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/**
* Copyright 2013 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*
* ---------------------
*
* Based on Brian Paul's tile rendering library, found
* at http://www.mesa3d.org/brianp/TR.html.
*
* Copyright (C) 1997-2005 Brian Paul.
* Licensed under BSD-compatible terms with permission of the author.
* See LICENSE.txt for license information.
*/
package com.jogamp.opengl.util;
import javax.media.nativewindow.util.Dimension;
import javax.media.nativewindow.util.DimensionImmutable;
import javax.media.opengl.GL;
import javax.media.opengl.GL2ES3;
import javax.media.opengl.GLException;
import com.jogamp.opengl.util.GLPixelBuffer.GLPixelAttributes;
/**
* A fairly direct port of Brian Paul's tile rendering library, found
* at
* http://www.mesa3d.org/brianp/TR.html . I've java-fied it, but
* the functionality is the same.
*
* Original code Copyright (C) 1997-2005 Brian Paul. Licensed under
* BSD-compatible terms with permission of the author. See LICENSE.txt
* for license information.
*
*
* Enhanced for {@link GL2ES3}.
*
*
* See {@link TileRendererBase} for details.
*
*
* @author ryanm, sgothel
*/
public class TileRenderer extends TileRendererBase {
/**
* The width of the final clipped image. See {@link #getParam(int)}.
*/
public static final int TR_IMAGE_CLIPPING_WIDTH = 7;
/**
* The height of the final clipped image. See {@link #getParam(int)}.
*/
public static final int TR_IMAGE_CLIPPING_HEIGHT = 8;
/**
* The width of the tiles. See {@link #getParam(int)}.
*/
public static final int TR_TILE_WIDTH = 9;
/**
* The height of the tiles. See {@link #getParam(int)}.
*/
public static final int TR_TILE_HEIGHT = 10;
/**
* The width of the border around the tiles. See {@link #getParam(int)}.
*/
public static final int TR_TILE_BORDER = 11;
/**
* The tiles x-offset. See {@link #getParam(int)}.
*/
public static final int TR_TILE_X_OFFSET = 12;
/**
* The tiles y-offset. See {@link #getParam(int)}.
*/
public static final int TR_TILE_Y_OFFSET = 13;
/**
* The number of rows of tiles. See {@link #getParam(int)}.
*/
public static final int TR_ROWS = 14;
/**
* The number of columns of tiles. See {@link #getParam(int)}.
*/
public static final int TR_COLUMNS = 15;
/**
* The current tile number. Has value -1 if {@link #eot()}. See {@link #getParam(int)}.
*/
public static final int TR_CURRENT_TILE_NUM = 16;
/**
* The current row number. See {@link #getParam(int)}.
*/
public static final int TR_CURRENT_ROW = 17;
/**
* The current column number. See {@link #getParam(int)}.
*/
public static final int TR_CURRENT_COLUMN = 18;
/**
* The order that the rows are traversed. See {@link #getParam(int)}.
*/
public static final int TR_ROW_ORDER = 19;
/**
* Indicates we are traversing rows from the top to the bottom. See {@link #getParam(int)}.
*/
public static final int TR_TOP_TO_BOTTOM = 20;
/**
* Indicates we are traversing rows from the bottom to the top (default). See {@link #getParam(int)}.
*/
public static final int TR_BOTTOM_TO_TOP = 21;
private static final int DEFAULT_TILE_WIDTH = 256;
private static final int DEFAULT_TILE_HEIGHT = 256;
private static final int DEFAULT_TILE_BORDER = 0;
private final Dimension tileSize = new Dimension(DEFAULT_TILE_WIDTH, DEFAULT_TILE_HEIGHT);
private final Dimension tileSizeNB = new Dimension(DEFAULT_TILE_WIDTH - 2 * DEFAULT_TILE_BORDER, DEFAULT_TILE_HEIGHT - 2 * DEFAULT_TILE_BORDER);
private boolean isInit = false;
private Dimension imageClippingDim = null; // not set - default
private int tileBorder = DEFAULT_TILE_BORDER;
private int rowOrder = TR_BOTTOM_TO_TOP;
private int rows;
private int columns;
private int currentTile = 0;
private int currentRow;
private int currentColumn;
private int offsetX;
private int offsetY;
@Override
protected StringBuilder tileDetails(final StringBuilder sb) {
sb.append("# "+currentTile+": ["+currentColumn+"]["+currentRow+"] / "+columns+"x"+rows+", ")
.append("rowOrder "+rowOrder+", offset/size "+offsetX+"/"+offsetY+" "+tileSize.getWidth()+"x"+tileSize.getHeight()+" brd "+tileBorder+", ");
return super.tileDetails(sb);
}
/**
* Creates a new TileRenderer object
*/
public TileRenderer() {
super();
}
/**
* {@inheritDoc}
*
* Implementation {@link #reset()} internal states.
