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d11126b662
--- gfx/2d/convolverLS3.cpp | 88 +++++++++++++++++++++++++++++++++++++++++++++++++ gfx/2d/convolverLS3.h | 7 ++++ 2 files changed, 95 insertions(+)
76 lines
3.5 KiB
C++
76 lines
3.5 KiB
C++
// Copyright (c) 2014-2015 The Chromium Authors. All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in
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// the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google, Inc. nor the names of its contributors
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// may be used to endorse or promote products derived from this
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// software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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// OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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// SUCH DAMAGE.
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#ifndef SKIA_EXT_CONVOLVER_LS3_H_
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#define SKIA_EXT_CONVOLVER_LS3_H_
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#include "convolver.h"
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#include <algorithm>
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#include "skia/include/core/SkTypes.h"
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namespace skia {
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// Convolves horizontally along a single row. The row data is given in
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// |src_data| and continues for the [begin, end) of the filter.
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void ConvolveHorizontally_LS3(const unsigned char* src_data,
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const ConvolutionFilter1D& filter,
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unsigned char* out_row);
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// Convolves horizontally along a single row. The row data is given in
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// |src_data| and continues for the [begin, end) of the filter.
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// Process one pixel at a time.
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void ConvolveHorizontally1_LS3(const unsigned char* src_data,
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const ConvolutionFilter1D& filter,
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unsigned char* out_row);
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// Convolves horizontally along four rows. The row data is given in
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// |src_data| and continues for the [begin, end) of the filter.
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// The algorithm is almost same as |ConvolveHorizontally_LS3|. Please
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// refer to that function for detailed comments.
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void ConvolveHorizontally4_LS3(const unsigned char* src_data[4],
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const ConvolutionFilter1D& filter,
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unsigned char* out_row[4]);
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// Does vertical convolution to produce one output row. The filter values and
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// length are given in the first two parameters. These are applied to each
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// of the rows pointed to in the |source_data_rows| array, with each row
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// being |pixel_width| wide.
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//
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// The output must have room for |pixel_width * 4| bytes.
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void ConvolveVertically_LS3(const ConvolutionFilter1D::Fixed* filter_values,
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int filter_length,
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unsigned char* const* source_data_rows,
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int pixel_width,
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unsigned char* out_row, bool has_alpha);
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} // namespace skia
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#endif // SKIA_EXT_CONVOLVER_LS3_H_
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