#include <config.h>
#ifndef _plan9_
#ifndef NO_MALLOC_H
#include <malloc.h>
#endif
#include <config.h>
#include <stdlib.h>
#else
#include <u.h>
#include <libc.h>
#include <stdio.h>
#endif
#define SLARGEITER
#include <filter.h>
#include <xthread.h>
#define NCOLORS 256
#define IMAGETYPE SMALLITER
#define spixel_t pixel8_t
struct siterdata
{
    struct palette *palette;
};
static int
requirement (struct filter *f, struct requirements *r)
{
    f->req = *r;
    r->nimages = 1;
    r->flags &= ~IMAGEDATA;
    r->supportedmask = MASK1BPP | MASK2BPP | MASK3BPP | MASK4BPP;
    return (f->next->action->requirement (f->next, r));
}

static int
initialize (struct filter *f, struct initdata *i)
{
    struct siterdata *s = (struct siterdata *) f->data;
    inhermisc (f, i);
    if (!inherimage (f, i, TOUCHIMAGE, 0, 0, s->palette, 0, 0))
        return 0;
    return (f->previous->action->initialize (f->previous, i));
}

static struct filter *
getinstance (const struct filteraction *a)
{
    struct filter *f = createfilter (a);
    struct siterdata *i = (struct siterdata *) calloc (1, sizeof (*i));
    i->palette = createpalette (0, 65536, IMAGETYPE, 0, 65536, NULL, NULL, NULL, NULL, NULL);
    f->data = i;
    f->name = "Smalliter image converter";
    return (f);
}

static void
convert8 (void *data, struct taskinfo *task, int r1, int r2)
{
    struct filter *f = (struct filter *) data;
    struct image *img1 = f->childimage, *img2 = f->image;
    unsigned char *src, *srcend;
    unsigned int *pixels = img2->palette->pixels;
    pixel8_t *dest;
    int i;
    for (i = r1; i < r2; i++) {
        src = img1->currlines[i];
        dest = img2->currlines[i];
        srcend = src + img1->width;
        for (; src < srcend; src++, dest++)
            *dest = pixels[*src];
    }
}

static void
convert16 (void *data, struct taskinfo *task, int r1, int r2)
{
    struct filter *f = (struct filter *) data;
    struct image *img1 = f->childimage, *img2 = f->image;
    unsigned char *src, *srcend;
    unsigned int *pixels = img2->palette->pixels;
    pixel16_t *dest;
    int i;
    for (i = r1; i < r2; i++) {
        src = img1->currlines[i];
        dest = (pixel16_t *) img2->currlines[i];
        srcend = src + img1->width;
        for (; src < srcend; src++, dest++) {
            *dest = pixels[*src];
        }
    }
}

#ifdef STRUECOLOR24
#include <true24.h>
static void
convert24 (void *data, struct taskinfo *task, int r1, int r2)
{
    struct filter *f = (struct filter *) data;
    struct image *img1 = f->childimage, *img2 = f->image;
    unsigned char *src, *srcend;
    unsigned int *pixels = img2->palette->pixels;
    cpixel_t *dest;
    int i;
    for (i = r1; i < r2; i++) {
        src = img1->currlines[i];
        dest = (cpixel_t *) img2->currlines[i];
        srcend = src + img1->width;
        for (; src < srcend; src++, dest += 3)
            p_set (dest, pixels[*src]);
    }
}
#endif
static void
convert32 (void *data, struct taskinfo *task, int r1, int r2)
{
    struct filter *f = (struct filter *) data;
    struct image *img1 = f->childimage, *img2 = f->image;
    unsigned char *src, *srcend;
    unsigned int *pixels = img2->palette->pixels;
    pixel32_t *dest;
    int i;
    for (i = r1; i < r2; i++) {
        src = img1->currlines[i];
        dest = (pixel32_t *) img2->currlines[i];
        srcend = src + img1->width;
        for (; src < srcend; src++, dest++)
            *dest = pixels[*src];
    }
}

static void
destroyinstance (struct filter *f)
{
    struct siterdata *i = (struct siterdata *) f->data;
    destroypalette (i->palette);
    free (f->data);
    destroyinheredimage (f);
    free (f);
}

static int
doit (struct filter *f, int flags, int time)
{
    int val;
    int size;
    updateinheredimage (f);
    if (f->image->palette->size < 256)
        size = f->image->palette->size;
    else
        size = 256;
    if (size != f->childimage->palette->size)
        f->childimage->palette->size = size, f->childimage->palette->version++;
    val = f->previous->action->doit (f->previous, flags, time);
    if (f->image->palette->type != SMALLITER || f->image->currlines[0] != f->childimage->currlines[0]) {
    drivercall (*f->image, xth_function (convert8, f, f->image->height), xth_function (convert16, f, f->image->height), xth_function (convert24, f, f->image->height), xth_function (convert32, f, f->image->height))}
    xth_sync ();
    return val;
}

const struct filteraction smalliter_filter = {
    "Smalliter image converter",
    "smalliter",
    0,
    getinstance,
    destroyinstance,
    doit,
    requirement,
    initialize,
    convertupgeneric,
    convertdowngeneric,
    NULL
};
