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+/*
+** 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.
+*/
+/* $XFree86: xc/lib/GL/glx/glxclient.h,v 1.21 2004/02/09 23:46:31 alanh Exp $ */
+
+/**
+ * \file glxclient.h
+ * Direct rendering support added by Precision Insight, Inc.
+ *
+ * \author Kevin E. Martin <kevin@precisioninsight.com>
+ */
+
+#ifndef _GLX_client_h_
+#define _GLX_client_h_
+#define NEED_REPLIES
+#define NEED_EVENTS
+#include <X11/Xproto.h>
+#include <X11/Xlibint.h>
+#define GLX_GLXEXT_PROTOTYPES
+#include <GL/glx.h>
+#include <GL/glxext.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#ifdef WIN32
+#include <stdint.h>
+#endif
+#include "GL/glxint.h"
+#include "GL/glxproto.h"
+#include "GL/internal/glcore.h"
+#include "glapitable.h"
+#include "glxextensions.h"
+#if defined( USE_XTHREADS )
+# include <X11/Xthreads.h>
+#elif defined( PTHREADS )
+# include <pthread.h>
+#endif
+
+#define GLX_MAJOR_VERSION 1 /* current version numbers */
+#define GLX_MINOR_VERSION 4
+
+#define __GLX_MAX_TEXTURE_UNITS 32
+
+typedef struct __GLXcontextRec __GLXcontext;
+typedef struct __GLXdisplayPrivateRec __GLXdisplayPrivate;
+typedef struct _glapi_table __GLapi;
+
+/************************************************************************/
+
+#ifdef GLX_DIRECT_RENDERING
+
+#include <GL/internal/dri_interface.h>
+
+
+/**
+ * Display dependent methods. This structure is initialized during the
+ * \c driCreateDisplay call.
+ */
+struct __DRIdisplayRec {
+ /**
+ * Method to destroy the private DRI display data.
+ */
+ void (*destroyDisplay)(Display *dpy, void *displayPrivate);
+
+ /**
+ * Opaque pointer to private per display direct rendering data.
+ * \c NULL if direct rendering is not supported on this display.
+ */
+ struct __DRIdisplayPrivateRec *private;
+
+ /**
+ * Array of pointers to methods to create and initialize the private DRI
+ * screen data.
+ */
+ PFNCREATENEWSCREENFUNC * createNewScreen;
+};
+
+
+/*
+** We keep a linked list of these structures, one per DRI device driver.
+*/
+struct __DRIdriverRec {
+ const char *name;
+ void *handle;
+ PFNCREATENEWSCREENFUNC createNewScreenFunc;
+ struct __DRIdriverRec *next;
+};
+
+/*
+** Function to create and DRI display data and initialize the display
+** dependent methods.
+*/
+extern void *driCreateDisplay(Display *dpy, __DRIdisplay *pdisp);
+
+extern __DRIdriver *driGetDriver(Display *dpy, int scrNum);
+
+extern void DRI_glXUseXFont( Font font, int first, int count, int listbase );
+
+/*
+** Functions to obtain driver configuration information from a direct
+** rendering client application
+*/
+extern const char *glXGetScreenDriver (Display *dpy, int scrNum);
+
+extern const char *glXGetDriverConfig (const char *driverName);
+
+extern Bool __glXWindowExists(Display *dpy, GLXDrawable draw);
+
+#endif
+
+/************************************************************************/
+
+#define __GL_CLIENT_ATTRIB_STACK_DEPTH 16
+
+typedef struct __GLXpixelStoreModeRec {
+ GLboolean swapEndian;
+ GLboolean lsbFirst;
+ GLuint rowLength;
+ GLuint imageHeight;
+ GLuint imageDepth;
+ GLuint skipRows;
+ GLuint skipPixels;
+ GLuint skipImages;
+ GLuint alignment;
+} __GLXpixelStoreMode;
+
+
+typedef struct __GLXattributeRec {
+ GLuint mask;
+
+ /**
+ * Pixel storage state. Most of the pixel store mode state is kept
+ * here and used by the client code to manage the packing and
+ * unpacking of data sent to/received from the server.
