Add PDF support for drawDevice using a form xobject.

This depends on:
http://codereview.appspot.com/2719041
http://codereview.appspot.com/2720041
http://codereview.appspot.com/2721041

Review URL: http://codereview.appspot.com/2710042

git-svn-id: http://skia.googlecode.com/svn/trunk@621 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 73 insertions, 0 deletions

diff --git a/include/pdf/SkPDFFormXObject.h b/include/pdf/SkPDFFormXObject.h
new file mode 100644
index 0000000000..288a4499e1
--- /dev/null
+++ b/include/pdf/SkPDFFormXObject.h
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef SkPDFFormXObject_DEFINED
+#define SkPDFFormXObject_DEFINED
+
+#include "SkPDFStream.h"
+#include "SkPDFTypes.h"
+#include "SkRefCnt.h"
+#include "SkString.h"
+
+class SkMatrix;
+class SkPDFDevice;
+class SkPDFCatalog;
+
+/** \class SkPDFFormXObject
+
+    A form XObject; a self containted description of graphics objects.  A form
+    XObject is basically a page object with slightly different syntax, that
+    can be drawn onto a page.
+*/
+
+// The caller could keep track of the form XObjects it creates and
+// canonicalize them, but the Skia API doesn't provide enough context to
+// automatically do it (trivially).
+class SkPDFFormXObject : public SkPDFObject {
+public:
+    /** Create a PDF form XObject. Entries for the dictionary entries are
+     *  automatically added.
+     *  @param device      The set of graphical elements on this form.
+     *  @param matrix      The mapping from user space to form space.
+     */
+    SkPDFFormXObject(SkPDFDevice* device, const SkMatrix& matrix);
+    virtual ~SkPDFFormXObject();
+
+    // The SkPDFObject interface.
+    virtual void emitObject(SkWStream* stream, SkPDFCatalog* catalog,
+                            bool indirect);
+    virtual size_t getOutputSize(SkPDFCatalog* catalog, bool indirect);
+    virtual void getResources(SkTDArray<SkPDFObject*>* resourceList);
+
+    /** Add the value to the stream dictionary with the given key.
+     *  @param key   The key for this dictionary entry.
+     *  @param value The value for this dictionary entry.
+     */
+    void insert(SkPDFName* key, SkPDFObject* value);
+
+    /** Add the value to the stream dictionary with the given key.
+     *  @param key   The text of the key for this dictionary entry.
+     *  @param value The value for this dictionary entry.
+     */
+    void insert(const char key[], SkPDFObject* value);
+
+private:
+    SkString fContent;
+    SkRefPtr<SkPDFDevice> fDevice;
+    SkRefPtr<SkPDFStream> fStream;
+};
+
+#endif