Moved glcore.h to a location prefixed by 'GL/internal', for compatibility

with XFree86 and the SI code there.

2 files changed, 821 insertions, 0 deletions

diff --git a/include/GL/internal/glcore-new.h b/include/GL/internal/glcore-new.h
new file mode 100644
index 00000000000..cd65286bc7a
--- /dev/null
+++ b/include/GL/internal/glcore-new.h
@@ -0,0 +1,424 @@
+#ifndef __gl_core_h_
+#define __gl_core_h_
+
+/*
+** License Applicability. Except to the extent portions of this file are
+** made subject to an alternative license as permitted in the SGI Free
+** Software License B, Version 1.1 (the "License"), the contents of this
+** file are subject only to the provisions of the License. You may not use
+** this file except in compliance with the License. You may obtain a copy
+** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
+** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
+** 
+** http://oss.sgi.com/projects/FreeB
+** 
+** Note that, as provided in the License, the Software is distributed on an
+** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
+** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
+** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
+** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
+** 
+** Original Code. The Original Code is: OpenGL Sample Implementation,
+** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
+** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
+** Copyright in any portions created by third parties is as indicated
+** elsewhere herein. All Rights Reserved.
+** 
+** Additional Notice Provisions: The application programming interfaces
+** established by SGI in conjunction with the Original Code are The
+** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
+** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
+** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
+** Window System(R) (Version 1.3), released October 19, 1998. This software
+** was created using the OpenGL(R) version 1.2.1 Sample Implementation
+** published by SGI, but has not been independently verified as being
+** compliant with the OpenGL(R) version 1.2.1 Specification.
+**
+** $Date: 2001/01/08 03:56:53 $ $Revision: 1.1 $
+** $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/include/GL/internal/Attic/glcore-new.h,v 1.1 2001/01/08 03:56:53 keithw Exp $
+*/
+
+#ifdef XFree86LOADER
+#include "xf86_ansic.h"
+#else
+#include <sys/types.h>
+#endif
+
+typedef struct __GLcontextRec __GLcontext;
+typedef struct __GLinterfaceRec __GLinterface;
+
+/*
+** This file defines the interface between the GL core and the surrounding
+** "operating system" that supports it (currently the GLX or WGL extensions).
+**
+** Members (data and function pointers) are documented as imported or
+** exported according to how they are used by the core rendering functions.
+** Imported members are initialized by the "operating system" and used by
+** the core functions.  Exported members are initialized by the core functions
+** and used by the "operating system".
+*/
+
+/*
+** Mode and limit information for a context.  This information is
+** kept around in the context so that values can be used during
+** command execution, and for returning information about the
+** context to the application.
+*/
+typedef struct __GLcontextModesRec {
+    GLboolean rgbMode;
+    GLboolean colorIndexMode;
+    GLboolean doubleBufferMode;
+    GLboolean stereoMode;
+
+    GLboolean haveAccumBuffer;
+    GLboolean haveDepthBuffer;
+    GLboolean haveStencilBuffer;
+
+    GLint redBits, greenBits, blueBits, alphaBits;	/* bits per comp */
+    GLuint redMask, greenMask, blueMask, alphaMask;
+    GLint rgbBits;		/* total bits for rgb */
+    GLint indexBits;		/* total bits for colorindex */
+
+    GLint accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits;
+    GLint depthBits;
+    GLint stencilBits;
+
+    GLint numAuxBuffers;
+
+    GLint level;
+
+    GLint pixmapMode;
+} __GLcontextModes;
+
+/************************************************************************/
+
+/*
+** Structure used for allocating and freeing drawable private memory.
+** (like software buffers, for example).
+**
+** The memory allocation routines are provided by the surrounding
+** "operating system" code, and they are to be used for allocating
+** software buffers and things which are associated with the drawable,
+** and used by any context which draws to that drawable.  There are
+** separate memory allocation functions for drawables and contexts
+** since drawables and contexts can be created and destroyed independently
+** of one another, and the "operating system" may want to use separate
+** allocation arenas for each.
