18 files changed, 125 insertions, 470 deletions

diff --git a/src/mesa/drivers/dri/i915pipe/intel_blit.c b/src/mesa/drivers/dri/i915pipe/intel_blit.c
index 4a5f58ed9e..062cd2632c 100644
--- a/src/mesa/drivers/dri/i915pipe/intel_blit.c
+++ b/src/mesa/drivers/dri/i915pipe/intel_blit.c
@@ -267,6 +267,8 @@ intelEmitFillBlit(struct intel_context *intel,
              DRM_BO_MASK_MEM | DRM_BO_FLAG_WRITE, dst_offset);
    OUT_BATCH(value);
    ADVANCE_BATCH();
+
+   intel_batchbuffer_flush(intel->batch);
 }
 
 
@@ -385,6 +387,8 @@ intelEmitCopyBlit(struct intel_context *intel,
                 src_offset + src_y * src_pitch);
       ADVANCE_BATCH();
    }
+
+   intel_batchbuffer_flush( intel->batch );
 }
 
 
diff --git a/src/mesa/drivers/dri/i915pipe/intel_buffer_objects.c b/src/mesa/drivers/dri/i915pipe/intel_buffer_objects.c
index eee5fa9bf4..fdcfdca9bb 100644
--- a/src/mesa/drivers/dri/i915pipe/intel_buffer_objects.c
+++ b/src/mesa/drivers/dri/i915pipe/intel_buffer_objects.c
@@ -62,39 +62,6 @@ intel_bufferobj_alloc(GLcontext * ctx, GLuint name, GLenum target)
 }
 
 
-/* Break the COW tie to the region.  The region gets to keep the data.
- */
-void
-intel_bufferobj_release_region(struct intel_context *intel,
-                               struct intel_buffer_object *intel_obj)
-{
-   assert(intel_obj->region->buffer == intel_obj->buffer);
-   intel_obj->region->pbo = NULL;
-   intel_obj->region = NULL;
-   driBOUnReference(intel_obj->buffer);
-   intel_obj->buffer = NULL;
-
-   /* This leads to a large number of buffer deletion/creation events.
-    * Currently the drm doesn't like that:
-    */
-   driGenBuffers(intel->intelScreen->regionPool,
-                 "buffer object", 1, &intel_obj->buffer, 64, 0, 0);
-   LOCK_HARDWARE(intel);
-   driBOData(intel_obj->buffer, intel_obj->Base.Size, NULL, 0);
-   UNLOCK_HARDWARE(intel);
-}
-
-/* Break the COW tie to the region.  Both the pbo and the region end
- * up with a copy of the data.
- */
-void
-intel_bufferobj_cow(struct intel_context *intel,
-                    struct intel_buffer_object *intel_obj)
-{
-   assert(intel_obj->region);
-   intel->pipe->region_cow(intel->pipe, intel_obj->region);
-}
-
 
 /**
  * Deallocate/free a vertex/pixel buffer object.
@@ -103,15 +70,11 @@ intel_bufferobj_cow(struct intel_context *intel,
 static void
 intel_bufferobj_free(GLcontext * ctx, struct gl_buffer_object *obj)
 {
-   struct intel_context *intel = intel_context(ctx);
    struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
 
    assert(intel_obj);
 
-   if (intel_obj->region) {
-      intel_bufferobj_release_region(intel, intel_obj);
-   }
-   else if (intel_obj->buffer) {
+   if (intel_obj->buffer) {
       driDeleteBuffers(1, &intel_obj->buffer);
    }
 
@@ -139,9 +102,6 @@ intel_bufferobj_data(GLcontext * ctx,
    intel_obj->Base.Size = size;
    intel_obj->Base.Usage = usage;
 
-   if (intel_obj->region)
-      intel_bufferobj_release_region(intel, intel_obj);
-
    LOCK_HARDWARE(intel);
    driBOData(intel_obj->buffer, size, data, 0);
    UNLOCK_HARDWARE(intel);
@@ -161,14 +121,10 @@ intel_bufferobj_subdata(GLcontext * ctx,
                         GLsizeiptrARB size,
                         const GLvoid * data, struct gl_buffer_object *obj)
 {
-   struct intel_context *intel = intel_context(ctx);
    struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
 
    assert(intel_obj);
 
-   if (intel_obj->region)
-      intel_bufferobj_cow(intel, intel_obj);
-
    driBOSubData(intel_obj->buffer, offset, size, data);
 }
 
@@ -199,16 +155,12 @@ intel_bufferobj_map(GLcontext * ctx,
                     GLenum target,
                     GLenum access, struct gl_buffer_object *obj)
 {
-   struct intel_context *intel = intel_context(ctx);
    struct intel_buffer_object *intel_obj = intel_buffer_object(obj);
 
    /* XXX: Translate access to flags arg below:
     */
    assert(intel_obj);
 