+ */
+ __GLXpixelStoreMode storePack, storeUnpack;
+
+ /**
+ * Is EXT_vertex_array / GL 1.1 DrawArrays protocol specifically
+ * disabled?
+ */
+ GLboolean NoDrawArraysProtocol;
+
+ /**
+ * Vertex Array storage state. The vertex array component
+ * state is stored here and is used to manage the packing of
+ * DrawArrays data sent to the server.
+ */
+ struct array_state_vector * array_state;
+} __GLXattribute;
+
+typedef struct __GLXattributeMachineRec {
+ __GLXattribute *stack[__GL_CLIENT_ATTRIB_STACK_DEPTH];
+ __GLXattribute **stackPointer;
+} __GLXattributeMachine;
+
+/**
+ * GLX state that needs to be kept on the client. One of these records
+ * exist for each context that has been made current by this client.
+ */
+struct __GLXcontextRec {
+ /**
+ * \name Drawing command buffer.
+ *
+ * Drawing commands are packed into this buffer before being sent as a
+ * single GLX protocol request. The buffer is sent when it overflows or
+ * is flushed by \c __glXFlushRenderBuffer. \c pc is the next location
+ * in the buffer to be filled. \c limit is described above in the buffer
+ * slop discussion.
+ *
+ * Commands that require large amounts of data to be transfered will
+ * also use this buffer to hold a header that describes the large
+ * command.
+ *
+ * These must be the first 6 fields since they are static initialized
+ * in the dummy context in glxext.c
+ */
+ /*@{*/
+ GLubyte *buf;
+ GLubyte *pc;
+ GLubyte *limit;
+ GLubyte *bufEnd;
+ GLint bufSize;
+ /*@}*/
+
+ /**
+ * The XID of this rendering context. When the context is created a
+ * new XID is allocated. This is set to None when the context is
+ * destroyed but is still current to some thread. In this case the
+ * context will be freed on next MakeCurrent.
+ */
+ XID xid;
+
+ /**
+ * The XID of the \c shareList context.
+ */
+ XID share_xid;
+
+ /**
+ * Visual id.
+ *
+ * \deprecated
+ * This filed has been largely been replaced by the \c mode field, but
+ * the work is not quite done.
+ */
+ VisualID vid;
+
+ /**
+ * Screen number.
+ */
+ GLint screen;
+
+ /**
+ * \c GL_TRUE if the context was created with ImportContext, which
+ * means the server-side context was created by another X client.
+ */
+ GLboolean imported;
+
+ /**
+ * The context tag returned by MakeCurrent when this context is made
+ * current. This tag is used to identify the context that a thread has
+ * current so that proper server context management can be done. It is
+ * used for all context specific commands (i.e., \c Render, \c RenderLarge,
+ * \c WaitX, \c WaitGL, \c UseXFont, and \c MakeCurrent (for the old
+ * context)).
+ */
+ GLXContextTag currentContextTag;
+
+ /**
+ * \name Rendering mode
+ *
+ * The rendering mode is kept on the client as well as the server.
+ * When \c glRenderMode is called, the buffer associated with the
+ * previous rendering mode (feedback or select) is filled.
+ */
+ /*@{*/
+ GLenum renderMode;
+ GLfloat *feedbackBuf;
+ GLuint *selectBuf;
+ /*@}*/
+
+ /**
+ * This is \c GL_TRUE if the pixel unpack modes are such that an image
+ * can be unpacked from the clients memory by just copying. It may
+ * still be true that the server will have to do some work. This
+ * just promises that a straight copy will fetch the correct bytes.
+ */
+ GLboolean fastImageUnpack;
+
+ /**
+ * Fill newImage with the unpacked form of \c oldImage getting it
+ * ready for transport to the server.
+ */
+ void (*fillImage)(__GLXcontext*, GLint, GLint, GLint, GLint, GLenum,
+ GLenum, const GLvoid*, GLubyte*, GLubyte*);
+
+ /**
+ * Client side attribs.
+ */
+ __GLXattributeMachine attributes;
+
+ /**
+ * Client side error code. This is set when client side gl API
+ * routines need to set an error because of a bad enumerant or
+ * running out of memory, etc.
+ */
+ GLenum error;
+
+ /**
+ * Whether this context does direct rendering.
