com.github.mathiewz.slick.opengl.renderer.Renderer Maven / Gradle / Ivy

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The main purpose of this libraryis to modernize and maintain the slick2D library.
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package com.github.mathiewz.slick.opengl.renderer;

import com.github.mathiewz.slick.SlickException;

/**
 * The static holder for the current GL implementation. Note that this
 * renderer can only be set before the game has been started.
 *
 * @author kevin
 */
public class Renderer {
    /** The indicator for immediate mode renderering (the default) */
    public static final int IMMEDIATE_RENDERER = 1;
    /** The indicator for vertex array based rendering */
    public static final int VERTEX_ARRAY_RENDERER = 2;
    
    /** The indicator for direct GL line renderer (the default) */
    public static final int DEFAULT_LINE_STRIP_RENDERER = 3;
    /** The indicator for consistant quad based lines */
    public static final int QUAD_BASED_LINE_STRIP_RENDERER = 4;
    
    /** The renderer in use */
    private static SGL renderer = new ImmediateModeOGLRenderer();
    /** The line strip renderer to use */
    private static LineStripRenderer lineStripRenderer = new DefaultLineStripRenderer();
    
    /**
     * Set the renderer to one of the known types
     *
     * @param type
     *            The type of renderer to use
     */
    public static void setRenderer(int type) {
        switch (type) {
            case IMMEDIATE_RENDERER:
                setRenderer(new ImmediateModeOGLRenderer());
                return;
            case VERTEX_ARRAY_RENDERER:
                setRenderer(new VAOGLRenderer());
                return;
        }
        
        throw new SlickException("Unknown renderer type: " + type);
    }
    
    /**
     * Set the line strip renderer to one of the known types
     *
     * @param type
     *            The type of renderer to use
     */
    public static void setLineStripRenderer(int type) {
        switch (type) {
            case DEFAULT_LINE_STRIP_RENDERER:
                setLineStripRenderer(new DefaultLineStripRenderer());
                return;
            case QUAD_BASED_LINE_STRIP_RENDERER:
                setLineStripRenderer(new QuadBasedLineStripRenderer());
                return;
            default:
                throw new SlickException("Unknown line strip renderer type: " + type);
                
        }
        
    }
    
    /**
     * Set the line strip renderer to be used globally
     *
     * @param renderer
     *            The line strip renderer to be used
     */
    public static void setLineStripRenderer(LineStripRenderer renderer) {
        lineStripRenderer = renderer;
    }
    
    /**
     * Set the renderer to be used
     *
     * @param r
     *            The renderer to be used
     */
    public static void setRenderer(SGL r) {
        renderer = r;
    }
    
    /**
     * Get the renderer to be used when accessing GL
     *
     * @return The renderer to be used when accessing GL
     */
    public static SGL get() {
        return renderer;
    }
    
    /**
     * Get the line strip renderer to use
     *
     * @return The line strip renderer to use
     */
    public static LineStripRenderer getLineStripRenderer() {
        return lineStripRenderer;
    }
    
}