void
gs_to_ps (url doc, url ps, bool landscape, double paper_h, double paper_w) {
if (DEBUG_CONVERT) debug_convert << "gs_to_ps"<<LF;
string cmd= gs_prefix ();
cmd << "-dQUIET -dNOPAUSE -dBATCH -dSAFER -sDEVICE=ps2write ";
if (landscape)
cmd << "-dDEVICEWIDTHPOINTS=" << as_string ((int) (28.36*paper_h+ 0.5))
<< " -dDEVICEHEIGHTPOINTS=" << as_string ((int) (28.36*paper_w+ 0.5));
else
cmd << "-dDEVICEWIDTHPOINTS=" << as_string ((int) (28.36*paper_w+ 0.5))
<< " -dDEVICEHEIGHTPOINTS=" << as_string ((int) (28.36*paper_h+ 0.5));
cmd << " -sOutputFile=" << sys_concretize (ps) << " ";
cmd << sys_concretize (doc);
cmd << " -c \"[ /Title (" << as_string (tail(ps)) << ") /DOCINFO pdfmark\" ";
// NOTE: when converting from pdf to ps the title of the document is
// incorrectly referring to the name of the temporary file
// so we add some PS code to override the PS document title with
// the name of the PS file.
system (cmd);
if (DEBUG_CONVERT) debug_convert << cmd <<LF
<<"ps generated? "<< exists(ps)<<LF;
}
void
gs_to_png (url image, url png, int w, int h) {
if (use_converts (image)) {
string cmd= "convert ";
cmd << "-density 300x300 -geometry " << as_string (w) << "x" << as_string (h) << "! ";
cmd << sys_concretize (image) << " ";
cmd << sys_concretize (png);
system (cmd);
}
else {
string cmd= gs_prefix ();
cmd << "-dQUIET -dNOPAUSE -dBATCH -dSAFER ";
cmd << "-sDEVICE=png16m -dGraphicsAlphaBits=4 -dTextAlphaBits=4 -dEPSCrop ";
cmd << "-g" << as_string (w) << "x" << as_string (h) << " ";
int bbw, bbh;
int rw, rh;
gs_image_size (image, bbw, bbh);
rw= (w*72-1)/bbw+1;
rh= (h*72-1)/bbh+1;
cmd << "-r" << as_string (rw) << "x" << as_string (rh) << " ";
cmd << "-sOutputFile=" << sys_concretize (png) << " ";
cmd << sys_concretize (image);
system (cmd);
}
}
// This conversion is appropriate for eps images
// (originally implemented in pdf_image_rep::flush)
void
gs_to_pdf (url image, url pdf, int w, int h) {
string cmd;
if (DEBUG_CONVERT) debug_convert << "(eps) gs_to_pdf"<<LF;
string s= suffix (image);
// take care of properly handling the bounding box
// the resulting pdf image will always start at 0,0.
