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snes9x/filter/hq2x.cpp

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/*
* Copyright (c) 2014 Clément Bœsch
*
* This file is part of FFmpeg.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/**
* @file
* hqx magnification filters (hq2x, hq3x, hq4x)
*
* Originally designed by Maxim Stephin.
*
* @see http://en.wikipedia.org/wiki/Hqx
* @see http://web.archive.org/web/20131114143602/http://www.hiend3d.com/hq3x.html
* @see http://blog.pkh.me/p/19-butchering-hqx-scaling-filters.html
*/
/* Modified to 16-bit R5G6B5 for Snes9x */
#include <cstdlib>
#include <cstdint>
static uint32_t yuvtable[65536];
static void init()
{
static bool initialized = false;
if (initialized)
return;
initialized = true;
// YUV table generation public domain from nall by near
for (unsigned i = 0; i < 65536; i++)
{
uint8_t R = (i >> 0) & 31;
uint8_t G = (i >> 5) & 31;
uint8_t B = (i >> 11) & 31;
// bgr565->bgr888
double r = (R << 3) | (R >> 2);
double g = (G << 2) | (G >> 4);
double b = (B << 3) | (B >> 2);
// bgr888->yuv888
double y = (r + g + b) * (0.25f * (63.5f / 48.0f));
double u = ((r - b) * 0.25f + 128.0f) * (7.5f / 7.0f);
double v = ((g * 2.0f - r - b) * 0.125f + 128.0f) * (7.5f / 6.0f);
yuvtable[i] = ((unsigned)y << 16) + ((unsigned)u << 8) + ((unsigned)v);
}
}
static inline uint32_t rgb2yuv(const uint32_t *table, uint16_t color)
{
return (table[color]);
}
static inline int yuv_diff(uint32_t yuv1, uint32_t yuv2)
{
#define YMASK 0xff0000
#define UMASK 0x00ff00
#define VMASK 0x0000ff
#define ABSDIFF(a, b) (abs((int)(a) - (int)(b)))
return ABSDIFF(yuv1 & YMASK, yuv2 & YMASK) > (48 << 16) ||
ABSDIFF(yuv1 & UMASK, yuv2 & UMASK) > (7 << 8) ||
ABSDIFF(yuv1 & VMASK, yuv2 & VMASK) > (6 << 0);
}
static inline uint32_t interp_2px(uint16_t c1, int w1, uint16_t c2, int w2, int s)
{
return (((((c1 & 0x07e0) >> 5) * w1 + ((c2 & 0x07e0) >> 5) * w2) << (5 - s)) & 0x07e0) |
(((((c1 & 0xf81f)) * w1 + ((c2 & 0xf81f)) * w2) >> s) & 0xf81f);
}
static inline uint32_t interp_3px(uint16_t c1, int w1, uint16_t c2, int w2, uint16_t c3, int w3, int s)
{
return (((((c1 & 0x07e0) >> 5) * w1 + ((c2 & 0x07e0) >> 5) * w2 + ((c3 & 0x07e0) >> 5) * w3) << (5 - s)) & 0x07e0) |
(((((c1 & 0xf81f)) * w1 + ((c2 & 0xf81f)) * w2 + ((c3 & 0xf81f)) * w3) >> s) & 0xf81f);
}
/* m is the mask of diff with the center pixel that matters in the pattern, and
* r is the expected result (bit set to 1 if there is difference with the
* center, 0 otherwise) */
