st/dri2: Use event-driven buffer validation.

3 files changed, 27 insertions, 4 deletions

diff --git a/src/gallium/state_trackers/dri/dri_context.c b/src/gallium/state_trackers/dri/dri_context.c
index 5033c3c85b8..908cef454e9 100644
--- a/src/gallium/state_trackers/dri/dri_context.c
+++ b/src/gallium/state_trackers/dri/dri_context.c
@@ -166,10 +166,8 @@ dri_make_current(__DRIcontext * cPriv,
       if (__dri1_api_hooks) {
 	 dri1_update_drawables(ctx, draw, read);
       } else {
-	 if (driDrawPriv)
-	    dri_get_buffers(driDrawPriv);
-	 if (driDrawPriv != driReadPriv && driReadPriv)
-	    dri_get_buffers(driReadPriv);
+	 dri_update_buffer(ctx->pipe->screen,
+			   ctx->pipe->priv);
       }
    } else {
       st_make_current(NULL, NULL, NULL);
diff --git a/src/gallium/state_trackers/dri/dri_drawable.c b/src/gallium/state_trackers/dri/dri_drawable.c
index 97277c05072..4d7596a831a 100644
--- a/src/gallium/state_trackers/dri/dri_drawable.c
+++ b/src/gallium/state_trackers/dri/dri_drawable.c
@@ -284,7 +284,20 @@ dri_update_buffer(struct pipe_screen *screen, void *context_private)
 {
    struct dri_context *ctx = (struct dri_context *)context_private;
 
+   if (ctx->d_stamp == *ctx->dPriv->pStamp &&
+       ctx->r_stamp == *ctx->rPriv->pStamp)
+      return;
+
+   ctx->d_stamp = *ctx->dPriv->pStamp;
+   ctx->r_stamp = *ctx->rPriv->pStamp;
+
+   st_flush(ctx->st, PIPE_FLUSH_RENDER_CACHE, NULL);
+
+   /* Ask the X server for new renderbuffers. */
    dri_get_buffers(ctx->dPriv);
+   if (ctx->dPriv != ctx->rPriv)
+      dri_get_buffers(ctx->rPriv);
+
 }
 
 void
diff --git a/src/gallium/state_trackers/dri/dri_screen.c b/src/gallium/state_trackers/dri/dri_screen.c
index b36ea43db5f..77d640227fb 100644
--- a/src/gallium/state_trackers/dri/dri_screen.c
+++ b/src/gallium/state_trackers/dri/dri_screen.c
@@ -61,6 +61,17 @@ static const __DRItexBufferExtension dri2TexBufferExtension = {
    dri2_set_tex_buffer2,
 };
 
+static void
+dri2_flush_drawable(__DRIdrawable *draw)
+{
+}
+
+static const __DRI2flushExtension dri2FlushExtension = {
+    { __DRI2_FLUSH, __DRI2_FLUSH_VERSION },
+    dri2_flush_drawable,
+    dri2InvalidateDrawable,
+};
+
    static const __DRIextension *dri_screen_extensions[] = {
       &driReadDrawableExtension,
       &driCopySubBufferExtension.base,
@@ -68,6 +79,7 @@ static const __DRItexBufferExtension dri2TexBufferExtension = {
       &driFrameTrackingExtension.base,
       &driMediaStreamCounterExtension.base,
       &dri2TexBufferExtension.base,
+      &dri2FlushExtension.base,
       NULL
    };