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% pdfimage.w
%
% Copyright 2009-2010 Taco Hoekwater <taco@@luatex.org>
%
% This file is part of LuaTeX.
%
% LuaTeX is free software; you can redistribute it and/or modify it under
% the terms of the GNU General Public License as published by the Free
% Software Foundation; either version 2 of the License, or (at your
% option) any later version.
%
% LuaTeX is distributed in the hope that it will be useful, but WITHOUT
% ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
% FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
% License for more details.
%
% You should have received a copy of the GNU General Public License along
% with LuaTeX; if not, see <http://www.gnu.org/licenses/>.
@ @c
#include "ptexlib.h"
@ @c
void place_img(PDF pdf, image_dict * idict, scaled_whd dim, int transform)
{
float a[6]; /* transformation matrix */
float xoff, yoff, tmp;
pdfstructure *p = pdf->pstruct;
scaledpos pos = pdf->posstruct->pos;
int r; /* number of digits after the decimal point */
int k;
scaledpos tmppos;
pdffloat cm[6];
int groupref; /* added from web for 1.40.8 */
a[0] = a[3] = 1.0e6;
a[1] = a[2] = 0;
if (img_type(idict) == IMG_TYPE_PDF || img_type(idict) == IMG_TYPE_PDFMEMSTREAM
|| img_type(idict) == IMG_TYPE_PDFSTREAM) {
a[0] /= (float) img_xsize(idict);
a[3] /= (float) img_ysize(idict);
xoff = (float) img_xorig(idict) / (float) img_xsize(idict);
yoff = (float) img_yorig(idict) / (float) img_ysize(idict);
r = 6;
} else {
/* added from web for 1.40.8 */
if (img_type(idict) == IMG_TYPE_PNG) {
groupref = img_group_ref(idict);
if ((groupref > 0) && (pdf->img_page_group_val == 0))
pdf->img_page_group_val = groupref;
}
/* /added from web */
a[0] /= (float) one_hundred_bp;
a[3] = a[0];
xoff = yoff = 0;
r = 4;
}
if ((transform & 7) > 3) { /* mirror cases */
a[0] *= -1;
xoff *= -1;
}
switch ((transform + img_rotation(idict)) & 3) {
case 0: /* no transform */
break;
case 1: /* rot. 90 deg. (counterclockwise) */
a[1] = a[0];
a[2] = -a[3];
a[3] = a[0] = 0;
tmp = yoff;
yoff = xoff;
xoff = -tmp;
break;
case 2: /* rot. 180 deg. (counterclockwise) */
a[0] *= -1;
a[3] *= -1;
xoff *= -1;
yoff *= -1;
break;
case 3: /* rot. 270 deg. (counterclockwise) */
a[1] = -a[0];
a[2] = a[3];
a[3] = a[0] = 0;
tmp = yoff;
yoff = -xoff;
xoff = tmp;
break;
default:;
}
xoff *= (float) dim.wd;
yoff *= (float) (dim.ht + dim.dp);
a[0] *= (float) dim.wd;
a[1] *= (float) (dim.ht + dim.dp);
a[2] *= (float) dim.wd;
a[3] *= (float) (dim.ht + dim.dp);
a[4] = (float) pos.h - xoff;
a[5] = (float) pos.v - yoff;
k = transform + img_rotation(idict);
if ((transform & 7) > 3)
k++;
switch (k & 3) {
case 0: /* no transform */
break;
case 1: /* rot. 90 deg. (counterclockwise) */
a[4] += (float) dim.wd;
break;
case 2: /* rot. 180 deg. */
a[4] += (float) dim.wd;
a[5] += (float) (dim.ht + dim.dp);
break;
case 3: /* rot. 270 deg. */
a[5] += (float) (dim.ht + dim.dp);
break;
default:;
}
/* the following is a kludge, TODO: use pdfpage.c functions */
setpdffloat(cm[0], i64round(a[0]), r);
setpdffloat(cm[1], i64round(a[1]), r);
setpdffloat(cm[2], i64round(a[2]), r);
setpdffloat(cm[3], i64round(a[3]), r);
tmppos.h = round(a[4]);
tmppos.v = round(a[5]);
pdf_goto_pagemode(pdf);
(void) calc_pdfpos(p, tmppos);
cm[4] = p->cm[4];
cm[5] = p->cm[5];
if (pdf->img_page_group_val == 0)
pdf->img_page_group_val = img_group_ref(idict); /* added from web for 1.40.8 */
pdf_puts(pdf, "q\n");
pdf_print_cm(pdf, cm);
pdf_puts(pdf, "/Im");
pdf_print_int(pdf, img_index(idict));
pdf_print_resname_prefix(pdf);
pdf_puts(pdf, " Do\nQ\n");
addto_page_resources(pdf, obj_type_ximage, img_objnum(idict));
if (img_state(idict) < DICT_OUTIMG)
img_state(idict) = DICT_OUTIMG;
}
@ for normal output, see \.{pdflistout.w}
@c
void pdf_place_image(PDF pdf, halfword p)
{
scaled_whd dim;
image_dict *idict = idict_array[rule_index(p)];
dim.wd = width(p);
dim.ht = height(p);
dim.dp = depth(p);
place_img(pdf, idict, dim, rule_transform(p));
}
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