-   if (intel_obj->region)
-      intel_bufferobj_cow(intel, intel_obj);
-
    obj->Pointer = driBOMap(intel_obj->buffer,
                            DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE, 0);
    return obj->Pointer;
@@ -235,13 +187,6 @@ struct _DriBufferObject *
 intel_bufferobj_buffer(struct intel_context *intel,
                        struct intel_buffer_object *intel_obj, GLuint flag)
 {
-   if (intel_obj->region) {
-      if (flag == INTEL_WRITE_PART)
-         intel_bufferobj_cow(intel, intel_obj);
-      else if (flag == INTEL_WRITE_FULL)
-         intel_bufferobj_release_region(intel, intel_obj);
-   }
-
    return intel_obj->buffer;
 }
 
diff --git a/src/mesa/drivers/dri/i915pipe/intel_buffer_objects.h b/src/mesa/drivers/dri/i915pipe/intel_buffer_objects.h
index a1f63c147b..0f648104ee 100644
--- a/src/mesa/drivers/dri/i915pipe/intel_buffer_objects.h
+++ b/src/mesa/drivers/dri/i915pipe/intel_buffer_objects.h
@@ -42,10 +42,6 @@ struct intel_buffer_object
 {
    struct gl_buffer_object Base;
    struct _DriBufferObject *buffer;     /* the low-level buffer manager's buffer handle */
-
-   struct pipe_region *region; /* Is there a zero-copy texture
-                                   associated with this (pixel)
-                                   buffer object? */
 };
 
 
diff --git a/src/mesa/drivers/dri/i915pipe/intel_buffers.c b/src/mesa/drivers/dri/i915pipe/intel_buffers.c
index e39220fe47..8fd785d20d 100644
--- a/src/mesa/drivers/dri/i915pipe/intel_buffers.c
+++ b/src/mesa/drivers/dri/i915pipe/intel_buffers.c
@@ -295,134 +295,6 @@ intelWindowMoved(struct intel_context *intel)
 
 
 
-/**
- * Called by ctx->Driver.Clear.
- * XXX NO LONGER USED - REMOVE IN NEAR FUTURE
- */
-#if 0
-static void
-intelClear(GLcontext *ctx, GLbitfield mask)
-#else
-static void
-OLD_intelClear(struct pipe_context *pipe,
-           GLboolean color, GLboolean depth,
-           GLboolean stencil, GLboolean accum)
-#endif
-{
-   GLcontext *ctx = (GLcontext *) pipe->glctx;
-   const GLuint colorMask = *((GLuint *) & ctx->Color.ColorMask);
-   GLbitfield tri_mask = 0;
-   GLbitfield blit_mask = 0;
-   GLbitfield swrast_mask = 0;
-   struct gl_framebuffer *fb = ctx->DrawBuffer;
-   GLuint i;
-
-   GLbitfield mask;
-
-   if (color)
-      mask = ctx->DrawBuffer->_ColorDrawBufferMask[0]; /*XXX temporary*/
-   else
-      mask = 0x0;
-
-   if (0)
-      fprintf(stderr, "%s\n", __FUNCTION__);
-
-   /* HW color buffers (front, back, aux, generic FBO, etc) */
-   if (colorMask == ~0) {
-      /* clear all R,G,B,A */
-      /* XXX FBO: need to check if colorbuffers are software RBOs! */
-      blit_mask |= (mask & BUFFER_BITS_COLOR);
-   }
-   else {
-      /* glColorMask in effect */
-      tri_mask |= (mask & BUFFER_BITS_COLOR);
-   }
-
-   /* HW stencil */
-   if (stencil) {
-      const struct pipe_region *stencilRegion
-         = intel_get_rb_region(fb, BUFFER_STENCIL);
-      if (stencilRegion) {
-         /* have hw stencil */
-         if ((ctx->Stencil.WriteMask[0] & 0xff) != 0xff) {
-            /* not clearing all stencil bits, so use triangle clearing */
-            tri_mask |= BUFFER_BIT_STENCIL;
-         }
-         else {
-            /* clearing all stencil bits, use blitting */
-            blit_mask |= BUFFER_BIT_STENCIL;
-         }
-      }
-   }
-
-   /* HW depth */
-   if (depth) {
-      /* clear depth with whatever method is used for stencil (see above) */
-      if (tri_mask & BUFFER_BIT_STENCIL)
-         tri_mask |= BUFFER_BIT_DEPTH;
-      else
-         blit_mask |= BUFFER_BIT_DEPTH;
-   }
-
-   /* SW fallback clearing */
-   swrast_mask = mask & ~tri_mask & ~blit_mask;
-
-   for (i = 0; i < BUFFER_COUNT; i++) {
-      GLuint bufBit = 1 << i;
-      if ((blit_mask | tri_mask) & bufBit) {
-         if (!fb->Attachment[i].Renderbuffer->ClassID) {
-            blit_mask &= ~bufBit;
-            tri_mask &= ~bufBit;
-            swrast_mask |= bufBit;
-         }
-      }
-   }
-
-
-   intelFlush(ctx);             /* XXX intelClearWithBlit also does this */
-
-   if (blit_mask)
-      intelClearWithBlit(ctx, blit_mask);
-
-#if 0
-   if (swrast_mask | tri_mask)
-      _swrast_Clear(ctx, swrast_mask | tri_mask);
-#else
-   softpipe_clear(pipe, GL_FALSE,
-                  (swrast_mask | tri_mask) & BUFFER_BIT_DEPTH,
-                  (swrast_mask | tri_mask) & BUFFER_BIT_STENCIL,
-                  (swrast_mask | tri_mask) & BUFFER_BIT_ACCUM);
-#endif
-}
-
-
-/**
- * Clear buffers.  Called via pipe->clear().
- */
-void
-intelClear(struct pipe_context *pipe,
-           GLboolean color, GLboolean depth,
-           GLboolean stencil, GLboolean accum)
-{
-   GLcontext *ctx = (GLcontext *) pipe->glctx;
-   struct intel_context *intel = intel_context(ctx);
-
-   /* XXX
-    * Examine stencil and color writemasks to determine if we can clear
-    * with blits.
-    */
-
-   intelFlush(&intel->ctx);
-   LOCK_HARDWARE(intel);
-
-   softpipe_clear(pipe, color, depth, stencil, accum);
-
-   intel_batchbuffer_flush(intel->batch);
-
-   UNLOCK_HARDWARE(intel);
-}
-
-
 
