void
pdf__initgraphics(PDF *p)
{
pdc_matrix inv_ctm;
pdf_reset_gstate(p);
pdc_invert_matrix(p->pdc, &inv_ctm, &p->gstate[p->sl].ctm);
pdf_concat_raw(p, &inv_ctm);
/* This also resets the CTM which guards against rounding artifacts. */
pdf_init_gstate(p);
}
PDFLIB_API void PDFLIB_CALL
PDF_place_image(PDF *p, int im, float x, float y, float scale)
{
static const char fn[] = "PDF_place_image";
pdf_matrix m;
pdf_image *image;
int row;
int imageno;
PDF_TRACE(("%s\t(pdf[%p], %d, %f, %f, %f);\n",
fn, (void *) p, im, x, y, scale));
if (PDF_SANITY_CHECK_FAILED(p))
return;
if (im < 0 || im >= p->images_capacity || !p->images[im].in_use
|| p->xobjects[p->images[im].no].type == pdi_xobject)
{
pdf_error(p, PDF_ValueError,
"Bad image or template handle %d in PDF_place_image", im);
}
PDF_CHECK_SCOPE(p, fn, pdf_state_ppt);
if (PDF_GET_STATE(p) == pdf_state_template && im == p->templ)
pdf_error(p, PDF_ValueError,
"Can't use template within its own definition");
image = &p->images[im];
if (fabs(scale) < (float) PDF_SMALLREAL)
pdf_error(p, PDF_ValueError,
"Scaling factor 0 for image %s", image->filename);
if (p->xobjects[image->no].type == form_xobject) {
pdf_end_text(p);
pdf_begin_contents_section(p);
imageno = image->no;
m.a = scale;
m.d = scale;
m.b = m.c = (float) 0.0;
m.e = x;
m.f = y;
PDF_save(p);
pdf_concat_raw(p, &m);
if (!p->inheritgs)
pdf_reset_gstate(p);
pdf_printf(p, "/I%d Do\n", imageno);
p->xobjects[imageno].flags |= xobj_flag_write;
PDF_restore(p);
return;
}
switch (image->colorspace) {
case ImageMask:
case DeviceGray:
p->procset |= ImageB;
break;
/*
* It appears that indexed images require both, although this is
* not documented.
*/
case Indexed:
p->procset |= ImageI;
p->procset |= ImageC;
break;
case DeviceRGB:
case DeviceCMYK:
p->procset |= ImageC;
break;
case CalGray:
case CalRGB:
case Lab:
case PatternCS:
case Separation:
pdf_error(p, PDF_SystemError,
"Bogus colorspace (%d) in PDF_place_image",
(int) image->colorspace);
/* image has been colorized with a spot color */
default:
break;
/* york: check the above carefully!
** original version:
default:
pdf_error(p, PDF_SystemError,
"Bogus colorspace (%d) in PDF_place_image",
(int) image->colorspace);
*/
}
pdf_end_text(p);
pdf_begin_contents_section(p);
imageno = image->no; /* number of first strip */
if (image->strips == 1)
image->rowsperstrip = (int) image->height;
for (row = 0; row < image->height; row += image->rowsperstrip, imageno++) {
int height; /* height of the current strip */
height = (row + image->rowsperstrip > image->height ?
(int) image->height - row : image->rowsperstrip);
PDF_save(p);
m.a = image->width * scale;
m.d = height * scale;
m.b = m.c = (float) 0.0;
m.e = x;
m.f = y + scale * (image->height - row - height);
pdf_concat_raw(p, &m);
pdf_printf(p, "/I%d Do\n", imageno);
p->xobjects[imageno].flags |= xobj_flag_write;
if (image->mask != -1)
p->xobjects[p->images[image->mask].no].flags |= xobj_flag_write;
PDF_restore(p);
}
}
