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/*
* AltiVec optimizations for libjpeg-turbo
*
* Copyright (C) 2014, D. R. Commander. All Rights Reserved.
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
* 3. This notice may not be removed or altered from any source distribution.
*/
/* RGB --> GRAYSCALE CONVERSION */
#include "jsimd_altivec.h"
#define F_0_114 7471 /* FIX(0.11400) */
#define F_0_250 16384 /* FIX(0.25000) */
#define F_0_299 19595 /* FIX(0.29900) */
#define F_0_587 38470 /* FIX(0.58700) */
#define F_0_337 (F_0_587 - F_0_250) /* FIX(0.58700) - FIX(0.25000) */
#define SCALEBITS 16
#define ONE_HALF (1 << (SCALEBITS - 1))
#define RGBG_INDEX0 \
{ 0, 1, 3, 4, 6, 7, 9, 10, 2, 1, 5, 4, 8, 7, 11, 10 }
#define RGBG_INDEX1 \
{ 12, 13, 15, 16, 18, 19, 21, 22, 14, 13, 17, 16, 20, 19, 23, 22 }
#define RGBG_INDEX2 \
{ 8, 9, 11, 12, 14, 15, 17, 18, 10, 9, 13, 12, 16, 15, 19, 18 }
#define RGBG_INDEX3 \
{ 4, 5, 7, 8, 10, 11, 13, 14, 6, 5, 9, 8, 12, 11, 15, 14 }
#include "jcgryext-altivec.c"
#undef RGB_PIXELSIZE
#define RGB_PIXELSIZE EXT_RGB_PIXELSIZE
#define jsimd_rgb_gray_convert_altivec jsimd_extrgb_gray_convert_altivec
#include "jcgryext-altivec.c"
#undef RGB_PIXELSIZE
#undef RGBG_INDEX0
#undef RGBG_INDEX1
#undef RGBG_INDEX2
#undef RGBG_INDEX3
#undef jsimd_rgb_gray_convert_altivec
#define RGB_PIXELSIZE EXT_RGBX_PIXELSIZE
#define RGBG_INDEX \
{ 0, 1, 4, 5, 8, 9, 12, 13, 2, 1, 6, 5, 10, 9, 14, 13 }
#define jsimd_rgb_gray_convert_altivec jsimd_extrgbx_gray_convert_altivec
#include "jcgryext-altivec.c"
#undef RGB_PIXELSIZE
#undef RGBG_INDEX
#undef jsimd_rgb_gray_convert_altivec
#define RGB_PIXELSIZE EXT_BGR_PIXELSIZE
#define RGBG_INDEX0 \
{ 2, 1, 5, 4, 8, 7, 11, 10, 0, 1, 3, 4, 6, 7, 9, 10 }
#define RGBG_INDEX1 \
{ 14, 13, 17, 16, 20, 19, 23, 22, 12, 13, 15, 16, 18, 19, 21, 22 }
#define RGBG_INDEX2 \
{ 10, 9, 13, 12, 16, 15, 19, 18, 8, 9, 11, 12, 14, 15, 17, 18 }
#define RGBG_INDEX3 \
{ 6, 5, 9, 8, 12, 11, 15, 14, 4, 5, 7, 8, 10, 11, 13, 14 }
#define jsimd_rgb_gray_convert_altivec jsimd_extbgr_gray_convert_altivec
#include "jcgryext-altivec.c"
#undef RGB_PIXELSIZE
#undef RGBG_INDEX0
#undef RGBG_INDEX1
#undef RGBG_INDEX2
#undef RGBG_INDEX3
#undef jsimd_rgb_gray_convert_altivec
#define RGB_PIXELSIZE EXT_BGRX_PIXELSIZE
#define RGBG_INDEX \
{ 2, 1, 6, 5, 10, 9, 14, 13, 0, 1, 4, 5, 8, 9, 12, 13 }
#define jsimd_rgb_gray_convert_altivec jsimd_extbgrx_gray_convert_altivec
#include "jcgryext-altivec.c"
#undef RGB_PIXELSIZE
#undef RGBG_INDEX
#undef jsimd_rgb_gray_convert_altivec
#define RGB_PIXELSIZE EXT_XBGR_PIXELSIZE
#define RGBG_INDEX \
{ 3, 2, 7, 6, 11, 10, 15, 14, 1, 2, 5, 6, 9, 10, 13, 14 }
#define jsimd_rgb_gray_convert_altivec jsimd_extxbgr_gray_convert_altivec
#include "jcgryext-altivec.c"
#undef RGB_PIXELSIZE
#undef RGBG_INDEX
#undef jsimd_rgb_gray_convert_altivec
#define RGB_PIXELSIZE EXT_XRGB_PIXELSIZE
#define RGBG_INDEX \
{ 1, 2, 5, 6, 9, 10, 13, 14, 3, 2, 7, 6, 11, 10, 15, 14 }
#define jsimd_rgb_gray_convert_altivec jsimd_extxrgb_gray_convert_altivec
#include "jcgryext-altivec.c"
#undef RGB_PIXELSIZE
#undef RGBG_INDEX
#undef jsimd_rgb_gray_convert_altivec
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