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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.
*/
package com.jogamp.opengl.util;
import javax.media.opengl.GL;
import javax.media.opengl.GL2ES3;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLException;
import com.jogamp.opengl.util.GLPixelBuffer.GLPixelAttributes;
/**
* Variation of {@link TileRenderer} w/o using fixed tiles but arbitrary rectangular regions.
* <p>
* See {@link TileRendererBase} for details.
* </p>
*/
public class RandomTileRenderer extends TileRendererBase {
private boolean tileRectSet = false;
/**
* Creates a new TileRenderer object
*/
public RandomTileRenderer() {
super();
}
@Override
public final int getParam(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;
default:
throw new IllegalArgumentException("Invalid pname: "+pname);
}
}
/**
* Set the tile rectangle for the subsequent rendering calls.
*
* @throws IllegalArgumentException is tile x/y are < 0 or tile size is <= 0x0
*/
public void setTileRect(int tX, int tY, int tWidth, int tHeight) throws IllegalStateException, IllegalArgumentException {
if( 0 > tX || 0 > tY ) {
throw new IllegalArgumentException("Tile pos must be >= 0/0");
}
if( 0 >= tWidth || 0 >= tHeight ) {
throw new IllegalArgumentException("Tile size must be > 0x0");
}
this.currentTileXPos = tX;
this.currentTileYPos = tY;
this.currentTileWidth = tWidth;
this.currentTileHeight = tHeight;
tileRectSet = true;
}
@Override
public final boolean isSetup() {
return 0 < imageSize.getWidth() && 0 < imageSize.getHeight() && tileRectSet;
}
/**
* {@inheritDoc}
*
* <p>
* <i>end of tiling</i> is never reached w/ {@link RandomRileRenderer},
* i.e. method always returns false.
* </p>
*/
@Override
public final boolean eot() { return false; }
/**
* {@inheritDoc}
*
* Reset internal states of {@link RandomTileRenderer} are: <i>none</i>.
*/
@Override
public final void reset() { }
/**
* {@inheritDoc}
*
* @throws IllegalStateException if {@link #setImageSize(int, int) image-size} has not been set or
* {@link #setTileRect(int, int, int, int) tile-rect} has not been set.
*/
@Override
public final void beginTile(GL gl) throws IllegalStateException, GLException {
if( 0 >= imageSize.getWidth() || 0 >= imageSize.getHeight() ) {
throw new IllegalStateException("Image size has not been set");
}
if( !tileRectSet ) {
throw new IllegalStateException("tileRect has not been set");
}
validateGL(gl);
gl.glViewport( 0, 0, currentTileWidth, currentTileHeight );
if( DEBUG ) {
System.err.println("TileRenderer.begin.X: "+this.toString());
}
// Do not forget to issue:
// reshape( 0, 0, tW, tH );
// which shall reflect tile renderer fileds: currentTileXPos, currentTileYPos and imageSize
beginCalled = true;
}
@Override
public void endTile( 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 = 0;
final int srcY = 0;
final int srcWidth = currentTileWidth;
final int srcHeight = currentTileHeight;
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 = 0;
final int srcY = 0;
final int srcWidth = currentTileWidth;
final int srcHeight = currentTileHeight;
/* 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 ibPos = ( currentTileXPos + ( currentTileYPos * rowLength ) ) * pixelAttribs.bytesPerPixel; // skipPixels + skipRows
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;
}
/**
* Rendering one tile, by simply calling {@link GLAutoDrawable#display()}.
*
* @throws IllegalStateException if no {@link GLAutoDrawable} is {@link #attachAutoDrawable(GLAutoDrawable) attached}
* or imageSize is not set
*/
public void display(int tX, int tY, int tWidth, int tHeight) throws IllegalStateException {
setTileRect(tX, tY, tWidth, tHeight);
display();
}
}
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