glxclient.h

Mesa is an open-source implementation of the OpenGL specification - a system for rendering interacti

/*
 * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
 * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice including the dates of first publication and
 * either this permission notice or a reference to
 * http://oss.sgi.com/projects/FreeB/
 * shall be included in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
 * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *
 * Except as contained in this notice, the name of Silicon Graphics, Inc.
 * shall not be used in advertising or otherwise to promote the sale, use or
 * other dealings in this Software without prior written authorization from
 * Silicon Graphics, Inc.
 */

/**
 * \file glxclient.h
 * Direct rendering support added by Precision Insight, Inc.
 *
 * \author Kevin E. Martin <[e-mail]>
 */

#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 "glxhash.h"
#if defined( USE_XTHREADS )
# include <X11/Xthreads.h>
#elif defined( PTHREADS )
# include <pthread.h>
#endif

#include "glxextensions.h"

#define GLX_MAJOR_VERSION	1	/* current version numbers */
#define GLX_MINOR_VERSION	4

#define __GLX_MAX_TEXTURE_UNITS 32

typedef struct __GLXscreenConfigsRec __GLXscreenConfigs;
typedef struct __GLXcontextRec __GLXcontext;
typedef struct __GLXdrawableRec __GLXdrawable;
typedef struct __GLXdisplayPrivateRec __GLXdisplayPrivate;
typedef struct _glapi_table __GLapi;

/************************************************************************/

#ifdef GLX_DIRECT_RENDERING

#define containerOf(ptr, type, member)			\
    (type *)( (char *)ptr - offsetof(type,member) )

#include <GL/internal/dri_interface.h>


/**
 * Display dependent methods.  This structure is initialized during the
 * \c driCreateDisplay call.
 */
typedef struct __GLXDRIdisplayRec __GLXDRIdisplay;
typedef struct __GLXDRIscreenRec __GLXDRIscreen;
typedef struct __GLXDRIdrawableRec __GLXDRIdrawable;
typedef struct __GLXDRIcontextRec __GLXDRIcontext;

#include "glxextensions.h"

struct __GLXDRIdisplayRec {
    /**
     * Method to destroy the private DRI display data.
     */
    void (*destroyDisplay)(__GLXDRIdisplay *display);

    __GLXDRIscreen *(*createScreen)(__GLXscreenConfigs *psc, int screen,
				    __GLXdisplayPrivate *priv);
};

struct __GLXDRIscreenRec {

    void (*destroyScreen)(__GLXscreenConfigs *psc);

    __GLXDRIcontext *(*createContext)(__GLXscreenConfigs *psc,
				      const __GLcontextModes *mode,
				      GLXContext gc,
				      GLXContext shareList, int renderType);
	
    __GLXDRIdrawable *(*createDrawable)(__GLXscreenConfigs *psc,
					XID drawable,
					GLXDrawable glxDrawable,
					const __GLcontextModes *modes);
};

struct __GLXDRIcontextRec {
    void (*destroyContext)(__GLXDRIcontext *context, __GLXscreenConfigs *psc,
			   Display *dpy);
    Bool (*bindContext)(__GLXDRIcontext *context,
			__GLXDRIdrawable *pdraw,
			__GLXDRIdrawable *pread);
    
    void (*unbindContext)(__GLXDRIcontext *context);
};

struct __GLXDRIdrawableRec {
    void (*destroyDrawable)(__GLXDRIdrawable *drawable);

    XID xDrawable;
    XID drawable;
    __GLXscreenConfigs *psc;
    __DRIdrawable *driDrawable;
    GLenum textureTarget;
};

/*
** Function to create and DRI display data and initialize the display
** dependent methods.
*/
extern __GLXDRIdisplay *driswCreateDisplay(Display *dpy);
extern __GLXDRIdisplay *driCreateDisplay(Display *dpy);

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);

#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;

    /**
     * Screen number.
     */
    GLint screen;
    __GLXscreenConfigs *psc;

    /**
     * \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;

    /**
     * Pointer to the mode used to create this context.
     */
    const __GLcontextModes * mode;

#ifdef GLX_DIRECT_RENDERING
    __GLXDRIcontext *driContext;
    __DRIcontext *__driContext;
#endif

    /**