/*
* Get the effective printing region in raster space
*/
static void
get_raster_print_rect( const gs_memory_t *mem,
const gs_rect * plp_print_rect,
gs_rect * prst_print_rect,
const gs_matrix * prst2lp
)
{
gs_matrix lp2rst;
pcl_invert_mtx(prst2lp, &lp2rst);
pcl_transform_rect(mem, plp_print_rect, prst_print_rect, &lp2rst);
intersect_with_positive_quadrant(prst_print_rect);
}
/*
* Preserve the current point and text margin set by transfroming them into
* logical page space.
*/
static void
preserve_cap_and_margins(const pcl_state_t * pcs,
gs_point * pcur_pt, gs_rect * ptext_rect)
{
pcur_pt->x = (double)pcs->cap.x;
pcur_pt->y = (double)pcs->cap.y;
gs_point_transform(pcur_pt->x,
pcur_pt->y, &(pcs->xfm_state.pd2lp_mtx), pcur_pt);
ptext_rect->p.x = (double)pcs->margins.left;
ptext_rect->p.y = (double)pcs->margins.top;
ptext_rect->q.x = (double)pcs->margins.right;
ptext_rect->q.y = (double)(pcs->margins.top + pcs->margins.length);
pcl_transform_rect(pcs->memory, ptext_rect, ptext_rect,
&(pcs->xfm_state.pd2lp_mtx));
}
/*
* Convert the current point and text margin set back into "pseudo print
* direction" space.
*/
static void
restore_cap_and_margins(pcl_state_t * pcs,
const gs_point * pcur_pt, const gs_rect * ptext_rect)
{
gs_matrix lp2pd;
gs_point tmp_pt;
gs_rect tmp_rect;
pcl_invert_mtx(&(pcs->xfm_state.pd2lp_mtx), &lp2pd);
gs_point_transform(pcur_pt->x, pcur_pt->y, &lp2pd, &tmp_pt);
pcs->cap.x = (coord) tmp_pt.x;
pcs->cap.y = (coord) tmp_pt.y;
pcl_transform_rect(pcs->memory, ptext_rect, &tmp_rect, &lp2pd);
pcs->margins.left = (coord) tmp_rect.p.x;
pcs->margins.top = (coord) tmp_rect.p.y;
pcs->margins.right = (coord) tmp_rect.q.x;
pcs->margins.length = (coord) tmp_rect.q.y - pcs->margins.top;
}
/*
* Update the transformations stored in the PCL state. This will also update
* the device clipping region information in device and logical page space.
* The text region margins are preserved.
*
* This routine should be called for:
*
* changes in the paper size
* transition from page front to page back for duplexing
* (this facility is not currently implemented)
* change of left or top offset registration
* change of logical page orientation
* change of print direction
*
* The paper size, left/top offsets, logical page orientation, and print
* direction should be set before this procedure is called.
*/
static void
update_xfm_state(
pcl_state_t * pcs,
bool reset_initial
)
{
pcl_xfm_state_t * pxfmst = &(pcs->xfm_state);
const pcl_paper_size_t * psize = pxfmst->paper_size;
coord offset;
gs_matrix pg2dev, pg2lp;
gs_rect print_rect, dev_rect, text_rect;
gs_point cur_pt;
floatp loff = pxfmst->left_offset_cp;
floatp toff = pxfmst->top_offset_cp;
/* preserve the current point and text rectangle in logical page space */
if ( !reset_initial )
preserve_cap_and_margins(pcs, &cur_pt, &text_rect);
/* get the page to device transformation */
gs_defaultmatrix(pcs->pgs, &pg2dev);
/*
* Get the logical to page space transformation, and the dimensions of the
* logical page.
