Rename intel_buffers.[ch] to intel_swapbuffers.[ch]

1 files changed, 634 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/intel_winsys/intel_swapbuffers.c b/src/mesa/drivers/dri/intel_winsys/intel_swapbuffers.c
new file mode 100644
index 0000000000..56d220ab9e
--- /dev/null
+++ b/src/mesa/drivers/dri/intel_winsys/intel_swapbuffers.c
@@ -0,0 +1,634 @@
+/**************************************************************************
+ * 
+ * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ * 
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * 
+ **************************************************************************/
+
+#include "intel_screen.h"
+#include "intel_context.h"
+#include "intel_swapbuffers.h"
+#include "intel_batchbuffer.h"
+#include "intel_reg.h"
+#include "context.h"
+#include "utils.h"
+#include "drirenderbuffer.h"
+#include "vblank.h"
+
+#include "pipe/p_context.h"
+#include "state_tracker/st_cb_fbo.h"
+
+
+/* This block can be removed when libdrm >= 2.3.1 is required */
+
+#ifndef DRM_VBLANK_FLIP
+
+#define DRM_VBLANK_FLIP 0x8000000
+
+typedef struct drm_i915_flip {
+   int pipes;
+} drm_i915_flip_t;
+
+#undef DRM_IOCTL_I915_FLIP
+#define DRM_IOCTL_I915_FLIP DRM_IOW(DRM_COMMAND_BASE + DRM_I915_FLIP, \
+				    drm_i915_flip_t)
+
+#endif
+
+
+
+
+/**
+ * Copy the back color buffer to the front color buffer. 
+ * Used for SwapBuffers().
+ */
+void
+intelCopyBuffer(__DRIdrawablePrivate * dPriv,
+                const drm_clip_rect_t * rect)
+{
+
+   struct intel_context *intel;
+   const intelScreenPrivate *intelScreen;
+
+   DBG(SWAP, "%s\n", __FUNCTION__);
+
+   assert(dPriv);
+
+   intel = intelScreenContext(dPriv->driScreenPriv->private);
+   if (!intel)
+      return;
+
+   intelScreen = intel->intelScreen;
+
+   if (intel->last_swap_fence) {
+      driFenceFinish(intel->last_swap_fence, DRM_FENCE_TYPE_EXE, GL_TRUE);
+      driFenceUnReference(intel->last_swap_fence);
+      intel->last_swap_fence = NULL;
+   }
+   intel->last_swap_fence = intel->first_swap_fence;
+   intel->first_swap_fence = NULL;
+
+   /* The LOCK_HARDWARE is required for the cliprects.  Buffer offsets
+    * should work regardless.
+    */
+   LOCK_HARDWARE(intel);
+   /* if this drawable isn't currently bound the LOCK_HARDWARE done on the
+      current context (which is what intelScreenContext should return) might
+      not get a contended lock and thus cliprects not updated (tests/manywin) */
+      if ((struct intel_context *)dPriv->driContextPriv->driverPrivate != intel)
+         DRI_VALIDATE_DRAWABLE_INFO(intel->driScreen, dPriv);
+
+
+   if (dPriv && dPriv->numClipRects) {
+      struct intel_framebuffer *intel_fb = dPriv->driverPrivate;
+#if 0
+      const struct pipe_region *backRegion
+	 = intel_fb->Base._ColorDrawBufferMask[0] == BUFFER_BIT_FRONT_LEFT ?