*
*/
@Override
public final void setImageSize(final int width, final int height) {
super.setImageSize(width, height);
reset();
}
/**
* Clips the image-size this tile-renderer iterates through,
* which can be retrieved via {@link #getClippedImageSize()}.
*
* Original image-size stored in this tile-renderer is unmodified.
*
*
* Implementation {@link #reset()} internal states.
*
*
* @param width The image-clipping.width
* @param height The image-clipping.height
* @see #getClippedImageSize()
*/
public final void clipImageSize(final int width, final int height) {
if( null == imageClippingDim ) {
imageClippingDim = new Dimension(width, height);
} else {
imageClippingDim.set(width, height);
}
reset();
}
/**
* Returns the clipped image-size.
*
* If a image-size is clipped via {@link #clipImageSize(int, int)},
* method returns:
*
* min( image-clipping, image-size ), otherwise image-size
*
*
* The clipping width and height can be retrieved via {@link #TR_IMAGE_CLIPPING_WIDTH}
* {@link #TR_IMAGE_CLIPPING_HEIGHT}.
*
*/
public final DimensionImmutable getClippedImageSize() {
if( null != imageClippingDim ) {
return new Dimension(Math.min(imageClippingDim.getWidth(), imageSize.getWidth()),
Math.min(imageClippingDim.getHeight(), imageSize.getHeight()) );
} else {
return imageSize;
}
}
/**
* Sets the size of the tiles to use in rendering. The actual
* effective size of the tile depends on the border size, ie (
* width - 2*border ) * ( height - 2 * border )
*
* Implementation {@link #reset()} internal states.
*
*
* @param width
* The width of the tiles. Must not be larger than the GL
* context
* @param height
* The height of the tiles. Must not be larger than the
* GL context
* @param border
* The width of the borders on each tile. This is needed
* to avoid artifacts when rendering lines or points with
* thickness > 1.
*/
public final void setTileSize(final int width, final int height, final int border) {
if( 0 > border ) {
throw new IllegalArgumentException("Tile border must be >= 0");
}
if( 2 * border >= width || 2 * border >= height ) {
throw new IllegalArgumentException("Tile size must be > 0x0 minus 2*border");
}
tileBorder = border;
tileSize.set( width, height );
tileSizeNB.set( width - 2 * border, height - 2 * border );
reset();
}
/**
* Sets an xy offset for the resulting tiles
* {@link TileRendererBase#TR_CURRENT_TILE_X_POS x-pos} and {@link TileRendererBase#TR_CURRENT_TILE_Y_POS y-pos}.
* @see #TR_TILE_X_OFFSET
* @see #TR_TILE_Y_OFFSET
**/
public void setTileOffset(final int xoff, final int yoff) {
offsetX = xoff;
offsetY = yoff;
}
/**
* {@inheritDoc}
*
* Reset internal states of {@link TileRenderer} are:
*
* - {@link #TR_ROWS}
* - {@link #TR_COLUMNS}
* - {@link #TR_CURRENT_COLUMN}
* - {@link #TR_CURRENT_ROW}
* - {@link #TR_CURRENT_TILE_NUM}
* - {@link #TR_CURRENT_TILE_X_POS}
* - {@link #TR_CURRENT_TILE_Y_POS}
