protected void setDepthFunc(DrawContext dc, OrderedIcon uIcon, Vec4 screenPoint) {
GL gl = dc.getGL();
if (uIcon.icon.isAlwaysOnTop()) {
gl.glDepthFunc(GL.GL_ALWAYS);
return;
}
Position eyePos = dc.getView().getEyePosition();
if (eyePos == null) {
gl.glDepthFunc(GL.GL_ALWAYS);
return;
}
double altitude = eyePos.getElevation();
if (altitude < (dc.getGlobe().getMaxElevation() * dc.getVerticalExaggeration())) {
double depth = screenPoint.z - (8d * 0.00048875809d);
depth = depth < 0d ? 0d : (depth > 1d ? 1d : depth);
gl.glDepthFunc(GL.GL_LESS);
gl.glDepthRange(depth, depth);
} else if (uIcon.eyeDistance > uIcon.horizonDistance) {
gl.glDepthFunc(GL.GL_EQUAL);
gl.glDepthRange(1d, 1d);
} else {
gl.glDepthFunc(GL.GL_ALWAYS);
}
}
/**
* Sets a specified texture's OpenGL <code>Texture</code> parameters.
*
* @param dc the current draw context.
* @param texture the texture whose parameters to set.
*/
protected void setTextureParameters(DrawContext dc, Texture texture) {
// Enable the appropriate mip-mapping texture filters if the caller has specified that
// mip-mapping should be
// enabled, and the texture itself supports mip-mapping.
boolean useMipMapFilter =
this.useMipMaps
&& (this.getTextureData().getMipmapData() != null
|| texture.isUsingAutoMipmapGeneration());
GL gl = dc.getGL();
gl.glTexParameteri(
GL.GL_TEXTURE_2D,
GL.GL_TEXTURE_MIN_FILTER,
useMipMapFilter ? GL.GL_LINEAR_MIPMAP_LINEAR : GL.GL_LINEAR);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAG_FILTER, GL.GL_LINEAR);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_S, GL.GL_CLAMP_TO_EDGE);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_WRAP_T, GL.GL_CLAMP_TO_EDGE);
if (this.isUseAnisotropy() && useMipMapFilter) {
double maxAnisotropy = dc.getGLRuntimeCapabilities().getMaxTextureAnisotropy();
if (dc.getGLRuntimeCapabilities().isUseAnisotropicTextureFilter() && maxAnisotropy >= 2.0) {
gl.glTexParameterf(
GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAX_ANISOTROPY_EXT, (float) maxAnisotropy);
}
}
}
protected void applyColor(DrawContext dc, java.awt.Color color, double opacity) {
if (dc.isPickingMode()) return;
double finalOpacity = opacity * (color.getAlpha() / 255.0);
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
OGLUtil.applyColor(gl, color, finalOpacity, true);
}
protected void drawIconsInBatch(DrawContext dc, OrderedIcon uIcon) {
this.drawIcon(dc, uIcon);
// Draw as many as we can in a batch to save ogl state switching.