 /* Emit wait for pending flips */
 void
@@ -835,9 +707,6 @@ intelReadBuffer(GLcontext * ctx, GLenum mode)
 void
 intelInitBufferFuncs(struct dd_function_table *functions)
 {
-#if 0
-   functions->Clear = intelClear;
-#endif
    functions->DrawBuffer = intelDrawBuffer;
    functions->ReadBuffer = intelReadBuffer;
 }
diff --git a/src/mesa/drivers/dri/i915pipe/intel_buffers.h b/src/mesa/drivers/dri/i915pipe/intel_buffers.h
index f0602eebae..5834e39501 100644
--- a/src/mesa/drivers/dri/i915pipe/intel_buffers.h
+++ b/src/mesa/drivers/dri/i915pipe/intel_buffers.h
@@ -52,9 +52,4 @@ extern void intel_draw_buffer(GLcontext * ctx, struct gl_framebuffer *fb);
 
 extern void intelInitBufferFuncs(struct dd_function_table *functions);
 
-extern void
-intelClear(struct pipe_context *pipe,
-           GLboolean color, GLboolean depth,
-           GLboolean stencil, GLboolean accum);
-
 #endif /* INTEL_BUFFERS_H */
diff --git a/src/mesa/drivers/dri/i915pipe/intel_context.c b/src/mesa/drivers/dri/i915pipe/intel_context.c
index be8235d7d1..9c32ab0ddf 100644
--- a/src/mesa/drivers/dri/i915pipe/intel_context.c
+++ b/src/mesa/drivers/dri/i915pipe/intel_context.c
@@ -417,11 +417,15 @@ intelCreateContext(const __GLcontextModes * mesaVis,
     */
    st_create_context( &intel->ctx,
 		      softpipe_create() );
-   
+
+   /* KW: Not sure I like this - we should only be talking to the
+    * state_tracker.  The pipe code will need some way of talking to
+    * us, eg for batchbuffer ioctls, and there will need to be a
+    * buffer manager interface.  So, this is a temporary hack, right?
+    */
    intel->pipe = intel->ctx.st->pipe;
    intel->pipe->screen = intelScreen;
    intel->pipe->glctx = ctx;
-   intel->pipe->clear = intelClear;
    intelScreen->pipe = intel->pipe;
    intel_init_region_functions(intel->pipe);
 
diff --git a/src/mesa/drivers/dri/i915pipe/intel_regions.c b/src/mesa/drivers/dri/i915pipe/intel_regions.c
index bdbc59e7ac..f2280ceb51 100644
--- a/src/mesa/drivers/dri/i915pipe/intel_regions.c
+++ b/src/mesa/drivers/dri/i915pipe/intel_regions.c
@@ -75,10 +75,6 @@ intel_region_map(struct pipe_context *pipe, struct pipe_region *region)
 {
    DBG("%s\n", __FUNCTION__);
    if (!region->map_refcount++) {
-      if (region->pbo) {
-         pipe->region_cow(pipe, region);
-      }
-
       region->map = driBOMap(region->buffer,
                              DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE, 0);
    }
@@ -96,8 +92,6 @@ intel_region_unmap(struct pipe_context *pipe, struct pipe_region *region)
    }
 }
 
