protected void initializeTexture(DrawContext dc) {
Texture iconTexture = dc.getTextureCache().getTexture(this.getIconFilePath());
if (iconTexture != null) return;
try {
InputStream iconStream = this.getClass().getResourceAsStream("/" + this.getIconFilePath());
if (iconStream == null) {
File iconFile = new File(this.iconFilePath);
if (iconFile.exists()) {
iconStream = new FileInputStream(iconFile);
}
}
iconTexture = TextureIO.newTexture(iconStream, false, null);
iconTexture.bind();
this.iconWidth = iconTexture.getWidth();
this.iconHeight = iconTexture.getHeight();
dc.getTextureCache().put(this.getIconFilePath(), iconTexture);
} catch (IOException e) {
String msg = Logging.getMessage("layers.IOExceptionDuringInitialization");
Logging.logger().severe(msg);
throw new WWRuntimeException(msg, e);
}
GL gl = dc.getGL();
gl.glTexParameteri(
GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MIN_FILTER, GL.GL_LINEAR); // _MIPMAP_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);
// Enable texture anisotropy, improves "tilted" world map quality.
int[] maxAnisotropy = new int[1];
gl.glGetIntegerv(GL.GL_MAX_TEXTURE_MAX_ANISOTROPY_EXT, maxAnisotropy, 0);
gl.glTexParameteri(GL.GL_TEXTURE_2D, GL.GL_TEXTURE_MAX_ANISOTROPY_EXT, maxAnisotropy[0]);
}
private void loadAllTopLevelTextures(DrawContext dc) {
for (MercatorTextureTile tile : this.topLevels) {
if (!tile.isTextureInMemory(dc.getTextureCache())) this.forceTextureLoad(tile);
}
this.levelZeroLoaded = true;
}
private void addTile(DrawContext dc, MercatorTextureTile tile) {
tile.setFallbackTile(null);
if (tile.isTextureInMemory(dc.getTextureCache())) {
// System.out.printf("Sector %s, min = %f, max = %f\n", tile.getSector(),
// dc.getGlobe().getMinElevation(tile.getSector()),
// dc.getGlobe().getMaxElevation(tile.getSector()));
this.addTileToCurrent(tile);
return;
}
// Level 0 loads may be forced
if (tile.getLevelNumber() == 0
&& this.forceLevelZeroLoads
&& !tile.isTextureInMemory(dc.getTextureCache())) {
this.forceTextureLoad(tile);
if (tile.isTextureInMemory(dc.getTextureCache())) {
this.addTileToCurrent(tile);
return;
}
}
// Tile's texture isn't available, so request it
if (tile.getLevelNumber() < this.levels.getNumLevels()) {
// Request only tiles with data associated at this level
if (!this.levels.isResourceAbsent(tile)) this.requestTexture(dc, tile);
}
// Set up to use the currentResource tile's texture
if (this.currentResourceTile != null) {
if (this.currentResourceTile.getLevelNumber() == 0
&& this.forceLevelZeroLoads
&& !this.currentResourceTile.isTextureInMemory(dc.getTextureCache())
&& !this.currentResourceTile.isTextureInMemory(dc.getTextureCache()))
this.forceTextureLoad(this.currentResourceTile);
if (this.currentResourceTile.isTextureInMemory(dc.getTextureCache())) {
tile.setFallbackTile(currentResourceTile);
this.addTileToCurrent(tile);
}
}
}
private void addTileOrDescendants(DrawContext dc, MercatorTextureTile tile) {
if (this.meetsRenderCriteria(dc, tile)) {
this.addTile(dc, tile);
return;
}
// The incoming tile does not meet the rendering criteria, so it must be subdivided and those
// subdivisions tested against the criteria.
// All tiles that meet the selection criteria are drawn, but some of those tiles will not have
// textures associated with them either because their texture isn't loaded yet or because they
// are finer grain than the layer has textures for. In these cases the tiles use the texture of
// the closest ancestor that has a texture loaded. This ancestor is called the
// currentResourceTile.