#define P(m, r) ((k_shuffled & (m)) == (r))
/* adjust 012345678 to 01235678: the mask doesn't contain the (null) diff
* between the center/current pixel and itself */
#define DROP4(z) ((z) > 4 ? (z)-1 : (z))
/* shuffle the input mask: move bit n (4-adjusted) to position stored in p<n> */
#define SHF(x, rot, n) (((x) >> ((rot) ? 7 - DROP4(n) : DROP4(n)) & 1) << DROP4(p##n))
/* used to check if there is YUV difference between 2 pixels */
#define WDIFF(c1, c2) yuv_diff(rgb2yuv(r2y, c1), rgb2yuv(r2y, c2))
/* bootstrap template for every interpolation code. It defines the shuffled
* masks and surrounding pixels. The rot flag is used to indicate if it's a
* rotation; its basic effect is to shuffle k using p8..p0 instead of p0..p8 */
#define INTERP_BOOTSTRAP(rot) \
const int k_shuffled = SHF(k, rot, 0) | SHF(k, rot, 1) | SHF(k, rot, 2) | SHF(k, rot, 3) | 0 | SHF(k, rot, 5) | SHF(k, rot, 6) | SHF(k, rot, 7) | SHF(k, rot, 8); \
\
const uint32_t w0 = w[p0], w1 = w[p1], \
w3 = w[p3], w4 = w[p4], w5 = w[p5], \
w7 = w[p7]
/* Assuming p0..p8 is mapped to pixels 0..8, this function interpolates the
* top-left pixel in the total of the 2x2 pixels to interpolates. The function
* is also used for the 3 other pixels */
static inline uint32_t hq2x_interp_1x1(const uint32_t *r2y, int k,
const uint16_t *w,
int p0, int p1, int p2,
int p3, int p4, int p5,
int p6, int p7, int p8)
{
INTERP_BOOTSTRAP(0);
if ((P(0xbf, 0x37) || P(0xdb, 0x13)) && WDIFF(w1, w5))
return interp_2px(w4, 3, w3, 1, 2);
if ((P(0xdb, 0x49) || P(0xef, 0x6d)) && WDIFF(w7, w3))
return interp_2px(w4, 3, w1, 1, 2);
if ((P(0x0b, 0x0b) || P(0xfe, 0x4a) || P(0xfe, 0x1a)) && WDIFF(w3, w1))
return w4;
if ((P(0x6f, 0x2a) || P(0x5b, 0x0a) || P(0xbf, 0x3a) || P(0xdf, 0x5a) ||
P(0x9f, 0x8a) || P(0xcf, 0x8a) || P(0xef, 0x4e) || P(0x3f, 0x0e) ||
P(0xfb, 0x5a) || P(0xbb, 0x8a) || P(0x7f, 0x5a) || P(0xaf, 0x8a) ||
P(0xeb, 0x8a)) &&
WDIFF(w3, w1))
return interp_2px(w4, 3, w0, 1, 2);
if (P(0x0b, 0x08))
return interp_3px(w4, 2, w0, 1, w1, 1, 2);
if (P(0x0b, 0x02))
return interp_3px(w4, 2, w0, 1, w3, 1, 2);
if (P(0x2f, 0x2f))
return interp_3px(w4, 14, w3, 1, w1, 1, 4);
if (P(0xbf, 0x37) || P(0xdb, 0x13))
return interp_3px(w4, 5, w1, 2, w3, 1, 3);
if (P(0xdb, 0x49) || P(0xef, 0x6d))
return interp_3px(w4, 5, w3, 2, w1, 1, 3);
if (P(0x1b, 0x03) || P(0x4f, 0x43) || P(0x8b, 0x83) || P(0x6b, 0x43))
return interp_2px(w4, 3, w3, 1, 2);
if (P(0x4b, 0x09) || P(0x8b, 0x89) || P(0x1f, 0x19) || P(0x3b, 0x19))
return interp_2px(w4, 3, w1, 1, 2);