+	   intel_get_rb_region(&intel_fb->Base, BUFFER_FRONT_LEFT) :
+	   intel_get_rb_region(&intel_fb->Base, BUFFER_BACK_LEFT);
+#endif
+      const int backWidth = intel_fb->Base.Width;
+      const int backHeight = intel_fb->Base.Height;
+      const int nbox = dPriv->numClipRects;
+      const drm_clip_rect_t *pbox = dPriv->pClipRects;
+      const int pitch = intelScreen->front.pitch / intelScreen->front.cpp;
+#if 0
+      const int srcpitch = backRegion->pitch;
+#endif
+      const int cpp = intelScreen->front.cpp;
+      int BR13, CMD;
+      int i;
+
+      const struct pipe_surface *backSurf;
+      const struct pipe_region *backRegion;
+      int srcpitch;
+      struct st_renderbuffer *strb;
+
+      /* blit from back color buffer if it exists, else front buffer */
+      strb = st_renderbuffer(intel_fb->Base.Attachment[BUFFER_BACK_LEFT].Renderbuffer);
+      if (strb) {
+         backSurf = strb->surface;
+      }
+      else {
+         strb = st_renderbuffer(intel_fb->Base.Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
+         backSurf = strb->surface;
+      }
+
+      backRegion = backSurf->region;
+      srcpitch = backRegion->pitch;
+
+      ASSERT(intel_fb);
+      ASSERT(intel_fb->Base.Name == 0);    /* Not a user-created FBO */
+      ASSERT(backRegion);
+      ASSERT(backRegion->cpp == cpp);
+
+      DBG(SWAP, "front pitch %d back pitch %d\n",
+	  pitch, backRegion->pitch);
+
+      if (cpp == 2) {
+	 BR13 = (pitch * cpp) | (0xCC << 16) | (1 << 24);
+	 CMD = XY_SRC_COPY_BLT_CMD;
+      }
+      else {
+	 BR13 = (pitch * cpp) | (0xCC << 16) | (1 << 24) | (1 << 25);
+	 CMD = (XY_SRC_COPY_BLT_CMD | XY_SRC_COPY_BLT_WRITE_ALPHA |
+		XY_SRC_COPY_BLT_WRITE_RGB);
+      }
+
+      for (i = 0; i < nbox; i++, pbox++) {
+	 drm_clip_rect_t box;
+	 drm_clip_rect_t sbox;
+
+	 if (pbox->x1 > pbox->x2 ||
+	     pbox->y1 > pbox->y2 ||
+	     pbox->x2 > intelScreen->front.width || 
+	     pbox->y2 > intelScreen->front.height)
+	    continue;
+
+	 box = *pbox;
+
+	 if (rect) {
+	    drm_clip_rect_t rrect;
+
+	    rrect.x1 = dPriv->x + rect->x1;
+	    rrect.y1 = (dPriv->h - rect->y1 - rect->y2) + dPriv->y;
+	    rrect.x2 = rect->x2 + rrect.x1;
+	    rrect.y2 = rect->y2 + rrect.y1;
+	    if (rrect.x1 > box.x1)
+	       box.x1 = rrect.x1;
+	    if (rrect.y1 > box.y1)
+	       box.y1 = rrect.y1;
+	    if (rrect.x2 < box.x2)
+	       box.x2 = rrect.x2;
+	    if (rrect.y2 < box.y2)
+	       box.y2 = rrect.y2;
+
+	    if (box.x1 > box.x2 || box.y1 > box.y2)
+	       continue;
+	 }
+
+	 /* restrict blit to size of actually rendered area */
+	 if (box.x2 - box.x1 > backWidth)
+	    box.x2 = backWidth + box.x1;
+	 if (box.y2 - box.y1 > backHeight)
+	    box.y2 = backHeight + box.y1;
+
+	 DBG(SWAP, "box x1 x2 y1 y2 %d %d %d %d\n",
+	     box.x1, box.x2, box.y1, box.y2);
+
+	 sbox.x1 = box.x1 - dPriv->x;
+	 sbox.y1 = box.y1 - dPriv->y;
+
+	 BEGIN_BATCH(8, INTEL_BATCH_NO_CLIPRECTS);
+	 OUT_BATCH(CMD);
+	 OUT_BATCH(BR13);
+	 OUT_BATCH((box.y1 << 16) | box.x1);
+	 OUT_BATCH((box.y2 << 16) | box.x2);
+
+	 OUT_RELOC(intelScreen->front.buffer, 
+		   DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_WRITE,
+		   DRM_BO_MASK_MEM | DRM_BO_FLAG_WRITE, 0);
+	 OUT_BATCH((sbox.y1 << 16) | sbox.x1);
+	 OUT_BATCH((srcpitch * cpp) & 0xffff);
+	 OUT_RELOC(backRegion->buffer, DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_READ,
+		   DRM_BO_MASK_MEM | DRM_BO_FLAG_READ, 0);
+
+	 ADVANCE_BATCH();
+      }
+
+      if (intel->first_swap_fence)
+	 driFenceUnReference(intel->first_swap_fence);
+      intel->first_swap_fence = intel_batchbuffer_flush(intel->batch);
+      driFenceReference(intel->first_swap_fence);
+   }
+
+   UNLOCK_HARDWARE(intel);
+
+   /* XXX this is bogus. The context here may not even be bound to this drawable! */
+   if (intel->lastStamp != dPriv->lastStamp) {
+      GET_CURRENT_CONTEXT(currctx);
+      struct intel_context *intelcurrent = intel_context(currctx);
+      if (intelcurrent == intel && intelcurrent->driDrawable == dPriv) {
+         intelWindowMoved(intel);
+         intel->lastStamp = dPriv->lastStamp;
+      }
+   }
+
+}
+
+
+
+/**
+ * This will be called whenever the currently bound window is moved/resized.