Object nextItem = dc.peekOrderedRenderables();
while (nextItem != null && nextItem instanceof OrderedIcon) {
OrderedIcon oi = (OrderedIcon) nextItem;
if (oi.getRenderer() != this) return;
dc.pollOrderedRenderables(); // take it off the queue
this.drawIcon(dc, oi);
nextItem = dc.peekOrderedRenderables();
}
}
protected void endDrawIcons(DrawContext dc) {
if (dc.isPickingMode()) this.pickSupport.endPicking(dc);
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
if (dc.isPickingMode()) {
gl.glTexEnvf(GL2.GL_TEXTURE_ENV, GL2.GL_TEXTURE_ENV_MODE, OGLUtil.DEFAULT_TEX_ENV_MODE);
gl.glTexEnvf(GL2.GL_TEXTURE_ENV, GL2.GL_SRC0_RGB, OGLUtil.DEFAULT_SRC0_RGB);
gl.glTexEnvf(GL2.GL_TEXTURE_ENV, GL2.GL_COMBINE_RGB, OGLUtil.DEFAULT_COMBINE_RGB);
}
gl.glBindTexture(GL.GL_TEXTURE_2D, 0);
this.oglStackHandler.pop(gl);
}
protected void drawToolTip(
DrawContext dc,
java.awt.Rectangle viewport,
String text,
int x,
int y,
ToolTipAttributes attributes) {
java.awt.geom.Rectangle2D textBounds = this.computeTextBounds(dc, text, attributes.getFont());
java.awt.geom.Rectangle2D bgBounds =
this.computeBackgroundBounds(
dc, textBounds.getWidth(), textBounds.getHeight(), attributes.getInsets());
java.awt.Point screenPoint = this.adjustDrawPointToViewport(x, y, bgBounds, viewport);
java.awt.geom.Point2D textTranslation =
this.computeTextTranslation(dc, textBounds, attributes.getInsets());
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
OGLStackHandler stackHandler = new OGLStackHandler();
stackHandler.pushModelview(gl);
try {
gl.glTranslated(
screenPoint.getX() + bgBounds.getX(), screenPoint.getY() + bgBounds.getY(), 0);
this.drawToolTipInterior(dc, bgBounds.getWidth(), bgBounds.getHeight(), attributes);
this.drawToolTipOutline(dc, bgBounds.getWidth(), bgBounds.getHeight(), attributes);
gl.glTranslated(textTranslation.getX(), textTranslation.getY(), 0);
this.drawToolTipText(dc, text, 0, 0, attributes);
} finally {
stackHandler.pop(gl);
}
}
// X-PATCH Marjan
// extracted skip conditions into an overrideable method
protected boolean meetsRenderCriteria(
DrawContext dc, WWIcon icon, Vec4 iconPoint, double eyeDistance) {
if (this.isHorizonClippingEnabled() && eyeDistance > dc.getView().getHorizonDistance()) {
return false; // don't render horizon-clipped icons
}
// If enabled, eliminate icons outside the view volume. Primarily used to control icon
// visibility beyond
// the view volume's far clipping plane.
if (this.isViewClippingEnabled()
&& !dc.getView().getFrustumInModelCoordinates().contains(iconPoint)) {
return false; // don't render frustum-clipped icons
}
return true;
}
protected void addToolTip(DrawContext dc, WWIcon icon, Vec4 iconPoint) {
if (icon.getToolTipFont() == null && icon.getToolTipText() == null) return;
Vec4 screenPoint = dc.getView().project(iconPoint);
if (screenPoint == null) return;
if (icon.getToolTipOffset() != null) screenPoint = screenPoint.add3(icon.getToolTipOffset());
OrderedText tip =
new OrderedText(
icon.getToolTipText(),
icon.getToolTipFont(),
screenPoint,
icon.getToolTipTextColor(),
0d);
dc.addOrderedRenderable(tip);
}
protected void beginDrawIcons(DrawContext dc) {
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
this.oglStackHandler.clear();
int attributeMask =
GL2.GL_DEPTH_BUFFER_BIT // for depth test, depth mask and depth func
| GL2.GL_TRANSFORM_BIT // for modelview and perspective
| GL2.GL_VIEWPORT_BIT // for depth range
| GL2.GL_CURRENT_BIT // for current color
| GL2.GL_COLOR_BUFFER_BIT // for alpha test func and ref, and blend
| GL2.GL_DEPTH_BUFFER_BIT // for depth func
| GL2.GL_ENABLE_BIT; // for enable/disable changes
this.oglStackHandler.pushAttrib(gl, attributeMask);
// Apply the depth buffer but don't change it.
if ((!dc.isDeepPickingEnabled())) gl.glEnable(GL.GL_DEPTH_TEST);
gl.glDepthMask(false);
// Suppress any fully transparent image pixels
gl.glEnable(GL2.GL_ALPHA_TEST);
gl.glAlphaFunc(GL2.GL_GREATER, 0.001f);
// Load a parallel projection with dimensions (viewportWidth, viewportHeight)
this.oglStackHandler.pushProjectionIdentity(gl);
gl.glOrtho(
0d, dc.getView().getViewport().width, 0d, dc.getView().getViewport().height, -1d, 1d);
this.oglStackHandler.pushModelview(gl);
this.oglStackHandler.pushTexture(gl);
if (dc.isPickingMode()) {
this.pickSupport.beginPicking(dc);
// Set up to replace the non-transparent texture colors with the single pick color.
