template<class C> raster<C>
as_raster (picture pic) {
if (pic->get_type () != picture_kind_helper<C>::kind) {
picture rew= raster_picture (pic->get_width (), pic->get_height (),
pic->get_origin_x (), pic->get_origin_y ());
pic->copy_to (rew);
pic= rew;
}
raster_picture_rep<C>* rep= (raster_picture_rep<C>*) pic->get_handle ();
return rep->r;
}
string
picture_as_eps (picture pic, int dpi) {
(void) dpi;
if (DEBUG_CONVERT) debug_convert<< "in picture_as_eps " <<LF;
static const char* d= "0123456789ABCDEF";
int w_pt= pic->get_width (), h_pt= pic->get_height ();
int ox= pic->get_origin_x (), oy= pic->get_origin_y ();
string r;
string sw= as_string (w_pt);
string sh= as_string (h_pt);
r << "%!PS-Adobe-3.0 EPSF-3.0\n%%Creator: TeXmacs\n%%BoundingBox: 0 0 "
<< sw << " " << sh
<< "\n\n% Created by picture_as_eps ()\n\n%%BeginProlog\nsave\n"
<< "countdictstack\nmark\nnewpath\n/showpage {} def\n/setpagedevice "
<< "{pop} def\n%%EndProlog\n%%Page 1 1\n"
<< "/max { 2 copy lt { exch } if pop } bind def\n"
<< "/ImageWidth " << sw
<< " def\n/ImageHeight " << sh << " def\nImageWidth ImageHeight max "
<< "ImageWidth ImageHeight max scale\n\n/ImageDatas\n\tcurrentfile\n\t"
<< "<< /Filter /ASCIIHexDecode >>\n\t/ReusableStreamDecode\n\tfilter\n";
int v, i= 0, j= 0, k= 0, l= 0;
bool alpha= false;
for (j=0; j < h_pt; j++)
for (i=0; i < w_pt; i++) {
color col= pic->get_pixel (i - ox, h_pt - 1 - j - oy);
int rr, gg, bb, aa;
get_rgb_color (col, rr, gg, bb, aa);
if (aa != 255) alpha= true;
}
string mask;
for (j= 0; j < h_pt; j++) {
for (i=0; i < w_pt; i++) {
l++;
color col= pic->get_pixel (i - ox, h_pt - 1 - j - oy);
int rr, gg, bb, aa;
get_rgb_color (col, rr, gg, bb, aa);
rr= (rr * aa + 255 * (255 - aa)) / 255;
gg= (gg * aa + 255 * (255 - aa)) / 255;
bb= (bb * aa + 255 * (255 - aa)) / 255;
r << as_hexadecimal (rr, 2);
r << as_hexadecimal (gg, 2);
r << as_hexadecimal (bb, 2);
if (l > 12) {
r << "\n";
l= 0;
}
}
if (alpha) {
v = 0;
for (i=0; i < w_pt; i++) {
color col= pic->get_pixel (i - ox, h_pt - 1 - j - oy);
int rr, gg, bb, aa;
get_rgb_color (col, rr, gg, bb, aa);
v += (aa <= 32) << (3 - i % 4);
if (i % 4 == 3 || i + 1 == w_pt) {
mask << d[v];
v= 0;
k++;
// Padding of the image data mask
if (i + 1 == w_pt && k % 2 == 1) {
mask << d[0];
k++;
}
// Code layout
if (k >= 78) {
mask << "\n";
k= 0;
}
}
}
}
}
r << ">\ndef\n\n";
if (alpha) {
r << "/MaskDatas\n\tcurrentfile\n\t<< /Filter /ASCIIHexDecode >>\n"
<< "\t/ReusableStreamDecode\n\tfilter\n"
<< mask
<< ">\ndef\n\n"
<< "/TheMask\n<<\n\t/ImageType\t1\n\t/Width\t\tImageWidth\n\t/Height\t"
<< "\tImageHeight\n\t/BitsPerComponent 1\n\t/Decode [ 0 1 ]\n\t"
<< "/ImageMatrix [ ImageWidth 0 0 ImageWidth neg 0 ImageHeight ]\n\t"
<< "/DataSource MaskDatas\n>> def\n\n";
}
r << "/TheImage\n<<\n\t/ImageType\t1\n\t/Width\t\tImageWidth\n\t/Height\t"
<< "\tImageHeight\n\t/BitsPerComponent 8\n\t/Decode [ 0 1 0 1 0 1 ]\n\t"
<< "/ImageMatrix [ ImageWidth 0 0 ImageWidth neg 0 ImageHeight ]\n\t"
<< "/DataSource ImageDatas\n>> def\n\n"
<< "/DeviceRGB setcolorspace\n";
if (alpha) {
r << "<<\n\t/ImageType 3\n\t/InterleaveType 3\n\t/DataDict TheImage\n"
<< "\t/MaskDict TheMask\n>>";
}
else {
r << "\tTheImage";
}
r << "\nimage\nshowpage\n%%Trailer\ncleartomark\ncountdictstack\n"
<< "exch sub { end } repeat\nrestore\n%%EOF\n";
return r;
}
inline void copy_from (picture s) {
internal_copy_from (0, 0, s, 0, 0, s->get_width (), s->get_height ()); }
