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+/*
+ * Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
+ * (C) Copyright IBM Corporation 2004
+ * 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
+ * on the rights to use, copy, modify, merge, publish, distribute, sub
+ * license, 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 and this permission notice (including the next
+ * paragraph) 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 NON-INFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS AND/OR THEIR SUPPLIERS 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.
+ */
+
+/**
+ * \file dri_interface.h
+ *
+ * This file contains all the types and functions that define the interface
+ * between a DRI driver and driver loader.  Currently, the most common driver
+ * loader is the XFree86 libGL.so.  However, other loaders do exist, and in
+ * the future the server-side libglx.a will also be a loader.
+ * 
+ * \author Kevin E. Martin <kevin@precisioninsight.com>
+ * \author Ian Romanick <idr@us.ibm.com>
+ */
+
+#ifndef DRI_INTERFACE_H
+#define DRI_INTERFACE_H
+
+#ifndef DRI_NEW_INTERFACE_ONLY
+# include <X11/X.h>
+# include <GL/glx.h>
+# include "GL/glxint.h"
+#endif
+
+#include <GL/internal/glcore.h>
+#include <xf86drm.h>
+#include <drm.h>
+
+/**
+ * \name DRI interface structures
+ *
+ * The following structures define the interface between the GLX client
+ * side library and the DRI (direct rendering infrastructure).
+ */
+/*@{*/
+typedef struct __DRIdisplayRec  __DRIdisplay;
+typedef struct __DRIscreenRec   __DRIscreen;
+typedef struct __DRIcontextRec  __DRIcontext;
+typedef struct __DRIdrawableRec __DRIdrawable;
+typedef struct __DRIdriverRec   __DRIdriver;
+typedef struct __DRIframebufferRec __DRIframebuffer;
+typedef struct __DRIversionRec     __DRIversion;
+typedef unsigned long __DRIid;
+typedef void __DRInativeDisplay;
+/*@}*/
+
+
+/**
+ * \name Functions provided by the driver loader.
+ */
+/*@{*/
+extern __DRIscreen *__glXFindDRIScreen(__DRInativeDisplay *dpy, int scrn);
+
+
+/**
+ * Type of a pointer to \c __glXGetInternalVersion, as returned by
+ * \c glXGetProcAddress.
+ *
+ * \sa __glXGetInternalVersion, glXGetProcAddress
+ */
+typedef int (* PFNGLXGETINTERNALVERSIONPROC) ( void );
+
+/**
+ * Type of a pointer to \c __glXWindowExists, as returned by
+ * \c glXGetProcAddress.
+ *
+ * \sa __glXWindowExists, glXGetProcAddress
+ */
+typedef GLboolean (* PFNGLXWINDOWEXISTSPROC) (__DRInativeDisplay *dpy, __DRIid draw);
+
+/**
+ * Type of a pointer to \c __glXGetUST, as returned by \c glXGetProcAddress.
+ * 
+ * \sa __glXGetUST, glXGetProcAddress
+ */
+typedef int (* PFNGLXGETUSTPROC) ( int64_t * ust );
+
+/**
+ * Type of pointer to \c __glXCreateContextModes, as returned by
+ * \c glXGetProcAddress.
+ * 
+ * \sa _gl_context_modes_create, glXGetProcAddress
+ */
+
+typedef __GLcontextModes * (* PFNGLXCREATECONTEXTMODES) ( unsigned count,
+    size_t minimum_bytes_per_struct );
+
+/**
+ * Type of a pointer to \c glXGetScreenDriver, as returned by
+ * \c glXGetProcAddress.  This function is used to get the name of the DRI
+ * driver for the specified screen of the specified display.  The driver
+ * name is typically used with \c glXGetDriverConfig.
+ *
+ * \sa glXGetScreenDriver, glXGetProcAddress, glXGetDriverConfig
+ */
+typedef const char * (* PFNGLXGETSCREENDRIVERPROC) (__DRInativeDisplay *dpy, int scrNum);
+
+/**
+ * Type of a pointer to \c glXGetDriverConfig, as returned by
+ * \c glXGetProcAddress.  This function is used to get the XML document
+ * describing the configuration options available for the specified driver.
+ *
+ * \sa glXGetDriverConfig, glXGetProcAddress, glXGetScreenDriver
+ */
+typedef const char * (* PFNGLXGETDRIVERCONFIGPROC) (const char *driverName);
+
+/**
+ * Type of a pointer to \c __glXScrEnableExtension, as returned by
+ * \c glXGetProcAddress.  This function is used to enable a GLX extension
+ * on the specified screen.