-#undef TEST_CACHED_TEXTURES
-
 static struct pipe_region *
 intel_region_alloc(struct pipe_context *pipe,
                    GLuint cpp, GLuint pitch, GLuint height)
@@ -115,13 +109,9 @@ intel_region_alloc(struct pipe_context *pipe,
 
    driGenBuffers(intelScreen->regionPool,
                  "region", 1, &region->buffer, 64,
-#ifdef TEST_CACHED_TEXTURES		 
-		 DRM_BO_FLAG_MEM_TT | DRM_BO_FLAG_BIND_CACHED |
-		 DRM_BO_FLAG_READ | DRM_BO_FLAG_WRITE, 
-#else
 		 0,
-#endif
 		 0);
+
    LOCK_HARDWARE(intel);
    driBOData(region->buffer, pitch * cpp * height, NULL, 0);
    UNLOCK_HARDWARE(intel);
@@ -142,9 +132,6 @@ intel_region_release(struct pipe_context *pipe, struct pipe_region **region)
    if ((*region)->refcount == 0) {
       assert((*region)->map_refcount == 0);
 
-      if ((*region)->pbo)
-	 (*region)->pbo->region = NULL;
-      (*region)->pbo = NULL;
       driBOUnReference((*region)->buffer);
       free(*region);
    }
@@ -275,15 +262,6 @@ intel_region_data(struct pipe_context *pipe,
    if (intel == NULL)
       return;
 
-   if (dst->pbo) {
-      if (dstx == 0 &&
-          dsty == 0 && width == dst->pitch && height == dst->height)
-         pipe->region_release_pbo(pipe, dst);
-      else
-         pipe->region_cow(pipe, dst);
-   }
-
-
    LOCK_HARDWARE(intel);
 
    _mesa_copy_rect(pipe->region_map(pipe, dst) + dst_offset,
@@ -317,14 +295,6 @@ intel_region_copy(struct pipe_context *pipe,
    if (intel == NULL)
       return;
 
-   if (dst->pbo) {
-      if (dstx == 0 &&
-          dsty == 0 && width == dst->pitch && height == dst->height)
-         pipe->region_release_pbo(pipe, dst);
-      else
-         pipe->region_cow(pipe, dst);
-   }
-
    assert(src->cpp == dst->cpp);
 
    intelEmitCopyBlit(intel,
@@ -354,141 +324,18 @@ intel_region_fill(struct pipe_context *pipe,
    if (intel == NULL)
       return;   
 
-   if (dst->pbo) {
-      if (dstx == 0 &&
-          dsty == 0 && width == dst->pitch && height == dst->height)
-         pipe->region_release_pbo(pipe, dst);
-      else
-         pipe->region_cow(pipe, dst);
-   }
-
    intelEmitFillBlit(intel,
                      dst->cpp,
                      dst->pitch, dst->buffer, dst_offset,
                      dstx, dsty, width, height, value, mask);
 }
 
-/* Attach to a pbo, discarding our data.  Effectively zero-copy upload
- * the pbo's data.
- */
-static void
-intel_region_attach_pbo(struct pipe_context *pipe,
-                        struct pipe_region *region,
-                        struct intel_buffer_object *pbo)
-{
-   if (region->pbo == pbo)
-      return;
-
-   /* If there is already a pbo attached, break the cow tie now.
-    * Don't call pipe_region_release_pbo() as that would
-    * unnecessarily allocate a new buffer we would have to immediately
-    * discard.
-    */
-   if (region->pbo) {
-      region->pbo->region = NULL;
-      region->pbo = NULL;
-   }
-
-   if (region->buffer) {
-      driDeleteBuffers(1, &region->buffer);
-      region->buffer = NULL;
-   }
-
-   region->pbo = pbo;
-   region->pbo->region = region;
-   region->buffer = driBOReference(pbo->buffer);
-}
-
 
