add experimental canvas pipe

git-svn-id: http://skia.googlecode.com/svn/trunk@1187 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 61 insertions, 0 deletions

diff --git a/include/pipe/SkGPipe.h b/include/pipe/SkGPipe.h
new file mode 100644
index 0000000000..5c729a2aba
--- /dev/null
+++ b/include/pipe/SkGPipe.h
@@ -0,0 +1,61 @@
+/*
+    Copyright 2011 Google Inc.
+
+    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 SkGPipe_DEFINED
+#define SkGPipe_DEFINED
+
+#include "SkWriter32.h"
+
+class SkCanvas;
+
+class SkGPipeReader {
+public:
+    SkGPipeReader(SkCanvas* target);
+    ~SkGPipeReader();
+
+    enum Status {
+        kDone_Status,   //!< no more data expected from reader
+        kEOF_Status,    //!< need more data from reader
+        kError_Status   //!< encountered error
+    };
+
+    Status playback(const void* data, size_t length);
+
+private:
+    SkCanvas*           fCanvas;
+    class SkGPipeState* fState;
+};
+
+///////////////////////////////////////////////////////////////////////////////
+
+class SkGPipeWriter {
+public:
+    SkGPipeWriter();
+    ~SkGPipeWriter();
+
+    bool isRecording() const { return NULL != fCanvas; }
+    SkCanvas* startRecording();
+    void endRecording();
+
+    size_t flatten(void* buffer);
+
+private:
+    class SkGPipeCanvas* fCanvas;
+    SkWriter32 fWriter;
+};
+
+#endif