290 lines
12 KiB
Java
290 lines
12 KiB
Java
package electrosphere.renderer.framebuffer;
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import electrosphere.engine.Globals;
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import electrosphere.renderer.OpenGLState;
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import electrosphere.renderer.texture.Texture;
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import java.nio.IntBuffer;
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import org.lwjgl.BufferUtils;
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import static org.lwjgl.opengl.GL11.GL_DEPTH_COMPONENT;
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import static org.lwjgl.opengl.GL11.GL_FLOAT;
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import static org.lwjgl.opengl.GL11.GL_LINEAR;
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import static org.lwjgl.opengl.GL11.GL_NEAREST;
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import static org.lwjgl.opengl.GL11.GL_NONE;
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import static org.lwjgl.opengl.GL11.GL_RED;
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import static org.lwjgl.opengl.GL11.GL_RGB;
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import static org.lwjgl.opengl.GL11.GL_RGBA;
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import static org.lwjgl.opengl.GL11.GL_SHORT;
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import static org.lwjgl.opengl.GL11.GL_TEXTURE_WRAP_S;
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import static org.lwjgl.opengl.GL11.GL_TEXTURE_WRAP_T;
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import static org.lwjgl.opengl.GL11.GL_UNSIGNED_BYTE;
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import static org.lwjgl.opengl.GL12.GL_CLAMP_TO_EDGE;
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import static org.lwjgl.opengl.GL13.GL_CLAMP_TO_BORDER;
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import static org.lwjgl.opengl.GL30.GL_COLOR_ATTACHMENT0;
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import static org.lwjgl.opengl.GL30.GL_COLOR_ATTACHMENT1;
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import static org.lwjgl.opengl.GL30.GL_DEPTH24_STENCIL8;
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import static org.lwjgl.opengl.GL30.GL_DEPTH_STENCIL_ATTACHMENT;
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import static org.lwjgl.opengl.GL30.GL_FRAMEBUFFER;
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import static org.lwjgl.opengl.GL30.GL_RENDERBUFFER;
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import static org.lwjgl.opengl.GL30.GL_HALF_FLOAT;
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import static org.lwjgl.opengl.GL30.glBindRenderbuffer;
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import static org.lwjgl.opengl.GL30.glFramebufferRenderbuffer;
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import static org.lwjgl.opengl.GL30.glGenRenderbuffers;
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import static org.lwjgl.opengl.GL30.glRenderbufferStorage;
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import static org.lwjgl.opengl.GL45.glNamedFramebufferDrawBuffer;
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import static org.lwjgl.opengl.GL45.glNamedFramebufferDrawBuffers;
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import static org.lwjgl.opengl.GL45.glNamedFramebufferReadBuffer;
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/**
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* Utilities for framebuffer creation
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*/
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public class FramebufferUtils {
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public static Texture generateScreenTextureColor(OpenGLState openGLState, int width, int height){
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Texture texture = new Texture();
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texture.glTexImage2D(openGLState, width, height, GL_RGB, GL_UNSIGNED_BYTE);
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texture.setMinFilter(GL_LINEAR);
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texture.setMagFilter(GL_LINEAR);
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//these make sure the texture actually clamps to the borders of the quad
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texture.setWrap(GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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texture.setWrap(GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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texture.checkStatus(openGLState);
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return texture;
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}
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public static Texture generateScreenTextureColorAlpha(OpenGLState openGLState, int width, int height){
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Texture texture = new Texture();
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texture.glTexImage2D(openGLState, width, height, GL_RGBA, GL_UNSIGNED_BYTE);
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texture.setMinFilter(GL_LINEAR);
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texture.setMagFilter(GL_LINEAR);
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//these make sure the texture actually clamps to the borders of the quad
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texture.setWrap(GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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texture.setWrap(GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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texture.checkStatus(openGLState);
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return texture;
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}
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public static Texture generateScreenTextureDepth(OpenGLState openGLState, int width, int height){
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Texture texture = new Texture();
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texture.glTexImage2D(openGLState, width, height, GL_DEPTH_COMPONENT, GL_FLOAT);
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texture.checkStatus(openGLState);
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return texture;
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}
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public static Framebuffer generateScreenTextureFramebuffer(OpenGLState openGLState, int width, int height, Texture colorTexture, Texture depthTexture){
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Framebuffer buffer = new Framebuffer();
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//texture
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// int texture = glGenTextures();
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// glBindTexture(GL_TEXTURE_2D,texture);
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// glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, Globals.WINDOW_WIDTH, Globals.WINDOW_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
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// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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// //these make sure the texture actually clamps to the borders of the quad
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// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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//bind texture to fbo
