Add a GrPathRange class

src/gpu/gl/GrGLPathRange.cpp

Index: src/gpu/gl/GrGLPathRange.cpp
diff --git a/src/gpu/gl/GrGLPathRange.cpp b/src/gpu/gl/GrGLPathRange.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..833326c6a0eef0879051cabe46fa1cc8e6db37f9
--- /dev/null
+++ b/src/gpu/gl/GrGLPathRange.cpp
@@ -0,0 +1,64 @@
+
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "GrGLPathRange.h"
+#include "GrGLPath.h"
+#include "GrGpuGL.h"
+
+#define GPUGL static_cast<GrGpuGL*>(this->getGpu())
+
+#define GL_CALL(X) GR_GL_CALL(GPUGL->glInterface(), X)
+#define GL_CALL_RET(R, X) GR_GL_CALL_RET(GPUGL->glInterface(), R, X)
+
+static const bool kIsWrapped = false; // The constructor creates the GL path objects.
+
+GrGLPathRange::GrGLPathRange(GrGpu* gpu, size_t size, const SkStrokeRec& stroke)
+    : INHERITED(gpu, kIsWrapped, size, stroke),
+      fNumDefinedPaths(0) {
+    GL_CALL_RET(fBasePathID, GenPaths(fSize));
+}
+
+GrGLPathRange::~GrGLPathRange() {
+    this->release();
+}
+
+void GrGLPathRange::initAt(size_t index, const SkPath& skPath) {
+    GrGpuGL* gpu = static_cast<GrGpuGL*>(this->getGpu());
+    if (NULL == gpu) {
+        return;
+    }
+
+#ifdef SK_DEBUG
+    // Make sure the path at this index hasn't been initted already.
+    bool hasPathAtIndex;
+    GL_CALL_RET(hasPathAtIndex, IsPath(fBasePathID + index));
+    SkASSERT(!hasPathAtIndex);
+#endif
+
+    GrGLPath::InitPathObject(gpu->glInterface(), fBasePathID + index, skPath, fStroke);
+
+    ++fNumDefinedPaths;
+    this->didChangeGpuMemorySize();
+}
+
+void GrGLPathRange::onRelease() {
+    SkASSERT(NULL != this->getGpu());
+
+    if (0 != fBasePathID && !this->isWrapped()) {
+        GL_CALL(DeletePaths(fBasePathID, fSize));
+        fBasePathID = 0;
+    }
+
+    INHERITED::onRelease();
+}
+
+void GrGLPathRange::onAbandon() {
+    fBasePathID = 0;
+
+    INHERITED::onAbandon();
+}