-/* Break the COW tie to the pbo.  The pbo gets to keep the data.
- */
-static void
-intel_region_release_pbo(struct pipe_context *pipe,
-                         struct pipe_region *region)
-{
-   intelScreenPrivate *intelScreen = pipe_screen(pipe);
-   struct intel_context *intel = intelScreenContext(intelScreen);
-
-   assert(region->buffer == region->pbo->buffer);
-   region->pbo->region = NULL;
-   region->pbo = NULL;
-   driBOUnReference(region->buffer);
-   region->buffer = NULL;
-
-   driGenBuffers(intelScreen->regionPool,
-                 "region", 1, &region->buffer, 64, 0, 0);
-   
-   LOCK_HARDWARE(intel);
-   driBOData(region->buffer,
-             region->cpp * region->pitch * region->height, NULL, 0);
-   UNLOCK_HARDWARE(intel);
-}
-
-/* Break the COW tie to the pbo.  Both the pbo and the region end up
- * with a copy of the data.
- */
-static void
-intel_region_cow(struct pipe_context *pipe, struct pipe_region *region)
-{
-   intelScreenPrivate *intelScreen = pipe_screen(pipe);
-   struct intel_context *intel = intelScreenContext(intelScreen);
-   struct intel_buffer_object *pbo = region->pbo;
-
-   if (intel == NULL)
-      return;
-
-   pipe->region_release_pbo(pipe, region);
-
-   assert(region->cpp * region->pitch * region->height == pbo->Base.Size);
-
-   DBG("%s (%d bytes)\n", __FUNCTION__, pbo->Base.Size);
-
-   /* Now blit from the texture buffer to the new buffer: 
-    */
-
-   intel_batchbuffer_flush(intel->batch);
-
-   if (!intel->locked) {
-      LOCK_HARDWARE(intel);
-      intelEmitCopyBlit(intel,
-			region->cpp,
-			region->pitch,
-			region->buffer, 0,
-			region->pitch,
-			pbo->buffer, 0,
-			0, 0, 0, 0, 
-			region->pitch, region->height,
-			GL_COPY);
-      
-      intel_batchbuffer_flush(intel->batch);
-      UNLOCK_HARDWARE(intel);
-   }
-   else {
-      intelEmitCopyBlit(intel,
-			region->cpp,
-			region->pitch,
-			region->buffer, 0,
-			region->pitch,
-			pbo->buffer, 0,
-			0, 0, 0, 0, 
-			region->pitch, region->height,
-			GL_COPY);
-      
-      intel_batchbuffer_flush(intel->batch);
-   }
-}
 
 static struct _DriBufferObject *
 intel_region_buffer(struct pipe_context *pipe,
                     struct pipe_region *region, GLuint flag)
 {
-   if (region->pbo) {
-      if (flag == INTEL_WRITE_PART)
-         pipe->region_cow(pipe, region);
-      else if (flag == INTEL_WRITE_FULL)
-         pipe->region_release_pbo(pipe, region);
-   }
-
    return region->buffer;
 }
 
@@ -507,9 +354,6 @@ intel_init_region_functions(struct pipe_context *pipe)
    pipe->region_data = intel_region_data;
    pipe->region_copy = intel_region_copy;
    pipe->region_fill = intel_region_fill;
-   pipe->region_cow = intel_region_cow;
-   pipe->region_attach_pbo = intel_region_attach_pbo;
-   pipe->region_release_pbo = intel_region_release_pbo;
    pipe->region_buffer = intel_region_buffer;
 }
 
diff --git a/src/mesa/drivers/dri/i915pipe/intel_screen.c b/src/mesa/drivers/dri/i915pipe/intel_screen.c
index fad3a2c29b..565bfc5243 100644
--- a/src/mesa/drivers/dri/i915pipe/intel_screen.c
+++ b/src/mesa/drivers/dri/i915pipe/intel_screen.c
@@ -101,7 +101,6 @@ intel_recreate_static(struct pipe_context *pipe,
 		      void *virtual,
 		      GLuint cpp, GLuint pitch, GLuint height)
 {
-   struct intel_context *intel = 0;
   if (region) {
      pipe->region_update_static(pipe, region, mem_type, offset,
                                 virtual, cpp, pitch, height);
diff --git a/src/mesa/drivers/dri/i915pipe/intel_state.c b/src/mesa/drivers/dri/i915pipe/intel_state.c
index fc98b6a12b..2455f177da 100644
--- a/src/mesa/drivers/dri/i915pipe/intel_state.c
+++ b/src/mesa/drivers/dri/i915pipe/intel_state.c
@@ -245,8 +245,6 @@ intelDepthRange(GLcontext * ctx, GLclampd nearval, GLclampd farval)
 static void
 intelRenderMode(GLcontext * ctx, GLenum mode)
 {
-   struct intel_context *intel = intel_context(ctx);
-   FALLBACK(intel, INTEL_FALLBACK_RENDERMODE, (mode != GL_RENDER));
 }
 
