Remove third buffer support from Mesa.

This is part of the deprecated pageflipping infrastructure.

src/mesa/drivers/dri/intel/intel_buffers.c

@@ -181,7 +181,7 @@ intelUpdatePageFlipping(struct intel_context *intel,
    intel_fb->pf_current_page = (intel->sarea->pf_current_page >>
 				(intel_fb->pf_planes & 0x2)) & 0x3;
 
-   intel_fb->pf_num_pages = intel->intelScreen->third.handle ? 3 : 2;
+   intel_fb->pf_num_pages = 2;
 
    pf_active = pf_planes && (pf_planes & intel->sarea->pf_active) == pf_planes;
 

src/mesa/drivers/dri/intel/intel_context.c

@@ -775,7 +775,6 @@ intelDestroyContext(__DRIcontextPrivate * driContextPriv)
 
       intel_region_release(&intel->front_region);
       intel_region_release(&intel->back_region);
-      intel_region_release(&intel->third_region);
       intel_region_release(&intel->depth_region);
 
       driDestroyOptionCache(&intel->optionCache);
@@ -825,12 +824,7 @@ intelMakeCurrent(__DRIcontextPrivate * driContextPriv,
 	    intel_renderbuffer_set_region(intel_fb->color_rb[1],
 					  intel->back_region);
          }
-#if 0
-         if (intel_fb->color_rb[2]) {
-	    intel_renderbuffer_set_region(intel_fb->color_rb[2],
-					  intel->third_region);
-         }
-#endif
+
          if (irbDepth) {
 	    intel_renderbuffer_set_region(irbDepth, intel->depth_region);
          }
@@ -867,7 +861,7 @@ intelMakeCurrent(__DRIcontextPrivate * driContextPriv,
 	       driDrawableInitVBlank(driDrawPriv);
 	       intel_fb->vbl_waited = driDrawPriv->vblSeq;
 
-	       for (i = 0; i < (intel->intelScreen->third.handle ? 3 : 2); i++) {
+	       for (i = 0; i < 2; i++) {
 		  if (intel_fb->color_rb[i])
 		     intel_fb->color_rb[i]->vbl_pending = driDrawPriv->vblSeq;
 	       }

src/mesa/drivers/dri/intel/intel_context.h

@@ -166,7 +166,6 @@ struct intel_context
 
    struct intel_region *front_region;
    struct intel_region *back_region;
-   struct intel_region *third_region;
    struct intel_region *depth_region;
 
    /**

src/mesa/drivers/dri/intel/intel_regions.c

@@ -550,15 +550,6 @@ intel_recreate_static_regions(struct intel_context *intel)
 			    intel->back_region,
 			    &intelScreen->back);
 
-#ifdef I915
-   if (intelScreen->third.handle) {
-      intel->third_region =
-	 intel_recreate_static(intel, "third",
-			       intel->third_region,
-			       &intelScreen->third);
-   }
-#endif /* I915 */
-
    /* Still assumes front.cpp == depth.cpp.  We can kill this when we move to
     * private buffers.
     */

src/mesa/drivers/dri/intel/intel_screen.c

@@ -177,13 +177,6 @@ intelUpdateScreenFromSAREA(intelScreenPrivate * intelScreen,
    intelScreen->back.size = sarea->back_size;
    intelScreen->back.tiled = sarea->back_tiled;
 
-   if (intelScreen->driScrnPriv->ddx_version.minor >= 8) {
-      intelScreen->third.offset = sarea->third_offset;
-      intelScreen->third.handle = sarea->third_handle;
-      intelScreen->third.size = sarea->third_size;
-      intelScreen->third.tiled = sarea->third_tiled;
-   }
-
    intelScreen->depth.offset = sarea->depth_offset;
    intelScreen->depth.handle = sarea->depth_handle;
    intelScreen->depth.size = sarea->depth_size;
@@ -192,12 +185,10 @@ intelUpdateScreenFromSAREA(intelScreenPrivate * intelScreen,
    if (intelScreen->driScrnPriv->ddx_version.minor >= 9) {
       intelScreen->front.bo_handle = sarea->front_bo_handle;
       intelScreen->back.bo_handle = sarea->back_bo_handle;
-      intelScreen->third.bo_handle = sarea->third_bo_handle;
       intelScreen->depth.bo_handle = sarea->depth_bo_handle;
    } else {
       intelScreen->front.bo_handle = -1;
       intelScreen->back.bo_handle = -1;
-      intelScreen->third.bo_handle = -1;
       intelScreen->depth.bo_handle = -1;
    }
 
@@ -353,12 +344,6 @@ intelCreateBuffer(__DRIscreenPrivate * driScrnPriv,
          _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_BACK_LEFT,
 				&intel_fb->color_rb[1]->Base);
 
-	 if (screen->third.handle) {
-	    struct gl_renderbuffer *tmp_rb = NULL;
-
-	    intel_fb->color_rb[2] = intel_create_renderbuffer(rgbFormat);
-	    _mesa_reference_renderbuffer(&tmp_rb, &intel_fb->color_rb[2]->Base);
-	 }
       }
 
       if (mesaVis->depthBits == 24) {

src/mesa/drivers/dri/intel/intel_screen.h

@@ -56,7 +56,6 @@ typedef struct
 {
    intelRegion front;
    intelRegion back;
-   intelRegion third;
    intelRegion depth;
    intelRegion tex;