From a850dec991d7d6d28f2669a959b3198a7a796ce9 Mon Sep 17 00:00:00 2001
From: hedaoyuan <hedaoyuan@github.com>
Date: Tue, 26 Dec 2017 16:07:09 +0800
Subject: [PATCH] Add dilation.

---
 paddle/function/GemmConvOp.cpp | 2 ++
 paddle/function/Im2Col.h       | 6 ++++--
 paddle/function/Im2ColTest.cpp | 4 +++-
 3 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/paddle/function/GemmConvOp.cpp b/paddle/function/GemmConvOp.cpp
index 75a5b4fe84..acf1415ebf 100644
--- a/paddle/function/GemmConvOp.cpp
+++ b/paddle/function/GemmConvOp.cpp
@@ -233,6 +233,8 @@ public:
                      strideW(),
                      paddingH(),
                      paddingW(),
+                     dilationH(),
+                     dilationW(),
                      colHeightStart,
                      K,
                      colWidthStart,
diff --git a/paddle/function/Im2Col.h b/paddle/function/Im2Col.h
index f43ca465a2..1053e4fd23 100644
--- a/paddle/function/Im2Col.h
+++ b/paddle/function/Im2Col.h
@@ -109,6 +109,8 @@ public:
                   int strideWidth,
                   int paddingHeight,
                   int paddingWidth,
+                  int dilationHeight,
+                  int dilationWidth,
                   int colHeightStart,
                   int colHeightSize,
                   int colWidthStart,
@@ -128,8 +130,8 @@ public:
         int h = (colWidthStart + colw) / outputWidth;
         int w = (colWidthStart + colw) % outputWidth;
 
-        int imRowIdx = h * strideHeight + hOffset;
-        int imColIdx = w * strideWidth + wOffset;
+        int imRowIdx = h * strideHeight + hOffset * dilationHeight;
+        int imColIdx = w * strideWidth + wOffset * dilationWidth;
         if ((imRowIdx - paddingHeight) < 0 ||
             (imRowIdx - paddingHeight) >= inputHeight ||
             (imColIdx - paddingWidth) < 0 ||
diff --git a/paddle/function/Im2ColTest.cpp b/paddle/function/Im2ColTest.cpp
index 0dc58696f7..c573469168 100644
--- a/paddle/function/Im2ColTest.cpp
+++ b/paddle/function/Im2ColTest.cpp
@@ -147,7 +147,7 @@ void TestIm2ColMobileFunctor() {
           for (size_t filterWidth : {3, 7}) {
             for (size_t stride : {1, 2}) {
               for (size_t padding : {0, 1}) {
-                for (size_t dilation : {1 /*, 3*/}) {
+                for (size_t dilation : {1, 3}) {
                   size_t filterSizeH = (filterHeight - 1) * dilation + 1;
                   size_t filterSizeW = (filterWidth - 1) * dilation + 1;
                   if (inputHeight + 2 * padding < filterSizeH ||
@@ -200,6 +200,8 @@ void TestIm2ColMobileFunctor() {
                           stride,
                           padding,
                           padding,
+                          dilation,
+                          dilation,
                           0,
                           height,
                           0,
-- 
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