+**
+** The freePrivate function is filled in by the core routines when they
+** allocates software buffers, and stick them in "private".  The freePrivate
+** function will destroy anything allocated to this drawable (to be called
+** when the drawable is destroyed).
+*/
+typedef struct __GLdrawableRegionRec __GLdrawableRegion;
+typedef struct __GLdrawableBufferRec __GLdrawableBuffer;
+typedef struct __GLdrawablePrivateRec __GLdrawablePrivate;
+
+typedef struct __GLregionRectRec {
+    /* lower left (inside the rectangle) */
+    GLint x0, y0;
+    /* upper right (outside the rectangle) */
+    GLint x1, y1;
+} __GLregionRect;
+
+struct __GLdrawableRegionRec {
+    GLint numRects;
+    __GLregionRect *rects;
+    __GLregionRect boundingRect;
+};
+
+/************************************************************************/
+
+/* masks for the buffers */
+#define __GL_FRONT_BUFFER_MASK		0x00000001
+#define	__GL_FRONT_LEFT_BUFFER_MASK	0x00000001
+#define	__GL_FRONT_RIGHT_BUFFER_MASK	0x00000002
+#define	__GL_BACK_BUFFER_MASK		0x00000004
+#define __GL_BACK_LEFT_BUFFER_MASK	0x00000004
+#define __GL_BACK_RIGHT_BUFFER_MASK	0x00000008
+#define	__GL_ACCUM_BUFFER_MASK		0x00000010
+#define	__GL_DEPTH_BUFFER_MASK		0x00000020
+#define	__GL_STENCIL_BUFFER_MASK	0x00000040
+#define	__GL_AUX_BUFFER_MASK(i)		(0x0000080 << (i))
+
+#define __GL_ALL_BUFFER_MASK		0xffffffff
+
+/* what Resize routines return if resize resorted to fallback case */
+#define __GL_BUFFER_FALLBACK	0x10
+
+typedef void (*__GLbufFallbackInitFn)(__GLdrawableBuffer *buf, 
+				      __GLdrawablePrivate *glPriv, GLint bits);
+typedef void (*__GLbufMainInitFn)(__GLdrawableBuffer *buf, 
+				  __GLdrawablePrivate *glPriv, GLint bits,
+				  __GLbufFallbackInitFn back);
+
+/*
+** A drawable buffer
+**
+** This data structure describes the context side of a drawable.  
+**
+** According to the spec there could be multiple contexts bound to the same
+** drawable at the same time (from different threads).  In order to avoid
+** multiple-access conflicts, locks are used to serialize access.  When a
+** thread needs to access (read or write) a member of the drawable, it takes
+** a lock first.  Some of the entries in the drawable are treated "mostly
+** constant", so we take the freedom of allowing access to them without
+** taking a lock (for optimization reasons).
+**
+** For more details regarding locking, see buffers.h in the GL core
+*/
+struct __GLdrawableBufferRec {
+    /*
+    ** Buffer dimensions
+    */
+    GLint width, height, depth;
+
+    /*
+    ** Framebuffer base address
+    */
+    void *base;
+
+    /*
+    ** Framebuffer size (in bytes)
+    */
+    GLuint size;
+
+    /*
+    ** Size (in bytes) of each element in the framebuffer
+    */
+    GLuint elementSize;
+    GLuint elementSizeLog2;
+
+    /*
+    ** Element skip from one scanline to the next.
+    ** If the buffer is part of another buffer (for example, fullscreen
+    ** front buffer), outerWidth is the width of that buffer.
+    */
+    GLint outerWidth;
+
+    /*
+    ** outerWidth * elementSize
+    */
+    GLint byteWidth;
+
+    /*
+    ** Allocation/deallocation is done based on this handle.  A handle
+    ** is conceptually different from the framebuffer 'base'.
