/*
* Copyright (c) 2009-2012 jMonkeyEngine
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 THE COPYRIGHT OWNER 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.
*/
package com.jme3.texture.image;
import com.jme3.math.ColorRGBA;
import com.jme3.math.FastMath;
import com.jme3.texture.Image;
import java.nio.ByteBuffer;
public class DefaultImageRaster extends ImageRaster {
private final int[] components = new int[4];
private ByteBuffer buffer;
private final Image image;
private final ImageCodec codec;
private final int width;
private final int height;
private final int offset;
private final byte[] temp;
private final boolean convertToLinear;
private int slice;
private void rangeCheck(int x, int y) {
if (x < 0 || y < 0 || x >= width || y >= height) {
throw new IllegalArgumentException("x and y must be inside the image dimensions:"
+ x + ", " + y + " in:" + width + ", " + height);
}
}
public DefaultImageRaster(Image image, int slice, int mipMapLevel, boolean convertToLinear) {
int[] mipMapSizes = image.getMipMapSizes();
int availableMips = mipMapSizes != null ? mipMapSizes.length : 1;
if (mipMapLevel >= availableMips) {
throw new IllegalStateException("Cannot create image raster for mipmap level #" + mipMapLevel + ". "
+ "Image only has " + availableMips + " mipmap levels.");
}
if (image.hasMipmaps()) {
this.width = Math.max(1, image.getWidth() >> mipMapLevel);
this.height = Math.max(1, image.getHeight() >> mipMapLevel);
int mipOffset = 0;
for (int i = 0; i < mipMapLevel; i++) {
mipOffset += mipMapSizes[i];
}
this.offset = mipOffset;
} else {
this.width = image.getWidth();
this.height = image.getHeight();
this.offset = 0;
}
this.image = image;
this.slice = slice;
// Conversion to linear only needed if image's color space is sRGB.
this.convertToLinear = convertToLinear && image.getColorSpace() == ColorSpace.sRGB;
this.buffer = image.getData(slice);
this.codec = ImageCodec.lookup(image.getFormat());
if (codec instanceof ByteAlignedImageCodec || codec instanceof ByteOffsetImageCodec) {
this.temp = new byte[codec.bpp];
} else {
this.temp = null;
}
}
public void setSlice(int slice) {
this.slice = slice;
this.buffer = image.getData(slice);
}
@Override
public int getWidth() {
return width;
}
@Override
public int getHeight() {
return height;
}
@Override
public void setPixel(int x, int y, ColorRGBA color) {
rangeCheck(x, y);
if (convertToLinear) {
// Input is linear, needs to be converted to sRGB before writing
// into image.
color = color.getAsSrgb();
}
// Check flags for grayscale
if (codec.isGray) {
float gray = color.r * 0.27f + color.g * 0.67f + color.b * 0.06f;
color = new ColorRGBA(gray, gray, gray, color.a);
}
switch (codec.type) {
case ImageCodec.FLAG_F16:
components[0] = (int) FastMath.convertFloatToHalf(color.a);
components[1] = (int) FastMath.convertFloatToHalf(color.r);
components[2] = (int) FastMath.convertFloatToHalf(color.g);
components[3] = (int) FastMath.convertFloatToHalf(color.b);
break;
case ImageCodec.FLAG_F32:
components[0] = (int) Float.floatToIntBits(color.a);
components[1] = (int) Float.floatToIntBits(color.r);
components[2] = (int) Float.floatToIntBits(color.g);
components[3] = (int) Float.floatToIntBits(color.b);
break;
case 0:
// Convert color to bits by multiplying by size
components[0] = Math.min( (int) (color.a * codec.maxAlpha + 0.5f), codec.maxAlpha);
components[1] = Math.min( (int) (color.r * codec.maxRed + 0.5f), codec.maxRed);
components[2] = Math.min( (int) (color.g * codec.maxGreen + 0.5f), codec.maxGreen);
components[3] = Math.min( (int) (color.b * codec.maxBlue + 0.5f), codec.maxBlue);
break;
}
codec.writeComponents(getBuffer(), x, y, width, offset, components, temp);
image.setUpdateNeeded();
}
private ByteBuffer getBuffer(){
if(buffer == null){
this.buffer = image.getData(slice);
}
return buffer;
}
@Override
public ColorRGBA getPixel(int x, int y, ColorRGBA store) {
rangeCheck(x, y);
codec.readComponents(getBuffer(), x, y, width, offset, components, temp);
if (store == null) {
store = new ColorRGBA();
}
switch (codec.type) {
case ImageCodec.FLAG_F16:
store.set(FastMath.convertHalfToFloat((short)components[1]),
FastMath.convertHalfToFloat((short)components[2]),
FastMath.convertHalfToFloat((short)components[3]),
FastMath.convertHalfToFloat((short)components[0]));
break;
case ImageCodec.FLAG_F32:
store.set(Float.intBitsToFloat((int)components[1]),
Float.intBitsToFloat((int)components[2]),
Float.intBitsToFloat((int)components[3]),
Float.intBitsToFloat((int)components[0]));
break;
case 0:
// Convert to float and divide by bitsize to get into range 0.0 - 1.0.
store.set((float)components[1] / codec.maxRed,
(float)components[2] / codec.maxGreen,
(float)components[3] / codec.maxBlue,
(float)components[0] / codec.maxAlpha);
break;
}
if (codec.isGray) {
store.g = store.b = store.r;
} else {
if (codec.maxRed == 0) {
store.r = 1;
}
if (codec.maxGreen == 0) {
store.g = 1;
}
if (codec.maxBlue == 0) {
store.b = 1;
}
if (codec.maxAlpha == 0) {
store.a = 1;
}
}
if (convertToLinear) {
// Input image is sRGB, need to convert to linear.
store.setAsSrgb(store.r, store.g, store.b, store.a);
}
return store;
}
}