*
* NOT YET IMPLEMENT - if on back of a duplex page, change size of offsets
*
* if (duplex_back(pcs)) {
* loff = -loff;
* toff = -toff;
* }
*/
pcl_make_rotation( pxfmst->lp_orient,
(floatp)(psize->width),
(floatp)(psize->height),
&(pxfmst->lp2pg_mtx)
);
pxfmst->lp2pg_mtx.tx += loff;
pxfmst->lp2pg_mtx.ty += toff;
if ( pcs->personality == rtl )
offset = 0;
else
offset = ( (pxfmst->lp_orient & 0x1) != 0 ? psize->offset_landscape
: psize->offset_portrait );
/* we need an extra 1/10 inch on each side to support 80
characters vs. 78 at 10 cpi. Only apply to A4. */
if ( ( pcs->wide_a4 ) &&
(psize->width == 59520) &&
(psize->height == 84168) )
offset -= inch2coord(1.0/10.0);
gs_matrix_translate( &(pxfmst->lp2pg_mtx),
(floatp)offset,
0.0,
&(pxfmst->lp2pg_mtx)
);
if ((pxfmst->lp_orient & 0x1) != 0) {
pxfmst->lp_size.x = psize->height - 2 * offset;
pxfmst->lp_size.y = psize->width;
} else {
pxfmst->lp_size.x = psize->width - 2 * offset;
pxfmst->lp_size.y = psize->height;
}
/* then the logical page to device transformation */
gs_matrix_multiply(&(pxfmst->lp2pg_mtx), &pg2dev, &(pxfmst->lp2dev_mtx));
pg2dev.ty = round(pg2dev.ty); pg2dev.tx = round(pg2dev.tx);
pxfmst->lp2dev_mtx.tx = round(pxfmst->lp2dev_mtx.tx);
pxfmst->lp2dev_mtx.ty = round(pxfmst->lp2dev_mtx.ty);
/* the "pseudo page direction to logical page/device transformations */
pcl_make_rotation( pxfmst->print_dir,
(floatp)pxfmst->lp_size.x,
(floatp)pxfmst->lp_size.y,
&(pxfmst->pd2lp_mtx)
);
gs_matrix_multiply( &(pxfmst->pd2lp_mtx),
&(pxfmst->lp2dev_mtx),
&(pxfmst->pd2dev_mtx)
);
/* calculate the print direction page size */
if ((pxfmst->print_dir) & 0x1) {
pxfmst->pd_size.x = pxfmst->lp_size.y;
pxfmst->pd_size.y = pxfmst->lp_size.x;
} else
pxfmst->pd_size = pxfmst->lp_size;
{
gx_device *pdev = gs_currentdevice(pcs->pgs);
/* We must not set up a clipping region beyond the hardware margins of
the device, but the pcl language definition requires hardware
margins to be 1/6". We set all margins to the the maximum of the
PCL language defined 1/6" and the actual hardware margin. If 1/6"
is not available pcl will not work correctly all of the time. */
if ( pcs->personality == rtl ) {
print_rect.p.x = inch2coord(pdev->HWMargins[0] / 72.0);
print_rect.p.y = inch2coord(pdev->HWMargins[1]) / 72.0;
print_rect.q.x = psize->width - inch2coord(pdev->HWMargins[2] / 72.0);
print_rect.q.y = psize->height - inch2coord(pdev->HWMargins[3] / 72.0);
} else {
print_rect.p.x = max(PRINTABLE_MARGIN_CP, inch2coord(pdev->HWMargins[0] / 72.0));
print_rect.p.y = max(PRINTABLE_MARGIN_CP, inch2coord(pdev->HWMargins[1]) / 72.0);
print_rect.q.x = psize->width - max(PRINTABLE_MARGIN_CP, inch2coord(pdev->HWMargins[2] / 72.0));
print_rect.q.y = psize->height - max(PRINTABLE_MARGIN_CP, inch2coord(pdev->HWMargins[3] / 72.0));
}
pcl_transform_rect(pcs->memory, &print_rect, &dev_rect, &pg2dev);
pxfmst->dev_print_rect.p.x = float2fixed(round(dev_rect.p.x));
pxfmst->dev_print_rect.p.y = float2fixed(round(dev_rect.p.y));
pxfmst->dev_print_rect.q.x = float2fixed(round(dev_rect.q.x));
pxfmst->dev_print_rect.q.y = float2fixed(round(dev_rect.q.y));
}
pcl_invert_mtx(&(pxfmst->lp2pg_mtx), &pg2lp);
pcl_transform_rect(pcs->memory, &print_rect, &(pxfmst->lp_print_rect), &pg2lp);
/* restablish the current point and text region */
if ( !reset_initial )
restore_cap_and_margins(pcs, &cur_pt, &text_rect);
/*
* No need to worry about pat_orient or pat_ref_pt; these will always
* be recalculated just prior to use.
*/
}