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

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Here is the source code for com.xrbpowered.gl.res.buffers.MultisampleBuffers.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 org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.GL30;
import org.lwjgl.opengl.GL32;

public class MultisampleBuffers extends OffscreenBuffers {

    private int colorMSTexId;
    private int depthMSTexId;
    private OffscreenBuffers resolve;

    public MultisampleBuffers(int w, int h, int samples, boolean hdr) {
        super(GL30.glGenFramebuffers(), w, h);
        GL30.glBindFramebuffer(GL30.GL_FRAMEBUFFER, fbo);
        create(w, h, samples, true, hdr);
        resolve = new OffscreenBuffers(w, h, false, hdr);
    }

    public MultisampleBuffers(int w, int h, int samples) {
        this(w, h, samples, false);
    }

    protected void create(int w, int h, int samples, boolean depthBuffer, boolean hdr) {
        colorMSTexId = GL11.glGenTextures();
        GL11.glBindTexture(GL32.GL_TEXTURE_2D_MULTISAMPLE, colorMSTexId);
        GL32.glTexImage2DMultisample(GL32.GL_TEXTURE_2D_MULTISAMPLE, samples, hdr ? GL30.GL_RGB16F : GL11.GL_RGB, w,
                h, false);
        GL11.glBindTexture(GL32.GL_TEXTURE_2D_MULTISAMPLE, 0);
        GL32.glFramebufferTexture(GL30.GL_FRAMEBUFFER, GL30.GL_COLOR_ATTACHMENT0, colorMSTexId, 0);

        depthMSTexId = 0;
        if (depthBuffer) {
            depthMSTexId = GL11.glGenTextures();
            GL11.glBindTexture(GL32.GL_TEXTURE_2D_MULTISAMPLE, depthMSTexId);
            GL32.glTexImage2DMultisample(GL32.GL_TEXTURE_2D_MULTISAMPLE, samples, GL30.GL_DEPTH24_STENCIL8, w, h,
                    false);
            GL11.glBindTexture(GL32.GL_TEXTURE_2D_MULTISAMPLE, 0);
            GL32.glFramebufferTexture(GL30.GL_FRAMEBUFFER, GL30.GL_DEPTH_ATTACHMENT, depthMSTexId, 0);
        }
        checkStatus();
        GL30.glBindFramebuffer(GL30.GL_FRAMEBUFFER, 0);
    }

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

    public void bindColorBuffer(int index) {
        resolve.bindColorBuffer(index);
    }

    public void bindDepthBuffer(int index) {
        if (depthMSTexId > 0)
            resolve.bindDepthBuffer(index);
    }

    @Override
    public boolean isMultisample() {
        return true;
    }

    @Override
    public void destroy() {
        resolve.destroy();
        super.destroy();
    }

}