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