* - {@link #TR_CURRENT_TILE_WIDTH}
* - {@link #TR_CURRENT_TILE_HEIGHT}
*
*/
@Override
public final void reset() {
final DimensionImmutable clippedImageSize = getClippedImageSize();
columns = ( clippedImageSize.getWidth() + tileSizeNB.getWidth() - 1 ) / tileSizeNB.getWidth();
rows = ( clippedImageSize.getHeight() + tileSizeNB.getHeight() - 1 ) / tileSizeNB.getHeight();
currentRow = 0;
currentColumn = 0;
currentTile = 0;
currentTileXPos = 0;
currentTileYPos = 0;
currentTileWidth = 0;
currentTileHeight = 0;
assert columns >= 0;
assert rows >= 0;
beginCalled = false;
isInit = true;
}
/* pp */ final int getCurrentTile() { return currentTile; }
@Override
public final int getParam(final int pname) {
switch (pname) {
case TR_IMAGE_WIDTH:
return imageSize.getWidth();
case TR_IMAGE_HEIGHT:
return imageSize.getHeight();
case TR_CURRENT_TILE_X_POS:
return currentTileXPos;
case TR_CURRENT_TILE_Y_POS:
return currentTileYPos;
case TR_CURRENT_TILE_WIDTH:
return currentTileWidth;
case TR_CURRENT_TILE_HEIGHT:
return currentTileHeight;
case TR_IMAGE_CLIPPING_WIDTH:
return null != imageClippingDim ? imageClippingDim.getWidth() : 0;
case TR_IMAGE_CLIPPING_HEIGHT:
return null != imageClippingDim ? imageClippingDim.getHeight() : 0;
case TR_TILE_WIDTH:
return tileSize.getWidth();
case TR_TILE_HEIGHT:
return tileSize.getHeight();
case TR_TILE_BORDER:
return tileBorder;
case TR_TILE_X_OFFSET:
return offsetX;
case TR_TILE_Y_OFFSET:
return offsetY;
case TR_ROWS:
return rows;
case TR_COLUMNS:
return columns;
case TR_CURRENT_TILE_NUM:
return currentTile;
case TR_CURRENT_ROW:
return currentRow;
case TR_CURRENT_COLUMN:
return currentColumn;
case TR_ROW_ORDER:
return rowOrder;
default:
throw new IllegalArgumentException("Invalid pname: "+pname);
}
}
/**
* Sets the order of row traversal, default is {@link #TR_BOTTOM_TO_TOP}.
*
* @param order The row traversal order, must be either {@link #TR_TOP_TO_BOTTOM} or {@link #TR_BOTTOM_TO_TOP}.
*/
public final void setRowOrder(final int order) {
if (order == TR_TOP_TO_BOTTOM || order == TR_BOTTOM_TO_TOP) {
rowOrder = order;
} else {
throw new IllegalArgumentException("Must pass TR_TOP_TO_BOTTOM or TR_BOTTOM_TO_TOP");
}
}
@Override
public final boolean isSetup() {
return 0 < imageSize.getWidth() && 0 < imageSize.getHeight();
}
/**
* {@inheritDoc}
*
*
* end of tiling is reached w/ {@link TileRenderer}, if at least one of the following is true:
*
* - all tiles have been rendered, i.e. {@link #TR_CURRENT_TILE_NUM} is -1
* - no tiles to render, i.e. {@link #TR_COLUMNS} or {@link #TR_ROWS} is 0
*
*
*/
@Override
public final boolean eot() {
if ( !isInit ) { // ensure at least one reset-call
reset();
}
return 0 > currentTile || 0 >= columns*rows;
}
/**
* {@inheritDoc}
*
* @throws IllegalStateException if {@link #setImageSize(int, int) image-size} has not been set or
* {@link #eot() end-of-tiling} has been reached.
