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#include "cfg.h"
#ifdef G
#include "links.h"
#ifdef HAVE_WEBP
#include <webp/decode.h>
struct webp_decoder {
unsigned char *buffer;
int len;
};
static void webp_free(unsigned char *ptr)
{
#ifdef HAVE_WEBPFREE
WebPFree(ptr);
#else
free(ptr);
#endif
}
void webp_start(struct cached_image *cimg)
{
struct webp_decoder *deco;
deco = mem_alloc(sizeof(struct webp_decoder));
deco->buffer = init_str();
deco->len = 0;
cimg->decoder = deco;
}
void webp_restart(struct cached_image *cimg, unsigned char *data, int length)
{
struct webp_decoder *deco = (struct webp_decoder *)cimg->decoder;
add_bytes_to_str(&deco->buffer, &deco->len, data, length);
}
void webp_finish(struct cached_image *cimg)
{
int w, h;
struct webp_decoder *deco = (struct webp_decoder *)cimg->decoder;
unsigned char *pixels;
pixels = WebPDecodeRGBA(deco->buffer, deco->len, &w, &h);
if (!pixels)
goto end;
cimg->width = w;
cimg->height = h;
cimg->buffer_bytes_per_pixel = 4;
cimg->red_gamma = cimg->green_gamma = cimg->blue_gamma = (float)sRGB_gamma;
cimg->strip_optimized = 0;
if (header_dimensions_known(cimg))
goto end_free_pixels;
memcpy(cimg->buffer, pixels, w * h * 4);
end_free_pixels:
webp_free(pixels);
end:
img_end(cimg);
}
void webp_destroy_decoder(struct cached_image *cimg)
{
struct webp_decoder *deco = (struct webp_decoder *)cimg->decoder;
mem_free(deco->buffer);
}
void add_webp_version(unsigned char **s, int *l)
{
int v = WebPGetDecoderVersion();
add_to_str(s, l, cast_uchar "WEBP (");
add_num_to_str(s, l, (v >> 16));
add_chr_to_str(s, l, '.');
add_num_to_str(s, l, (v >> 8) & 0xff);
add_chr_to_str(s, l, '.');
add_num_to_str(s, l, v & 0xff);
add_chr_to_str(s, l, ')');
}
#endif
#endif
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