Fixed rendering issues on Linux/AMD

Author: RaphiMC

src/main/java/net/raphimc/noteblocktool/frames/visualizer/DropRenderer.java

@@ -128,8 +128,6 @@ public void init() {
         this.pianoKeyLastPlayed = new long[PIANO_KEY_COUNT];
         this.pianoKeyLastColors = new Color[PIANO_KEY_COUNT];
         this.lastFpsUpdateTime = System.nanoTime();
-        final float[] clearColor = Color.GRAY.toRGBAF();
-        ThinGL.getImplementation().getCurrentFramebuffer().setClearColor(clearColor[0], clearColor[1], clearColor[2], clearColor[3]);
     }
 
     public void delete() {

src/main/java/net/raphimc/noteblocktool/frames/visualizer/VisualizerWindow.java

@@ -86,6 +86,7 @@ private VisualizerWindow() {
             GL11C.glEnable(GL11C.GL_DEPTH_TEST);
             GL11C.glDepthFunc(GL11C.GL_LEQUAL);
             final TextureFramebuffer mainFramebuffer = new TextureFramebuffer();
+            mainFramebuffer.setClearColor(0.5F, 0.5F, 0.5F, 0.5F);
             final Matrix4fStack positionMatrix = new Matrix4fStack(8);
 
             while (/*!GLFW.glfwWindowShouldClose(this.window)*/true) {
@@ -98,6 +99,7 @@ private VisualizerWindow() {
                 }
                 positionMatrix.popMatrix();
 
+                mainFramebuffer.unbind();
                 mainFramebuffer.blitTo(WindowFramebuffer.INSTANCE, true, false, false);
                 ThinGL.endFrame();
                 GLFW.glfwSwapBuffers(this.window);