int bx1, by1, bx2, by2; // bounding box
ps_bounding_box(image, bx1, by1, bx2, by2);
double scale_x = w/((double)(bx2-bx1));
double scale_y = h/((double)(by2-by1));
cmd= gs_prefix();
cmd << " -dQUIET -dNOPAUSE -dBATCH -dSAFER -sDEVICE=pdfwrite ";
cmd << "-dAutoRotatePages=/None ";
cmd << "-dCompatibilityLevel=" << pdf_version () << " ";
cmd << " -sOutputFile=" << sys_concretize(pdf) << " ";
cmd << " -c \" << /PageSize [ " << as_string(bx2-bx1) << " " << as_string(by2-by1)
<< " ] >> setpagedevice gsave "
<< as_string(-bx1) << " " << as_string(-by1) << " translate "
<< as_string(scale_x) << " " << as_string(scale_y) << " scale \"";
cmd << " -f " << sys_concretize (image);
cmd << " -c \" grestore \" ";
// debug_convert << cmd << LF;
system(cmd);
if (DEBUG_CONVERT)
debug_convert << cmd << LF << "pdf generated? " << exists(pdf) << LF;
}
void
tm_gs (url image) {
string cmd= gs_prefix ();
cmd << "-q -sDEVICE=x11alpha -dBATCH -dNOPAUSE -dSAFER -dNOEPS ";
cmd << sys_concretize (image);
system (cmd);
}
bool
gs_to_png (url image, url png, int w, int h) { //Achtung! w,h in pixels
string cmd;
if (DEBUG_CONVERT) debug_convert << "gs_to_png using gs"<<LF;
cmd= gs_prefix ();
cmd << "-dQUIET -dNOPAUSE -dBATCH -dSAFER ";
cmd << "-sDEVICE=png16m -dGraphicsAlphaBits=4 -dTextAlphaBits=4 ";
cmd << "-g" << as_string (w) << "x" << as_string (h) << " ";
cmd << "-sOutputFile=" << sys_concretize (png) << " ";
int bbw, bbh;
int rw, rh;
int bx1, by1, bx2, by2;
if (suffix(image) == "pdf")
image_size (image, bbw, bbh);
//don't call gs_PDFimage_size
//in order to benefit from caching
else {
ps_bounding_box (image, bx1, by1, bx2, by2); //same comment
bbw=bx2-bx1;
bbh=by2-by1;
}
rw=(w*72)/bbw;
rh=(h*72)/bbh;
cmd << "-r" << as_string (rw) << "x" << as_string (rh) << " ";
if (DEBUG_CONVERT) debug_convert << "w="<<w<<" h="<<h<<LF
<< "bbw="<<bbw<<" bbh="<<bbh<<LF
<<" res ="<<rw<<" * "<<rh <<LF;
if (suffix(image) == "pdf") {
cmd << "-dUseCropBox "; // old gs versions (<9.0 ?) fail if CropBox not explicitly defined
cmd << sys_concretize (image);
}
else {
//don't use -dEPSCrop which works incorrectly if (bx1 != 0 || by1 != 0)
cmd << "-c \" "<< as_string (-bx1) << " "<< as_string (-by1) <<" translate gsave \" -f "
<< sys_concretize (image) << " -c \" grestore \"";
}
string ans= eval_system (cmd);
if (DEBUG_CONVERT) debug_convert << cmd <<LF
<<"answer :"<<ans <<LF;
if (! exists(png)) {
convert_error << "gs_to_png failed for "<< image <<LF;
return false;
}
return true;
}
void
gs_to_eps (url image, url eps) {
if (use_converts (image)) {
string cmd= "convert ";
cmd << sys_concretize (image) << " ";
cmd << sys_concretize (eps);
system (cmd);
}
else {
string cmd= gs_prefix ();
cmd << "-dQUIET -dNOPAUSE -dBATCH -dSAFER ";
cmd << "-sDEVICE=epswrite -dEPSCrop ";
cmd << "-sOutputFile=" << sys_concretize (eps) << " ";
cmd << sys_concretize (image);
system (cmd);
}
}
void
gs_to_pdf (url doc, url pdf, bool landscape, double paper_h, double paper_w) {
string cmd= gs_prefix ();
cmd << "-dQUIET -dNOPAUSE -dBATCH -dSAFER -sDEVICE=pdfwrite ";
if (landscape)
cmd << "-dDEVICEWIDTHPOINTS=" << as_string ((int) (28.36*paper_h+ 0.5))
<< " -dDEVICEHEIGHTPOINTS=" << as_string ((int) (28.36*paper_w+ 0.5));
else
cmd << "-dDEVICEWIDTHPOINTS=" << as_string ((int) (28.36*paper_w+ 0.5))
<< " -dDEVICEHEIGHTPOINTS=" << as_string ((int) (28.36*paper_h+ 0.5));
cmd << " -sOutputFile=" << sys_concretize (pdf) << " ";
cmd << sys_concretize (doc);
cmd << " -c \"[ /Title (" << as_string (tail(pdf)) << ") /DOCINFO pdfmark\" ";
// NOTE: when converting from ps to pdf the title of the document is
// incorrectly referring to the name of the temporary file
// so we add some PS code to override the PDF document title with
// the name of the PDF file.
