Method run

tools/rle4encode.js:68–106

()

	}

	run() {
		let parts = this.splitPath(this.inputPath);
		parts.directory = this.outputPath;
		parts.extension = ".bm4";
		let output = new FILE(this.joinPath(parts), "wb");

		let uncompressed = parseBMP(this.readFileBuffer(this.inputPath));
		let convert = new Converter(uncompressed.pixelFormat, Bitmap.Gray16);

		let writer = new RLE4Out({width: uncompressed.width, height: uncompressed.height, pixelFormat: Bitmap.Gray16});
		writer.begin(0, 0, uncompressed.width, uncompressed.height);

		let sourceLineBytes = ((Bitmap.depth(uncompressed.pixelFormat) * uncompressed.width) + 7) >> 3;
		let destLineBytes = ((4 * uncompressed.width) + 7) >> 3;
		let destLine = (new Uint8Array(destLineBytes)).buffer;
		for (let i = 0, offset = uncompressed.offset; i < uncompressed.height; i++) {
			let sourceLine = uncompressed.buffer.slice(offset + (i * sourceLineBytes), offset + ((i + 1) * sourceLineBytes));
			convert.process(sourceLine, destLine);
			writer.send(destLine);
		}

		writer.end();

		let compressed = writer.bitmap;

		// header: 'md', version, Commodetto pixel format, width and height (big endian)
		output.writeByte('m'.charCodeAt(0));
		output.writeByte('d'.charCodeAt(0));
		output.writeByte(0);
		output.writeByte(compressed.pixelFormat);
		output.writeByte(compressed.width >> 8);
		output.writeByte(compressed.width & 0xFF);
		output.writeByte(compressed.height >> 8);
		output.writeByte(compressed.height & 0xFF);

		output.writeBuffer(compressed.buffer);

		output.close();
	}
}