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jdk/src/java.desktop/share/native/libmlib_image/mlib_ImageConv_32nw.c
Jayathirth D V 3b6ac2af9c 8362308: Enhance Bitmap operations 
Reviewed-by: mschoene, rhalade, psadhukhan, prr
2026-01-18 20:22:54 -08:00

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/*
* Copyright (c) 2000, 2025, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* FUNCTION
* Internal functions for mlib_ImageConv* on S32 type and
* MLIB_EDGE_DST_NO_WRITE mask
*
*/
#include "mlib_image.h"
#include "mlib_ImageConv.h"
#include "safe_math.h"
/***************************************************************/
#define CACHE_SIZE (64*1024)
/***************************************************************/
#define CONV_FUNC(KERN) mlib_conv##KERN##nw_s32
/***************************************************************/
#ifndef MLIB_USE_FTOI_CLAMPING
#define CLAMP_S32(dst, src) \
if (src > (mlib_d64)MLIB_S32_MAX) src = (mlib_d64)MLIB_S32_MAX; \
if (src < (mlib_d64)MLIB_S32_MIN) src = (mlib_d64)MLIB_S32_MIN; \
dst = (mlib_s32)src
#else
#define CLAMP_S32(dst, src) dst = (mlib_s32)(src)
#endif /* MLIB_USE_FTOI_CLAMPING */
/***************************************************************/
#define GET_SRC_DST_PARAMETERS(type) \
mlib_s32 hgt = mlib_ImageGetHeight(src); \
mlib_s32 wid = mlib_ImageGetWidth(src); \
mlib_s32 sll = mlib_ImageGetStride(src) / sizeof(type); \
mlib_s32 dll = mlib_ImageGetStride(dst) / sizeof(type); \
type* adr_src = mlib_ImageGetData(src); \
type* adr_dst = mlib_ImageGetData(dst); \
mlib_s32 chan1 = mlib_ImageGetChannels(src)
/* mlib_s32 chan2 = chan1 + chan1 */
/***************************************************************/
#define DEF_VARS(type) \
GET_SRC_DST_PARAMETERS(type); \
type *sl, *sp, *sl1, *dl, *dp; \
mlib_d64 *pbuff = buff, *buff0, *buff1, *buff2, *buffT; \
mlib_s32 i, j, c; \
mlib_d64 scalef, d0, d1
/***************************************************************/
#define DEF_VARS_MxN(type) \
GET_SRC_DST_PARAMETERS(type); \
type *sl, *sp = NULL, *dl, *dp = NULL; \
mlib_d64 *pbuff = buff; \
mlib_s32 i, j, c
/***************************************************************/
#define FTYPE mlib_d64
#define DTYPE mlib_s32
#define BUFF_SIZE 1600
static mlib_status mlib_ImageConv1xN(mlib_image *dst,
const mlib_image *src,
const mlib_d64 *k,
mlib_s32 n,
mlib_s32 dn,
mlib_s32 cmask)
{
FTYPE buff[BUFF_SIZE];
mlib_s32 off, kh;