system (cmd);
}
void
gs_to_eps (url image, url eps) { //this should be used mostly for pdf->eps conversion.
string cmd;
int bx1, by1, bx2, by2; // bounding box
if (DEBUG_CONVERT) debug_convert << "gs_to_eps"<<LF;
cmd= gs_prefix ();
cmd << "-dQUIET -dNOPAUSE -dBATCH -dSAFER ";
cmd << "-sDEVICE="<<eps_device ();
cmd << " -sOutputFile=" << sys_concretize (eps) << " ";
if (suffix(image) == "pdf") {
image_size (image, bx2, by2);
bx1=by1=0;
cmd << "-dUseCropBox "
<< " -dDEVICEWIDTHPOINTS=" << as_string (bx2)
<< " -dDEVICEHEIGHTPOINTS=" << as_string (by2)<<" "
<< sys_concretize (image);
}
else {
ps_bounding_box (image, bx1, by1, bx2, by2);
cmd << " -dDEVICEWIDTHPOINTS=" << as_string (bx2-bx1)
<< " -dDEVICEHEIGHTPOINTS=" << as_string (by2-by1)<<" ";
//don't use -dEPSCrop which works incorrectly if (bx1 != 0 || by1 != 0)
cmd << "-c \" "<< as_string (-bx1) << " " << as_string (-by1)
<< " translate gsave \" "
<< sys_concretize (image)
<< " -c \" grestore \"";
}
string ans= eval_system (cmd);
if (DEBUG_CONVERT) debug_convert << cmd <<LF
<<"answer :"<<ans <<LF
<<"eps generated? "<< exists(eps)<<LF;
// eps(2)write and bbox devices do a "smart" job of finding the boundingbox on their own,
// possibly changing the original margins/aspect ratio defined by the pdf CropBox|MediaBox
// here were restore the original size.
gs_fix_bbox (eps, 0, 0, bx2-bx1, by2-by1);
}
string
gs_prefix () {
#if defined (__MINGW__) || defined (__MINGW32__)
static string cmd; // no need to resolve each time
if (cmd == "") {
url gs= resolve_in_path ("gswin32c");
if(is_none(gs))
gs= url_system (get_env ("TEXMACS_PATH")) * "bin" * "gswin32c";
cmd= sys_concretize (gs) * " ";
}
return copy (cmd);
#else
return "gs ";
#endif
}
void
gs_image_size (url image, int& w_pt, int& h_pt) {
string buf;
bool err= load_string (image, buf, false);
if (!err && gs_image_size_sub (buf, w_pt, h_pt)) return;
if (!err) {
string cmd= gs_prefix ();
cmd << "-dQUIET -dNOPAUSE -dBATCH -dSAFER -dEPSCrop -sDEVICE=bbox ";
cmd << sys_concretize (image);
buf= eval_system (cmd);
}
if (!err && gs_image_size_sub (buf, w_pt, h_pt)) return;
convert_error << "Cannot read image file '" << image << "'"
<< " in gs_image_size" << LF;
w_pt= 0; h_pt= 0;
}
void
gs_image_size (url image, int& w_pt, int& h_pt) {
bool ok;
if (suffix (image) == "pdf")
ok= gs_PDFimage_size (image, w_pt, h_pt);
else {
if (DEBUG_CONVERT) debug_convert << "gs eps image size :"<<LF;
int x1,y1,x2,y2;
string buf;
ok= !load_string (image, buf, false);
if (ok) {
//try finding Bounding box in file:
ok= ps_read_bbox (buf, x1, y1, x2, y2);
if (!ok) {
// bbox not found ask gs to compute one :
string cmd= gs_prefix ();
cmd << "-dQUIET -dNOPAUSE -dBATCH -dSAFER -sDEVICE=bbox ";
//Note: bbox device does a "smart" job of finding the cropbox on its own removing blank margins (*even* on eps files)
