From fd0ec2c76a27ce26a62da23eb75017839959e7cb Mon Sep 17 00:00:00 2001 From: "senorblanco@chromium.org" Date: Tue, 25 Mar 2014 17:35:10 +0000 Subject: Implement a generic matrix transform image filter. This will be used in Blink to accommodate matrices that contain rotation or shearing. This is a generalization of SkResizeImageFilter, so I've replaced all uses of SkResizeImageFilter in Skia. (It might be easier to review by diffing it with SkResizeImageFilter, too.) R=reed@google.com Review URL: https://codereview.chromium.org/211103006 git-svn-id: http://skia.googlecode.com/svn/trunk@13941 2bbb7eff-a529-9590-31e7-b0007b416f81 --- include/effects/SkMatrixImageFilter.h | 58 +++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 include/effects/SkMatrixImageFilter.h (limited to 'include/effects/SkMatrixImageFilter.h') diff --git a/include/effects/SkMatrixImageFilter.h b/include/effects/SkMatrixImageFilter.h new file mode 100644 index 0000000000..004c6ef9ed --- /dev/null +++ b/include/effects/SkMatrixImageFilter.h @@ -0,0 +1,58 @@ +/* + * Copyright 2014 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 SkMatrixImageFilter_DEFINED +#define SkMatrixImageFilter_DEFINED + +#include "SkImageFilter.h" +#include "SkScalar.h" +#include "SkSize.h" +#include "SkPoint.h" +#include "SkPaint.h" + +/*! \class SkMatrixImageFilter + Matrix transformation image filter. This filter draws its source + input transformed by the given matrix. + */ + +class SK_API SkMatrixImageFilter : public SkImageFilter { +public: + /** Construct a 2D transformation image filter. + * @param transform The matrix to apply when drawing the src bitmap + * @param filterLevel The quality of filtering to apply when scaling. + * @param input The input image filter. If NULL, the src bitmap + * passed to filterImage() is used instead. + */ + + static SkMatrixImageFilter* Create(const SkMatrix& transform, + SkPaint::FilterLevel, + SkImageFilter* input = NULL); + virtual ~SkMatrixImageFilter(); + + virtual void computeFastBounds(const SkRect&, SkRect*) const SK_OVERRIDE; + + SK_DECLARE_PUBLIC_FLATTENABLE_DESERIALIZATION_PROCS(SkMatrixImageFilter) + +protected: + SkMatrixImageFilter(const SkMatrix& transform, + SkPaint::FilterLevel, + SkImageFilter* input = NULL); + SkMatrixImageFilter(SkReadBuffer& buffer); + virtual void flatten(SkWriteBuffer&) const SK_OVERRIDE; + + virtual bool onFilterImage(Proxy*, const SkBitmap& src, const Context&, + SkBitmap* result, SkIPoint* loc) const SK_OVERRIDE; + virtual bool onFilterBounds(const SkIRect& src, const SkMatrix&, + SkIRect* dst) const SK_OVERRIDE; + +private: + SkMatrix fTransform; + SkPaint::FilterLevel fFilterLevel; + typedef SkImageFilter INHERITED; +}; + +#endif -- cgit v1.2.3