 
diff --git a/src/mesa/drivers/dri/i915pipe/intel_tex_image.c b/src/mesa/drivers/dri/i915pipe/intel_tex_image.c
index 37307b49c5..b4e440e49a 100644
--- a/src/mesa/drivers/dri/i915pipe/intel_tex_image.c
+++ b/src/mesa/drivers/dri/i915pipe/intel_tex_image.c
@@ -254,38 +254,7 @@ try_pbo_zcopy(struct intel_context *intel,
               GLint width, GLint height,
               GLenum format, GLenum type, const void *pixels)
 {
-   struct intel_buffer_object *pbo = intel_buffer_object(unpack->BufferObj);
-   GLuint src_offset, src_stride;
-   GLuint dst_offset, dst_stride;
-
-   if (!pbo ||
-       intel->ctx._ImageTransferState ||
-       unpack->SkipPixels || unpack->SkipRows) {
-      _mesa_printf("%s: failure 1\n", __FUNCTION__);
-      return GL_FALSE;
-   }
-
-   src_offset = (GLuint) pixels;
-
-   if (unpack->RowLength > 0)
-      src_stride = unpack->RowLength;
-   else
-      src_stride = width;
-
-   dst_offset = intel_miptree_image_offset(intelImage->mt,
-                                           intelImage->face,
-                                           intelImage->level);
-
-   dst_stride = intelImage->mt->pitch;
-
-   if (src_stride != dst_stride || dst_offset != 0 || src_offset != 0) {
-      _mesa_printf("%s: failure 2\n", __FUNCTION__);
-      return GL_FALSE;
-   }
-
-   intel->pipe->region_attach_pbo(intel->pipe, intelImage->mt->region, pbo);
-
-   return GL_TRUE;
+   return GL_FALSE;
 }
 
 
diff --git a/src/mesa/main/buffers.c b/src/mesa/main/buffers.c
index bb019b5998..eea443c03c 100644
--- a/src/mesa/main/buffers.c
+++ b/src/mesa/main/buffers.c
@@ -178,15 +178,7 @@ _mesa_Clear( GLbitfield mask )
       }
 
       ASSERT(ctx->Driver.Clear);
-#if 0
       ctx->Driver.Clear(ctx, bufferMask);
-#else
-      st_clear(ctx->st, 
-               (mask & GL_COLOR_BUFFER_BIT) ? GL_TRUE : GL_FALSE,
-               (bufferMask & BUFFER_BIT_DEPTH) ? GL_TRUE : GL_FALSE,
-               (bufferMask & BUFFER_BIT_STENCIL) ? GL_TRUE : GL_FALSE,
-               (bufferMask & BUFFER_BIT_ACCUM) ? GL_TRUE : GL_FALSE);
-#endif                     
    }
 }
 
diff --git a/src/mesa/pipe/p_context.h b/src/mesa/pipe/p_context.h
index 8e51daae06..4f5937b8f3 100644
--- a/src/mesa/pipe/p_context.h
+++ b/src/mesa/pipe/p_context.h
@@ -175,15 +175,6 @@ struct pipe_context {
                        GLuint width, GLuint height,
                        GLuint value, GLuint mask);
 
-   void (*region_cow)(struct pipe_context *pipe, struct pipe_region *region);
-
-   void (*region_attach_pbo)(struct pipe_context *pipe,
-                             struct pipe_region *region,
-                             struct intel_buffer_object *pbo);
-
-   void (*region_release_pbo)(struct pipe_context *pipe,
-                              struct pipe_region *region);
-
    struct _DriBufferObject *(*region_buffer)(struct pipe_context *pipe,
                                              struct pipe_region *region,
                                              GLuint flag);
diff --git a/src/mesa/pipe/p_state.h b/src/mesa/pipe/p_state.h
index 0767fc2fcb..d6ed514fb1 100644
--- a/src/mesa/pipe/p_state.h
+++ b/src/mesa/pipe/p_state.h
@@ -238,7 +238,6 @@ struct pipe_sampler_state
 
 
 struct _DriBufferObject;
-struct intel_buffer_object;
 
 struct pipe_region
 {
@@ -252,8 +251,6 @@ struct pipe_region
    GLuint map_refcount;  /**< Reference count for mapping */
 
    GLuint draw_offset; /**< Offset of drawing address within the region */
-
-   struct intel_buffer_object *pbo;     /* zero-copy uploads */
 };
 
 
diff --git a/src/mesa/pipe/softpipe/sp_clear.c b/src/mesa/pipe/softpipe/sp_clear.c
index a133b48891..09cc643003 100644
--- a/src/mesa/pipe/softpipe/sp_clear.c
+++ b/src/mesa/pipe/softpipe/sp_clear.c
@@ -60,53 +60,20 @@ color_value(GLuint format, const GLfloat color[4])
    }
 }
  
-static GLuint
-color_mask(GLuint format, GLuint pipeMask)
-{
-   GLuint mask = 0x0;
-   switch (format) {
-   case PIPE_FORMAT_U_R8_G8_B8_A8:
-      if (pipeMask & PIPE_MASK_R)  mask |= 0xff000000;
-      if (pipeMask & PIPE_MASK_G)  mask |= 0x00ff0000;
-      if (pipeMask & PIPE_MASK_B)  mask |= 0x0000ff00;
-      if (pipeMask & PIPE_MASK_A)  mask |= 0x000000ff;
-      break;
-   case PIPE_FORMAT_U_A8_R8_G8_B8:
-      if (pipeMask & PIPE_MASK_R)  mask |= 0x00ff0000;
-      if (pipeMask & PIPE_MASK_G)  mask |= 0x0000ff00;
-      if (pipeMask & PIPE_MASK_B)  mask |= 0x000000ff;
-      if (pipeMask & PIPE_MASK_A)  mask |= 0xff000000;
-      break;
-   case PIPE_FORMAT_U_R5_G6_B5:
-      if (pipeMask & PIPE_MASK_R)  mask |= 0xf800;
-      if (pipeMask & PIPE_MASK_G)  mask |= 0x07e0;
-      if (pipeMask & PIPE_MASK_B)  mask |= 0x001f;
-      if (pipeMask & PIPE_MASK_A)  mask |= 0;
-      break;
-   default:
-      return 0;
-   }
-   return mask;
-}
 
