1 files changed, 112 insertions, 105 deletions

diff --git a/src/egl/main/egldriver.c b/src/egl/main/egldriver.c
index bda06dd827..32842933ce 100644
--- a/src/egl/main/egldriver.c
+++ b/src/egl/main/egldriver.c
@@ -1,82 +1,161 @@
+/**
+ * Functions for choosing and opening/loading device drivers.
+ */
+
+
 #include <assert.h>
+#include <string.h>
 #include <dlfcn.h>
 #include <stdio.h>
-#include <string.h>
+#include <stdlib.h>
 #include "eglconfig.h"
 #include "eglcontext.h"
+#include "egldefines.h"
 #include "egldisplay.h"
 #include "egldriver.h"
 #include "eglglobals.h"
 #include "egllog.h"
+#include "eglmisc.h"
 #include "eglmode.h"
 #include "eglscreen.h"
+#include "eglstring.h"
 #include "eglsurface.h"
 
+#if defined(_EGL_PLATFORM_X)
+#include "eglx.h"
+#elif defined(_EGL_PLATFORM_WINDOWS)
+/* XXX to do */
+#elif defined(_EGL_PLATFORM_WINCE)
+/* XXX to do */
+#endif
+
+
+const char *DefaultDriverName = ":0";
+const char *SysFS = "/sys/class";
+
+
+
+
+/**
+ * Given a card number, use sysfs to determine the DRI driver name.
+ */
+static const char *
+_eglChooseDRMDriver(int card)
+{
+#if 0
+   return _eglstrdup("libEGLdri");
+#else
+   char path[2000], driverName[2000];
+   FILE *f;
+   int length;
+
+   snprintf(path, sizeof(path), "%s/drm/card%d/dri_library_name", SysFS, card);
 
-const char *DefaultDriverName = "demodriver";
+   f = fopen(path, "r");
+   if (!f)
+      return NULL;
+
+   fgets(driverName, sizeof(driverName), f);
+   fclose(f);
+
+   if ((length = strlen(driverName)) > 1) {
+      /* remove the trailing newline from sysfs */
+      driverName[length - 1] = '\0';
+      strncat(driverName, "_dri", sizeof(driverName));
+      return _eglstrdup(driverName);
+   }
+   else {
+      return NULL;
+   }   
+#endif
+}
 
 
 /**
- * Choose and open/init the hardware driver for the given EGLDisplay.
- * Previously, the EGLDisplay was created with _eglNewDisplay() where
- * we recorded the user's NativeDisplayType parameter.
+ * Determine/return the name of the driver to use for the given _EGLDisplay.
  *
- * Now we'll use the NativeDisplayType value.
+ * Try to be clever and determine if nativeDisplay is an Xlib Display
+ * ptr or a string (naming a driver or screen number, etc).
  *
- * Currently, the native display value is treated as a string.
  * If the first character is ':' we interpret it as a screen or card index
  * number (i.e. ":0" or ":1", etc)
  * Else if the first character is '!' we interpret it as specific driver name
  * (i.e. "!r200" or "!i830".
+ *
+ * Whatever follows ':' is copied and put into dpy->DriverArgs.
+ *
+ * The caller may free() the returned string.
  */
-_EGLDriver *
-_eglChooseDriver(EGLDisplay display)
+const char *
+_eglChooseDriver(_EGLDisplay *dpy)
 {
-   _EGLDisplay *dpy = _eglLookupDisplay(display);
-   _EGLDriver *drv;
-   const char *driverName = DefaultDriverName;
-   const char *name;
+   const char *displayString = (const char *) dpy->NativeDisplay;
+   const char *driverName = NULL;
 
-   assert(dpy);
+   if (!displayString) {
+      /* choose a default */
+      displayString = DefaultDriverName;
+   }
 
-   name = dpy->Name;
-   if (!name) {
-      /* use default */
+   /* extract default DriverArgs = whatever follows ':' */
+   if (displayString[0] == '!' ||
+       displayString[0] == ':') {
+      const char *args = strchr(displayString, ':');
+      if (args)
+         dpy->DriverArgs = _eglstrdup(args + 1);
    }
-   else if (name[0] == ':' && (name[1] >= '0' && name[1] <= '9') && !name[2]) {
-      /* XXX probe hardware here to determine which driver to open */
-      driverName = "libEGLdri";
+
+   /* determine driver name now */
+   if (displayString && displayString[0] == ':' &&
+       (displayString[1] >= '0' && displayString[1] <= '9') &&
+       !displayString[2]) {
+      int card = atoi(displayString + 1);
+      driverName = _eglChooseDRMDriver(card);
    }
-   else if (name[0] == '!') {
-      /* use specified driver name */
-      driverName = name + 1;
+   else if (displayString && displayString[0] == '!') {
+      /* use user-specified driver name */
+      driverName = _eglstrdup(displayString + 1);
+      /* truncate driverName at ':' if present */
+      {
+         char *args = strchr(driverName, ':');
+         if (args) {
+            *args = 0;
+         }
+      }
    }
    else {
-      /* Maybe display was returned by XOpenDisplay? */
-      _eglLog(_EGL_FATAL, "eglChooseDriver() bad name");
+      /* NativeDisplay is not a string! */
+#if defined(_EGL_PLATFORM_X)
+      driverName = _xeglChooseDriver(dpy);
+#elif defined(_EGL_PLATFORM_WINDOWS)
+      /* XXX to do */
+      driverName = _weglChooseDriver(dpy);
+#elif defined(_EGL_PLATFORM_WINCE)
+      /* XXX to do */
+#endif
    }
 
