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/* $XFree86: xc/lib/GL/include/GL/internal/glcore.h,v 1.7 2001/03/25 05:32:00 tsi Exp $ */
#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.
**
*/
#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);
/* 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 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);
/* exported */
#if 0 /* disable, just like in __GLimportsRec */
void *wsPriv; /* pointer to the window system DrawablePrivate */
#endif
#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);
#if 0
/* At some point, this field got removed from the XFree86 glcore.h file.
* we're removing it here to prevent interop problems. (Brian)
*/
/* Pointer to the window system context */
void *wscx;
#endif
/* 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_ */