com.github.mathiewz.slick.svg.SimpleDiagramRenderer 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.svg;

import org.lwjgl.opengl.GL11;

import com.github.mathiewz.slick.Color;
import com.github.mathiewz.slick.Graphics;
import com.github.mathiewz.slick.geom.Shape;
import com.github.mathiewz.slick.geom.ShapeRenderer;
import com.github.mathiewz.slick.geom.TexCoordGenerator;
import com.github.mathiewz.slick.opengl.TextureImpl;
import com.github.mathiewz.slick.opengl.renderer.Renderer;
import com.github.mathiewz.slick.opengl.renderer.SGL;

/**
 * A very primtive implementation for rendering a diagram. This simply
 * sticks the shapes on the screen in the right fill and stroke colours
 *
 * @author kevin
 */
public class SimpleDiagramRenderer {
    /** The renderer to use for all GL operations */
    protected static SGL GL = Renderer.get();
    
    /** The diagram to be rendered */
    public Diagram diagram;
    /** The display list representing the diagram */
    public int list = -1;
    
    /**
     * Create a new simple renderer
     *
     * @param diagram
     *            The diagram to be rendered
     */
    public SimpleDiagramRenderer(Diagram diagram) {
        this.diagram = diagram;
    }
    
    /**
     * Render the diagram to the given graphics context
     *
     * @param g
     *            The graphics context to which we should render the diagram
     */
    public void render(Graphics g) {
        // last list generation
        if (list == -1) {
            list = GL.glGenLists(1);
            GL.glNewList(list, GL11.GL_COMPILE);
            render(g, diagram);
            GL.glEndList();
        }
        
        GL.glCallList(list);
        
        TextureImpl.bindNone();
    }
    
    /**
     * Utility method to render a diagram in immediate mode
     *
     * @param g
     *            The graphics context to render to
     * @param diagram
     *            The diagram to render
     */
    public static void render(Graphics g, Diagram diagram) {
        for (int i = 0; i < diagram.getFigureCount(); i++) {
            Figure figure = diagram.getFigure(i);
            
            if (figure.getData().isFilled()) {
                if (figure.getData().isColor(NonGeometricData.FILL)) {
                    g.setColor(figure.getData().getAsColor(NonGeometricData.FILL));
                    g.fill(diagram.getFigure(i).getShape());
                    g.setAntiAlias(true);
                    g.draw(diagram.getFigure(i).getShape());
                    g.setAntiAlias(false);
                }
                
                String fill = figure.getData().getAsReference(NonGeometricData.FILL);
                if (diagram.getPatternDef(fill) != null) {
                    System.out.println("PATTERN");
                }
                if (diagram.getGradient(fill) != null) {
                    Gradient gradient = diagram.getGradient(fill);
                    Shape shape = diagram.getFigure(i).getShape();
                    TexCoordGenerator fg = null;
                    if (gradient.isRadial()) {
                        fg = new RadialGradientFill(shape, diagram.getFigure(i).getTransform(), gradient);
                    } else {
                        fg = new LinearGradientFill(shape, diagram.getFigure(i).getTransform(), gradient);
                    }
                    
                    Color.white.bind();
                    ShapeRenderer.texture(shape, gradient.getImage(), fg);
                }
            }
            
            if (figure.getData().isStroked()) {
                if (figure.getData().isColor(NonGeometricData.STROKE)) {
                    g.setColor(figure.getData().getAsColor(NonGeometricData.STROKE));
                    g.setLineWidth(figure.getData().getAsFloat(NonGeometricData.STROKE_WIDTH));
                    g.setAntiAlias(true);
                    g.draw(diagram.getFigure(i).getShape());
                    g.setAntiAlias(false);
                    g.resetLineWidth();
                }
            }
            
            // DEBUG VERSION
// g.setColor(Color.black);
// g.draw(diagram.getFigure(i).getShape());
// g.setColor(Color.red);
// g.fill(diagram.getFigure(i).getShape());
        }
    }
}