decode_stb.c

#include "decode.h"

#define STB_IMAGE_WRITE_IMPLEMENTATION
#include "stb_writer.h"

int main(int argc, char **argv) {
	if(argc < 5) {
		fprintf(stderr, "Usage: %s hash width height output_file [punch]\n", argv[0]);
		return 1;
	}

	int width, height, punch = 1;
	char * hash = argv[1];
	width = atoi(argv[2]);
	height = atoi(argv[3]);
	char * output_file = argv[4];

	const int nChannels = 4;

	if(argc == 6)
		punch = atoi(argv[5]);

	uint8_t * bytes = decode(hash, width, height, punch, nChannels);

	if (!bytes) {
		fprintf(stderr, "%s is not a valid blurhash, decoding failed.\n", hash);
		return 1;
	}

	if (stbi_write_png(output_file, width, height, nChannels, bytes, nChannels * width) == 0) {
		fprintf(stderr, "Failed to write PNG file %s\n", output_file);
		return 1;
	}

	freePixelArray(bytes);

	fprintf(stdout, "Decoded blurhash successfully, wrote PNG file %s\n", output_file);
	return 0;
}