Finish splitting up fx_dib.h

After this CL, fx_dib.h only has some definitions used in multiple places.
Definitions that were of restricted usage were moved out to the corresponding
place. Includes in fx_dib were reduced, thus revealing other needed includes.

Change-Id: I3607da0af81c491256d64c0aa085225631efbdcc
Reviewed-on: https://pdfium-review.googlesource.com/3594
Commit-Queue: Nicolás Peña <npm@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>

1 files changed, 26 insertions, 0 deletions

diff --git a/core/fxge/dib/ifx_scanlinecomposer.h b/core/fxge/dib/ifx_scanlinecomposer.h
new file mode 100644
index 0000000000..4df01dda23
--- /dev/null
+++ b/core/fxge/dib/ifx_scanlinecomposer.h
@@ -0,0 +1,26 @@
+// 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_FXGE_DIB_IFX_SCANLINECOMPOSER_H_
+#define CORE_FXGE_DIB_IFX_SCANLINECOMPOSER_H_
+
+#include "core/fxge/fx_dib.h"
+
+class IFX_ScanlineComposer {
+ public:
+  virtual ~IFX_ScanlineComposer() {}
+
+  virtual void ComposeScanline(int line,
+                               const uint8_t* scanline,
+                               const uint8_t* scan_extra_alpha = nullptr) = 0;
+
+  virtual bool SetInfo(int width,
+                       int height,
+                       FXDIB_Format src_format,
+                       uint32_t* pSrcPalette) = 0;
+};
+
+#endif  // CORE_FXGE_DIB_IFX_SCANLINECOMPOSER_H_