fr.inria.insitu.glite.managers
Class ImageManager

java.lang.Object
  fr.inria.insitu.glite.managers.ImageManager

All Implemented Interfaces:

LiteManager

public class ImageManager
extends Object
implements LiteManager

ImageManager implements the image rendering mechanism.

Version:

$Revision: 1.3 $

Author:

Jean-Daniel Fekete

Field Summary

static String

KEY Key for access in PaintConext.

Fields inherited from interface fr.inria.insitu.glite.managers.LiteManager

KEY_CLIP, KEY_FONT, KEY_STENCIL, KEY_TESSELATOR, KEY_TRANSFORM, KEY_VERTEX_ARRAY

Constructor Summary

ImageManager(javax.media.opengl.GL gl)
Construct a new ImageManager.

Method Summary

void	dispose() Releases all the resources maintained by this object.
void	drawImage(BufferedImage img, int x, int y, int w, int h) Draws an image at location (x,y) of size (width, height).
void	drawImageFromTexture(Image img, int sx1, int sy1, int sx2, int sy2, Rectangle2D out) Draws an image by copying it first in a texture.
static ImageManager	get(LitePaintContext ctx) Returns an ImageManager from a LitePaintContext, creating it if needed.
Graphics2D	getGraphics()
BufferedImage	getImage()
int	getTexID()
static boolean	isOpaque(Image image) true if the image is known to have no alpha channel, and false if it may or may not have an alpha channel.
static double	linterp(double min, double max, double t) Compute a linear interpolation at parameter t from min to max.
void	reset() Resets the manager.

Methods inherited from class java.lang.Object

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

Field Detail

KEY

public static final String KEY

Key for access in PaintConext.

See Also:

Constant Field Values

Constructor Detail

ImageManager

public ImageManager(javax.media.opengl.GL gl)

Construct a new ImageManager.

Parameters:

gl - the GL context

Method Detail

get

public static ImageManager get(LitePaintContext ctx)

Returns an ImageManager from a LitePaintContext, creating it if needed.

Parameters:

ctx - the LitePaintContext

Returns:

an ImageManager

reset

public void reset()

Resets the manager.

Specified by:

reset in interface LiteManager

dispose

public void dispose()

Releases all the resources maintained by this object.

Specified by:

dispose in interface LiteManager

getImage

public BufferedImage getImage()

Returns:

the image

getGraphics

public Graphics2D getGraphics()

Returns:

the Graphics2D

getTexID

public int getTexID()

Returns:

the texture ID

drawImage

public void drawImage(BufferedImage img,
                      int x,
                      int y,
                      int w,
                      int h)

Draws an image at location (x,y) of size (width, height).

Use direct OpenGL pixel drawing. Translation is honored but not scale or rotation. Use the texture based image drawing if you use scaling or general transformations.

Parameters:

img - the image to draw

x - the x position where image should be drawn

y - the y position where image should be drawn

w - the width to draw

h - the height to draw

linterp

public static double linterp(double min,
                             double max,
                             double t)

Compute a linear interpolation at parameter t from min to max.

Parameters:

min - the min value

max - the max value

t - the parameter

Returns:

min + t * (max - min)

isOpaque

public static boolean isOpaque(Image image)

true if the image is known to have no alpha channel, and false if it may or may not have an alpha channel.

Parameters:

image - the image

Returns:

true if the image is known to have no alpha channel, and false if it may or may not have an alpha channel

drawImageFromTexture

public void drawImageFromTexture(Image img,
                                 int sx1,
                                 int sy1,
                                 int sx2,
                                 int sy2,
                                 Rectangle2D out)

Draws an image by copying it first in a texture.

Parameters:

img - the image

sx1 - left x

sy1 - lower y

sx2 - right x

sy2 - right y

out - bounds