*/
@Override
public final void beginTile( final GL gl ) throws IllegalStateException, GLException {
if( !isSetup() ) {
throw new IllegalStateException("Image size has not been set: "+this);
}
if ( eot() ) {
throw new IllegalStateException("EOT reached: "+this);
}
validateGL(gl);
/* which tile (by row and column) we're about to render */
if (rowOrder == TR_BOTTOM_TO_TOP) {
currentRow = currentTile / columns;
currentColumn = currentTile % columns;
} else {
currentRow = rows - ( currentTile / columns ) - 1;
currentColumn = currentTile % columns;
}
assert ( currentRow < rows );
assert ( currentColumn < columns );
final int border = tileBorder;
final DimensionImmutable clippedImageSize = getClippedImageSize();
int tH, tW;
/* Compute actual size of this tile with border */
if (currentRow < rows - 1) {
tH = tileSize.getHeight();
} else {
tH = clippedImageSize.getHeight() - ( rows - 1 ) * ( tileSizeNB.getHeight() ) + 2 * border;
}
if (currentColumn < columns - 1) {
tW = tileSize.getWidth();
} else {
tW = clippedImageSize.getWidth() - ( columns - 1 ) * ( tileSizeNB.getWidth() ) + 2 * border;
}
currentTileXPos = currentColumn * tileSizeNB.getWidth() + offsetX;
currentTileYPos = currentRow * tileSizeNB.getHeight() + offsetY;
/* Save tile size, with border */
currentTileWidth = tW;
currentTileHeight = tH;
gl.glViewport( 0, 0, tW, tH );
if( DEBUG ) {
System.err.println("TileRenderer.begin: "+this.toString());
}
// Do not forget to issue:
// reshape( 0, 0, tW, tH );
// which shall reflect tile renderer tiles: currentTileXPos, currentTileYPos and imageSize
beginCalled = true;
}
@Override
public void endTile( final GL gl ) throws IllegalStateException, GLException {
if( !beginCalled ) {
throw new IllegalStateException("beginTile(..) has not been called");
}
validateGL(gl);
// be sure OpenGL rendering is finished
gl.glFlush();
// implicitly save current glPixelStore values
psm.setPackAlignment(gl, 1);
final GL2ES3 gl2es3;
final int readBuffer;
if( gl.isGL2ES3() ) {
gl2es3 = gl.getGL2ES3();
readBuffer = gl2es3.getDefaultReadBuffer();
gl2es3.glReadBuffer(readBuffer);
} else {
gl2es3 = null;
readBuffer = 0; // undef. probably default: GL_FRONT (single buffering) GL_BACK (double buffering)
}
if( DEBUG ) {
System.err.println("TileRenderer.end.0: readBuffer 0x"+Integer.toHexString(readBuffer)+", "+this.toString());
}
final int tmp[] = new int[1];
if( tileBuffer != null ) {
final GLPixelAttributes pixelAttribs = tileBuffer.pixelAttributes;
final int srcX = tileBorder;
final int srcY = tileBorder;
final int srcWidth = tileSizeNB.getWidth();
final int srcHeight = tileSizeNB.getHeight();
final int readPixelSize = GLBuffers.sizeof(gl, tmp, pixelAttribs.bytesPerPixel, srcWidth, srcHeight, 1, true);
tileBuffer.clear();
if( tileBuffer.requiresNewBuffer(gl, srcWidth, srcHeight, readPixelSize) ) {
throw new IndexOutOfBoundsException("Required " + readPixelSize + " bytes of buffer, only had " + tileBuffer);
}
gl.glReadPixels( srcX, srcY, srcWidth, srcHeight, pixelAttribs.format, pixelAttribs.type, tileBuffer.buffer);
// be sure OpenGL rendering is finished
gl.glFlush();
tileBuffer.position( readPixelSize );
tileBuffer.flip();
}
if( imageBuffer != null ) {
final GLPixelAttributes pixelAttribs = imageBuffer.pixelAttributes;
final int srcX = tileBorder;
final int srcY = tileBorder;
final int srcWidth = currentTileWidth - 2 * tileBorder;
final int srcHeight = currentTileHeight - 2 * tileBorder;
/* setup pixel store for glReadPixels */
final int rowLength = imageSize.getWidth();
psm.setPackRowLength(gl2es3, rowLength);
/* read the tile into the final image */
final int readPixelSize = GLBuffers.sizeof(gl, tmp, pixelAttribs.bytesPerPixel, srcWidth, srcHeight, 1, true);
final int skipPixels = currentColumn * tileSizeNB.getWidth();
final int skipRows = currentRow * tileSizeNB.getHeight();
final int ibPos = ( skipPixels + ( skipRows * rowLength ) ) * pixelAttribs.bytesPerPixel;
final int ibLim = ibPos + readPixelSize;
imageBuffer.clear();
if( imageBuffer.requiresNewBuffer(gl, srcWidth, srcHeight, readPixelSize) ) {
throw new IndexOutOfBoundsException("Required " + ibLim + " bytes of buffer, only had " + imageBuffer);
}
imageBuffer.position(ibPos);
gl.glReadPixels( srcX, srcY, srcWidth, srcHeight, pixelAttribs.format, pixelAttribs.type, imageBuffer.buffer);
// be sure OpenGL rendering is finished
gl.glFlush();
imageBuffer.position( ibLim );
imageBuffer.flip();
}
/* restore previous glPixelStore values */
psm.restore(gl);
beginCalled = false;
/* increment tile counter, return 1 if more tiles left to render */
currentTile++;
if( currentTile >= rows * columns ) {
currentTile = -1; /* all done */
}
}
}