i915tex: Triple buffering support, only effective with page flipping so far.

Pending flips are tracked per renderbuffer and the colour renderbuffer
attachments of window framebuffer objects are rotated on flips to avoid
stalling the pipeline for pending flips unnecessarily.

1 files changed, 57 insertions, 8 deletions

diff --git a/src/mesa/drivers/dri/i915tex/intel_screen.c b/src/mesa/drivers/dri/i915tex/intel_screen.c
index f26b3f33ad..4763d14f4f 100644
--- a/src/mesa/drivers/dri/i915tex/intel_screen.c
+++ b/src/mesa/drivers/dri/i915tex/intel_screen.c
@@ -98,6 +98,18 @@ intelMapScreenRegions(__DRIscreenPrivate * sPriv)
       return GL_FALSE;
    }
 
+   if (intelScreen->third.handle) {
+      if (0)
+	 _mesa_printf("Third 0x%08x ", intelScreen->third.handle);
+      if (drmMap(sPriv->fd,
+		 intelScreen->third.handle,
+		 intelScreen->third.size,
+		 (drmAddress *) & intelScreen->third.map) != 0) {
+	 intelUnmapScreenRegions(intelScreen);
+	 return GL_FALSE;
+      }
+   }
+
    if (0)
       _mesa_printf("Depth 0x%08x ", intelScreen->depth.handle);
    if (drmMap(sPriv->fd,
@@ -119,9 +131,9 @@ intelMapScreenRegions(__DRIscreenPrivate * sPriv)
    }
 #endif
    if (0)
-      printf("Mappings:  front: %p  back: %p  depth: %p  tex: %p\n",
+      printf("Mappings:  front: %p  back: %p  third: %p  depth: %p  tex: %p\n",
              intelScreen->front.map,
-             intelScreen->back.map,
+             intelScreen->back.map, intelScreen->third.map,
              intelScreen->depth.map, intelScreen->tex.map);
    return GL_TRUE;
 }
@@ -191,6 +203,18 @@ intel_recreate_static_regions(intelScreenPrivate *intelScreen)
 			    intelScreen->back.pitch / intelScreen->cpp,
 			    intelScreen->height);
 
+   if (intelScreen->third.handle) {
+      intelScreen->third_region =
+	 intel_recreate_static(intelScreen,
+			       intelScreen->third_region,
+			       DRM_BO_FLAG_MEM_TT,
+			       intelScreen->third.offset,
+			       intelScreen->third.map,
+			       intelScreen->cpp,
+			       intelScreen->third.pitch / intelScreen->cpp,
+			       intelScreen->height);
+   }
+
    /* Still assuming front.cpp == depth.cpp
     */
    intelScreen->depth_region =
@@ -240,6 +264,13 @@ intelUnmapScreenRegions(intelScreenPrivate * intelScreen)
 #endif
       intelScreen->back.map = NULL;
    }
+   if (intelScreen->third.map) {
+#if REALLY_UNMAP
+      if (drmUnmap(intelScreen->third.map, intelScreen->third.size) != 0)
+         printf("drmUnmap third failed!\n");
+#endif
+      intelScreen->third.map = NULL;
+   }
    if (intelScreen->depth.map) {
 #if REALLY_UNMAP
       drmUnmap(intelScreen->depth.map, intelScreen->depth.size);
@@ -325,6 +356,13 @@ intelUpdateScreenFromSAREA(intelScreenPrivate * intelScreen,
    intelScreen->back.handle = sarea->back_handle;
    intelScreen->back.size = sarea->back_size;
 
+   if (intelScreen->driScrnPriv->ddxMinor >= 8) {
+      intelScreen->third.offset = sarea->third_offset;
+      intelScreen->third.pitch = sarea->pitch * intelScreen->cpp;
+      intelScreen->third.handle = sarea->third_handle;
+      intelScreen->third.size = sarea->third_size;
+   }
+
    intelScreen->depth.offset = sarea->depth_offset;
    intelScreen->depth.pitch = sarea->pitch * intelScreen->cpp;
    intelScreen->depth.handle = sarea->depth_handle;
@@ -550,29 +588,40 @@ intelCreateBuffer(__DRIscreenPrivate * driScrnPriv,
 
       /* setup the hardware-based renderbuffers */
       {
-         struct intel_renderbuffer *frontRb
+         intel_fb->color_rb[0]
             = intel_create_renderbuffer(rgbFormat,
                                         screen->width, screen->height,
                                         screen->front.offset,
                                         screen->front.pitch,
                                         screen->cpp,
                                         screen->front.map);
-         intel_set_span_functions(&frontRb->Base);
+         intel_set_span_functions(&intel_fb->color_rb[0]->Base);
          _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_FRONT_LEFT,
-				&frontRb->Base);
+				&intel_fb->color_rb[0]->Base);
       }
 
       if (mesaVis->doubleBufferMode) {
-         struct intel_renderbuffer *backRb
+         intel_fb->color_rb[1]
             = intel_create_renderbuffer(rgbFormat,
                                         screen->width, screen->height,
                                         screen->back.offset,
                                         screen->back.pitch,
                                         screen->cpp,
                                         screen->back.map);
-         intel_set_span_functions(&backRb->Base);
+         intel_set_span_functions(&intel_fb->color_rb[1]->Base);
          _mesa_add_renderbuffer(&intel_fb->Base, BUFFER_BACK_LEFT,
-				&backRb->Base);
+				&intel_fb->color_rb[1]->Base);
+
+	 if (screen->third.handle) {
+	    intel_fb->color_rb[2]
+	       = intel_create_renderbuffer(rgbFormat,
+					   screen->width, screen->height,
+					   screen->third.offset,
+					   screen->third.pitch,
+					   screen->cpp,
+					   screen->third.map);
+	    intel_set_span_functions(&intel_fb->color_rb[2]->Base);
+	 }
       }
 
       if (mesaVis->depthBits == 24 && mesaVis->stencilBits == 8) {