-   _eglLog(_EGL_INFO, "eglChooseDriver() choosing %s", driverName);
-
-   drv = _eglOpenDriver(dpy, driverName);
-   dpy->Driver = drv;
-
-   return drv;
+   return driverName;
 }
 
 
 /**
  * Open/load the named driver and call its bootstrap function: _eglMain().
+ * By the time this function is called, the dpy->DriverName should have
+ * been determined.
+ *
  * \return  new _EGLDriver object.
  */
 _EGLDriver *
-_eglOpenDriver(_EGLDisplay *dpy, const char *driverName)
+_eglOpenDriver(_EGLDisplay *dpy, const char *driverName, const char *args)
 {
    _EGLDriver *drv;
    _EGLMain_t mainFunc;
    void *lib;
    char driverFilename[1000];
 
+   assert(driverName);
+
    /* XXX also prepend a directory path??? */
    sprintf(driverFilename, "%s.so", driverName);
 
@@ -95,7 +174,7 @@ _eglOpenDriver(_EGLDisplay *dpy, const char *driverName)
       return NULL;
    }
 
-   drv = mainFunc(dpy);
+   drv = mainFunc(dpy, args);
    if (!drv) {
       dlclose(lib);
       return NULL;
@@ -106,7 +185,6 @@ _eglOpenDriver(_EGLDisplay *dpy, const char *driverName)
    else
       dlclose(lib);
 
-   drv->Display = dpy;
    return drv;
 }
 
@@ -199,74 +277,3 @@ _eglInitDriverFallbacks(_EGLDriver *drv)
    drv->API.CreatePbufferFromClientBuffer = _eglCreatePbufferFromClientBuffer;
 #endif /* EGL_VERSION_1_2 */
 }
-
-
-/**
- * Examine the individual extension enable/disable flags and recompute
- * the driver's Extensions string.
- */
-static void
-_eglUpdateExtensionsString(_EGLDriver *drv)
-{
-   drv->Extensions.String[0] = 0;
-
-   if (drv->Extensions.MESA_screen_surface)
-      strcat(drv->Extensions.String, "EGL_MESA_screen_surface ");
-   if (drv->Extensions.MESA_copy_context)
-      strcat(drv->Extensions.String, "EGL_MESA_copy_context ");
-   assert(strlen(drv->Extensions.String) < MAX_EXTENSIONS_LEN);
-}
-
-
-
-const char *
-_eglQueryString(_EGLDriver *drv, EGLDisplay dpy, EGLint name)
-{
-   (void) drv;
-   (void) dpy;
-   switch (name) {
-   case EGL_VENDOR:
-      return "Mesa Project";
-   case EGL_VERSION:
-      return "1.0";
-   case EGL_EXTENSIONS:
-      _eglUpdateExtensionsString(drv);
-      return drv->Extensions.String;
-#ifdef EGL_VERSION_1_2
-   case EGL_CLIENT_APIS:
-      /* XXX need to initialize somewhere */
-      return drv->ClientAPIs;
-#endif
-   default:
-      _eglError(EGL_BAD_PARAMETER, "eglQueryString");
-      return NULL;
-   }
-}
-
-
-EGLBoolean
-_eglWaitGL(_EGLDriver *drv, EGLDisplay dpy)
-{
-   /* just a placeholder */
-   (void) drv;
-   (void) dpy;
-   return EGL_TRUE;
-}
-
-
-EGLBoolean
-_eglWaitNative(_EGLDriver *drv, EGLDisplay dpy, EGLint engine)
-{
-   /* just a placeholder */
-   (void) drv;
-   (void) dpy;
-   switch (engine) {
-   case EGL_CORE_NATIVE_ENGINE:
-      break;
-   default:
-      _eglError(EGL_BAD_PARAMETER, "eglWaitNative(engine)");
-      return EGL_FALSE;
-   }
-
-   return EGL_TRUE;
-}