DrawTexture.java

/**
 * Copyright (c) Lambda Innovation, 2013-2015
 * 本作品版权由Lambda Innovation所有。
 * http://www.li-dev.cn/
 *
 * This project is open-source, and it is distributed under  
 * the terms of GNU General Public License. You can modify
 * and distribute freely as long as you follow the license.
 * 本项目是一个开源项目，且遵循GNU通用公共授权协议。
 * 在遵照该协议的情况下，您可以自由传播和修改。
 * http://www.gnu.org/licenses/gpl.html
 */
package cn.liutils.cgui.gui.component;

import net.minecraft.util.ResourceLocation;

import static org.lwjgl.opengl.GL11.*;
import static org.lwjgl.opengl.GL20.*;

import cn.liutils.cgui.gui.Widget;
import cn.liutils.cgui.gui.event.FrameEvent;
import cn.liutils.cgui.gui.event.FrameEvent.FrameEventHandler;
import cn.liutils.util.client.HudUtils;
import cn.liutils.util.client.RenderUtils;
import cn.liutils.util.helper.Color;

/**
 * @author WeAthFolD
 */
public class DrawTexture extends Component {
    
    static final ResourceLocation MISSING = new ResourceLocation("liutils:textures/cgui/missing.png");
    
    public ResourceLocation texture = MISSING;
    
    public Color color = new Color(1, 1, 1, 1);
    
    public double zLevel = 0;
    
    public boolean writeDepth = true;
    
    private int shaderId = 0;

    public DrawTexture() {
        super("DrawTexture");
        this.addEventHandler(new FrameEventHandler() {
            @Override
            public void handleEvent(Widget w, FrameEvent event) {
                glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
                glDisable(GL_ALPHA_TEST);
                glDepthMask(writeDepth);
                glUseProgram(shaderId);
                color.bind();
                double preLevel = HudUtils.zLevel;
                HudUtils.zLevel = zLevel;
                if(texture != null && !texture.getResourcePath().equals("<null>")) {
                    RenderUtils.loadTexture(texture);
                    HudUtils.rect(0, 0, w.transform.width, w.transform.height);
                } else {
                    HudUtils.colorRect(0, 0, w.transform.width, w.transform.height);
                }
                HudUtils.zLevel = preLevel;
                glUseProgram(0);
                glDepthMask(true);
            }
        });
    }
    
    public void setShaderId(int id) {
        shaderId = id;
    }
    
    public DrawTexture setTex(ResourceLocation t) {
        texture = t;
        return this;
    }
    
    public DrawTexture setColor4i(int r, int g, int b, int a) {
        color.setColor4d(r / 255.0, g / 255.0, b / 255.0, a / 255.0);
        return this;
    }
    
    public DrawTexture setColor4d(double _r, double _g, double _b, double _a) {
        color.setColor4d(_r, _g, _b, _a);
        return this;
    }
    
    public static DrawTexture get(Widget w) {
        return w.getComponent("DrawTexture");
    }

}