//this is ok if we are reading a ps page
// real eps pages with proper bounding boxes have been recognized before this and will have their BoundingBox respected
cmd << sys_concretize (image);
buf= eval_system (cmd);
if (DEBUG_CONVERT) debug_convert << "gs cmd :"<<cmd<<LF
<<"answer :"<< buf ;
ok= ps_read_bbox (buf, x1, y1, x2, y2);
}
if (ok) {
w_pt= x2-x1;
h_pt= y2-y1;
set_imgbox_cache(image->t, w_pt, h_pt, x1, y1);
}
}
}
if (!ok) {
convert_error << "Cannot read image file '" << image << "'"
<< " in gs_image_size" << LF;
w_pt= 0; h_pt= 0;
}
}
inline void system (string which, url u1, const char* sep, url u2) {
system (which * " " * sys_concretize (u1) * " " * sep *
" " * sys_concretize (u2)); }
inline void system (string which, url u1, const char* post) {
system (which * " " * sys_concretize (u1) * " " * post); }
inline void system (string which, url u1, url u2) {
system (which * " " * sys_concretize (u1) * " " * sys_concretize (u2)); }
bool
gs_PDFimage_size (url image, int& w_pt, int& h_pt) {
if (DEBUG_CONVERT) debug_convert << "gs PDF image size :"<<LF;
string buf;
string cmd= gs_prefix ();
cmd << "-dNODISPLAY -q -sFile=";
cmd << sys_concretize (image);
cmd <<" "<<sys_concretize ("$TEXMACS_PATH/misc/convert/pdf_info.ps");
buf= eval_system (cmd);
if (DEBUG_CONVERT) debug_convert << "gs cmd :"<<cmd<<LF
<<"answer :"<< buf ;
//if CropBox is defined, then use it, else Mediabox
string type="CropBox";
int pos= search_forwards ("CropBox: [", buf);
if (pos < 0) {
type="MediaBox";
pos= search_forwards ("MediaBox: [", buf);
if (pos < 0) {
if (DEBUG_CONVERT) debug_convert << "CropBox|MediaBox not found"<<LF;
return false;
}
}
bool ok= read (buf, pos, type*": [");
double X1, Y1, X2, Y2;
int x1, y1, x2, y2;
skip_spaces (buf, pos);
ok= read_double (buf, pos, X1) && ok;
x1= (int) floor (X1);
skip_spaces (buf, pos);
ok= read_double (buf, pos, Y1) && ok;
y1= (int) floor (Y1);
skip_spaces (buf, pos);
ok= read_double (buf, pos, X2) && ok;
x2= (int) ceil (X2);
skip_spaces (buf, pos);
ok= read_double (buf, pos, Y2) && ok;
y2= (int) ceil (Y2);
if (!ok) {
if (DEBUG_CONVERT) debug_convert << "box dims not found"<<LF;
return false;
}
w_pt= x2-x1;
h_pt= y2-y1;
pos= search_forwards ("Rotate =", buf);
ok= read (buf, pos, "Rotate =");
int rot;
if (ok) {
skip_spaces (buf, pos);
ok = read_int (buf, pos, rot) ;
if (ok) {
rot = rot%360;
if (rot < 0) rot +=360;
if ((rot % 180) == 90 ) {//the image is rotated : swap axes lengths
if (DEBUG_CONVERT) debug_convert << "Rotate ="<<rot<<LF;
h_pt= x2-x1;
w_pt= y2-y1;
}
}
else {
if (DEBUG_CONVERT) debug_convert << "Rotate not found"<<LF;
return false;
}
}
if (DEBUG_CONVERT) debug_convert << type<< " size ="<<w_pt<<" x "<< h_pt <<LF;
return true;
}
