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#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <errno.h>
#include <webp/decode.h>
#include "readers.h"
struct webp_state {
FILE *f;
int width, height;
uint8_t *data;
};
static void *
webp_init(FILE *fp, char *filename, unsigned int page,
struct ida_image_info *i, int thumbnail)
{
uint32_t img_size;
void *img;
struct webp_state *h;
h = malloc(sizeof(*h));
h->f = fp;
if(fseek(fp, 0, SEEK_END) != 0)
{
free(h);
return NULL;
}
img_size = ftell(fp);
img = malloc(img_size);
if(fseek(fp, 0, SEEK_SET) != 0)
{
free(img);
free(h);
return NULL;
}
if(fread(img, img_size, 1, fp) != 1)
{
free(img);
free(h);
return NULL;
}
h->data = WebPDecodeRGBA(img, img_size, &h->width, &h->height);
i->width = h->width;
i->height = h->height;
i->dpi = 100;
i->npages = 1;
free(img);
return h;
}
static void
webp_read(unsigned char *dst, unsigned int line, void *data)
{
struct webp_state *h = data;
load_rgba(dst, h->data + line * 4 * h->width, h->width);
}
static void
webp_done(void *data)
{
struct webp_state *h = data;
free(h->data);
fclose(h->f);
free(h);
}
static struct ida_loader webp_loader = {
magic: "WEBPVP8",
moff: 8,
mlen: 7,
name: "libwebp",
init: webp_init,
read: webp_read,
done: webp_done,
};
static void __init init_rd(void)
{
load_register(&webp_loader);
}
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