+ * XXX: actually, it seems to NOT be called when the window is only moved (BP).
+ */
+void
+intelWindowMoved(struct intel_context *intel)
+{
+   GLcontext *ctx = &intel->ctx;
+   __DRIdrawablePrivate *dPriv = intel->driDrawable;
+   struct intel_framebuffer *intel_fb = dPriv->driverPrivate;
+
+   if (!intel->ctx.DrawBuffer) {
+      /* when would this happen? -BP */
+      assert(0);
+      intel->numClipRects = 0;
+   }
+
+   /* Update Mesa's notion of window size */
+   driUpdateFramebufferSize(ctx, dPriv);
+   intel_fb->Base.Initialized = GL_TRUE; /* XXX remove someday */
+
+   {
+      drmI830Sarea *sarea = intel->sarea;
+      drm_clip_rect_t drw_rect = { .x1 = dPriv->x, .x2 = dPriv->x + dPriv->w,
+				   .y1 = dPriv->y, .y2 = dPriv->y + dPriv->h };
+      drm_clip_rect_t pipeA_rect = { .x1 = sarea->pipeA_x, .y1 = sarea->pipeA_y,
+				     .x2 = sarea->pipeA_x + sarea->pipeA_w,
+				     .y2 = sarea->pipeA_y + sarea->pipeA_h };
+      drm_clip_rect_t pipeB_rect = { .x1 = sarea->pipeB_x, .y1 = sarea->pipeB_y,
+				     .x2 = sarea->pipeB_x + sarea->pipeB_w,
+				     .y2 = sarea->pipeB_y + sarea->pipeB_h };
+      GLint areaA = driIntersectArea( drw_rect, pipeA_rect );
+      GLint areaB = driIntersectArea( drw_rect, pipeB_rect );
+      GLuint flags = intel_fb->vblank_flags;
+      GLboolean pf_active;
+      GLint pf_pipes;
+
+      /* Update page flipping info
+       */
+      pf_pipes = 0;
+
+      if (areaA > 0)
+	 pf_pipes |= 1;
+
+      if (areaB > 0)
+	 pf_pipes |= 2;
+
+      intel_fb->pf_current_page = (intel->sarea->pf_current_page >>
+				   (intel_fb->pf_pipes & 0x2)) & 0x3;
+
+      intel_fb->pf_num_pages = 2 /*intel->intelScreen->third.handle ? 3 : 2*/;
+
+      pf_active = pf_pipes && (pf_pipes & intel->sarea->pf_active) == pf_pipes;
+
+      if (pf_active != intel_fb->pf_active)
+	 DBG(LOCK, "%s - Page flipping %sactive\n",
+	     __progname, pf_active ? "" : "in");
+
+      if (pf_active) {
+	 /* Sync pages between pipes if we're flipping on both at the same time */
+	 if (pf_pipes == 0x3 &&	pf_pipes != intel_fb->pf_pipes &&
+	     (intel->sarea->pf_current_page & 0x3) !=
+	     (((intel->sarea->pf_current_page) >> 2) & 0x3)) {
+	    drm_i915_flip_t flip;
+
+	    if (intel_fb->pf_current_page ==
+		(intel->sarea->pf_current_page & 0x3)) {
+	       /* XXX: This is ugly, but emitting two flips 'in a row' can cause
+		* lockups for unknown reasons.