if (P(0x7e, 0x2a) || P(0xef, 0xab) || P(0xbf, 0x8f) || P(0x7e, 0x0e))
return interp_3px(w4, 2, w3, 3, w1, 3, 3);
if (P(0xfb, 0x6a) || P(0x6f, 0x6e) || P(0x3f, 0x3e) || P(0xfb, 0xfa) ||
P(0xdf, 0xde) || P(0xdf, 0x1e))
return interp_2px(w4, 3, w0, 1, 2);
if (P(0x0a, 0x00) || P(0x4f, 0x4b) || P(0x9f, 0x1b) || P(0x2f, 0x0b) ||
P(0xbe, 0x0a) || P(0xee, 0x0a) || P(0x7e, 0x0a) || P(0xeb, 0x4b) ||
P(0x3b, 0x1b))
return interp_3px(w4, 2, w3, 1, w1, 1, 2);
return interp_3px(w4, 6, w3, 1, w1, 1, 3);
}
/* Assuming p0..p8 is mapped to pixels 0..8, this function interpolates the
* top-left and top-center pixel in the total of the 3x3 pixels to
* interpolates. The function is also used for the 3 other couples of pixels
* defining the outline. The center pixel is not defined through this function,
* since it's just the same as the original value. */
static inline void hq3x_interp_2x1(uint16_t *dst, int dst_linesize,
const uint32_t *r2y, int k,
const uint16_t *w,
int pos00, int pos01,
int p0, int p1, int p2,
int p3, int p4, int p5,
int p6, int p7, int p8,
int rotate)
{
INTERP_BOOTSTRAP(rotate);
uint16_t *dst00 = &dst[dst_linesize * (pos00 >> 1) + (pos00 & 1)];
uint16_t *dst01 = &dst[dst_linesize * (pos01 >> 1) + (pos01 & 1)];
if ((P(0xdb, 0x49) || P(0xef, 0x6d)) && WDIFF(w7, w3))
*dst00 = interp_2px(w4, 3, w1, 1, 2);
else if ((P(0xbf, 0x37) || P(0xdb, 0x13)) && WDIFF(w1, w5))
*dst00 = interp_2px(w4, 3, w3, 1, 2);
else if ((P(0x0b, 0x0b) || P(0xfe, 0x4a) || P(0xfe, 0x1a)) && WDIFF(w3, w1))
*dst00 = w4;
else if ((P(0x6f, 0x2a) || P(0x5b, 0x0a) || P(0xbf, 0x3a) || P(0xdf, 0x5a) ||
P(0x9f, 0x8a) || P(0xcf, 0x8a) || P(0xef, 0x4e) || P(0x3f, 0x0e) ||
P(0xfb, 0x5a) || P(0xbb, 0x8a) || P(0x7f, 0x5a) || P(0xaf, 0x8a) ||
P(0xeb, 0x8a)) &&
WDIFF(w3, w1))
*dst00 = interp_2px(w4, 3, w0, 1, 2);
else if (P(0x4b, 0x09) || P(0x8b, 0x89) || P(0x1f, 0x19) || P(0x3b, 0x19))
*dst00 = interp_2px(w4, 3, w1, 1, 2);
else if (P(0x1b, 0x03) || P(0x4f, 0x43) || P(0x8b, 0x83) || P(0x6b, 0x43))
*dst00 = interp_2px(w4, 3, w3, 1, 2);
else if (P(0x7e, 0x2a) || P(0xef, 0xab) || P(0xbf, 0x8f) || P(0x7e, 0x0e))
*dst00 = interp_2px(w3, 1, w1, 1, 1);
else if (P(0x4f, 0x4b) || P(0x9f, 0x1b) || P(0x2f, 0x0b) || P(0xbe, 0x0a) ||
P(0xee, 0x0a) || P(0x7e, 0x0a) || P(0xeb, 0x4b) || P(0x3b, 0x1b))
*dst00 = interp_3px(w4, 2, w3, 7, w1, 7, 4);
else if (P(0x0b, 0x08) || P(0xf9, 0x68) || P(0xf3, 0x62) || P(0x6d, 0x6c) ||
P(0x67, 0x66) || P(0x3d, 0x3c) || P(0x37, 0x36) || P(0xf9, 0xf8) ||
P(0xdd, 0xdc) || P(0xf3, 0xf2) || P(0xd7, 0xd6) || P(0xdd, 0x1c) ||