// A texture transform is applied during rendering to align the sector's texture coordinates
// with the
// appropriate region of the ancestor's texture.
MercatorTextureTile ancestorResource = null;
try {
// TODO: Revise this to reflect that the parent layer is only requested while the algorithm
// continues
// to search for the layer matching the criteria.
// At this point the tile does not meet the render criteria but it may have its texture in
// memory.
// If so, register this tile as the resource tile. If not, then this tile will be the next
// level
// below a tile with texture in memory. So to provide progressive resolution increase, add
// this tile
// to the draw list. That will cause the tile to be drawn using its parent tile's texture, and
// it will
// cause it's texture to be requested. At some future call to this method the tile's texture
// will be in
// memory, it will not meet the render criteria, but will serve as the parent to a tile that
// goes
// through this same process as this method recurses. The result of all this is that a tile
// isn't rendered
// with its own texture unless all its parents have their textures loaded. In addition to
// causing
// progressive resolution increase, this ensures that the parents are available as the user
// zooms out, and
// therefore the layer remains visible until the user is zoomed out to the point the layer is
// no longer
// active.
if (tile.isTextureInMemory(dc.getTextureCache()) || tile.getLevelNumber() == 0) {
ancestorResource = this.currentResourceTile;
this.currentResourceTile = tile;
} else if (!tile.getLevel().isEmpty()) {
// this.addTile(dc, tile);
// return;
// Issue a request for the parent before descending to the children.
if (tile.getLevelNumber() < this.levels.getNumLevels()) {
// Request only tiles with data associated at this level
if (!this.levels.isResourceAbsent(tile)) this.requestTexture(dc, tile);
}
}
MercatorTextureTile[] subTiles =
tile.createSubTiles(this.levels.getLevel(tile.getLevelNumber() + 1));
for (MercatorTextureTile child : subTiles) {
if (this.isTileVisible(dc, child)) this.addTileOrDescendants(dc, child);
}
} finally {
if (ancestorResource != null) // Pop this tile as the currentResource ancestor
this.currentResourceTile = ancestorResource;
}
}
protected void drawIcon(DrawContext dc) {
if (this.getIconFilePath() == null) return;
GL gl = dc.getGL();
OGLStackHandler ogsh = new OGLStackHandler();
try {
// Initialize texture if necessary
Texture iconTexture = dc.getTextureCache().getTexture(this.getIconFilePath());
if (iconTexture == null) {
this.initializeTexture(dc);
iconTexture = dc.getTextureCache().getTexture(this.getIconFilePath());
if (iconTexture == null) {
String msg = Logging.getMessage("generic.ImageReadFailed");
Logging.logger().finer(msg);
return;
}
}
gl.glDisable(GL.GL_DEPTH_TEST);
double width = this.getScaledIconWidth();
double height = this.getScaledIconHeight();
// Load a parallel projection with xy dimensions (viewportWidth, viewportHeight)
// into the GL projection matrix.
