1 files changed, 74 insertions, 0 deletions
diff --git a/core/fxge/dib/cfx_scanlinecompositor.h b/core/fxge/dib/cfx_scanlinecompositor.h
new file mode 100644
index 0000000000..2401bc5da8
--- /dev/null
+++ b/core/fxge/dib/cfx_scanlinecompositor.h
@@ -0,0 +1,74 @@
+// 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_CFX_SCANLINECOMPOSITOR_H_
+#define CORE_FXGE_DIB_CFX_SCANLINECOMPOSITOR_H_
+
+#include "core/fxge/dib/cfx_dibsource.h"
+
+class CFX_ScanlineCompositor {
+ public:
+  CFX_ScanlineCompositor();
+
+  ~CFX_ScanlineCompositor();
+
+  bool Init(FXDIB_Format dest_format,
+            FXDIB_Format src_format,
+            int32_t width,
+            uint32_t* pSrcPalette,
+            uint32_t mask_color,
+            int blend_type,
+            bool bClip,
+            bool bRgbByteOrder = false,
+            int alpha_flag = 0,
+            void* pIccTransform = nullptr);
+
+  void CompositeRgbBitmapLine(uint8_t* dest_scan,
+                              const uint8_t* src_scan,
+                              int width,
+                              const uint8_t* clip_scan,
+                              const uint8_t* src_extra_alpha = nullptr,
+                              uint8_t* dst_extra_alpha = nullptr);
+
+  void CompositePalBitmapLine(uint8_t* dest_scan,
+                              const uint8_t* src_scan,
+                              int src_left,
+                              int width,
+                              const uint8_t* clip_scan,
+                              const uint8_t* src_extra_alpha = nullptr,
+                              uint8_t* dst_extra_alpha = nullptr);
+
+  void CompositeByteMaskLine(uint8_t* dest_scan,
+                             const uint8_t* src_scan,
+                             int width,
+                             const uint8_t* clip_scan,
+                             uint8_t* dst_extra_alpha = nullptr);
+
+  void CompositeBitMaskLine(uint8_t* dest_scan,
+                            const uint8_t* src_scan,
+                            int src_left,
+                            int width,
+                            const uint8_t* clip_scan,
+                            uint8_t* dst_extra_alpha = nullptr);
+
+ private:
+  int m_Transparency;
+  FXDIB_Format m_SrcFormat;
+  FXDIB_Format m_DestFormat;
+  uint32_t* m_pSrcPalette;
+  int m_MaskAlpha;
+  int m_MaskRed;
+  int m_MaskGreen;
+  int m_MaskBlue;
+  int m_MaskBlack;
+  int m_BlendType;
+  void* m_pIccTransform;
+  uint8_t* m_pCacheScanline;
+  int m_CacheSize;
+  bool m_bRgbByteOrder;
+};
+
+#endif  // CORE_FXGE_DIB_CFX_SCANLINECOMPOSITOR_H_