private int getScaledDPI(DjatokaDecodeParam params) {
if (params.getLevel() >= 0) {
int levels = DEFAULT_LEVELS;
int reduce = levels - params.getLevel();
params.setLevelReductionFactor((reduce >= 0) ? reduce : 0);
} else if (params.getLevel() == -1
&& params.getRegion() == null
&& params.getScalingDimensions() != null) {
int width = params.getScalingDimensions()[0];
int height = params.getScalingDimensions()[1];
int levels = DEFAULT_LEVELS;
int scale_level =
Math.min(
MAX_DPI, (MAX_PX * DEFAULT_DENSITY / Math.max(Math.abs(width), Math.abs(height))));
int reduce = levels - scale_level;
params.setLevelReductionFactor((reduce >= 0) ? reduce : 0);
}
if (params.getLevelReductionFactor() > 0) {
int reduce =
1 << params.getLevelReductionFactor(); // => image.size() / 2^r: reduce 0 means image/1,
// reduce 1 means image/2, etc.
double s = 1.0 / reduce;
return (int) (MAX_DPI * s);
}
return MAX_DPI;
}
private Rectangle getCropParam(DjatokaDecodeParam params) {
if (params.getRegion() != null) {
StringTokenizer st = new StringTokenizer(params.getRegion(), "{},");
String token;
logger.debug("Region params: " + params.getRegion());
int x, y, w, h;
// top
if ((token = st.nextToken()).contains(".")) {
y = Integer.parseInt(token);
} else {
y = Integer.parseInt(token);
}
// left
if ((token = st.nextToken()).contains(".")) {
x = Integer.parseInt(token);
} else {
x = Integer.parseInt(token);
}
// height
if ((token = st.nextToken()).contains(".")) {
h = Integer.parseInt(token);
} else {
h = Integer.parseInt(token);
}
// width
if ((token = st.nextToken()).contains(".")) {
w = Integer.parseInt(token);
} else {
w = Integer.parseInt(token);
}
return new Rectangle(x, y, w, h);
}
return null;
}
public BufferedImage extractUsingCompositor() throws IOException, DjatokaException {
boolean useRegion = false;
int left = 0;
int top = 0;
int width = 50;
int height = 50;
boolean useleftDouble = false;
Double leftDouble = 0.0;
boolean usetopDouble = false;
Double topDouble = 0.0;
boolean usewidthDouble = false;
Double widthDouble = 0.0;
boolean useheightDouble = false;
Double heightDouble = 0.0;
if (params.getRegion() != null) {
StringTokenizer st = new StringTokenizer(params.getRegion(), "{},");
String token;
// top
if ((token = st.nextToken()).contains(".")) {
topDouble = Double.parseDouble(token);
usetopDouble = true;
} else top = Integer.parseInt(token);
// left
if ((token = st.nextToken()).contains(".")) {
leftDouble = Double.parseDouble(token);
useleftDouble = true;
} else left = Integer.parseInt(token);
// height
if ((token = st.nextToken()).contains(".")) {
heightDouble = Double.parseDouble(token);
useheightDouble = true;
} else height = Integer.parseInt(token);
// width
if ((token = st.nextToken()).contains(".")) {
widthDouble = Double.parseDouble(token);
usewidthDouble = true;
} else width = Integer.parseInt(token);
useRegion = true;
}
if (is != null) {
File f = File.createTempFile("tmp", ".jp2");
f.deleteOnExit();
FileOutputStream fos = new FileOutputStream(f);
sourceFile = f.getAbsolutePath();
IOUtils.copyStream(is, fos);
}
Kdu_simple_file_source raw_src = null; // Must be disposed last
Jp2_family_src family_src = new Jp2_family_src(); // Dispose last
Jpx_source wrapped_src = new Jpx_source(); // Dispose in the middle
Kdu_region_compositor compositor = null; // Must be disposed first
BufferedImage image = null;
try {
family_src.Open(sourceFile);
int success = wrapped_src.Open(family_src, true);
if (success < 0) {
family_src.Close();
wrapped_src.Close();
raw_src = new Kdu_simple_file_source(sourceFile);
}
compositor = new Kdu_region_compositor();
if (raw_src != null) compositor.Create(raw_src);
else compositor.Create(wrapped_src);
Kdu_dims imageDimensions = new Kdu_dims();
compositor.Get_total_composition_dims(imageDimensions);
Kdu_coords imageSize = imageDimensions.Access_size();
Kdu_coords imagePosition = imageDimensions.Access_pos();
if (useleftDouble)
left = imagePosition.Get_x() + (int) Math.round(leftDouble * imageSize.Get_x());
if (usetopDouble)
top = imagePosition.Get_y() + (int) Math.round(topDouble * imageSize.Get_y());
