maspack.render.GL

Class FrameBufferObject

java.lang.Object

maspack.render.GL.FrameBufferObject

public class FrameBufferObject
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
static int	defaultMultiSamples
int	height
int	numMultiSamples
int	width
int	x
int	y

Constructor Summary

Constructors

Constructor and Description
FrameBufferObject(int w, int h) Create a framebuffer with the given dimensions
FrameBufferObject(int w, int h, int nsamples)
FrameBufferObject(int x, int y, int w, int h) Create a framebuffer with the given dimensions
FrameBufferObject(int x, int y, int w, int h, int nsamples, boolean gammaCorrection)

Method Summary

Modifier and Type	Method and Description
void	activate(com.jogamp.opengl.GL gl) Once activated() all further rendering will go to the framebuffer object.
int	checkStatus(com.jogamp.opengl.GL gl) Return the error code from the FBO
void	configure(com.jogamp.opengl.GL gl, int w, int h, int nsamples)
void	configure(com.jogamp.opengl.GL gl, int w, int h, int nsamples, boolean gammaCorrected)
void	configure(com.jogamp.opengl.GL gl, int x, int y, int w, int h, int nsamples, boolean gammaCorrected)
void	deactivate(com.jogamp.opengl.GL gl) Once deactivated all further rendering goes to the screen.
void	dispose(com.jogamp.opengl.GL gl) delete the framebufferobject and renderbufferobject
static java.lang.String	getFramebufferStatus(int statcode) Return a string representing the given fbo status code
int	getHeight()
java.nio.ByteBuffer	getPixels(com.jogamp.opengl.GL gl, int format)
int[]	getPixelsARGB(com.jogamp.opengl.GL gl) Uses the current GL object to get the RGBA pixels as bytes and converts them to ARGB pixels as integers.
int	getWidth()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

defaultMultiSamples

public static int defaultMultiSamples

x

public int x

y

public int y

width

public int width

height

public int height

numMultiSamples

public int numMultiSamples

Constructor Detail

FrameBufferObject

public FrameBufferObject(int x,
                         int y,
                         int w,
                         int h,
                         int nsamples,
                         boolean gammaCorrection)

FrameBufferObject

public FrameBufferObject(int w,
                         int h)

Create a framebuffer with the given dimensions

FrameBufferObject

public FrameBufferObject(int w,
                         int h,
                         int nsamples)

FrameBufferObject

public FrameBufferObject(int x,
                         int y,
                         int w,
                         int h)

Create a framebuffer with the given dimensions

Method Detail

configure

public void configure(com.jogamp.opengl.GL gl,
                      int w,
                      int h,
                      int nsamples)

configure

public void configure(com.jogamp.opengl.GL gl,
                      int w,
                      int h,
                      int nsamples,
                      boolean gammaCorrected)

configure

public void configure(com.jogamp.opengl.GL gl,
                      int x,
                      int y,
                      int w,
                      int h,
                      int nsamples,
                      boolean gammaCorrected)

checkStatus

public int checkStatus(com.jogamp.opengl.GL gl)

Return the error code from the FBO

getFramebufferStatus

public static java.lang.String getFramebufferStatus(int statcode)

Return a string representing the given fbo status code

activate

public void activate(com.jogamp.opengl.GL gl)

Once activated() all further rendering will go to the framebuffer object. This function sets the viewport to the width and height of the FBO. The deactivate() function will return the viewport to it's previous setting and turn off the FBO. To use:

      FBO.activate();
      .....   // draw something here
      FBO.deactivate();
 

See Also:

deactivate(com.jogamp.opengl.GL)

deactivate

public void deactivate(com.jogamp.opengl.GL gl)

Once deactivated all further rendering goes to the screen. The viewport is returned to its previous setting (before activate() was called).

See Also:

activate(com.jogamp.opengl.GL)

dispose

public void dispose(com.jogamp.opengl.GL gl)

delete the framebufferobject and renderbufferobject

getPixelsARGB

public int[] getPixelsARGB(com.jogamp.opengl.GL gl)

Uses the current GL object to get the RGBA pixels as bytes and converts them to ARGB pixels as integers. The RGBA bytes from OpenGL must be converted to the ARGB integers that Java's ImageIO class is expecting. Also, the y-axis must be flipped because OpengGl has the origin at the bottom left of a canvas and the Java AWT at the top left.

Parameters:

gl - the current GL object.

Returns:

The ARGB pixels as integers.

getPixels

public java.nio.ByteBuffer getPixels(com.jogamp.opengl.GL gl,
                                     int format)

getWidth

public int getWidth()

getHeight

public int getHeight()