org.openpdf.renderer.function.postscript.operation.If Maven / Gradle / Ivy

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PDF renderer implementation supporting the subset of PDF 1.4 specification.

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package org.openpdf.renderer.function.postscript.operation;

import java.util.Stack;


final class If implements PostScriptOperation {
	@Override
	/**
	 * bool {proc} if - 
	 *
	 * removes both operands from the stack, then executes proc
	 * if bool is true. The if operator pushes no results of
	 * its own on the operand stack, but proc may do so (see
	 * Section 3.5, "Execution"). 

	 *
	 * Examples 

	 * 3 4 lt {(3 is less than 4)} if 

	 *
	 * errors: stackunderflow, typecheck
	 */
	public void eval(Stack