+ *
+ * \sa __glXScrEnableExtension, glXGetProcAddress
+ */
+typedef void (* PFNGLXSCRENABLEEXTENSIONPROC) ( void *psc, const char * name );
+
+/**
+ * Type of a pointer to \c __glXGetDrawableInfo, as returned by
+ * \c glXGetProcAddress.  This function is used to get information about the
+ * position, size, and clip rects of a drawable.
+ * 
+ * \sa __glXGetDrawableInfo, glXGetProcAddress
+ */
+typedef GLboolean (* PFNGLXGETDRAWABLEINFOPROC) ( __DRInativeDisplay *dpy, int scrn,
+    __DRIid draw, unsigned int * index, unsigned int * stamp,
+    int * x, int * y, int * width, int * height,
+    int * numClipRects, drm_clip_rect_t ** pClipRects,
+    int * backX, int * backY,
+    int * numBackClipRects, drm_clip_rect_t ** pBackClipRects );
+
+extern GLboolean XF86DRIDestroyContext( __DRInativeDisplay *dpy, int screen,
+    __DRIid context_id );
+
+extern GLboolean XF86DRICreateDrawable( __DRInativeDisplay *dpy, int screen,
+    __DRIid drawable, drm_drawable_t *hHWDrawable );
+
+extern GLboolean XF86DRIDestroyDrawable( __DRInativeDisplay *dpy, int screen, 
+    __DRIid drawable);
+/*@}*/
+
+
+/**
+ * \name Functions and data provided by the driver.
+ */
+/*@{*/
+
+extern void * __driCreateNewScreen( __DRInativeDisplay *dpy, int scrn, __DRIscreen *psc,
+    const __GLcontextModes * modes, const __DRIversion * ddx_version,
+    const __DRIversion * dri_version, const __DRIversion * drm_version,
+    const __DRIframebuffer * frame_buffer, drmAddress pSAREA, int fd, 
+    int internal_api_version, __GLcontextModes ** driver_modes );
+
+#ifndef DRI_NEW_INTERFACE_ONLY
+
+extern void *__driCreateScreen(Display *dpy, int scrn, __DRIscreen *psc,
+    int numConfigs, __GLXvisualConfig *config);
+
+#endif /* DRI_NEW_INTERFACE_ONLY */
+
+
+/**
+ * XML document describing the configuration options supported by the
+ * driver.
+ */
+extern const char __driConfigOptions[];
+
+/*@}*/
+
+
+/**
+ * Stored version of some component (i.e., server-side DRI module, kernel-side
+ * DRM, etc.).
+ * 
+ * \todo
+ * There are several data structures that explicitly store a major version,
+ * minor version, and patch level.  These structures should be modified to
+ * have a \c __DRIversionRec instead.
+ */
+struct __DRIversionRec {
+    int    major;        /**< Major version number. */
+    int    minor;        /**< Minor version number. */
+    int    patch;        /**< Patch-level. */
+};
+
+/**
+ * Framebuffer information record.  Used by libGL to communicate information
+ * about the framebuffer to the driver's \c __driCreateNewScreen function.
+ * 
+ * In XFree86, most of this information is derrived from data returned by
+ * calling \c XF86DRIGetDeviceInfo.
+ *
+ * \sa XF86DRIGetDeviceInfo __DRIdisplayRec::createNewScreen
+ *     __driUtilCreateNewScreen CallCreateNewScreen
+ *
+ * \bug This structure could be better named.
+ */
+struct __DRIframebufferRec {
+    unsigned char *base;    /**< Framebuffer base address in the CPU's
+			     * address space.  This value is calculated by
+			     * calling \c drmMap on the framebuffer handle
+			     * returned by \c XF86DRIGetDeviceInfo (or a
+			     * similar function).
+			     */
+    int size;               /**< Framebuffer size, in bytes. */
+    int stride;             /**< Number of bytes from one line to the next. */
+    int width;              /**< Pixel width of the framebuffer. */
+    int height;             /**< Pixel height of the framebuffer. */
+    int dev_priv_size;      /**< Size of the driver's dev-priv structure. */
+    void *dev_priv;         /**< Pointer to the driver's dev-priv structure. */
+};
+
+
+/**
+ * Screen dependent methods.  This structure is initialized during the
+ * \c __DRIdisplayRec::createScreen call.
+ */
+struct __DRIscreenRec {
+    /**
+     * Method to destroy the private DRI screen data.
+     */
+    void (*destroyScreen)(__DRInativeDisplay *dpy, int scrn, void *screenPrivate);
+
+    /**
+     * Method to create the private DRI context data and initialize the
+     * context dependent methods.
+     *
+     * \sa __DRIscreenRec::createNewContext driCreateContext 
+     *     driCreateNewContext
+     *
+     * \deprecated
+     * This function has been replaced by \c __DRIscreenRec::createNewContext.