+    */
+    void *handle;
+
+    /* imported */
+    GLboolean (*resize)(__GLdrawableBuffer *buf,
+			GLint x, GLint y, GLuint width, GLuint height, 
+			__GLdrawablePrivate *glPriv, GLuint bufferMask);
+    void (*lock)(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv);
+    void (*unlock)(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv);
+    void (*fill)(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv,
+    		GLuint val, GLint x, GLint y, GLint w, GLint h);
+    void (*free)(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv);
+
+    /* exported */
+    void (*freePrivate)(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv);
+#ifdef __cplusplus
+    void *privatePtr;
+#else
+    void *private;
+#endif
+
+    /* private */
+    void *other;	/* implementation private data */
+    __GLbufMainInitFn mainInit;
+    __GLbufFallbackInitFn fallbackInit;
+};
+
+/*
+** The context side of the drawable private
+*/
+struct __GLdrawablePrivateRec {
+    /*
+    ** Drawable Modes
+    */
+    __GLcontextModes *modes;
+
+    /*
+    ** Drawable size
+    */
+    GLuint width, height;
+
+    /*
+    ** Origin in screen coordinates of the drawable
+    */
+    GLint xOrigin, yOrigin;
+#ifdef __GL_ALIGNED_BUFFERS
+    /*
+    ** Drawable offset from screen origin
+    */
+    GLint xOffset, yOffset;
+
+    /*
+    ** Alignment restriction
+    */
+    GLint xAlignment, yAlignment;
+#endif
+    /*
+    ** Should we invert the y axis?
+    */
+    GLint yInverted;
+
+    /*
+    ** Mask specifying which buffers are renderable by the hw
+    */
+    GLuint accelBufferMask;
+
+    /*
+    ** the buffers themselves
+    */
+    __GLdrawableBuffer frontBuffer;
+    __GLdrawableBuffer backBuffer;
+    __GLdrawableBuffer accumBuffer;
+    __GLdrawableBuffer depthBuffer;
+    __GLdrawableBuffer stencilBuffer;
+#if __GL_NUMBER_OF_AUX_BUFFERS > 0
+    __GLdrawableBuffer *auxBuffer;
+#endif
+
+    __GLdrawableRegion ownershipRegion;
+
+    /*
+    ** Lock for the drawable private structure
+    */
+    void *lock;
+#ifdef DEBUG
+    /* lock debugging info */
+    int lockRefCount;
+    int lockLine[10];
+    char *lockFile[10];
+#endif
+
+    /* imported */
+    void *(*malloc)(size_t size);
+    void *(*calloc)(size_t numElem, size_t elemSize);
+    void *(*realloc)(void *oldAddr, size_t newSize);
+    void (*free)(void *addr);
+
+    GLboolean (*addSwapRect)(__GLdrawablePrivate *glPriv, 
+			     GLint x, GLint y, GLsizei width, GLsizei height);
+    void (*setClipRect)(__GLdrawablePrivate *glPriv, 
+			GLint x, GLint y, GLsizei width, GLsizei height);
+    void (*updateClipRegion)(__GLdrawablePrivate *glPriv);
+    GLboolean (*resize)(__GLdrawablePrivate *glPriv);
+    void (*getDrawableSize)(__GLdrawablePrivate *glPriv, 
+			    GLint *x, GLint *y, GLuint *width, GLuint *height);
+
+    void (*lockDP)(__GLdrawablePrivate *glPriv, __GLcontext *gc);
+    void (*unlockDP)(__GLdrawablePrivate *glPriv);
+
+    /* exported */
+    void *wsPriv;	/* pointer to the window system DrawablePrivate */
+#ifdef __cplusplus
+    void *privatePtr;
+#else
+    void *private;
+#endif
+    void (*freePrivate)(__GLdrawablePrivate *);
+
+    /* client data */
+    void *other;
+};
+
+/*
+** Macros to lock/unlock the drawable private
+*/
+#if defined(DEBUG)
+#define __GL_LOCK_DP(glPriv,gc) \
+    (*(glPriv)->lockDP)(glPriv,gc); \
+    (glPriv)->lockLine[(glPriv)->lockRefCount] = __LINE__; \
+    (glPriv)->lockFile[(glPriv)->lockRefCount] = __FILE__; \
+    (glPriv)->lockRefCount++
+#define __GL_UNLOCK_DP(glPriv) \
+    (glPriv)->lockRefCount--; \
+    (glPriv)->lockLine[(glPriv)->lockRefCount] = 0; \
+    (glPriv)->lockFile[(glPriv)->lockRefCount] = NULL; \
+    (*(glPriv)->unlockDP)(glPriv)
+#else /* DEBUG */
+#define __GL_LOCK_DP(glPriv,gc)		(*(glPriv)->lockDP)(glPriv,gc)
+#define	__GL_UNLOCK_DP(glPriv)		(*(glPriv)->unlockDP)(glPriv)
+#endif /* DEBUG */
+
+
+/*
+** Procedures which are imported by the GL from the surrounding
+** "operating system".  Math functions are not considered part of the
+** "operating system".