+		*/
+               intel->sarea->pf_current_page =
+		  intel->sarea->pf_current_page & 0x3;
+	       intel->sarea->pf_current_page |=
+		  ((intel_fb->pf_current_page + intel_fb->pf_num_pages - 1) %
+		   intel_fb->pf_num_pages) << 2;
+
+	       flip.pipes = 0x2;
+	    } else {
+               intel->sarea->pf_current_page =
+		  intel->sarea->pf_current_page & (0x3 << 2);
+	       intel->sarea->pf_current_page |=
+		  (intel_fb->pf_current_page + intel_fb->pf_num_pages - 1) %
+		  intel_fb->pf_num_pages;
+
+	       flip.pipes = 0x1;
+	    }
+
+	    drmCommandWrite(intel->driFd, DRM_I915_FLIP, &flip, sizeof(flip));
+	 }
+
+	 intel_fb->pf_pipes = pf_pipes;
+      }
+
+      intel_fb->pf_active = pf_active;
+#if 0
+      intel_flip_renderbuffers(intel_fb);
+      intel_draw_buffer(&intel->ctx, intel->ctx.DrawBuffer);
+#endif
+
+      /* Update vblank info
+       */
+      if (areaB > areaA || (areaA == areaB && areaB > 0)) {
+	 flags = intel_fb->vblank_flags | VBLANK_FLAG_SECONDARY;
+      } else {
+	 flags = intel_fb->vblank_flags & ~VBLANK_FLAG_SECONDARY;
+      }
+
+      if (flags != intel_fb->vblank_flags && intel_fb->vblank_flags &&
+	  !(intel_fb->vblank_flags & VBLANK_FLAG_NO_IRQ)) {
+	 drmVBlank vbl;
+	 int i;
+
+	 vbl.request.type = DRM_VBLANK_ABSOLUTE;
+
+	 if ( intel_fb->vblank_flags & VBLANK_FLAG_SECONDARY ) {
+	    vbl.request.type |= DRM_VBLANK_SECONDARY;
+	 }
+
+	 for (i = 0; i < intel_fb->pf_num_pages; i++) {
+	    if ((intel_fb->vbl_waited - intel_fb->vbl_pending[i]) <= (1<<23))
+	       continue;
+
+	    vbl.request.sequence = intel_fb->vbl_pending[i];
+	    drmWaitVBlank(intel->driFd, &vbl);
+	 }
+
+	 intel_fb->vblank_flags = flags;
+	 driGetCurrentVBlank(dPriv, intel_fb->vblank_flags, &intel_fb->vbl_seq);
+	 intel_fb->vbl_waited = intel_fb->vbl_seq;
+
+	 for (i = 0; i < intel_fb->pf_num_pages; i++) {
+            intel_fb->vbl_pending[i] = intel_fb->vbl_waited;
+	 }
+      }
+   }
+
+   /* This will be picked up by looking at the dirty state flags:
+    */
+
+   /* Update hardware scissor */
+//   ctx->Driver.Scissor(ctx, ctx->Scissor.X, ctx->Scissor.Y,
+//                       ctx->Scissor.Width, ctx->Scissor.Height);
+
+   /* Re-calculate viewport related state */
+//   ctx->Driver.DepthRange( ctx, ctx->Viewport.Near, ctx->Viewport.Far );
+}
+
+
+
+
+
+/* Emit wait for pending flips */
+#if 0
+void
+intel_wait_flips(struct intel_context *intel, GLuint batch_flags)
+{
+   struct intel_framebuffer *intel_fb =
+      (struct intel_framebuffer *) intel->ctx.DrawBuffer;
+   struct intel_renderbuffer *intel_rb =
+      intel_get_renderbuffer(&intel_fb->Base,
+			     intel_fb->Base._ColorDrawBufferMask[0] ==
+			     BUFFER_BIT_FRONT_LEFT ? BUFFER_FRONT_LEFT :
+			     BUFFER_BACK_LEFT);
+
+   if (intel_fb->Base.Name == 0 && intel_rb->pf_pending == intel_fb->pf_seq) {
+      GLint pf_pipes = intel_fb->pf_pipes;
+      BATCH_LOCALS;
+
+      /* Wait for pending flips to take effect */
+      BEGIN_BATCH(2, batch_flags);
+      OUT_BATCH(pf_pipes & 0x1 ? (MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP)
