Break out SkOffsetImageFilter into its own file, and derive it from

SkSingleInputImageFilter, to make it DAG-friendly.

Review URL: https://codereview.appspot.com/6822086

git-svn-id: http://skia.googlecode.com/svn/trunk@6315 2bbb7eff-a529-9590-31e7-b0007b416f81

7 files changed, 86 insertions, 54 deletions

diff --git a/gm/testimagefilters.cpp b/gm/testimagefilters.cpp
index e046416b0f..fdf47b9d6f 100644
--- a/gm/testimagefilters.cpp
+++ b/gm/testimagefilters.cpp
@@ -13,6 +13,7 @@
 
 #include "SkBlurImageFilter.h"
 #include "SkColorFilterImageFilter.h"
+#include "SkOffsetImageFilter.h"
 #include "SkTestImageFilters.h"
 
 #define FILTER_WIDTH    SkIntToScalar(150)
diff --git a/gyp/effects.gypi b/gyp/effects.gypi
index aef7f2c126..f2a2214490 100644
--- a/gyp/effects.gypi
+++ b/gyp/effects.gypi
@@ -33,6 +33,7 @@
     '<(skia_src_path)/effects/SkLayerDrawLooper.cpp',
     '<(skia_src_path)/effects/SkLayerRasterizer.cpp',
     '<(skia_src_path)/effects/SkLightingImageFilter.cpp',
+    '<(skia_src_path)/effects/SkOffsetImageFilter.cpp',
     '<(skia_src_path)/effects/SkMatrixConvolutionImageFilter.cpp',
     '<(skia_src_path)/effects/SkMorphologyImageFilter.cpp',
     '<(skia_src_path)/effects/SkPaintFlagsDrawFilter.cpp',
@@ -86,6 +87,7 @@
     '<(skia_include_path)/effects/SkLayerDrawLooper.h',
     '<(skia_include_path)/effects/SkLayerRasterizer.h',
     '<(skia_include_path)/effects/SkLightingImageFilter.h',
+    '<(skia_include_path)/effects/SkOffsetImageFilter.h',
     '<(skia_include_path)/effects/SkMorphologyImageFilter.h',
     '<(skia_include_path)/effects/SkPaintFlagsDrawFilter.h',
     '<(skia_include_path)/effects/SkPixelXorXfermode.h',
diff --git a/include/effects/SkOffsetImageFilter.h b/include/effects/SkOffsetImageFilter.h
new file mode 100644
index 0000000000..74d6ebc191
--- /dev/null
+++ b/include/effects/SkOffsetImageFilter.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2012 The Android Open Source Project
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkOffsetImageFilter_DEFINED
+#define SkOffsetImageFilter_DEFINED
+
+#include "SkSingleInputImageFilter.h"
+#include "SkPoint.h"
+
+class SK_API SkOffsetImageFilter : public SkSingleInputImageFilter {
+public:
+    SkOffsetImageFilter(SkScalar dx, SkScalar dy, SkImageFilter* input = NULL);
+    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkOffsetImageFilter)
+
+protected:
+    SkOffsetImageFilter(SkFlattenableReadBuffer& buffer);
+    virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
+
+    virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&,
+                               SkBitmap* result, SkIPoint* loc) SK_OVERRIDE;
+    virtual bool onFilterBounds(const SkIRect&, const SkMatrix&, SkIRect*) SK_OVERRIDE;
+
+private:
+    SkVector fOffset;
+
+    typedef SkSingleInputImageFilter INHERITED;
+};
+
+#endif
diff --git a/include/effects/SkTestImageFilters.h b/include/effects/SkTestImageFilters.h
index 7e2fb91dc9..2a3178e62c 100755
--- a/include/effects/SkTestImageFilters.h
+++ b/include/effects/SkTestImageFilters.h
@@ -4,28 +4,6 @@
 #include "SkImageFilter.h"
 #include "SkPoint.h"
 
