squoosh/codecs/webp_enc/webp_enc.c

#include "emscripten.h"
#include "src/webp/encode.h"
#include <stdlib.h>

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int version() {
  return WebPGetEncoderVersion();
}

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uint8_t* create_buffer(int width, int height) {
  return malloc(width * height * 4 * sizeof(uint8_t));
}

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void destroy_buffer(uint8_t* p) {
  free(p);
}

int result[2];
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void encode(uint8_t* img_in, int width, int height, float quality) {
  uint8_t* img_out;
  size_t size;
  size = WebPEncodeRGBA(img_in, width, height, width * 4, quality, &img_out);
  result[0] = (int)img_out;
  result[1] = size;
}

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void free_result() {
  WebPFree(result[0]);
}

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int get_result_pointer() {
  return result[0];
}

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int get_result_size() {
  return result[1];
}