Add GrOpList and rename GrDrawTarget to GrRenderTargetOpList

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=3910

Change-Id: I026aa26ecc61a0d002e98892dca728536259e8b1
Reviewed-on: https://skia-review.googlesource.com/3910
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Robert Phillips <robertphillips@google.com>

1 files changed, 71 insertions, 0 deletions

diff --git a/src/gpu/GrOpList.cpp b/src/gpu/GrOpList.cpp
new file mode 100644
index 0000000000..ac7f1b274d
--- /dev/null
+++ b/src/gpu/GrOpList.cpp
@@ -0,0 +1,71 @@
+/*
+ * Copyright 2016 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "GrOpList.h"
+
+#include "GrRenderTarget.h"
+#include "GrRenderTargetOpList.h"
+#include "GrSurface.h"
+
+GrOpList::GrOpList(GrSurface* surface) 
+    : fFlags(0)
+    , fTarget(surface) {
+
+    surface->setLastOpList(this);
+
+#ifdef SK_DEBUG
+    static int debugID = 0;
+    fDebugID = debugID++;
+#endif
+}
+
+GrOpList::~GrOpList() {
+    if (fTarget && this == fTarget->getLastOpList()) {
+        fTarget->setLastOpList(nullptr);
+    }
+}
+
+// Add a GrOpList-based dependency
+void GrOpList::addDependency(GrOpList* dependedOn) {
+    SkASSERT(!dependedOn->dependsOn(this));  // loops are bad
+
+    if (this->dependsOn(dependedOn)) {
+        return;  // don't add duplicate dependencies
+    }
+
+    *fDependencies.push() = dependedOn;
+}
+
+// Convert from a GrSurface-based dependency to a GrOpList one
+void GrOpList::addDependency(GrSurface* dependedOn) {
+    if (dependedOn->getLastOpList()) {
+        // If it is still receiving dependencies, this GrOpList shouldn't be closed
+        SkASSERT(!this->isClosed());
+
+        GrOpList* opList = dependedOn->getLastOpList();
+        if (opList == this) {
+            // self-read - presumably for dst reads
+        } else {
+            this->addDependency(opList);
+
+            // Can't make it closed in the self-read case
+            opList->makeClosed();
+        }
+    }
+}
+
+#ifdef SK_DEBUG
+void GrOpList::dump() const {
+    SkDebugf("--------------------------------------------------------------\n");
+    SkDebugf("node: %d -> RT: %d\n", fDebugID, fTarget ? fTarget->uniqueID() : -1);
+    SkDebugf("relies On (%d): ", fDependencies.count());
+    for (int i = 0; i < fDependencies.count(); ++i) {
+        SkDebugf("%d, ", fDependencies[i]->fDebugID);
+    }
+    SkDebugf("\n");
+}
+#endif