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...

4 files changed, 18 insertions, 35 deletions

diff --git a/src/mesa/drivers/dri/r300/radeon_context.c b/src/mesa/drivers/dri/r300/radeon_context.c
index 8c712dc203..97507617cd 100644
--- a/src/mesa/drivers/dri/r300/radeon_context.c
+++ b/src/mesa/drivers/dri/r300/radeon_context.c
@@ -124,12 +124,6 @@ static void radeonInitDriverFuncs(struct dd_function_table *functions)
 }
 
 
-static int get_ust_nop(int64_t * ust)
-{
-	*ust = 1;
-	return 0;
-}
-
 /**
  * Create and initialize all common fields of the context,
  * including the Mesa context itself.
@@ -195,13 +189,7 @@ GLboolean radeonInitContext(radeonContextPtr radeon,
 	radeon->vblank_flags = (radeon->radeonScreen->irq != 0)
 	    ? driGetDefaultVBlankFlags(&radeon->optionCache) : VBLANK_FLAG_NO_IRQ;
 
-	radeon->get_ust =
-	    (PFNGLXGETUSTPROC) glXGetProcAddress((const GLubyte *)
-						 "__glXGetUST");
-	if (radeon->get_ust == NULL) {
-		radeon->get_ust = get_ust_nop;
-	}
-	(*radeon->get_ust) (&radeon->swap_ust);
+	(*dri_interface->getUST) (&radeon->swap_ust);
 
 	return GL_TRUE;
 }
diff --git a/src/mesa/drivers/dri/r300/radeon_context.h b/src/mesa/drivers/dri/r300/radeon_context.h
index 84fcaee718..189bc6ad02 100644
--- a/src/mesa/drivers/dri/r300/radeon_context.h
+++ b/src/mesa/drivers/dri/r300/radeon_context.h
@@ -196,7 +196,6 @@ struct radeon_context {
 	GLuint swap_count;
 	GLuint swap_missed_count;
 
-	PFNGLXGETUSTPROC get_ust;
 
 	/* Derived state */
 	struct radeon_state state;
diff --git a/src/mesa/drivers/dri/r300/radeon_ioctl.c b/src/mesa/drivers/dri/r300/radeon_ioctl.c
index 1f2f71c29a..af489e2a84 100644
--- a/src/mesa/drivers/dri/r300/radeon_ioctl.c
+++ b/src/mesa/drivers/dri/r300/radeon_ioctl.c
@@ -208,7 +208,7 @@ void radeonCopyBuffer(const __DRIdrawablePrivate * dPriv)
 		((r300ContextPtr)radeon)->hw.all_dirty = GL_TRUE;
 
 	radeon->swap_count++;
-	(*radeon->get_ust) (&ust);
+	(*dri_interface->getUST) (&ust);
 	if (missed_target) {
 		radeon->swap_missed_count++;
 		radeon->swap_missed_ust = ust - radeon->swap_ust;
@@ -266,7 +266,7 @@ void radeonPageFlip(const __DRIdrawablePrivate * dPriv)
 			 &missed_target);
 	if (missed_target) {
 		radeon->swap_missed_count++;
-		(void)(*radeon->get_ust) (&radeon->swap_missed_ust);
+		(void)(*dri_interface->getUST) (&radeon->swap_missed_ust);
 	}
 	LOCK_HARDWARE(radeon);
 
@@ -280,7 +280,7 @@ void radeonPageFlip(const __DRIdrawablePrivate * dPriv)
 	}
 
 	radeon->swap_count++;
-	(void)(*radeon->get_ust) (&radeon->swap_ust);
+	(void)(*dri_interface->getUST) (&radeon->swap_ust);
 
 	if (radeon->sarea->pfCurrentPage == 1) {
 		radeon->state.color.drawOffset = radeon->radeonScreen->frontOffset;
diff --git a/src/mesa/drivers/dri/r300/radeon_screen.c b/src/mesa/drivers/dri/r300/radeon_screen.c
index ea9b9ea266..34f5d84e36 100644
--- a/src/mesa/drivers/dri/r300/radeon_screen.c
+++ b/src/mesa/drivers/dri/r300/radeon_screen.c
@@ -216,7 +216,6 @@ static const struct dri_debug_control debug_control[] = {
 #define PCI_CHIP_R420_JK                0x4a4b
 #endif
 
-static PFNGLXCREATECONTEXTMODES create_context_modes = NULL;
 
 static radeonScreenPtr __radeonScreen;
 
@@ -271,7 +270,7 @@ static __GLcontextModes *radeonFillInModes(unsigned pixel_bits,
 		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,
@@ -312,7 +311,7 @@ static radeonScreenPtr radeonCreateScreen(__DRIscreenPrivate * sPriv)
 	unsigned char *RADEONMMIO;
 	PFNGLXSCRENABLEEXTENSIONPROC glx_enable_extension =
 	  (PFNGLXSCRENABLEEXTENSIONPROC)
-	      glXGetProcAddress((const GLubyte *) "__glXScrEnableExtension");
+	      (*dri_interface->getProcAddress("glxEnableExtension"));
 	void *const psc = sPriv->psc->screenConfigs;
 
 
@@ -790,13 +789,14 @@ static const struct __DriverAPIRec radeonAPI = {
  * \return A pointer to a \c __DRIscreenPrivate on success, or \c NULL on
  *         failure.
  */
-void *__driCreateNewScreen_20050722(__DRInativeDisplay * dpy, int scrn,
+void *__driCreateNewScreen_20050725(__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,
+			   const __DRIinterfaceMethods * interface,
 			   __GLcontextModes ** driver_modes)
 {
 	__DRIscreenPrivate *psp;
@@ -804,6 +804,8 @@ void *__driCreateNewScreen_20050722(__DRInativeDisplay * dpy, int scrn,
 	static const __DRIversion dri_expected = { 4, 0, 0 };
 	static const __DRIversion drm_expected = { 1, 11, 1 };
 
+	dri_interface = interface;
+
 	if (!driCheckDriDdxDrmVersions3("R300",
 					dri_version, &dri_expected,
 					ddx_version, &ddx_expected,
@@ -816,20 +818,14 @@ void *__driCreateNewScreen_20050722(__DRInativeDisplay * dpy, int scrn,
 				       frame_buffer, pSAREA, fd,
 				       internal_api_version, &radeonAPI);
 	if (psp != NULL) {
-		create_context_modes = (PFNGLXCREATECONTEXTMODES)
-		    glXGetProcAddress((const GLubyte *)
-				      "__glXCreateContextModes");
-		if (create_context_modes != NULL) {
-			RADEONDRIPtr dri_priv = (RADEONDRIPtr) psp->pDevPriv;
-			*driver_modes = radeonFillInModes(dri_priv->bpp,
-							(dri_priv->bpp ==
-							 16) ? 16 : 24,
-							(dri_priv->bpp ==
-							 16) ? 0 : 8,
-							(dri_priv->backOffset !=
-							 dri_priv->
-							 depthOffset));
-		}
+		RADEONDRIPtr dri_priv = (RADEONDRIPtr) psp->pDevPriv;
+		*driver_modes = radeonFillInModes(dri_priv->bpp,
+						  (dri_priv->bpp ==
+						   16) ? 16 : 24,
+						  (dri_priv->bpp ==
+						   16) ? 0 : 8,
+						  (dri_priv->backOffset !=
+						   dri_priv->depthOffset));
 	}
 
 	return (void *)psp;