public void testCreateIndexed() {
byte[] redLUT = new byte[] {1, 10};
byte[] greenLUT = new byte[] {2, 20};
byte[] blueLUT = new byte[] {3, 30};
byte[] alphaLUT = new byte[] {4, 40};
ImageTypeSpecifier type =
ImageTypeSpecifier.createIndexed(
redLUT, greenLUT, blueLUT, alphaLUT, 1, DataBuffer.TYPE_BYTE);
ColorModel model = type.getColorModel();
assertEquals(
"Failed to return the colorspace", ColorSpace.TYPE_RGB, model.getColorSpace().getType());
assertEquals(
"Failed to return the transparency", Transparency.TRANSLUCENT, model.getTransparency());
assertEquals(
"Failed to return the tranfer type", DataBuffer.TYPE_BYTE, model.getTransferType());
assertEquals("Failed to return the red color component", 1, model.getRed(0));
assertEquals("Failed to return the red color component", 10, model.getRed(1));
assertEquals("Failed to return the green color component", 2, model.getGreen(0));
assertEquals("Failed to return the green color component", 20, model.getGreen(1));
assertEquals("Failed to return the blue color component", 3, model.getBlue(0));
assertEquals("Failed to return the blue color component", 30, model.getBlue(1));
assertEquals("Failed to return the alpha color component", 4, model.getAlpha(0));
assertEquals("Failed to return the alpha color component", 40, model.getAlpha(1));
}
/**
* Gets a specific pixel color from the specified buffered image
*
* @param image
* @param i
* @param j
* @param color
* @return
*/
protected Color getPixelColor(BufferedImage image, int i, int j) {
ColorModel cm = image.getColorModel();
Raster raster = image.getRaster();
Object pixel = raster.getDataElements(i, j, null);
Color actual;
if (cm.hasAlpha()) {
actual =
new Color(cm.getRed(pixel), cm.getGreen(pixel), cm.getBlue(pixel), cm.getAlpha(pixel));
} else {
actual = new Color(cm.getRed(pixel), cm.getGreen(pixel), cm.getBlue(pixel), 255);
}
return actual;
}
public static void main(String args[]) {
ColorModel cm =
new ColorModel(32) {
public int getAlpha(int pixel) {
return 255;
}
public int getBlue(int pixel) {
return 255;
}
public int getGreen(int pixel) {
return 255;
}
public int getRed(int pixel) {
return 255;
}
};
cm.hasAlpha();
cm.isAlphaPremultiplied();
cm.getTransferType();
cm.getPixelSize();
cm.getComponentSize();
cm.getComponentSize();
cm.getTransparency();
cm.getNumComponents();
cm.getNumColorComponents();
cm.getRed(20);
cm.getGreen(20);
cm.getBlue(20);
cm.getAlpha(20);
cm.getRGB(20);
cm.isAlphaPremultiplied();
cm.isAlphaPremultiplied();
cm = ColorModel.getRGBdefault();
}
public BufferedImage changeGrey() {
PixelGrabber pg =
new PixelGrabber(this.image.getSource(), 0, 0, this.iw, this.ih, this.pixels, 0, this.iw);
try {
pg.grabPixels();
} catch (InterruptedException e) {
e.printStackTrace();
}
int grey = 123;
ColorModel cm = ColorModel.getRGBdefault();
for (int i = 0; i < this.iw * this.ih; i++) {
int alpha = cm.getAlpha(this.pixels[i]);
int red;
if (cm.getRed(this.pixels[i]) > grey) red = 255;
else red = 0;
int green;
if (cm.getGreen(this.pixels[i]) > grey) green = 255;
else green = 0;
int blue;
if (cm.getBlue(this.pixels[i]) > grey) blue = 255;
else {
blue = 0;
}
this.pixels[i] = (alpha << 24 | red << 16 | green << 8 | blue);
}
Image tempImg =
Toolkit.getDefaultToolkit()
.createImage(new MemoryImageSource(this.iw, this.ih, this.pixels, 0, this.iw));
this.image = new BufferedImage(tempImg.getWidth(null), tempImg.getHeight(null), 4);
this.image.createGraphics().drawImage(tempImg, 0, 0, null);
return this.image;
}
public BufferedImage getMedian() {
PixelGrabber pg =
new PixelGrabber(this.image.getSource(), 0, 0, this.iw, this.ih, this.pixels, 0, this.iw);
try {
pg.grabPixels();
} catch (InterruptedException e) {
e.printStackTrace();
}
ColorModel cm = ColorModel.getRGBdefault();
for (int i = 1; i < this.ih - 1; i++) {
for (int j = 1; j < this.iw - 1; j++) {
int alpha = cm.getAlpha(this.pixels[(i * this.iw + j)]);
int red4 = cm.getRed(this.pixels[(i * this.iw + j - 1)]);
int red5 = cm.getRed(this.pixels[(i * this.iw + j)]);
int red6 = cm.getRed(this.pixels[(i * this.iw + j + 1)]);
int red;
if (red4 >= red5) {
if (red5 >= red6) {
red = red5;
} else {
if (red4 >= red6) red = red6;
else red = red4;
}
} else {
if (red4 > red6) {
red = red4;
} else {
if (red5 > red6) red = red6;
else {
red = red5;
}
}
}
int green4 = cm.getGreen(this.pixels[(i * this.iw + j - 1)]);
int green5 = cm.getGreen(this.pixels[(i * this.iw + j)]);
int green6 = cm.getGreen(this.pixels[(i * this.iw + j + 1)]);
int green;
if (green4 >= green5) {
if (green5 >= green6) {
green = green5;
} else {
if (green4 >= green6) green = green6;
else green = green4;
}
} else {
if (green4 > green6) {
green = green4;
} else {
if (green5 > green6) green = green6;
else {
green = green5;
}
}
}
int blue4 = cm.getBlue(this.pixels[(i * this.iw + j - 1)]);
int blue5 = cm.getBlue(this.pixels[(i * this.iw + j)]);
int blue6 = cm.getBlue(this.pixels[(i * this.iw + j + 1)]);
int blue;
if (blue4 >= blue5) {
if (blue5 >= blue6) {
blue = blue5;
} else {
if (blue4 >= blue6) blue = blue6;
else blue = blue4;
}
} else {
if (blue4 > blue6) {
blue = blue4;
} else {
if (blue5 > blue6) blue = blue6;
else {
blue = blue5;
}
}
}
this.pixels[(i * this.iw + j)] = (alpha << 24 | red << 16 | green << 8 | blue);
}
}
Image tempImg =
Toolkit.getDefaultToolkit()
.createImage(new MemoryImageSource(this.iw, this.ih, this.pixels, 0, this.iw));
this.image = new BufferedImage(tempImg.getWidth(null), tempImg.getHeight(null), 4);
this.image.createGraphics().drawImage(tempImg, 0, 0, null);
return this.image;
}
// fast rendering algorithm
// basically applies duplicates the picture and applies a size*size kernel
// in only one pass.