java.awt.Rectangle viewport = dc.getView().getViewport();
ogsh.pushProjectionIdentity(gl);
double maxwh = width > height ? width : height;
gl.glOrtho(0d, viewport.width, 0d, viewport.height, -0.6 * maxwh, 0.6 * maxwh);
// Translate and scale
ogsh.pushModelviewIdentity(gl);
double scale = this.computeScale(viewport);
Vec4 locationSW = this.computeLocation(viewport, scale);
gl.glTranslated(locationSW.x(), locationSW.y(), locationSW.z());
// Scale to 0..1 space
gl.glScaled(scale, scale, 1);
gl.glScaled(width, height, 1d);
if (!dc.isPickingMode()) {
gl.glEnable(GL.GL_BLEND);
gl.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA);
// Draw background color behind the map
gl.glColor4ub(
(byte) this.backColor.getRed(),
(byte) this.backColor.getGreen(),
(byte) this.backColor.getBlue(),
(byte) (this.backColor.getAlpha() * this.getOpacity()));
dc.drawUnitQuad();
// Draw world map icon
gl.glColor4d(1d, 1d, 1d, this.getOpacity());
gl.glEnable(GL.GL_TEXTURE_2D);
iconTexture.bind();
TextureCoords texCoords = iconTexture.getImageTexCoords();
dc.drawUnitQuad(texCoords);
gl.glBindTexture(GL.GL_TEXTURE_2D, 0);
gl.glDisable(GL.GL_TEXTURE_2D);
// Draw crosshair for current location
gl.glLoadIdentity();
gl.glTranslated(locationSW.x(), locationSW.y(), locationSW.z());
// Scale to width x height space
gl.glScaled(scale, scale, 1);
// Set color
float[] colorRGB = this.color.getRGBColorComponents(null);
gl.glColor4d(colorRGB[0], colorRGB[1], colorRGB[2], this.getOpacity());
// Draw crosshair
Position groundPos = this.computeGroundPosition(dc, dc.getView());
if (groundPos != null) {
int x = (int) (width * (groundPos.getLongitude().degrees + 180) / 360);
int y = (int) (height * (groundPos.getLatitude().degrees + 90) / 180);
int w = 10; // cross branch length
// Draw
gl.glBegin(GL.GL_LINE_STRIP);
gl.glVertex3d(x - w, y, 0);
gl.glVertex3d(x + w + 1, y, 0);
gl.glEnd();
gl.glBegin(GL.GL_LINE_STRIP);
gl.glVertex3d(x, y - w, 0);
gl.glVertex3d(x, y + w + 1, 0);
gl.glEnd();
}
// Draw view footprint in map icon space
if (this.showFootprint) {
this.footPrintPositions = this.computeViewFootPrint(dc, 32);
if (this.footPrintPositions != null) {
gl.glBegin(GL.GL_LINE_STRIP);
LatLon p1 = this.footPrintPositions.get(0);
for (LatLon p2 : this.footPrintPositions) {
int x = (int) (width * (p2.getLongitude().degrees + 180) / 360);
int y = (int) (height * (p2.getLatitude().degrees + 90) / 180);
// Draw
if (LatLon.locationsCrossDateline(p1, p2)) {
int y1 = (int) (height * (p1.getLatitude().degrees + 90) / 180);
gl.glVertex3d(x < width / 2 ? width : 0, (y1 + y) / 2, 0);
gl.glEnd();
gl.glBegin(GL.GL_LINE_STRIP);
gl.glVertex3d(x < width / 2 ? 0 : width, (y1 + y) / 2, 0);
}
gl.glVertex3d(x, y, 0);
p1 = p2;
}
gl.glEnd();
}
}
// Draw 1px border around and inside the map
gl.glBegin(GL.GL_LINE_STRIP);
gl.glVertex3d(0, 0, 0);
gl.glVertex3d(width, 0, 0);
gl.glVertex3d(width, height - 1, 0);
gl.glVertex3d(0, height - 1, 0);
gl.glVertex3d(0, 0, 0);
gl.glEnd();
} else {
// Picking
this.pickSupport.clearPickList();
this.pickSupport.beginPicking(dc);
// Where in the world are we picking ?
Position pickPosition =
computePickPosition(
dc, locationSW, new Dimension((int) (width * scale), (int) (height * scale)));
Color color = dc.getUniquePickColor();
int colorCode = color.getRGB();
this.pickSupport.addPickableObject(colorCode, this, pickPosition, false);
gl.glColor3ub((byte) color.getRed(), (byte) color.getGreen(), (byte) color.getBlue());
dc.drawUnitQuad();
this.pickSupport.endPicking(dc);
this.pickSupport.resolvePick(dc, dc.getPickPoint(), this);
}
} finally {
dc.restoreDefaultDepthTesting();
dc.restoreDefaultCurrentColor();
if (dc.isPickingMode()) dc.restoreDefaultBlending();
ogsh.pop(gl);
}
}
