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Diffstat (limited to 'src/jogl/classes/com/jogamp/opengl/util/RandomTileRenderer.java')
| -rw-r--r-- | src/jogl/classes/com/jogamp/opengl/util/RandomTileRenderer.java | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/src/jogl/classes/com/jogamp/opengl/util/RandomTileRenderer.java b/src/jogl/classes/com/jogamp/opengl/util/RandomTileRenderer.java new file mode 100644 index 000000000..1c87dad4e --- /dev/null +++ b/src/jogl/classes/com/jogamp/opengl/util/RandomTileRenderer.java @@ -0,0 +1,237 @@ +/** + * 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(); + + // save current glPixelStore values + psm.save(gl); + 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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