const FTYPE *pk;
FTYPE k0, k1, k2, k3, d0, d1;
FTYPE p0, p1, p2, p3, p4;
DTYPE *sl_c, *dl_c, *sl0;
mlib_s32 l, hsize, max_hsize;
DEF_VARS_MxN(DTYPE);
hgt -= (n - 1);
adr_dst += dn*dll;
max_hsize = (CACHE_SIZE/sizeof(DTYPE))/sll;
if (!max_hsize) max_hsize = 1;
if (max_hsize > BUFF_SIZE) {
pbuff = mlib_malloc(sizeof(FTYPE)*max_hsize);
}
sl_c = adr_src;
dl_c = adr_dst;
for (l = 0; l < hgt; l += hsize) {
hsize = hgt - l;
if (hsize > max_hsize) hsize = max_hsize;
for (c = 0; c < chan1; c++) {
if (!(cmask & (1 << (chan1 - 1 - c)))) continue;
sl = sl_c + c;
dl = dl_c + c;
for (j = 0; j < hsize; j++) pbuff[j] = 0.0;
for (i = 0; i < wid; i++) {
sl0 = sl;
for (off = 0; off < (n - 4); off += 4) {
pk = k + off;
sp = sl0;
k0 = pk[0]; k1 = pk[1]; k2 = pk[2]; k3 = pk[3];
p2 = sp[0]; p3 = sp[sll]; p4 = sp[2*sll];
sp += 3*sll;
for (j = 0; j < hsize; j += 2) {
p0 = p2; p1 = p3; p2 = p4;
p3 = sp[0];
p4 = sp[sll];
pbuff[j ] += p0*k0 + p1*k1 + p2*k2 + p3*k3;
pbuff[j + 1] += p1*k0 + p2*k1 + p3*k2 + p4*k3;
sp += 2*sll;
}
sl0 += 4*sll;
}
pk = k + off;
sp = sl0;
k0 = pk[0]; k1 = pk[1]; k2 = pk[2]; k3 = pk[3];
p2 = sp[0]; p3 = sp[sll]; p4 = sp[2*sll];
dp = dl;
kh = n - off;
if (kh == 4) {
sp += 3*sll;
for (j = 0; j <= (hsize - 2); j += 2) {
p0 = p2; p1 = p3; p2 = p4;
p3 = sp[0];
p4 = sp[sll];
d0 = p0*k0 + p1*k1 + p2*k2 + p3*k3 + pbuff[j];
d1 = p1*k0 + p2*k1 + p3*k2 + p4*k3 + pbuff[j + 1];
CLAMP_S32(dp[0 ], d0);
CLAMP_S32(dp[dll], d1);
pbuff[j] = 0;
pbuff[j + 1] = 0;
sp += 2*sll;
dp += 2*dll;
}
if (j < hsize) {
p0 = p2; p1 = p3; p2 = p4;
p3 = sp[0];
d0 = p0*k0 + p1*k1 + p2*k2 + p3*k3 + pbuff[j];
CLAMP_S32(dp[0], d0);
pbuff[j] = 0;
}
} else if (kh == 3) {
sp += 2*sll;
for (j = 0; j <= (hsize - 2); j += 2) {
p0 = p2; p1 = p3;
p2 = sp[0];
p3 = sp[sll];
d0 = p0*k0 + p1*k1 + p2*k2 + pbuff[j];
d1 = p1*k0 + p2*k1 + p3*k2 + pbuff[j + 1];
CLAMP_S32(dp[0 ], d0);
CLAMP_S32(dp[dll], d1);
pbuff[j] = 0;
pbuff[j + 1] = 0;
sp += 2*sll;
dp += 2*dll;
}
if (j < hsize) {
p0 = p2; p1 = p3;
p2 = sp[0];
d0 = p0*k0 + p1*k1 + p2*k2 + pbuff[j];
CLAMP_S32(dp[0], d0);
pbuff[j] = 0;
}
} else if (kh == 2) {
sp += sll;
for (j = 0; j <= (hsize - 2); j += 2) {
p0 = p2;
p1 = sp[0];
p2 = sp[sll];
d0 = p0*k0 + p1*k1 + pbuff[j];
d1 = p1*k0 + p2*k1 + pbuff[j + 1];
CLAMP_S32(dp[0 ], d0);
CLAMP_S32(dp[dll], d1);
pbuff[j] = 0;
pbuff[j + 1] = 0;
sp += 2*sll;
dp += 2*dll;
}
if (j < hsize) {
p0 = p2;
p1 = sp[0];
d0 = p0*k0 + p1*k1 + pbuff[j];
