Create virtual codec APIs so chrome/fuzzers can link separately

The one step to make an actual concrete class is conditionalized
in fpdfview and is unconditional in the fuzzer.

Also replace the clumsy C-style callbacks with a delegate
interface as long as we are making new interfaces.

Change-Id: I733a437483ce5e0c34211cfbbda05105336f55b5
Reviewed-on: https://pdfium-review.googlesource.com/2887
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>

1 files changed, 36 insertions, 0 deletions

diff --git a/core/fxcodec/codec/icodec_tiffmodule.h b/core/fxcodec/codec/icodec_tiffmodule.h
new file mode 100644
index 0000000000..540d82ff63
--- /dev/null
+++ b/core/fxcodec/codec/icodec_tiffmodule.h
@@ -0,0 +1,36 @@
+// Copyright 2017 PDFium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
+
+#ifndef CORE_FXCODEC_CODEC_ICODEC_TIFFMODULE_H_
+#define CORE_FXCODEC_CODEC_ICODEC_TIFFMODULE_H_
+
+#include "core/fxcrt/cfx_retain_ptr.h"
+#include "core/fxcrt/fx_system.h"
+
+class CCodec_TiffContext;
+class CFX_DIBAttribute;
+class CFX_DIBitmap;
+class IFX_SeekableReadStream;
+
+class ICodec_TiffModule {
+ public:
+  virtual ~ICodec_TiffModule() {}
+
+  virtual CCodec_TiffContext* CreateDecoder(
+      const CFX_RetainPtr<IFX_SeekableReadStream>& file_ptr) = 0;
+  virtual bool LoadFrameInfo(CCodec_TiffContext* ctx,
+                             int32_t frame,
+                             int32_t* width,
+                             int32_t* height,
+                             int32_t* comps,
+                             int32_t* bpc,
+                             CFX_DIBAttribute* pAttribute) = 0;
+  virtual bool Decode(CCodec_TiffContext* ctx,
+                      class CFX_DIBitmap* pDIBitmap) = 0;
+  virtual void DestroyDecoder(CCodec_TiffContext* ctx) = 0;
+};
+
+#endif  // CORE_FXCODEC_CODEC_ICODEC_TIFFMODULE_H_