+*/
+typedef struct __GLimportsRec {
+    /* Memory management */
+    void * (*malloc)(__GLcontext *gc, size_t size);
+    void *(*calloc)(__GLcontext *gc, size_t numElem, size_t elemSize);
+    void *(*realloc)(__GLcontext *gc, void *oldAddr, size_t newSize);
+    void (*free)(__GLcontext *gc, void *addr);
+
+    /* Error handling */
+    void (*warning)(__GLcontext *gc, char *fmt);
+    void (*fatal)(__GLcontext *gc, char *fmt);
+
+    /* other system calls */
+    char *(CAPI *getenv)(__GLcontext *gc, const char *var);
+    int (CAPI *atoi)(__GLcontext *gc, const char *str);
+    int (CAPI *sprintf)(__GLcontext *gc, char *str, const char *fmt, ...);
+    void *(CAPI *fopen)(__GLcontext *gc, const char *path, const char *mode);
+    int (CAPI *fclose)(__GLcontext *gc, void *stream);
+    int (CAPI *fprintf)(__GLcontext *gc, void *stream, const char *fmt, ...);
+
+    /* Drawing surface management */
+    __GLdrawablePrivate *(*getDrawablePrivate)(__GLcontext *gc);
+
+    /* Pointer to the window system context */
+    void *wscx;
+
+    /* Operating system dependent data goes here */
+    void *other;
+} __GLimports;
+
+/************************************************************************/
+
+/*
+** Procedures which are exported by the GL to the surrounding "operating
+** system" so that it can manage multiple GL context's.
+*/
+typedef struct __GLexportsRec {
+    /* Context management (return GL_FALSE on failure) */
+    GLboolean (*destroyContext)(__GLcontext *gc);
+    GLboolean (*loseCurrent)(__GLcontext *gc);
+    GLboolean (*makeCurrent)(__GLcontext *gc);
+    GLboolean (*shareContext)(__GLcontext *gc, __GLcontext *gcShare);
+    GLboolean (*copyContext)(__GLcontext *dst, const __GLcontext *src, GLuint mask);
+    GLboolean (*forceCurrent)(__GLcontext *gc);
+
+    /* Drawing surface notification callbacks */
+    GLboolean (*notifyResize)(__GLcontext *gc);
+    void (*notifyDestroy)(__GLcontext *gc);
+    void (*notifySwapBuffers)(__GLcontext *gc);
+
+    /* Dispatch table override control for external agents like libGLS */
+    struct __GLdispatchStateRec* (*dispatchExec)(__GLcontext *gc);
+    void (*beginDispatchOverride)(__GLcontext *gc);
+    void (*endDispatchOverride)(__GLcontext *gc);
+} __GLexports;
+
+/************************************************************************/
+
+/*
+** This must be the first member of a __GLcontext structure.  This is the
+** only part of a context that is exposed to the outside world; everything
+** else is opaque.