+     * New drivers will continue to export this method, but it will eventually
+     * (in the next XFree86 major relearse) go away.
+     */
+#ifndef DRI_NEW_INTERFACE_ONLY
+    void *(*createContext)(Display *dpy, XVisualInfo *vis, void *sharedPrivate,
+			   __DRIcontext *pctx);
+#else
+    void * createContext;
+#endif /* DRI_NEW_INTERFACE_ONLY */
+
+    /**
+     * Method to create the private DRI drawable data and initialize the
+     * drawable dependent methods.
+     */
+    void *(*createNewDrawable)(__DRInativeDisplay *dpy, const __GLcontextModes *modes,
+			       __DRIid draw, __DRIdrawable *pdraw,
+			       int renderType, const int *attrs);
+
+    /**
+     * Method to return a pointer to the DRI drawable data.
+     */
+    __DRIdrawable *(*getDrawable)(__DRInativeDisplay *dpy, __DRIid draw,
+				  void *drawablePrivate);
+
+    /**
+     * Opaque pointer to private per screen direct rendering data.  \c NULL
+     * if direct rendering is not supported on this screen.  Never
+     * dereferenced in libGL.
+     */
+    void *private;
+
+    /**
+     * Get the number of vertical refreshes since some point in time before
+     * this function was first called (i.e., system start up).
+     * 
+     * \since Internal API version 20030317.
+     */
+    int (*getMSC)( void *screenPrivate, int64_t *msc );
+
+    /**
+     * Opaque pointer that points back to the containing 
+     * \c __GLXscreenConfigs.  This data structure is shared with DRI drivers
+     * but \c __GLXscreenConfigs is not. However, they are needed by some GLX
+     * functions called by DRI drivers.
+     *
+     * \since Internal API version 20030813.
+     */
+    void *screenConfigs;
+
+    /**
+     * Functions associated with MESA_allocate_memory.
+     *
+     * \since Internal API version 20030815.
+     */
+    /*@{*/
+    void *(*allocateMemory)(__DRInativeDisplay *dpy, int scrn, GLsizei size,
+			    GLfloat readfreq, GLfloat writefreq,
+			    GLfloat priority);
+   
+    void (*freeMemory)(__DRInativeDisplay *dpy, int scrn, GLvoid *pointer);
+   
+    GLuint (*memoryOffset)(__DRInativeDisplay *dpy, int scrn, const GLvoid *pointer);
+    /*@}*/
+
+    /**
+     * Method to create the private DRI context data and initialize the
+     * context dependent methods.
+     *
+     * \since Internal API version 20031201.
+     */
+    void * (*createNewContext)(__DRInativeDisplay *dpy, const __GLcontextModes *modes,
+			       int render_type,
+			       void *sharedPrivate, __DRIcontext *pctx);
+};
+
+/**
+ * Context dependent methods.  This structure is initialized during the
+ * \c __DRIscreenRec::createContext call.
+ */
+struct __DRIcontextRec {
+    /**
+     * Method to destroy the private DRI context data.
+     */
+    void (*destroyContext)(__DRInativeDisplay *dpy, int scrn, void *contextPrivate);
+
+    /**
+     * Method to bind a DRI drawable to a DRI graphics context.
+     *
+     * \deprecated Replaced by bindContext3.
+     */
+#ifndef DRI_NEW_INTERFACE_ONLY
+    Bool (*bindContext)(Display *dpy, int scrn, GLXDrawable draw,
+			GLXContext gc);
+#else
+    void *bindContext;
+#endif /* DRI_NEW_INTERFACE_ONLY */
+
+    /**
+     * Method to unbind a DRI drawable to a DRI graphics context.
+     *
+     * \deprecated Replaced by unbindContext3.
+     */
+#ifndef DRI_NEW_INTERFACE_ONLY
+    Bool (*unbindContext)(Display *dpy, int scrn, GLXDrawable draw,
+			  GLXContext gc, int will_rebind);
+#else
+    void *unbindContext;
+#endif /* DRI_NEW_INTERFACE_ONLY */
+
+    /**
+     * Opaque pointer to private per context direct rendering data.
+     * \c NULL if direct rendering is not supported on the display or
+     * screen used to create this context.  Never dereferenced in libGL.
+     */
+    void *private;
+
+    /**
+     * Method to bind a DRI drawable to a DRI graphics context.
+     *
+     * \since Internal API version 20030606.
+     * \deprecated Replaced by bindContext3.
+     */
+#ifndef DRI_NEW_INTERFACE_ONLY
+    Bool (*bindContext2)(Display *dpy, int scrn, GLXDrawable draw,
+			 GLXDrawable read, GLXContext gc);
+#else
+    void *bindContext2;
+#endif /* DRI_NEW_INTERFACE_ONLY */
+
+    /**
+     * Method to unbind a DRI drawable from a DRI graphics context.
