class FBOTest {
    public static void main(String[] args) {
        int width = 400;
        int height = 400;
        int fps = 60;

        try {
            Display.setDisplayMode(new DisplayMode(width, height));
            Display.create();
            Display.setVSyncEnabled(true);

            glEnable(GL_TEXTURE_2D);
            glEnable(GL_BLEND);
            glDisable(GL_DEPTH_TEST);
            glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
            glViewport(0, 0, width, height);
            glClearColor(0.5f, 0.5f, 0.5f, 1.0f);

            glMatrixMode(GL_PROJECTION);
            glLoadIdentity();
            glOrtho(0, width, height, 0, -1, 1);

            glMatrixMode(GL_MODELVIEW);
            glLoadIdentity();
            glTranslatef(0.375f, 0.375f, 0.0f);

            // Initialize frame buffer object
            int fbo = glGenFramebuffersEXT();

            // Set up a texture to render to
            int texWidth = 2;
            int texHeight = 2;
            int texture = glGenTextures();
            ByteBuffer buffer =
                BufferUtils.createByteBuffer(texWidth*texHeight*8);
            glBindTexture(GL_TEXTURE_2D, texture);
            glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
            glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
            glTexImage2D(
                GL_TEXTURE_2D,
                0,
                GL_RGBA8,
                texWidth,
                texHeight,
                0,
                GL_RGBA,
                GL_UNSIGNED_BYTE,
                buffer);
            glBindTexture(GL_TEXTURE_2D, 0);

            while(!Display.isCloseRequested()) {
                // Render to the texture
                glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, fbo);
                glFramebufferTexture2DEXT(
                    GL_FRAMEBUFFER_EXT,
                    GL_COLOR_ATTACHMENT0_EXT,
                    GL_TEXTURE_2D,
                    texture,
                    0);

                glViewport(0, 0, texWidth, texHeight);
                glMatrixMode(GL_PROJECTION);
                glLoadIdentity();
                glOrtho(0, texWidth, texHeight, 0, -1, 1);
                glMatrixMode(GL_MODELVIEW);
                glLoadIdentity();
                glTranslatef(0.375f, 0.375f, 0.0f);

                // Draw a square in the top left corner
                glColor3f(
                    (float) Math.random(),
                    (float) Math.random(),
                    (float) Math.random());
                glBegin(GL_QUADS);
                {
                    int xCenter = texWidth/2;
                    int yCenter = texHeight/2;
                    glVertex2i(0, 0);
                    glVertex2i(xCenter, 0);
                    glVertex2i(xCenter, yCenter);
                    glVertex2i(0, yCenter);

                }
                glEnd();

                // Render to the screen
                glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, 0);

                glClear(GL_COLOR_BUFFER_BIT);

                // Draw a square using the texture
                glBindTexture(GL_TEXTURE_2D, texture);
                glColor3f(1.0f, 1.0f, 1.0f);
                glBegin(GL_QUADS);
                {
                    glTexCoord2f(0.0f, 0.0f);
                    glVertex2i(0, 0);
                    glTexCoord2f(1.0f, 0.0f);
                    glVertex2i(width, 0);
                    glTexCoord2f(1.0f, 1.0f);
                    glVertex2i(width, height);
                    glTexCoord2f(0.0f, 1.0f);
                    glVertex2i(0, height);
                }
                glEnd();

                Display.update();
                Display.sync(fps);
            }
        } catch(LWJGLException e) {
            e.printStackTrace();
        } finally {
            Display.destroy();
        }
    }
}