+*/
+struct __GLinterfaceRec {
+    __GLimports imports;
+    __GLexports exports;
+};
+
+extern __GLcontext *__glCoreCreateContext(__GLimports *, __GLcontextModes *);
+extern void __glCoreNopDispatch(void);
+
+#endif /* __gl_core_h_ */
diff --git a/include/GL/internal/glcore.h b/include/GL/internal/glcore.h
new file mode 100644
index 00000000000..08de6721954
--- /dev/null
+++ b/include/GL/internal/glcore.h
@@ -0,0 +1,397 @@
+#ifndef __gl_core_h_
+#define __gl_core_h_
+
+/* $XFree86: xc/lib/GL/include/GL/internal/glcore.h,v 1.5 1999/06/14 07:23:42 dawes Exp $ */
+/*
+** The contents of this file are subject to the GLX Public License Version 1.0
+** (the "License"). You may not use this file except in compliance with the
+** License. You may obtain a copy of the License at Silicon Graphics, Inc.,
+** attn: Legal Services, 2011 N. Shoreline Blvd., Mountain View, CA 94043
+** or at http://www.sgi.com/software/opensource/glx/license.html.
+**
+** Software distributed under the License is distributed on an "AS IS"
+** basis. ALL WARRANTIES ARE DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY
+** IMPLIED WARRANTIES OF MERCHANTABILITY, OF FITNESS FOR A PARTICULAR
+** PURPOSE OR OF NON- INFRINGEMENT. See the License for the specific
+** language governing rights and limitations under the License.
+**
+** The Original Software is GLX version 1.2 source code, released February,
+** 1999. The developer of the Original Software is Silicon Graphics, Inc.
+** Those portions of the Subject Software created by Silicon Graphics, Inc.
+** are Copyright (c) 1991-9 Silicon Graphics, Inc. All Rights Reserved.
+**
+** $SGI$
+*/
+
+#ifndef XFree86LOADER
+#include <sys/types.h>
+#endif
+
+#define GL_CORE_SGI  1
+#define GL_CORE_MESA 2
+
+typedef struct __GLcontextRec __GLcontext;
+typedef struct __GLinterfaceRec __GLinterface;
+
+/*
+** This file defines the interface between the GL core and the surrounding
+** "operating system" that supports it (currently the GLX or WGL extensions).
+**
+** Members (data and function pointers) are documented as imported or
+** exported according to how they are used by the core rendering functions.
+** Imported members are initialized by the "operating system" and used by
+** the core functions.  Exported members are initialized by the core functions
+** and used by the "operating system".
+*/
+
+/*
+** Mode and limit information for a context.  This information is
+** kept around in the context so that values can be used during
+** command execution, and for returning information about the
+** context to the application.
+*/
+typedef struct __GLcontextModesRec {
+    GLboolean rgbMode;
+    GLboolean colorIndexMode;
+    GLboolean doubleBufferMode;
+    GLboolean stereoMode;
+
+    GLboolean haveAccumBuffer;
+    GLboolean haveDepthBuffer;
+    GLboolean haveStencilBuffer;
+
+    GLint redBits, greenBits, blueBits, alphaBits;	/* bits per comp */
+    GLuint redMask, greenMask, blueMask, alphaMask;
+    GLint rgbBits;		/* total bits for rgb */
+    GLint indexBits;		/* total bits for colorindex */
+
+    GLint accumRedBits, accumGreenBits, accumBlueBits, accumAlphaBits;
+    GLint depthBits;
+    GLint stencilBits;
+
+    GLint numAuxBuffers;
+
+    GLint level;
+
+    GLint pixmapMode;
+} __GLcontextModes;
+
+/************************************************************************/
+
+/*
+** Structure used for allocating and freeing drawable private memory.
+** (like software buffers, for example).
+**
+** The memory allocation routines are provided by the surrounding
+** "operating system" code, and they are to be used for allocating
+** software buffers and things which are associated with the drawable,
+** and used by any context which draws to that drawable.  There are
+** separate memory allocation functions for drawables and contexts
+** since drawables and contexts can be created and destroyed independently
+** of one another, and the "operating system" may want to use separate
+** allocation arenas for each.