-
-/**
- * XXX This should probaby be renamed to something like pipe_clear_with_blits()
- * and moved into a device-independent pipe file.
- */
 void
 softpipe_clear(struct pipe_context *pipe, GLboolean color, GLboolean depth,
                GLboolean stencil, GLboolean accum)
 {
-   const struct softpipe_context *softpipe = softpipe_context(pipe);
+   struct softpipe_context *softpipe = softpipe_context(pipe);
    GLint x, y, w, h;
 
-   softpipe_update_derived(softpipe);
+   softpipe_update_derived(softpipe); /* not needed?? */
 
-   x = softpipe->cliprect.minx;
-   y = softpipe->cliprect.miny;
-   w = softpipe->cliprect.maxx - x;
-   h = softpipe->cliprect.maxy - y;
+   x = 0;
+   y = 0;
+   w = softpipe->framebuffer.cbufs[0]->width;
+   h = softpipe->framebuffer.cbufs[0]->height;
 
    if (color) {
       GLuint i;
@@ -114,8 +81,7 @@ softpipe_clear(struct pipe_context *pipe, GLboolean color, GLboolean depth,
          struct pipe_surface *ps = softpipe->framebuffer.cbufs[i];
          GLuint clearVal = color_value(ps->format,
                                        softpipe->clear_color.color);
-         GLuint mask = color_mask(ps->format, softpipe->blend.colormask);
-         pipe->region_fill(pipe, ps->region, 0, x, y, w, h, clearVal, mask);
+         pipe->region_fill(pipe, ps->region, 0, x, y, w, h, clearVal, ~0);
       }
    }
 
@@ -124,10 +90,13 @@ softpipe_clear(struct pipe_context *pipe, GLboolean color, GLboolean depth,
       /* clear Z and stencil together */
       struct pipe_surface *ps = softpipe->framebuffer.zbuf;
       if (ps->format == PIPE_FORMAT_S8_Z24) {
-         GLuint mask = (softpipe->stencil.write_mask[0] << 8) | 0xffffff;
+         GLuint mask = (softpipe->stencil.write_mask[0] << 8) | 0xffffff;	 
          GLuint clearVal = (GLuint) (softpipe->depth_test.clear * 0xffffff);
+
+	 assert (mask == ~0);
+
          clearVal |= (softpipe->stencil.clear_value << 24);
-         pipe->region_fill(pipe, ps->region, 0, x, y, w, h, clearVal, mask);
+         pipe->region_fill(pipe, ps->region, 0, x, y, w, h, clearVal, ~0);
       }
       else {
          /* XXX Z24_S8 format? */
@@ -138,33 +107,36 @@ softpipe_clear(struct pipe_context *pipe, GLboolean color, GLboolean depth,
       /* separate Z and stencil */
       if (depth) {
          struct pipe_surface *ps = softpipe->framebuffer.zbuf;
-         GLuint mask, clearVal;
+         GLuint clearVal;
 
          switch (ps->format) {
          case PIPE_FORMAT_U_Z16:
             clearVal = (GLuint) (softpipe->depth_test.clear * 65535.0);
-            mask = 0xffff;
             break;
          case PIPE_FORMAT_U_Z32:
             clearVal = (GLuint) (softpipe->depth_test.clear * 0xffffffff);
-            mask = 0xffffffff;
             break;
          case PIPE_FORMAT_S8_Z24:
             clearVal = (GLuint) (softpipe->depth_test.clear * 0xffffff);
-            mask = 0xffffff;
             break;
          default:
             assert(0);
          }
 
-         pipe->region_fill(pipe, ps->region, 0, x, y, w, h, clearVal, mask);
+         pipe->region_fill(pipe, ps->region, 0, x, y, w, h, clearVal, ~0);
       }
 
       if (stencil) {
          struct pipe_surface *ps = softpipe->framebuffer.sbuf;
          GLuint clearVal = softpipe->stencil.clear_value;
+
+	 /* If this is not ~0, we shouldn't get here - clear should be
+	  * done with geometry instead.
+	  */
          GLuint mask = softpipe->stencil.write_mask[0];
 