CLAMP_S32(dp[0], d0);
pbuff[j] = 0;
}
} else /* if (kh == 1) */ {
for (j = 0; j < hsize; j++) {
p0 = sp[0];
d0 = p0*k0 + pbuff[j];
CLAMP_S32(dp[0], d0);
pbuff[j] = 0;
sp += sll;
dp += dll;
}
}
sl += chan1;
dl += chan1;
}
}
sl_c += max_hsize*sll;
dl_c += max_hsize*dll;
}
if (pbuff != buff) mlib_free(pbuff);
return MLIB_SUCCESS;
}
/***************************************************************/
#define MAX_KER 7
#define MAX_N 15
#undef BUFF_SIZE
#define BUFF_SIZE 1500
mlib_status CONV_FUNC(MxN)(mlib_image *dst,
const mlib_image *src,
const mlib_s32 *kernel,
mlib_s32 m,
mlib_s32 n,
mlib_s32 dm,
mlib_s32 dn,
mlib_s32 scale,
mlib_s32 cmask)
{
mlib_d64 buff[BUFF_SIZE], *buffs_arr[2*(MAX_N + 1)];
mlib_d64 **buffs = buffs_arr, *buffd;
mlib_d64 akernel[256], *k = akernel, fscale = 1.0;
mlib_s32 l, off, kw, bsize, buff_ind, mn;
mlib_d64 d0, d1;
mlib_d64 k0, k1, k2, k3, k4, k5, k6;
mlib_d64 p0, p1, p2, p3, p4, p5, p6, p7;
DEF_VARS_MxN(mlib_s32);
mlib_s32 chan2 = chan1 + chan1;
mlib_status status = MLIB_SUCCESS;
if (scale > 30) {
fscale *= 1.0/(1 << 30);
scale -= 30;
}
fscale /= (1 << scale);
mn = m*n;
if (mn > 256) {
k = mlib_malloc(mn*sizeof(mlib_d64));
if (k == NULL) return MLIB_FAILURE;
}
for (i = 0; i < mn; i++) {
k[i] = kernel[i]*fscale;
}
if (m == 1) {
status = mlib_ImageConv1xN(dst, src, k, n, dn, cmask);
FREE_AND_RETURN_STATUS;
}
if (!SAFE_TO_MULT((n + 2), wid)) {
status = MLIB_FAILURE;
FREE_AND_RETURN_STATUS;
}
bsize = (n + 2)*wid;
if ((bsize > BUFF_SIZE) || (n > MAX_N)) {
pbuff = mlib_malloc(sizeof(mlib_d64)*bsize + sizeof(mlib_d64*)*2*(n + 1));
if (pbuff == NULL) {
status = MLIB_FAILURE;
FREE_AND_RETURN_STATUS;
}
buffs = (mlib_d64**)(pbuff + bsize);
}
for (l = 0; l < (n + 1); l++) buffs[l] = pbuff + l*wid;
for (l = 0; l < (n + 1); l++) buffs[l + (n + 1)] = buffs[l];
buffd = buffs[n] + wid;
wid -= (m - 1);
hgt -= (n - 1);
adr_dst += dn*dll + dm*chan1;
for (c = 0; c < chan1; c++) {
if (!(cmask & (1 << (chan1 - 1 - c)))) continue;
sl = adr_src + c;
dl = adr_dst + c;
for (l = 0; l < n; l++) {
mlib_d64 *buff = buffs[l];
for (i = 0; i < wid + (m - 1); i++) {
buff[i] = (mlib_d64)sl[i*chan1];
}
sl += sll;
}
buff_ind = 0;
for (i = 0; i < wid; i++) buffd[i] = 0.0;
for (j = 0; j < hgt; j++) {
mlib_d64 **buffc = buffs + buff_ind;
mlib_d64 *buffn = buffc[n];
mlib_d64 *pk = k;
for (l = 0; l < n; l++) {
mlib_d64 *buff_l = buffc[l];
for (off = 0; off < m;) {
mlib_d64 *buff = buff_l + off;
