refactor: fbo

app/src/main/java/chess/view/DDDrender/Window.java

@@ -9,14 +9,18 @@ import org.lwjgl.system.*;
 
 import chess.model.Coordinate;
 import chess.view.AssetManager;
+import chess.view.DDDrender.opengl.FrameBuffer;
 import chess.view.DDDrender.world.Entity;
 import chess.view.DDDrender.world.World;
 import common.Signal1;
 import imgui.ImFontConfig;
 import imgui.ImGui;
 import imgui.ImVec2;
+import imgui.flag.ImGuiWindowFlags;
 import imgui.gl3.ImGuiImplGl3;
 import imgui.glfw.ImGuiImplGlfw;
+import imgui.type.ImBoolean;
+import imgui.type.ImInt;
 
 import java.io.Closeable;
 import java.io.IOException;
@@ -57,6 +61,9 @@ public class Window implements Closeable {
 	public final Signal0 OnImGuiTopRender = new Signal0();
 	public final Signal0 OnImGuiBottomRender = new Signal0();
 
+	private ImInt detailLevel = new ImInt(10);
+	private ImBoolean pixelatedFrame = new ImBoolean(true);
+
 	public Window(Renderer renderer, World world, Camera camera) {
 		this.renderer = new Renderer();
 		this.cam = camera;
@@ -153,17 +160,17 @@ public class Window implements Closeable {
 					(vidmode.height() - pHeight.get(0)) / 2);
 
 			glfwSetWindowSize(window, vidmode.width(), vidmode.height());
+			
+			// Make the OpenGL context current
+			glfwMakeContextCurrent(window);
+			
+			GL.createCapabilities();
+			
+			initImGui();
+			
+			renderer.Init(vidmode.width(), vidmode.height());
 		} // the stack frame is popped automatically
 
-		// Make the OpenGL context current
-		glfwMakeContextCurrent(window);
-
-		GL.createCapabilities();
-
-		initImGui();
-
-		renderer.Init();
-
 		// Enable v-sync
 		glfwSwapInterval(1);
 
@@ -172,13 +179,14 @@ public class Window implements Closeable {
 	}
 
 	private void render(float delta, float aspectRatio) {
-		cam.setAspectRatio(1.0f);
-		GL30.glBindFramebuffer(GL30.GL_FRAMEBUFFER, 1);
-		glViewport(0, 0, 800, 800);
-		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // clear the framebuffer
+		final FrameBuffer frameBuffer = this.renderer.getFrameBuffer();
+
+		cam.setAspectRatio(frameBuffer.getAspectRatio());
+		frameBuffer.Bind();
+		frameBuffer.Clear();
 		renderer.Update(cam);
 		renderWorld();
-		GL30.glBindFramebuffer(GL30.GL_FRAMEBUFFER, 0);
+		frameBuffer.Unbind();
 	}
 
 	private void renderWorld() {
@@ -231,13 +239,25 @@ public class Window implements Closeable {
 	private void renderWindow() {
 		ImGui.showDemoWindow();
 
-		ImGui.begin("Main Window");
+		final FrameBuffer frameBuffer = this.renderer.getFrameBuffer();
+		final int frameWidth = (int) ImGui.getIO().getDisplaySizeX();
+		final int frameHeight = (int) (ImGui.getIO().getDisplaySizeY() * 8.0f / 10.0f);
+
+		ImGui.setNextWindowSize(ImGui.getIO().getDisplaySize());
+		ImGui.setNextWindowPos(new ImVec2());
+		ImGui.begin("Main Window", ImGuiWindowFlags.NoDecoration);
 		this.OnImGuiTopRender.emit();
 		ImVec2 mousePos = ImGui.getIO().getMousePos();
 		ImVec2 framePos = ImGui.getCursorScreenPos();
-		checkCursor(mousePos.x - framePos.x, 800 - (mousePos.y - framePos.y), 800, 800);
-		ImGui.image(1, new ImVec2(800, 800));
+		checkCursor(mousePos.x - framePos.x, frameHeight - (mousePos.y - framePos.y), frameWidth, frameHeight);
+		ImGui.image(frameBuffer.getRenderTexture(), new ImVec2(frameWidth, frameHeight));
 		this.OnImGuiBottomRender.emit();
+		if(ImGui.sliderInt("Niveau de détail", detailLevel.getData(), 1, 10)){
+			frameBuffer.Resize((int) ((float) frameWidth * detailLevel.get() / 10.0f), (int) ((float) frameHeight * detailLevel.get() / 10.0f));
+		}
+		if (ImGui.checkbox("Minecraft", pixelatedFrame)) {
+			frameBuffer.SetPixelScaling(pixelatedFrame.get());
+		}
 		ImGui.end();
 	}
 
@@ -254,8 +274,6 @@ public class Window implements Closeable {
 
 		glColor4f(1.0f, 0.0f, 0.0f, 1.0f);
 
-		double lastTime = glfwGetTime();
-
 		int width[] = new int[1];
 		int height[] = new int[1];
 		glfwGetWindowSize(window, width, height);
@@ -266,23 +284,19 @@ public class Window implements Closeable {
 
 			newFrame();
 
-			double currentTime = glfwGetTime();
-			float deltaTime = (float) (currentTime - lastTime);
-			render(deltaTime, (float) width[0] / (float) height[0]);
+			render(ImGui.getIO().getDeltaTime(), (float) width[0] / (float) height[0]);
 
 			renderWindow();
 			ImGui.render();
 			implGl3.renderDrawData(ImGui.getDrawData());
 
-			lastTime = glfwGetTime();
-
 			glfwSwapBuffers(window); // swap the color buffers
 
 			// Poll for window events. The key callback above will only be
 			// invoked during this call.
 			glfwPollEvents();
 
-			executeTasks(deltaTime);
+			executeTasks(ImGui.getIO().getDeltaTime());
 
 			glfwGetWindowSize(window, width, height);
 			glViewport(0, 0, width[0], height[0]);