use of com.tom_roush.pdfbox.pdmodel.graphics.pattern.PDTilingPattern in project PdfBox-Android by TomRoush.
the class PDSquigglyAppearanceHandler method generateNormalAppearance.
@Override
public void generateNormalAppearance() {
PDAnnotationTextMarkup annotation = (PDAnnotationTextMarkup) getAnnotation();
PDRectangle rect = annotation.getRectangle();
float[] pathsArray = annotation.getQuadPoints();
if (pathsArray == null) {
return;
}
AnnotationBorder ab = AnnotationBorder.getAnnotationBorder(annotation, annotation.getBorderStyle());
PDColor color = annotation.getColor();
if (color == null || color.getComponents().length == 0) {
return;
}
if (Float.compare(ab.width, 0) == 0) {
// value found in adobe reader
ab.width = 1.5f;
}
// Adjust rectangle even if not empty, see PLPDF.com-MarkupAnnotations.pdf
// TODO in a class structure this should be overridable
// this is similar to polyline but different data type
// all coordinates (unlike painting) are used because I'm lazy
float minX = Float.MAX_VALUE;
float minY = Float.MAX_VALUE;
float maxX = Float.MIN_VALUE;
float maxY = Float.MIN_VALUE;
for (int i = 0; i < pathsArray.length / 2; ++i) {
float x = pathsArray[i * 2];
float y = pathsArray[i * 2 + 1];
minX = Math.min(minX, x);
minY = Math.min(minY, y);
maxX = Math.max(maxX, x);
maxY = Math.max(maxY, y);
}
rect.setLowerLeftX(Math.min(minX - ab.width / 2, rect.getLowerLeftX()));
rect.setLowerLeftY(Math.min(minY - ab.width / 2, rect.getLowerLeftY()));
rect.setUpperRightX(Math.max(maxX + ab.width / 2, rect.getUpperRightX()));
rect.setUpperRightY(Math.max(maxY + ab.width / 2, rect.getUpperRightY()));
annotation.setRectangle(rect);
PDAppearanceContentStream cs = null;
try {
cs = getNormalAppearanceAsContentStream();
setOpacity(cs, annotation.getConstantOpacity());
cs.setStrokingColor(color);
// https://stackoverflow.com/questions/9855814/pdf-spec-vs-acrobat-creation-quadpoints
for (int i = 0; i < pathsArray.length / 8; ++i) {
// Adobe uses a fixed pattern that assumes a height of 40, and it transforms to that height
// horizontally and the same / 1.8 vertically.
// translation apparently based on bottom left, but slightly different in Adobe
// TODO what if the annotation is not horizontal?
float height = pathsArray[i * 8 + 1] - pathsArray[i * 8 + 5];
cs.transform(new Matrix(height / 40f, 0, 0, height / 40f / 1.8f, pathsArray[i * 8 + 4], pathsArray[i * 8 + 5]));
// Create form, BBox is mostly fixed, except for the horizontal size which is
// horizontal size divided by the horizontal transform factor from above
// (almost)
PDFormXObject form = new PDFormXObject(createCOSStream());
form.setBBox(new PDRectangle(-0.5f, -0.5f, (pathsArray[i * 8 + 2] - pathsArray[i * 8]) / height * 40f + 0.5f, 13));
form.setResources(new PDResources());
form.setMatrix(AffineTransform.getTranslateInstance(0.5f, 0.5f));
cs.drawForm(form);
PDFormContentStream formCS = null;
try {
formCS = new PDFormContentStream(form);
PDTilingPattern pattern = new PDTilingPattern();
pattern.setBBox(new PDRectangle(0, 0, 10, 12));
pattern.setXStep(10);
pattern.setYStep(13);
pattern.setTilingType(PDTilingPattern.TILING_CONSTANT_SPACING_FASTER_TILING);
pattern.setPaintType(PDTilingPattern.PAINT_UNCOLORED);
PDPatternContentStream patternCS = null;
try {
patternCS = new PDPatternContentStream(pattern);
// from Adobe
patternCS.setLineCapStyle(1);
patternCS.setLineJoinStyle(1);
patternCS.setLineWidth(1);
patternCS.setMiterLimit(10);
patternCS.moveTo(0, 1);
patternCS.lineTo(5, 11);
patternCS.lineTo(10, 1);
patternCS.stroke();
} finally {
IOUtils.closeQuietly(patternCS);
}
COSName patternName = form.getResources().add(pattern);
// PDColorSpace patternColorSpace = new PDPattern(null, PDDeviceRGB.INSTANCE);
// PDColor patternColor = new PDColor(color.getComponents(), patternName, patternColorSpace);
// formCS.setNonStrokingColor(patternColor); TODO: PdfBox-Android
// With Adobe, the horizontal size is slightly different, don't know why
formCS.addRect(0, 0, (pathsArray[i * 8 + 2] - pathsArray[i * 8]) / height * 40f, 12);
formCS.fill();
} finally {
IOUtils.closeQuietly(formCS);
}
}
} catch (IOException ex) {
Log.e("PdfBox-Android", ex.getMessage(), ex);
} finally {
IOUtils.closeQuietly(cs);
}
}
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