gl.glEnable(GL.GL_TEXTURE_2D);
gl.glTexEnvf(GL2.GL_TEXTURE_ENV, GL2.GL_TEXTURE_ENV_MODE, GL2.GL_COMBINE);
gl.glTexEnvf(GL2.GL_TEXTURE_ENV, GL2.GL_SRC0_RGB, GL2.GL_PREVIOUS);
gl.glTexEnvf(GL2.GL_TEXTURE_ENV, GL2.GL_COMBINE_RGB, GL2.GL_REPLACE);
} else {
gl.glEnable(GL.GL_TEXTURE_2D);
gl.glEnable(GL.GL_BLEND);
gl.glBlendFunc(GL.GL_ONE, GL.GL_ONE_MINUS_SRC_ALPHA);
}
}
protected void drawToolTipInterior(
DrawContext dc, double width, double height, ToolTipAttributes attributes) {
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
this.applyColor(dc, attributes.getInteriorColor(), attributes.getInteriorOpacity());
// Draw a filled rectangle with the background dimensions.
gl.glRectd(0, 0, width, height);
}
protected void doRender(DrawContext dc, String text, int x, int y) {
OGLStackHandler stackHandler = new OGLStackHandler();
this.beginRendering(dc, stackHandler);
try {
this.draw(dc, dc.getView().getViewport(), text, x, y);
} finally {
this.endRendering(dc, stackHandler);
}
}
protected void endRendering(DrawContext dc, OGLStackHandler stackHandler) {
if (dc == null) {
String message = Logging.getMessage("nullValue.DrawContextIsNull");
Logging.logger().fine(message);
throw new IllegalArgumentException(message);
}
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
stackHandler.pop(gl);
}
/**
* If this instance's image source is a <code>BufferedImage</code>, creates and returns the
* texture, otherwise creates a task in a separate thread to retrieve it from its local or remote
* location.
*
* @param dc the current draw context.
* @return the new texture, or null if the texture is not yet available.
*/
protected Texture requestTexture(DrawContext dc) {
if (this.isBufferedImageSource()) return this.makeBufferedImageTexture(dc);
if (this.getTextureData() != null && this.getTexture(dc) == null)
return this.makeTextureFromTextureData(dc);
if (WorldWind.getTaskService().isFull()) return null;
Runnable task = this.createRequestTask();
if (WorldWind.getTaskService().contains(task)) return null;
// Use either the current layer or the layer list as the listener to notify when the request
// completes. The
// latter is used when the image source is requested during ordered rendering and the current
// layer is null.
this.listener = dc.getCurrentLayer() != null ? dc.getCurrentLayer() : dc.getLayers();
WorldWind.getTaskService().addTask(task);
return null;
}
protected void pickIconsInBatch(DrawContext dc, OrderedIcon uIcon) {
this.drawIcon(dc, uIcon);
// Draw as many as we can in a batch to save ogl state switching.
// Note that there's a further qualification here than in render(): only items associated with
// the
// same layer can be batched because the pick resolution step at the end of batch rendering
// associates the item's layer with the resolved picked object.
Object nextItem = dc.peekOrderedRenderables();
while (nextItem != null
&& nextItem instanceof OrderedIcon
&& ((OrderedIcon) nextItem).layer == uIcon.layer) {
OrderedIcon oi = (OrderedIcon) nextItem;
if (oi.getRenderer() != this) return;
dc.pollOrderedRenderables(); // take it off the queue
this.drawIcon(dc, oi);
nextItem = dc.peekOrderedRenderables();
}
}
/**
* Returns the {@link Texture} associated with this instance.
*
* @param dc the current draw context.
* @return this instance's texture, or null if the texture does not currently exist.
