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|
/*---------------------------------------------------------------------------*
| PDFlib - A library for generating PDF on the fly |
+---------------------------------------------------------------------------+
| Copyright (c) 1997-2006 Thomas Merz and PDFlib GmbH. All rights reserved. |
+---------------------------------------------------------------------------+
| |
| This software is subject to the PDFlib license. It is NOT in the |
| public domain. Extended versions and commercial licenses are |
| available, please check http://www.pdflib.com. |
| |
*---------------------------------------------------------------------------*/
/* $Id: p_pattern.c,v 1.2 2009/10/20 18:14:16 scuri Exp $
*
* PDFlib pattern routines
*
*/
#include "p_intern.h"
#include "p_color.h"
#include "p_image.h"
void
pdf_init_pattern(PDF *p)
{
static const char fn[] = "pdf_init_pattern";
int i;
p->pattern_number = 0;
p->pattern_capacity = PATTERN_CHUNKSIZE;
p->pattern = (pdf_pattern *) pdc_malloc(p->pdc,
sizeof(pdf_pattern) * p->pattern_capacity, fn);
for (i = 0; i < p->pattern_capacity; i++) {
p->pattern[i].used_on_current_page = pdc_false;
p->pattern[i].obj_id = PDC_BAD_ID;
}
}
void
pdf_grow_pattern(PDF *p)
{
static const char fn[] = "pdf_grow_pattern";
int i;
p->pattern = (pdf_pattern *) pdc_realloc(p->pdc, p->pattern,
sizeof(pdf_pattern) * 2 * p->pattern_capacity, fn);
for (i = p->pattern_capacity; i < 2 * p->pattern_capacity; i++) {
p->pattern[i].used_on_current_page = pdc_false;
p->pattern[i].obj_id = PDC_BAD_ID;
}
p->pattern_capacity *= 2;
}
void
pdf_write_page_pattern(PDF *p)
{
int i, total = 0;
for (i = 0; i < p->pattern_number; i++)
if (p->pattern[i].used_on_current_page)
total++;
if (total > 0)
{
pdc_puts(p->out, "/Pattern");
pdc_begin_dict(p->out);
}
if (total > 0)
{
for (i = 0; i < p->pattern_number; i++)
{
if (p->pattern[i].used_on_current_page)
{
p->pattern[i].used_on_current_page = pdc_false; /* reset */
pdc_printf(p->out, "/P%d", i);
pdc_objref(p->out, "", p->pattern[i].obj_id);
}
}
pdc_end_dict(p->out);
}
}
void
pdf_get_page_patterns(PDF *p, pdf_reslist *rl)
{
int i;
for (i = 0; i < p->pattern_number; i++) {
if (p->pattern[i].used_on_current_page) {
p->pattern[i].used_on_current_page = pdc_false; /* reset */
pdf_add_reslist(p, rl, i);
}
}
}
void
pdf_mark_page_pattern(PDF *p, int n)
{
p->pattern[n].used_on_current_page = pdc_true;
}
void
pdf_cleanup_pattern(PDF *p)
{
if (p->pattern) {
pdc_free(p->pdc, p->pattern);
p->pattern = NULL;
}
}
/* Start a new pattern definition. */
int
pdf__begin_pattern(
PDF *p,
pdc_scalar width,
pdc_scalar height,
pdc_scalar xstep,
pdc_scalar ystep,
int painttype)
{
int slot = -1;
pdc_check_number_limits(p->pdc, "width", width,
PDC_FLOAT_PREC, PDC_FLOAT_MAX);
pdc_check_number_limits(p->pdc, "height", height,
PDC_FLOAT_PREC, PDC_FLOAT_MAX);
pdc_check_number_zero(p->pdc, "xstep", xstep);
pdc_check_number_zero(p->pdc, "ystep", ystep);
if (painttype != 1 && painttype != 2)
pdc_error(p->pdc, PDC_E_ILLARG_INT,
"painttype", pdc_errprintf(p->pdc, "%d", painttype), 0, 0);
if (p->pattern_number == p->pattern_capacity)
pdf_grow_pattern(p);
pdf_pg_suspend(p);
PDF_SET_STATE(p, pdf_state_pattern);
p->pattern[p->pattern_number].obj_id = pdc_begin_obj(p->out, PDC_NEW_ID);
p->pattern[p->pattern_number].painttype = painttype;
pdc_begin_dict(p->out); /* pattern dict*/
p->res_id = pdc_alloc_id(p->out);
pdc_puts(p->out, "/PatternType 1\n"); /* tiling pattern */
/* colored or uncolored pattern */
pdc_printf(p->out, "/PaintType %d\n", painttype);
pdc_puts(p->out, "/TilingType 1\n"); /* constant spacing */
pdc_printf(p->out, "/BBox[0 0 %f %f]\n", width, height);
pdc_printf(p->out, "/XStep %f\n", xstep);
pdc_printf(p->out, "/YStep %f\n", ystep);
pdc_objref(p->out, "/Resources", p->res_id);
p->length_id = pdc_alloc_id(p->out);
pdc_objref(p->out, "/Length", p->length_id);
if (pdc_get_compresslevel(p->out))
pdc_puts(p->out, "/Filter/FlateDecode\n");
pdc_end_dict(p->out); /* pattern dict*/
pdc_begin_pdfstream(p->out);
slot = p->pattern_number;
p->pattern_number++;
/* top-down y-coordinates */
pdf_set_topdownsystem(p, height);
/* set color differing from PDF default */
pdf_set_default_color(p, pdc_false);
if (!p->pdc->smokerun)
pdc_logg_cond(p->pdc, 1, trc_api, "[Begin pattern %d]\n", slot);
return slot;
}
/* Finish the pattern definition. */
void
pdf__end_pattern(PDF *p)
{
/* check whether pdf__save() and pdf__restore() calls are balanced */
if (p->curr_ppt->sl > 0)
pdc_error(p->pdc, PDF_E_GSTATE_UNMATCHEDSAVE, 0, 0, 0, 0);
pdf_end_text(p);
pdc_end_pdfstream(p->out);
pdc_end_obj(p->out); /* pattern */
pdc_put_pdfstreamlength(p->out, p->length_id);
pdc_begin_obj(p->out, p->res_id); /* Resource object */
pdc_begin_dict(p->out); /* Resource dict */
pdf_write_page_fonts(p); /* Font resources */
pdf_write_page_colorspaces(p); /* Color space resources */
pdf_write_page_pattern(p); /* Pattern resources */
pdf_write_xobjects(p); /* XObject resources */
pdf_write_page_extgstates(p); /* ExtGState resources */
pdc_end_dict(p->out); /* resource dict */
pdc_end_obj(p->out); /* resource object */
pdf_pg_resume(p, -1);
if (p->flush & pdc_flush_content)
pdc_flush_stream(p->out);
if (!p->pdc->smokerun)
pdc_logg_cond(p->pdc, 1, trc_api, "[End pattern %d]\n",
p->pattern_number -1);
}
|
