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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
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*
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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package javax.swing.plaf.nimbus;
import java.awt.image.BufferedImage;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
import java.util.Arrays;
InnerShadowEffect - This effect currently only works with ARGB type buffered
images.
Author: Created by Jasper Potts (Jun 18, 2007)
/**
* InnerShadowEffect - This effect currently only works with ARGB type buffered
* images.
*
* @author Created by Jasper Potts (Jun 18, 2007)
*/
class InnerShadowEffect extends ShadowEffect {
// =================================================================================================================
// Effect Methods
Get the type of this effect, one of UNDER,BLENDED,OVER. UNDER means the result of apply effect should be painted
under the src image. BLENDED means the result of apply sffect contains a modified src image so just it should be
painted. OVER means the result of apply effect should be painted over the src image.
Returns: The effect type
/**
* Get the type of this effect, one of UNDER,BLENDED,OVER. UNDER means the result of apply effect should be painted
* under the src image. BLENDED means the result of apply sffect contains a modified src image so just it should be
* painted. OVER means the result of apply effect should be painted over the src image.
*
* @return The effect type
*/
Effect.EffectType getEffectType() {
return Effect.EffectType.OVER;
}
Apply the effect to the src image generating the result . The result image may or may not contain the source
image depending on what the effect type is.
Params: - src – The source image for applying the effect to
- dst – The dstination image to paint effect result into. If this is null then a new image will be created
- w – The width of the src image to apply effect to, this allow the src and dst buffers to be bigger than
the area the need effect applied to it
- h – The height of the src image to apply effect to, this allow the src and dst buffers to be bigger than
the area the need effect applied to it
Returns: Image with the result of the effect
/**
* Apply the effect to the src image generating the result . The result image may or may not contain the source
* image depending on what the effect type is.
*
* @param src The source image for applying the effect to
* @param dst The dstination image to paint effect result into. If this is null then a new image will be created
* @param w The width of the src image to apply effect to, this allow the src and dst buffers to be bigger than
* the area the need effect applied to it
* @param h The height of the src image to apply effect to, this allow the src and dst buffers to be bigger than
* the area the need effect applied to it
* @return Image with the result of the effect
*/
BufferedImage applyEffect(BufferedImage src, BufferedImage dst, int w, int h) {
if (src == null || src.getType() != BufferedImage.TYPE_INT_ARGB){
throw new IllegalArgumentException("Effect only works with " +
"source images of type BufferedImage.TYPE_INT_ARGB.");
}
if (dst != null && dst.getType() != BufferedImage.TYPE_INT_ARGB){
throw new IllegalArgumentException("Effect only works with " +
"destination images of type BufferedImage.TYPE_INT_ARGB.");
}
// calculate offset
double trangleAngle = Math.toRadians(angle - 90);
int offsetX = (int) (Math.sin(trangleAngle) * distance);
int offsetY = (int) (Math.cos(trangleAngle) * distance);
// clac expanded size
int tmpOffX = offsetX + size;
int tmpOffY = offsetX + size;
int tmpW = w + offsetX + size + size;
int tmpH = h + offsetX + size;
// create tmp buffers
int[] lineBuf = getArrayCache().getTmpIntArray(w);
byte[] srcAlphaBuf = getArrayCache().getTmpByteArray1(tmpW * tmpH);
Arrays.fill(srcAlphaBuf, (byte) 0xFF);
byte[] tmpBuf1 = getArrayCache().getTmpByteArray2(tmpW * tmpH);
byte[] tmpBuf2 = getArrayCache().getTmpByteArray3(tmpW * tmpH);
// extract src image alpha channel and inverse and offset
Raster srcRaster = src.getRaster();
for (int y = 0; y < h; y++) {
int dy = (y + tmpOffY);
int offset = dy * tmpW;
srcRaster.getDataElements(0, y, w, 1, lineBuf);
for (int x = 0; x < w; x++) {
int dx = x + tmpOffX;
srcAlphaBuf[offset + dx] = (byte) ((255 - ((lineBuf[x] & 0xFF000000) >>> 24)) & 0xFF);
}
}
// blur
float[] kernel = EffectUtils.createGaussianKernel(size * 2);
EffectUtils.blur(srcAlphaBuf, tmpBuf2, tmpW, tmpH, kernel, size * 2); // horizontal pass
EffectUtils.blur(tmpBuf2, tmpBuf1, tmpH, tmpW, kernel, size * 2);// vertical pass
//rescale
float spread = Math.min(1 / (1 - (0.01f * this.spread)), 255);
for (int i = 0; i < tmpBuf1.length; i++) {
int val = (int) (((int) tmpBuf1[i] & 0xFF) * spread);
tmpBuf1[i] = (val > 255) ? (byte) 0xFF : (byte) val;
}
// create color image with shadow color and greyscale image as alpha
if (dst == null) dst = new BufferedImage(w, h,
BufferedImage.TYPE_INT_ARGB);
WritableRaster shadowRaster = dst.getRaster();
int red = color.getRed(), green = color.getGreen(), blue = color.getBlue();
for (int y = 0; y < h; y++) {
int srcY = y + tmpOffY;
int offset = srcY * tmpW;
int shadowOffset = (srcY - offsetY) * tmpW;
for (int x = 0; x < w; x++) {
int srcX = x + tmpOffX;
int origianlAlphaVal = 255 - ((int) srcAlphaBuf[offset + srcX] & 0xFF);
int shadowVal = (int) tmpBuf1[shadowOffset + (srcX - offsetX)] & 0xFF;
int alphaVal = Math.min(origianlAlphaVal, shadowVal);
lineBuf[x] = ((byte) alphaVal & 0xFF) << 24 | red << 16 | green << 8 | blue;
}
shadowRaster.setDataElements(0, y, w, 1, lineBuf);
}
return dst;
}
}