+     *
+     * \since Internal API version 20030606.
+     * \deprecated Replaced by unbindContext3.
+     */
+#ifndef DRI_NEW_INTERFACE_ONLY
+    Bool (*unbindContext2)(Display *dpy, int scrn, GLXDrawable draw,
+			   GLXDrawable read, GLXContext gc);
+#else
+    void *unbindContext2;
+#endif /* DRI_NEW_INTERFACE_ONLY */
+
+    /**
+     * Pointer to the mode used to create this context.
+     *
+     * \since Internal API version 20040317.
+     */
+    const __GLcontextModes * mode;
+
+    /**
+     * Method to bind a DRI drawable to a DRI graphics context.
+     *
+     * \since Internal API version 20040415.
+     */
+    GLboolean (*bindContext3)(__DRInativeDisplay *dpy, int scrn, __DRIid draw,
+			 __DRIid read, __DRIcontext *ctx);
+
+    /**
+     * Method to unbind a DRI drawable from a DRI graphics context.
+     *
+     * \since Internal API version 20040415.
+     */
+    GLboolean (*unbindContext3)(__DRInativeDisplay *dpy, int scrn, __DRIid draw,
+			   __DRIid read, __DRIcontext *ctx);
+};
+
+/**
+ * Drawable dependent methods.  This structure is initialized during the
+ * \c __DRIscreenRec::createDrawable call.  \c createDrawable is not called
+ * by libGL at this time.  It's currently used via the dri_util.c utility code
+ * instead.
+ */
+struct __DRIdrawableRec {
+    /**
+     * Method to destroy the private DRI drawable data.
+     */
+    void (*destroyDrawable)(__DRInativeDisplay *dpy, void *drawablePrivate);
+
+    /**
+     * Method to swap the front and back buffers.
+     */
+    void (*swapBuffers)(__DRInativeDisplay *dpy, void *drawablePrivate);
+
+    /**
+     * Opaque pointer to private per drawable direct rendering data.
+     * \c NULL if direct rendering is not supported on the display or
+     * screen used to create this drawable.  Never dereferenced in libGL.
+     */
+    void *private;
+
+    /**
+     * Get the number of completed swap buffers for this drawable.
+     *
+     * \since Internal API version 20030317.
+     */
+    int (*getSBC)(__DRInativeDisplay *dpy, void *drawablePrivate, int64_t *sbc );
+
+    /**
+     * Wait for the SBC to be greater than or equal target_sbc.
+     *
+     * \since Internal API version 20030317.
+     */
+    int (*waitForSBC)( __DRInativeDisplay * dpy, void *drawablePriv,
+		       int64_t target_sbc,
+		       int64_t * msc, int64_t * sbc );
+
+    /**
+     * Wait for the MSC to equal target_msc, or, if that has already passed,
+     * the next time (MSC % divisor) is equal to remainder.  If divisor is
+     * zero, the function will return as soon as MSC is greater than or equal
+     * to target_msc.
+     * 
+     * \since Internal API version 20030317.
+     */
+    int (*waitForMSC)( __DRInativeDisplay * dpy, void *drawablePriv,
+		       int64_t target_msc, int64_t divisor, int64_t remainder,
+		       int64_t * msc, int64_t * sbc );
+
+    /**
+     * Like \c swapBuffers, but does NOT have an implicit \c glFlush.  Once
+     * rendering is complete, waits until MSC is equal to target_msc, or
+     * if that has already passed, waits until (MSC % divisor) is equal
+     * to remainder.  If divisor is zero, the swap will happen as soon as
+     * MSC is greater than or equal to target_msc.
+     * 
+     * \since Internal API version 20030317.
+     */
+    int64_t (*swapBuffersMSC)(__DRInativeDisplay *dpy, void *drawablePrivate,
+			      int64_t target_msc,
+			      int64_t divisor, int64_t remainder);
+
+    /**
+     * Enable or disable frame usage tracking.
+     * 
+     * \since Internal API version 20030317.
+     */
+    int (*frameTracking)(__DRInativeDisplay *dpy, void *drawablePrivate, GLboolean enable);
+
+    /**
+     * Retrieve frame usage information.
+     * 
+     * \since Internal API version 20030317.
+     */
+    int (*queryFrameTracking)(__DRInativeDisplay *dpy, void *drawablePrivate,
+			      int64_t * sbc, int64_t * missedFrames,
+			      float * lastMissedUsage, float * usage );
+
+    /**
+     * Used by drivers that implement the GLX_SGI_swap_control or
+     * GLX_MESA_swap_control extension.
+     *
+     * \since Internal API version 20030317.
+     */
+    unsigned swap_interval;
+};
+
+#endif