+ */
+ Bool isDirect;
+
+ /**
+ * \c dpy of current display for this context. Will be \c NULL if not
+ * current to any display, or if this is the "dummy context".
+ */
+ Display *currentDpy;
+
+ /**
+ * The current drawable for this context. Will be None if this
+ * context is not current to any drawable. currentReadable is below.
+ */
+ GLXDrawable currentDrawable;
+
+ /**
+ * \name GL Constant Strings
+ *
+ * Constant strings that describe the server implementation
+ * These pertain to GL attributes, not to be confused with
+ * GLX versioning attributes.
+ */
+ /*@{*/
+ GLubyte *vendor;
+ GLubyte *renderer;
+ GLubyte *version;
+ GLubyte *extensions;
+ /*@}*/
+
+ /**
+ * Record the dpy this context was created on for later freeing
+ */
+ Display *createDpy;
+
+ /**
+ * Maximum small render command size. This is the smaller of 64k and
+ * the size of the above buffer.
+ */
+ GLint maxSmallRenderCommandSize;
+
+ /**
+ * Major opcode for the extension. Copied here so a lookup isn't
+ * needed.
+ */
+ GLint majorOpcode;
+
+#ifdef GLX_DIRECT_RENDERING
+ /**
+ * Per context direct rendering interface functions and data.
+ */
+ __DRIcontext driContext;
+#endif
+
+ /**
+ * \c GLXFBConfigID used to create this context. May be \c None. This
+ * field has been replaced by the \c mode field.
+ *
+ * \since Internal API version 20030317.
+ *
+ * \deprecated
+ * This filed has been largely been replaced by the \c mode field, but
+ * the work is not quite done.
+ */
+ GLXFBConfigID fbconfigID;
+
+ /**
+ * The current read-drawable for this context. Will be None if this
+ * context is not current to any drawable.
+ *
+ * \since Internal API version 20030606.
+ */
+ GLXDrawable currentReadable;
+
+ /**
+ * Pointer to client-state data that is private to libGL. This is only
+ * used for indirect rendering contexts.
+ *
+ * No internal API version change was made for this change. Client-side
+ * drivers should NEVER use this data or even care that it exists.
+ */
+ void * client_state_private;
+
+ /**
+ * Stored value for \c glXQueryContext attribute \c GLX_RENDER_TYPE.
+ */
+ int renderType;
+
+ /**
+ * \name Raw server GL version
+ *
+ * True core GL version supported by the server. This is the raw value
+ * returned by the server, and it may not reflect what is actually
+ * supported (or reported) by the client-side library.
+ */
+ /*@{*/
+ int server_major; /**< Major version number. */
+ int server_minor; /**< Minor version number. */
+ /*@}*/
+
+ char gl_extension_bits[ __GL_EXT_BYTES ];
+};
+
+#define __glXSetError(gc,code) \
+ if (!(gc)->error) { \
+ (gc)->error = code; \
+ }
+
+extern void __glFreeAttributeState(__GLXcontext *);
+
+/************************************************************************/
+
+/**
+ * The size of the largest drawing command known to the implementation
+ * that will use the GLXRender GLX command. In this case it is
+ * \c glPolygonStipple.
+ */
+#define __GLX_MAX_SMALL_RENDER_CMD_SIZE 156
+
+/**
+ * To keep the implementation fast, the code uses a "limit" pointer
+ * to determine when the drawing command buffer is too full to hold
+ * another fixed size command. This constant defines the amount of
+ * space that must always be available in the drawing command buffer
+ * at all times for the implementation to work. It is important that
+ * the number be just large enough, but not so large as to reduce the
+ * efficacy of the buffer. The "+32" is just to keep the code working
+ * in case somebody counts wrong.
+ */
+#define __GLX_BUFFER_LIMIT_SIZE (__GLX_MAX_SMALL_RENDER_CMD_SIZE + 32)
+
+/**
+ * This implementation uses a smaller threshold for switching
+ * to the RenderLarge protocol than the protcol requires so that
+ * large copies don't occur.
+ */
+#define __GLX_RENDER_CMD_SIZE_LIMIT 4096
+
+/**
+ * One of these records exists per screen of the display. It contains
+ * a pointer to the config data for that screen (if the screen supports GL).