+	 assert((mask & 0xff) == 0xff);
+
          switch (ps->format) {
          case PIPE_FORMAT_S8_Z24:
             clearVal = clearVal << 24;
@@ -187,7 +159,7 @@ softpipe_clear(struct pipe_context *pipe, GLboolean color, GLboolean depth,
        */
       struct pipe_surface *ps = softpipe->framebuffer.abuf;
       GLuint clearVal = 0x0; /* XXX FIX */
-      GLuint mask = !0;
+      GLuint mask = ~0;
       assert(ps);
       pipe->region_fill(pipe, ps->region, 0, x, y, w, h, clearVal, mask);
    }
diff --git a/src/mesa/sources b/src/mesa/sources
index d9ee7266e5..d0fe3a979f 100644
--- a/src/mesa/sources
+++ b/src/mesa/sources
@@ -191,6 +191,7 @@ STATETRACKER_SOURCES = \
 	state_tracker/st_atom_stencil.c \
 	state_tracker/st_atom_stipple.c \
 	state_tracker/st_atom_viewport.c \
+	state_tracker/st_cb_clear.c \
 	state_tracker/st_cb_program.c \
 	state_tracker/st_draw.c \
 	state_tracker/st_context.c \
diff --git a/src/mesa/state_tracker/st_cb_clear.c b/src/mesa/state_tracker/st_cb_clear.c
new file mode 100644
index 0000000000..d9cb83b8ad
--- /dev/null
+++ b/src/mesa/state_tracker/st_cb_clear.c
@@ -0,0 +1,89 @@
+/**************************************************************************
+ * 
+ * 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.
+ * 
+ **************************************************************************/
+
+ /*
+  * Authors:
+  *   Keith Whitwell <keith@tungstengraphics.com>
+  *   Brian Paul
+  */
+
+#include "st_context.h"
+#include "glheader.h"
+#include "macros.h"
+#include "enums.h"
+#include "st_context.h"
+#include "st_atom.h"
+#include "pipe/p_context.h"
+
+
+
+/* XXX: doesn't pick up the differences between front/back/left/right
+ * clears.  Need to sort that out...
+ */
+static void st_clear(GLcontext *ctx, GLbitfield mask)
+{
+   struct st_context *st = ctx->st;
+   GLboolean color = (mask & BUFFER_BITS_COLOR) ? GL_TRUE : GL_FALSE;
+   GLboolean depth = (mask & BUFFER_BIT_DEPTH) ? GL_TRUE : GL_FALSE;
+   GLboolean stencil = (mask & BUFFER_BIT_STENCIL) ? GL_TRUE : GL_FALSE;
+   GLboolean accum = (mask & BUFFER_BIT_ACCUM) ? GL_TRUE : GL_FALSE;
+   GLboolean fullscreen = 1;	/* :-) */
+
+   /* This makes sure the softpipe has the latest scissor, etc values */
+   st_validate_state( st );
+
+   if (fullscreen) {
+      /* pipe->clear() should clear a particular surface, so that we
+       * can iterate over render buffers at this level and clear the
+       * ones GL is asking for.  
+       *
+       * Will probably need something like pipe->clear_z_stencil() to
+       * cope with the special case of paired and unpaired z/stencil
+       * buffers, though could perhaps deal with them explicitly at
+       * this level.
+       */
+      st->pipe->clear(st->pipe, color, depth, stencil, accum);
+   }
+   else {
+      /* Convert to geometry, etc:
+       */
+   }
+}
+
+
+void st_init_cb_clear( struct st_context *st )
+{
+   struct dd_function_table *functions = &st->ctx->Driver;
+
+   functions->Clear = st_clear;
+}
+
+
+void st_destroy_cb_clear( struct st_context *st )
+{
+}
+
diff --git a/src/mesa/state_tracker/st_context.c b/src/mesa/state_tracker/st_context.c
index 6308e81a61..4d3f0ec4d3 100644
--- a/src/mesa/state_tracker/st_context.c
+++ b/src/mesa/state_tracker/st_context.c
@@ -58,6 +58,7 @@ struct st_context *st_create_context( GLcontext *ctx,
    st_init_atoms( st );
    st_init_draw( st );
    st_init_cb_program( st );
+   st_init_cb_clear( st );
 
    return st;
 }
diff --git a/src/mesa/state_tracker/st_draw.c b/src/mesa/state_tracker/st_draw.c
index a424d1dd05..95fa43df4d 100644
--- a/src/mesa/state_tracker/st_draw.c
+++ b/src/mesa/state_tracker/st_draw.c
@@ -107,14 +107,3 @@ void st_destroy_draw( struct st_context *st )
 }
 
 
-/** XXX temporary here */
-void
-st_clear(struct st_context *st, GLboolean color, GLboolean depth,
-         GLboolean stencil, GLboolean accum)
-{
-   /* This makes sure the softpipe has the latest scissor, etc values */
-   st_validate_state( st );
-
-   st->pipe->clear(st->pipe, color, depth, stencil, accum);
-}
-