+		: 0);
+      OUT_BATCH(pf_pipes & 0x2 ? (MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_B_FLIP)
+		: 0);
+      ADVANCE_BATCH();
+
+      intel_rb->pf_pending--;
+   }
+}
+#endif
+
+#if 0
+/* Flip the front & back buffers
+ */
+static GLboolean
+intelPageFlip(const __DRIdrawablePrivate * dPriv)
+{
+   struct intel_context *intel;
+   int ret;
+   struct intel_framebuffer *intel_fb = dPriv->driverPrivate;
+
+   DBG(SWAP, "%s\n", __FUNCTION__);
+
+   assert(dPriv);
+   assert(dPriv->driContextPriv);
+   assert(dPriv->driContextPriv->driverPrivate);
+
+   intel = (struct intel_context *) dPriv->driContextPriv->driverPrivate;
+
+   if (intel->intelScreen->drmMinor < 9)
+      return GL_FALSE;
+
+   intelFlush(&intel->ctx);
+
+   ret = 0;
+
+   LOCK_HARDWARE(intel);
+
+   if (dPriv->numClipRects && intel_fb->pf_active) {
+      drm_i915_flip_t flip;
+
+      flip.pipes = intel_fb->pf_pipes;
+
+      ret = drmCommandWrite(intel->driFd, DRM_I915_FLIP, &flip, sizeof(flip));
+   }
+
+   UNLOCK_HARDWARE(intel);
+
+   if (ret || !intel_fb->pf_active)
+      return GL_FALSE;
+
+   if (!dPriv->numClipRects) {
+      usleep(10000);	/* throttle invisible client 10ms */
+   }
+
+   intel_fb->pf_current_page = (intel->sarea->pf_current_page >>
+				(intel_fb->pf_pipes & 0x2)) & 0x3;
+
+   if (dPriv->numClipRects != 0) {
+      intel_get_renderbuffer(&intel_fb->Base, BUFFER_FRONT_LEFT)->pf_pending =
+      intel_get_renderbuffer(&intel_fb->Base, BUFFER_BACK_LEFT)->pf_pending =
+	 ++intel_fb->pf_seq;
+   }
+
+#if 0
+   intel_flip_renderbuffers(intel_fb);
+   intel_draw_buffer(&intel->ctx, &intel_fb->Base);
+#endif
+
+   DBG(SWAP, "%s: success\n", __FUNCTION__);
+
+   return GL_TRUE;
+}
+#endif
+
+
+static GLboolean
+intelScheduleSwap(const __DRIdrawablePrivate * dPriv, GLboolean *missed_target)
+{
+   struct intel_framebuffer *intel_fb = dPriv->driverPrivate;
+   unsigned int interval = driGetVBlankInterval(dPriv, intel_fb->vblank_flags);
+   struct intel_context *intel =
+      intelScreenContext(dPriv->driScreenPriv->private);
+   const intelScreenPrivate *intelScreen = intel->intelScreen;
+   unsigned int target;
+   drm_i915_vblank_swap_t swap;
+   GLboolean ret;
+
+   if (!intel_fb->vblank_flags ||
+       (intel_fb->vblank_flags & VBLANK_FLAG_NO_IRQ) ||
+       intelScreen->drmMinor < (intel_fb->pf_active ? 9 : 6))
+      return GL_FALSE;
+
+   swap.seqtype = DRM_VBLANK_ABSOLUTE;
+
+   if (intel_fb->vblank_flags & VBLANK_FLAG_SYNC) {
+      swap.seqtype |= DRM_VBLANK_NEXTONMISS;
+   } else if (interval == 0) {
+      return GL_FALSE;
+   }
+
+   swap.drawable = dPriv->hHWDrawable;
+   target = swap.sequence = intel_fb->vbl_seq + interval;
+
+   if ( intel_fb->vblank_flags & VBLANK_FLAG_SECONDARY ) {
+      swap.seqtype |= DRM_VBLANK_SECONDARY;
+   }
+
+   LOCK_HARDWARE(intel);
+
+   intel_batchbuffer_flush(intel->batch);
+
+   if ( intel_fb->pf_active ) {
+      swap.seqtype |= DRM_VBLANK_FLIP;
+
+      intel_fb->pf_current_page = (((intel->sarea->pf_current_page >>