+**
+** The freePrivate function is filled in by the core routines when they
+** allocates software buffers, and stick them in "private".  The freePrivate
+** function will destroy anything allocated to this drawable (to be called
+** when the drawable is destroyed).
+*/
+typedef struct __GLdrawableRegionRec __GLdrawableRegion;
+typedef struct __GLdrawableBufferRec __GLdrawableBuffer;
+typedef struct __GLdrawablePrivateRec __GLdrawablePrivate;
+
+typedef struct __GLregionRectRec {
+    /* lower left (inside the rectangle) */
+    GLint x0, y0;
+    /* upper right (outside the rectangle) */
+    GLint x1, y1;
+} __GLregionRect;
+
+struct __GLdrawableRegionRec {
+    GLint numRects;
+    __GLregionRect *rects;
+    __GLregionRect boundingRect;
+};
+
+/************************************************************************/
+
+/* masks for the buffers */
+#define __GL_FRONT_BUFFER_MASK		0x00000001
+#define	__GL_FRONT_LEFT_BUFFER_MASK	0x00000001
+#define	__GL_FRONT_RIGHT_BUFFER_MASK	0x00000002
+#define	__GL_BACK_BUFFER_MASK		0x00000004
+#define __GL_BACK_LEFT_BUFFER_MASK	0x00000004
+#define __GL_BACK_RIGHT_BUFFER_MASK	0x00000008
+#define	__GL_ACCUM_BUFFER_MASK		0x00000010
+#define	__GL_DEPTH_BUFFER_MASK		0x00000020
+#define	__GL_STENCIL_BUFFER_MASK	0x00000040
+#define	__GL_AUX_BUFFER_MASK(i)		(0x0000080 << (i))
+
+#define __GL_ALL_BUFFER_MASK		0xffffffff
+
+/* what Resize routines return if resize resorted to fallback case */
+#define __GL_BUFFER_FALLBACK	0x10
+
+typedef void (*__GLbufFallbackInitFn)(__GLdrawableBuffer *buf, 
+				      __GLdrawablePrivate *glPriv, GLint bits);
+typedef void (*__GLbufMainInitFn)(__GLdrawableBuffer *buf, 
+				  __GLdrawablePrivate *glPriv, GLint bits,
+				  __GLbufFallbackInitFn back);
+
+/*
+** A drawable buffer
+**
+** This data structure describes the context side of a drawable.  
+**
+** According to the spec there could be multiple contexts bound to the same
+** drawable at the same time (from different threads).  In order to avoid
+** multiple-access conflicts, locks are used to serialize access.  When a
+** thread needs to access (read or write) a member of the drawable, it takes
+** a lock first.  Some of the entries in the drawable are treated "mostly
+** constant", so we take the freedom of allowing access to them without
+** taking a lock (for optimization reasons).
+**
+** For more details regarding locking, see buffers.h in the GL core
+*/
+struct __GLdrawableBufferRec {
+    /*
+    ** Buffer dimensions
+    */
+    GLint width, height, depth;
+
+    /*
+    ** Framebuffer base address
+    */
+    void *base;
+
+    /*
+    ** Framebuffer size (in bytes)
+    */
+    GLuint size;
+
+    /*
+    ** Size (in bytes) of each element in the framebuffer
+    */
+    GLuint elementSize;
+    GLuint elementSizeLog2;
+
+    /*
+    ** Element skip from one scanline to the next.
+    ** If the buffer is part of another buffer (for example, fullscreen
+    ** front buffer), outerWidth is the width of that buffer.
+    */
+    GLint outerWidth;
+
+    /*
+    ** outerWidth * elementSize
+    */
+    GLint byteWidth;
+
+    /*
+    ** Allocation/deallocation is done based on this handle.  A handle
+    ** is conceptually different from the framebuffer 'base'.
