void DjVuEngineImpl::AddUserAnnots(RenderedBitmap *bmp, int pageNo, float zoom, int rotation, RectI screen)
{
if (!bmp || userAnnots.Count() == 0)
return;
HDC hdc = CreateCompatibleDC(NULL);
HGDIOBJ prevBmp = SelectObject(hdc, bmp->GetBitmap());
{
using namespace Gdiplus;
Graphics g(hdc);
g.SetCompositingQuality(CompositingQualityHighQuality);
g.SetPageUnit(UnitPixel);
for (size_t i = 0; i < userAnnots.Count(); i++) {
PageAnnotation& annot = userAnnots.At(i);
if (annot.pageNo != pageNo)
continue;
RectD arect;
switch (annot.type) {
case Annot_Highlight:
arect = Transform(annot.rect, pageNo, zoom, rotation);
arect.Offset(-screen.x, -screen.y);
g.FillRectangle(&SolidBrush(Unblend(annot.color, 119)), arect.ToGdipRectF());
break;
case Annot_Underline:
case Annot_StrikeOut:
arect = RectD(annot.rect.x, annot.rect.BR().y, annot.rect.dx, 0);
if (Annot_StrikeOut == annot.type)
arect.y -= annot.rect.dy / 2;
arect = Transform(arect, pageNo, zoom, rotation);
arect.Offset(-screen.x, -screen.y);
g.DrawLine(&Pen(FromColor(annot.color), zoom), (float)arect.x,
(float)arect.y, (float)arect.BR().x, (float)arect.BR().y);
break;
case Annot_Squiggly:
{
Pen p(FromColor(annot.color), 0.5f * zoom);
REAL dash[2] = { 2, 2 };
p.SetDashPattern(dash, dimof(dash));
p.SetDashOffset(1);
arect = Transform(RectD(annot.rect.x, annot.rect.BR().y - 0.25f, annot.rect.dx, 0), pageNo, zoom, rotation);
arect.Offset(-screen.x, -screen.y);
g.DrawLine(&p, (float)arect.x, (float)arect.y, (float)arect.BR().x, (float)arect.BR().y);
p.SetDashOffset(3);
arect = Transform(RectD(annot.rect.x, annot.rect.BR().y + 0.25f, annot.rect.dx, 0), pageNo, zoom, rotation);
arect.Offset(-screen.x, -screen.y);
g.DrawLine(&p, (float)arect.x, (float)arect.y, (float)arect.BR().x, (float)arect.BR().y);
}
break;
}
}
}
SelectObject(hdc, prevBmp);
DeleteDC(hdc);
}
RectD DjVuEngineImpl::Transform(RectD rect, int pageNo, float zoom, int rotation, bool inverse)
{
PointD TL = Transform(rect.TL(), pageNo, zoom, rotation, inverse);
PointD BR = Transform(rect.BR(), pageNo, zoom, rotation, inverse);
return RectD::FromXY(TL, BR);
}
