neww->core.width=100;
 477   if(req->core.height==0) neww->core.width=100;
 478
 479   /* create the attribute list if needed */
 480   neww->glwDrawingArea.myList=FALSE;
 481   if(neww->glwDrawingArea.attribList==NULL){
 482     neww->glwDrawingArea.myList=TRUE;
 483     createAttribList(neww);
 484     }
 485
 486   /* Gotta have it */
 487   assert(neww->glwDrawingArea.attribList);
 488
 489   /* determine the visual info if needed */
 490   neww->glwDrawingArea.myVisual=FALSE;
 491   if(neww->glwDrawingArea.visualInfo==NULL){
 492     neww->glwDrawingArea.myVisual=TRUE;
 493     createVisualInfo(neww);
 494     }
 495
 496   /* Gotta have that too */
 497   assert(neww->glwDrawingArea.visualInfo);
 498
 499   neww->core.depth=neww->glwDrawingArea.visualInfo->depth;
 500
 501   /* Reobtain the colormap and colors in it using XtGetApplicationResources*/
 502   XtGetApplicationResources((Widget)neww,neww,initializeResources,XtNumber(initializeResources),args,*num_args);
 503
 504   /* obtain the color resources if appropriate */
 505   if(req->glwDrawingArea.allocateBackground){
 506     XtGetApplicationResources((Widget)neww,neww,backgroundResources,XtNumber(backgroundResources),args,*num_args);
 507     }
 508
 509 #ifdef __GLX_MOTIF
 510   if(req->glwDrawingArea.allocateOtherColors){
 511     XtGetApplicationResources((Widget)neww,neww,otherColorResources,XtNumber(otherColorResources),args,*num_args);
 512     }
 513 #endif
 514   }
 515
 516
 517
 518 static void Realize(Widget w,Mask *valueMask,XSetWindowAttributes *attributes){
 519   register GLwDrawingAreaWidget glw=(GLwDrawingAreaWidget)w;
 520   GLwDrawingAreaCallbackStruct cb;
 521   Widget parentShell;
 522   Status status;
 523   Window windows[2],*windowsReturn,*windowList;
 524   int countReturn,i;
 525
 526   /* if we haven't requested that the background be both installed and
 527    * allocated, don't install it.
 528    */
 529   if(!(glw->glwDrawingArea.installBackground && glw->glwDrawingArea.allocateBackground)){
 530     *valueMask&=~CWBackPixel;
 531     }
 532
 533   XtCreateWindow(w,(unsigned int)InputOutput,glw->glwDrawingArea.visualInfo->visual,*valueMask,attributes);
 534
 535   /* if appropriate, call XSetWMColormapWindows to install the colormap */
 536   if(glw->glwDrawingArea.installColormap){
 537
 538     /* Get parent shell */
 539     for(parentShell=XtParent(w); parentShell&&!XtIsShell(parentShell); parentShell=XtParent(parentShell));
 540
 541     if(parentShell && XtWindow(parentShell)){
 542
 543       /* check to see if there is already a property */
 544       status=XGetWMColormapWindows(XtDisplay(parentShell),XtWindow(parentShell),&windowsReturn,&countReturn);
 545
 546       /* if no property, just create one */
 547       if(!status){
 548         windows[0]=XtWindow(w);
 549         windows[1]=XtWindow(parentShell);
 550         XSetWMColormapWindows(XtDisplay(parentShell),XtWindow(parentShell),windows,2);
 551         }
 552
 553       /* there was a property, add myself to the beginning */
 554       else{
 555         windowList=(Window *)XtMalloc((sizeof(Window))*(countReturn+1));
 556         windowList[0]=XtWindow(w);
 557         for(i=0; i<countReturn; i++) windowList[i+1]=windowsReturn[i];
 558         XSetWMColormapWindows(XtDisplay(parentShell),XtWindow(parentShell),windowList,countReturn+1);
 559         XtFree((char*)windowList);
 560         XtFree((char*)windowsReturn);
 561         }
 562       }
 563     else{
 564       warning(w,"Could not set colormap property on parent shell");
 565       }
 566     }
 567
 568   /* Invoke callbacks */
 569   cb.reason=GLwCR_GINIT;