*/
protected Texture getTexture(DrawContext dc) {
if (this.getImageSource() == null) return null;
Texture texture = dc.getTextureCache().getTexture(this.getImageSource());
if (this.width == null && texture != null) {
this.width = texture.getWidth();
this.height = texture.getHeight();
this.texCoords = texture.getImageTexCoords();
}
return texture;
}
protected void beginRendering(DrawContext dc, OGLStackHandler stackHandler) {
if (dc == null) {
String message = Logging.getMessage("nullValue.DrawContextIsNull");
Logging.logger().fine(message);
throw new IllegalArgumentException(message);
}
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
int attribMask =
GL2.GL_COLOR_BUFFER_BIT // for alpha test func and ref, blend func
| GL2.GL_CURRENT_BIT // for current color
| GL2.GL_ENABLE_BIT // for enable/disable
| GL2.GL_LINE_BIT // for line width
| GL2.GL_TRANSFORM_BIT; // for matrix mode
stackHandler.pushAttrib(gl, attribMask);
stackHandler.pushTextureIdentity(gl);
stackHandler.pushProjectionIdentity(gl);
java.awt.Rectangle viewport = dc.getView().getViewport();
gl.glOrtho(
viewport.x, viewport.x + viewport.width, viewport.y, viewport.y + viewport.height, -1, 1);
stackHandler.pushModelviewIdentity(gl);
// Enable the alpha test.
gl.glEnable(GL2.GL_ALPHA_TEST);
gl.glAlphaFunc(GL2.GL_GREATER, 0.0f);
// Enable blending in premultiplied color mode.
gl.glEnable(GL.GL_BLEND);
OGLUtil.applyBlending(gl, true);
gl.glDisable(GL.GL_CULL_FACE);
gl.glDisable(GL.GL_DEPTH_TEST);
gl.glDisable(GL2.GL_LIGHTING);
gl.glDisable(GL.GL_TEXTURE_2D);
}
protected void applyBackground(
DrawContext dc,
WWIcon icon,
Vec4 screenPoint,
double width,
double height,
double pedestalSpacing,
double pedestalScale) {
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
double backgroundScale;
backgroundScale = icon.getBackgroundScale();
if (icon.getBackgroundTexture() != null) {
if (icon.getBackgroundTexture().bind(dc)) {
TextureCoords texCoords = icon.getBackgroundTexture().getTexCoords();
gl.glPushMatrix();
gl.glLoadIdentity();
double bgwidth = backgroundScale * width;
double bgheight = backgroundScale * height;
// Offset the background for the highlighted scale.
// if (icon.isHighlighted())
// {
// gl.glTranslated(0d, height * (icon.getHighlightScale() - 1) / 2, 0d);
// }
// Offset the background for the pedestal height.
gl.glTranslated(0d, (pedestalScale * height) + pedestalSpacing, 0d);
// Place the background centered behind the icon.
gl.glTranslated(screenPoint.x - bgwidth / 2, screenPoint.y - (bgheight - height) / 2, 0d);
// Scale to the background image dimension.
gl.glScaled(bgwidth, bgheight, 1d);
dc.drawUnitQuad(texCoords);
gl.glPopMatrix();
}
}
}
protected void drawToolTipOutline(
DrawContext dc, double width, double height, ToolTipAttributes attributes) {
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
this.applyColor(dc, attributes.getOutlineColor(), attributes.getOutlineOpacity());
gl.glLineWidth((float) getOutlineWidth());
// Draw a line loop around the background rectangle. Inset the lines slightly to compensate for
// OpenGL's line
// rasterization algorithm. We want the line to straddle the rectangle pixels.
double inset = 0.5;
gl.glBegin(GL2.GL_LINE_LOOP);
gl.glVertex2d(inset, inset);
gl.glVertex2d(width - inset, inset);
gl.glVertex2d(width - inset, height - inset);
gl.glVertex2d(inset, height - inset);
gl.glEnd();
}
/**
* Creates a {@link Texture} from this instance's {@link TextureData} if the <code>TextureData
* </code> exists.
*
* @param dc the current draw context.
* @return the newly created texture, or null if this instance has no current <code>TextureData
* </code> or if texture creation failed.
