/*
 * (c) Copyright 1993, Silicon Graphics, Inc.
 * ALL RIGHTS RESERVED
 * Permission to use, copy, modify, and distribute this software for
 * any purpose and without fee is hereby granted, provided that the above
 * copyright notice appear in all copies and that both the copyright notice
 * and this permission notice appear in supporting documentation, and that
 * the name of Silicon Graphics, Inc. not be used in advertising
 * or publicity pertaining to distribution of the software without specific,
 * written prior permission.
 *
 * THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS"
 * AND WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR
 * FITNESS FOR A PARTICULAR PURPOSE.  IN NO EVENT SHALL SILICON
 * GRAPHICS, INC.  BE LIABLE TO YOU OR ANYONE ELSE FOR ANY DIRECT,
 * SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY
 * KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING WITHOUT LIMITATION,
 * LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, OR THE CLAIMS OF
 * THIRD PARTIES, WHETHER OR NOT SILICON GRAPHICS, INC.  HAS BEEN
 * ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE
 * POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 *
 * US Government Users Restricted Rights
 * Use, duplication, or disclosure by the Government is subject to
 * restrictions set forth in FAR 52.227.19(c)(2) or subparagraph
 * (c)(1)(ii) of the Rights in Technical Data and Computer Software
 * clause at DFARS 252.227-7013 and/or in similar or successor
 * clauses in the FAR or the DOD or NASA FAR Supplement.
 * Unpublished-- rights reserved under the copyright laws of the
 * United States.  Contractor/manufacturer is Silicon Graphics,
 * Inc., 2011 N.  Shoreline Blvd., Mountain View, CA 94039-7311.
 *
 * OpenGL(TM) is a trademark of Silicon Graphics, Inc.
 */
#ifndef _GLwDrawA_h
#define _GLwDrawA_h

// #include <GL/glxew.h>
#include <GL/glx.h>
#include <GL/gl.h>

// -------------------------------
//      GLwDrawingArea widgets

/* Resources:

Name                Class              RepType         Default Value
----                -----              -------         -------------
attribList          AttribList         int *           NULL
visualInfo          VisualInfo         VisualInfo      NULL
installColormap     InstallColormap    Boolean         TRUE
allocateBackground  AllocateColors     Boolean         FALSE
allocateOtherColors AllocateColors     Boolean         FALSE
installBackground   InstallBackground  Boolean         TRUE
exposeCallback      Callback           Pointer         NULL
ginitCallback       Callback           Pointer         NULL
inputCallback       Callback           Pointer         NULL
resizeCallback      Callback           Pointer         NULL

*** The following resources all correspond to the GLX configuration
*** attributes and are used to create the attribList if it is NULL
bufferSize          BufferSize         int             0
level               Level              int             0
rgba                Rgba               Boolean         FALSE
doublebuffer        Doublebuffer       Boolean         FALSE
stereo              Stereo             Boolean         FALSE
auxBuffers          AuxBuffers         int             0
redSize             ColorSize          int             1
greenSize           ColorSize          int             1
blueSize            ColorSize          int             1
alphaSize           AlphaSize          int             0
depthSize           DepthSize          int             0
stencilSize         StencilSize        int             0
accumRedSize        AccumColorSize     int             0
accumGreenSize      AccumColorSize     int             0
accumBlueSize       AccumColorSize     int             0
accumAlphaSize      AccumAlphaSize     int             0
*/

#define GLwNattribList          "attribList"
#define GLwCAttribList          "AttribList"
#define GLwNvisualInfo          "visualInfo"
#define GLwCVisualInfo          "VisualInfo"
#define GLwRVisualInfo          "VisualInfo"

#define GLwNinstallColormap     "installColormap"
#define GLwCInstallColormap     "InstallColormap"
#define GLwNallocateBackground  "allocateBackground"
#define GLwNallocateOtherColors "allocateOtherColors"
#define GLwCAllocateColors      "AllocateColors"
#define GLwNinstallBackground   "installBackground"
#define GLwCInstallBackground   "InstallBackground"