P(0xd7, 0x16) || P(0x0b, 0x02))
*dst00 = interp_2px(w4, 3, w0, 1, 2);
else
*dst00 = interp_3px(w4, 2, w3, 1, w1, 1, 2);
if ((P(0xfe, 0xde) || P(0x9e, 0x16) || P(0xda, 0x12) || P(0x17, 0x16) ||
P(0x5b, 0x12) || P(0xbb, 0x12)) &&
WDIFF(w1, w5))
*dst01 = w4;
else if ((P(0x0f, 0x0b) || P(0x5e, 0x0a) || P(0xfb, 0x7b) || P(0x3b, 0x0b) ||
P(0xbe, 0x0a) || P(0x7a, 0x0a)) &&
WDIFF(w3, w1))
*dst01 = w4;
else if (P(0xbf, 0x8f) || P(0x7e, 0x0e) || P(0xbf, 0x37) || P(0xdb, 0x13))
*dst01 = interp_2px(w1, 3, w4, 1, 2);
else if (P(0x02, 0x00) || P(0x7c, 0x28) || P(0xed, 0xa9) || P(0xf5, 0xb4) ||
P(0xd9, 0x90))
*dst01 = interp_2px(w4, 3, w1, 1, 2);
else if (P(0x4f, 0x4b) || P(0xfb, 0x7b) || P(0xfe, 0x7e) || P(0x9f, 0x1b) ||
P(0x2f, 0x0b) || P(0xbe, 0x0a) || P(0x7e, 0x0a) || P(0xfb, 0x4b) ||
P(0xfb, 0xdb) || P(0xfe, 0xde) || P(0xfe, 0x56) || P(0x57, 0x56) ||
P(0x97, 0x16) || P(0x3f, 0x1e) || P(0xdb, 0x12) || P(0xbb, 0x12))
*dst01 = interp_2px(w4, 7, w1, 1, 3);
else
*dst01 = w4;
}
/* Assuming p0..p8 is mapped to pixels 0..8, this function interpolates the
* top-left block of 2x2 pixels in the total of the 4x4 pixels (or 4 blocks) to
* interpolates. The function is also used for the 3 other blocks of 2x2
* pixels. */
static inline void hq4x_interp_2x2(uint16_t *dst, int dst_linesize,
const uint32_t *r2y, int k,
const uint16_t *w,
int pos00, int pos01,
int pos10, int pos11,
int p0, int p1, int p2,
int p3, int p4, int p5,
int p6, int p7, int p8)
{
INTERP_BOOTSTRAP(0);
uint16_t *dst00 = &dst[dst_linesize * (pos00 >> 1) + (pos00 & 1)];
uint16_t *dst01 = &dst[dst_linesize * (pos01 >> 1) + (pos01 & 1)];
uint16_t *dst10 = &dst[dst_linesize * (pos10 >> 1) + (pos10 & 1)];
uint16_t *dst11 = &dst[dst_linesize * (pos11 >> 1) + (pos11 & 1)];
const int cond00 = (P(0xbf, 0x37) || P(0xdb, 0x13)) && WDIFF(w1, w5);
const int cond01 = (P(0xdb, 0x49) || P(0xef, 0x6d)) && WDIFF(w7, w3);
const int cond02 = (P(0x6f, 0x2a) || P(0x5b, 0x0a) || P(0xbf, 0x3a) ||
P(0xdf, 0x5a) || P(0x9f, 0x8a) || P(0xcf, 0x8a) ||
P(0xef, 0x4e) || P(0x3f, 0x0e) || P(0xfb, 0x5a) ||
P(0xbb, 0x8a) || P(0x7f, 0x5a) || P(0xaf, 0x8a) ||
P(0xeb, 0x8a)) &&
WDIFF(w3, w1);
const int cond03 = P(0xdb, 0x49) || P(0xef, 0x6d);
const int cond04 = P(0xbf, 0x37) || P(0xdb, 0x13);
const int cond05 = P(0x1b, 0x03) || P(0x4f, 0x43) || P(0x8b, 0x83) ||
P(0x6b, 0x43);
const int cond06 = P(0x4b, 0x09) || P(0x8b, 0x89) || P(0x1f, 0x19) ||
P(0x3b, 0x19);
const int cond07 = P(0x0b, 0x08) || P(0xf9, 0x68) || P(0xf3, 0x62) ||