if (useheightDouble) height = (int) Math.round(heightDouble * imageSize.Get_y());
if (usewidthDouble) width = (int) Math.round(widthDouble * imageSize.Get_x());
if (useRegion) {
imageSize.Set_x(width);
imageSize.Set_y(height);
imagePosition.Set_x(left);
imagePosition.Set_y(top);
}
int reduce = 1 << params.getLevelReductionFactor();
imageSize.Set_x(imageSize.Get_x());
imageSize.Set_y(imageSize.Get_y());
imagePosition.Set_x(imagePosition.Get_x() / reduce - (1 / reduce - 1) / 2);
imagePosition.Set_y(imagePosition.Get_y() / reduce - (1 / reduce - 1) / 2);
Kdu_dims viewDims = new Kdu_dims();
viewDims.Assign(imageDimensions);
viewDims.Access_size().Set_x(imageSize.Get_x());
viewDims.Access_size().Set_y(imageSize.Get_y());
compositor.Add_compositing_layer(0, viewDims, viewDims);
if (params.getRotationDegree() == 90) compositor.Set_scale(true, false, true, 1.0F);
else if (params.getRotationDegree() == 180) compositor.Set_scale(false, true, true, 1.0F);
else if (params.getRotationDegree() == 270) compositor.Set_scale(true, true, false, 1.0F);
else compositor.Set_scale(false, false, false, 1.0F);
compositor.Get_total_composition_dims(viewDims);
Kdu_coords viewSize = viewDims.Access_size();
compositor.Set_buffer_surface(viewDims);
int[] imgBuffer = new int[viewSize.Get_x() * viewSize.Get_y()];
Kdu_compositor_buf compositorBuffer = compositor.Get_composition_buffer(viewDims);
int regionBufferSize = 0;
int[] kduBuffer = null;
Kdu_dims newRegion = new Kdu_dims();
while (compositor.Process(100000, newRegion)) {
Kdu_coords newOffset = newRegion.Access_pos();
Kdu_coords newSize = newRegion.Access_size();
newOffset.Subtract(viewDims.Access_pos());
int newPixels = newSize.Get_x() * newSize.Get_y();
if (newPixels == 0) continue;
if (newPixels > regionBufferSize) {
regionBufferSize = newPixels;
kduBuffer = new int[regionBufferSize];
}
compositorBuffer.Get_region(newRegion, kduBuffer);
int imgBuffereIdx = newOffset.Get_x() + newOffset.Get_y() * viewSize.Get_x();
int kduBufferIdx = 0;
int xDiff = viewSize.Get_x() - newSize.Get_x();
for (int j = 0; j < newSize.Get_y(); j++, imgBuffereIdx += xDiff) {
for (int i = 0; i < newSize.Get_x(); i++) {
imgBuffer[imgBuffereIdx++] = kduBuffer[kduBufferIdx++];
}
}
}
if (params.getRotationDegree() == 90 || params.getRotationDegree() == 270)
image = new BufferedImage(imageSize.Get_y(), imageSize.Get_x(), BufferedImage.TYPE_INT_RGB);
else
image = new BufferedImage(imageSize.Get_x(), imageSize.Get_y(), BufferedImage.TYPE_INT_RGB);
image.setRGB(0, 0, viewSize.Get_x(), viewSize.Get_y(), imgBuffer, 0, viewSize.Get_x());
if (compositor != null) compositor.Native_destroy();
wrapped_src.Native_destroy();
family_src.Native_destroy();
if (raw_src != null) raw_src.Native_destroy();
return image;
} catch (KduException e) {
e.printStackTrace();
throw new DjatokaException(e);
} catch (Exception e) {
e.printStackTrace();
throw new DjatokaException(e);
}
}
public BufferedImage extract() throws DjatokaException {
boolean useRegion = false;
int left = 0;
int top = 0;
int width = 50;
int height = 50;
boolean useleftDouble = false;
Double leftDouble = 0.0;
boolean usetopDouble = false;
Double topDouble = 0.0;
boolean usewidthDouble = false;
Double widthDouble = 0.0;
boolean useheightDouble = false;
Double heightDouble = 0.0;
if (params.getRegion() != null) {
StringTokenizer st = new StringTokenizer(params.getRegion(), "{},");
String token;
// top
if ((token = st.nextToken()).contains(".")) {
topDouble = Double.parseDouble(token);
usetopDouble = true;
} else top = Integer.parseInt(token);
// left
if ((token = st.nextToken()).contains(".")) {
leftDouble = Double.parseDouble(token);
useleftDouble = true;
} else left = Integer.parseInt(token);
// height
if ((token = st.nextToken()).contains(".")) {
heightDouble = Double.parseDouble(token);
useheightDouble = true;
} else height = Integer.parseInt(token);
// width
if ((token = st.nextToken()).contains(".")) {
widthDouble = Double.parseDouble(token);
usewidthDouble = true;
} else width = Integer.parseInt(token);
useRegion = true;
}
try {
if (is != null) {
