From c07379d6b1a02ddbf1a5fd9518696b3737067532 Mon Sep 17 00:00:00 2001
From: joshualitt <joshualitt@chromium.org>
Date: Thu, 20 Nov 2014 14:50:39 -0800
Subject: Adding GeometryData object

BUG=skia:

Review URL: https://codereview.chromium.org/745663002
---
 gyp/gpu.gypi                  |  1 +
 src/gpu/GrGeometryData.h      | 42 ++++++++++++++++++++++++++++++++++++++++++
 src/gpu/GrGeometryProcessor.h |  1 +
 src/gpu/GrProcessor.cpp       | 15 +++++++++++++++
 4 files changed, 59 insertions(+)
 create mode 100644 src/gpu/GrGeometryData.h

diff --git a/gyp/gpu.gypi b/gyp/gpu.gypi
index c019b12ea5..4690f62fc2 100644
--- a/gyp/gpu.gypi
+++ b/gyp/gpu.gypi
@@ -83,6 +83,7 @@
       '<(skia_src_path)/gpu/GrFontScaler.cpp',
       '<(skia_src_path)/gpu/GrFontScaler.h',
       '<(skia_src_path)/gpu/GrGeometryBuffer.h',
+      '<(skia_src_path)/gpu/GrGeometryData.h',
       '<(skia_src_path)/gpu/GrGeometryProcessor.h',
       '<(skia_src_path)/gpu/GrGlyph.h',
       '<(skia_src_path)/gpu/GrGpu.cpp',
diff --git a/src/gpu/GrGeometryData.h b/src/gpu/GrGeometryData.h
new file mode 100644
index 0000000000..a4e9fe6871
--- /dev/null
+++ b/src/gpu/GrGeometryData.h
@@ -0,0 +1,42 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef GrGeometryData_DEFINED
+#define GrGeometryData_DEFINED
+
+#include <new>
+#include "SkTypes.h"
+
+/*
+ * A super lightweight base class for GeometryProcessor's to use to store draw data in a reorderable
+ * fashion.  Its most important feature is a pool allocator.  Its virtual, but only so subclasses
+ * will have their destructors called.
+ */
+
+class GrGeometryData : SkNoncopyable {
+public:
+    virtual ~GrGeometryData() {}
+
+    /**
+      * Helper for down-casting to a GrGeometryData subclass
+      */
+    template <typename T> const T& cast() const { return *static_cast<const T*>(this); }
+
+    void* operator new(size_t size);
+
+    void operator delete(void* target);
+
+    void* operator new(size_t size, void* placement) {
+        return ::operator new(size, placement);
+    }
+
+    void operator delete(void* target, void* placement) {
+        ::operator delete(target, placement);
+    }
+};
+
+#endif
diff --git a/src/gpu/GrGeometryProcessor.h b/src/gpu/GrGeometryProcessor.h
index 01401ae797..6d27f0b4f1 100644
--- a/src/gpu/GrGeometryProcessor.h
+++ b/src/gpu/GrGeometryProcessor.h
@@ -8,6 +8,7 @@
 #ifndef GrGeometryProcessor_DEFINED
 #define GrGeometryProcessor_DEFINED
 
+#include "GrGeometryData.h"
 #include "GrProcessor.h"
 #include "GrShaderVar.h"
 
diff --git a/src/gpu/GrProcessor.cpp b/src/gpu/GrProcessor.cpp
index 01071dabfd..d850d6894a 100644
--- a/src/gpu/GrProcessor.cpp
+++ b/src/gpu/GrProcessor.cpp
@@ -9,6 +9,7 @@
 #include "GrBackendProcessorFactory.h"
 #include "GrContext.h"
 #include "GrCoordTransform.h"
+#include "GrGeometryData.h"
 #include "GrInvariantOutput.h"
 #include "GrMemoryPool.h"
 #include "SkTLS.h"
@@ -152,3 +153,17 @@ bool GrFragmentProcessor::hasSameTransforms(const GrFragmentProcessor& that) con
     }
     return true;
 }
+
+///////////////////////////////////////////////////////////////////////////////////////////////////
+
+/*
+ * GrGeometryData shares the same pool so it lives in this file too
+ */
+void* GrGeometryData::operator new(size_t size) {
+    return GrProcessor_Globals::GetTLS()->allocate(size);
+}
+
+void GrGeometryData::operator delete(void* target) {
+    GrProcessor_Globals::GetTLS()->release(target);
+}
+
-- 
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