P(0x6d, 0x6c) || P(0x67, 0x66) || P(0x3d, 0x3c) ||
P(0x37, 0x36) || P(0xf9, 0xf8) || P(0xdd, 0xdc) ||
P(0xf3, 0xf2) || P(0xd7, 0xd6) || P(0xdd, 0x1c) ||
P(0xd7, 0x16) || P(0x0b, 0x02);
const int cond08 = (P(0x0f, 0x0b) || P(0x2b, 0x0b) || P(0xfe, 0x4a) ||
P(0xfe, 0x1a)) &&
WDIFF(w3, w1);
const int cond09 = P(0x2f, 0x2f);
const int cond10 = P(0x0a, 0x00);
const int cond11 = P(0x0b, 0x09);
const int cond12 = P(0x7e, 0x2a) || P(0xef, 0xab);
const int cond13 = P(0xbf, 0x8f) || P(0x7e, 0x0e);
const int cond14 = P(0x4f, 0x4b) || P(0x9f, 0x1b) || P(0x2f, 0x0b) ||
P(0xbe, 0x0a) || P(0xee, 0x0a) || P(0x7e, 0x0a) ||
P(0xeb, 0x4b) || P(0x3b, 0x1b);
const int cond15 = P(0x0b, 0x03);
if (cond00)
*dst00 = interp_2px(w4, 5, w3, 3, 3);
else if (cond01)
*dst00 = interp_2px(w4, 5, w1, 3, 3);
else if ((P(0x0b, 0x0b) || P(0xfe, 0x4a) || P(0xfe, 0x1a)) && WDIFF(w3, w1))
*dst00 = w4;
else if (cond02)
*dst00 = interp_2px(w4, 5, w0, 3, 3);
else if (cond03)
*dst00 = interp_2px(w4, 3, w3, 1, 2);
else if (cond04)
*dst00 = interp_2px(w4, 3, w1, 1, 2);
else if (cond05)
*dst00 = interp_2px(w4, 5, w3, 3, 3);
else if (cond06)
*dst00 = interp_2px(w4, 5, w1, 3, 3);
else if (P(0x0f, 0x0b) || P(0x5e, 0x0a) || P(0x2b, 0x0b) || P(0xbe, 0x0a) ||
P(0x7a, 0x0a) || P(0xee, 0x0a))
*dst00 = interp_2px(w1, 1, w3, 1, 1);
else if (cond07)
*dst00 = interp_2px(w4, 5, w0, 3, 3);
else
*dst00 = interp_3px(w4, 2, w1, 1, w3, 1, 2);
if (cond00)
*dst01 = interp_2px(w4, 7, w3, 1, 3);
else if (cond08)
*dst01 = w4;
else if (cond02)
*dst01 = interp_2px(w4, 3, w0, 1, 2);
else if (cond09)
*dst01 = w4;
else if (cond10)
*dst01 = interp_3px(w4, 5, w1, 2, w3, 1, 3);
else if (P(0x0b, 0x08))
*dst01 = interp_3px(w4, 5, w1, 2, w0, 1, 3);
else if (cond11)
*dst01 = interp_2px(w4, 5, w1, 3, 3);
else if (cond04)
*dst01 = interp_2px(w1, 3, w4, 1, 2);
else if (cond12)
*dst01 = interp_3px(w1, 2, w4, 1, w3, 1, 2);
else if (cond13)
*dst01 = interp_2px(w1, 5, w3, 3, 3);
else if (cond05)
*dst01 = interp_2px(w4, 7, w3, 1, 3);
else if (P(0xf3, 0x62) || P(0x67, 0x66) || P(0x37, 0x36) || P(0xf3, 0xf2) ||
P(0xd7, 0xd6) || P(0xd7, 0x16) || P(0x0b, 0x02))
*dst01 = interp_2px(w4, 3, w0, 1, 2);
else if (cond14)
*dst01 = interp_2px(w1, 1, w4, 1, 1);
else
*dst01 = interp_2px(w4, 3, w1, 1, 2);
if (cond01)
*dst10 = interp_2px(w4, 7, w1, 1, 3);
else if (cond08)
*dst10 = w4;
else if (cond02)
*dst10 = interp_2px(w4, 3, w0, 1, 2);
else if (cond09)
*dst10 = w4;
else if (cond10)
*dst10 = interp_3px(w4, 5, w3, 2, w1, 1, 3);
else if (P(0x0b, 0x02))
