Reorder across clears

src/gpu/GrCommandBuilder.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrCommandBuilder.h"
 
 #include "GrInOrderCommandBuilder.h"
@@ skipping 14 matching lines @@
     SkASSERT(renderTarget);
 
     SkIRect r;
     if (NULL == rect) {
         // We could do something smart and remove previous draws and clears to
         // the current render target. If we get that smart we have to make sure
         // those draws aren't read before this clear (render-to-texture).
         r.setLTRB(0, 0, renderTarget->width(), renderTarget->height());
         rect = &r;
     }
+
+    SkASSERT(color == GrColor_ILLEGAL ||
+             canIgnoreRect ||
+             (rect->fLeft <= rect->fRight && rect->fTop <= rect->fBottom));
+
     Clear* clr = GrNEW_APPEND_TO_RECORDER(*this->cmdBuffer(), Clear, (renderTarget));
     GrColorIsPMAssert(color);
     clr->fColor = color;
     clr->fRect = *rect;
     clr->fCanIgnoreRect = canIgnoreRect;
     return clr;
 }
 
 GrTargetCommands::Cmd* GrCommandBuilder::recordClearStencilClip(const SkIRect& rect,
                                                                 bool insideClip,
@@ skipping 34 matching lines @@
 
     GrXferBarrierType barrierType;
     if (!xp.willNeedXferBarrier(rt, caps, &barrierType)) {
         return NULL;
     }
 
     XferBarrier* xb = GrNEW_APPEND_TO_RECORDER(*this->cmdBuffer(), XferBarrier, (rt));
     xb->fBarrierType = barrierType;
     return xb;
 }