111 lines
3.3 KiB
Java
111 lines
3.3 KiB
Java
|
/*
|
||
|
* opsu! - an open-source osu! client
|
||
|
* Copyright (C) 2014, 2015 Jeffrey Han
|
||
|
*
|
||
|
* opsu! is free software: you can redistribute it and/or modify
|
||
|
* it under the terms of the GNU General Public License as published by
|
||
|
* the Free Software Foundation, either version 3 of the License, or
|
||
|
* (at your option) any later version.
|
||
|
*
|
||
|
* opsu! is distributed in the hope that it will be useful,
|
||
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
|
* GNU General Public License for more details.
|
||
|
*
|
||
|
* You should have received a copy of the GNU General Public License
|
||
|
* along with opsu!. If not, see <http://www.gnu.org/licenses/>.
|
||
|
*/
|
||
|
package itdelatrisu.opsu.render;
|
||
|
|
||
|
import java.nio.ByteBuffer;
|
||
|
import org.lwjgl.opengl.GL11;
|
||
|
import org.lwjgl.opengl.GL20;
|
||
|
import org.lwjgl.opengl.GL30;
|
||
|
import org.lwjgl.opengl.GL32;
|
||
|
|
||
|
/**
|
||
|
*
|
||
|
* Represents a rendertarget. For now this maps to an OpenGL FBO via LWJGL
|
||
|
*/
|
||
|
public class Rendertarget {
|
||
|
public final int width;
|
||
|
public final int height;
|
||
|
private final int fboID;
|
||
|
private final int textureID;
|
||
|
|
||
|
/**
|
||
|
* Create a new FBO
|
||
|
*
|
||
|
* @param width
|
||
|
* @param height
|
||
|
*/
|
||
|
private Rendertarget(int width, int height)
|
||
|
{
|
||
|
this.width = width;
|
||
|
this.height = height;
|
||
|
fboID = GL30.glGenFramebuffers();
|
||
|
textureID = GL11.glGenTextures();
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Bind this rendertarget as the primary framebuffer.
|
||
|
*/
|
||
|
public void bind()
|
||
|
{
|
||
|
GL30.glBindFramebuffer(GL30.GL_DRAW_FRAMEBUFFER, fboID);
|
||
|
}
|
||
|
|
||
|
//use judiciously, try to avoid if possible and consider adding a method to
|
||
|
//this class if you find yourself calling this repeatedly
|
||
|
public int getID()
|
||
|
{
|
||
|
return fboID;
|
||
|
}
|
||
|
|
||
|
//try not to use, could be moved into seperate class
|
||
|
public int getTextureID()
|
||
|
{
|
||
|
return textureID;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Bind the default framebuffer
|
||
|
*/
|
||
|
public static void unbind()
|
||
|
{
|
||
|
GL30.glBindFramebuffer(GL30.GL_DRAW_FRAMEBUFFER, 0);
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* Creates a Rendertarget with a Texture that it renders the color buffer in
|
||
|
* and a renderbuffer that it renders the depth to.
|
||
|
*/
|
||
|
public static Rendertarget createRTTFramebuffer(int width, int height)
|
||
|
{
|
||
|
int old_framebuffer = GL11.glGetInteger(GL30.GL_READ_FRAMEBUFFER_BINDING);
|
||
|
int old_texture = GL11.glGetInteger(GL11.GL_TEXTURE_BINDING_2D);
|
||
|
Rendertarget buffer = new Rendertarget(width,height);
|
||
|
buffer.bind();
|
||
|
|
||
|
int fboTexture = buffer.textureID;
|
||
|
GL11.glBindTexture(GL11.GL_TEXTURE_2D, fboTexture);
|
||
|
GL11.glTexImage2D(GL11.GL_TEXTURE_2D, 0, 4, width, height, 0, GL11.GL_RGBA, GL11.GL_UNSIGNED_INT, (ByteBuffer) null);
|
||
|
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);
|
||
|
|
||
|
int fboDepth = GL30.glGenRenderbuffers();
|
||
|
GL30.glBindRenderbuffer(GL30.GL_RENDERBUFFER, fboDepth);
|
||
|
GL30.glRenderbufferStorage(GL30.GL_RENDERBUFFER, GL11.GL_DEPTH_COMPONENT, width, height);
|
||
|
GL30.glFramebufferRenderbuffer(GL30.GL_FRAMEBUFFER, GL30.GL_DEPTH_ATTACHMENT, GL30.GL_RENDERBUFFER, fboDepth);
|
||
|
|
||
|
GL32.glFramebufferTexture(GL30.GL_FRAMEBUFFER, GL30.GL_COLOR_ATTACHMENT0, fboTexture, 0);
|
||
|
GL20.glDrawBuffers(GL30.GL_COLOR_ATTACHMENT0);
|
||
|
|
||
|
GL11.glBindTexture(GL11.GL_TEXTURE_2D, old_texture);
|
||
|
GL30.glBindFramebuffer(GL30.GL_DRAW_FRAMEBUFFER, old_framebuffer);
|
||
|
|
||
|
|
||
|
return buffer;
|
||
|
}
|
||
|
}
|