-class SK_API SkOffsetImageFilter : public SkImageFilter {
-public:
-    SkOffsetImageFilter(SkScalar dx, SkScalar dy) : INHERITED(0) {
-        fOffset.set(dx, dy);
-    }
-
-    SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkOffsetImageFilter)
-
-protected:
-    SkOffsetImageFilter(SkFlattenableReadBuffer& buffer);
-    virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
-
-    virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&,
-                               SkBitmap* result, SkIPoint* loc) SK_OVERRIDE;
-    virtual bool onFilterBounds(const SkIRect&, const SkMatrix&, SkIRect*) SK_OVERRIDE;
-
-private:
-    SkVector fOffset;
-
-    typedef SkImageFilter INHERITED;
-};
-
 class SK_API SkComposeImageFilter : public SkImageFilter {
 public:
     SkComposeImageFilter(SkImageFilter* outer, SkImageFilter* inner) : INHERITED(outer, inner) {}
diff --git a/src/effects/SkOffsetImageFilter.cpp b/src/effects/SkOffsetImageFilter.cpp
new file mode 100644
index 0000000000..fb39aa8e41
--- /dev/null
+++ b/src/effects/SkOffsetImageFilter.cpp
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2012 The Android Open Source Project
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkOffsetImageFilter.h"
+#include "SkBitmap.h"
+#include "SkMatrix.h"
+#include "SkFlattenableBuffers.h"
+
+bool SkOffsetImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& source,
+                                        const SkMatrix& matrix,
+                                        SkBitmap* result,
+                                        SkIPoint* loc) {
+    SkBitmap src = this->getInputResult(proxy, source, matrix, loc);
+    SkVector vec;
+    matrix.mapVectors(&vec, &fOffset, 1);
+
+    loc->fX += SkScalarRoundToInt(vec.fX);
+    loc->fY += SkScalarRoundToInt(vec.fY);
+    *result = src;
+    return true;
+}
+
+bool SkOffsetImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
+                                         SkIRect* dst) {
+    SkVector vec;
+    ctm.mapVectors(&vec, &fOffset, 1);
+
+    *dst = src;
+    dst->offset(SkScalarRoundToInt(vec.fX), SkScalarRoundToInt(vec.fY));
+    return true;
+}
+
+void SkOffsetImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const {
+    this->INHERITED::flatten(buffer);
+    buffer.writePoint(fOffset);
+}
+
+SkOffsetImageFilter::SkOffsetImageFilter(SkScalar dx, SkScalar dy,
+                                         SkImageFilter* input) : INHERITED(input) {
+    fOffset.set(dx, dy);
+}
+
+SkOffsetImageFilter::SkOffsetImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) {
+    buffer.readPoint(&fOffset);
+}
diff --git a/src/effects/SkTestImageFilters.cpp b/src/effects/SkTestImageFilters.cpp
index 99c80d037f..8857719afe 100755
--- a/src/effects/SkTestImageFilters.cpp
+++ b/src/effects/SkTestImageFilters.cpp
@@ -18,38 +18,6 @@ public:
     }
 };
 
-bool SkOffsetImageFilter::onFilterImage(Proxy* proxy, const SkBitmap& src,
-                                        const SkMatrix& matrix,
-                                        SkBitmap* result,
-                                        SkIPoint* loc) {
-    SkVector vec;
-    matrix.mapVectors(&vec, &fOffset, 1);
-
-    loc->fX += SkScalarRoundToInt(vec.fX);
-    loc->fY += SkScalarRoundToInt(vec.fY);
-    *result = src;
-    return true;
-}
-
-bool SkOffsetImageFilter::onFilterBounds(const SkIRect& src, const SkMatrix& ctm,
-                                         SkIRect* dst) {
-    SkVector vec;
-    ctm.mapVectors(&vec, &fOffset, 1);
-
-    *dst = src;
-    dst->offset(SkScalarRoundToInt(vec.fX), SkScalarRoundToInt(vec.fY));
-    return true;
-}
-
-void SkOffsetImageFilter::flatten(SkFlattenableWriteBuffer& buffer) const {
-    this->INHERITED::flatten(buffer);
-    buffer.writePoint(fOffset);
-}
-
-SkOffsetImageFilter::SkOffsetImageFilter(SkFlattenableReadBuffer& buffer) : INHERITED(buffer) {
-    buffer.readPoint(&fOffset);
-}
-
 ///////////////////////////////////////////////////////////////////////////////
 
 SkComposeImageFilter::~SkComposeImageFilter() {
diff --git a/src/ports/SkGlobalInitialization_default.cpp b/src/ports/SkGlobalInitialization_default.cpp
index a764dd178c..6be95a1907 100644
--- a/src/ports/SkGlobalInitialization_default.cpp
+++ b/src/ports/SkGlobalInitialization_default.cpp
@@ -39,6 +39,7 @@
 #include "SkLayerDrawLooper.h"
 #include "SkLayerRasterizer.h"
 #include "SkLightingImageFilter.h"
+#include "SkOffsetImageFilter.h"
 #include "SkMagnifierImageFilter.h"
 #include "SkMatrixConvolutionImageFilter.h"
 #include "SkMorphologyImageFilter.h"