dri_glx.c

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

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

Copyright 1998-1999 Precision Insight, Inc., Cedar Park, Texas.
All Rights Reserved.

Permission is hereby granted, free of charge, to any person obtaining a
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"Software"), to deal in the Software without restriction, including
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The above copyright notice and this permission notice (including the
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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 PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR
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**************************************************************************/

/*
 * Authors:
 *   Kevin E. Martin <[e-mail]>
 *   Brian Paul <[e-mail]>
 *
 */

#ifdef GLX_DIRECT_RENDERING

#include <X11/Xlib.h>
#include <X11/extensions/Xfixes.h>
#include <X11/extensions/Xdamage.h>
#include "glheader.h"
#include "glxclient.h"
#include "glcontextmodes.h"
#include "xf86dri.h"
#include "sarea.h"
#include <dlfcn.h>
#include <sys/types.h>
#include <sys/mman.h>
#include "xf86drm.h"
#include "dri_common.h"

typedef struct __GLXDRIdisplayPrivateRec __GLXDRIdisplayPrivate;
typedef struct __GLXDRIcontextPrivateRec __GLXDRIcontextPrivate;

struct __GLXDRIdisplayPrivateRec {
    __GLXDRIdisplay base;

    /*
    ** XFree86-DRI version information
    */
    int driMajor;
    int driMinor;
    int driPatch;
};

struct __GLXDRIcontextPrivateRec {
    __GLXDRIcontext base;
    __DRIcontext *driContext;
    XID hwContextID;
    __GLXscreenConfigs *psc;
};

/*
 * Given a display pointer and screen number, determine the name of
 * the DRI driver for the screen. (I.e. "r128", "tdfx", etc).
 * Return True for success, False for failure.
 */
static Bool driGetDriverName(Display *dpy, int scrNum, char **driverName)
{
   int directCapable;
   Bool b;
   int driverMajor, driverMinor, driverPatch;

   *driverName = NULL;

   if (!XF86DRIQueryDirectRenderingCapable(dpy, scrNum, &directCapable)) {
      ErrorMessageF("XF86DRIQueryDirectRenderingCapable failed\n");
      return False;
   }
   if (!directCapable) {
      ErrorMessageF("XF86DRIQueryDirectRenderingCapable returned false\n");
      return False;
   }

   b = XF86DRIGetClientDriverName(dpy, scrNum, &driverMajor, &driverMinor,
                                  &driverPatch, driverName);
   if (!b) {
      ErrorMessageF("Cannot determine driver name for screen %d\n", scrNum);
      return False;
   }

   InfoMessageF("XF86DRIGetClientDriverName: %d.%d.%d %s (screen %d)\n",
	     driverMajor, driverMinor, driverPatch, *driverName, scrNum);

   return True;
}

/*
 * Exported function for querying the DRI driver for a given screen.
 *
 * The returned char pointer points to a static array that will be
 * overwritten by subsequent calls.
 */
PUBLIC const char *glXGetScreenDriver (Display *dpy, int scrNum) {
   static char ret[32];
   char *driverName;
   if (driGetDriverName(dpy, scrNum, &driverName)) {
      int len;
      if (!driverName)
	 return NULL;
      len = strlen (driverName);
      if (len >= 31)
	 return NULL;
      memcpy (ret, driverName, len+1);
      Xfree(driverName);
      return ret;
   }
   return NULL;
}

/*
 * Exported function for obtaining a driver's option list (UTF-8 encoded XML).
 *
 * The returned char pointer points directly into the driver. Therefore
 * it should be treated as a constant.
 *
 * If the driver was not found or does not support configuration NULL is
 * returned.
 *
 * Note: The driver remains opened after this function returns.
 */
PUBLIC const char *glXGetDriverConfig (const char *driverName)
{
   void *handle = driOpenDriver (driverName);
   if (handle)
      return dlsym (handle, "__driConfigOptions");
   else
      return NULL;
}

#ifdef XDAMAGE_1_1_INTERFACE

static GLboolean has_damage_post(Display *dpy)
{
    static GLboolean inited = GL_FALSE;
    static GLboolean has_damage;

    if (!inited) {
	int major, minor;

	if (XDamageQueryVersion(dpy, &major, &minor) &&
	    major == 1 && minor >= 1)
	{
	    has_damage = GL_TRUE;
	} else {
	    has_damage = GL_FALSE;
	}
	inited = GL_TRUE;
    }

    return has_damage;
}

static void __glXReportDamage(__DRIdrawable *driDraw,
			      int x, int y,
			      drm_clip_rect_t *rects, int num_rects,
			      GLboolean front_buffer,
			      void *loaderPrivate)
{
    XRectangle *xrects;
    XserverRegion region;
    int i;
    int x_off, y_off;
    __GLXDRIdrawable *glxDraw = loaderPrivate;
    __GLXscreenConfigs *psc = glxDraw->psc;
    Display *dpy = psc->dpy;
    Drawable drawable;

    if (!has_damage_post(dpy))
	return;

    if (front_buffer) {
	x_off = x;
	y_off = y;
	drawable = RootWindow(dpy, psc->scr);
    } else{
	x_off = 0;
	y_off = 0;
	drawable = glxDraw->xDrawable;
    }

