DLI Implementation and Reference Guide - Datalogics

Containers within Pages 7.5
Areas
If your composition engine describes lines as being members of an area and positions
within that area, then you may want to create a container for each area, and distort it
to match your definition of an area:
"C" Example: Container within an Area
void WritePage (DLPDFDOC *Doc, ASFixed Width, ASFixed Depth,
areadata *AreaData)
{
DLPDFPAGE *Page = dlpdfdoccreatepage (Doc, Width, Depth);
areadata *CurrentArea = AreaData;
ASFixedMatrix Matrix;
while (AreaData)
{
DLPDFCONTENT *Content = dlpdfcontentcreate (Doc);
/* Calculate rotated lower left corner */
Matrix.a = Matrix.d = fixedOne;/* Unity Matrix */
Matrix.b = Matrix.c = 0;
/* Translate the matrix to the lower left corner of the
* area to be rotated */
Matrix.h = AreaData->X;
Matrix.v = Depth - AreaData->Y - AreaData->Depth;
/* Rotate the matrix to the desired angle */
dlpdfmatrixrotate (&Matrix, AreaData->Rotation);
/* Translate the width and depth of the area to the
* desired angle */
Point.h = AreaData->Width;
Point.v = AreaData->Depth;
FixedMatrixTransform (&Point, &Matrix, &Point);
/* Translate to the upper left corner of the rotated area */
dlpdcontenttranslate (Content,
Point.h - AreaData->Width,
Point.v - AreaData->Depth);
dlpdfcontentrotate (Content, AreaData->Rotation);
WriteLines (AreaData->UserData, Content);
dlpdfcontenttopage (Content, Page);
}
AreaData = AreaData->Next;