8 files changed, 43 insertions, 8 deletions
diff --git a/src/mesa/drivers/dri/common/dri_util.c b/src/mesa/drivers/dri/common/dri_util.c
index 0e01d742656..3649c296662 100644
--- a/src/mesa/drivers/dri/common/dri_util.c
+++ b/src/mesa/drivers/dri/common/dri_util.c
@@ -454,6 +454,7 @@ driCreateNewDrawable(__DRIscreen *psp, const __DRIconfig *config,
 
     pdp->driScreenPriv = psp;
     pdp->driContextPriv = &psp->dummyContextPriv;
+    pdp->validBuffers = GL_FALSE;
 
     if (!(*psp->DriverAPI.CreateBuffer)(psp, pdp, &config->modes,
 					renderType == GLX_PIXMAP_BIT)) {
diff --git a/src/mesa/drivers/dri/common/dri_util.h b/src/mesa/drivers/dri/common/dri_util.h
index 35d8b8ff932..95df702f1ae 100644
--- a/src/mesa/drivers/dri/common/dri_util.h
+++ b/src/mesa/drivers/dri/common/dri_util.h
@@ -376,6 +376,8 @@ struct __DRIdrawableRec {
      * GLX_MESA_swap_control.
      */
     unsigned int swap_interval;
+
+    GLboolean validBuffers;
 };
 
 /**
diff --git a/src/mesa/drivers/dri/intel/intel_context.c b/src/mesa/drivers/dri/intel/intel_context.c
index 13a28f0419d..3f6634c65a7 100644
--- a/src/mesa/drivers/dri/intel/intel_context.c
+++ b/src/mesa/drivers/dri/intel/intel_context.c
@@ -70,8 +70,6 @@ int INTEL_DEBUG = (0);
 #define DRIVER_DATE_GEM                 "GEM " DRIVER_DATE
 
 
-static void intel_flush(GLcontext *ctx, GLboolean needs_mi_flush);
-
 static const GLubyte *
 intelGetString(GLcontext * ctx, GLenum name)
 {
@@ -378,6 +376,7 @@ intel_update_renderbuffers(__DRIcontext *context, __DRIdrawable *drawable)
        }
    }
 
+   drawable->validBuffers = GL_TRUE;
    driUpdateFramebufferSize(&intel->ctx, drawable);
 }
 
@@ -461,7 +460,7 @@ intelInvalidateState(GLcontext * ctx, GLuint new_state)
       intel->vtbl.invalidate_state( intel, new_state );
 }
 
-static void
+void
 intel_flush(GLcontext *ctx, GLboolean needs_mi_flush)
 {
    struct intel_context *intel = intel_context(ctx);
diff --git a/src/mesa/drivers/dri/intel/intel_context.h b/src/mesa/drivers/dri/intel/intel_context.h
index c7b72358362..07207bfbec9 100644
--- a/src/mesa/drivers/dri/intel/intel_context.h
+++ b/src/mesa/drivers/dri/intel/intel_context.h
@@ -412,6 +412,7 @@ extern GLboolean intelInitContext(struct intel_context *intel,
 
 extern void intelFinish(GLcontext * ctx);
 extern void intelFlush(GLcontext * ctx);
+extern void intel_flush(GLcontext * ctx, GLboolean needs_mi_flush);
 
 extern void intelInitDriverFunctions(struct dd_function_table *functions);
 
diff --git a/src/mesa/drivers/dri/intel/intel_extensions.h b/src/mesa/drivers/dri/intel/intel_extensions.h
index 1d1c97a4a9b..e78e07356e7 100644
--- a/src/mesa/drivers/dri/intel/intel_extensions.h
+++ b/src/mesa/drivers/dri/intel/intel_extensions.h
@@ -32,5 +32,8 @@
 extern void
 intelInitExtensions(GLcontext *ctx);
 
