/* * This file is part of the Scale2x project. * * Copyright (C) 2001, 2002, 2003, 2004 Andrea Mazzoleni * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* * This file contains a C and MMX implementation of the Scale2x effect. * * You can find an high level description of the effect at : * * http://scale2x.sourceforge.net/ * * Alternatively at the previous license terms, you are allowed to use this * code in your program with these conditions: * - the program is not used in commercial activities. * - the whole source code of the program is released with the binary. * - derivative works of the program are allowed. */ #include "common/stdafx.h" #include "common/scummsys.h" #include "graphics/scaler/intern.h" #include "graphics/scaler/scale3x.h" #include <assert.h> /***************************************************************************/ /* Scale3x C implementation */ static inline void scale3x_8_def_border(scale3x_uint8* __restrict__ dst, const scale3x_uint8* __restrict__ src0, const scale3x_uint8* __restrict__ src1, const scale3x_uint8* __restrict__ src2, unsigned count) { /* central pixels */ while (count) { if (src0[0] != src2[0] && src1[-1] != src1[1]) { dst[0] = src1[-1] == src0[0] ? src1[-1] : src1[0]; dst[1] = (src1[-1] == src0[0] && src1[0] != src0[1]) || (src1[1] == src0[0] && src1[0] != src0[-1]) ? src0[0] : src1[0]; dst[2] = src1[1] == src0[0] ? src1[1] : src1[0]; } else { dst[0] = src1[0]; dst[1] = src1[0]; dst[2] = src1[0]; } ++src0; ++src1; ++src2; dst += 3; --count; } } static inline void scale3x_8_def_center(scale3x_uint8* __restrict__ dst, const scale3x_uint8* __restrict__ src0, const scale3x_uint8* __restrict__ src1, const scale3x_uint8* __restrict__ src2, unsigned count) { /* central pixels */ while (count) { if (src0[0] != src2[0] && src1[-1] != src1[1]) { dst[0] = (src1[-1] == src0[0] && src1[0] != src2[-1]) || (src1[-1] == src2[0] && src1[0] != src0[-1]) ? src1[-1] : src1[0]; dst[1] = src1[0]; dst[2] = (src1[1] == src0[0] && src1[0] != src2[1]) || (src1[1] == src2[0] && src1[0] != src0[1]) ? src1[1] : src1[0]; } else { dst[0] = src1[0]; dst[1] = src1[0]; dst[2] = src1[0]; } ++src0; ++src1; ++src2; dst += 3; --count; } } static inline void scale3x_16_def_border(scale3x_uint16* __restrict__ dst, const scale3x_uint16* __restrict__ src0, const scale3x_uint16* __restrict__ src1, const scale3x_uint16* __restrict__ src2, unsigned count) { /* central pixels */ while (count) { if (src0[0] != src2[0] && src1[-1] != src1[1]) { dst[0] = src1[-1] == src0[0] ? src1[-1] : src1[0]; dst[1] = (src1[-1] == src0[0] && src1[0] != src0[1]) || (src1[1] == src0[0] && src1[0] != src0[-1]) ? src0[0] : src1[0]; dst[2] = src1[1] == src0[0] ? src1[1] : src1[0]; } else { dst[0] = src1[0]; dst[1] = src1[0]; dst[2] = src1[0]; } ++src0; ++src1; ++src2; dst += 3; --count; } } static inline void scale3x_16_def_center(scale3x_uint16* __restrict__ dst, const scale3x_uint16* __restrict__ src0, const scale3x_uint16* __restrict__ src1, const scale3x_uint16* __restrict__ src2, unsigned count) { /* central pixels */ while (count) { if (src0[0] != src2[0] && src1[-1] != src1[1]) { dst[0] = (src1[-1] == src0[0] && src1[0] != src2[-1]) || (src1[-1] == src2[0] && src1[0] != src0[-1]) ? src1[-1] : src1[0]; dst[1] = src1[0]; dst[2] = (src1[1] == src0[0] && src1[0] != src2[1]) || (src1[1] == src2[0] && src1[0] != src0[1]) ? src1[1] : src1[0]; } else { dst[0] = src1[0]; dst[1] = src1[0]; dst[2] = src1[0]; } ++src0; ++src1; ++src2; dst += 3; --count; } } static inline void scale3x_32_def_border(scale3x_uint32* __restrict__ dst, const scale3x_uint32* __restrict__ src0, const scale3x_uint32* __restrict__ src1, const scale3x_uint32* __restrict__ src2, unsigned count) { /* central pixels */ while (count) { if (src0[0] != src2[0] && src1[-1] != src1[1]) { dst[0] = src1[-1] == src0[0] ? src1[-1] : src1[0]; dst[1] = (src1[-1] == src0[0] && src1[0] != src0[1]) || (src1[1] == src0[0] && src1[0] != src0[-1]) ? src0[0] : src1[0]; dst[2] = src1[1] == src0[0] ? src1[1] : src1[0]; } else { dst[0] = src1[0]; dst[1] = src1[0]; dst[2] = src1[0]; } ++src0; ++src1; ++src2; dst += 3; --count; } } static inline void scale3x_32_def_center(scale3x_uint32* __restrict__ dst, const scale3x_uint32* __restrict__ src0, const scale3x_uint32* __restrict__ src1, const scale3x_uint32* __restrict__ src2, unsigned count) { /* central pixels */ while (count) { if (src0[0] != src2[0] && src1[-1] != src1[1]) { dst[0] = (src1[-1] == src0[0] && src1[0] != src2[-1]) || (src1[-1] == src2[0] && src1[0] != src0[-1]) ? src1[-1] : src1[0]; dst[1] = src1[0]; dst[2] = (src1[1] == src0[0] && src1[0] != src2[1]) || (src1[1] == src2[0] && src1[0] != src0[1]) ? src1[1] : src1[0]; } else { dst[0] = src1[0]; dst[1] = src1[0]; dst[2] = src1[0]; } ++src0; ++src1; ++src2; dst += 3; --count; } } /** * Scale by a factor of 3 a row of pixels of 8 bits. * The function is implemented in C. * The pixels over the left and right borders are assumed of the same color of * the pixels on the border. * \param src0 Pointer at the first pixel of the previous row. * \param src1 Pointer at the first pixel of the current row. * \param src2 Pointer at the first pixel of the next row. * \param count Length in pixels of the src0, src1 and src2 rows. * It must be at least 2. * \param dst0 First destination row, triple length in pixels. * \param dst1 Second destination row, triple length in pixels. * \param dst2 Third destination row, triple length in pixels. */ void scale3x_8_def(scale3x_uint8* dst0, scale3x_uint8* dst1, scale3x_uint8* dst2, const scale3x_uint8* src0, const scale3x_uint8* src1, const scale3x_uint8* src2, unsigned count) { scale3x_8_def_border(dst0, src0, src1, src2, count); scale3x_8_def_center(dst1, src0, src1, src2, count); scale3x_8_def_border(dst2, src2, src1, src0, count); } /** * Scale by a factor of 3 a row of pixels of 16 bits. * This function operates like scale3x_8_def() but for 16 bits pixels. * \param src0 Pointer at the first pixel of the previous row. * \param src1 Pointer at the first pixel of the current row. * \param src2 Pointer at the first pixel of the next row. * \param count Length in pixels of the src0, src1 and src2 rows. * It must be at least 2. * \param dst0 First destination row, triple length in pixels. * \param dst1 Second destination row, triple length in pixels. * \param dst2 Third destination row, triple length in pixels. */ void scale3x_16_def(scale3x_uint16* dst0, scale3x_uint16* dst1, scale3x_uint16* dst2, const scale3x_uint16* src0, const scale3x_uint16* src1, const scale3x_uint16* src2, unsigned count) { scale3x_16_def_border(dst0, src0, src1, src2, count); scale3x_16_def_center(dst1, src0, src1, src2, count); scale3x_16_def_border(dst2, src2, src1, src0, count); } /** * Scale by a factor of 3 a row of pixels of 32 bits. * This function operates like scale3x_8_def() but for 32 bits pixels. * \param src0 Pointer at the first pixel of the previous row. * \param src1 Pointer at the first pixel of the current row. * \param src2 Pointer at the first pixel of the next row. * \param count Length in pixels of the src0, src1 and src2 rows. * It must be at least 2. * \param dst0 First destination row, triple length in pixels. * \param dst1 Second destination row, triple length in pixels. * \param dst2 Third destination row, triple length in pixels. */ void scale3x_32_def(scale3x_uint32* dst0, scale3x_uint32* dst1, scale3x_uint32* dst2, const scale3x_uint32* src0, const scale3x_uint32* src1, const scale3x_uint32* src2, unsigned count) { scale3x_32_def_border(dst0, src0, src1, src2, count); scale3x_32_def_center(dst1, src0, src1, src2, count); scale3x_32_def_border(dst2, src2, src1, src0, count); }