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buffer.setMipMapLevel(0);
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buffer.attachTexture(openGLState,colorTexture);
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buffer.setDepthAttachment(openGLState,depthTexture.getTexturePointer());
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//check make sure compiled
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buffer.checkStatus();
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return buffer;
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}
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public static Framebuffer generateScreenTextureFramebuffer(OpenGLState openGLState, int width, int height, Texture colorTexture){
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Framebuffer buffer = new Framebuffer();
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//texture
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// int texture = glGenTextures();
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// glBindTexture(GL_TEXTURE_2D,texture);
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// glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, Globals.WINDOW_WIDTH, Globals.WINDOW_HEIGHT, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
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// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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// //these make sure the texture actually clamps to the borders of the quad
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// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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// glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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//bind texture to fbo
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buffer.setMipMapLevel(0);
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buffer.attachTexture(openGLState,colorTexture.getTexturePointer());
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//check make sure compiled
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buffer.checkStatus();
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return buffer;
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}
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public static Framebuffer generateScreensizeTextureFramebuffer(OpenGLState openGLState){
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Framebuffer buffer = new Framebuffer();
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buffer.bind(openGLState);
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//texture
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Texture texture = new Texture();
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texture.glTexImage2D(openGLState, Globals.WINDOW_WIDTH, Globals.WINDOW_HEIGHT, GL_RGB, GL_UNSIGNED_BYTE);
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texture.setMinFilter(GL_LINEAR);
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texture.setMagFilter(GL_LINEAR);
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//these make sure the texture actually clamps to the borders of the quad
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texture.setWrap(GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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texture.setWrap(GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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texture.checkStatus(openGLState);
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//bind texture to fbo
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buffer.setMipMapLevel(0);
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buffer.attachTexture(openGLState,texture);
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//renderbuffer
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int renderBuffer = glGenRenderbuffers();
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glBindRenderbuffer(GL_RENDERBUFFER, renderBuffer);
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glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, Globals.WINDOW_WIDTH, Globals.WINDOW_HEIGHT);
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//bind rbo to fbo
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glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, renderBuffer);
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//check make sure compiled
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buffer.checkStatus();
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return buffer;
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}
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public static Framebuffer generateTextureFramebuffer(OpenGLState openGLState, int width, int height){
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Framebuffer buffer = new Framebuffer();
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buffer.bind(openGLState);
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//texture
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Texture texture = new Texture();
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texture.glTexImage2D(openGLState, width, height, GL_RGBA, GL_UNSIGNED_BYTE);
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texture.setMinFilter(GL_LINEAR);
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texture.setMagFilter(GL_LINEAR);
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//these make sure the texture actually clamps to the borders of the quad
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texture.setWrap(GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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texture.setWrap(GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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texture.checkStatus(openGLState);
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//bind texture to fbo
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buffer.setMipMapLevel(0);
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buffer.attachTexture(openGLState,texture);
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//renderbuffer
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int renderBuffer = glGenRenderbuffers();
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glBindRenderbuffer(GL_RENDERBUFFER, renderBuffer);
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glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, width, height);
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//bind rbo to fbo
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glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_STENCIL_ATTACHMENT, GL_RENDERBUFFER, renderBuffer);
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//check make sure compiled
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buffer.checkStatus();
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return buffer;
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}
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public static Renderbuffer generateScreensizeStencilDepthRenderbuffer(OpenGLState openGLState){
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Renderbuffer buffer = new Renderbuffer();
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buffer.bind();
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glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH24_STENCIL8, Globals.WINDOW_WIDTH, Globals.WINDOW_HEIGHT);
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Globals.renderingEngine.checkError();
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return buffer;
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}
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static int depthMapWidth = 4096;
