Function Inflate

czxing/src/main/cpp/zxing/src/BitMatrix.cpp:132–158

}

BitMatrix Inflate(BitMatrix&& input, int width, int height, int quietZone)
{
	const int codeWidth = input.width();
	const int codeHeight = input.height();
	const int outputWidth = std::max(width, codeWidth + 2 * quietZone);
	const int outputHeight = std::max(height, codeHeight + 2 * quietZone);

	if (input.width() == outputWidth && input.height() == outputHeight)
		return std::move(input);

	const int scale = std::min((outputWidth - 2*quietZone) / codeWidth, (outputHeight - 2*quietZone) / codeHeight);
	// Padding includes both the quiet zone and the extra white pixels to
	// accommodate the requested dimensions.
	const int leftPadding = (outputWidth - (codeWidth * scale)) / 2;
	const int topPadding = (outputHeight - (codeHeight * scale)) / 2;

	BitMatrix result(outputWidth, outputHeight);

	for (int inputY = 0, outputY = topPadding; inputY < input.height(); ++inputY, outputY += scale) {
		for (int inputX = 0, outputX = leftPadding; inputX < input.width(); ++inputX, outputX += scale) {
			if (input.get(inputX, inputY))
				result.setRegion(outputX, outputY, scale, scale);
		}
	}

	return result;
}

BitMatrix Deflate(const BitMatrix& input, int width, int height, float top, float left, float subSampling)
{