Examples with PDExtendedGraphicsState com.tom_roush.pdfbox.pdmodel.graphics.state.PDExtendedGraphicsState used on opensource projects

Example 11 with PDExtendedGraphicsState

use of com.tom_roush.pdfbox.pdmodel.graphics.state.PDExtendedGraphicsState in project PdfBox-Android by TomRoush.

the class PDTextAppearanceHandler method drawRightArrow.

private void drawRightArrow(PDAnnotationText annotation, final PDAppearanceContentStream contentStream) throws IOException {
    PDRectangle bbox = adjustRectAndBBox(annotation, 20, 20);
    float min = Math.min(bbox.getWidth(), bbox.getHeight());
    contentStream.setMiterLimit(4);
    contentStream.setLineJoinStyle(1);
    contentStream.setLineCapStyle(0);
    // value from Adobe
    contentStream.setLineWidth(0.59f);
    // Adobe first fills a white circle with CA ca 0.6, so do we
    contentStream.saveGraphicsState();
    contentStream.setLineWidth(1);
    PDExtendedGraphicsState gs = new PDExtendedGraphicsState();
    gs.setAlphaSourceFlag(false);
    gs.setStrokingAlphaConstant(0.6f);
    gs.setNonStrokingAlphaConstant(0.6f);
    gs.setBlendMode(BlendMode.NORMAL);
    contentStream.setGraphicsStateParameters(gs);
    contentStream.setNonStrokingColor(1f);
    drawCircle2(contentStream, min / 2, min / 2, min / 2 - 1);
    contentStream.fill();
    contentStream.restoreGraphicsState();
    contentStream.saveGraphicsState();
    // rescale so that the glyph fits into circle and move it to circle center
    // values gathered by trial and error
    contentStream.transform(Matrix.getScaleInstance(0.001f * min / 1.3f, 0.001f * min / 1.3f));
    contentStream.transform(Matrix.getTranslateInstance(200, 300));
    // we get the shape of a Zapf Dingbats right arrow (0x2794) and use that one.
    // Adobe uses a different font (which one?), or created the shape from scratch.
    Path path = PDType1Font.ZAPF_DINGBATS.getPath("a160");
    addPath(contentStream, path);
    contentStream.restoreGraphicsState();
    // surprisingly, this one not counterclockwise.
    drawCircle(contentStream, min / 2, min / 2, min / 2 - 1);
    contentStream.fillAndStroke();
}