*dst10 = interp_3px(w4, 5, w3, 2, w0, 1, 3);
else if (cond15)
*dst10 = interp_2px(w4, 5, w3, 3, 3);
else if (cond03)
*dst10 = interp_2px(w3, 3, w4, 1, 2);
else if (cond13)
*dst10 = interp_3px(w3, 2, w4, 1, w1, 1, 2);
else if (cond12)
*dst10 = interp_2px(w3, 5, w1, 3, 3);
else if (cond06)
*dst10 = interp_2px(w4, 7, w1, 1, 3);
else if (P(0x0b, 0x08) || P(0xf9, 0x68) || P(0x6d, 0x6c) || P(0x3d, 0x3c) ||
P(0xf9, 0xf8) || P(0xdd, 0xdc) || P(0xdd, 0x1c))
*dst10 = interp_2px(w4, 3, w0, 1, 2);
else if (cond14)
*dst10 = interp_2px(w3, 1, w4, 1, 1);
else
*dst10 = interp_2px(w4, 3, w3, 1, 2);
if ((P(0x7f, 0x2b) || P(0xef, 0xab) || P(0xbf, 0x8f) || P(0x7f, 0x0f)) &&
WDIFF(w3, w1))
*dst11 = w4;
else if (cond02)
*dst11 = interp_2px(w4, 7, w0, 1, 3);
else if (cond15)
*dst11 = interp_2px(w4, 7, w3, 1, 3);
else if (cond11)
*dst11 = interp_2px(w4, 7, w1, 1, 3);
else if (P(0x0a, 0x00) || P(0x7e, 0x2a) || P(0xef, 0xab) || P(0xbf, 0x8f) ||
P(0x7e, 0x0e))
*dst11 = interp_3px(w4, 6, w3, 1, w1, 1, 3);
else if (cond07)
*dst11 = interp_2px(w4, 7, w0, 1, 3);
else
*dst11 = w4;
}
static inline void hqx_filter(uint16_t *in, int in_pitch, uint16_t *out, int out_pitch, int width, int height, int n)
{
int x, y;
const uint32_t *r2y = yuvtable;
const int dst_linesize = out_pitch;
const int src_linesize = in_pitch;
uint8_t *dst = (uint8_t *)out;
const uint8_t *src = (uint8_t *)in;
const int dst16_linesize = dst_linesize >> 1;
const int src16_linesize = src_linesize >> 1;
init();
for (y = 0; y < height; y++)
{
const uint16_t *src16 = (const uint16_t *)src;
uint16_t *dst16 = (uint16_t *)dst;
const int prevline = y > 0 ? -src16_linesize : 0;
const int nextline = y < height - 1 ? src16_linesize : 0;
for (x = 0; x < width; x++)
{
const int prevcol = x > 0 ? -1 : 0;
const int nextcol = x < width - 1 ? 1 : 0;
const uint16_t w[3 * 3] = {
src16[prevcol + prevline], src16[prevline], src16[prevline + nextcol],
src16[prevcol], src16[0], src16[nextcol],
src16[prevcol + nextline], src16[nextline], src16[nextline + nextcol]
};
const uint32_t yuv1 = rgb2yuv(r2y, w[4]);
const int pattern = (w[4] != w[0] ? (yuv_diff(yuv1, rgb2yuv(r2y, w[0]))) : 0) | (w[4] != w[1] ? (yuv_diff(yuv1, rgb2yuv(r2y, w[1]))) : 0) << 1 | (w[4] != w[2] ? (yuv_diff(yuv1, rgb2yuv(r2y, w[2]))) : 0) << 2 | (w[4] != w[3] ? (yuv_diff(yuv1, rgb2yuv(r2y, w[3]))) : 0) << 3 | (w[4] != w[5] ? (yuv_diff(yuv1, rgb2yuv(r2y, w[5]))) : 0) << 4 | (w[4] != w[6] ? (yuv_diff(yuv1, rgb2yuv(r2y, w[6]))) : 0) << 5 | (w[4] != w[7] ? (yuv_diff(yuv1, rgb2yuv(r2y, w[7]))) : 0) << 6 | (w[4] != w[8] ? (yuv_diff(yuv1, rgb2yuv(r2y, w[8]))) : 0) << 7;
