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