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/* Copyright (C) 1996, 1997, 1998 Aladdin Enterprises. All rights
reserved. Unauthorized use, copying, and/or distribution
prohibited. */
/* pcdraw.c - PCL5 drawing utilities */
#include "gx.h"
#include "gsmatrix.h"
#include "gscoord.h"
#include "gsstate.h"
#include "gsrop.h"
#include "gxfixed.h"
#include "pcstate.h"
#include "pcht.h"
#include "pccrd.h"
#include "pcpatrn.h"
#include "pcdraw.h"
/*
* Set all necessary graphics state parameters for PCL drawing
* (currently only CTM and clipping region).
*/
int
pcl_set_graphics_state(
pcl_state_t * pcs
)
{
int code = pcl_set_ctm(pcs, true);
return ( code < 0 ? code
: gx_clip_to_rectangle( pcs->pgs,
&(pcs->xfm_state.dev_print_rect)
) );
}
/*
* Backwards compatibility function. Now, however, it provides accurate
* results.
*/
int
pcl_set_ctm(
pcl_state_t * pcs,
bool use_pd
)
{
gs_setmatrix( pcs->pgs,
( use_pd ? &(pcs->xfm_state.pd2dev_mtx)
: &(pcs->xfm_state.lp2dev_mtx) )
);
return 0;
}
/*
* set pcl's drawing color. Uses pcl state values to determine
* rotation and translation of patterns.
*
* The final operand indicates if a PCL raster (image) is being rendered;
* special considerations apply in this case. See the comments in pcbipatrn.c
* pcpatrn.c for further information.
*
* PCL no longer uses the graphic library transparency mechanism.
*/
int
pcl_set_drawing_color(
pcl_state_t * pcs,
pcl_pattern_source_t type,
int id,
bool for_image
)
{ int code;
/* use PCL's pattern transparency */
pcs->pattern_transparent = pcs->pcl_pattern_transparent;
if (type == pcl_pattern_raster_cspace)
code = (pcl_pattern_get_proc_PCL(type))(pcs, 0, true);
else
code = (pcl_pattern_get_proc_PCL(type))(pcs, id, (int)for_image);
if (code >= 0) {
gs_setrasterop(pcs->pgs, (gs_rop3_t)pcs->logical_op);
gs_setfilladjust(pcs->pgs, 0.0, 0.0);
}
return 0;
}
/*
* The pcl state structure retains information concerning the current contents
* of the grpahic state. To keep this information synchronized with the
* graphic state itself, this information is kept in a stack that is pushed
* or poped, repsectively, for each invocation of gsave and grestore.
* This opertion is prefromed by the following pair of routines, which should
* be used in place of gsave and grestore.
*/
private_st_gstate_ids_t();
int
pcl_gsave(
pcl_state_t * pcs
)
{
int code = 0;
pcl_gstate_ids_t * pids = gs_alloc_struct( pcs->memory,
pcl_gstate_ids_t,
&st_gstate_ids_t,
"PCL gsave"
);
if (pids == 0)
return e_Memory;
if ((code = gs_gsave(pcs->pgs)) >= 0) {
pids->prev = pcs->pids->prev;
pcs->pids->prev = pids;
pcl_ccolor_init_from(pids->pccolor, pcs->pids->pccolor);
pcl_ht_init_from(pids->pht, pcs->pids->pht);
pcl_crd_init_from(pids->pcrd, pcs->pids->pcrd);
} else
gs_free_object(pcs->memory, pids, "PCL gsave");
return code;
}
int
pcl_grestore(
pcl_state_t * pcs
)
{
pcl_gstate_ids_t * pids = pcs->pids->prev;
int code = 0;
/* check for bottom of graphic state stack */
if (pids == 0)
return e_Range;
if ((code = gs_grestore(pcs->pgs)) >= 0) {
pcs->pids->prev = pids->prev;
pcl_ccolor_copy_from(pcs->pids->pccolor, pids->pccolor);
pcl_ccolor_release(pids->pccolor);
pcl_ht_copy_from(pcs->pids->pht, pids->pht);
pcl_ht_release(pids->pht);
pcl_crd_copy_from(pcs->pids->pcrd, pids->pcrd);
pcl_crd_release(pids->pcrd);
gs_free_object(pcs->memory, pids, "PCL grestore");
}
return code;
}
void
pcl_init_gstate_stk(
pcl_state_t * pcs
)
{
pcl_gstate_ids_t * pids = gs_alloc_struct( pcs->memory,
pcl_gstate_ids_t,
&st_gstate_ids_t,
"PCL gsave"
);
if (pids != 0) { /* otherwise will crash soon enough */
pids->prev = 0;
pids->pccolor = 0;
pids->pht = 0;
pids->pcrd = 0;
}
pcs->pids = pids;
}
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