+    */
+    void *handle;
+
+    /* imported */
+    GLboolean (*resize)(__GLdrawableBuffer *buf,
+			GLint x, GLint y, GLuint width, GLuint height, 
+			__GLdrawablePrivate *glPriv, GLuint bufferMask);
+    void (*lock)(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv);
+    void (*unlock)(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv);
+    void (*fill)(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv,
+    		GLuint val, GLint x, GLint y, GLint w, GLint h);
+    void (*free)(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv);
+    void *other;
+
+    /* exported */
+    void (*freePrivate)(__GLdrawableBuffer *buf, __GLdrawablePrivate *glPriv);
+    void *private;
+
+    /* private */
+    __GLbufMainInitFn mainInit;
+    __GLbufFallbackInitFn fallbackInit;
+};
+
+/*
+** The context side of the drawable private
+*/
+struct __GLdrawablePrivateRec {
+    /*
+    ** Drawable Modes
+    */
+    __GLcontextModes *modes;
+
+    /*
+    ** Drawable size
+    */
+    GLuint width, height;
+
+    /*
+    ** Origin in screen coordinates of the drawable
+    */
+    GLint xOrigin, yOrigin;
+#ifdef __GL_ALIGNED_BUFFERS
+    /*
+    ** Drawable offset from screen origin
+    */
+    GLint xOffset, yOffset;
+
+    /*
+    ** Alignment restriction
+    */
+    GLint xAlignment, yAlignment;
+#endif
+    /*
+    ** Should we invert the y axis?
+    */
+    GLint yInverted;
+
+    /*
+    ** Mask specifying which buffers are renderable by the hw
+    */
+    GLuint accelBufferMask;
+
+    /*
+    ** the buffers themselves
+    */
+    __GLdrawableBuffer frontBuffer;
+    __GLdrawableBuffer backBuffer;
+    __GLdrawableBuffer accumBuffer;
+    __GLdrawableBuffer depthBuffer;
+    __GLdrawableBuffer stencilBuffer;
+#if defined(__GL_NUMBER_OF_AUX_BUFFERS) && (__GL_NUMBER_OF_AUX_BUFFERS > 0)
+    __GLdrawableBuffer *auxBuffer;
+#endif
+
+    __GLdrawableRegion ownershipRegion;
+
+    /*
+    ** Lock for the drawable private structure
+    */
+    void *lock;
+#ifdef DEBUG
+    /* lock debugging info */
+    int lockRefCount;
+    int lockLine[10];
+    char *lockFile[10];
+#endif
+
+    /* imported */
+    void *(*malloc)(size_t size);
+    void *(*calloc)(size_t numElem, size_t elemSize);
+    void *(*realloc)(void *oldAddr, size_t newSize);
+    void (*free)(void *addr);
+
+    GLboolean (*addSwapRect)(__GLdrawablePrivate *glPriv, 
+			     GLint x, GLint y, GLsizei width, GLsizei height);
+    void (*setClipRect)(__GLdrawablePrivate *glPriv, 
+			GLint x, GLint y, GLsizei width, GLsizei height);
+    void (*updateClipRegion)(__GLdrawablePrivate *glPriv);
+    GLboolean (*resize)(__GLdrawablePrivate *glPriv);
+    void (*getDrawableSize)(__GLdrawablePrivate *glPriv, 
+			    GLint *x, GLint *y, GLuint *width, GLuint *height);
+
+    void (*lockDP)(__GLdrawablePrivate *glPriv, __GLcontext *gc);
+    void (*unlockDP)(__GLdrawablePrivate *glPriv);
+
+
+    void *other;
+
+    /* exported */
+    void (*freePrivate)(__GLdrawablePrivate *);
+    void *private;
+};
+
+/*
+** Macros to lock/unlock the drawable private
+*/
+#if defined(DEBUG)
+#define __GL_LOCK_DP(glPriv,gc) \
+    (*(glPriv)->lockDP)(glPriv,gc); \
+    (glPriv)->lockLine[(glPriv)->lockRefCount] = __LINE__; \
+    (glPriv)->lockFile[(glPriv)->lockRefCount] = __FILE__; \
+    (glPriv)->lockRefCount++
+#define __GL_UNLOCK_DP(glPriv) \
+    (glPriv)->lockRefCount--; \
+    (glPriv)->lockLine[(glPriv)->lockRefCount] = 0; \
+    (glPriv)->lockFile[(glPriv)->lockRefCount] = NULL; \
+    (*(glPriv)->unlockDP)(glPriv)
+#else /* DEBUG */
+#define __GL_LOCK_DP(glPriv,gc)		(*(glPriv)->lockDP)(glPriv,gc)
+#define	__GL_UNLOCK_DP(glPriv)		(*(glPriv)->unlockDP)(glPriv)
+#endif /* DEBUG */
+
+
+/*
+** Procedures which are imported by the GL from the surrounding
+** "operating system".  Math functions are not considered part of the
+** "operating system".