kw = m - off;
if (kw > 2*MAX_KER) kw = MAX_KER; else
if (kw > MAX_KER) kw = kw/2;
off += kw;
sp = sl;
dp = dl;
p2 = buff[0]; p3 = buff[1]; p4 = buff[2];
p5 = buff[3]; p6 = buff[4]; p7 = buff[5];
k0 = pk[0]; k1 = pk[1]; k2 = pk[2]; k3 = pk[3];
k4 = pk[4]; k5 = pk[5]; k6 = pk[6];
pk += kw;
if (kw == 7) {
if (l < (n - 1) || off < m) {
for (i = 0; i <= (wid - 2); i += 2) {
p0 = p2; p1 = p3; p2 = p4; p3 = p5; p4 = p6; p5 = p7;
p6 = buff[i + 6]; p7 = buff[i + 7];
buffd[i ] += p0*k0 + p1*k1 + p2*k2 + p3*k3 + p4*k4 + p5*k5 + p6*k6;
buffd[i + 1] += p1*k0 + p2*k1 + p3*k2 + p4*k3 + p5*k4 + p6*k5 + p7*k6;
}
} else {
for (i = 0; i <= (wid - 2); i += 2) {
p0 = p2; p1 = p3; p2 = p4; p3 = p5; p4 = p6; p5 = p7;
p6 = buff[i + 6]; p7 = buff[i + 7];
buffn[i ] = (mlib_d64)sp[0];
buffn[i + 1] = (mlib_d64)sp[chan1];
d0 = p0*k0 + p1*k1 + p2*k2 + p3*k3 + p4*k4 + p5*k5 + p6*k6 + buffd[i ];
d1 = p1*k0 + p2*k1 + p3*k2 + p4*k3 + p5*k4 + p6*k5 + p7*k6 + buffd[i + 1];
CLAMP_S32(dp[0], d0);
CLAMP_S32(dp[chan1], d1);
buffd[i ] = 0.0;
buffd[i + 1] = 0.0;
sp += chan2;
dp += chan2;
}
}
} else if (kw == 6) {
if (l < (n - 1) || off < m) {
for (i = 0; i <= (wid - 2); i += 2) {
p0 = p2; p1 = p3; p2 = p4; p3 = p5; p4 = p6;
p5 = buff[i + 5]; p6 = buff[i + 6];
buffd[i ] += p0*k0 + p1*k1 + p2*k2 + p3*k3 + p4*k4 + p5*k5;
buffd[i + 1] += p1*k0 + p2*k1 + p3*k2 + p4*k3 + p5*k4 + p6*k5;
}
} else {
for (i = 0; i <= (wid - 2); i += 2) {
p0 = p2; p1 = p3; p2 = p4; p3 = p5; p4 = p6;
p5 = buff[i + 5]; p6 = buff[i + 6];
buffn[i ] = (mlib_d64)sp[0];
buffn[i + 1] = (mlib_d64)sp[chan1];
d0 = p0*k0 + p1*k1 + p2*k2 + p3*k3 + p4*k4 + p5*k5 + buffd[i ];
d1 = p1*k0 + p2*k1 + p3*k2 + p4*k3 + p5*k4 + p6*k5 + buffd[i + 1];
CLAMP_S32(dp[0], d0);
CLAMP_S32(dp[chan1], d1);
buffd[i ] = 0.0;
buffd[i + 1] = 0.0;
sp += chan2;
dp += chan2;
}
}
} else if (kw == 5) {
if (l < (n - 1) || off < m) {
for (i = 0; i <= (wid - 2); i += 2) {
p0 = p2; p1 = p3; p2 = p4; p3 = p5;
p4 = buff[i + 4]; p5 = buff[i + 5];
buffd[i ] += p0*k0 + p1*k1 + p2*k2 + p3*k3 + p4*k4;
buffd[i + 1] += p1*k0 + p2*k1 + p3*k2 + p4*k3 + p5*k4;
}
} else {
for (i = 0; i <= (wid - 2); i += 2) {
p0 = p2; p1 = p3; p2 = p4; p3 = p5;
p4 = buff[i + 4]; p5 = buff[i + 5];
buffn[i ] = (mlib_d64)sp[0];
buffn[i + 1] = (mlib_d64)sp[chan1];
d0 = p0*k0 + p1*k1 + p2*k2 + p3*k3 + p4*k4 + buffd[i ];
d1 = p1*k0 + p2*k1 + p3*k2 + p4*k3 + p5*k4 + buffd[i + 1];
CLAMP_S32(dp[0], d0);
