Enable GLX_SGI_make_current_read for tdfx.

Implement GLX_SGI_make_current_read for tdfx.  Remove annoying debug
printf in tdfxSwapBuffers.  Updated a comment in drirenderbuffer.h to
note that the tdfx driver uses a flag that was previously only used by
s3v.

This code was tested with glxgears, wincopy, and manywin.

1 files changed, 12 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/tdfx/tdfx_screen.c b/src/mesa/drivers/dri/tdfx/tdfx_screen.c
index 5e3d07f65b..646f5126eb 100644
--- a/src/mesa/drivers/dri/tdfx/tdfx_screen.c
+++ b/src/mesa/drivers/dri/tdfx/tdfx_screen.c
@@ -73,6 +73,9 @@ tdfxCreateScreen( __DRIscreenPrivate *sPriv )
 {
    tdfxScreenPrivate *fxScreen;
    TDFXDRIPtr fxDRIPriv = (TDFXDRIPtr) sPriv->pDevPriv;
+   PFNGLXSCRENABLEEXTENSIONPROC glx_enable_extension =
+     (PFNGLXSCRENABLEEXTENSIONPROC) (*dri_interface->getProcAddress("glxEnableExtension"));
+   void *const psc = sPriv->psc->screenConfigs;
 
    if (sPriv->devPrivSize != sizeof(TDFXDRIRec)) {
       fprintf(stderr,"\nERROR!  sizeof(TDFXDRIRec) does not match passed size from device driver\n");
@@ -113,6 +116,10 @@ tdfxCreateScreen( __DRIscreenPrivate *sPriv )
       return GL_FALSE;
    }
 
+   if (glx_enable_extension != NULL) {
+      (*glx_enable_extension)(psc, "GLX_SGI_make_current_read");
+   }
+
    return GL_TRUE;
 }
 
@@ -180,6 +187,7 @@ tdfxCreateBuffer( __DRIscreenPrivate *driScrnPriv,
                                  driDrawPriv);
          tdfxSetSpanFunctions(backRb, mesaVis);
          _mesa_add_renderbuffer(fb, BUFFER_BACK_LEFT, &backRb->Base);
+	 backRb->backBuffer = GL_TRUE;
       }
 
       if (mesaVis->depthBits == 16) {
@@ -265,7 +273,9 @@ tdfxSwapBuffers( __DRIdrawablePrivate *driDrawPriv )
             return;
 	 LOCK_HARDWARE( fxMesa );
 	 fxMesa->Glide.grSstSelect( fxMesa->Glide.Board );
+#ifdef DEBUG
          printf("SwapBuf SetState 1\n");
+#endif
 	 fxMesa->Glide.grGlideSetState(fxMesa->Glide.State );
       }
    }
@@ -325,7 +335,9 @@ tdfxSwapBuffers( __DRIdrawablePrivate *driDrawPriv )
       if (ctx->DriverCtx != fxMesa) {
          fxMesa = TDFX_CONTEXT(ctx);
 	 fxMesa->Glide.grSstSelect( fxMesa->Glide.Board );
+#ifdef DEBUG
          printf("SwapBuf SetState 2\n");
+#endif
 	 fxMesa->Glide.grGlideSetState(fxMesa->Glide.State );
       }
       UNLOCK_HARDWARE( fxMesa );