Add Batch logging

src/gpu/GrReorderCommandBuilder.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 "GrReorderCommandBuilder.h"
 
 template <class Left, class Right>
 static bool intersect(const Left& a, const Right& b) {
     SkASSERT(a.fLeft <= a.fRight && a.fTop <= a.fBottom &&
              b.fLeft <= b.fRight && b.fTop <= b.fBottom);
     return a.fLeft < b.fRight && b.fLeft < a.fRight &&
            a.fTop < b.fBottom && b.fTop < a.fBottom;
 }
 
 GrTargetCommands::Cmd* GrReorderCommandBuilder::recordDrawBatch(State* state, GrBatch* batch) {
     // Check if there is a Batch Draw we can batch with by linearly searching back until we either
     // 1) check every draw
     // 2) intersect with something
     // 3) find a 'blocker'
     // Experimentally we have found that most batching occurs within the first 10 comparisons.
     static const int kMaxLookback = 10;
     int i = 0;
     batch->setPipeline(state->getPipeline());
     GrRenderTarget* rt = state->getPipeline()->getRenderTarget();
+
+    GrBATCH_INFO("Re-Recording (%s, B%u)\n"
+                 "\tRenderTarget %p\n"
+                 "\tBounds (%f, %f, %f, %f)\n",
+                 batch->name(),
+                 batch->uniqueID(), rt,
+                 batch->bounds().fLeft, batch->bounds().fRight,
+                 batch->bounds().fTop, batch->bounds().fBottom);
+#if GR_BATCH_SPEW
+    SkDebugf("\tColorStages:\n");
+    for (int i = 0; i < state->getPipeline()->numColorFragmentStages(); i++) {
+        SkDebugf("\t\t%s\n", state->getPipeline()->getColorStage(i).processor()->name());
+    }
+    SkDebugf("\tCoverageStages:\n");
+    for (int i = 0; i < state->getPipeline()->numCoverageFragmentStages(); i++) {
+        SkDebugf("\t\t%s\n", state->getPipeline()->getCoverageStage(i).processor()->name());
+    }
+    SkDebugf("\tXP: %s\n", state->getPipeline()->getXferProcessor()->name());
+#endif
+    GrBATCH_INFO("\tOutcome:\n");
     if (!this->cmdBuffer()->empty()) {
         GrTargetCommands::CmdBuffer::ReverseIter reverseIter(*this->cmdBuffer());
 
         do {
             if (Cmd::kDrawBatch_CmdType == reverseIter->type()) {
                 DrawBatch* previous = static_cast<DrawBatch*>(reverseIter.get());
 
                 if (previous->fBatch->pipeline()->getRenderTarget() != rt) {
+                    GrBATCH_INFO("\t\tBreaking because of (%s, B%u) Rendertarget\n",
+                                 previous->fBatch->name(), previous->fBatch->uniqueID());
                     break;
                 }
                 // We cannot continue to search backwards if the render target changes
                 if (previous->fBatch->combineIfPossible(batch)) {
+                    GrBATCH_INFO("\t\tCombining with (%s, B%u)\n",
+                                 previous->fBatch->name(), previous->fBatch->uniqueID());
                     return NULL;
                 }
 
                 if (intersect(previous->fBatch->bounds(), batch->bounds())) {
+                    GrBATCH_INFO("\t\tIntersects with (%s, B%u)\n",
+                                 previous->fBatch->name(), previous->fBatch->uniqueID());
                     break;
                 }
             } else if (Cmd::kClear_CmdType == reverseIter->type()) {
                 Clear* previous = static_cast<Clear*>(reverseIter.get());
 
                 // We cannot continue to search backwards if the render target changes
                 if (previous->renderTarget() != rt) {
+                    GrBATCH_INFO("\t\tBreaking because of Clear's Rendertarget change\n");
                     break;
                 }
 
                 // We set the color to illegal if we are doing a discard.
                 if (previous->fColor == GrColor_ILLEGAL ||
                     intersect(batch->bounds(), previous->fRect)) {
+                    GrBATCH_INFO("\t\tBreaking because of Clear intersection\n");
                     break;
                 }
             } else {
+                GrBATCH_INFO("\t\tBreaking because of other %08x\n", reverseIter->type());
                 // TODO temporary until we can navigate the other types of commands
                 break;
             }
         } while (reverseIter.previous() && ++i < kMaxLookback);
+#if GR_BATCH_SPEW
+        if (!reverseIter.get()) {
+            GrBATCH_INFO("\t\tNo more commands to try and batch with\n");
+        } else if (i >= kMaxLookback) {
+            GrBATCH_INFO("\t\tReached max lookback %d\n", i);
+        }
+#endif
     }
+#if GR_BATCH_SPEW
+    else {
+        GrBATCH_INFO("\t\tBreaking because empty command buffer\n");
+    }
+#endif
 
     return GrNEW_APPEND_TO_RECORDER(*this->cmdBuffer(), DrawBatch, (state, batch,
                                                                     this->batchTarget()));
 }