me.thehutch.fusion.engine.render.opengl.gl30.OpenGL30FrameBuffer.java Source code

Introduction

Here is the source code for me.thehutch.fusion.engine.render.opengl.gl30.OpenGL30FrameBuffer.java

Source

/*
 * This file is part of Engine, licensed under the Apache 2.0 License.
 *
 * Copyright (c) 2014 thehutch.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package me.thehutch.fusion.engine.render.opengl.gl30;

import static org.lwjgl.opengl.GL11.GL_TEXTURE_2D;
import static org.lwjgl.opengl.GL30.GL_FRAMEBUFFER;
import static org.lwjgl.opengl.GL30.GL_FRAMEBUFFER_COMPLETE;
import static org.lwjgl.opengl.GL30.GL_RENDERBUFFER;

import me.thehutch.fusion.api.util.GLVersion;
import me.thehutch.fusion.engine.render.opengl.FrameBuffer;
import me.thehutch.fusion.engine.render.opengl.RenderBuffer;
import me.thehutch.fusion.engine.render.opengl.Texture;
import me.thehutch.fusion.engine.util.RenderUtil;
import org.lwjgl.opengl.GL30;

/**
 * @author thehutch
 */
public class OpenGL30FrameBuffer extends FrameBuffer {

    @Override
    public void create() {
        // Generate and bind the frame buffer
        this.fbo = GL30.glGenFramebuffers();
        // Check for errors
        RenderUtil.checkGLError();
        super.create();
    }

    @Override
    public void dispose() {
        // Delete the frame buffer
        GL30.glDeleteFramebuffers(fbo);
        // Clear the output buffers
        this.outputBuffers.clear();
        super.dispose();
    }

    @Override
    public void bind() {
        GL30.glBindFramebuffer(GL_FRAMEBUFFER, fbo);
    }

    @Override
    public void unbind() {
        GL30.glBindFramebuffer(GL_FRAMEBUFFER, 0);
    }

    @Override
    public void attachTexture(int point, Texture texture) {
        // Bind the frame buffer
        GL30.glBindFramebuffer(GL_FRAMEBUFFER, fbo);
        // Bind the texture to the frame buffer
        GL30.glFramebufferTexture2D(GL_FRAMEBUFFER, point, GL_TEXTURE_2D, texture.getId(), 0);
        // Add the attachment to the outputs if it is a colour type
        if (isColourAttachment(point)) {
            this.outputBuffers.add(point);
        }
        // Update the output buffers
        updateOutputBuffers();
        // Check to see if the frame buffer is complete
        if (GL30.glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
            throw new IllegalStateException("Unable to complete frame buffer!");
        }
        // Unbind the frame buffer
        GL30.glBindFramebuffer(GL_FRAMEBUFFER, 0);

        // Check for errors
        RenderUtil.checkGLError();
    }

    @Override
    public void attachBuffer(int point, RenderBuffer buffer) {
        // Bind the frame buffer
        GL30.glBindFramebuffer(GL_FRAMEBUFFER, fbo);
        // Attach the render buffer to the frame buffer
        GL30.glFramebufferRenderbuffer(GL_FRAMEBUFFER, point, GL_RENDERBUFFER, buffer.getId());
        RenderUtil.checkGLError();
        // Add the attachment to the outputs if it is a colour type
        if (isColourAttachment(point)) {
            this.outputBuffers.add(point);
        }
        // Update the output buffers
        updateOutputBuffers();
        // Check to see if the frame buffer is complete
        if (GL30.glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
            throw new IllegalStateException("Unable to complete frame buffer!");
        }
        // Unbind the frame buffer
        GL30.glBindFramebuffer(GL_FRAMEBUFFER, 0);

        // Check for errors
        RenderUtil.checkGLError();
    }

    @Override
    public void detach(int point) {
        // Bind the frame buffer
        GL30.glBindFramebuffer(GL_FRAMEBUFFER, fbo);
        // Detach the render buffer from the frame buffer
        GL30.glFramebufferRenderbuffer(GL_FRAMEBUFFER, point, GL_RENDERBUFFER, 0);
        // Remove the attachment from the outputs if it is a colour type
        if (isColourAttachment(point)) {
            this.outputBuffers.remove(point);
        }
        // Update the output buffers
        updateOutputBuffers();
        // Check to see if the frame buffer is complete
        if (GL30.glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
            throw new IllegalStateException("Unable to complete frame buffer!");
        }
        // Unbind the frame buffer
        GL30.glBindFramebuffer(GL_FRAMEBUFFER, 0);

        // Check for errors
        RenderUtil.checkGLError();
    }

    @Override
    public GLVersion getGLVersion() {
        return GLVersion.GL30;
    }
}