+extern void
+intelFlushDrawable(__DRIdrawable *drawable);
+
 
 #endif
diff --git a/src/mesa/drivers/dri/intel/intel_screen.c b/src/mesa/drivers/dri/intel/intel_screen.c
index 5165716e092..e240957197d 100644
--- a/src/mesa/drivers/dri/intel/intel_screen.c
+++ b/src/mesa/drivers/dri/intel/intel_screen.c
@@ -113,10 +113,36 @@ static const __DRItexBufferExtension intelTexBufferExtension = {
    intelSetTexBuffer2,
 };
 
+static void
+intelDRI2Flush(__DRIdrawable *drawable)
+{
+   struct intel_context *intel = drawable->driContextPriv->driverPrivate;
+
+   if (intel->gen < 4)
+      INTEL_FIREVERTICES(intel);
+
+   if (intel->batch->map != intel->batch->ptr)
+      intel_batchbuffer_flush(intel->batch);
+}
+
+static void
+intelDRI2FlushInvalidate(__DRIdrawable *drawable)
+{
+   intelDRI2Flush(drawable);
+   drawable->validBuffers = GL_FALSE;
+}
+
+static const struct __DRI2flushExtensionRec intelFlushExtension = {
+    { __DRI2_FLUSH, __DRI2_FLUSH_VERSION },
+    intelDRI2Flush,
+    intelDRI2FlushInvalidate,
+};
+
 static const __DRIextension *intelScreenExtensions[] = {
     &driReadDrawableExtension,
     &intelTexOffsetExtension.base,
     &intelTexBufferExtension.base,
+    &intelFlushExtension.base,
     NULL
 };
 
@@ -311,11 +337,10 @@ __DRIconfig **intelInitScreen2(__DRIscreen *psp)
    intelScreenPrivate *intelScreen;
    GLenum fb_format[3];
    GLenum fb_type[3];
-   /* GLX_SWAP_COPY_OML is only supported because the Intel driver doesn't
-    * support pageflipping at all.
-    */
+
    static const GLenum back_buffer_modes[] = {
-      GLX_NONE, GLX_SWAP_UNDEFINED_OML, GLX_SWAP_COPY_OML
+       GLX_NONE, GLX_SWAP_UNDEFINED_OML,
+       GLX_SWAP_EXCHANGE_OML, GLX_SWAP_COPY_OML
    };
    uint8_t depth_bits[4], stencil_bits[4], msaa_samples_array[1];
    int color;
diff --git a/src/mesa/drivers/dri/intel/intel_tex_image.c b/src/mesa/drivers/dri/intel/intel_tex_image.c
index 307669f87ec..6f41eafd0ef 100644
--- a/src/mesa/drivers/dri/intel/intel_tex_image.c
+++ b/src/mesa/drivers/dri/intel/intel_tex_image.c
@@ -742,7 +742,8 @@ intelSetTexBuffer2(__DRIcontext *pDRICtx, GLint target,
    if (!intelObj)
       return;
 
-   intel_update_renderbuffers(pDRICtx, dPriv);
+   if (!dPriv->validBuffers)
+      intel_update_renderbuffers(pDRICtx, dPriv);
 
    rb = intel_get_renderbuffer(fb, BUFFER_FRONT_LEFT);
    /* If the region isn't set, then intel_update_renderbuffers was unable
diff --git a/src/mesa/drivers/x11/glxapi.c b/src/mesa/drivers/x11/glxapi.c
index 02eea25a712..a17c2c3ffc6 100644
--- a/src/mesa/drivers/x11/glxapi.c
+++ b/src/mesa/drivers/x11/glxapi.c
@@ -1173,6 +1173,9 @@ _glxapi_get_extensions(void)
 #ifdef GLX_EXT_texture_from_pixmap
       "GLX_EXT_texture_from_pixmap",
 #endif
+#ifdef GLX_INTEL_swap_event
+      "GLX_INTEL_swap_event",
+#endif
       NULL
    };
    return extensions;