if (n == 2)
{
dst16[dst16_linesize * 0 + 0] = hq2x_interp_1x1(r2y, pattern, w, 0, 1, 2, 3, 4, 5, 6, 7, 8); // 00
dst16[dst16_linesize * 0 + 1] = hq2x_interp_1x1(r2y, pattern, w, 2, 1, 0, 5, 4, 3, 8, 7, 6); // 01 (vert mirrored)
dst16[dst16_linesize * 1 + 0] = hq2x_interp_1x1(r2y, pattern, w, 6, 7, 8, 3, 4, 5, 0, 1, 2); // 10 (horiz mirrored)
dst16[dst16_linesize * 1 + 1] = hq2x_interp_1x1(r2y, pattern, w, 8, 7, 6, 5, 4, 3, 2, 1, 0); // 11 (center mirrored)
}
else if (n == 3)
{
hq3x_interp_2x1(dst16, dst16_linesize, r2y, pattern, w, 0, 1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 0); // 00 01
hq3x_interp_2x1(dst16 + 1, dst16_linesize, r2y, pattern, w, 1, 3, 2, 5, 8, 1, 4, 7, 0, 3, 6, 1); // 02 12 (rotated to the right)
hq3x_interp_2x1(dst16 + 1 * dst16_linesize, dst16_linesize, r2y, pattern, w, 2, 0, 6, 3, 0, 7, 4, 1, 8, 5, 2, 1); // 20 10 (rotated to the left)
hq3x_interp_2x1(dst16 + 1 * dst16_linesize + 1, dst16_linesize, r2y, pattern, w, 3, 2, 8, 7, 6, 5, 4, 3, 2, 1, 0, 0); // 22 21 (center mirrored)
dst16[dst16_linesize + 1] = w[4]; // 11
}
else if (n == 4)
{
hq4x_interp_2x2(dst16, dst16_linesize, r2y, pattern, w, 0, 1, 2, 3, 0, 1, 2, 3, 4, 5, 6, 7, 8); // 00 01 10 11
hq4x_interp_2x2(dst16 + 2, dst16_linesize, r2y, pattern, w, 1, 0, 3, 2, 2, 1, 0, 5, 4, 3, 8, 7, 6); // 02 03 12 13 (vert mirrored)
hq4x_interp_2x2(dst16 + 2 * dst16_linesize, dst16_linesize, r2y, pattern, w, 2, 3, 0, 1, 6, 7, 8, 3, 4, 5, 0, 1, 2); // 20 21 30 31 (horiz mirrored)
hq4x_interp_2x2(dst16 + 2 * dst16_linesize + 2, dst16_linesize, r2y, pattern, w, 3, 2, 1, 0, 8, 7, 6, 5, 4, 3, 2, 1, 0); // 22 23 32 33 (center mirrored)
}
else
{
}
src16 += 1;
dst16 += n;
}
src += src_linesize;
dst += dst_linesize * n;
}
}
bool S9xBlitHQ2xFilterInit(void)
{
return true;
}
void S9xBlitHQ2xFilterDeinit(void)
{
}
void HQ2X_16(uint8_t *in, int in_pitch, uint8_t *out, int out_pitch, int width, int height)
{
hqx_filter((uint16_t *)in, in_pitch, (uint16_t *)out, out_pitch, width, height, 2);
}
void HQ3X_16(uint8_t *in, int in_pitch, uint8_t *out, int out_pitch, int width, int height)
{
hqx_filter((uint16_t *)in, in_pitch, (uint16_t *)out, out_pitch, width, height, 3);
}
void HQ4X_16(uint8_t *in, int in_pitch, uint8_t *out, int out_pitch, int width, int height)
{
hqx_filter((uint16_t *)in, in_pitch, (uint16_t *)out, out_pitch, width, height, 4);
}
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