    xrects = malloc(sizeof(XRectangle) * num_rects);
    if (xrects == NULL)
	return;

    for (i = 0; i < num_rects; i++) {
	xrects[i].x = rects[i].x1 + x_off;
	xrects[i].y = rects[i].y1 + y_off;
	xrects[i].width = rects[i].x2 - rects[i].x1;
	xrects[i].height = rects[i].y2 - rects[i].y1;
    }
    region = XFixesCreateRegion(dpy, xrects, num_rects);
    free(xrects);
    XDamageAdd(dpy, drawable, region);
    XFixesDestroyRegion(dpy, region);
}

static const __DRIdamageExtension damageExtension = {
    { __DRI_DAMAGE, __DRI_DAMAGE_VERSION },
    __glXReportDamage,
};

#endif

static GLboolean
__glXDRIGetDrawableInfo(__DRIdrawable *drawable,
			unsigned int *index, unsigned int *stamp, 
			int *X, int *Y, int *W, int *H,
			int *numClipRects, drm_clip_rect_t ** pClipRects,
			int *backX, int *backY,
			int *numBackClipRects, drm_clip_rect_t **pBackClipRects,
			void *loaderPrivate)
{
    __GLXDRIdrawable *glxDraw = loaderPrivate;
    __GLXscreenConfigs *psc = glxDraw->psc;
    Display *dpy = psc->dpy;

    return XF86DRIGetDrawableInfo(dpy, psc->scr, glxDraw->drawable,
				  index, stamp, X, Y, W, H,
				  numClipRects, pClipRects,
				  backX, backY,
				  numBackClipRects, pBackClipRects);
}

static const __DRIgetDrawableInfoExtension getDrawableInfoExtension = {
    { __DRI_GET_DRAWABLE_INFO, __DRI_GET_DRAWABLE_INFO_VERSION },
    __glXDRIGetDrawableInfo
};

static const __DRIextension *loader_extensions[] = {
    &systemTimeExtension.base,
    &getDrawableInfoExtension.base,
#ifdef XDAMAGE_1_1_INTERFACE
    &damageExtension.base,
#endif
    NULL
};

#ifndef GLX_USE_APPLEGL

/**
 * Perform the required libGL-side initialization and call the client-side
 * driver's \c __driCreateNewScreen function.
 * 
 * \param dpy    Display pointer.
 * \param scrn   Screen number on the display.
 * \param psc    DRI screen information.
 * \param driDpy DRI display information.
 * \param createNewScreen  Pointer to the client-side driver's
 *               \c __driCreateNewScreen function.
 * \returns A pointer to the \c __DRIscreenPrivate structure returned by
 *          the client-side driver on success, or \c NULL on failure.
 */
static void *
CallCreateNewScreen(Display *dpy, int scrn, __GLXscreenConfigs *psc,
		    __GLXDRIdisplayPrivate * driDpy)
{
    void *psp = NULL;
    drm_handle_t hSAREA;
    drmAddress pSAREA = MAP_FAILED;
    char *BusID;
    __DRIversion   ddx_version;
    __DRIversion   dri_version;
    __DRIversion   drm_version;
    __DRIframebuffer  framebuffer;
    int   fd = -1;
    int   status;

    drm_magic_t magic;
    drmVersionPtr version;
    int newlyopened;
    char *driverName;
    drm_handle_t  hFB;
    int        junk;
    const __DRIconfig **driver_configs;

    /* DRI protocol version. */
    dri_version.major = driDpy->driMajor;
    dri_version.minor = driDpy->driMinor;
    dri_version.patch = driDpy->driPatch;

    framebuffer.base = MAP_FAILED;
    framebuffer.dev_priv = NULL;

    if (!XF86DRIOpenConnection(dpy, scrn, &hSAREA, &BusID)) {
	ErrorMessageF("XF86DRIOpenConnection failed\n");
	goto handle_error;
    }

    fd = drmOpenOnce(NULL, BusID, &newlyopened);

    Xfree(BusID); /* No longer needed */

    if (fd < 0) {
	ErrorMessageF("drmOpenOnce failed (%s)\n", strerror(-fd));
	goto handle_error;
    }

    if (drmGetMagic(fd, &magic)) {
	ErrorMessageF("drmGetMagic failed\n");
	goto handle_error;
    }

    version = drmGetVersion(fd);
    if (version) {
	drm_version.major = version->version_major;
	drm_version.minor = version->version_minor;
	drm_version.patch = version->version_patchlevel;
	drmFreeVersion(version);
    }
    else {
	drm_version.major = -1;
	drm_version.minor = -1;
	drm_version.patch = -1;
    }

    if (newlyopened && !XF86DRIAuthConnection(dpy, scrn, magic)) {
	ErrorMessageF("XF86DRIAuthConnection failed\n");
	goto handle_error;
    }

    /* Get device name (like "tdfx") and the ddx version numbers.
     * We'll check the version in each DRI driver's "createNewScreen"
     * function. */
    if (!XF86DRIGetClientDriverName(dpy, scrn,
				    &ddx_version.major,