*/
protected Texture makeTextureFromTextureData(DrawContext dc) {
if (dc == null) {
String message = Logging.getMessage("nullValue.DrawContextIsNull");
Logging.logger().severe(message);
throw new IllegalStateException(message);
}
if (this.getTextureData()
== null) // texture not in cache yet texture data is null, can't initialize
{
String msg = Logging.getMessage("nullValue.TextureDataIsNull");
Logging.logger().severe(msg);
throw new IllegalStateException(msg);
}
try {
Texture texture = TextureIO.newTexture(this.getTextureData());
if (texture == null) {
this.textureInitializationFailed = true;
return null;
}
this.width = texture.getWidth();
this.height = texture.getHeight();
this.texCoords = texture.getImageTexCoords();
this.setTextureParameters(dc, texture);
// Cache the texture and release the texture data.
dc.getTextureCache().put(this.getImageSource(), texture);
this.setTextureData(null);
return texture;
} catch (Exception e) {
String name =
this.isBufferedImageSource() ? "BufferedImage" : this.getImageSource().toString();
String msg = Logging.getMessage("generic.ExceptionAttemptingToCreateTexture", name);
Logging.logger().log(java.util.logging.Level.SEVERE, msg, e);
return null;
}
}
protected void drawMany(DrawContext dc, Iterable<? extends WWIcon> icons, Layer layer) {
if (dc == null) {
String msg = Logging.getMessage("nullValue.DrawContextIsNull");
Logging.logger().severe(msg);
throw new IllegalArgumentException(msg);
}
if (dc.getVisibleSector() == null) return;
SectorGeometryList geos = dc.getSurfaceGeometry();
//noinspection RedundantIfStatement
if (geos == null) return;
if (icons == null) {
String msg = Logging.getMessage("nullValue.IconIterator");
Logging.logger().severe(msg);
throw new IllegalArgumentException(msg);
}
Iterator<? extends WWIcon> iterator = icons.iterator();
if (!iterator.hasNext()) return;
double horizon = dc.getView().getHorizonDistance();
while (iterator.hasNext()) {
WWIcon icon = iterator.next();
if (!isIconValid(icon, true)) {
// Record feedback data for this WWIcon if feedback is enabled.
if (icon != null) this.recordFeedback(dc, icon, null, null);
continue;
}
if (!icon.isVisible()) {
// Record feedback data for this WWIcon if feedback is enabled.
this.recordFeedback(dc, icon, null, null);
continue;
}
// Determine Cartesian position from the surface geometry if the icon is near the surface,
// otherwise draw it from the globe.
Position pos = icon.getPosition();
Vec4 iconPoint = null;
if (pos.getElevation() < dc.getGlobe().getMaxElevation()
&& !this.isAlwaysUseAbsoluteElevation()) {
iconPoint = dc.getSurfaceGeometry().getSurfacePoint(icon.getPosition());
}
if (iconPoint == null) {
Angle lat = pos.getLatitude();
Angle lon = pos.getLongitude();
double elevation = pos.getElevation();
if (!this.isAlwaysUseAbsoluteElevation()) elevation += dc.getGlobe().getElevation(lat, lon);
iconPoint = dc.getGlobe().computePointFromPosition(lat, lon, elevation);
}
double eyeDistance =
icon.isAlwaysOnTop() ? 0 : dc.getView().getEyePoint().distanceTo3(iconPoint);
// X-PATCH Marjan
// extracted skip conditions into an overrideable method
if (!meetsRenderCriteria(dc, icon, iconPoint, eyeDistance)) {
this.recordFeedback(dc, icon, iconPoint, null);
continue;
}
// X-END
// The icons aren't drawn here, but added to the ordered queue to be drawn back-to-front.
dc.addOrderedRenderable(new OrderedIcon(icon, iconPoint, layer, eyeDistance, horizon));
if (icon.isShowToolTip()) this.addToolTip(dc, icon, iconPoint);
}
}
protected TextRenderer getTextRenderer(DrawContext dc, java.awt.Font font) {
return OGLTextRenderer.getOrCreateTextRenderer(dc.getTextRendererCache(), font);
}
protected Vec4 drawIcon(DrawContext dc, OrderedIcon uIcon) {
if (uIcon.point == null) {
String msg = Logging.getMessage("nullValue.PointIsNull");
Logging.logger().severe(msg);
// Record feedback data for this WWIcon if feedback is enabled.