+				     (intel_fb->pf_pipes & 0x2)) & 0x3) + 1) %
+				  intel_fb->pf_num_pages;
+   }
+
+   if (!drmCommandWriteRead(intel->driFd, DRM_I915_VBLANK_SWAP, &swap,
+			    sizeof(swap))) {
+      intel_fb->vbl_seq = swap.sequence;
+      swap.sequence -= target;
+      *missed_target = swap.sequence > 0 && swap.sequence <= (1 << 23);
+
+#if 1
+      intel_fb->vbl_pending[1] = intel_fb->vbl_pending[0] = intel_fb->vbl_seq;
+#else
+      intel_get_renderbuffer(&intel_fb->Base, BUFFER_BACK_LEFT)->vbl_pending =
+	 intel_get_renderbuffer(&intel_fb->Base,
+				BUFFER_FRONT_LEFT)->vbl_pending =
+	 intel_fb->vbl_seq;
+#endif
+
+      if (swap.seqtype & DRM_VBLANK_FLIP) {
+#if 0
+	 intel_flip_renderbuffers(intel_fb);
+	 intel_draw_buffer(&intel->ctx, intel->ctx.DrawBuffer);
+#endif
+      }
+
+      ret = GL_TRUE;
+   } else {
+      if (swap.seqtype & DRM_VBLANK_FLIP) {
+	 intel_fb->pf_current_page = ((intel->sarea->pf_current_page >>
+					(intel_fb->pf_pipes & 0x2)) & 0x3) %
+				     intel_fb->pf_num_pages;
+      }
+
+      ret = GL_FALSE;
+   }
+
+   UNLOCK_HARDWARE(intel);
+
+   return ret;
+}
+
+void
+intelSwapBuffers(__DRIdrawablePrivate * dPriv)
+{
+   if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
+      GET_CURRENT_CONTEXT(ctx);
+      struct intel_context *intel;
+
+      if (ctx == NULL)
+	 return;
+
+      intel = intel_context(ctx);
+
+      if (ctx->Visual.doubleBufferMode) {
+	 GLboolean missed_target;
+	 struct intel_framebuffer *intel_fb = dPriv->driverPrivate;
+	 int64_t ust;
+
+	 _mesa_notifySwapBuffers(ctx);  /* flush pending rendering comands */
+
+         if (!intelScheduleSwap(dPriv, &missed_target)) {
+	    driWaitForVBlank(dPriv, &intel_fb->vbl_seq, intel_fb->vblank_flags,
+			     &missed_target);
+
+            intelCopyBuffer(dPriv, NULL);
+	 }
+
+	 intel_fb->swap_count++;
+	 (*dri_interface->getUST) (&ust);
+	 if (missed_target) {
+	    intel_fb->swap_missed_count++;
+	    intel_fb->swap_missed_ust = ust - intel_fb->swap_ust;
+	 }
+
+	 intel_fb->swap_ust = ust;
+      }
+   }
+   else {
+      /* XXX this shouldn't be an error but we can't handle it for now */
+      fprintf(stderr, "%s: drawable has no context!\n", __FUNCTION__);
+   }
+}
+
+void
+intelCopySubBuffer(__DRIdrawablePrivate * dPriv, int x, int y, int w, int h)
+{
+   if (dPriv->driContextPriv && dPriv->driContextPriv->driverPrivate) {
+      struct intel_context *intel =
+         (struct intel_context *) dPriv->driContextPriv->driverPrivate;
+      GLcontext *ctx = &intel->ctx;
+
+      if (ctx->Visual.doubleBufferMode) {
+         drm_clip_rect_t rect;
+	 /* fixup cliprect (driDrawable may have changed?) later */
+         rect.x1 = x;
+         rect.y1 = y;
+         rect.x2 = w;
+         rect.y2 = h;
+         _mesa_notifySwapBuffers(ctx);  /* flush pending rendering comands */
+         intelCopyBuffer(dPriv, &rect);
+      }
+   }
+   else {
+      /* XXX this shouldn't be an error but we can't handle it for now */
+      fprintf(stderr, "%s: drawable has no context!\n", __FUNCTION__);
+   }
+}