+*/
+typedef struct __GLimportsRec {
+    /* Memory management */
+    void *(*malloc)(__GLcontext *gc, size_t size);
+    void *(*calloc)(__GLcontext *gc, size_t numElem, size_t elemSize);
+    void *(*realloc)(__GLcontext *gc, void *oldAddr, size_t newSize);
+    void (*free)(__GLcontext *gc, void *addr);
+
+    /* Error handling */
+    void (*warning)(__GLcontext *gc, char *fmt);
+    void (*fatal)(__GLcontext *gc, char *fmt);
+
+    /* other system calls */
+    char *(*getenv)(__GLcontext *gc, const char *var);
+    int (*sprintf)(__GLcontext *gc, char *str, const char *fmt, ...);
+    void *(*fopen)(__GLcontext *gc, const char *path, const char *mode);
+    int (*fclose)(__GLcontext *gc, void *stream);
+    int (*fprintf)(__GLcontext *gc, void *stream, const char *fmt, ...);
+
+    /* Drawing surface management */
+    __GLdrawablePrivate *(*getDrawablePrivate)(__GLcontext *gc);
+
+    /* Operating system dependent data goes here */
+    void *other;
+} __GLimports;
+
+/************************************************************************/
+
+/*
+** Procedures which are exported by the GL to the surrounding "operating
+** system" so that it can manage multiple GL context's.
+*/
+typedef struct __GLexportsRec {
+    /* Context management (return GL_FALSE on failure) */
+    GLboolean (*destroyContext)(__GLcontext *gc);
+    GLboolean (*loseCurrent)(__GLcontext *gc);
+    GLboolean (*makeCurrent)(__GLcontext *gc, __GLdrawablePrivate *glPriv);
+    GLboolean (*shareContext)(__GLcontext *gc, __GLcontext *gcShare);
+    GLboolean (*copyContext)(__GLcontext *dst, const __GLcontext *src, GLuint mask);
+    GLboolean (*forceCurrent)(__GLcontext *gc);
+
+    /* Drawing surface notification callbacks */
+    GLboolean (*notifyResize)(__GLcontext *gc);
+    void (*notifyDestroy)(__GLcontext *gc);
+    void (*notifySwapBuffers)(__GLcontext *gc);
+
+    /* Dispatch table override control for external agents like libGLS */
+    struct __GLdispatchStateRec* (*dispatchExec)(__GLcontext *gc);
+    void (*beginDispatchOverride)(__GLcontext *gc);
+    void (*endDispatchOverride)(__GLcontext *gc);
+} __GLexports;
+
+/************************************************************************/
+
+/*
+** This must be the first member of a __GLcontext structure.  This is the
+** only part of a context that is exposed to the outside world; everything
+** else is opaque.
+*/
+struct __GLinterfaceRec {
+    __GLimports imports;
+    __GLexports exports;
+};
+
+extern __GLcontext *__glCoreCreateContext(__GLimports *, __GLcontextModes *);
+extern void __glCoreNopDispatch(void);
+
+#endif /* __gl_core_h_ */