CLAMP_S32(dp[chan1], d1);
buffd[i ] = 0.0;
buffd[i + 1] = 0.0;
sp += chan2;
dp += chan2;
}
}
} else if (kw == 4) {
if (l < (n - 1) || off < m) {
for (i = 0; i <= (wid - 2); i += 2) {
p0 = p2; p1 = p3; p2 = p4;
p3 = buff[i + 3]; p4 = buff[i + 4];
buffd[i ] += p0*k0 + p1*k1 + p2*k2 + p3*k3;
buffd[i + 1] += p1*k0 + p2*k1 + p3*k2 + p4*k3;
}
} else {
for (i = 0; i <= (wid - 2); i += 2) {
p0 = p2; p1 = p3; p2 = p4;
p3 = buff[i + 3]; p4 = buff[i + 4];
buffn[i ] = (mlib_d64)sp[0];
buffn[i + 1] = (mlib_d64)sp[chan1];
d0 = p0*k0 + p1*k1 + p2*k2 + p3*k3 + buffd[i ];
d1 = p1*k0 + p2*k1 + p3*k2 + p4*k3 + buffd[i + 1];
CLAMP_S32(dp[0], d0);
CLAMP_S32(dp[chan1], d1);
buffd[i ] = 0.0;
buffd[i + 1] = 0.0;
sp += chan2;
dp += chan2;
}
}
} else if (kw == 3) {
if (l < (n - 1) || off < m) {
for (i = 0; i <= (wid - 2); i += 2) {
p0 = p2; p1 = p3;
p2 = buff[i + 2]; p3 = buff[i + 3];
buffd[i ] += p0*k0 + p1*k1 + p2*k2;
buffd[i + 1] += p1*k0 + p2*k1 + p3*k2;
}
} else {
for (i = 0; i <= (wid - 2); i += 2) {
p0 = p2; p1 = p3;
p2 = buff[i + 2]; p3 = buff[i + 3];
buffn[i ] = (mlib_d64)sp[0];
buffn[i + 1] = (mlib_d64)sp[chan1];
d0 = p0*k0 + p1*k1 + p2*k2 + buffd[i ];
d1 = p1*k0 + p2*k1 + p3*k2 + buffd[i + 1];
CLAMP_S32(dp[0], d0);
CLAMP_S32(dp[chan1], d1);
buffd[i ] = 0.0;
buffd[i + 1] = 0.0;
sp += chan2;
dp += chan2;
}
}
} else { /* kw == 2 */
if (l < (n - 1) || off < m) {
for (i = 0; i <= (wid - 2); i += 2) {
p0 = p2;
p1 = buff[i + 1]; p2 = buff[i + 2];
buffd[i ] += p0*k0 + p1*k1;
buffd[i + 1] += p1*k0 + p2*k1;
}
} else {
for (i = 0; i <= (wid - 2); i += 2) {
p0 = p2;
p1 = buff[i + 1]; p2 = buff[i + 2];
buffn[i ] = (mlib_d64)sp[0];
buffn[i + 1] = (mlib_d64)sp[chan1];
d0 = p0*k0 + p1*k1 + buffd[i ];
d1 = p1*k0 + p2*k1 + buffd[i + 1];
CLAMP_S32(dp[0], d0);
CLAMP_S32(dp[chan1], d1);
buffd[i ] = 0.0;
buffd[i + 1] = 0.0;
sp += chan2;
dp += chan2;
}
}
}
}
}
/* last pixels */
for (; i < wid; i++) {
mlib_d64 *pk = k, s = 0;
mlib_s32 x;
for (l = 0; l < n; l++) {
mlib_d64 *buff = buffc[l] + i;
for (x = 0; x < m; x++) s += buff[x] * (*pk++);
}
CLAMP_S32(dp[0], s);
buffn[i] = (mlib_d64)sp[0];
sp += chan1;
dp += chan1;
}
for (l = 0; l < (m - 1); l++) buffn[wid + l] = sp[l*chan1];
/* next line */
sl += sll;
dl += dll;
buff_ind++;
if (buff_ind >= n + 1) buff_ind = 0;
}
}
FREE_AND_RETURN_STATUS;
}
/***************************************************************/
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