#define GLwCCallback            "Callback"
#define GLwNexposeCallback      "exposeCallback"
#define GLwNginitCallback       "ginitCallback"
#define GLwNresizeCallback      "resizeCallback"
#define GLwNinputCallback       "inputCallback"

#define GLwNbufferSize          "bufferSize"
#define GLwCBufferSize          "BufferSize"
#define GLwNlevel               "level"
#define GLwCLevel               "Level"
#define GLwNrgba                "rgba"
#define GLwCRgba                "Rgba"
#define GLwNdoublebuffer        "doublebuffer"
#define GLwCDoublebuffer        "Doublebuffer"
#define GLwNstereo              "stereo"
#define GLwCStereo              "Stereo"
#define GLwNauxBuffers          "auxBuffers"
#define GLwCAuxBuffers          "AuxBuffers"
#define GLwNredSize             "redSize"
#define GLwNgreenSize           "greenSize"
#define GLwNblueSize            "blueSize"
#define GLwCColorSize           "ColorSize"
#define GLwNalphaSize           "alphaSize"
#define GLwCAlphaSize           "AlphaSize"
#define GLwNdepthSize           "depthSize"
#define GLwCDepthSize           "DepthSize"
#define GLwNstencilSize         "stencilSize"
#define GLwCStencilSize         "StencilSize"
#define GLwNaccumRedSize        "accumRedSize"
#define GLwNaccumGreenSize      "accumGreenSize"
#define GLwNaccumBlueSize       "accumBlueSize"
#define GLwCAccumColorSize      "AccumColorSize"
#define GLwNaccumAlphaSize      "accumAlphaSize"
#define GLwCAccumAlphaSize      "AccumAlphaSize"

#ifdef __GLX_MOTIF

typedef struct _GLwMDrawingAreaClassRec *GLwMDrawingAreaWidgetClass;
typedef struct _GLwMDrawingAreaRec      *GLwMDrawingAreaWidget;

// BUG. Extended by Daniel Koitzsch and Christian Becker
// #define glwMDrawingAreaWidgetClass glwM1DrawingAreaWidgetClass
// defining glwMDrawingAreaWidgetClass twice doesn't work
#define glwMDrawingAreaWidgetClass glwM2DrawingAreaWidgetClass

extern WidgetClass glwMDrawingAreaWidgetClass;

#else

typedef struct _GLwDrawingAreaClassRec  *GLwDrawingAreaWidgetClass;
typedef struct _GLwDrawingAreaRec       *GLwDrawingAreaWidget;

extern WidgetClass glwDrawingAreaWidgetClass;


#endif


// Callback reasons
#ifdef __GLX_MOTIF
#define GLwCR_EXPOSE    XmCR_EXPOSE
#define GLwCR_RESIZE    XmCR_RESIZE
#define GLwCR_INPUT     XmCR_INPUT
#else
// The same values as Motif, but don't use Motif constants
#define GLwCR_EXPOSE    38
#define GLwCR_RESIZE    39
#define GLwCR_INPUT     40
#endif

#define GLwCR_GINIT     32135   // Arbitrary number that should neverr clash

typedef struct
{
    int       reason;
    XEvent   *event;
    Dimension width, height;
} GLwDrawingAreaCallbackStruct;

#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif

    // front ends to glXMakeCurrent and glXSwapBuffers
    extern void GLwDrawingAreaMakeCurrent(Widget w, GLXContext ctx);
    extern void GLwDrawingAreaSwapBuffers(Widget w);

#ifdef __GLX_MOTIF
#ifdef _NO_PROTO
    extern Widget GLwCreateMDrawingArea();
#else
    extern Widget GLwCreateMDrawingArea(Widget parent, char *name, ArgList arglist, Cardinal argcount);
#endif
#endif

#if defined(__cplusplus) || defined(c_plusplus)
}
#endif

#endif
