Java Pbuffer.makeCurrent方法代码示例

import org.lwjgl.opengl.Pbuffer; //导入方法依赖的package包/类
/**
 * Initialise the PBuffer that will be used to render to
 * 
 * @throws SlickException
 */
private void init() throws SlickException {
	try {
		Texture tex = InternalTextureLoader.get().createTexture(image.getWidth(), image.getHeight(), image.getFilter());
		
		final RenderTexture rt = new RenderTexture(false, true, false, false, RenderTexture.RENDER_TEXTURE_2D, 0);
		pbuffer = new Pbuffer(screenWidth, screenHeight, new PixelFormat(8, 0, 0), rt, null);

		// Initialise state of the pbuffer context.
		pbuffer.makeCurrent();

		initGL();
		GL.glBindTexture(GL11.GL_TEXTURE_2D, tex.getTextureID());
		pbuffer.releaseTexImage(Pbuffer.FRONT_LEFT_BUFFER);
		image.draw(0,0);
		image.setTexture(tex);
		
		Display.makeCurrent();
	} catch (Exception e) {
		Log.error(e);
		throw new SlickException("Failed to create PBuffer for dynamic image. OpenGL driver failure?");
	}
}
 

import org.lwjgl.opengl.Pbuffer; //导入方法依赖的package包/类
/**
 * Initialise the PBuffer that will be used to render to
 * 
 * @throws SlickException
 */
private void init() throws SlickException {
	try {
		Texture tex = InternalTextureLoader.get().createTexture(image.getWidth(), image.getHeight(), image.getFilter());

		pbuffer = new Pbuffer(screenWidth, screenHeight, new PixelFormat(8, 0, 0), null, null);
		// Initialise state of the pbuffer context.
		pbuffer.makeCurrent();

		initGL();
		image.draw(0,0);
		GL11.glBindTexture(GL11.GL_TEXTURE_2D, tex.getTextureID());
		GL11.glCopyTexImage2D(GL11.GL_TEXTURE_2D, 0, GL11.GL_RGBA, 0, 0, 
							  tex.getTextureWidth(), 
							  tex.getTextureHeight(), 0);
		image.setTexture(tex);
		
		Display.makeCurrent();
	} catch (Exception e) {
		Log.error(e);
		throw new SlickException("Failed to create PBuffer for dynamic image. OpenGL driver failure?");
	}
}
 

import org.lwjgl.opengl.Pbuffer; //导入方法依赖的package包/类
/**
 * @return Maxiumum anti-aliasing samples supported. Required to have the LWJGL libraries loaded before calling
 */
public static int getMaximumAntialiasingSamples() {
    int result = 0;
    try {
        Pbuffer pb = new Pbuffer( 10, 10, new PixelFormat( 24, 8, 24, 8, 0 ), null );
        pb.makeCurrent();
        boolean supported = GLContext.getCapabilities().GL_ARB_multisample;
        if ( supported ) {
            result = GL11.glGetInteger( GL30.GL_MAX_SAMPLES );
        }
        pb.destroy();
    }
    catch( LWJGLException e ) {
        //e.printStackTrace();
    }
    return result;
}
 

import org.lwjgl.opengl.Pbuffer; //导入方法依赖的package包/类
/**
 * @return Maxiumum anti-aliasing samples supported. Required to have the LWJGL libraries loaded before calling
 */
public static int getMaximumAntialiasingSamples() {
    int result = 0;
    try {
        Pbuffer pb = new Pbuffer( 10, 10, new PixelFormat( 32, 0, 24, 8, 0 ), null );
        pb.makeCurrent();
        boolean supported = GLContext.getCapabilities().GL_ARB_multisample;
        if ( supported ) {
            result = GL11.glGetInteger( GL30.GL_MAX_SAMPLES );
        }
        pb.destroy();
    }
    catch ( LWJGLException e ) {
        //e.printStackTrace();
    }
    return result;
}
 

import org.lwjgl.opengl.Pbuffer; //导入方法依赖的package包/类
PbufferRenderer(int width, int height, PixelFormat format, boolean use_copyteximage, OffscreenRendererFactory factory) throws LWJGLException {
	super(width, height, use_copyteximage);
	this.factory = factory;
	pbuffer = new Pbuffer(width, height, format, null, null);
	GLStateStack state_stack = new GLStateStack();
	pbuffer.makeCurrent();
	GLStateStack.setCurrent(state_stack);
	try {
		pbuffer.makeCurrent();
		Renderer.dumpWindowInfo();
		init();
		if (!GLUtils.getGLBoolean(GL11.GL_DOUBLEBUFFER)) {
			GL11.glReadBuffer(GL11.GL_FRONT);
			GL11.glDrawBuffer(GL11.GL_FRONT);
		}
	} catch (LWJGLException e) {
		pbuffer.destroy();
		throw e;
	}
}
 

import org.lwjgl.opengl.Pbuffer; //导入方法依赖的package包/类
/**
 * Initialise the PBuffer that will be used to render to
 *
 * @throws SlickException
 */
private void init() throws SlickException {
    try {
        Texture tex = InternalTextureLoader.get().createTexture(image.getWidth(), image.getHeight(), image.getFilter());

        final RenderTexture rt = new RenderTexture(false, true, false, false, RenderTexture.RENDER_TEXTURE_2D, 0);
        pbuffer = new Pbuffer(screenWidth, screenHeight, new PixelFormat(8, 0, 0), rt, null);

        // Initialise state of the pbuffer context.
        pbuffer.makeCurrent();

        initGL();
        GL.glBindTexture(GL11.GL_TEXTURE_2D, tex.getTextureID());
        pbuffer.releaseTexImage(Pbuffer.FRONT_LEFT_BUFFER);

        if (image.getTexture()!=null)
            image.draw(0,0);
        Graphics.setCurrent(this); //this means you need to call flush() after getGraphics()
        image.setTexture(tex);

