com.xrbpowered.gl.res.buffers.OffscreenBuffers.java Source code

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Here is the source code for com.xrbpowered.gl.res.buffers.OffscreenBuffers.java

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/*******************************************************************************
 * MIT License
 *
 * Copyright (c) 2016 Ashur Rafiev
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 *******************************************************************************/
package com.xrbpowered.gl.res.buffers;

import java.nio.ByteBuffer;

import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.GL12;
import org.lwjgl.opengl.GL13;
import org.lwjgl.opengl.GL14;
import org.lwjgl.opengl.GL30;

public class OffscreenBuffers extends RenderTarget {

    protected int colorTexId;
    protected int depthTexId;

    protected OffscreenBuffers(int fbo, int w, int h) {
        super(fbo, w, h);
    }

    public OffscreenBuffers(int w, int h, boolean depthBuffer, boolean depthTexture) {
        super(GL30.glGenFramebuffers(), w, h);
        GL30.glBindFramebuffer(GL30.GL_FRAMEBUFFER, fbo);
        create(w, h, depthBuffer, depthTexture);
    }

    public OffscreenBuffers(int w, int h, boolean depthBuffer) {
        this(w, h, depthBuffer, false);
    }

    protected void create(int w, int h, boolean depthBuffer, boolean hdr) {
        colorTexId = GL11.glGenTextures();
        GL11.glBindTexture(GL11.GL_TEXTURE_2D, colorTexId);
        GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, hdr ? GL30.GL_RGB16F : GL11.GL_RGB, w, h, 0, GL11.GL_RGB,
                GL11.GL_UNSIGNED_BYTE, (ByteBuffer) null);
        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL12.GL_CLAMP_TO_EDGE);
        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, GL12.GL_CLAMP_TO_EDGE);
        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_LINEAR);
        GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_LINEAR);
        GL11.glBindTexture(GL11.GL_TEXTURE_2D, 0);
        GL30.glFramebufferTexture2D(GL30.GL_FRAMEBUFFER, GL30.GL_COLOR_ATTACHMENT0, GL11.GL_TEXTURE_2D, colorTexId,
                0);

        depthTexId = 0;
        if (depthBuffer) {
            depthTexId = GL11.glGenTextures();
            GL11.glBindTexture(GL11.GL_TEXTURE_2D, depthTexId);
            GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, GL14.GL_DEPTH_COMPONENT16, w, h, 0, GL11.GL_DEPTH_COMPONENT,
                    GL11.GL_FLOAT, (ByteBuffer) null);
            GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_S, GL12.GL_CLAMP_TO_EDGE);
            GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_WRAP_T, GL12.GL_CLAMP_TO_EDGE);
            GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MIN_FILTER, GL11.GL_NEAREST);
            GL11.glTexParameteri(GL11.GL_TEXTURE_2D, GL11.GL_TEXTURE_MAG_FILTER, GL11.GL_NEAREST);
            GL11.glBindTexture(GL11.GL_TEXTURE_2D, 0);
            GL30.glFramebufferTexture2D(GL30.GL_FRAMEBUFFER, GL30.GL_DEPTH_ATTACHMENT, GL11.GL_TEXTURE_2D,
                    depthTexId, 0);
        }
        checkStatus();
        GL30.glBindFramebuffer(GL30.GL_FRAMEBUFFER, 0);
    }

    public int getColorTexId() {
        return colorTexId;
    }

    public int getDepthTexId() {
        return depthTexId;
    }

    @Override
    public OffscreenBuffers resolve() {
        return this;
    }

    public void bindColorBuffer(int index) {
        GL13.glActiveTexture(GL13.GL_TEXTURE0 + index);
        GL11.glBindTexture(GL11.GL_TEXTURE_2D, colorTexId);
    }

    public void bindDepthBuffer(int index) {
        if (depthTexId > 0) {
            GL13.glActiveTexture(GL13.GL_TEXTURE0 + index);
            GL11.glBindTexture(GL11.GL_TEXTURE_2D, depthTexId);
        }
    }

    @Override
    public void destroy() {
        GL30.glDeleteFramebuffers(fbo);
        GL11.glDeleteTextures(colorTexId);
        if (depthTexId > 0)
            GL11.glDeleteTextures(depthTexId);
    }

}