Fixes the glXGetProcAddress portion of the interface. Most of the functions

that are currently obtained via glXGetProcAddress and all of the XF86DRI
functions are replaced with a funciton table.  This table will be passed to
__driCreateNewScreen.

One of the functions in the table is getProcAddress.  This allows some
loaders to expose functionality not in all loaders.  This will be immediatly
used for glxEnableExtension (formerly known to drivers as
__glXScrEnableExtension).  libGL (and in the future libglx) expose this
function so that drivers can enable GLX extensions.  libEGL should exposed
eglEnableExtension to enable EGL extensions.  The same function cannot be
used for both because the extensions have different names and (possibly)
different semantics.  Drivers can optionally use one, both, or neither.

The key parts are in the __DRIinterfaceMethodsRec structure in
dri_interface.h.  A pointer to one of these structures is passed into
__driCreateNewScreen.  Because of this, the version of the API is bumped to
20050725.  Since the previous version(s) were never in a release, their
existance is erased.

I was actually a little surprised by how much code this cuts from the
drivers.  A lot of glXGetProcAddress calls disappear, and a lot of
version checks go with them.  Nice.

The one thing I'm not sure of is removing __glXInitialize.  For some
reason that function was in the glXGetProcAddress table, but *nothing*
in the Mesa tree used it.  Did something with DRI conf. use this
function?  It seems odd...

1 files changed, 7 insertions, 9 deletions

diff --git a/src/mesa/drivers/dri/sis/sis_screen.c b/src/mesa/drivers/dri/sis/sis_screen.c
index 56585d3cdd..592852e941 100644
--- a/src/mesa/drivers/dri/sis/sis_screen.c
+++ b/src/mesa/drivers/dri/sis/sis_screen.c
@@ -59,7 +59,6 @@ DRI_CONF_BEGIN
 DRI_CONF_END;
 static const GLuint __driNConfigOptions = 2;
 
-static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
 
 static __GLcontextModes *
 sisFillInModes(int bpp)
@@ -100,7 +99,7 @@ sisFillInModes(int bpp)
       fb_type = GL_UNSIGNED_INT_8_8_8_8_REV;
    }
 
-   modes = (*create_context_modes)(num_modes, sizeof(__GLcontextModes));
+   modes = (*dri_interface->createContextModes)(num_modes, sizeof(__GLcontextModes));
    m = modes;
    if (!driFillInModes(&m, fb_format, fb_type, depth_bits_array,
 		       stencil_bits_array, depth_buffer_factor,
@@ -414,7 +413,7 @@ static struct __DriverAPIRec sisAPI = {
  *         failure.
  */
 PUBLIC
-void * __driCreateNewScreen_20050722( __DRInativeDisplay *dpy, int scrn,
+void * __driCreateNewScreen_20050725( __DRInativeDisplay *dpy, int scrn,
 			     __DRIscreen *psc,
 			     const __GLcontextModes *modes,
 			     const __DRIversion *ddx_version,
@@ -423,6 +422,7 @@ void * __driCreateNewScreen_20050722( __DRInativeDisplay *dpy, int scrn,
 			     const __DRIframebuffer *frame_buffer,
 			     drmAddress pSAREA, int fd,
 			     int internal_api_version,
+			     const __DRIinterfaceMethods * interface,
 			     __GLcontextModes **driver_modes )
 
 {
@@ -431,6 +431,8 @@ void * __driCreateNewScreen_20050722( __DRInativeDisplay *dpy, int scrn,
    static const __DRIversion dri_expected = {4, 0, 0};
    static const __DRIversion drm_expected = {1, 0, 0};
 
+   dri_interface = interface;
+
    if (!driCheckDriDdxDrmVersions2("SiS", dri_version, &dri_expected,
 				   ddx_version, &ddx_expected,
 				   drm_version, &drm_expected)) {
@@ -442,12 +444,8 @@ void * __driCreateNewScreen_20050722( __DRInativeDisplay *dpy, int scrn,
 				  frame_buffer, pSAREA, fd,
 				  internal_api_version, &sisAPI);
    if (psp != NULL) {
-      create_context_modes = (PFNGLXCREATECONTEXTMODES)
-	 glXGetProcAddress((const GLubyte *)"__glXCreateContextModes");
-      if (create_context_modes != NULL) {
-	 SISDRIPtr dri_priv = (SISDRIPtr)psp->pDevPriv;
-	 *driver_modes = sisFillInModes(dri_priv->bytesPerPixel * 8);
-      }
+      SISDRIPtr dri_priv = (SISDRIPtr)psp->pDevPriv;
+      *driver_modes = sisFillInModes(dri_priv->bytesPerPixel * 8);
    }
 
    return (void *)psp;