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static int depthMapHeight = 4096;
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public static Framebuffer generateDepthBuffer(OpenGLState openGLState){
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Framebuffer buffer = new Framebuffer();
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buffer.bind(openGLState);
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//texture
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Texture texture = new Texture();
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texture.glTexImage2D(openGLState, depthMapWidth, depthMapHeight, GL_DEPTH_COMPONENT, GL_FLOAT);
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texture.setMinFilter(GL_NEAREST);
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texture.setMagFilter(GL_NEAREST);
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texture.setWrap(GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
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texture.setWrap(GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
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texture.setBorderColor(new float[]{ 1.0f, 1.0f, 1.0f, 1.0f });
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texture.checkStatus(openGLState);
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//bind texture to fbo
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buffer.setMipMapLevel(0);
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buffer.setDepthAttachment(openGLState,texture.getTexturePointer());
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glNamedFramebufferDrawBuffer(buffer.getFramebufferPointer(), GL_NONE);
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glNamedFramebufferReadBuffer(buffer.getFramebufferPointer(), GL_NONE);
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//check make sure compiled
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buffer.checkStatus();
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return buffer;
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}
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public static Texture generateDepthBufferTexture(OpenGLState openGLState, int width, int height){
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Texture texture = new Texture();
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texture.glTexImage2D(openGLState, width, height, GL_DEPTH_COMPONENT, GL_SHORT);
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texture.setMinFilter(GL_NEAREST);
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texture.setMagFilter(GL_NEAREST);
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texture.setWrap(GL_TEXTURE_WRAP_S, GL_CLAMP_TO_BORDER);
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texture.setWrap(GL_TEXTURE_WRAP_T, GL_CLAMP_TO_BORDER);
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texture.setBorderColor(new float[]{ 1.0f, 1.0f, 1.0f, 1.0f });
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texture.checkStatus(openGLState);
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return texture;
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}
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public static Framebuffer generateDepthBuffer(OpenGLState openGLState, int width, int height, Texture texture){
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Framebuffer buffer = new Framebuffer();
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buffer.bind(openGLState);
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//bind texture to fbo
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buffer.setMipMapLevel(0);
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buffer.setDepthAttachment(openGLState,texture.getTexturePointer());
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glNamedFramebufferDrawBuffer(buffer.getFramebufferPointer(), GL_NONE);
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glNamedFramebufferReadBuffer(buffer.getFramebufferPointer(), GL_NONE);
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//check make sure compiled
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buffer.checkStatus();
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return buffer;
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}
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public static Texture generateOITAccumulatorTexture(OpenGLState openGLState, int width, int height){
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Texture texture = new Texture();
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texture.setMinFilter(GL_LINEAR);
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texture.setMagFilter(GL_LINEAR);
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texture.glTexImage2D(openGLState, width, height, GL_RGBA, GL_HALF_FLOAT);
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texture.checkStatus(openGLState);
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return texture;
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}
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public static Texture generateOITRevealageTexture(OpenGLState openGLState, int width, int height){
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Texture texture = new Texture();
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texture.setMinFilter(GL_LINEAR);
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texture.setMagFilter(GL_LINEAR);
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texture.glTexImage2D(openGLState, width, height, GL_RED, GL_FLOAT);
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texture.checkStatus(openGLState);
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return texture;
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}
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public static Framebuffer generateOITFramebuffer(OpenGLState openGLState, int width, int height, Texture accumulatorTex, Texture revealageTex, Texture depthTexture){
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Framebuffer buffer = new Framebuffer();
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buffer.bind(openGLState);
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//bind texture to fbo
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buffer.setMipMapLevel(0);
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buffer.attachTexture(openGLState,accumulatorTex.getTexturePointer(),0);
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buffer.attachTexture(openGLState,revealageTex.getTexturePointer(),1);
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buffer.setDepthAttachment(openGLState,depthTexture.getTexturePointer());
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// const GLenum transparentDrawBuffers[] = { GL_COLOR_ATTACHMENT0, GL_COLOR_ATTACHMENT1 };
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// glDrawBuffers(2, transparentDrawBuffers);
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IntBuffer drawBuffers = BufferUtils.createIntBuffer(2);
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drawBuffers.put(GL_COLOR_ATTACHMENT0);
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drawBuffers.put(GL_COLOR_ATTACHMENT1);
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drawBuffers.flip();
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glNamedFramebufferDrawBuffers(buffer.getFramebufferPointer(),drawBuffers);
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//check make sure compiled
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buffer.checkStatus();
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return buffer;
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}
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}
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