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-rw-r--r--include/effects/SkBicubicImageFilter.h55
1 files changed, 55 insertions, 0 deletions
diff --git a/include/effects/SkBicubicImageFilter.h b/include/effects/SkBicubicImageFilter.h
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+++ b/include/effects/SkBicubicImageFilter.h
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+/*
+ * Copyright 2013 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 SkBicubicImageFilter_DEFINED
+#define SkBicubicImageFilter_DEFINED
+
+#include "SkSingleInputImageFilter.h"
+#include "SkScalar.h"
+#include "SkSize.h"
+#include "SkPoint.h"
+
+/*! \class SkBicubicImageFilter
+ Bicubic resampling image filter. This filter does a 16-tap bicubic
+ filter using the given matrix.
+ */
+
+class SK_API SkBicubicImageFilter : public SkSingleInputImageFilter {
+public:
+ /** Construct a (scaling-only) bicubic resampling image filter.
+ @param scale How much to scale the image.
+ @param coefficients The 16 coefficients of the bicubic matrix.
+ @param input The input image filter. If NULL, the src bitmap
+ passed to filterImage() is used instead.
+ */
+
+ SkBicubicImageFilter(const SkSize& scale, const SkScalar coefficients[16], SkImageFilter* input = NULL);
+ static SkBicubicImageFilter* CreateMitchell(const SkSize& scale, SkImageFilter* input = NULL);
+ virtual ~SkBicubicImageFilter();
+
+ SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkBicubicImageFilter)
+
+protected:
+ SkBicubicImageFilter(SkFlattenableReadBuffer& buffer);
+ virtual void flatten(SkFlattenableWriteBuffer&) const SK_OVERRIDE;
+
+ virtual bool onFilterImage(Proxy*, const SkBitmap& src, const SkMatrix&,
+ SkBitmap* result, SkIPoint* loc) SK_OVERRIDE;
+
+#if SK_SUPPORT_GPU
+ virtual bool canFilterImageGPU() const SK_OVERRIDE { return true; }
+ virtual GrTexture* filterImageGPU(Proxy* proxy, GrTexture* src,
+ const SkRect& rect) SK_OVERRIDE;
+#endif
+
+private:
+ SkSize fScale;
+ SkScalar fCoefficients[16];
+ typedef SkSingleInputImageFilter INHERITED;
+};
+
+#endif