        Display.makeCurrent();
    } catch (Exception e) {
        Log.error(e);
        throw new SlickException("Failed to create PBuffer for dynamic image. OpenGL driver failure?");
    }
}
 

import org.lwjgl.opengl.Pbuffer; //导入方法依赖的package包/类
/**
 * Initialise the PBuffer that will be used to render to
 *
 * @throws SlickException
 */
private void init() throws SlickException {
    try {
        Texture tex = InternalTextureLoader.get().createTexture(image.getWidth(), image.getHeight(), image.getFilter());

        pbuffer = new Pbuffer(screenWidth, screenHeight, new PixelFormat(8, 0, 0), null, null);
        // Initialise state of the pbuffer context.
        pbuffer.makeCurrent();

        initGL();
        if (image.getTexture()!=null) {
            image.draw(0,0);
            GL11.glBindTexture(GL11.GL_TEXTURE_2D, tex.getTextureID());
            GL11.glCopyTexImage2D(GL11.GL_TEXTURE_2D, 0, GL11.GL_RGBA, 0, 0,
                                  tex.getTextureWidth(),
                                  tex.getTextureHeight(), 0);
        }
        Graphics.setCurrent(this); //this means you need to call flush() after getGraphics
        image.setTexture(tex);

        Display.makeCurrent();
    } catch (Exception e) {
        Log.error(e);
        throw new SlickException("Failed to create PBuffer for dynamic image. OpenGL driver failure?");
    }
}
 

import org.lwjgl.opengl.Pbuffer; //导入方法依赖的package包/类
protected void initInThread(){
    if ((Pbuffer.getCapabilities() & Pbuffer.PBUFFER_SUPPORTED) == 0){
        logger.severe("Offscreen surfaces are not supported.");
        return;
    }

    pixelFormat = new PixelFormat(settings.getBitsPerPixel(),
                                  0,
                                  settings.getDepthBits(),
                                  settings.getStencilBits(),
                                  settings.getSamples());
    
    width = settings.getWidth();
    height = settings.getHeight();
    try{
        Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
            public void uncaughtException(Thread thread, Throwable thrown) {
                listener.handleError("Uncaught exception thrown in "+thread.toString(), thrown);
            }
        });

        pbuffer = new Pbuffer(width, height, pixelFormat, null, null, createContextAttribs());
        pbuffer.makeCurrent();

        renderable.set(true);

        logger.info("Offscreen buffer created.");
        printContextInitInfo();
    } catch (LWJGLException ex){
        listener.handleError("Failed to create display", ex);
    } finally {
        // TODO: It is possible to avoid "Failed to find pixel format"
        // error here by creating a default display.
    }
    super.internalCreate();
    listener.initialize();
}
 

import org.lwjgl.opengl.Pbuffer; //导入方法依赖的package包/类
public static BufferedImage renderImage(int width, int height, Runnable renderer) throws LWJGLException, IOException {

        synchronized (PBUFFER_LOCK) {
            ContextAttribs contextAtrributes = new ContextAttribs(1, 1);
            contextAtrributes.withForwardCompatible(true);

            Pbuffer pbuffer = new Pbuffer(width, height, new PixelFormat(), null, null, contextAtrributes);
            pbuffer.makeCurrent();
            if (pbuffer.isBufferLost()) {
                pbuffer.destroy();
                return null;
            }
            IntBuffer pixels = ByteBuffer.allocateDirect(width * height * 4).order(ByteOrder.nativeOrder()).asIntBuffer();
            BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);

            renderer.run();

            glReadPixels(0, 0, width, height, GL_BGRA, GL_UNSIGNED_BYTE, pixels);

            for (int x = 0; x < width; x++) {
                for (int y = 0; y < height; y++) {
                    bi.setRGB(x, y, pixels.get((height - y - 1) * width + x));
                }
            }

            pbuffer.destroy();
            return bi;
        }
    }
 

import org.lwjgl.opengl.Pbuffer; //导入方法依赖的package包/类
protected void initInThread(){
        if ((Pbuffer.getCapabilities() & Pbuffer.PBUFFER_SUPPORTED) == 0){
            logger.severe("Offscreen surfaces are not supported.");
            return;
        }

        pixelFormat = new PixelFormat(settings.getBitsPerPixel(),
                                         0,
                                         settings.getDepthBits(),
                                         settings.getStencilBits(),
                                         settings.getSamples());
        width = settings.getWidth();
        height = settings.getHeight();
        try{
            Thread.setDefaultUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
                public void uncaughtException(Thread thread, Throwable thrown) {
                    listener.handleError("Uncaught exception thrown in "+thread.toString(), thrown);
                }
            });

            //String rendererStr = settings.getString("Renderer");
//            if (rendererStr.startsWith("LWJGL-OpenGL3")){
//                ContextAttribs attribs;
//                if (rendererStr.equals("LWJGL-OpenGL3.1")){
//                    attribs = new ContextAttribs(3, 1);
//                }else{
//                    attribs = new ContextAttribs(3, 0);
//                }
//                attribs.withForwardCompatible(true);
//                attribs.withDebug(false);
//                Display.create(pf, attribs);
//            }else{
            pbuffer = new Pbuffer(width, height, pixelFormat, null, null, createContextAttribs());
//            }

            pbuffer.makeCurrent();

            renderable.set(true);

            logger.info("Offscreen buffer created.");
            printContextInitInfo();
        } catch (LWJGLException ex){
            listener.handleError("Failed to create display", ex);
        } finally {
            // TODO: It is possible to avoid "Failed to find pixel format"
            // error here by creating a default display.
        }
        super.internalCreate();
        listener.initialize();
    }