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#include <config.h>
#ifndef _plan9_
#ifdef NO_MALLOC_H
#include <stdlib.h>
#else
#include <malloc.h>
#endif
#include <stdio.h>
#else
#include <u.h>
#include <libc.h>
#include <stdio.h>
#endif
#include <filter.h>
#include <fractal.h>
#include <xthread.h>
struct embossdata {
struct palette *savedpalette, *palette;
int xdist, ydist;
unsigned int table[512];
};
static int requirement(struct filter *f, struct requirements *r)
{
f->req = *r;
r->nimages = 1;
r->flags &= ~(IMAGEDATA);
r->supportedmask =
GRAYSCALE | C256 | TRUECOLOR24 | TRUECOLOR | TRUECOLOR16;
return (f->next->action->requirement(f->next, r));
}
static int initialize(struct filter *f, struct initdata *i)
{
int x;
struct embossdata *s = (struct embossdata *) f->data;
inhermisc(f, i);
s->palette->size = 256 / 32;
for (x = 0; x < 256 / 32; x++)
s->palette->pixels[x] = x * 32;
#define SSTEP (32*8/64)
#define SSTEP2 (32*8/256)
if (datalost(f, i) || i->image->version != f->imageversion) {
if (s->savedpalette == NULL)
s->savedpalette = clonepalette(i->image->palette);
mkgraypalette(i->image->palette);
if (i->image->palette->type & (C256 | GRAYSCALE)) {
for (x = 0; x < 256; x++) {
int dist = (x + SSTEP - 1) / SSTEP;
dist += 32;
if (dist > 63)
dist = 63;
s->table[x] = i->image->palette->pixels[dist];
}
for (x = 256; x < 512; x++) {
int dist = -(512 - x + SSTEP - 1) / SSTEP;
dist += 32;
if (dist < 0)
dist = 0;
s->table[x] = i->image->palette->pixels[dist];
}
} else {
for (x = 0; x < 256; x++) {
int dist = (x + SSTEP2 - 1) / SSTEP2;
dist += 128;
if (dist > 255)
dist = 255;
s->table[x] =
((dist >> i->image->palette->info.truec.
rprec) << i->image->palette->info.truec.
rshift) | ((dist >> i->image->palette->info.
truec.gprec) << i->image->palette->
info.truec.
gshift) | ((dist >>
i->image->palette->info.truec.bprec)
<<
i->image->palette->info.truec.bshift);
}
for (x = 256; x < 512; x++) {
int dist = -(512 - x + SSTEP2 - 1) / SSTEP2;
dist += 128;
if (dist < 0)
dist = 0;
s->table[x] =
((dist >> i->image->palette->info.truec.
rprec) << i->image->palette->info.truec.
rshift) | ((dist >> i->image->palette->info.
truec.gprec) << i->image->palette->
info.truec.