 570   cb.event=NULL;
 571   cb.width=glw->core.width;
 572   cb.height=glw->core.height;
 573   XtCallCallbackList((Widget)glw,glw->glwDrawingArea.ginitCallback,&cb);
 574   }
 575
 576
 577
 578 static void Redraw(GLwDrawingAreaWidget w,XEvent *event,Region region){
 579   GLwDrawingAreaCallbackStruct cb;
 580   if(!XtIsRealized((Widget)w)) return;
 581   cb.reason=GLwCR_EXPOSE;
 582   cb.event=event;
 583   cb.width=w->core.width;
 584   cb.height=w->core.height;
 585   XtCallCallbackList((Widget)w,w->glwDrawingArea.exposeCallback,&cb);
 586   }
 587
 588
 589
 590 static void Resize(GLwDrawingAreaWidget glw){
 591   GLwDrawingAreaCallbackStruct cb;
 592   if(!XtIsRealized((Widget)glw)) return;
 593   cb.reason=GLwCR_RESIZE;
 594   cb.event=NULL;
 595   cb.width=glw->core.width;
 596   cb.height=glw->core.height;
 597   XtCallCallbackList((Widget)glw,glw->glwDrawingArea.resizeCallback,&cb);
 598   }
 599
 600
 601
 602 static void Destroy(GLwDrawingAreaWidget glw){
 603   Window *windowsReturn;
 604   Widget parentShell;
 605   Status status;
 606   int countReturn;
 607   register int i;
 608
 609   if(glw->glwDrawingArea.myList && glw->glwDrawingArea.attribList){
 610     XtFree((XtPointer)glw->glwDrawingArea.attribList);
 611     }
 612
 613   if(glw->glwDrawingArea.myVisual && glw->glwDrawingArea.visualInfo){
 614     XtFree((XtPointer)glw->glwDrawingArea.visualInfo);
 615     }
 616
 617   /* if my colormap was installed, remove it */
 618   if(glw->glwDrawingArea.installColormap){
 619
 620     /* Get parent shell */
 621     for(parentShell=XtParent(glw); parentShell&&!XtIsShell(parentShell); parentShell=XtParent(parentShell));
 622
 623     if(parentShell && XtWindow(parentShell)){
 624
 625       /* make sure there is a property */
 626       status=XGetWMColormapWindows(XtDisplay(parentShell),XtWindow(parentShell),&windowsReturn,&countReturn);
 627
 628       /* if no property, just return.  If there was a property, continue */
 629       if(status){
 630
 631         /* search for a match */
 632         for(i=0; i<countReturn; i++){
 633           if(windowsReturn[i]==XtWindow(glw)){
 634
 635             /* we found a match, now copy the rest down */
 636             for(i++; i<countReturn; i++){ windowsReturn[i-1]=windowsReturn[i]; }
 637
 638             XSetWMColormapWindows(XtDisplay(parentShell),XtWindow(parentShell),windowsReturn,countReturn-1);
 639             break;
 640             }
 641           }
 642         XtFree((char *)windowsReturn);
 643         }
 644       }
 645     }
 646   }
 647
 648
 649
 650 /* Action routine for keyboard and mouse events */
 651 static void glwInput(GLwDrawingAreaWidget glw,XEvent *event,String *params,Cardinal *numParams){
 652   GLwDrawingAreaCallbackStruct cb;
 653   cb.reason=GLwCR_INPUT;
 654   cb.event=event;
 655   cb.width=glw->core.width;
 656   cb.height=glw->core.height;
 657   XtCallCallbackList((Widget)glw,glw->glwDrawingArea.inputCallback,&cb);
 658   }
 659
 660
 661 #ifdef __GLX_MOTIF
 662
 663 /* Create routine */
 664 Widget GLwCreateMDrawingArea(Widget parent, char *name,ArgList arglist,Cardinal argcount){
 665   return XtCreateWidget(name,glwMDrawingAreaWidgetClass, parent, arglist,argcount);
 666   }
 667
 668 #endif
 669
 670
 671 #ifndef __GLX_MOTIF
 672
 673 /* Make context current */
 674 void GLwDrawingAreaMakeCurrent(Widget w,GLXContext ctx){
 675   glXMakeCurrent(XtDisplay(w),XtWindow(w),ctx);
 676   }
 677
 678
 679 /* Swap buffers convenience function */
 680 void GLwDrawingAreaSwapBuffers(Widget w){
 681   glXSwapBuffers(XtDisplay(w),XtWindow(w));
 682   }
 683
 684 #endif