+ */
+typedef struct __GLXscreenConfigsRec {
+ /**
+ * GLX extension string reported by the X-server.
+ */
+ const char *serverGLXexts;
+
+ /**
+ * GLX extension string to be reported to applications. This is the
+ * set of extensions that the application can actually use.
+ */
+ char *effectiveGLXexts;
+
+#ifdef GLX_DIRECT_RENDERING
+ /**
+ * Per screen direct rendering interface functions and data.
+ */
+ __DRIscreen driScreen;
+#endif
+
+ /**
+ * Linked list of configurations for this screen.
+ */
+ __GLcontextModes *configs;
+
+ /**
+ * Per-screen dynamic GLX extension tracking. The \c direct_support
+ * field only contains enough bits for 64 extensions. Should libGL
+ * ever need to track more than 64 GLX extensions, we can safely grow
+ * this field. The \c __GLXscreenConfigs structure is not used outside
+ * libGL.
+ */
+ /*@{*/
+ unsigned char direct_support[8];
+ GLboolean ext_list_first_time;
+ /*@}*/
+
+} __GLXscreenConfigs;
+
+/**
+ * Per display private data. One of these records exists for each display
+ * that is using the OpenGL (GLX) extension.
+ */
+struct __GLXdisplayPrivateRec {
+ /**
+ * Back pointer to the display
+ */
+ Display *dpy;
+
+ /**
+ * The \c majorOpcode is common to all connections to the same server.
+ * It is also copied into the context structure.
+ */
+ int majorOpcode;
+
+ /**
+ * \name Server Version
+ *
+ * Major and minor version returned by the server during initialization.
+ */
+ /*@{*/
+ int majorVersion, minorVersion;
+ /*@}*/
+
+ /**
+ * \name Storage for the servers GLX vendor and versions strings.
+ *
+ * These are the same for all screens on this display. These fields will
+ * be filled in on demand.
+ */
+ /*@{*/
+ const char *serverGLXvendor;
+ const char *serverGLXversion;
+ /*@}*/
+
+ /**
+ * Configurations of visuals for all screens on this display.
+ * Also, per screen data which now includes the server \c GLX_EXTENSION
+ * string.
+ */
+ __GLXscreenConfigs *screenConfigs;
+
+#ifdef GLX_DIRECT_RENDERING
+ /**
+ * Per display direct rendering interface functions and data.
+ */
+ __DRIdisplay driDisplay;
+#endif
+};
+
+void __glXFreeContext(__GLXcontext*);
+
+extern GLubyte *__glXFlushRenderBuffer(__GLXcontext*, GLubyte*);
+
+extern void __glXSendLargeChunk(__GLXcontext *gc, GLint requestNumber,
+ GLint totalRequests,
+ const GLvoid * data, GLint dataLen);
+
+extern void __glXSendLargeCommand(__GLXcontext *, const GLvoid *, GLint,
+ const GLvoid *, GLint);
+
+/* Initialize the GLX extension for dpy */
+extern __GLXdisplayPrivate *__glXInitialize(Display*);
+
+/************************************************************************/
+
+extern int __glXDebug;
+
+/* This is per-thread storage in an MT environment */
+#if defined( USE_XTHREADS ) || defined( PTHREADS )
+
+extern void __glXSetCurrentContext(__GLXcontext *c);
+
+# if defined( GLX_USE_TLS )
+
+extern __thread void * __glX_tls_Context
+ __attribute__((tls_model("initial-exec")));
+
+# define __glXGetCurrentContext() __glX_tls_Context
+
+# else
+
+extern __GLXcontext *__glXGetCurrentContext(void);
+
+# endif /* defined( GLX_USE_TLS ) */
+
+#else
+
+extern __GLXcontext *__glXcurrentContext;
+#define __glXGetCurrentContext() __glXcurrentContext
+#define __glXSetCurrentContext(gc) __glXcurrentContext = gc
+
+#endif /* defined( USE_XTHREADS ) || defined( PTHREADS ) */
+
+
+/*
+** Global lock for all threads in this address space using the GLX
+** extension
+*/
+#if defined( USE_XTHREADS )
+extern xmutex_rec __glXmutex;
+#define __glXLock() xmutex_lock(&__glXmutex)
+#define __glXUnlock() xmutex_unlock(&__glXmutex)
+#elif defined( PTHREADS )
+extern pthread_mutex_t __glXmutex;
+#define __glXLock() pthread_mutex_lock(&__glXmutex)
+#define __glXUnlock() pthread_mutex_unlock(&__glXmutex)
+#else
+#define __glXLock()
+#define __glXUnlock()
+#endif
+
+/*
+** Setup for a command. Initialize the extension for dpy if necessary.