File f = File.createTempFile("tmp", ".jp2");
f.deleteOnExit();
FileOutputStream fos = new FileOutputStream(f);
sourceFile = f.getAbsolutePath();
IOUtils.copyStream(is, fos);
is.close();
fos.close();
}
} catch (IOException e) {
throw new DjatokaException(e);
}
try {
Jp2_source inputSource = new Jp2_source();
Kdu_compressed_source input = null;
Jp2_family_src jp2_family_in = new Jp2_family_src();
Jp2_locator loc = new Jp2_locator();
jp2_family_in.Open(sourceFile, true);
inputSource.Open(jp2_family_in, loc);
inputSource.Read_header();
input = inputSource;
Kdu_codestream codestream = new Kdu_codestream();
codestream.Create(input);
Kdu_channel_mapping channels = new Kdu_channel_mapping();
if (inputSource.Exists()) channels.Configure(inputSource, false);
else channels.Configure(codestream);
int ref_component = channels.Get_source_component(0);
Kdu_coords ref_expansion = getReferenceExpansion(ref_component, channels, codestream);
Kdu_dims image_dims = new Kdu_dims();
codestream.Get_dims(ref_component, image_dims);
Kdu_coords imageSize = image_dims.Access_size();
Kdu_coords imagePosition = image_dims.Access_pos();
if (useleftDouble)
left = imagePosition.Get_x() + (int) Math.round(leftDouble * imageSize.Get_x());
if (usetopDouble)
top = imagePosition.Get_y() + (int) Math.round(topDouble * imageSize.Get_y());
if (useheightDouble) height = (int) Math.round(heightDouble * imageSize.Get_y());
if (usewidthDouble) width = (int) Math.round(widthDouble * imageSize.Get_x());
if (useRegion) {
imageSize.Set_x(width);
imageSize.Set_y(height);
imagePosition.Set_x(left);
imagePosition.Set_y(top);
}
int reduce = 1 << params.getLevelReductionFactor();
imageSize.Set_x(imageSize.Get_x() * ref_expansion.Get_x());
imageSize.Set_y(imageSize.Get_y() * ref_expansion.Get_y());
imagePosition.Set_x(
imagePosition.Get_x() * ref_expansion.Get_x() / reduce
- ((ref_expansion.Get_x() / reduce - 1) / 2));
imagePosition.Set_y(
imagePosition.Get_y() * ref_expansion.Get_y() / reduce
- ((ref_expansion.Get_y() / reduce - 1) / 2));
Kdu_dims view_dims = new Kdu_dims();
view_dims.Assign(image_dims);
view_dims.Access_size().Set_x(imageSize.Get_x());
view_dims.Access_size().Set_y(imageSize.Get_y());
int region_buf_size = imageSize.Get_x() * imageSize.Get_y();
int[] region_buf = new int[region_buf_size];
Kdu_region_decompressor decompressor = new Kdu_region_decompressor();
decompressor.Start(
codestream,
channels,
-1,
params.getLevelReductionFactor(),
16384,
image_dims,
ref_expansion,
new Kdu_coords(1, 1),
false,
Kdu_global.KDU_WANT_OUTPUT_COMPONENTS);
Kdu_dims new_region = new Kdu_dims();
Kdu_dims incomplete_region = new Kdu_dims();
Kdu_coords viewSize = view_dims.Access_size();
incomplete_region.Assign(image_dims);
int[] imgBuffer = new int[viewSize.Get_x() * viewSize.Get_y()];
int[] kduBuffer = null;
while (decompressor.Process(
region_buf,
image_dims.Access_pos(),
0,
0,
region_buf_size,
incomplete_region,
new_region)) {
Kdu_coords newOffset = new_region.Access_pos();
Kdu_coords newSize = new_region.Access_size();
newOffset.Subtract(view_dims.Access_pos());
kduBuffer = region_buf;
int imgBuffereIdx = newOffset.Get_x() + newOffset.Get_y() * viewSize.Get_x();
int kduBufferIdx = 0;
int xDiff = viewSize.Get_x() - newSize.Get_x();
for (int j = 0; j < newSize.Get_y(); j++, imgBuffereIdx += xDiff) {
for (int i = 0; i < newSize.Get_x(); i++) {
imgBuffer[imgBuffereIdx++] = kduBuffer[kduBufferIdx++];
}
}
}
BufferedImage image =
new BufferedImage(imageSize.Get_x(), imageSize.Get_y(), BufferedImage.TYPE_INT_RGB);
image.setRGB(0, 0, viewSize.Get_x(), viewSize.Get_y(), imgBuffer, 0, viewSize.Get_x());
if (params.getRotationDegree() > 0) {
image = ImageProcessingUtils.rotate(image, params.getRotationDegree());
}
decompressor.Native_destroy();
channels.Native_destroy();
if (codestream.Exists()) codestream.Destroy();
inputSource.Native_destroy();
input.Native_destroy();
jp2_family_in.Native_destroy();
return image;
} catch (KduException e) {
e.printStackTrace();
throw new DjatokaException(e);
} catch (Exception e) {
e.printStackTrace();
throw new DjatokaException(e);
}
}