gshift) | ((dist >>
i->image->palette->info.truec.bprec)
<<
i->image->palette->info.truec.bshift);
}
}
}
s->xdist = (int) (0.1 / i->image->pixelwidth);
s->ydist = (int) (0.1 / i->image->pixelwidth);
if (s->xdist < 1)
s->xdist = 1;
if (s->ydist < 1)
s->ydist = 1;
if (!inherimage
(f, i, TOUCHIMAGE, i->image->width + s->xdist,
i->image->height + s->ydist, s->palette, 0, 0))
return 0;
clear_image(f->image);
setfractalpalette(f, s->savedpalette);
return (f->previous->action->initialize(f->previous, i));
}
static struct filter *getinstance(CONST struct filteraction *a)
{
struct filter *f = createfilter(a);
struct embossdata *i = (struct embossdata *) calloc(1, sizeof(*i));
i->savedpalette = NULL;
i->palette =
createpalette(0, 256, GRAYSCALE, 0, 256, NULL, NULL, NULL, NULL,
NULL);
f->childimage = NULL;
f->data = i;
f->name = "Emboss";
return (f);
}
static void emboss8(void *data, struct taskinfo *task, int r1, int r2)
{
pixel8_t *src, *srcend, *src2;
pixel8_t *dest;
struct filter *f = (struct filter *) data;
struct embossdata *s = (struct embossdata *) f->data;
int i;
unsigned int *table = s->table;
for (i = r1; i < r2; i++) {
src = f->childimage->currlines[i];
src2 = f->childimage->currlines[i + s->ydist] + s->xdist;
srcend = src + f->image->width;
dest = f->image->currlines[i];
while (src < srcend) {
*dest = table[((int) *src2 - (int) *src) & 511];
src++;
src2++;
dest++;
}
}
}
#ifdef SUPPORT16
static void emboss16(void *data, struct taskinfo *task, int r1, int r2)
{
pixel8_t *src, *srcend, *src2;
pixel16_t *dest;
struct filter *f = (struct filter *) data;
struct embossdata *s = (struct embossdata *) f->data;
int i;
unsigned int *table = s->table;
for (i = r1; i < r2; i++) {
src = f->childimage->currlines[i];
src2 = f->childimage->currlines[i + s->ydist] + s->xdist;
srcend = src + f->image->width;
dest = (pixel16_t *) f->image->currlines[i];
while (src < srcend) {
*dest = table[((int) *src2 - (int) *src) & 511];
src++;
src2++;
dest++;
}
}
}
#endif
#ifdef STRUECOLOR24
static void emboss24(void *data, struct taskinfo *task, int r1, int r2)
{
pixel8_t *src, *srcend, *src2;
pixel8_t *dest;
struct filter *f = (struct filter *) data;
struct embossdata *s = (struct embossdata *) f->data;
int i;
unsigned int *table = s->table;
for (i = r1; i < r2; i++) {
src = f->childimage->currlines[i];
src2 = f->childimage->currlines[i + s->ydist] + s->xdist;
srcend = src + f->image->width;
dest = (pixel8_t *) f->image->currlines[i];
while (src < srcend) {
*dest = *(dest + 1) = *(dest + 2) =
table[((int) *src2 - (int) *src) & 511];
src++;
src2++;
dest += 3;
}
}
}
#endif
static void emboss32(void *data, struct taskinfo *task, int r1, int r2)
{
pixel8_t *src, *srcend, *src2;
pixel32_t *dest;
struct filter *f = (struct filter *) data;
struct embossdata *s = (struct embossdata *) f->data;
int i;
unsigned int *table = s->table;
for (i = r1; i < r2; i++) {
src = f->childimage->currlines[i];
src2 = f->childimage->currlines[i + s->ydist] + s->xdist;
srcend = src + f->image->width;
dest = (pixel32_t *) f->image->currlines[i];
while (src < srcend) {
*dest = table[((int) *src2 - (int) *src) & 511];
src++;
src2++;
dest++;
}
}
}
static void destroyinstance(struct filter *f)
{
struct embossdata *i = (struct embossdata *) f->data;
if (i->savedpalette != NULL)
destroypalette(i->savedpalette);
destroypalette(i->palette);
destroyinheredimage(f);
free(f->data);
free(f);
}
static int doit(struct filter *f, int flags, int time1)
{
int val;
int time = time1;
updateinheredimage(f);
val = f->previous->action->doit(f->previous, flags, time);
drivercall(*f->image,
xth_function(emboss8, f, f->image->height),
xth_function(emboss16, f, f->image->height),
xth_function(emboss24, f, f->image->height),
xth_function(emboss32, f, f->image->height));
xth_sync();
return val;
}
static void myremovefilter(struct filter *f)
{
struct embossdata *s = (struct embossdata *) f->data;
if (s->savedpalette != NULL) {
restorepalette(f->image->palette, s->savedpalette);
destroypalette(s->savedpalette);
s->savedpalette = NULL;
}
}
CONST struct filteraction emboss_filter = {
"Emboss",
"emboss",
0,
getinstance,
destroyinstance,
doit,
requirement,
initialize,
convertupgeneric,
convertdowngeneric,
myremovefilter
};
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