// the kernel is simulated by an horizontal and a vertical pass
// implemented by Sebastien Petrucci
private BufferedImage createShadowFast(final BufferedImage src) {
int shadowSize = this.size;
int srcWidth = src.getWidth();
int srcHeight = src.getHeight();
int dstWidth = srcWidth + size;
int dstHeight = srcHeight + size;
int left = (shadowSize - 1) >> 1;
int right = shadowSize - left;
int yStop = dstHeight - right;
BufferedImage dst = new BufferedImage(dstWidth, dstHeight, BufferedImage.TYPE_INT_ARGB);
int shadowRgb = color.getRGB() & 0x00FFFFFF;
int[] aHistory = new int[shadowSize];
int historyIdx;
int aSum;
ColorModel srcColorModel = src.getColorModel();
WritableRaster srcRaster = src.getRaster();
int[] dstBuffer = ((DataBufferInt) dst.getRaster().getDataBuffer()).getData();
int lastPixelOffset = right * dstWidth;
float hSumDivider = 1.0f / size;
float vSumDivider = opacity / size;
// horizontal pass : extract the alpha mask from the source picture and
// blur it into the destination picture
for (int srcY = 0, dstOffset = left * dstWidth; srcY < srcHeight; srcY++) {
// first pixels are empty
for (historyIdx = 0; historyIdx < shadowSize; ) {
aHistory[historyIdx++] = 0;
}
aSum = 0;
historyIdx = 0;
// compute the blur average with pixels from the source image
for (int srcX = 0; srcX < srcWidth; srcX++) {
int a = (int) (aSum * hSumDivider); // calculate alpha value
dstBuffer[dstOffset++] = a << 24; // store the alpha value only
// the shadow color will be added in the next pass
aSum -= aHistory[historyIdx]; // substract the oldest pixel from the sum
// extract the new pixel ...
a = srcColorModel.getAlpha(srcRaster.getDataElements(srcX, srcY, null));
aHistory[historyIdx] = a; // ... and store its value into history
aSum += a; // ... and add its value to the sum
if (++historyIdx >= shadowSize) {
historyIdx -= shadowSize;
}
}
// blur the end of the row - no new pixels to grab
for (int i = 0; i < shadowSize; i++) {
int a = (int) (aSum * hSumDivider);
dstBuffer[dstOffset++] = a << 24;
// substract the oldest pixel from the sum ... and nothing new to add !
aSum -= aHistory[historyIdx];
if (++historyIdx >= shadowSize) {
historyIdx -= shadowSize;
}
}
}
// vertical pass
for (int x = 0, bufferOffset = 0; x < dstWidth; x++, bufferOffset = x) {
aSum = 0;
// first pixels are empty
for (historyIdx = 0; historyIdx < left; ) {
aHistory[historyIdx++] = 0;
}
// and then they come from the dstBuffer
for (int y = 0; y < right; y++, bufferOffset += dstWidth) {
int a = dstBuffer[bufferOffset] >>> 24; // extract alpha
aHistory[historyIdx++] = a; // store into history
aSum += a; // and add to sum
}
bufferOffset = x;
historyIdx = 0;
// compute the blur average with pixels from the previous pass
for (int y = 0; y < yStop; y++, bufferOffset += dstWidth) {
int a = (int) (aSum * vSumDivider); // calculate alpha value
dstBuffer[bufferOffset] = a << 24 | shadowRgb; // store alpha value + shadow color
aSum -= aHistory[historyIdx]; // substract the oldest pixel from the sum
a = dstBuffer[bufferOffset + lastPixelOffset] >>> 24; // extract the new pixel ...
aHistory[historyIdx] = a; // ... and store its value into history
aSum += a; // ... and add its value to the sum
if (++historyIdx >= shadowSize) {
historyIdx -= shadowSize;
}
}
// blur the end of the column - no pixels to grab anymore
for (int y = yStop; y < dstHeight; y++, bufferOffset += dstWidth) {
int a = (int) (aSum * vSumDivider);
dstBuffer[bufferOffset] = a << 24 | shadowRgb;
aSum -= aHistory[historyIdx]; // substract the oldest pixel from the sum
if (++historyIdx >= shadowSize) {
historyIdx -= shadowSize;
}
}
}
return dst;
}