if (uIcon.icon != null) this.recordFeedback(dc, uIcon.icon, null, null);
return null;
}
WWIcon icon = uIcon.icon;
if (dc.getView().getFrustumInModelCoordinates().getNear().distanceTo(uIcon.point) < 0) {
// Record feedback data for this WWIcon if feedback is enabled.
this.recordFeedback(dc, icon, uIcon.point, null);
return null;
}
final Vec4 screenPoint = dc.getView().project(uIcon.point);
if (screenPoint == null) {
// Record feedback data for this WWIcon if feedback is enabled.
this.recordFeedback(dc, icon, uIcon.point, null);
return null;
}
double pedestalScale;
double pedestalSpacing;
if (this.pedestal != null) {
pedestalScale = this.pedestal.getScale();
pedestalSpacing = pedestal.getSpacingPixels();
} else {
pedestalScale = 0d;
pedestalSpacing = 0d;
}
GL2 gl = dc.getGL().getGL2(); // GL initialization checks for GL2 compatibility.
this.setDepthFunc(dc, uIcon, screenPoint);
gl.glMatrixMode(GL2.GL_MODELVIEW);
gl.glLoadIdentity();
Dimension size = icon.getSize();
double width = size != null ? size.getWidth() : icon.getImageTexture().getWidth(dc);
double height = size != null ? size.getHeight() : icon.getImageTexture().getHeight(dc);
gl.glTranslated(
screenPoint.x - width / 2, screenPoint.y + (pedestalScale * height) + pedestalSpacing, 0d);
if (icon.isHighlighted()) {
double heightDelta = this.pedestal != null ? 0 : height / 2; // expand only above the pedestal
gl.glTranslated(width / 2, heightDelta, 0);
gl.glScaled(icon.getHighlightScale(), icon.getHighlightScale(), icon.getHighlightScale());
gl.glTranslated(-width / 2, -heightDelta, 0);
}
Rectangle rect =
new Rectangle(
(int) (screenPoint.x - width / 2),
(int) (screenPoint.y),
(int) width,
(int) (height + (pedestalScale * height) + pedestalSpacing));
if (dc.isPickingMode()) {
// If in picking mode and pick clipping is enabled, check to see if the icon is within the
// pick volume.
if (this.isPickFrustumClippingEnabled() && !dc.getPickFrustums().intersectsAny(rect)) {
// Record feedback data for this WWIcon if feedback is enabled.
this.recordFeedback(dc, icon, uIcon.point, rect);
return screenPoint;
} else {
java.awt.Color color = dc.getUniquePickColor();
int colorCode = color.getRGB();
this.pickSupport.addPickableObject(colorCode, icon, uIcon.getPosition(), false);
gl.glColor3ub((byte) color.getRed(), (byte) color.getGreen(), (byte) color.getBlue());
}
}
if (icon.getBackgroundTexture() != null)
this.applyBackground(dc, icon, screenPoint, width, height, pedestalSpacing, pedestalScale);
if (icon.getImageTexture().bind(dc)) {
TextureCoords texCoords = icon.getImageTexture().getTexCoords();
gl.glScaled(width, height, 1d);
dc.drawUnitQuad(texCoords);
}
if (this.pedestal != null && this.pedestal.getImageTexture() != null) {
gl.glLoadIdentity();
gl.glTranslated(screenPoint.x - (pedestalScale * (width / 2)), screenPoint.y, 0d);
gl.glScaled(width * pedestalScale, height * pedestalScale, 1d);
if (this.pedestal.getImageTexture().bind(dc)) {
TextureCoords texCoords = this.pedestal.getImageTexture().getTexCoords();
dc.drawUnitQuad(texCoords);
}
}
// Record feedback data for this WWIcon if feedback is enabled.
this.recordFeedback(dc, icon, uIcon.point, rect);
return screenPoint;
}
/**
* Returns true if the IconRenderer should record feedback about how the specified WWIcon has been
* processed.
*
* @param dc the current DrawContext.
* @param icon the WWIcon to record feedback information for.
* @return true to record feedback; false otherwise.
*/
protected boolean isFeedbackEnabled(DrawContext dc, WWIcon icon) {
if (dc.isPickingMode()) return false;
Boolean b = (Boolean) icon.getValue(AVKey.FEEDBACK_ENABLED);
return (b != null && b);
}