+*/
+extern CARD8 __glXSetupForCommand(Display *dpy);
+
+/************************************************************************/
+
+/*
+** Data conversion and packing support.
+*/
+
+extern const GLuint __glXDefaultPixelStore[9];
+
+/* Send an image to the server using RenderLarge. */
+extern void __glXSendLargeImage(__GLXcontext *gc, GLint compsize, GLint dim,
+ GLint width, GLint height, GLint depth, GLenum format, GLenum type,
+ const GLvoid *src, GLubyte *pc, GLubyte *modes);
+
+/* Return the size, in bytes, of some pixel data */
+extern GLint __glImageSize(GLint, GLint, GLint, GLenum, GLenum, GLenum);
+
+/* Return the number of elements per group of a specified format*/
+extern GLint __glElementsPerGroup(GLenum format, GLenum type);
+
+/* Return the number of bytes per element, based on the element type (other
+** than GL_BITMAP).
+*/
+extern GLint __glBytesPerElement(GLenum type);
+
+/*
+** Fill the transport buffer with the data from the users buffer,
+** applying some of the pixel store modes (unpack modes) to the data
+** first. As a side effect of this call, the "modes" field is
+** updated to contain the modes needed by the server to decode the
+** sent data.
+*/
+extern void __glFillImage(__GLXcontext*, GLint, GLint, GLint, GLint, GLenum,
+ GLenum, const GLvoid*, GLubyte*, GLubyte*);
+
+/* Copy map data with a stride into a packed buffer */
+extern void __glFillMap1f(GLint, GLint, GLint, const GLfloat *, GLubyte *);
+extern void __glFillMap1d(GLint, GLint, GLint, const GLdouble *, GLubyte *);
+extern void __glFillMap2f(GLint, GLint, GLint, GLint, GLint,
+ const GLfloat *, GLfloat *);
+extern void __glFillMap2d(GLint, GLint, GLint, GLint, GLint,
+ const GLdouble *, GLdouble *);
+
+/*
+** Empty an image out of the reply buffer into the clients memory applying
+** the pack modes to pack back into the clients requested format.
+*/
+extern void __glEmptyImage(__GLXcontext*, GLint, GLint, GLint, GLint, GLenum,
+ GLenum, const GLubyte *, GLvoid *);
+
+
+/*
+** Allocate and Initialize Vertex Array client state
+*/
+extern void __glXInitVertexArrayState(__GLXcontext*);
+
+/*
+** Inform the Server of the major and minor numbers and of the client
+** libraries extension string.
+*/
+extern void __glXClientInfo ( Display *dpy, int opcode );
+
+/************************************************************************/
+
+/*
+** Declarations that should be in Xlib
+*/
+#ifdef __GL_USE_OUR_PROTOTYPES
+extern void _XFlush(Display*);
+extern Status _XReply(Display*, xReply*, int, Bool);
+extern void _XRead(Display*, void*, long);
+extern void _XSend(Display*, const void*, long);
+#endif
+
+
+extern void __glXInitializeVisualConfigFromTags( __GLcontextModes *config,
+ int count, const INT32 *bp, Bool tagged_only, Bool fbconfig_style_tags );
+
+extern char * __glXGetStringFromServer( Display * dpy, int opcode,
+ CARD32 glxCode, CARD32 for_whom, CARD32 name );
+
+extern char *__glXstrdup(const char *str);
+
+
+extern const char __glXGLClientVersion[];
+extern const char __glXGLClientExtensions[];
+
+/* Determine the internal API version */
+extern int __glXGetInternalVersion(void);
+
+/* Get the unadjusted system time */
+extern int __glXGetUST( int64_t * ust );
+
+#endif /* !__GLX_client_h__ */