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

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

import com.xrbpowered.gl.Client;

public abstract class RenderTarget {

    public final int fbo;
    private final int width, height;

    protected RenderTarget(int fbo, int w, int h) {
        this.fbo = fbo;
        this.width = w;
        this.height = h;
    }

    public int getWidth() {
        return width;
    }

    public int getHeight() {
        return height;
    }

    public boolean isMultisample() {
        return false;
    }

    public void use() {
        GL11.glViewport(0, 0, getWidth(), getHeight());
        GL30.glBindFramebuffer(GL30.GL_FRAMEBUFFER, fbo);
    }

    public RenderTarget resolve() {
        return this;
    }

    public void destroy() {
    }

    public static final RenderTarget primaryBuffer = new RenderTarget(0, 0, 0) {
        @Override
        public int getWidth() {
            return Display.getWidth();
        }

        @Override
        public int getHeight() {
            return Display.getHeight();
        }
    };

    public static void blit(RenderTarget source, RenderTarget target, boolean filter) {
        GL30.glBindFramebuffer(GL30.GL_READ_FRAMEBUFFER, source.fbo);
        GL30.glBindFramebuffer(GL30.GL_DRAW_FRAMEBUFFER, target.fbo);
        //      System.out.printf("[%d] %dx%d -> [%d] %dx%d\n", source.fbo, source.getWidth(), source.getHeight(), target.fbo, target.getWidth(), target.getHeight());
        GL30.glBlitFramebuffer(0, 0, source.getWidth(), source.getHeight(), 0, 0, target.getWidth(),
                target.getHeight(), GL11.GL_COLOR_BUFFER_BIT, filter ? GL11.GL_LINEAR : GL11.GL_NEAREST);
        Client.checkError();
    }

    protected static void checkStatus() {
        int status = GL30.glCheckFramebufferStatus(GL30.GL_FRAMEBUFFER);
        if (status != GL30.GL_FRAMEBUFFER_COMPLETE)
            throw new RuntimeException(String.format("Framebuffer not complete: %04X", status));
    }

}